Is Direct Injection Better or Multi-Point Injection Better?
1 Answers
Multi-point injection has obvious advantages over carburetor models, while direct injection is a new technology that outperforms electronic injection in all aspects except for higher production costs and more complex processes. Below is a detailed introduction to both: 1. Electronic Injection: The electronic injection system in car engines generally consists of three main components: the fuel injection circuit, sensor group, and electronic control unit. If the injector is installed in the original carburetor position, meaning there is only one fuel injection point for the entire engine, this is called single-point injection. If injectors are installed on the intake pipe of each cylinder, meaning fuel is injected into the cylinders from multiple locations (at least one injection point per cylinder), this is called multi-point injection. 2. Direct Injection: The injector is placed inside the cylinder, where fuel is atomized and sprayed into the cylinder under high pressure, mixing with air for ignition. This enables lean combustion within the cylinder, thereby improving engine efficiency. It also offers excellent fuel economy and lower exhaust emissions. Additionally, direct injection technology allows for higher compression ratios, significantly increasing power output in engines of the same displacement.
