Stationary slope control method and system for fuel cell vehicles

Abstract

The invention discloses a method for controlling a standing slope of a fuel cell vehicle, which includes the following steps: step 100: judging whether the vehicle enters the standing slope control function based on the vehicle state and the slope calculated in real time; step 200: under the standing slope control function , obtain the pre-control torque based on the slope calculated in real time and the vehicle speed obtained in real time; obtain the P feedback control torque and I feedback control torque based on the vehicle speed difference calculated in real time; step 300: based on the pre-control torque, P feedback control torque and I feedback control torque Output the first parking torque until the vehicle speed reaches the target control speed 0km / h; step 400: once the vehicle speed reaches the target control speed 0km / h, then output the second parking torque based on the pre-control torque and I feedback control torque until the vehicle speed occurs. Slope control function exit condition. In addition, the present invention also discloses a parking slope control system for a fuel cell vehicle, which implements the above parking slope control method.

Description

technical field [0001] The present invention relates to a control method and system, in particular to a standing slope control method and system. Background technique [0002] When the vehicle is driving on the road, it often encounters the working condition of driving on a slope. When the vehicle is parked on a slope, on the one hand, it is necessary to ensure that the vehicle is stable on the slope to reduce the driver's driving burden and avoid the occurrence of the vehicle sliding down the slope; Impact and rollback, because once rollback occurs, the vehicle will have major safety hazards, endangering the lives and property of itself and other drivers. [0003] In the current prior art, the following three methods are generally adopted for vehicle parking on a slope: electronic parking on a slope, automatic parking on a slope, and motor stalling on a slope. [0004] Among them, the electronic parking brake system and the automatic parking system are relatively expensiv...

AI Technical Summary

Problems solved by technology

However, it should be pointed out that this technical solution only uses feedforward control and does not use feedback control, so it is impossible to achieve precise torque control

At the same time, because there is no device such as a slope angle position sensor in this technical solution, the real-time slope calculation itself is not very accurate, which makes it difficult to calculate the driving resistance torque accurately, and eventually easily leads to too large or too small torque. That is to say, without dynamic adjustment, it is difficult to eliminate the slope from the source

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