On a 2-stroke engine, the upward stroke is the compression stroke.

在2冲程发动机，向上中风是压缩行程。

On a 2 - stroke engine, the upward stroke is the compression stroke.

在2冲程发动机, 向上中风是压缩行程.

A new ICE working cycle with a partial isothermal compression stroke is advanced.

本文提出了一种新的内燃机理想循环——具有部分等温压缩冲程的内燃机工作过程.

Then diesel fuel oil is injected or sprayed into the cylinder at the end of the compression stroke.

然后在压缩冲程即将结束时，柴油燃料被喷射或被喷雾进入气缸。

In this process fuel is injected once into the specially shaped piston recess just prior to the end of the compression stroke when the engine is being started.

在此过程中，发动机起动时，燃油会在压缩冲程即将结束之前一次性地喷射到特制形状的活塞凹槽中。

In a diesel engine, there is no spark plug. Instead, diesel fuel is injected into the cylinder, and the heat and pressure of the compression stroke cause the fuel to ignite.

柴油发动机内没有火花塞，取而代之的是将柴油喷入发动机气缸，然后压缩冲程在高温高压下引起燃料点火。

Intake-generated tumbling motion has been recently proposed to enhance the turbulence level during compression stroke to promote the combustion rate and reduce operation variations.

最近倡议利用滚转运动增强引擎中之紊流强度，以增进燃烧效率与降低运转变异性。