What does idle operation mean?

1 Answers
DiNevaeh
07/30/25 2:29am
Idle speed refers to the operation of the engine under no-load conditions, where it only needs to overcome the frictional resistance of its internal components without delivering power externally. The minimum rotational speed required to maintain stable engine operation is referred to as idle speed. Below is an introduction related to engine idle operation: 1. Explanation: When the engine is idling, the reading on the oil pressure gauge indicates the idle working pressure of the fuel supply system, which is generally 0.25MPa or complies with the technical specifications of the vehicle model. When checking the idle working pressure, the oil pressure should rise to 0.3MPa after removing the vacuum tube from the fuel pressure regulator; otherwise, the oil pressure regulator should be replaced. 2. Precautions: During engine operation, it is essential to frequently monitor the readings of the oil pressure gauge and coolant temperature gauge. If the oil pressure and coolant temperature values significantly deviate from the norm, the engine should be shut down immediately for inspection, or a car service station should be contacted.
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