A constant speed cruise control system and a control method applied to a pure electric vehicle

Abstract

The invention discloses a constant speed cruise control system and a control method applied to a pure electric vehicle. The control system comprises an information acquisition processing module, a cruise state machine module and a cruise control module. The information acquisition processing module is responsible for identifying and processing cruise key signals and various signals. The cruise state machine module is responsible for taking the constant speed cruise key and some information of the vehicle as the signal input and outputting the vehicle demand signal through the transition condition and the limit condition of the state machine. The cruise control module is used for making the closed-loop control according to the constant speed cruise demand vehicle speed and the collected current vehicle speed, getting the acceleration or deceleration signal, and finally getting the constant speed cruise demand torque through conversion. The invention improves the controllability, the comfort and the safety of the vehicle. The invention can stably and effectively set cruise vehicle speed, and the response of the cruise vehicle speed is rapid. Smooth torque switching, stable speed; during cruising and decelerating, the energy can be recovered, the utilization rate of vehicle energy can be improved, and the driving range can be increased.

Description

technical field [0001] The invention belongs to the technical field of vehicle control of pure electric vehicles, and in particular relates to a constant speed cruise control system and control method applied to pure electric vehicles. Background technique [0002] In recent years, with the rapid development of the electric vehicle industry and the improvement of users' demand for electric vehicle functions, vehicle auxiliary driving systems have been increasingly applied to pure electric vehicles to reduce the driving intensity of drivers and improve Driving comfort, versatility and practicality. Among the vehicle assisted driving systems, the cruise control system is more representative. However, the control methods currently applied to electric vehicles are mostly transplanted to traditional vehicles, without considering the structural characteristics of electric vehicles, the impact of slope changes, and load changes on vehicles, resulting in slow response to vehicle sp...

AI Technical Summary

Problems solved by technology

However, the control methods currently applied to electric vehicles are mostly transplanted to traditional vehicles, without considering the structural characteristics of electric vehicles, the impact of slope changes, and load changes on vehicles, resulting in slow response to vehicle speed settings, poor followability, and reduced energy utilization. problems such as

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