Anti-slope-sliding function control method and system for electric vehicle

Abstract

The invention discloses an anti-slope-sliding function control method for an electric vehicle. The anti-slope-sliding function control method comprises the following steps that S1, when it is judged that the vehicle is on a slope and the current vehicle is static on the slope, an anti-slope-sliding function is entered to execute the next step; S2, when it is judged that the vehicle is currently inthe slope sliding state, the next step is executed; S3, the VCU sends an anti-slope-sliding signal to the MCU, and the VCU requests the motor torque to be reset; and S4, the MCU calculates PI parameters needing to be executed currently, and the output torque of the motor is adjusted according to the PI parameters. The anti-slope-sliding function control method and system are compatible with the electric vehicle with the HHC, the electric vehicle is further protected after the HHC exits, slope sliding is prevented, and the problem of slope sliding during slope starting of the electric vehiclewithout the HHC can also be solved.

Description

technical field [0001] The invention relates to a complete vehicle controller of an electric vehicle, in particular to a technology for preventing the vehicle from rolling when the vehicle starts on a slope. Background technique [0002] Along with social development, people's living standard improves, and there are more and more vehicles on the road, which brings inconvenience to vehicles. It is more common for vehicles to slip on slopes. At present, some electric vehicles will be equipped with HHC to start on the slope. [0003] Existing HHC functions are based on the slope sensor and electronic brake system. Specifically, when the slope sensor judges that the slope is uphill and the gear position is in the D gear (forward gear), or the sensor judges that it is downhill and the transmission is in the R gear (reverse gear), When the brake pedal is released, the brake pressure is maintained for 1 to 2 seconds for a brake delay, and the brake pressure is released when the ac...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to realize a solution to the electric vehicle equipped with HHC, the accelerator pedal is not stepped on after 1 to 2 seconds after the brake pedal is released, the problem of vehicle slipping and the electric vehicle not equipped with HHC, driving In order to solve the problem of people starting and sliding on a slope, a control method and system for stably parking and starting an electric vehicle on a slope are provided.

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