KR970069508A

KR970069508A - Fuel supply for natural gas vehicles

Info

Publication number: KR970069508A
Application number: KR1019960011782A
Authority: KR
Inventors: 황계상
Original assignee: 김영귀; 기아자동차 주식회사
Priority date: 1996-04-18
Filing date: 1996-04-18
Publication date: 1997-11-07

Abstract

본 발명은 천연가스 차량의 연료 공급장치에 관한 것으로, 연료의 공급원인 연료 탱크(1)와, 상기 연료 탱크로부터 엔진에 이르도록 설치된 연료 공급 파이프(2)와, 상기 연료 공급 파이프를 흐르는 연료의 압력을 적정의 압력으로 강하시키기 위한 레귤레이터(3)와, 상기 연료 공급 파이프의 단부에 설치된 연료 분배 파이프(5)와, 상기 연료 분배 파이프에 연결되어 공급되는 연료를 엔진의 실린더에 분사하는 수개의 인젝터(7) 및 흡기 매니폴드(8)를 포함하는 천연가스 차량의 연료 공급장치에 있어서, 엔진의 시동이 꺼짐과 동시에 작동하여 상기 연료 분배 파이프(5)내의 연료를 흡수하여 레귤레이터(3)로부터 연료 분배 파이프(5)까지의 라인 압력을 낮추는 감압수단(10)(11)(12)(13)을 구비하여 구성한 것이다. 이와 같은 본 발명은 엔진의 시동이 꺼짐과 동시에 감압수단이 작동하여 연료 분배 파이프내의 연료를 흡수하여 저장하므로, 레귤레이터로부터 연료 분배 파이프에 이르는 라인의 압력을 대기압 수준으로 낮출 수 있다. 또한 본 발명은 엔진의 시동이 다시 '온'되는 경우 감압수단에 임시 저장되어 있던 연료가 연료 분배 파이프로 공급되어 사용되므로 연료의 소모를 줄일 수 있고, 이와 같은 모든 연료의 사용으로 차량의 주행거리를 증가시킬 수 있다.The present invention relates to a fuel supply apparatus for a natural gas vehicle, comprising a fuel tank (1) serving as a fuel supply source, a fuel supply pipe (2) installed to reach the engine from the fuel tank, A fuel distribution pipe (5) provided at an end of the fuel supply pipe, and a plurality of fuel injection pipes connected to the fuel distribution pipe for injecting fuel supplied to a cylinder of the engine In the fuel supply system for a natural gas vehicle including an injector 7 and an intake manifold 8, the engine 1 is operated at the same time when the engine is turned off, so that the fuel in the fuel distribution pipe 5 is absorbed from the regulator 3 (10), (11), (12) and (13) for lowering the line pressure to the fuel distribution pipe (5). The present invention can lower the pressure of the line from the regulator to the fuel distribution pipe to the atmospheric pressure level because the decompression means operates and the fuel in the fuel distribution pipe is absorbed and stored at the same time the engine is turned off. Further, according to the present invention, since the fuel temporarily stored in the decompression means is supplied to the fuel distribution pipe when the engine is started again, the consumption of the fuel can be reduced. By using all of the fuel, Can be increased.

Description

Fuel supply for natural gas vehicles

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제2도는 본 발명에 의한 천연가스 차량의 연료 공급장치를 나타낸 계통도, 제3도는 본 발명의 요부를 이루는 감압수단의 구성 및 작용을 보인 단면도, 제4도는 제3도에 도시한 감압수단의 한 구성인 피스톤을 발췌하여 보인 정면도.FIG. 3 is a cross-sectional view showing the construction and operation of the decompression means constituting the main part of the present invention. FIG. 4 is a cross-sectional view of the decompression means of the natural gas vehicle according to the present invention. A front view of a piston, which is shown in an excerpt.

Claims

A regulator for regulating the pressure of the fuel flowing through the fuel supply pipe to an appropriate pressure, and a regulator for regulating the pressure of the fuel flowing through the fuel supply pipe A fuel supply apparatus for a natural gas vehicle, comprising: a fuel distribution pipe; and a plurality of injectors and an intake manifold connected to the fuel distribution pipe and injecting fuel supplied to a cylinder of the engine, And a pressure reducing means for absorbing the fuel in the fuel distribution pipe to lower the line pressure from the regulator to the fuel distribution pipe.

2. The fuel supply system according to claim 1, wherein the decompression means comprises an auxiliary tank arranged to communicate with the fuel distribution pipe, and a valve for selectively closing the connection passage between the auxiliary tank and the fuel distribution pipe, A piston for sucking the fuel in the fuel distribution pipe into the auxiliary tank while reciprocating the auxiliary tank in cooperation with the opening and closing operation of the shutoff valve and allowing the fuel in the auxiliary tank to flow into the fuel distribution pipe, Wherein the fuel discharged from the fuel distribution pipe is supplied again to lower the pressure in the fuel supply pipe and to reinforce the pressure at the time of restarting the fuel supply device.

3. The fuel supply apparatus for a natural gas vehicle according to claim 2, wherein an O-ring for airtightness is interposed in an auxiliary tank contact portion of the piston.

※ Note: It is disclosed by the contents of the first application.