Shift Characteristics of a 4-Speed Automatic Transmission

Megli, Thomas W.; Haghgooie, M.; Colvin, Dan

doi:10.4271/1999-01-1060

Cited by 30 publications

(15 citation statements)

References 2 publications

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“…These models often tend to be numerically stiff and/or computationally intensive to run in RT using a fixed time-step integrator. Megli et al [3] present the details of the development of a TIL experimental platform at Ford, but a real engine was used to drive the transmission while wheel-slip was not considered. Steiber et al [4] and Castiglione et al [5] describe the engine model for a TIL test-system developed for General Motors but the model was largely empirical and its validation was not presented.…”

Section: Introductionmentioning

confidence: 99%

On emulating engine and vehicle transient loads for transmission-in-the-loop experiments

Ahlawat¹,

Jiang²,

Medonza³

et al. 2012

Mechatronics

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Section: Introductionmentioning

confidence: 99%

On emulating engine and vehicle transient loads for transmission-in-the-loop experiments

Ahlawat¹,

Jiang²,

Medonza³

et al. 2012

Mechatronics

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“…These models often tend to be numerically stiff and/or computationally intensive to run in RT using a fixed time-step solver. Megli et al [3] present the details of the development of a TIL experimental platform at Ford, but a real engine was used to drive the transmission while wheel-slip was not considered. Steiber et al [2] and Castiglione et al [4] describe the engine model for a TIL test-system developed for General Motors but the model was completely empirical and its validation was not presented.…”

Section: Introductionmentioning

confidence: 99%

Engine torque pulse and wheel slip emulation for transmission-in-the-loop experiments

Ahlawat

Jiang²,

Medonza³

et al. 2010

2010 IEEE/ASME International Conference on Advanced Intelligent Mechatronics

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This paper presents the development of real-time (RT) engine and vehicle models for transmission-in-the-loop (TIL) experiments. In this TIL experimental setup, the input side of the transmission is controlled by a dynamometer emulating the engine, whereas the output sides of the transmission are controlled by two dynamometers emulating the wheels. The models emulating these vehicle-components are required to possess sufficient fidelity to simulate engine torque pulse (ETP) and wheel-slip dynamics while being computationally efficient to run in RT. The engine and tire models available in the literature that accurately capture these dynamics are often computationally intensive and not suited for RT simulation. This paper presents the modeling details of a RT semi-empirical engine model and a physics based tire model, capable of accurately emulating the desired dynamic loads for the TIL experiments. Parameters of the engine model are identified using experimental data, and both the models are validated in pure simulation. Finally, open and closed loop test results are presented to demonstrate successful emulation during the TIL experimentation.

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“…Its function is to ensure normal work of transmission system, to control shifting and the shifting process of transmission system [1−2]. To match the characteristics of oil pressure and volume flow can not only prolong the working life of shift elements and AT, but also effectively decrease the power loss of the shifting process to ensure the acceleration performance of the car, as well ensure the quality of shifting [3]. By analyzing the dynamic process of hydraulic system, every kinematic and kinetic process of each element in the hydraulic system can be known [4].…”

Section: Introductionmentioning

confidence: 99%

Design and dynamic simulation of hydraulic system of a new automatic transmission

Wang

Liu

et al. 2009

J. Cent. South Univ. Technol.

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A new hydraulic system of a novel automatic transmission (AT) was designed. The dimension and structure of valves and cylinders were designed by theoretical calculation. The dynamic simulation model of hydraulic system of AT was established by ITI-SimulationX. Simulation results and theoretical design results were compared to confirm the simulation model. Based on the confirmed simulation model, the simulation results of pressure and flow of the hydraulic system were analyzed. The dynamic simulation method is very helpful for designing and analyzing the performance of hydraulic system and further optimization design. The theoretical design method and dynamic simulation model are feasible for the real industrial applications. The research results can be used in hydraulic system design and optimization.

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Shift Characteristics of a 4-Speed Automatic Transmission

Cited by 30 publications

References 2 publications

On emulating engine and vehicle transient loads for transmission-in-the-loop experiments

On emulating engine and vehicle transient loads for transmission-in-the-loop experiments

Engine torque pulse and wheel slip emulation for transmission-in-the-loop experiments

Design and dynamic simulation of hydraulic system of a new automatic transmission

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