Vehicle constant speed cruise control method

Abstract

The invention provides a vehicle constant speed cruise control method. The method comprises the following steps of: transmitting a constant speed cruise request to VCU by a driver by virtue of a button when a vehicle needs to perform constant speed cruise while driving, acquiring the current accelerator pedal position information, brake pedal position information, information whether complete vehicle is in an operating state or not and gear switch position information by VCU, and judging whether the constant speed cruise request transmitted to the VCU by the driver is valid, wherein the constant speed cruise is not performed if the current vehicle state does not meet the set conditions of the constant speed cruise; recording the current vehicle information as a target speed and a target rotating speed of the constant speed cruise by the VCU if the current vehicle state meets the set conditions of the constant speed cruise; and starting the constant speed cruise according to the acquired target speed by the VCU after the driver transmits a command of starting the constant speed cruise to the VCU by the button. According to the vehicle constant speed cruise control method provided by the invention, the fuel injection amount does not need to be accurately controlled like the traditional fuel vehicle, and the torque and rotating speed output of the motor can be accurately controlled by a torque or rotating speed request of the complete controller.

Description

technical field [0001] The invention relates to a vehicle constant speed cruise control method. Background technique [0002] The cruise control of the vehicle is to set the current vehicle speed as the cruise speed through a series of buttons when the driver drives to a certain speed and activate the cruise control function. At this time, the accelerator pedal will be fixed at the accelerator pedal position corresponding to the vehicle speed when the cruise is set. The system fixes the speed of the vehicle near the speed value set by the driver by obtaining the position signal of the accelerator pedal; the driver can cancel the cruise control by stepping on the brake pedal, pressing the cruise control cancel button, or stepping on the accelerator pedal. [0003] The existing cruise control method has the following disadvantages. 1. The electronic accelerator pedal used in the traditional cruise control requires a position fixing device, which increases the cost of the vehic...

AI Technical Summary

Problems solved by technology

[0003] The existing cruise control method has the following disadvantages. 1. The electronic accelerator pedal used in the traditional cruise control requires a position fixing device, which increases the cost of the vehicle, and is prone to failures that cause rapid acceleration of the vehicle and affects safety; 2. Generally only Cruise control can only be activated at high speeds, and cruise control cannot be used for some vehicles that work at low speeds, such as sprinklers and sweepers; 3. The vehicle will save the cruise speed after stopping the cruise. When the cruise is triggered, it will cause rapid acceleration and affect the safety of the vehicle

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