Patent ID: 7735472
Filing Date: 2010-06-15
Classification: F02D,F02M

Abstract:
1. A high-pressure fuel supply apparatus comprising: a high-pressure fuel supply system for supplying under pressure fuel delivered from a low-pressure fuel pump to a common rail by a high-pressure fuel pump and further supplying the pressurized fuel to an injector for directly injecting the fuel in the common rail into a combustion chamber; a pressure control valve for controlling pressure in the common rail by returning fuel to a low-pressure side when the pressure increases to a predetermined value or more; a device for detecting the pressure in the common rail; and a control device for controlling the pressure in the common rail; wherein, when the high-pressure fuel supply apparatus or a control system of said high-pressure fuel supply apparatus causes malfunction so that the pressure in the common rail increases, a maximum pressure point in the common rail is no higher than a pressure that does not affect at least one of a flow characteristic and a spray characteristic of the injector after recovery from the malfunctioning state.