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A driving force recovery control method, device and 48v drive system

A recovery control and driving force technology, applied in the direction of climate sustainability, road transportation, sustainable transportation, etc., can solve problems affecting taxiing distance, etc., and achieve the effect of reducing time

Active Publication Date: 2021-10-22
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The control method in the prior art needs to realize the control of the clutch and the transmission during the stop coasting phase, and there is additional resistance during the stop coasting process, which affects the coasting distance. There is a certain delay time to drive mode

Method used

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  • A driving force recovery control method, device and 48v drive system
  • A driving force recovery control method, device and 48v drive system
  • A driving force recovery control method, device and 48v drive system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] figure 1 It is the flow chart of the control method in Embodiment 1. This embodiment is applicable to the situation where the driving force of the vehicle is restored when the vehicle is switched from the coasting mode to the driving mode when the vehicle is stopped. way, the device can be configured in electronic equipment, such as in the transmission control unit TCU, such as figure 1 As shown, the method may specifically include:

[0032] S1. Determine the target gear of the transmission, the target speed of the engine and the speed of the clutch.

[0033] Exemplarily, in this embodiment, the transmission device adopts a wet dual-clutch transmission, and the wet dual-clutch transmission generally includes a shift fork, two sets of gears, one input shaft, two output shafts, two clutches, two solenoid valves and A hydraulic pump, in which two sets of gears are respectively arranged on one output shaft, for example, one output shaft is equipped with 1st gear, 3rd gear...

Embodiment 2

[0070] This embodiment proposes a driving force recovery control device, the control device is configured in the transmission control unit, the control device includes a driving force recovery module, and the driving force recovery module is used for:

[0071] When the driving condition is switched from the stop coasting mode to the driving mode, determine the target gear position of the transmission, the target engine speed and the clutch speed; control the engine speed to increase to the target speed, and control the shift fork connection of the transmission when the engine starts to increase the speed into the target gear, wherein the target gear matches the clutch speed.

[0072] Optionally, when the transmission control unit controls the shift fork of the transmission to enter the target gear:

[0073] The driving force recovery module is used to control the oil filling of the clutch so that the oil pressure in the clutch is at a set target oil pressure, wherein the targe...

Embodiment 3

[0079] refer to figure 2 , this embodiment proposes a 48V drive system, including an engine control unit 100 and a transmission control unit 200 .

[0080] The engine control unit 100 is connected to the engine 300 , the transmission control unit 200 is connected to the wet dual-clutch transmission 400 , and the engine control unit 100 is communicatively connected to the transmission control unit 200 through the CAN bus.

[0081] In this embodiment, the transmission control unit 200 is used to implement the driving force recovery control method described in the first embodiment, and the beneficial effect is the same as that described in the first embodiment.

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Abstract

The invention discloses a driving force recovery control method, device and 48V driving system. When the driving condition is switched from the stop coasting mode to the driving mode, the control method includes: determining the target gear position of the transmission, the target engine speed and the clutch speed; controlling the engine speed to increase to the target speed, and controlling the transmission when the engine starts to increase the speed The shift fork of the key engages the target gear, wherein the target gear matches the clutch speed. The control method proposed by the present invention first selects the target gear in the driving force recovery stage, and directly connects the shift fork that is empty during the stop coasting stage to the target gear, so as to avoid the up-shift and downshift operations during the driving force recovery process, which can Reduced time to switch from stop coast mode to drive mode.

Description

technical field [0001] Embodiments of the present invention relate to automobile driving control technology, in particular to a driving force recovery control method, device and 48V driving system. Background technique [0002] A car with a 48V electrical system has a stop coasting mode. In this mode, the car engine stops and the transmission chain between the engine and the clutch is disconnected. When the driver depresses the accelerator pedal again, the vehicle needs to return to the normal driving mode. [0003] In the prior art, when it is necessary to switch from the stop coasting mode to the normal driving mode, in order to meet the driving needs of the driver, downshift control is usually required during the stop coasting process. In addition, the clutch controller also needs to provide The friction coupling elements in the transmission supply oil pressure so that the drive system can respond to the driver's acceleration request in time. The control method in the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W30/18B60W10/02B60W10/06B60W10/11
CPCB60W30/18072B60W10/02B60W10/06B60W10/11B60W2710/021B60W2710/027B60W2710/0644B60W2710/0666B60W2710/1005Y02T10/60
Inventor 王歆誉曹龙朱桂庆张荣辉李长洲
Owner CHINA FIRST AUTOMOBILE
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