Adaptive cruise acceleration method, adaptive cruise acceleration device and adaptive cruise acceleration system

A technology of adaptive cruising and vehicle speed, applied in the field of adaptive cruising, can solve problems such as longitudinal acceleration changes, large fluctuations, frequent fluctuations in demand torque, etc., achieve the goal of smooth changes in longitudinal acceleration, improve ride comfort, and increase service life Effect

Active Publication Date: 2016-03-02
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the research, the inventor found that in the above-mentioned technology, due to frequent and large fluctuations in demand torque, frequent and large fluctuations in the virtual throttle opening are caused, making the occupants extremely uncomfortable, and when the virtual throttle opening changes sharply, there will be As a result of frequent shifts in the transmission, the longitudinal acceleration of the vehicle will change drastically, thus affecting the service life of the engine and transmission

Method used

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  • Adaptive cruise acceleration method, adaptive cruise acceleration device and adaptive cruise acceleration system
  • Adaptive cruise acceleration method, adaptive cruise acceleration device and adaptive cruise acceleration system
  • Adaptive cruise acceleration method, adaptive cruise acceleration device and adaptive cruise acceleration system

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Embodiment Construction

[0037] figure 1 is a schematic flow chart of an adaptive cruise acceleration method according to an embodiment of the present invention, such as figure 1 As shown, the adaptive cruise acceleration method includes the following steps:

[0038] S101: Calculating the required torque according to the desired vehicle speed;

[0039] S102: Filter the above demand torque according to the filter coefficient;

[0040] In the embodiment of the present invention, the filter coefficient can be determined according to the delay time of the engine responding to the torque request. In practical applications, the filter coefficient cannot be too small, otherwise it will cause serious overshoot of the engine response torque, and the too small filter coefficient will make the slope of the transformed virtual throttle opening curve too large, and the slope of the virtual throttle opening curve will be too large. Frequent up-and-down shifts will affect the comfort of the passengers in the car;...

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Abstract

The invention provides an adaptive cruise acceleration method, an adaptive cruise acceleration device and an adaptive cruise acceleration system. The method comprises the following steps: the required torque is calculated according to the expected speed; the required torque is filtered according to the filter coefficient, and the required torque after filtering is sent to an engine management system; and the engine management system converts the required torque after filtering into virtual throttle opening degree to realize adaptive cruise acceleration. According to the embodiment of the invention, the frequency of transmission upshift and downshift is reduced, the longitudinal acceleration of vehicles is enabled to change smoothly, passengers in vehicles feel more comfortable, and the service life of the engine and the transmission is improved.

Description

technical field [0001] The invention relates to the field of adaptive cruising, in particular to an adaptive cruising acceleration method, device and system. Background technique [0002] The adaptive cruise control (Adaptive Cruise Control, hereinafter referred to as ACC) system is an intelligent control system that takes the driver's set vehicle speed as the control target. When the ACC system detects that there is a slower vehicle on the road ahead of the vehicle, the ACC system will Reduce the speed of the vehicle and control the gap or time gap with the vehicle in front. If the system detects that the vehicle in front is not on the road where the vehicle is driving, it will speed up the vehicle to return to the previously set speed. Because the ACC system can reduce driver fatigue intensity, increase vehicle safety, reduce environmental pollution and other advantages, it is more and more widely used and becomes one of the most popular driver assistance systems. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/14
CPCB60W30/143B60W2710/0605
Inventor 孙超秦喜乐
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD
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