IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0415046
(2002-08-29)
|
우선권정보 |
JP-2001-259847(2001-08-29) |
국제출원번호 |
PCT/JP02/008727
(2002-08-29)
|
§371/§102 date |
20030423
(20030423)
|
국제공개번호 |
WO03/018982
(2003-03-06)
|
발명자
/ 주소 |
- Goto,Satoru
- Nishi,Yoshifumi
|
출원인 / 주소 |
- Niigata Power Systems Co., Ltd.
|
대리인 / 주소 |
Ostrolenk, Faber, Gerb &
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
4 |
초록
▼
The gas engine of the present invention has a pilot oil fuel valve, a pilot oil pump, and first and second pipes connected to a pilot oil main pipe, for each of a plurality of combustion chambers. An operating pilot oil tank and an ignition stimulant-added pilot oil tank are connected via a switchin
The gas engine of the present invention has a pilot oil fuel valve, a pilot oil pump, and first and second pipes connected to a pilot oil main pipe, for each of a plurality of combustion chambers. An operating pilot oil tank and an ignition stimulant-added pilot oil tank are connected via a switching valve to a third pipe, connected to an end of the pilot oil main pipe. Before operating stops, the pilot oil is discharged by opening an exhaust valve, and thereafter, the switching valve is switched and pilot oil which the ignition stimulant has been added to is supplied into the pipe. Consequently, the pilot oil downstream from the main pipe is replaced with the pilot oil which the ignition stimulant has been added to. Therefore, at the time of the next activation, pilot oil which the ignition stimulant has been added to is sprayed from the fuel valve, and, as a result, misfire at the time of activation is reduced, and a highly reliable engine is obtained.
대표청구항
▼
The invention claimed is: 1. A pilot oil ignition type gas engine having a plurality of pilot oil injection valves provided in a plurality of combustion chambers, a plurality of pilot oil pumps provided to each of the pilot oil injection valves, a plurality of first pipes which connect the pilot oi
The invention claimed is: 1. A pilot oil ignition type gas engine having a plurality of pilot oil injection valves provided in a plurality of combustion chambers, a plurality of pilot oil pumps provided to each of the pilot oil injection valves, a plurality of first pipes which connect the pilot oil injection valves with the corresponding pilot oil pumps, a main pilot oil pipe, a plurality of second pipes which connect the pilot oil pumps to the main pilot oil pipe, an operating pilot oil tank, and a third pipe which connects an end of the main pilot oil pipe to the operating pilot oil tank; wherein a pilot oil exhaust valve to discharge the pilot oil in the main pilot oil pipe and the third pipe being provided at another end of the main pilot oil pipe, and an ignition stimulant-added pilot oil tank being connected to the third pipe via a flow adjusting valve. 2. The pilot oil ignition type gas engine as described in claim 1, wherein a pressure pump for mixing an ignition stimulant into the pilot oil inside the pipe is provided between the ignition stimulant tank and the flow adjusting valve. 3. The pilot oil ignition type gas engine as described in claim 1, wherein the head height to the ignition stimulant tank is higher than the head height to the operating pilot oil tank. 4. A pilot oil ignition type gas engine having a plurality of pilot oil injection valves provided in a plurality of combustion chambers, a plurality of pilot oil pumps provided to each of the pilot oil injection valves, a plurality of first pipes which connect the pilot oil injection valves with the corresponding pilot oil pumps, a main pilot oil pipe, a plurality of second pipes which connect the pilot oil pumps to the main pilot oil pipe, an operating pilot oil tank, and a third pipe which connects an end of the main pilot oil pipe to the operating pilot oil tank; wherein a pilot oil exhaust valve being provided at another end of the main pilot oil pipe, ignition stimulant-added pilot oil tank being connected to the third pipe via a flow adjusting valve, and the pilot oil exhaust valve and the operating pilot oil tank are connected by a fourth pipe, and pilot oil discharged from the pilot oil exhaust valve is returned to the operating pilot oil tank. 5. An operating method for a pilot oil ignition type gas engine which is compression-ignited by pilot oil sprayed from a pilot oil fuel valve into a combustion chamber, which is connected to an operating pilot oil tank, wherein the pilot oil which is sprayed into the combustion chamber at the time of activation comprising ignition stimulant-added pilot oil, and before operating stops, at least part of the pilot oil inside the pilot oil fuel valve and the pipe from the operating pilot oil tank to the pilot oil fuel valve is replaced to the ignition stimulant-added pilot oil, so that the ignition stimulant-added pilot oil is sprayed into the combustion chamber at the time of the next activation. 6. A method of operating an oil ignition type gas engine, comprising: supplying a stimulant-pilot oil mixture to a pilot oil fuel valve in a combustion chamber of an oil ignition type gas engine; then, activating the oil ignition type gas engine; waiting until the oil ignition type gas engine reaches a rated operation; and supplying a first pilot oil to the pilot oil fuel valve after the oil ignition type gas engine reaches the rated operation, the first pilot oil being different than the stimulant-pilot oil mixture, wherein the oil ignition type gas engine is previously activated prior to supplying the stimulant-pilot oil mixture to the pilot oil fuel valve, and the step of supplying the stimulant-pilot oil mixture to the pilot oil fuel valve is performed by replacing the pilot oil inside the pipes for supplying the pilot oil to the pilot oil fuel valve with the ignition stimulant-added pilot oil during the previous activation of the oil ignition type gas engine. 7. The method of claim 6, wherein the step of activating the oil ignition type gas engine includes activating a spark plug in the combustion chamber. 8. The method of claim 7, further comprising: deactivating the spark plug after the oil ignition type gas engine reaches the rated operation. 9. The method of claim 9, wherein the stimulant-pilot oil mixture supplied to the pilot oil fuel valve during the previous activation of the oil ignition type gas engine includes a second pilot oil and an ignition stimulant. 10. The method of claim 9, wherein the ignition stimulant is selected to increase a cetane value of the second pilot oil. 11. The method of claim 10, wherein the cetane value is increased by 5 to 15 percent. 12. The method of claim 9, wherein the first and second pilot oils are the same pilot oil.
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