What Are the Causes of Diesel Engine Idle Instability?

[McSarah]

It may be due to several situations such as significant cylinder leakage during idling, high energy loss within the cylinder, resulting in lower compression temperature and pressure, poor fuel atomization, and large combustion fluctuations. Below is an introduction to car idling: The function of car idling: Idling is a working condition of the car, referring to the engine running in neutral gear. The engine speed during idling is called the idle speed. The idle speed can be adjusted by modifying the throttle size, among other methods. Idling means the engine "exerts force without doing work." When the engine is running, if the accelerator pedal is completely released, the engine is in an idling state. Causes of idle instability: Direct causes refer to mechanical parts being dirty, worn, or improperly installed, leading to changes in cylinder power, resulting in an imbalance of power among cylinders and causing engine idle instability. Indirect causes refer to abnormalities in the engine's electronic control system, leading to poor combustion of the air-fuel mixture, making it difficult to balance the power among cylinders, and causing engine idle instability.