Patent ID: 7243636
Filing Date: 2007-07-17
Classification: F02B,F02D,Y02T

Abstract:
1. A method for operating a fuel metering system of a motor vehicle during a starting phase of an internal combustion engine to increase a fuel pressure in at least one high pressure area to an operating pressure, a fuel being delivered by at least one supply pump to the at least one high pressure area and being injected by at least one fuel injector from the high pressure area directly into at least one combustion chamber, the method comprising: detecting a pressure in the high pressure area using at least one sensor; adjusting the pressure in the high pressure area using at least one pressure regulating element; and setting a limit to a rate of change in pressure in the high pressure area as a function of a specified value for an injection quantity error caused by pressure changes during a lag between a first time at which a fuel injection time is computed and a second time at which fuel injection begins.