Subjects -> ENGINEERING (Total: 2918 journals)
    - CHEMICAL ENGINEERING (259 journals)
    - CIVIL ENGINEERING (255 journals)
    - ELECTRICAL ENGINEERING (182 journals)
    - ENGINEERING (1464 journals)
    - ENGINEERING MECHANICS AND MATERIALS (476 journals)
    - HYDRAULIC ENGINEERING (60 journals)
    - INDUSTRIAL ENGINEERING (101 journals)
    - MECHANICAL ENGINEERING (121 journals)

ENGINEERING (1464 journals)                  1 2 3 4 5 6 7 8 | Last

Showing 1 - 200 of 1205 Journals sorted alphabetically
3 Biotech     Open Access   (Followers: 9)
3D Research     Hybrid Journal   (Followers: 22)
AAPG Bulletin     Hybrid Journal   (Followers: 11)
Abstract and Applied Analysis     Open Access   (Followers: 4)
Aceh International Journal of Science and Technology     Open Access   (Followers: 9)
ACS Nano     Hybrid Journal   (Followers: 448)
Acta Geotechnica     Hybrid Journal   (Followers: 7)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 10)
Acta Nova     Open Access   (Followers: 1)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 4)
Acta Scientiarum. Technology     Open Access   (Followers: 3)
Acta Universitatis Cibiniensis. Technical Series     Open Access   (Followers: 1)
Active and Passive Electronic Components     Open Access   (Followers: 8)
Adaptive Behavior     Hybrid Journal   (Followers: 9)
Adsorption     Hybrid Journal   (Followers: 5)
Advanced Energy and Sustainability Research     Open Access   (Followers: 7)
Advanced Engineering Forum     Full-text available via subscription   (Followers: 14)
Advanced Engineering Research     Open Access  
Advanced Journal of Graduate Research     Open Access   (Followers: 4)
Advanced Quantum Technologies     Hybrid Journal   (Followers: 1)
Advanced Science     Open Access   (Followers: 13)
Advanced Science Focus     Free   (Followers: 7)
Advanced Science Letters     Full-text available via subscription   (Followers: 13)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 11)
Advanced Synthesis & Catalysis     Hybrid Journal   (Followers: 20)
Advanced Theory and Simulations     Hybrid Journal   (Followers: 5)
Advances in Catalysis     Full-text available via subscription   (Followers: 8)
Advances in Complex Systems     Hybrid Journal   (Followers: 12)
Advances in Engineering Software     Hybrid Journal   (Followers: 31)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 20)
Advances in Fuzzy Systems     Open Access   (Followers: 5)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 22)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 30)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 27)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 10)
Advances in Natural Sciences : Nanoscience and Nanotechnology     Open Access   (Followers: 36)
Advances in Operations Research     Open Access   (Followers: 14)
Advances in OptoElectronics     Open Access   (Followers: 6)
Advances in Physics Theories and Applications     Open Access   (Followers: 21)
Advances in Polymer Science     Hybrid Journal   (Followers: 53)
Advances in Porous Media     Full-text available via subscription   (Followers: 6)
Advances in Remote Sensing     Open Access   (Followers: 58)
Advances in Science and Research (ASR)     Open Access   (Followers: 8)
Aerobiologia     Hybrid Journal   (Followers: 4)
Aerospace Systems     Hybrid Journal   (Followers: 10)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 8)
AIChE Journal     Hybrid Journal   (Followers: 38)
Ain Shams Engineering Journal     Open Access   (Followers: 7)
Al-Nahrain Journal for Engineering Sciences     Open Access  
Al-Qadisiya Journal for Engineering Sciences     Open Access   (Followers: 2)
AL-Rafdain Engineering Journal     Open Access   (Followers: 3)
Alexandria Engineering Journal     Open Access   (Followers: 3)
AMB Express     Open Access   (Followers: 1)
American Journal of Applied Sciences     Open Access   (Followers: 27)
American Journal of Engineering and Applied Sciences     Open Access   (Followers: 12)
American Journal of Engineering Education     Open Access   (Followers: 20)
American Journal of Environmental Engineering     Open Access   (Followers: 16)
American Journal of Industrial and Business Management     Open Access   (Followers: 31)
Annals of Civil and Environmental Engineering     Open Access   (Followers: 3)
Annals of Combinatorics     Hybrid Journal   (Followers: 3)
Annals of Pure and Applied Logic     Open Access   (Followers: 6)
Annals of Regional Science     Hybrid Journal   (Followers: 10)
Annals of Science     Hybrid Journal   (Followers: 10)
Annual Journal of Technical University of Varna     Open Access   (Followers: 1)
Antarctic Science     Hybrid Journal   (Followers: 1)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 3)
Applicable Analysis: An International Journal     Hybrid Journal   (Followers: 2)
Applications in Energy and Combustion Science     Open Access   (Followers: 2)
Applications in Engineering Science     Open Access   (Followers: 1)
Applied Catalysis A: General     Hybrid Journal   (Followers: 8)
Applied Catalysis B: Environmental     Hybrid Journal   (Followers: 22)
Applied Clay Science     Hybrid Journal   (Followers: 6)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 16)
Applied Engineering Letters     Open Access   (Followers: 3)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 4)
Applied Nanoscience     Open Access   (Followers: 11)
Applied Network Science     Open Access   (Followers: 3)
Applied Numerical Mathematics     Hybrid Journal   (Followers: 6)
Applied Physics Research     Open Access   (Followers: 7)
Applied Sciences     Open Access   (Followers: 6)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 6)
Arab Journal of Basic and Applied Sciences     Open Access  
Arabian Journal for Science and Engineering     Hybrid Journal   (Followers: 5)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 6)
Archives of Thermodynamics     Open Access   (Followers: 13)
Arctic     Open Access   (Followers: 7)
Arid Zone Journal of Engineering, Technology and Environment     Open Access   (Followers: 2)
Arkiv för Matematik     Hybrid Journal   (Followers: 1)
ArtefaCToS : Revista de estudios sobre la ciencia y la tecnología     Open Access   (Followers: 1)
Asia-Pacific Journal of Science and Technology     Open Access  
Asian Engineering Review     Open Access  
Asian Journal of Applied Science and Engineering     Open Access   (Followers: 2)
Asian Journal of Applied Sciences     Open Access   (Followers: 2)
Asian Journal of Biotechnology     Open Access   (Followers: 9)
Asian Journal of Control     Hybrid Journal  
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 7)
Assembly Automation     Hybrid Journal   (Followers: 2)
ATZagenda     Hybrid Journal  
ATZextra worldwide     Hybrid Journal  
AURUM : Mühendislik Sistemleri ve Mimarlık Dergisi = Aurum Journal of Engineering Systems and Architecture     Open Access   (Followers: 1)
Australasian Journal of Engineering Education     Hybrid Journal   (Followers: 3)
Australasian Physical & Engineering Sciences in Medicine     Hybrid Journal   (Followers: 1)
Australian Journal of Multi-Disciplinary Engineering     Hybrid Journal   (Followers: 2)
Autocracy : Jurnal Otomasi, Kendali, dan Aplikasi Industri     Open Access  
Automotive and Engine Technology     Hybrid Journal  
Automotive Experiences     Open Access  
Automotive Innovation     Hybrid Journal   (Followers: 1)
Avances en Ciencias e Ingenierías     Open Access  
Avances: Investigación en Ingeniería     Open Access   (Followers: 6)
Balkan Region Conference on Engineering and Business Education     Open Access   (Followers: 2)
Bangladesh Journal of Scientific and Industrial Research     Open Access  
Basin Research     Hybrid Journal   (Followers: 6)
Batteries     Open Access   (Followers: 11)
Batteries & Supercaps     Hybrid Journal   (Followers: 7)
Bautechnik     Hybrid Journal   (Followers: 3)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 29)
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 3)
Beyond : Undergraduate Research Journal     Open Access  
Bhakti Persada : Jurnal Aplikasi IPTEKS     Open Access  
Bharatiya Vaigyanik evam Audyogik Anusandhan Patrika (BVAAP)     Open Access   (Followers: 1)
Bilge International Journal of Science and Technology Research     Open Access   (Followers: 1)
Biointerphases     Open Access   (Followers: 1)
Biomaterials Science     Full-text available via subscription   (Followers: 14)
Biomedical Engineering     Hybrid Journal   (Followers: 15)
Biomedical Engineering and Computational Biology     Open Access   (Followers: 13)
Biomedical Engineering Letters     Hybrid Journal   (Followers: 5)
Biomedical Engineering: Applications, Basis and Communications     Hybrid Journal   (Followers: 5)
Biomedical Microdevices     Hybrid Journal   (Followers: 8)
Biomedical Science and Engineering     Open Access   (Followers: 7)
Biomicrofluidics     Open Access   (Followers: 7)
Biotechnology Progress     Hybrid Journal   (Followers: 44)
Black Sea Journal of Engineering and Science     Open Access  
Botswana Journal of Technology     Full-text available via subscription   (Followers: 1)
Boundary Value Problems     Open Access   (Followers: 1)
Brazilian Journal of Science and Technology     Open Access   (Followers: 2)
Bulletin of Canadian Petroleum Geology     Full-text available via subscription   (Followers: 13)
Bulletin of Engineering Geology and the Environment     Hybrid Journal   (Followers: 15)
Bulletin of the Crimean Astrophysical Observatory     Hybrid Journal  
Cahiers Droit, Sciences & Technologies     Open Access   (Followers: 1)
Calphad     Hybrid Journal   (Followers: 2)
Canadian Geotechnical Journal     Hybrid Journal   (Followers: 30)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 50)
Carbon Resources Conversion     Open Access   (Followers: 3)
Carpathian Journal of Electronic and Computer Engineering     Open Access  
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 6)
Case Studies in Thermal Engineering     Open Access   (Followers: 8)
Catalysis Communications     Hybrid Journal   (Followers: 7)
Catalysis Letters     Hybrid Journal   (Followers: 3)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 9)
Catalysis Science and Technology     Hybrid Journal   (Followers: 13)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 4)
Catalysis Today     Hybrid Journal   (Followers: 8)
CEAS Space Journal     Hybrid Journal   (Followers: 6)
Cell Reports Physical Science     Open Access  
Cellular and Molecular Neurobiology     Hybrid Journal   (Followers: 2)
Central European Journal of Engineering     Hybrid Journal  
Chaos : An Interdisciplinary Journal of Nonlinear Science     Hybrid Journal   (Followers: 3)
Chaos, Solitons & Fractals     Hybrid Journal   (Followers: 3)
Chaos, Solitons & Fractals : X     Open Access   (Followers: 1)
Chinese Journal of Catalysis     Full-text available via subscription   (Followers: 3)
Chinese Journal of Engineering     Open Access   (Followers: 2)
Chinese Journal of Population, Resources and Environment     Open Access  
Chinese Science Bulletin     Open Access   (Followers: 1)
Ciencia e Ingenieria Neogranadina     Open Access  
Ciencia en su PC     Open Access   (Followers: 1)
Ciencia y Tecnología     Open Access  
Ciencias Holguin     Open Access   (Followers: 2)
CienciaUAT     Open Access   (Followers: 1)
Cientifica     Open Access  
CIRP Annals - Manufacturing Technology     Hybrid Journal   (Followers: 11)
CIRP Journal of Manufacturing Science and Technology     Hybrid Journal   (Followers: 14)
City, Culture and Society     Hybrid Journal   (Followers: 27)
Clay Minerals     Hybrid Journal   (Followers: 9)
Coal Science and Technology     Full-text available via subscription   (Followers: 4)
Coastal Engineering     Hybrid Journal   (Followers: 14)
Coastal Engineering Journal     Hybrid Journal   (Followers: 9)
Coastal Engineering Proceedings : Proceedings of the International Conference on Coastal Engineering     Open Access   (Followers: 2)
Coastal Management     Hybrid Journal   (Followers: 30)
Coatings     Open Access   (Followers: 4)
Cogent Engineering     Open Access   (Followers: 3)
Cognitive Computation     Hybrid Journal   (Followers: 3)
Color Research & Application     Hybrid Journal   (Followers: 4)
COMBINATORICA     Hybrid Journal  
Combustion Theory and Modelling     Hybrid Journal   (Followers: 17)
Combustion, Explosion, and Shock Waves     Hybrid Journal   (Followers: 20)
Communications Faculty of Sciences University of Ankara Series A2-A3 Physical Sciences and Engineering     Open Access  
Communications in Numerical Methods in Engineering     Hybrid Journal   (Followers: 2)
Components, Packaging and Manufacturing Technology, IEEE Transactions on     Hybrid Journal   (Followers: 28)
Composite Interfaces     Hybrid Journal   (Followers: 10)
Composite Structures     Hybrid Journal   (Followers: 334)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 275)
Composites Part B : Engineering     Hybrid Journal   (Followers: 311)
Composites Part C : Open Access     Open Access   (Followers: 3)
Composites Science and Technology     Hybrid Journal   (Followers: 245)
Comptes Rendus : Mécanique     Open Access   (Followers: 2)
Computation     Open Access   (Followers: 1)
Computational Geosciences     Hybrid Journal   (Followers: 20)
Computational Optimization and Applications     Hybrid Journal   (Followers: 11)
Computer Applications in Engineering Education     Hybrid Journal   (Followers: 6)
Computer Science and Engineering     Open Access   (Followers: 20)

        1 2 3 4 5 6 7 8 | Last

Similar Journals
Journal Cover
Automotive and Engine Technology
Number of Followers: 0  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 2365-5127 - ISSN (Online) 2365-5135
Published by Springer-Verlag Homepage  [2658 journals]
  • Acoustic effects of the coolant mass flow of an electric machine of a
           hybrid drive train

    • Free pre-print version: Loading...

      Abstract: In this application paper, the influence of the coolant mantle on the acoustic radiation behaviour of a hybrid drive train is investigated. This was done on an electric machine on an acoustic component test bench. The coolant mass flow around the electric machine stator was varied and then completely drained. The electrical machine remained mechanically unchanged; any variations were made to the feed pumps on the test bench side. Triaxial acceleration sensors are glued to the machine housing and reviewed as evaluation criteria. For the evaluation, the square mean value of all three spatial directions of the glued acceleration sensors was calculated. The evaluation shows that there is no significant acoustic difference between an active stator cooling jacket and a stationary stator cooling jacket. If the stator cooling jacket is pumped out empty so that air remains in it, there is a strong reduction in surface acceleration. The observations are confirmed by analytical literature values. The results presented serve as a basis for further work and developments.
      PubDate: 2019-10-14
      DOI: 10.1007/s41104-019-00053-x
       
  • Generic model for production-related requirements and their
           interdependencies on the example of automotive chassis

    • Free pre-print version: Loading...

      Abstract: In an era of rapidly changing trends and customer requirements, the necessity of agile product development processes has arisen. Currently used processes are not sustainable because they are not able to handle future volatility considering early phase requirements and would lead to late and expensive changes in product design. In the context of the automobile industry, the early phase of the product development has to deal with requirements, designing a modular vehicle architecture, which includes all models of a product family. An empirical research was conducted to generate a thorough list of production-related requirements for the chassis, between interacting departments and roles within an automotive OEM. The resulting generic model showed the interdependencies between the analysed requirements. Additionally, the aim is to measure the maturity level of the individual production-related requirements at specific phases. The first benefit of this model is to show through the interdependencies between existing production requirements, how a change would affect the system. Secondly, it is possible to measure the existing production-related issues through a maturity model, which specifies the level of completion of single components at specific phases, and thus give a value to the product development process.
      PubDate: 2019-09-26
      DOI: 10.1007/s41104-019-00052-y
       
  • Prediction of the airborne sound transmission through the front end of a
           vehicle

    • Free pre-print version: Loading...

      Abstract: Acoustics represents a quality feature of a passenger vehicle. During the first development phases, prediction tools of the acoustic performance are required to assess in the design process. A combination of numerical and experimental data provides a good compromise between accuracy and modeling effort. A key part of the airborne noise transmission chain are the different passive acoustic treatments applied to minimize the noise impact. These treatments usually include one or more layers of poroelastic media. They exhibit a highly dissipative behavior, making them suitable as noise barriers but, at the same time, complex to model. This article aims to identify the parameters that define the appropriate numerical modeling approach for vibroacoustic systems with poroelastic acoustic packages. Two different concepts for the noise reduction based on poroelastic materials have been investigated, namely the insulation through a spring–mass component and the absorption of a porous layer. The essential principles of the theory of poroelasticity are recalled and three material formulations are derived. The application range of each material model is examined with the help of two configurations: a flat plate and a simplified model of a vehicle front end. The acoustic response of the system is solved with the help of the finite element method using the different material formulations for the description of the poroelastic layers, and the results are compared to measurements conducted in a window test bench. Finally, the main findings are summarized and recommendations towards a more realistic representation of the complete transmission chain are presented.
      PubDate: 2019-09-10
      DOI: 10.1007/s41104-019-00051-z
       
  • Turbocharging of engines with low cylinder numbers: a thermodynamic
           consideration

    • Free pre-print version: Loading...

      Abstract: In the present investigation, the influence of the number of cylinders on the turbocharger and the pumping losses were determined by extensive simulations in combination with experimental investigations. The turbine efficiency is influenced by the different pulsations as a function of the number of cylinders. In addition, another very serious influence of the number of cylinders on the pumping losses has been found. This effect depends strongly on the exhaust volume before turbine, which is why the topic of constant pressure and pulse turbocharging must be considered in detail. It has been found that a smaller number of cylinders (\(<4\)) has higher pumping losses in principle, even with the same turbocharger efficiencies. The lowest pumping losses can be achieved with four-cylinder engines. It has also been shown that this issue is completely different for diesel and gasoline engines.
      PubDate: 2019-07-29
      DOI: 10.1007/s41104-019-00048-8
       
  • Active torsional vibration reduction: potential analysis and controller
           development for a belt-driven 48 V system

    • Free pre-print version: Loading...

      Abstract: Modern internal combustion engines (ICE) reach higher peak pressure thanks to the improved thermodynamic processes and charging technologies. Passive vibration damping approaches face challenges motivating the application of active methods. Active torsional vibration reduction achieves reduced torsional oscillations using the compensation torque generated by an electric traction machine (ETM). 48 V-based hybridization is gaining increased attention as an intermediate step towards higher levels of powertrain electrification. This trend opens new challenges for active vibration reduction with non-inline integration of the ETM using belt drive systems. We analyze the available potential for active torsional vibration attenuation in such belt drive systems in combination with a 48 V belt-driven starter generator (BSG). The study shows that a dual-mass flywheel (DMF) with a centrifugal pendulum absorber can be replaced by a simplified DMF with active vibration reduction using the 48 V BSG system. The effectiveness of active vibration reduction depends on the control functionality. In this contribution, we present an adaptive controller which does not require sensors for reference signal measurement. Besides simulative analysis, the performance of the proposed controller is demonstrated on the experimental test setup with a 2-cylinder ICE and an ETM in an inline configuration.
      PubDate: 2019-07-29
      DOI: 10.1007/s41104-019-00049-7
       
  • Fully coupled control of a spark-ignited engine in driving cycle
           simulations

    • Free pre-print version: Loading...

      Abstract: The fuel consumption of vehicles with spark-ignited (SI) gasoline engines in transient driving cycles depends greatly on the thermodynamics and its interplay with the calibration of the engine control. For the simulation of these complex phenomena covering engine physics and applied control, a new methodology is presented. A functional model of the engine control unit is introduced together with a driver control. It is coupled to a physical modeling framework consisting of a crank angle-based engine model and a vehicle drivetrain model. As a key feature, a novel predictive SI combustion sub-model is integrated, using quasi-dimensional modeling approaches for flame propagation, turbulence, and ignition delay. In a modular validation process, each sub-model and its interaction in the coupled simulation environment are evaluated successfully. The fully coupled model is then used to predict the fuel consumption in driving cycles under varying calibration strategies of the engine control.
      PubDate: 2019-07-13
      DOI: 10.1007/s41104-019-00050-0
       
  • Control allocation for all wheel drive sports cars with rear wheel
           steering

    • Free pre-print version: Loading...

      Abstract: The increasing demands for driving comfort and driving dynamics lead to the introduction of a variety of control systems in modern vehicles. So far, these systems are working in peaceful coexistence and do not use potential synergies. This paper presents a modular control allocation, which combines lateral torque distribution at the rear axle, longitudinal torque distribution, and rear wheel steering. The previous investigations of torque vectoring mostly neglected the secondary yaw torque, which is a result of the dependency between lateral and longitudinal forces at the tyres. An increase in longitudinal forces leads to a decrease in lateral forces and, therefore, results in a yaw torque. A comprehensive vehicle and tyre model is used to analyze this secondary effect for different vehicle states and requested yaw torque. The investigation shows that the influence of the secondary yaw torque varies heavily depending on the vehicle state and the requested yaw torque. Especially, for stabilizing torque requests at high lateral acceleration, the secondary effect is significant and should not be neglected. The investigation shows that an optimal distribution for each yaw torque request exists and that results in maximum lateral forces and thereby maximum lateral acceleration. These results are used within the paper’s modular control allocation. A model-based reference generator delivers desirable yaw rates and side slip angles, which are transferred into necessary lateral forces at the wheels by the control allocation unit. This force-based approach enables modular expandability and usability across multiple vehicles. The proposed controller shows that using the available systems in conjunction helps to increase driving performance and the vehicles stability at the same time.
      PubDate: 2019-06-12
      DOI: 10.1007/s41104-019-00047-9
       
  • Dimensionality reduction and identification of valid parameter bounds for
           the efficient calibration of automated driving functions

    • Free pre-print version: Loading...

      Abstract: The industrialization of automated driving functions according to level 3 requires an efficient test and calibration concept to deal with an increased complexity, growing customer demands, and a larger vehicle fleet offered. Therefore, a method for a complexity reduction of the calibration parameter space is presented. In the two-step approach, a qualitative sensitivity analysis is used to identify valid regions in the search space and subsequently decrease dimensionality based on the parameter-specific global influences. The reduced parameter space and sensitivity information can then serve as a starting point for an efficient calibration process on the target hardware. To examine the method’s potential, our approach is applied to the parameter space of an automated driving function. The results expose clear dependencies between parameters and driving scenarios and allow an exclusion of parameter space dimensions based on sensitivity values. The predefined search space can be narrowed down to valid regions using the parameter range identification approach. Finally, the findings are validated with a quantitative variance-based sensitivity analysis. The validation confirms that our method provides equivalent results with a comparably smaller number of system evaluations.
      PubDate: 2019-06-01
      DOI: 10.1007/s41104-019-00043-z
       
  • Evaluation of transmission losses of various Dedicated Hybrid Transmission
           (DHT) with a lossmap-based simulation model

    • Free pre-print version: Loading...

      Abstract: This paper presents a simulation methodology developed at the Institute of Automotive Engineering (IAE). With this simulation method, transmission lossmaps can be calculated for Dedicated Hybrid Transmission (DHT). These transmission lossmaps are considered within the control strategy section of a modular simulation model, which can lead to more realistic simulation results. Four DHT concepts are investigated using this simulation methodology: three multi-mode DHT (MM-DHT) transmission concepts and a Power Split DHT (PS-DHT) concept. All concepts have two electric machines (EM). The first concept is a MM-DHT, which was developed with the transmission synthesis of the IAE. This DHT concept has two planetary gear sets (PGS), four shifting elements, and two EM. The other MM-DHT concepts are based on the Voltec 2 and the CT6. They also have two EM. The Voltec 2 has two PGS and three shifting elements. The CT6 has three PGS and five shifting elements. The power split DHT has one PGS and no shifting elements. For the evaluation of the transmission concepts, consistent and representative performance requirements are first defined, which must be fulfilled by all concepts. Afterwards, the transmission losses of the individual concepts can be subdivided via the lossmap-based simulation model for the different loss components. Finally, the DHT concepts are examined and evaluated with regard to mechanical efficiency and fuel consumption in the WLTC.
      PubDate: 2019-06-01
      DOI: 10.1007/s41104-019-00041-1
       
  • Evaluation of active Drivesticks as alternative controls in a high
           fidelity driving simulator

    • Free pre-print version: Loading...

      Abstract: The developments in Steer-by-Wire Systems allow for the re-thinking of the commonly known steering system meaning both the development of new controls replacing the steering wheel as well as the design of the feedback corresponding to inform the human driver about the vehicle state. By conducting a user study in a high fidelity driving simulator this paper investigates the quality of vehicle stabilization performed via Active Drivesticks as alternative controls in comparison to the conventional steering wheel in a high-speed scenario. On a subjective level, assessed driving pleasure, experienced comfort and usability were high. Still, the subjective evaluation of safety feeling, experienced stress as well as necessary effort, was in favor of the conventional steering wheel, which subjects have been using over many years of driving. In addition, objective driving state variables that were measured to assess the participants’ performance in controlling the target path show a slight advantage for the classical steering control. In conclusion, it could be shown that despite the difference in experience and training with the different controls, the vehicle stabilization performed via Drivesticks is almost as good as the one performed via the conventional steering wheel in a high-speed driving scenario.
      PubDate: 2019-06-01
      DOI: 10.1007/s41104-019-00039-9
       
  • Study of system layouts for road wetness quantification via tire spray

    • Free pre-print version: Loading...

      Abstract: Wet roads lower the tire traction and, hence, increase the risk of accidents. The exact friction coefficient between tire and road depends on a variety of influences, one of them being the road wetness or water height. To support drivers and autonomous systems in safe guidance of the vehicle, information about road wetness is helpful. In this paper, we discuss different system layouts of how to estimate the current road wetness, focusing on acceleration sensors in the front wheel arches or on the side skirts that measure tire spray. In addition, we analyze a new method that uses sensors at the underbody of the vehicle. We provide information on tire spray behavior, sensor types, and positioning. Our results show that underbody sensors are suited to detect especially high levels of road wetness that are associated with the risk of hydroplaning. In the conclusions, we combine the knowledge of new and known findings to provide a recommendation for the optimal system layout for road wetness quantification via tire spray.
      PubDate: 2019-06-01
      DOI: 10.1007/s41104-019-00044-y
       
  • Flame transport in a heavy-duty diesel engine

    • Free pre-print version: Loading...

      Abstract: A heavy-duty diesel engine has been constructed to provide full optical access to the piston bowl with a window forming the bottom of the “optical” piston. The engine is operated up to 1400 rpm, with peak firing pressure of up to 160 bar and IMEP levels of up to 20 bar. Fuel injection is accomplished with a common rail system and an externally driven high-pressure pump. Data were taken for cylinder pressure with synchronous recording of diesel flame ignition and combustion by means of a high-speed camera. The task of the project summarized in this paper was to evaluate flame and cylinder pressure data gained in this engine at part load and high-load operation. The focus of data evaluation was on identifying main flame transport mechanisms and relating them to simultaneously recorded rates of heat release.
      PubDate: 2019-06-01
      DOI: 10.1007/s41104-018-0037-9
       
  • Derivation of scaled design premises for future vehicle concepts based on
           a forecast of travel demand using the example of a commercial fully
           automated on-demand fleet

    • Free pre-print version: Loading...

      Abstract: This paper presents an approach for linking the vehicle concept design in the early phase of development with findings from the forecast of mobility behavior under the boundary conditions of a future scenario for Germany. The focus is on an objective and data-based methodology for the derivation of design premises for vehicle concepts, illustrated by using the example of a commercial fully automated on-demand fleet. Today, vehicle concepts are designed on the basis of technical premises derived from the customer requirements of the relevant target group determined by market research and the competitive comparison. Technological trends (e.g., fully automated driving) and business model innovations (e.g., mobility as a service) have the potential to change the individual mobility behavior of users significantly so that today’s vehicle concepts will no longer meet the future requirements. Thus, the conventional approach of determining design premises for vehicle concepts alone may no longer be appropriate. Therefore, as the starting point of the overall methodology, the future mobility behavior is simulated in an aspatial travel demand model. By converting the simulated mobility behavior into relevant design premises and using a cluster analysis adapted for the specific application case, total vehicle concepts are objectively derived and optimized regarding the coverage of mobility needs. The concepts are scaled taking technical concept leaps into account. This application example shows that almost 85% of urban autonomous car sharing trips can be covered using a vehicle concept with significantly reduced requirements. Based on the scaled vehicle portfolio and the respective relevance of covering mobility needs, a recommendation for an efficient fleet design can be made.
      PubDate: 2019-06-01
      DOI: 10.1007/s41104-019-00042-0
       
  • Exergy analysis of the thermal behavior of battery cooling processes for
           HEV and BEV applications

    • Free pre-print version: Loading...

      Abstract: This paper presents the results of a holistic exergy analysis of the cooling circuits for HEV and BEV battery cooling systems. The aim of the performed analysis is to give a proposal for the best possible thermohydraulic solution of the cooling system for battery units. The exergy analysis helps to detect possibilities to improve thermal processes and systems. Exergy is defined as the maximum useful work possible during a reversible process that brings the system into equilibrium with the local ambient parameters. The exergy analysis can help to establish a quality rating of counter-clockwise cyclic processes (e.g. air conditioning, heat pump) with a COP value smaller or even greater than 1. Using evaluation coefficients for the hierarchic exergetic analysis (efficiency, loss coefficient, significance factor and loss component), it is possible to identify the maximum potential of each individual component and also of the total cooling system itself. New optimized concepts for the cooling and heating of battery units are proposed by a numerical analysis of the current cooling circuit for selected operation points. The final effect of the proposed solution is an increase of the vehicle cruising range, an increase of the overall vehicle efficiency and finally—a reduction of the lifecycle costs.
      PubDate: 2019-06-01
      DOI: 10.1007/s41104-019-00038-w
       
  • Operation of a diesel engine with intake manifold alcohol injection

    • Free pre-print version: Loading...

      Abstract: The usage of ethanol and two different mixtures of ethanol and gasoline (E85 and E65) was investigated on a modified diesel engine designed to work in a dual-fuel combustion mode with intake manifold alcohol injection. The tests were conducted at five operating points covering low, medium and high load and different engine speeds. Additionally, an engine-process simulation model was built for the test engine and selected operating points from the engine test bed measurements were analysed with it. The discussion of the simulation results allows an efficiency analysis and therefore a better understanding of the findings of the engine test stand experiments. With rising alcohol amount, a significant reduction of soot mass and particle count was observed at all operating points. At some load conditions, substituting diesel with ethanol, E65 or E85 led to a reduction of the NOx emissions; however, the real benefit concerning the nitrogen oxides was introduced by the mitigation of the soot–NOx trade-off. The indicated engine efficiency in dual-fuel mode showed an extended tolerance against high EGR rates. It was significantly improved with enhanced substitution ratios at high loads, whereas it dropped at low loads. Substituting diesel with manifold injected alcoholic fuels impressively reduced the engine CO2 emissions at medium and high load operating points. Degrading combustion quality, irregular combustion phenomena and poor process controllability at low load and knock as well as auto-ignition at high load limited the maximum ethanol energy share to approximately 70% and 30%, respectively.
      PubDate: 2019-06-01
      DOI: 10.1007/s41104-019-00040-2
       
  • Comparative study on the friction behaviour of piston/bore interface
           technologies

    • Free pre-print version: Loading...

      Abstract: Engine crank case designs for passenger car applications are based today on two main material technologies: grey cast iron and an increasing share of aluminium-based concepts. Due to the low wear resistance of aluminium, the latter concepts require a wear protective layer for the cylinder bore surface. Iron-based thermal spray coats are widely used for this purpose. The coating improves the tribological behaviour significantly, as previous studies have shown. Additionally, aluminium-based concepts offer advantages regarding engine weight and thermal management. The aim of the presented work was the discussion of these technological concepts regarding the tribological and sealing properties of the piston/bore interface. The study was carried out based on the AVL FRISC Floating Liner Engine. While the basic engine remained unchanged, the cylinder bore surface was varied. In addition to the floating liner friction measurement, the blow-by and lube oil consumption were also measured. A state-of-the-art multi-body dynamic simulation model complements the experimental study, while both simulation and measurement lead to similar conclusions.
      PubDate: 2019-05-27
      DOI: 10.1007/s41104-019-00045-x
       
  • Charge temperature evaluation in self-ignition events

    • Free pre-print version: Loading...

      Abstract: A thermodynamic method for the evaluation of charge “parcel” temperatures at the moment of self-ignition in SI engines has been applied to a series of combustion cycles which were ignited by pre-ignition events. The temperature evaluation method is based on measurement of the degree crank angle at which the rate of heat release surpasses the background noise level and numerical integration of the Livengood–Wu integral with ignition delay relations based on Arrhenius’ parameters for activation energy, temperature and pressure. A key variable of this method is the temperature “history” prior to self-ignition as such temperature history controls the heat input into the reactive gas. Results of the method, thus, provide a means to discuss pre-ignition events in view of potential root causes for charge heating including compression heating enhanced by hot spot heat transfer, the influence of intake air temperature or further mechanisms or sources of heat input.
      PubDate: 2019-05-23
      DOI: 10.1007/s41104-019-00046-w
       
  • Editorial

    • Free pre-print version: Loading...

      PubDate: 2018-12-01
      DOI: 10.1007/s41104-018-0036-x
       
  • Corrosion resistance of brazed aluminum in ethanol/water mixtures at high
           temperatures

    • Free pre-print version: Loading...

      Abstract: This study investigated the corrosion of aluminum in various ethanol/water mixtures. It has been shown that a critical corrosion temperature exists at which a sudden exothermic corrosion occurs. This critical corrosion temperature is dependent on presence of water and increases with increasing water concentration. This corrosion is independent of the atmosphere. Furthermore, it was demonstrated that denaturants in ethanol with a carbonyl group will further increase the critical corrosion temperature. This increase is due to a reaction of water and carbonyl to carbonyl-hydrate which reacts with the aluminum oxide surface forming a passivation layer. The critical corrosion temperature has been defined by the reaction of aluminum with ethanol. Thereby, the same energy is always released, independent of the water concentration. However, the presence of water influences the activation energy of this reaction. The observed corrosion of aluminum depends on the exposed surface area. Consequently, with increasing surface area, a higher statistical failure rate is observed. This is most likely due to defects in the passivation layer of aluminum.
      PubDate: 2018-12-01
      DOI: 10.1007/s41104-018-0035-y
       
  • Method development to analyse the vertical and lateral dynamic
           road–vehicle interaction of heavy-duty vehicles

    • Free pre-print version: Loading...

      Abstract: Full vehicle simulations and in this context utilized tyre models play in many ways a key role to analyse the vehicle–road interaction. The tyre model requirements are conflicting: on the one hand, the quality of the simulation results is of great significance; on the other hand, the calculation effort increases with the increasing complexity of the model. In this field of research, the DFG Research Group FOR 2089 “Durable pavement constructions for future traffic loads” develops a new modelling approach to depict and analyse dependencies of the road–tyre interaction to increase the simulation quality of road load impacts. Because of high static and dynamic wheel loads of commercial vehicles (CV), these are decisively responsible for the vehicle-induced road load stresses. The high diversity in this vehicle class causes an extreme complexity for modelling and simulating the road load stress using multi-body simulation models. To enable an efficient methodology, a modular and scalable modelling approach for different commercial vehicle classes has been developed. Various vehicle components have been depicted as either rigid or flexible bodies. The result of this research gives an indication of the influence of the level of detail of modelling different components on the calculated wheel loads and the lateral vehicle behaviour. Special focus has been put on the tyre modelling approach. Mathematical tyre models are often used in vehicle dynamics simulations, but due to the simplified assumption of a point contact between the tyre and the road, they reflect the real road load inaccurately. The road–tyre interaction has a big influence on vehicle dynamics (Winkler in Efficient MBS-modelling of commercial vehicle for vertical dynamics simulations and handling simulations, chassis.tech.plus 2016, München, 2016); therefore, it is necessary to reproduce the contact area more accurately. Using a physical tyre model, the tyre–road interaction can be analysed, since this model simulates a pronounced contact patch and enables to analyse the contact pressure distribution. Supported by high-resolution road surface measurements, a methodology has been developed to examine the tyre force transmission potential in the contact patch. Effects of the high-resolution approach on vehicle dynamics have been investigated in order to give valuable input for the sizing and specification of road construction.
      PubDate: 2018-12-01
      DOI: 10.1007/s41104-018-0034-z
       
 
JournalTOCs
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Email: journaltocs@hw.ac.uk
Tel: +00 44 (0)131 4513762
 


Your IP address: 35.175.107.77
 
Home (Search)
API
About JournalTOCs
News (blog, publications)
JournalTOCs on Twitter   JournalTOCs on Facebook

JournalTOCs © 2009-