What does MPI mean?
2 Answers
In automobiles, MPI refers to Multi-Point Injection system, also known as Multi-Point Fuel Injection or Sequential Fuel Injection or Individual Fuel Injection, as opposed to Single-Point Injection. Principle of Multi-Point Injection system: The Multi-Point Injection system is equipped with an injector at the intake port of each cylinder, controlled by an electronic control unit for individual cylinder injection or group injection. Gasoline is directly injected into the intake front of each cylinder and then enters the cylinder with air to form a mixture. Function of Multi-Point Injection system: It avoids uneven air distribution and power loss caused by overlapping intake of adjacent cylinders; it precisely controls the fuel injection quantity and timing according to the timing. The forms of Multi-Point Fuel Injection include simultaneous injection, group injection, and sequential injection.
MPI, which stands for Multi-Point Injection in automotive fuel systems, simply means injecting fuel individually in front of each engine cylinder rather than at a single centralized point. I've seen plenty of these in my repair work—it's way more reliable than old carburetors, reduces fuel consumption, and delivers stable power. Especially in economy cars like the Toyota Corolla, MPI is commonly used because it's easier to maintain; just regular cleaning of the fuel injectors is needed, unlike the more finicky direct injection systems. But don’t think it’s flawless—fuel consumption might still be slightly higher in city traffic jams. Overall, though, it’s dependable and great for daily commuting. If you notice unstable idling or increased fuel consumption, chances are the fuel injectors are clogged.
