Patent ID: 9581296
Date: 2017-02-28
CPC Classifications: F02D,F02M,F04B,F17C,F25B,Y02T

Claim:
1. A system for supplying LNG fuel, the system comprising: a fuel supplying line connected from an LNG storage tank to an engine; a boosting pump provided on the fuel supplying line and configured to pressurize LNG outputted from the LNG storage tank, and cool down in a standby mode; a high pressure pump configured to pressurize the LNG outputted from the boosting pump to high pressure; and a return line connected between the LNG storage tank and the high pressure pump, wherein the LNG is returned to the LNG storage tank through the return line, wherein the return line is connected to an internal surface of the high pressure pump, wherein during the standby mode the LNG is not outputted from the high pressure pump to the engine and the return line connected to the high pressure pump is configured to be open, wherein the LNG is returned from the high pressure pump to the LNG storage tank through the return line when a cool-down operation of the high pressure pump is performed, and wherein the boosting pump is configured to operate during the standby mode to increase a flow of the LNG supplied to the high pressure pump.