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Tag: camshaft lobes

In Focus: Diesel injection systems

Most engine makers specify an initial setting of overheads early in an engine’s life, just after it breaks in and settles down.

February 1, 2010

All Cummins ISX engines have the XPI common-rail injection system, which uses a crankshaft-driven pump to keep the fuel rail – seen of the left side of this 11.9L ISX – pressurized to more than 30,000 psi, providing full injection pressure to solenoid-activated injection nozzles in the head. Such systems provide maximum injection pressure even at low rpm and eliminate the need to adjust the injector rockers when doing overheads.

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