发动机制动与电涡流缓速器联合制动下长大下坡路段辅助减速车道位置设置研究  

Research on Position Setting of Auxiliary Deceleration Lane for Long Downhill Section Under Combined Brake of Engine Brake and Eddy Current Retarder

作　　者：曹鑫 余强[1] Cao Xin;Yu Qiang(School of Automobile,Chang'an University,Shaanxi Xi'an 710064;Road Transportation Career Development Center of Shaanxi Province,Shaanxi Xi'an 710003)

机构地区：[1]长安大学汽车学院,陕西西安710064 [2]陕西省道路运输事业发展中心,陕西西安710003

出　　处：《汽车实用技术》2020年第10期192-195,共4页Automobile Applied Technology

基　　金：榆林市科技计划项目(2018-2-26);陕西省重点研发计划(重点项目)(2018ZDXM-GY-082)。

摘　　要：目前重型货车在下长大坡路段持续制动极易引起行车安全问题,在长大下坡路段增设辅助减速车道,在一定程度上可缓解下坡安全问题。通过理论研究行车制动器自动过程中温度变化模型,以制动器热衰退临街温度为阈值确定下坡安全距离,以此分析确定辅助减速车道的位置设置合理区间。首先对发动机制动和电涡流缓速器联合作用下对重型汽车进行下坡能力分析,通过对行车制动器安全温度阈值内的汽车安全下坡距离的研究,确定不同坡度下车辆下坡行驶安全距离,得到下坡安全距离最长坡长为10km左右,基于此确定辅助减速车道的设定位置。At present, it causes driving safety problems easily for the heavy-duty truck because of the continuous braking on long downhill section, adding auxiliary deceleration lane can alleviate the downhill safety problems to a certain extent. By analyzing the temperature rise model of service brake and the temperature critical point of brake thermal recession, the safe distance of downhill is ascertained, so as to set the location of auxiliary deceleration lane. Firstly, analyze the downhill ability of heavy vehicles under the combined action of engine braking and eddy current retarder, then, study the safe downhill distance of vehicles within the safe temperature threshold of service brake and ascertain the safe downhill distance varying with different slopes. As consequences show, the maximum safe downhill distance is about 10 km, the auxiliary deceleration lane can be set according to distance.

关 键 词：发动机制动 电涡流缓速器制动 下坡安全距离 辅助减速车道 

分 类 号：U467[机械工程—车辆工程]