Which is better, multi-point fuel injection or direct injection? What are the differences?

[LaRichard]

Direct injection is better. The differences between multi-point fuel injection and direct injection are as follows: 1. Differences in maintenance. Direct injection diesel engines have lower daily maintenance costs and generate higher torque during operation, providing strong power. However, the drawbacks are also evident. Due to the generally low quality of domestic fuel, abnormal diesel supply can easily lead to increased carbon deposits in the cylinders, reduced power, lower engine speed, and difficulties in ignition and starting. In contrast, electronically controlled fuel injection diesel engines can achieve good compatibility with hydraulic systems. The downside is that they require higher fuel quality, and the maintenance costs are relatively higher compared to direct injection engines. Additionally, severely damaged components often require manufacturer repairs, making it difficult for individuals or small workshops to fix them. 2. Differences in energy efficiency and environmental protection. Direct injection engines have strong adaptability to fuel quality, but the fuel cannot be completely burned, resulting in higher fuel consumption and being less environmentally friendly. Electronically controlled fuel injection engines have relatively higher requirements for fuel quality, but they ensure complete fuel combustion, offering better fuel efficiency and environmental protection.