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Study of Upshift Control Method by Estimation of Acceleration Waveform

Article of Honda R&D Technical Review Vol.22 No.2


Control that corrects the torque output deviation of shift clutches is required to suppress the shift-shock produced when automatic transmissions up-shift, and enhance product quality. Control technology was developed that serves this purpose by estimating and evaluating the vehicle acceleration waveform generated when shifting, from the variation in output shaft rotations, and then detecting the output deviation of clutch torque and performing learning correction based on that acceleration waveform.


(1) JSAE: Jidoushagijutu Handbook, Vol. 3, Sekkei (powertrain)-hen, p. 246-248 (2005) (in Japanese)
(2) Tokura, T., Asami, T., Hasegawa, Y., Sugimura, T., Kono, K., Aoki, K.: Development of Smooth Up-Shift Control Technology for Automatic Transmissions with Integrated Control of Engine and Automatic Transmission, SAE Paper, 2007-01-1310 (2007)
(3) Najork, R., Steinberg, I.: The GETRAG PowerShift(R) Transmission 6DCT470 (TC-SST) of Mitsubishi Lancer Evolution and Ralliart, JSAE No. 05-08 Symposium, p. 38-43 (2008)
(4) Minowa, T., Ochi, T., Kuroiwa, H., Liu, K.: Smooth Gear Shift Control Technology for Clutch-to-Clutch Shifting, SAE Paper, 1999-01-1054 (1999)
(5) Ibamoto, M., Uchida, M., Kuroiwa, H., Minowa, T., Sato, K.: Transient control of gear shift by means of estimated torque feedback without turbine speed sensor, 1995 JSAE Annual Congress Proceedings, No. 954, p. 57-60

Author (organization or company)

Shintaro KAMEDA(Automobile R&D Center)、Yasushi INAGAWA(Automobile R&D Center)

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