Carrier later switched from piston power to the centrifugal chiller, which allowed much larger Spaces to be cooled.

Carrier后来把活塞动力改为离心式制冷机，可以冷却更大空间。

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The crankshaft, regarded as the "backbone" of the engine, serves to change the reciprocating motion of the piston into rotary motion and handles the entire power output.

曲轴，也叫做发动机的“脊柱”，其作用是将活塞的上下往复运动转换成为旋转运动，并且控制着整个的功率输出。

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The complete cycle of an engine requires four piston strokes: intake, compression power, and exhaust.

发动机完整的循环要求有活塞的四个冲程：进气、压缩、做功、排气。

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Incoming cooler ambient air from the other end of the piston causes the helium to contract and move the piston to generate AC power.

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Conventional four-stroke engines produce power by moving a piston up and down using rapid explosions of fuel and air in a cylindrical chamber.

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Instead of sparking the ignition when the piston is close to top dead center (when the air is compressed), that spark occurs as the piston is pulling away, when the air pressure is at its most turbulent, creating much faster ignition and more power.

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