Fuel supply system for LPG vehicle
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsJae Min Lee, Jong Ki Kim, Chang Han Kim
Life of this patent
Estimating the term…
Abstract
A returnless fuel supply system applicable to an LPG vehicle is provided. The system supplies LPG fuel from an LPG bombe to an engine at a predetermined pressure or greater and prevents the generation of vapor in the LPG fuel, thereby eliminating a need to return a portion of the LPG fuel supplied to the engine to the LPG bombe. Through the application of the returnless fuel supply system that does not return the high temperature fuel to the LPG bombe, the cause of the internal pressure increase in the LPG bombe is eliminated, and thus efficient refueling of LPG bombe with LPG fuel is achieved.
Claims9
A fuel supply system for a liquefied-petroleum-gas (LPG) vehicle, comprising:
- a first fuel supply line connected to an engine and to a fuel pump mounted in an LPG bombe;
- a 3-way solenoid valve mounted on a rear end portion of the first fuel supply line;
- a regulator mounted on a front end portion of the first fuel supply line and include a solenoid valve that allows or blocks a flow of LPG fuel toward the engine and a pressure sensor configured to measure a pressure in a fuel line through which the LPG fuel flows;
- a second fuel supply line branched from the 3-way solenoid valve and connected to the first fuel supply line near a regulator inlet;
- an auxiliary pump assembly mounted on the second fuel supply line to pressurize the fuel flowing through the second fuel supply line to a reference pressure or greater and remove vapor contained in the fuel;
- and
- a controller configured to turn the 3-way solenoid valve on or off and operate the auxiliary pump assembly.
Dependencies are inferred from the claim text.