1.配气机构的作用与分类配气机构的作用,是按照内燃机工作循环的要求,定时地开闭进、排气门,使新鲜空气或混合气适时吸入气缸,废气及时排出缸外,同时在压缩和作功行程中密闭气缸,保证内燃机正常工作。根据气门安放位置的不同,配气机构可分为侧置式和顶置式两大类。 1. The role and classification of gas distribution agencies The role of gas distribution agencies, in accordance with the requirements of the internal combustion engine working cycle, regularly open into and exhaust valve so that fresh air or mixture of gas inhalation timely cylinder exhaust gas out of the cylinder at the same time In the compression and power stroke closed cylinder, to ensure the normal operation of the internal combustion engine. According to the different valve mounting position, the gas distribution mechanism can be divided into two types of side and top-mounted.