Heavy Duty Equipment Technician Red Seal Exam Prep · Question
What is the primary function of a Common Rail Direct Injection (CRDI) system in a diesel engine?
CRDI systems use a common rail to supply high-pressure fuel to electronically controlled injectors. This allows for precise control over injection timing, press
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Question: What is the primary function of a Common Rail Direct Injection (CRDI) system in a diesel engine?
Answer options: ✅ To electronically control and precisely time fuel injection
- To mix fuel and air before entering the combustion chamber
- To provide a constant supply of oil to the engine
- To cool the exhaust gases before they exit the vehicle
Correct answer: To electronically control and precisely time fuel injection
Explanation: CRDI systems use a common rail to supply high-pressure fuel to electronically controlled injectors. This allows for precise control over injection timing, pressure, and duration, optimizing combustion and reducing emissions.
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