The first stoke being the intake stroke.

第一个程是进气程。

There's four stroke motors, four stroke piston engines being the most common.

有程电机，程活塞动机是最常见的。

So let's talk about the four strokes of the motor.

所以让们来谈谈程电机。

The intake stroke, piston goes down.

进气程活塞下降。

" I also understand that India has now banned the two-stroke gas engine."

“理解印度现在禁止二程燃气动机。”

An opposed-piston engine is a two-stroke engine with separate oil flow.

一台置活塞动机就是单独油流量的二程动机。

If you make the stroke of the crankshaft longer, you'll get more torque.

如果你延长曲轴的程，你会得到更多的扭矩。

Honda's fascination with mechanics led to an incredible redesign of the four-stroke engine.

本田机械的迷恋导致程动机进行了令人难以置信的重新设计。

Over time, the wing beat that helps them scramble becomes the power stroke that helps them fly.

随着时间的推移，帮助它们攀爬的翅膀拍打变成了帮助它们飞行的动力程。

There was the angry whine of the self-starter and then the little two-stroke engine caught and started hammering busily.

自启动器出愤怒的呜呜声， 然后小型二程动机被抓住并开始忙碌地敲打。

If you make the stroke of the crankshaft shorter, you're going to lose torque, but you'll be able to gain RPM.

如果你缩短曲轴的程，你就会失去扭矩，但你将能够获得RPM。

Most birds only generate lift on the downstroke of each flap, while using the upward recovery stroke to set up their next wing beat.

大多数鸟只在每个襟翼的下程中产生升力，同时使用向上恢复程来设置它们的下一个翅膀拍打。

The overall lighter architecture of gasoline engines, and the shorter bore-and-stroke combination, allow for greater power output and the capability to reach higher revolutions per minute (RPMs) .

汽油动机的整体结构更轻，内径和程组合更短，允许更大的功率输出和达到每分钟更高转数（RPM）的能力。

On the flip side, diesel engines are bulky, and typically consist of longer piston strokes, so they can't reach high RPMs without incurring a lot of mechanical strain.

另一方面，柴油动机体积庞大，通常由更长的活塞程组成，因此它们无法在不产生很大机械应变的情况下达到高转速。

So going back to the four strokes of the motor, the piston is forced down, as the piston is forced down, it's forced down on a crank shaft.

说回到程电机，活塞被向下推，当活塞被向下推时，它被压在曲轴上。

Diesel requires heat and pressure, same concept, same four strokes, but the piston comes up, it's compressing the diesel and the air, but much higher pressure than a gasoline motor.

柴油需要热量和压力，相同的概念，相同的程，但活塞上来，它会压缩柴油和空气，但压力比汽油动机高得多。