求翻译：进气门提前开启的目的，是为了保证进气行程开始时气门已开大，新鲜气体能顺利地充入气缸。当活塞到达下止点时，气缸内的压力仍低于大气压力，在压缩行程开始阶段，活塞上移速度较慢的情况下，仍可以利用气流惯性和压力差继续进气，因此进气门晚关一点是有利于充气的。是什么意思？

The purpose of the intake valve opens earlier, is to ensure that the beginning of the intake stroke of the valve has opened a large, smooth filling of fresh air into the cylinder. When the piston reaches bottom dead point, the cylinder pressure is still lower than the atmospheric pressure, at the be

Tire valve opening to advance the purposes, in order to ensure that air valve has opened big trip at the beginning, fresh gas can be successfully filled with cylinders. When the piston reaches the point ended, when the pressure within cylinder is still lower than atmospheric pressure in a compressed

The air intake valve opens ahead of time the goal, is in order to guarantee the intake stroke starts the climate gate to open in a big way, the virgin gas physical ability sufficiently enters the air cylinder smoothly.When the piston arrives the bottom dead center, in the air cylinder pressure still

Purpose of the intake valve opens in advance, is to ensure that the inlet stroke valve has been opened at the start, smooth fresh gas filled cylinders. When when the piston reaches bottom dead center, in-cylinder pressure below atmospheric pressure, in the compression stroke at the start, the piston

The purpose of the intake valve opens earlier, is to ensure that