What is a typical idle injection quantity in a diesel engine?

In diesel engines, the typical idle injection quantity is generally around 2 - 10 cubic millimeters (mm³). This quantity refers to the amount of fuel injected into the combustion chamber during the idle phase of the engine operation. At idle, the engine requires a relatively small amount of fuel to maintain operation, as the engine is running at a lower RPM and producing less power compared to higher load conditions.

The quantity of injection at idle is finely controlled to ensure that the engine runs smoothly without knocking, starts reliably, and minimizes emissions. Having an idle injection quantity that is too low may cause the engine to stall or run rough, while too much fuel can lead to excessive smoke and other combustion issues.

Correctly recognizing the typical range of idle injection quantity is crucial for diagnostics and adjustments in fuel injection systems, especially when addressing performance issues in heavy-duty diesel engines.