CUMMINS DIESEL FUEL SYSTEMS
Over the years
Cummins has produced a series of innovations, such as the first automotive diesel, in
addition to being the first to use supercharging and then turbocharging. All cylinders are
commonly served through a low-pressure fuel line. The camshaft control of the mechanical
injector controls the timing of injection throughout the operating range. This design
eliminates the timing-lag problems of high-pressure systems.
Environmental Protection Agency (EPA) exhaust emissions standards, Cummins offers the
Celect (electronically controlled injection) system.
Celect system did not start production until 1989, there are literally thousands of
Cummins with pressure-time (PT) fuel systems. We will discuss the operation of the PT
system first, then discuss the basic operating concept of the Celect system.