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Smooth Torque Control System Using Differential Value of Shaft Speed
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English
Abstract
An automotive powertrain control system using only one signal of the output shaft speed sensor has been investigated in order to lower the system costs and to simplify the calibration process A new smooth torque method after downshifting is described which is based on the differential value of automatic transmission output shaft speed The starting time of the engine torque control for restraining the torque fluctuation after downshifting can be detected accurately as a result of using the differential value The proposed engine torque control method is advantageous since it simplifies the calibration process for the data tables Moreover, it is possible to lower the cost of parts used in the automatic transmission control since speed and torque sensors are unnecessary The smooth torque control method was examined using a test vehicle and the same smooth torque after downshifting was obtained when the new method was employed
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Authors
Topic
Citation
Minowa, T., Kurata, K., Kuroiwa, H., Ibamoto, M. et al., "Smooth Torque Control System Using Differential Value of Shaft Speed," SAE Technical Paper 960431, 1996, https://doi.org/10.4271/960431.Also In
Transmission and Driveline Systems Symposium: Efficiency, Components, and Materials
Number: SP-1154; Published: 1996-02-01
Number: SP-1154; Published: 1996-02-01
References
- Kono K et al Torque Converter Clutch Slip Control System SAE Paper 950672 1995
- Minowa T et al Smooth Gear Shift Control System Using Estimated Torque SAE Paper 941013 1994
- Ibamoto M et al Development of Smooth Shift Control System with Output Torque Estimation SAE Paper 950900 1995