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common rail direct injection (CDI)
A fuel-injection system that uses a single "rail" (fuel line) that maintains constant fuel pressure regardless of injection sequence (also called common rail injection). The engine's electronic timing regulates fuel-injection timing and quantity according to data from sensors on the camshafts and crankshafts so that compression and injection occur independently. Fuel is injected only as needed, which reduces fuel consumption and emissions.
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- Part of Speech: noun
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- Industry/Domain: Automotive
- Category: Vehicle equipment
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