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A control method for starting at a high gear and maintaining a parking gear in a manual mode

A manual mode and control method technology, applied in the direction of transmission control, toothed components, belts/chains/gears, etc., can solve the problems of reducing the success rate of escape, so as to improve the success rate of escape and reduce the number of shift operations , the effect of increasing controllability

Active Publication Date: 2020-05-22
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a vehicle without a high starting gear holding function, it will automatically shift to 1st gear when parking after failing to get out of trouble. During the process of getting out of trouble, the driver needs to perform frequent gear shifting operations, which reduces the success rate of getting out of trouble

Method used

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  • A control method for starting at a high gear and maintaining a parking gear in a manual mode
  • A control method for starting at a high gear and maintaining a parking gear in a manual mode
  • A control method for starting at a high gear and maintaining a parking gear in a manual mode

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Embodiment Construction

[0034] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0035] figure 1 It is a schematic flowchart of a control method for starting in a high gear and maintaining a parking gear in manual mode provided by an embodiment of the present invention; figure 2 Shown is a schematic diagram of the working condition of starting at M2 gear and stopping at M2 gear; image 3 Shown is a schematic diagram of the working condition of M2 gear start, when the lowest gear that has ever appeared is M1 gear, and the parking remains in M1 gear; Figure 4 The diagram shows the working condition of M2 gear start, when there is a manual / automatic mode switching operation, the parking remains in M1 gear; Figure 5 Shown is the schematic diagram of the working condition of M2 gear start, when the vehicle speed > V2, stop and keep i...

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Abstract

The invention provides a manual mode high-gear starting and stopping gear keeping control method which includes the steps: setting speed values of an M2 gear shifted from an M1 gear and an M3 gear shifted from an M2 gear allowed by a manual mode into 0km / h to reach in-situ starting of the M2 gear and the M3 gear of the manual mode; keeping the M1 gear in stopping under driving of any working condition after starting is implemented by the M1 gear in the manual mode when the speed is lower than a first speed threshold value; keeping the gear not higher than the M2 gear or M3 gear in stopping after starting is implemented by the M2 gear or M3 gear of the manual mode when the speed is smaller than the first speed threshold value, and automatically judging a suitable stopping gear according tothe working condition. According to the method, a manual mode high-gear in-situ starting function can be achieved, the starting performance and the breakout capability of pavements with low adhesion coefficients are improved, stopping gear keeping of the starting gears is automatically controlled, and the manual gear shifting frequency of a driver is reduced in breakout.

Description

technical field [0001] The invention relates to a control method for starting at a high gear and maintaining a parking gear in a manual mode, in particular to a control method for starting at a high gear and maintaining a parking gear in a manual mode of an automatic transmission. Background technique [0002] Necessity of high-gear starting in manual mode: At present, most models have high-gear starting in manual mode, especially the 3rd gear starting function is rare. In order to improve the starting performance of the vehicle, especially for models that emphasize off-road performance, it is necessary to consider a variety of non-paved road conditions, including low-attached ice and snow roads, muddy ruts, sandy silt, grass, rocks, etc. On non-deformable roads with low coefficient of adhesion (such as compacted snow, ice, and clay roads), and roads with low coefficient of adhesion and high rolling resistance (such as soft sand and snow-covered roads), it is desirable for t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/02F16H59/44
CPCF16H59/44F16H61/0204
Inventor 程健曲白雪许俊张宇赵永强王小峰赵弘志王昊
Owner CHINA FIRST AUTOMOBILE
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