基于发动机四参数的轮式越野车换挡加速时间计算  

Calculating for gear-shift accelerating time of off-road vehicle based on four parameters of engine

作　　者：商高高[1] 周燕[1] 童成前[1] 何建清 

机构地区：[1]江苏大学汽车与交通工程学院,镇江212013 [2]总装备部汽车试验场,南京210028

出　　处：《机械设计与制造》2011年第11期31-33,共3页Machinery Design & Manufacture

基　　金：总装备部科研计划项目(ZLA0703)

摘　　要：在只有发动机最大功率、最大扭矩及其对应转速等四大参数的情况下,引入限定车速系数,以"可能的最短总加速时间"为原则确定换挡车速点;以基于发动机四参数的外特性模型为基础建立轮式越野车加速度模型,进而确定等加速度车速;由加速度模型建立不含积分运算的各档加速时间计算公式;考虑每次换挡所耗时间,推导换挡加速时间计算模型。利用Matlab对某轮式越野车等加速度车速、换挡车速、加速度和换挡加速时间进行设计计算,实例结果表明,该方法易于在Matlab中用程序实现,计算精度也有所提高。The gear-shift speed was confirmed with the principle of ＂the shortest possible total accelerating time＂by introducing coefficient of limit speed in the condition of knowing only four parameters of the engine,such as max.power,max.torque and relative rotating speed;And then off-road vehicle acceleration model was built based on dynamic characteristics model of four parameters of engine,thus equal accelerated speed was ascertained;Meanwhile computational formula for accelerating time of each gear was established without integral operation based on acceleration model;In consideration of time-consuming of each gear-shifting a computation model for gear-shift accelerating time was deduced.Afterwards design and computation for equal accelerated speed,gear-shifting speed,acceleration and accelerating time for gear-shifting of one wheel type SUV was done by applying Matlab,which result indicates that the method is easy to achieve with program in Matlab and the computation accuracy is improved.

关 键 词：加速度模型 换挡车速 换挡加速时间 程序设计 

分 类 号：TH16[机械工程—机械制造及自动化] U462.31[机械工程—车辆工程]