Patent ID: 9376995
Filing Date: 2016-06-28
CPC Classification: F02M

Claim Text:
1. A fuel supply apparatus for a Gasoline Direct Injection (GDI) engine having reduced pressure pulsation, the fuel supply apparatus comprising: a low pressure fuel pump installed at one side of a fuel tank; a high pressure fuel pump installed in the engine and connected with the low pressure fuel pump via a fuel supply line; a pressure sensor which is configured to measure a fuel pressure of the fuel supply line between the low pressure fuel pump and the high pressure fuel pump and output to an Electronic Control Unit (ECU); and a pulsation relief valve which is installed between the pressure sensor and the high pressure fuel pump, wherein the pulsation relief valve comprises: wherein the pulsation relief valve is configured to allow the fuel pressurized in the fuel supply line to pass through only the orifice part in a direction from the high pressure fuel pump to the low pressure fuel pump.