Control strategy for a throttled inlet, high pressure, diesel engine oil pump

A control for a throttled inlet oil pump to control oil pressure in a rail that serves injectors of a diesel engine, the control comprising:

• a processor that processes certain data to develop data for selectively restricting a throttle at the pump inlet, the processor processing data to develop error data defining error between a desired injector control pressure in the rail and actual injector control pressure in the rail;
• and
• wherein the processor further comprises offset data values correlated with values of the error data, the processor adds a correlated offset data value to a prevailing value of error data to introduce an offset into the prevailing error data value thereby creating an offset error data value, and the processor further processes the offset error data value to create a value for the data that establishes the throttle restriction.