Technician A says that a diesel engine uses the heat of compression to ignite the diesel fuel. Technician B
Says that direct injection (DI) uses a pre-combustion chamber. Who is right?

Question

Quizplus · Accepted Answer

Technician A is correct because diesel engines indeed use the heat generated from compressing air in the cylinder to ignite the diesel fuel. Technician B is incorrect because direct injection (DI) systems inject fuel directly into the combustion chamber, not a pre-combustion chamber, which is a characteristic of older diesel engine designs or indirect injection systems.

Technician a Says That a Diesel Engine Uses the Heat