[특허]Dual fuel engine having governor controlled pilot fuel injection system

Dual fuel engine having governor controlled pilot fuel injection system 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02M-021/02
출원번호	US-0377279 (1995-01-23)
발명자 / 주소	Beck Niels J. (Bonita CA) Barkhimer Robert L. (Poway CA) Weseloh William E. (San Diego CA)
출원인 / 주소	Servojet Products International (San Diego CA 02)
인용정보	피인용 횟수 : 54 인용 특허 : 0

초록 ▼

A compression ignition engine can be quickly and easily converted into a dual fuel engine simply by adding a gaseous fuel supply system, by disconnecting the governor actuating lever from the throttle pedal, and by adding an electronic controller which controls the operation of the gaseous fuel supply system and which sets the governor actuating lever at a position which causes the engine to deliver pilot fuel at a desired quantity. Operation is simplified by setting the governor using a droop control technique inherent in governor operation. The system can be automatically calibrated to assure the supply of fuel at a precisely controlled quantity per stroke at all engine speeds. The pilot fuel injection system of the resulting engine is non-invasive and permits inherent safety features of the governor to be retained.

대표청구항 ▼

A method comprising: (A) providing a dual fuel internal combustion engine which includes (1) a combustion cylinder, (2) a primary fuel supply system which supplies a primary gaseous fuel to said combustion cylinder, (3) a pilot fuel supply system which supplies a liquid pilot fuel to said combustion cylinder and which includes a pump and a fuel supply rack which is connected to said pump and which is movable to vary the fuel delivery quantity per stroke of said pump, and (4) a governor, wherein said governor includes an actuating lever the position of which determines the position of said rack and a portion of which is positioned externally of said engine; (B) commanding an engine operating condition; (C) sensing engine operating conditions; (D) determining, based upon said steps (B) and (C), a desired pilot liquid fuel delivery quantity per stroke required for the commanded engine operating condition; (E) determining, based upon said steps B and C, a desired primary gaseous fuel delivery rate required for the commanded engine operating condition; (F) supplying said primary fuel to said combustion cylinder from said primary fuel supply system at said desired primary fuel delivery rate; (G) determining, based upon said step (D), a governor setting required to cause said pump to supply said pilot liquid fuel at said desired pilot liquid fuel delivery quantity per stroke; and (H) during said step (F), automatically displacing said portion of said governor actuating lever to move said rack to a position which causes said pump to deliver said pilot liquid fuel at said desired quantity per stroke, wherein said steps (F) and (H) continue during engine speed changes.

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Dual fuel engine having governor controlled pilot fuel injection system 원문보기

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