To keep the engine temperature in balance, a cooling system is necessary.

为保持发动机温度平衡，就必须有冷却系统。

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If you're breaking your engine in on the street or racetrack, the high speed incoming air will keep the engine temperature in the normal range.

如果你在马路或赛道上磨合你的发动机，高速进风可以使发动机温度保持在正常范围。

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This system can complete the engine rotational speed and torque high accuracy control and the test, also engine temperature, pressure, oil consumption parameters survey.

本系统能够完成发动机的转速、转矩的高精度控制与测试，以及发动机温度、压力、油耗等指标参数的测量。

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One is exhaust gas recirculation, which pumps cooled exhaust back into the engine air intake, lowering the combustion temperature and reducing NOx formation.

FORBES: Clearing the Air

The EPA engineers came up with a formula that automakers around the world have long been groping for--an engine that explodes fuel at such a relatively low temperature (below 2, 000 degrees Fahrenheit) that almost no noxious nitrogen oxides are produced.

FORBES: EPA, Inc.

The board also confirmed the right engine experienced a surge during a flight on January 13, and subsequent repairs included the replacement of a temperature probe.

CNN: Investigators find feather, other evidence on downed plane