AMT gear shifting process control method

A technology of process control system and gear shifting motor, which is applied in the direction of control drive, control device, transmission device control, etc. It can solve the problems of combined gear shift top teeth, long control time, and long shifting time, so as to improve the overall vehicle performance. The effect of power performance, shortened shift time, and cost reduction

Active Publication Date: 2020-04-03
BIT INTELLIGENT VEHICLE TECH CO LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For the AMT products of new energy vehicles, the TCU is generally used to control the shift motor to drive the shift actuator to control the shift process. The traditional control method is to use the PID control method to perform closed-loop tracking of the shift displacement to output a reasonable PWM duty. Compared with controlling the shifting motor, due to the hyster

Method used

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  • AMT gear shifting process control method
  • AMT gear shifting process control method

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Embodiment 1

[0025] The minimum carrier architecture of the control method is as figure 1 As shown, it includes two independent control units - TCU (AMT controller) and MCU (motor controller). The TCU is connected to the shift motor through the wire harness. The shift motor is installed on the shift actuator. The driving motor is connected, and the data transmission and command transmission are carried out between the TCU and the MCU through the CAN bus.

[0026] The control method adopts the following steps:

[0027] Step 1. The driver drives the vehicle to drive normally by manipulating the accelerator pedal and the brake pedal;

[0028] Step 2. During normal driving, the TCU continuously judges whether to update the target gear according to the collected signals such as vehicle speed, accelerator pedal opening, and vehicle acceleration;

[0029] Step 3. When the target gear is updated, the TCU sends a torque unloading command to the MCU, and then judges whether the drive motor torque ...

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Abstract

The invention discloses an AMT gear shifting process control system and method. The system comprises two independent control units, namely a TCU and an MCU, the TCU is connected with a gear shifting motor, the gear shifting motor is installed on a gear shifting executing mechanism, the MCU is connected with a driving motor, and data transmission and instruction transmission are conducted between the TCU and the MCU through a CAN bus; the TCU continuously judges whether to update the target gear or not according to the collected signals including the vehicle speed, the accelerator pedal openingdegree and the vehicle acceleration; and the TCU sends a torque unloading instruction, a free mode instruction, a speed regulation instruction, a random torque control instruction and a torque loading instruction to the MCU, and sends a non-control instruction. Active torque control is carried out on the gear shifting motor in the gear disengaging and engaging stages in the gear shifting process,precise positioning of the gear shifting executing mechanism is achieved, and meanwhile the PI control algorithm is assisted to improve the gear engaging success rate and the whole vehicle dynamic property.

Description

technical field [0001] The technical field of vehicle power system control, specifically relates to an AMT (Automatic mechanical transmission) shift process control method compatible with pure electric and hybrid systems. Background technique [0002] For the AMT products of new energy vehicles, the TCU is generally used to control the shift motor to drive the shift actuator to control the shift process. The traditional control method is to use the PID control method to perform closed-loop tracking of the shift displacement to output a reasonable PWM duty. Compared with controlling the shifting motor, due to the hysteresis response of the shifting actuator itself, the whole shifting control time is longer; in addition, in order to further reduce costs, AMT gearboxes began to adopt the shifting method without synchronizers, that is, changing to the form of a combination sleeve, and Combining gear shifting is prone to the phenomenon of top teeth, resulting in long shifting tim...

Claims

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Application Information

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IPC IPC(8): B60L15/20F16H61/02F16H61/18
CPCB60L15/2054B60L2240/12B60L2240/14B60L2240/423F16H61/0202F16H61/18Y02T10/72
Inventor 张瑞捷胡宇辉彭建鑫刘贤强徐梦天胡宇涛
Owner BIT INTELLIGENT VEHICLE TECH CO LTD
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