Patent ID: 6415770
Filing Date: 2002-07-09
Classification: F02D,F02M

Abstract:
A high-pressure fuel supply system for an internal combustion engine, comprising:a pressure raising mechanism that is operable to raise a pressure in a high-pressure portion of the fuel supply system to a first level during a start of the internal combustion engine, the pressure raising mechanism comprising a pressure wall that is displaceable from an original position so as to reduce a volume of the high-pressure portion and thereby raise the pressure in the high-pressure portion, the pressure wall being displaceable in a predetermined displacement range between the original position and a maximum displacement position; and a high-pressure pump that is operable to raise the pressure in the high-pressure portion of the fuel supply system to a second level that is higher than the first level after the start of the internal combustion engine, the pressure wall being returned to the original position while the pressure in the high-pressure portion is raised by the high-pressure pump to the second level, wherein the pressure wall is spaced apart from the maximum displacement position of the predetermined displacement range when the pressure in the high-pressure portion that is raised by the pressure raising mechanism reaches the first level, so that the pressure wall is able to further displace toward the maximum displacement position so as to raise the pressure in the high-pressure portion when the internal combustion engine is re-started after the engine is stopped before the pressure wall is returned to the original position.