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Wheel Torque-Based Control: Transmission Input Torque Determination and Inertia Compensation
Technical Paper
2022-01-0733
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Traditionally, the controls system in production vehicles with automatic transmission interprets the driver’s accelerator pedal position as a demand for transmission input torque. However, with the advent of electrified vehicles, where actuators are located at different positions in the drivetrain, and of autonomous vehicles, which are self-driving, it is more convenient to interpret the demand (either human or virtual) in vehicle acceleration or wheel torque domain. To this end, a Wheel Torque-based longitudinal Control (WTC) framework was developed, wherein demands can be converted accurately between the vehicle acceleration or wheel torque domain and the transmission assembly input torque domain. For powertrains with a step-ratio transmission and a torque converter (TC), a key challenge of this conversion is the determination of the Inertia Compensation Torque (ICT), which is the torque required to accelerate or decelerate the TC’s impeller when the TC operates in the slipping or open conditions. In the current work, the proposed system computes a target impeller speed, taking into account the states of both the TC (e.g., open, slipping, etc.) and the transmission (i.e., fixed gear or shifting), which is then used to determine this ICT. The developed strategy was baselined against the traditional strategy and was found to be less calibration-intensive and, at the same time, effective in delivering the vehicle acceleration targets.
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Citation
Roy, J., Ravichandran, M., Meyer, J., and Zhao, Y., "Wheel Torque-Based Control: Transmission Input Torque Determination and Inertia Compensation," SAE Technical Paper 2022-01-0733, 2022, https://doi.org/10.4271/2022-01-0733.Also In
References
- Kuwahara , S. , Kubonoya , H. , Mizuno , H. , Kaigawa , M. et al. Toyota's New Integrated Drive Power Control System SAE Technical Paper 2007-01-1306 2007 10.4271/2007-01-1306
- Bai , S. , Brennan , D. , Dusenberry , D. , Tao , X. et al. Integrated Powertrain Control SAE Technical Paper 2010-01-0368 2010 10.4271/2010-01-0368
- Kim , D. , Peng , H. , Bai , S. , and Maguire , J.M. Control of Integrated Powertrain With Electronic Throttle and Automatic Transmission IEEE Transactions on Control System Technology 15 3 May 2007 P474 P482 10.1109/TCST.2007.894641
- Tokura , T. , Asami , T. , Hasegawa , Y. , Sugimura , T. et al. Development of Smooth Up-Shift Control Technology for Automatic Transmissions with Integrated Control of Engine and Automatic Transmission SAE Technical Paper 2007-01-1310 2007
- Maguire , J. , Peng , H. , and Bai , S. Dynamic Analysis and Control System Design of Automatic Transmissions SAE 2013
- Cairano , D. , Stefano , J.D. , Kolmanovsky , I.V. , and Hrovat , D. Model Predictive Control of Engine Speed During Vehicle Deceleration IEEE Transactions on Control Systems Technology 22 6 2014 2205 2217