Gear position control system of AMT vehicle and gear control method thereof

Abstract

The invention relates to a shift control system of AMT vehicle, and relative method, wherein it comprises a control unit, a shift convert unit, and an accelerator sensor used to sense road condition; the accelerator sensor transmits the sensed road condition signal to the control unit; control unit judges the single to recognize the road condition and control shift converter to switch shift based on relative road condition. The invention can improve the property of AMT vehicle and prolong the service life.

Description

【Technical field】 [0001] The invention relates to a vehicle equipped with an AMT (automatic mechanical transmission), in particular to a system and a method for the AMT vehicle to identify road conditions and perform gear position control. 【Background technique】 [0002] Vehicles equipped with AMT (Auto Tnated Mechanicar Transmission, that is, electronically controlled mechanical automatic transmission) replace the manual operation of clutch separation and engagement by adding a microcomputer device without changing the main structure of the original vehicle gearbox. And the gear selection and shifting action of the transmission to realize the automation of the whole process of shifting. The driver uses the gear shifting mechanism to issue an instruction for the car to start or shift gears, and the computer simulates the human brain to control the actuator to fully simulate the driver's gear shifting action. During the start and shift of the car, the accelerator compensatio...

AI Technical Summary

Problems solved by technology

However, when the vehicle suddenly accelerates and decelerates, or the vehicle is driving under complex road conditions such as slopes and curves, this shifting rule cannot correctly understand the driver's intention, resulting in frequent and unexpected shifting

Since this conversion gear does not shift gears according to road conditions, it has the following disadvantages: 1) the vehicle will frequently shift gears when going up, downhill or bumpy road conditions

And because the power transmission of AMT still relies on the mutual meshing of several sets of gears to achieve the change of speed ratio, just like the traditional manual transmission, so the frustration caused by the gear change still exists during driving, and this frustration has the same characteristics as The manual gearbox is different in that it automatically shifts gears when the vehicle speed reaches a certain value, so the generation of frustration has a certain degree of suddenness, which seriously affects the driving comfort and safety, and also reduces the reliability and life of AMT.

2) When the AMT vehicle is on an uphill road, if the vehicle speed does not change significantly, the gear will remain in the high gear, which makes the vehicle's climbing power insufficient, resulting in energy waste

3) When an AMT vehicle decelerates rapidly or on a downhill road, the vehicle speed is still relatively high, and the gear is still in the high-speed gear. It cannot autonomously use the drag effect of the engine in the low-speed gear to slow down the car quickly, thereby increasing the risk of driving

4) When the AMT vehicle is turning, if the speed does not drop to the downshift speed, the gear will still remain in the high gear, which will increase the risk of turning

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