Hybrid electric vehicle and constant speed cruise control method and control system

Abstract

The invention relates to a hybrid electric vehicle, a constant speed cruise control method and a constant speed cruise control system. The constant speed cruise control method includes the steps of detecting slope information at a set distance in front, detecting corresponding slope length information when the detected slope information is greater than or equal to a set first slope threshold, detecting the SOC (state of charge) of a power battery when the detected slope length information is less than or equal to a set slope length threshold, calculating the amount of power increase due to increased ramp resistance according to gradient, vehicle weight and cruising speed when the SOC of the power battery is greater than or equal to a set first SOC threshold, outputting the amount of the power increase through a motor, calculating the torque value that the motor needs to output based on motor speed, sending a signal to the motor through a controller, and controlling the output torque value of the motor in an electric state to balance and realize unchanged vehicle speed due to the increase of ramp resistance power. With vehicle information combined with road condition information, the constant speed cruise control method has the advantage of enabling the control reliability of constant speed cruise to be high.

Description

technical field [0001] The invention relates to a hybrid electric vehicle, a constant-speed cruise control method and a control system, and belongs to the technical field of the constant-speed cruise control of the hybrid electric vehicle. Background technique [0002] The constant speed cruise control system is generally used to control the constant speed of the car. Once the car is set to cruise, the fuel supply of the engine is controlled by the vehicle ECU, and the ECU continuously adjusts the fuel supply according to the road conditions and the driving resistance of the car. , so that the car always keeps running at the set speed without manipulating the accelerator, which reduces the driver's fatigue and reduces unnecessary speed changes. [0003] At present, the constant-speed cruise control of highway passenger cars has been equipped as standard, such as the patent document with the announcement number CN 105346390A and the name "A Constant-speed Cruise System and Co...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a hybrid electric vehicle constant speed cruise control method to solve the problem that the existing hybrid electric vehicle constant speed cruise control method does not consider the road conditions and cause the problem of low control reliability

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