丰田RAV4发动机气门杆弯曲分析  

作　　者：王志欣 张博乾 刘聪娜 张沙沙 

机构地区：[1]河北科技学院,保定071000

出　　处：《内燃机与配件》2020年第21期139-140,共2页Internal Combustion Engine & Parts

摘　　要：由于没有正常进行汽车维护作业,一辆行驶总里程为38万公里、发动机的排量为2.4L的丰田RAV4汽车,检修发现发动机缸体内积碳严重,机油油道严重堵塞,导致正时链条的张紧器不能正常起作用。链条过松引起发动机配气机构工作失效,导致各气缸进气门、排气门杆被活塞顶弯曲,发动机不能正常工作而熄火,直接经济损失达2万元人民币。Due to the lack of normal vehicle maintenance work,a Toyota RAV4 vehicle,with a total mileage of 380,000 kilometers and an engine displacement of 2.4L,has serious carbon deposition in the engine cylinder block and serious blockage of the oil duct,which led to the failure of the timing chain tensioner.The engine valve mechanism fails to work caused by the loosened timing chain.As a result,the intake and exhaust valve rods of each cylinder are bent by the piston crown.The engine can not work and stops.The direct economic loss is up to 20,000 yuan.

关 键 词：发动机 维护 张紧器 机油压力 正时链条 气门杆 弯曲 

分 类 号：S232.8[农业科学—农业机械化工程]