Which is More Fuel-Efficient: Multi-Point Fuel Injection or Direct Injection?

[SanAdalynn]

Here is a related introduction to which is more fuel-efficient between multi-point fuel injection and direct injection: 1. Multi-point fuel injection: Multi-point injection engines can adopt sequential injection, allowing for more precise air-fuel ratio control compared to single-point injection. It enables precise control over fuel injection quantity and timing, resulting in better emissions and greater fuel economy for multi-point injection engines. However, the structure is more complex than single-point injection, leading to higher costs. 2. Direct injection: The air-fuel mixture in direct injection engines is leaner than that in conventional fuel injection engines. A leaner mixture improves fuel economy, meaning a direct injection engine consumes less fuel for the same amount of work. However, the technical requirements are higher, with the main challenge being the implementation of "stratified combustion." The core of this technology lies in the design of the combustion chamber's internal shape.