Liquefied petroleum gas injection (lpi) system, and method for preventing gas leakage and poor starting performance using the same

Abstract

A liquid gas jetting system includes: fuel-tank filled with LPG; Gas jet mounted in engine combustion chamber; Fuel supply pipe and fuel reflux pipe for connecting the fuel-tank and the gas jet; fuel pump mounted on the fuel-tank and for supplying fuel to the gas jet via the fuel supply pipe; multiple-way valve and checking-valve mounted on the fuel supply pipe; fuel pressure regulator, pressure sensor, and temperature sensor on the fuel reflux pipe; coolant temperature sensor and intake temperature sensor; bypass pipe branching from the fuel reflux pipe and for connecting the gas jet and the fuel-tank; auxiliary fuel tank mounted in the fuel-tank and for temporary storage of the fuel collected from the bypass pipe; Fuel supply pipe valve, fuel reflux pipe valve and bypass pipe valve are respectively mounted on the fuel supply pipe, fuel reflux pipe and bypass pipe for switching the same. The residual fuel in the fuel supply pipe and the fuel reflux pipe near the engine can be collected into the auxiliary fuel tank by the said components.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 10-2006-0024263 filed in the Korean Intellectual Property Office on March 16, 2006, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to a liquefied petroleum gas injection (LPI) system and a method of using the system to prevent fuel leakage and poor starting performance. [0004] More particularly, the present invention relates to an LPI system and a method using the system to prevent fuel leakage and poor starting performance by preventing leakage in an LPI injector, which improves starting performance and reduces exhaust gas. Background technique [0005] In general, a Liquefied Petroleum Injection (LPI) vehicle means that a fuel pump is installed in a fuel tank of an LPG vehicle, the LPG is pressurized and becomes liquid, and the fuel is injected through a gas inje...

AI Technical Summary

Problems solved by technology

[0035] However, especially after short stops, there are often problems with reduced starting performance

[0036] In addition, since the engine room temperature rises and the fuel evaporates, there is a problem of lean fuel supply, which reduces vehicle efficiency, and the driver has to wait until the fuel pressure rises to a predetermined fuel pressure

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