Which diesel system delivers high-pressure fuel to all injectors continuously?

The common rail system is designed to deliver high-pressure fuel to all injectors in a diesel engine continuously. This system operates by maintaining a centralized rail, or a reservoir, that is pressurized by a pump. As fuel is kept at a high pressure in the rail, it ensures that all injectors have immediate access to this pressurized fuel whenever needed.

One of the key advantages of this design is that it allows for multiple injections of fuel during each power stroke, which can enhance combustion efficiency, reduce emissions, and improve overall engine performance. The common rail system can also adjust the fuel pressure and timing based on various engine parameters, allowing for fine-tuning of the injection process and optimizing performance under different operating conditions.

In contrast, the mechanical injection system typically utilizes a series of pumps that operate independently, which may not provide continuous high-pressure fuel in the same manner. The direct injection system refers to the method of injecting fuel directly into the combustion chamber, but it doesn't imply a continuous delivery mechanism across multiple injectors like the common rail system does. Similarly, the inline pump system generally involves a traditional pump and injector setup that may not maintain the high pressure required for continuous delivery to all injectors simultaneously.