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Shift control method of automobile transmission

A technology of automobile gearbox and control method, which is applied in the direction of transmission control, components with teeth, belt/chain/gear, etc., and can solve the problem that the automobile gearbox cannot select the shift point, etc.

Active Publication Date: 2011-12-28
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly solves the technical problem that the automobile gearbox in the prior art cannot properly and simply select the shift point according to the current driving conditions, and provides an automobile transmission that can consider various driving conditions and select an appropriate shift point. box shift control method

Method used

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  • Shift control method of automobile transmission
  • Shift control method of automobile transmission
  • Shift control method of automobile transmission

Examples

Experimental program
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Embodiment

[0076] Example: The vehicle is in a high gear state and is driving on a steep, inclined uphill road (the vehicle load is greater than the activation load limit of the uphill shift offset value, and the vehicle load is 0.9ms -2 ), the altitude here (the measured air pressure is lower than the activated air pressure of the altitude offset value, and the calculated air density is 0.75 bar) and the pedal position is at 71%, the mode position switch is switched to normal, and the hydraulic variable The torque converter is operating normally, the engine brake shift curve is invalid, the transmission fluid temperature is at operating temperature (higher than the activation temperature of the thermal engine shift curve, and lower than the activation temperature of the thermal shift bias curve), and the engine oil temperature is also at Operating temperature state (above cold engine shift curve activation temperature). according to figure 1 , the normal shift curve is selected as the ...

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Abstract

The invention discloses a shift control method of an automobile gearbox, and aims to provide a shift control method of an automobile gearbox capable of setting different shift points according to the current driving environment. The shift control method comprises the following steps: a, selecting a basic shift curve according to the transfer case state, the engine temperature and the transmission oil temperature; b, selecting an elevation offset value according to the air pressure, the transmission oil temperature and the basic shift curve; c, selecting an expanding offset value according to the car load and the transmission oil temperature; d, using the elevation offset value and the expanding offset value to revise the basic shift curve; and e, monitoring the pedal position when a vehicle runs, and determining the corresponding shift point according to the revised shift curve. An optimal shift table can be selected according to the transfer case state, the transmission temperature, the engine temperature, the air density and the car load, thereby providing the best driving state. The shift control method provided by the invention is suitable for all automobile automatic gearboxes.

Description

technical field [0001] The invention relates to a shift control method of an automobile gearbox, in particular to a selection of a shift point of a gearbox. Background technique [0002] In the automatic transmission of a car, the speed range is automatically shifted according to the change of the driving state to obtain the ideal driving state. The gear shift indication is formulated after comprehensive consideration of many road conditions, such as outdoor roads, expressways, rugged mountain roads, icy roads, surrounding air density, roads in extremely cold or hot weather, etc. Contents of the invention [0003] The present invention mainly solves the technical problem that the automobile gearbox in the prior art cannot properly and simply select the shift point according to the current driving conditions, and provides an automobile transmission that can consider various driving conditions and select an appropriate shift point. Box shift control method. [0004] The a...

Claims

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Application Information

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IPC IPC(8): F16H59/50F16H59/72F16H59/78F16H59/60
Inventor 艾伦・莫里斯陈勇赵福全
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD
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