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What does MPI mean on a car?

1 Answers

Gertrude

07/24/25 6:47am

MPI on a car refers to the Multi-Point Injection system, also known as multi-point electronic fuel injection, sequential fuel injection, or individual fuel injection. In contrast to single-point injection, the multi-point injection system is equipped with one injector at the intake port of each cylinder. Controlled by the electronic control unit, it performs separate or grouped injection for each cylinder. Gasoline is directly injected in front of the intake of each cylinder and then mixes with air to form a combustible mixture before entering the cylinder. The characteristics of the multi-point injection system include: 1. Avoiding uneven air distribution and power loss caused by overlapping intake in adjacent cylinders; 2. Precise control over fuel injection quantity and timing based on the engine's timing. The forms of multi-point fuel injection include: simultaneous injection, grouped injection, and sequential injection.

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