What Causes Idle Vibration in Yuchai Engines?

[VonSawyer]

Idle vibration in Yuchai engines is caused by unstable oil pressure or aging engine components. The function of car idling: Idling is an operational state of a vehicle where the engine runs in neutral gear. The rotational speed of the engine during idling is referred to as the idle speed. The idle speed can be adjusted by modifying the throttle opening size. Essentially, idling means the engine is "producing power without doing work." When the engine is running and the accelerator pedal is fully released, the engine enters the idle state. Causes of unstable idling: Direct causes include contamination, wear, or improper installation of mechanical parts, leading to variations in individual cylinder power output. This results in an imbalance of power among cylinders, causing unstable engine idling. Indirect causes involve abnormalities in the engine's electronic control system, which lead to poor combustion of the air-fuel mixture, making it difficult to balance the power output of each cylinder and resulting in unstable engine idling.