Patent ID: 7891338
Filing Date: 2011-02-22
Classification: F02D,F02M

Abstract:
1. A regulating device for a regulating pressure/flow in a fuel injection system of an internal combustion engine, wherein a common rail ( 6 ) of pressurized fuel is supplied by a high-pressure pump ( 7 ) along a delivery pipe ( 8 ), said high-pressure pump ( 7 ) having an intake valve ( 25 ) in communication with a low-pressure pump ( 9 ) and a delivery valve ( 30 ) in communication with said delivery pipe ( 8 ), said high-pressure pump ( 7 ) being operated in synchronism with a motor shaft ( 4 ), and wherein the required fuel pressure of the common rail ( 6 ) is defined by an electronic control unit ( 16 ) as a function of the operating conditions of the engine ( 2 ), said regulating device comprising: a solenoid bypass valve ( valve means ( wherein said predetermined sharp pressure-reduction threshold (Δp) is formed by a difference of pressure between the actual fuel pressure in said common rail ( said second non-return valve (