Patent ID: 9163768
Filing Date: 2015-10-20
Classification: B60H,F01P,F02M,Y10T

Abstract:
1. A return fuel cooling system for a liquefied petroleum injection (LPI) vehicle having an engine and a bombe connected to each other through a fuel supply line and a fuel return line in the LPI vehicle using liquefied petroleum gas (LPG) fuel to cool high-temperature LPG fuel returning from the engine to the bombe, the return fuel cooling system comprising: a heat exchanger mounted on the fuel return line and configured to heat exchange coolant supplied thereto and circulating from an air conditioning unit, in which the coolant circulates, with the LPG fuel to cool the LPG fuel; a bypass line connecting upstream and downstream of the fuel return line, wherein the heat exchanger is interposed between the upstream and the downstream of the fuel return line to make the LPG fuel returning to the bombe bypass the heat exchanger and supply the LPG fuel to the bombe; a temperature sensor; and a valve to which the fuel return line and the bypass line are connected, and selectively opening or closing the fuel return line connected with the heat exchanger according to a temperature of the bombe measured by the temperature sensor to make the LPG fuel flow in the heat exchanger or the LPG fuel flow through the bypass line, wherein the return fuel cooling system is controlled by: