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Gear position control method and system for two-speed gearbox

A control method and reduction box technology, which is applied in the field of vehicles, can solve the problems of being unable to give power to the vehicle, unable to meet the power requirements of the driver, and having few control strategies for the two-speed reduction box.

Active Publication Date: 2022-03-15
GREAT WALL MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most electric or hybrid vehicles use a single-speed electric axle gearbox with a fixed speed ratio. In the four-wheel drive mode, the single-speed electric axle gearbox is limited by the maximum speed of the motor and cannot give the vehicle more power. In turn, it cannot meet the needs of some drivers with high power requirements
Based on the above reasons, the research and development of two-speed gearboxes suitable for electric or hybrid vehicles has been gradually carried out. However, there are few control strategies for the two-speed gearboxes, and the existing control strategies cannot ensure that the rear axle drive motor is at The optimal working range, which cannot meet the current needs of users

Method used

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  • Gear position control method and system for two-speed gearbox
  • Gear position control method and system for two-speed gearbox
  • Gear position control method and system for two-speed gearbox

Examples

Experimental program
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Embodiment 1

[0031] figure 1 It is a two-speed reduction box gear control method of embodiment 1, such as figure 1 As shown, the method for controlling the gear position of the two-speed reduction gearbox includes:

[0032] S101 , determining a first target gear position of the reduction box reflecting the current driving demand of the user according to the current vehicle speed.

[0033] Among them, in this embodiment, the type of the reduction box is a two-speed reduction box, which has three target gears, which are the neutral gear of the reduction box, the first gear of the reduction box and the second gear of the reduction box, which are different from the present invention. Yes, there is also a single-speed reducer in the prior art. As the name implies, the single-speed reducer is the neutral gear and the first gear of the reducer. Wherein, the first target gear is one of the three gears of the two-speed reducer in the embodiment of the present invention.

[0034] In this step S10...

Embodiment 2

[0064] image 3 It is a block diagram of a two-speed reduction gearbox gear position control system. like image 3 As shown, the two-speed reduction gearbox gear control system includes: a target gear determination unit 1, which is used to determine the first target gear of the reduction gearbox reflecting the current driving needs of the user according to the current vehicle speed; and a gear intervention unit 2, which uses The gear box intervention control is performed based on at least one of the following real-time vehicle operating conditions, so as to switch the first target gear position of the gear box to the second target gear position of the gear box matching the real-time operating conditions of the vehicle: drive gear Lever position information, vehicle drive motor speed, and gearbox gear fault information.

[0065] Preferably, the target gear determination unit 1 includes: a vehicle speed acquisition module 11 for acquiring the current vehicle speed and the curren...

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Abstract

The present invention relates to the technical field of vehicles, and provides a two-speed gear box gear control method, system and vehicle. The two-speed gear box gear control method includes: determining the first target of the gear box that reflects the user's current driving needs according to the current vehicle speed Gear position; and performing gear reduction gear intervention control based on at least one of the following real-time operating conditions of the vehicle, so as to switch the first target gear of the reduction gear to a second target of the gear reducing gear matching the real-time operating conditions of the vehicle Gear position: information on the position of the driving gear lever, the speed of the vehicle drive motor, and the fault information on the gear position of the gearbox. The gear position control method, system and vehicle of the two-speed reduction box of the present invention ensure that the driving motor is in the best working range and meet the current needs of users.

Description

technical field [0001] The present invention relates to the technical field of vehicles, in particular to a method, a system and a vehicle for controlling the gear position of a two-speed reduction box. Background technique [0002] At present, most electric or hybrid vehicles use a fixed-speed single-speed bridge gearbox. In the four-wheel drive mode, the single-speed bridge gearbox is limited by the maximum speed of the motor and cannot provide more assistance to the vehicle. As a result, it cannot meet the needs of some drivers with higher power requirements. Based on the above reasons, the research and development of two-speed gearboxes suitable for electric or hybrid vehicles has been gradually carried out. However, there are few control strategies for the two-speed gearboxes, and the existing control strategies cannot ensure that the rear axle drive motor is in the Optimal working area, thus failing to meet the current needs of users. SUMMARY OF THE INVENTION [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/02F16H61/12F16H59/36F16H59/44F16H59/14
CPCF16H61/0213F16H61/12F16H59/36F16H59/44F16H59/14F16H2061/0223F16H2061/1256F16H2059/366F16H2059/147B60Y2200/91F16H2200/0034F16H59/68F16H59/74F16H61/16F16H2061/0234F16H2061/168
Inventor 魏李康李亚丹黄超杰罗鹏王洪朋
Owner GREAT WALL MOTOR CO LTD
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