汽车发动机三种重要技术多气门发动机多气门发动机是指每一个气缸的气门数目超过两个,有两进一排三气门式;四气门式和五气门式。目前轿车上多是四气门式的。例如日本凌志LS400型轿车的发动机就是8缸32个气门。增加了气门数目就要增加相应的配气机构装置,构造比较复杂,一般由两支顶置式凸轮轴来控制排列在气缸燃烧室中心线两侧的气门。气门布置在气缸燃烧室中心两侧倾斜的位置上,是为 Three key technologies of automotive engines Multi-valve engine Multi-valve engine is the number of valves for each cylinder more than two, there are two into a row of three-valve type; four-valve and five-valve. At present, the car is more than four-valve type. For example, the Japanese Lexus LS400 sedan engine is 8-cylinder 32 valves. Increasing the number of valves is necessary to increase the corresponding valve mechanism, the structure is more complex, usually by two overhead camshaft control arranged in the cylinder chamber on both sides of the centerline of the valve. Valve arrangement in the cylinder combustion chamber on both sides of the center of the tilt position, yes