基于动量守恒的发动机制动道路测试方法及应用研究  

Research on Engine Braking Road Test Methodology and Application Based on Constant Momentum

作　　者：朱江苏 史祥东 李静静 王长通 孙晶晶 Zhu Jiangsu;Shi Xiangdong;Li Jingjing;Wang Changtong;Sun Jingjing(State Key Laboratory of Engine and Powertrain System,Weifang 261061;Weichai Power Co.,Ltd.,Weifang 261061)

机构地区：[1]内燃机与动力系统全国重点实验室,潍坊261061 [2]潍柴动力股份有限公司发动机研究院,潍坊261061

出　　处：《汽车工程师》2023年第11期38-41,共4页Automotive Engineer

基　　金：国家重点研发计划项目(2022YFE0100100)。

摘　　要：为准确获得发动机制动功率,基于动量守恒定律提出了一种发动机制动道路测试方法。构建了基于车速和挡位的整车制动功率方程,可实现下坡工况手动挡变速器换挡提醒和自动变速器挡位选择,将所提出的测试方法制动功率测试结果与转鼓测试结果进行对比,结果表面,二者差值范围为-2.7%~3.4%,体现了该方法的准确性及有效性。To obtain engine braking power accurately,this paper proposed a method of engine braking road test based on the momentum conservation law.A vehicle braking power equation based on speed and gear was built to provide a warning of downhill shifts and AT gear selection.Braking power test result obtained with the proposed test method was compared with dynamometer test result,with a difference range of-2.7%~3.4%,demonstrating accuracy and effectiveness of this method.

关 键 词：动量守恒 制动功率 发动机制动 道路测试 换挡提醒 

分 类 号：U464.1[机械工程—车辆工程]