Technician A says that injection lag takes place when the time between the actual beginning of injection (BOI) lags behind the time when fuel pressurization takes place. Technician B says that injection lag is caused by poor quality fuel with a low cetane number (CN). Who is correct?

Question

Quizplus · Accepted Answer

Injection lag is the time between the start of injection and the time when the fuel pressure reaches its maximum value. This is caused by the time it takes for the fuel to travel from the injector to the combustion chamber. Poor quality fuel with a low cetane number (CN) can also contribute to injection lag, as it takes longer for the fuel to ignite.

Technician a Says That Injection Lag Takes Place When the Time