What does multi-point fuel injection in an engine mean?
2 Answers
Multi-point fuel injection in an engine refers to: each cylinder being injected individually, meaning each fuel injector performs corresponding injections according to the working process of its own cylinder. Multi-point fuel injection is a widely used fuel injection technology in car engines today, characterized by computer-controlled injection and precise fuel delivery. Gasoline engines rely on the combustion of the air-fuel mixture in the cylinder to operate, and the quality of the engine's performance largely depends on the quality of the mixture. The formation of the mixture, to a considerable extent, is determined by the type of fuel injection system. The fuel in the mixture must be atomized to fully mix with air, which aids in combustion.
Multi-point fuel injection sounds complicated, but it's actually quite simple. I always enjoy studying automotive technology, and this is essentially an upgraded fuel injection method for engines. In the past, there was single-point injection with just one injector spraying fuel into the intake manifold. Later, it evolved into multi-point fuel injection, where each cylinder has its own dedicated injector that sprays fuel directly near the intake valve. The benefits are numerous: more precise fuel delivery, higher combustion efficiency in the engine, resulting in powerful performance and better fuel economy. For example, when climbing hills or accelerating, multi-point injection can adjust fuel delivery based on each cylinder's needs, avoiding fuel waste. I've seen many older cars show noticeable performance improvements and reduced noise after upgrading to this system. The downside is slightly higher cost, but the long-term fuel savings make it worthwhile. In short, multi-point fuel injection makes vehicles more environmentally friendly by reducing exhaust emissions, and it's now standard in most modern cars.
