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Modeling and Analysis of Engine Torque Modulation for Shift Quality Improvement
Technical Paper
2006-01-1073
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
An engine torque modulation methodology is developed for use in engines equipped with electronic throttle control, ETC. It is shown through simulation that an engine with ETC is capable of following a transmission torque modulation command that includes a linearly increasing torque during the torque phase, a torque reduction during the inertia phase and a post-shift torque increase. It is also shown that such a strategy can be used to minimize the transmission output torque variation during a shift. The impact of engine indicated mean effective pressure, IMEP, variation on vehicle longitudinal acceleration is analyzed using Monte-Carlo simulation. It is shown that the IMEP induced variation in the vehicle acceleration is largely due to end of shift engine torque output timing errors. It is then recommended that during a shift the engine IMEP variation be held to a one-sigma variation of three percent or less. Appendices A and B summarize the derivation of a low order planetary gear driveline model that is used to illustrate the torque relationships and dynamics associated with shifting an automatic transmission.
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Citation
Gibson, A. and Kolmanovsky, I., "Modeling and Analysis of Engine Torque Modulation for Shift Quality Improvement," SAE Technical Paper 2006-01-1073, 2006, https://doi.org/10.4271/2006-01-1073.Also In
References
- Sun, Z. Hebbale, K 2005 “Challenges and Opportunities in Automotive transmission control,” American control Conference Proceedings 3284 3289
- Butts, K. Hebbale, K. Wang, K. 1991 “Acceleration based Control of Power-On Clutch-to-Clutch Upshifting in an Automatic transmission,”
- Fujii, Y. Hrovat, D. et. al. 2004 “Ratio Shift Control for a Multiple Ratio Automatic Transmission,”
- Heywood, J. 1988 Internal Combustion Engine Fundamentals McGraw-Hill New York, NY
- Gibson, A.O. Kolmanovsky, I.V. 2003 “Modeling Positive Intake Valve Overlap Air Charge Response in Engines,” American Control Conference Proceedings Denver
- Deur, J. Asgari, J. Hrovat, D. 2003 “Modeling of an Automotive Planetary Gear Set Based on Karnopp model for Clutch Friction,” Proceedings of IMECE2003 Nov. 15-21
- Fujii, Y. et. al. 2003 “Review of Wet Friction Component Models for Automatic Transmission Shift Analysis,” SAE # 2003-01-1665
- Horste, K. 1995 “Objective Measurement of Automatic Transmission Shift Feel Using Vibration Dose Value,” SAE # 951373