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Control method and control system of electronic-control mechanical type automatic transmission of pure electric vehicle

An automatic transmission and control system technology, which is applied in the field of pure electric vehicle transmission system control and vehicle transmission system control, can solve problems affecting driving safety and driver fatigue, increase reliability and stability, and reduce shifting impact , ingeniously designed effects

Inactive Publication Date: 2014-04-02
SHANGHAI ZHONGKE SHENJIANG ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For multi-speed manual transmission, due to frequent shifting operations, it is easy to make the driver tired and affect driving safety; and different driving skill levels have a greater impact on the economy, power and ride comfort of the vehicle

Method used

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  • Control method and control system of electronic-control mechanical type automatic transmission of pure electric vehicle
  • Control method and control system of electronic-control mechanical type automatic transmission of pure electric vehicle
  • Control method and control system of electronic-control mechanical type automatic transmission of pure electric vehicle

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Embodiment Construction

[0043] In order to understand the technical content of the present invention more clearly, the following examples are given in detail.

[0044] During the driving process of the pure electric vehicle, the power output of the drive motor is directly connected to the drive axle through the transmission without passing through the clutch, so as to realize clutchless gear shifting. The driver controls the vehicle through the shift handle, accelerator pedal and brake pedal, while the shift process of the transmission is automatically executed by the vehicle according to the state parameters such as vehicle speed and accelerator.

[0045] See figure 1 as shown, figure 1 It is a flowchart of a control method for an electronically controlled mechanical automatic transmission of a pure electric vehicle.

[0046] In step 101, the system is initialized, mainly including function port configuration, underlying driver and interface function writing.

[0047] In step 102, the position of...

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Abstract

The invention relates to a P-gear control method of an electronic-control mechanical type automatic transmission of a pure electric vehicle, comprising the following steps of: a, detecting the position of a gear shift handle and vehicle speed; b, when the gear shift handle is positioned at the P gear and the vehicle speed is lower than a preset value, shifting to a neutral position; and c, locking the P gear. Preferably, in the step b, a synchronizer is driven to shift to the neutral position by rotating a shift motor and driving a transmission device to drive a shift fork; and in the step c, a P gear motor rotates and the transmission device drives a pawl to lock a ratchet wheel fixed with the input shaft of the transmission so as to lock the input shaft of the transmission and realize parking braking. The invention also provides a D gear control method and a correlative control system. The invention enhances the reliability and the stability of the parking braking of the electric vehicle, can also realize the automatic and stable gear shift of the transmission, reduce the gear shift impact, increase the dirigibility and riding comfortableness of the electric vehicle and sufficiently develop the efficiency of the motor, has ingenious and reasonable design and is suitable for large-scaled popularization and application.

Description

technical field [0001] The invention relates to the technical field of vehicle drive system control, in particular to the technical field of pure electric vehicle drive system control, and specifically refers to a control method and control system for an electronically controlled mechanical automatic transmission of a pure electric vehicle. Background technique [0002] Electric vehicles are low-noise, zero-emission, comfortable and clean, and easy to operate and maintain. They are the only way for automobiles to achieve automation and intelligent development, and they are the fundamental choice for the sustainable development strategy of the automobile industry. The most ideal and most promising green transportation. [0003] At present, most of the parking brakes of automobiles are friction brakes on the rear wheels, the braking force is relatively small, and the wheels cannot be completely locked. Especially when the electric vehicle is parked on a slope, the friction pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W10/10B60W10/08B60W40/10B60W10/11
Inventor 袁一卿陈阳伍国强
Owner SHANGHAI ZHONGKE SHENJIANG ELECTRIC VEHICLE
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