[특허]Gas-diesel dual fuel engine

Gas-diesel dual fuel engine 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02M-039/00
출원번호	US-0389093 (1982-06-16)
우선권정보	JP-0089486 (1981-06-19); JP-0089487 (1981-06-19); JP-0089488 (1981-06-19); JP-0089489 (1981-06-19); JP-0089490 (1981-06-19)
발명자 / 주소	Tanaka Mitsuo (Ibaraki JPX)
출원인 / 주소	Yanmar Diesel Engine Co., Ltd. (Osaka JPX 03)
인용정보	피인용 횟수 : 51 인용 특허 : 0

초록 ▼

A gas-diesel dual fuel engine operative with both a gaseous fuel and a diesel fuel oil. The engine has an electronic governor circuit adapted to receive both a speed signal representing actual speed of engine and a set speed signal representing a predetermined command speed of the engine, electric actuators adapted to actuate a diesel fuel injection pump and a gaseous fuel regulating valve, respectively, in response to the signal from the electronic governor circuit, and a mode switching control circuit connected to the electronic governor circuit and adapted to switch the operation of the electric actuators between a diesel fuel operation mode and a gaseous fuel operation mode.

대표청구항 ▼

In a gas-diesel dual fuel engine apparatus having a diesel engine, a diesel fuel supply system including a diesel fuel injection pump, a gaseous fuel supply system including gaseous fuel regulating valve, and a governing and controlling device for governing the speed of said engine and controlling the switchover of the operation of said engine between a diesel fuel mode and a gaseous fuel mode; the improvement that said governing and controlling device comprises: (a) first and second electronic governor means adapted to compare a speed signal representing the actual operating speed of said diesel engine with a set speed signal representing the set speed thereof and to perform a proportional plus integral plus differential operation on the basis of the difference therebetween for outputting respective control signals, according to the difference between said two speed signals, for the engine\s diesel fuel mode and gaseous fuel mode; (b) a pair of electric actuator means having respective power amplifier circuits and mechanically connected to said diesel fuel injection pump and said gaseous fuel regulating valve, respectively, for the actuation thereof; (c) mode switching control means for controlling the switch-over of said governing and controlling device between the engine\s diesel fuel operation mode and gaseous fuel operation mode, said mode switching control means being adapted to generate command signals for fully closing said gaseous fuel regulating value when the engine is in the diesel fuel operation mode and for operating said diesel fuel injection pump to feed said diesel engine with a predetermined amount of a diesel fuel as pilot injection fuel when the engine is in the gaseous fuel operation mode; and (d) signal selecting means connecting said first and second electronic governor means and said mode switching control means to said pair of electric actuator means for selectively delivering said control signals and said command signals, said signal selecting means being controlled by said mode switching control means so that when the engine is in the diesel fuel operation mode, the appropriate control signal is delivered to said electric actuator means connected with said diesel fuel injection pump to operate said pump and the associated command signal is delivered to said electric actuator means connected with said gaseous fuel regulating valve to close said valve, while when the engine is in the gaseous fuel operation mode, the then appropriate control signal is delivered to said electric actuator means connected with said gaseous fuel regulating valve and the then associated command signal is delivered to said electric actuator means connected with said diesel fuel injection pump to operate said pump for the pilot injection; (e) said signal selecting means comprising first and second minimum value selection circuits which connect said first and second electronic governor means to respective electric actuator means and each of which is adapted to compare the respective control signal from the corresponding electronic governor means with the associated command signal from said mode switching control means and to output only parts of said control signals lower than and equal to said command signals, and said mode switching control means comprising a voltage generating circuit which is adapted to generate a zero voltage signal, a pilot injection signal, a false set speed signal higher than said set speed signal and an upper limit voltage signal respresenting the upper limit of usable voltage, said voltage generating circuit being operable to input said zero voltage signal and said upper limit voltage signal to said second and said first minimum value selection circuits, respectively, when the engine is in the diesel fuel mode so that said gaseous fuel regulating valve is fully closed and said diesel fuel injection pump is operated according to said control signal from said first electronic governor means, said voltage generating circuit being further operable to input said upper limit voltage signal, said false set speed signal and said pilot injection signal to said second minimum value selection circuit, said first electronic governor means and said first minimum value selection circuit, respectively, when the engine is in the gaseous fuel mode so that said gaseous fuel regulating valve is operated according to said control signal from said second electronic governor means and said first electronic governor means outputs a control signal higher than said pilot injection signal by means of an integral action of the proportional plus integral plus differential operation to keep said diesel fuel injection pump operating to feed said engine with the predetermined amount of pilot injection fuel.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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연합인증

Gas-diesel dual fuel engine 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

이 특허를 인용한 특허 (51)

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Gas-diesel dual fuel engine 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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이 특허를 인용한 특허 (51)

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