Development of Smooth Shift Control System with Output Torque Estimation

Ibamoto, Masahiko; Kuroiwa, Hiroshi; Minowa, Toshimichi; Sato, Kazuhiko; Tsuchiya, Takeshi

doi:10.4271/950900

Cited by 26 publications

(11 citation statements)

References 2 publications

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“…Though torque sensor is not assembled in automatic transmission, torque estimation technology is researched by [7] based on engine and torque converter characteristics, so the estimated turbine torque can be used to enhance the tracking performance.…”

Section: A Clutch Slip Controller Designmentioning

confidence: 99%

Integrated Powertrain Control of Gearshift for Automatic Transmission

Gao

Liu

2010

2010 First International Conference on Pervasive Computing, Signal Processing and Applications

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In this paper, an integrated powertrain control of gearshift for automatic transmission is developed: engine control by torque regulation is incorporated to suppress the shock of output shaft torque, whilst a clutch slip controller is applied to transfer the engine torque to driveline system, which is aimed to regulate clutch slip speed. The proposed approach ensure the powertrain system stable, and the shift time can be controlled by clutch slip controller even if with the absence of engine control. At last, taking 1-2 upshift for example, simulation results are presented and discussed in the final chapter of this paper.

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Section: A Clutch Slip Controller Designmentioning

confidence: 99%

Integrated Powertrain Control of Gearshift for Automatic Transmission

Gao

Liu

2010

2010 First International Conference on Pervasive Computing, Signal Processing and Applications

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“…Although the torque converter transfers the engine power to the gearbox and the turbine torque plays an important role in the turbine speed tracking control, the torque sensor is generally not available in an automatic transmission. However, torque estimation technology is researched [12] based on engine and torque converter characteristics, so the estimated turbine torque can be used to enhance the tracking performance.…”

Section: Control-oriented Modelmentioning

confidence: 99%

Robust clutch slip controller design for automatic transmission

Gao

Zheng

2011

Proceedings of the Institution of Mechanical Engineers, Part D:

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To improve the drivability of vehicles with automatic transmissions, a closed-loop turbine speed controller for the inertia phase of the gear shift is designed. Since the system must be robust to the changes in the operating conditions and any deterioration in the automatic transmission fluid (ATF) and the friction material, a robust approach should be used to obtain acceptable performance, even for the worst case. Moreover, as it is known that the change of turbine torque in the inertia phase greatly affects the turbine speed tracking performance, it is important and necessary to suppress the tracking error from the influence of turbine torque. In this paper, based on a linearized model derived from the dynamics of a vehicle powertrain, a two-degree-of-freedom (2DOF) robust proportional-integral-differential (PID) controller is discussed, considering the uncertainties of the proposed model. The estimated turbine torque is used in the feedforward channel to enhance the disturbance rejection performance, while the feedback channel ensures that the system is quadratically stable under various operating conditions and friction characteristics. In this study, MATLAB is utilized as the programming environment, and the powertrain system is analysed in the control-oriented sense. The proposed controller is validated by the simulation of 1-2 upshift.

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“…[7][8][9][10] Coordinated clutch control and engine control further upgrade the shift quality of power-on upshifts. To save and ease calibration labour, Ibamoto et al 11 developed a tuning-free smooth shift control system based on simultaneous real-time output torque estimation, line pressure control and ignition timing control with no predetermined look-up tables. This control system was effective in reducing the torque overshoots during upshifts while maintaining the shift periods similar to those of the conventional look-up control system.…”

Section: Introductionmentioning

confidence: 99%

Motor-torque-limited power-on upshift control in electric vehicles with automatic transmissions

Chen

Liu

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part D:

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The power-on upshift control in automatic transmissions has a significant effect on the shift quality and is very complex. This paper aims to investigate the relationship between the limited motor torque control and the performance of the power-on upshift control in electric vehicles. First, a simplified model for an electric vehicle powertrain with a general two-speed automatic transmission was built. Then, a power-on upshift control strategy was introduced into the powertrain model, with the aim of a constant output torque during power-on upshifts. The control strategy fully utilized the control flexibility of electric motors and specifically focused on the effects of the limited motor torque control during power-on upshifts. Simulation results demonstrated that the proposed control strategy could significantly improve the shift quality of electric vehicles under mild driving conditions. However, the performance of the proposed control strategy under aggressive driving conditions was impaired by the limited motor torque control. An effective solution was proposed to improve the performance of the power-on upshift control under aggressive driving conditions. This work may be helpful to improve the shift quality of both electric vehicles and internal-combustion engine vehicles with automatic transmissions.

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Development of Smooth Shift Control System with Output Torque Estimation

Cited by 26 publications

References 2 publications

Integrated Powertrain Control of Gearshift for Automatic Transmission

Integrated Powertrain Control of Gearshift for Automatic Transmission

Robust clutch slip controller design for automatic transmission

Motor-torque-limited power-on upshift control in electric vehicles with automatic transmissions

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