Automotive Servicing NC I Practice Questions - TESDA Automotive Servicing NC I Competency Assessment Exam

In DI engines, fuel is injected directly into a combustion chamber formed in the piston crown, whereas IDI engines inject fuel into a small pre-chamber. DI engines use spark plugs for combustion, whereas IDI engines rely purely on heat of compression. DI engines inject fuel into the intake manifold, whereas IDI engines inject fuel directly into the cylinder. DI engines have the fuel injectors mounted in the crankcase, whereas IDI engines mount them in the cylinder head.