What is MPI?

[DeCassandra]

MPI stands for Multi-Point Injection, also known as multi-point fuel injection. In this system, each cylinder is equipped with a fuel injector, enabling independent fuel supply to each cylinder and avoiding the drawbacks of single-point injection. The fuel injection volume for each cylinder in a multi-point injection system is controlled and adjusted by the computer, allowing for more precise fuel injection quantity and timing to each cylinder, thereby improving the engine's combustion efficiency. The injectors in a multi-point injection system are connected in parallel, and the ECU sends the same signal to all injectors in the same group. The injectors open and close at the same time, simplifying the programming and electronic circuitry. However, this system lacks the ability to adapt to varying engine conditions, which can lead to the phenomenon of fuel-air mixture lingering in the intake manifold.