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随着改革的不断深入和市场经济的迅猛发展,为满足交通运输事业和农业机械化生产作业的要求,汽车、拖拉机的数量日益剧增,驾驶员的队伍在不断扩大。为了使汽车、拖拉机在良好的技术状态下工作,驾驶员应注重对气门间隙的经常性检查。目前,汽车、拖拉机上使用的内燃机均属于汽油机和柴油机,它们广泛采用气门设置在气缸盖上的顶置式配气机构。顶置式配气机构气门间隙的概念是指气门在完全关闭状态时,摇臂端头与气门杆尾端之间的距离。由于进、排气门在工作时所受的温度不同,选用
With the deepening of reform and the rapid development of the market economy, the number of cars and tractors has been on the rise and the ranks of drivers have been constantly expanding in order to meet the requirements of transportation and agricultural mechanization. In order to make cars, tractors work in good technical condition, the driver should pay attention to the regular inspection of the valve clearance. At present, the internal combustion engines used in automobiles and tractors belong to gasoline engines and diesel engines. They widely use the overhead valve mechanism with valves arranged on the cylinder head. The concept of the top-mounted valve mechanism valve clearance refers to the distance between the end of the rocker arm and the tail end of the valve stem when the valve is fully closed. As the intake and exhaust valve at work suffered different temperatures, the selection