Dual fuel injection nozzle

• US 3,977,367 A
• Filed: 10/21/1974
• Issued: 08/31/1976
• Est. Priority Date: 10/21/1974
• Status: Expired due to Term

• Current Assignee: Rotary Power International, Inc.
• Original Assignee: Curtiss-Wright Corporation
• Inventors: Roberts, Thomas C.
• Primary Examiner(s): Husar, C. J.
• Assistant Examiner(s): Smith, Leonard
• Application Number:
  US05/516,758
• Time in Patent Office: 680 Days
• Field of Search: 123/8.09, 123/8.11, 123/8.13, 123/30 B, 123/32 F, 123/32 JV, 239/418, 239/533, 239/549
• US Class Current: 123/206
• CPC Class Codes: F02B 17/005 having direct injection in the combustion chamber
• CPC Class Codes: F02B 2053/005 Wankel engines
• CPC Class Codes: F02B 2075/125 Direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber
• CPC Class Codes: F02B 53/10 Fuel supply; Introducing fuel to combustion space
• CPC Class Codes: F02M 2200/44 Valves, e.g. injectors, with valve bodies arranged side-by-side
• CPC Class Codes: F02M 45/086 Having more than one injection-valve controlling discharge orifices
• CPC Class Codes: F02M 59/08 characterised by two or more pumping elements with conjoint outlet or several pumping elements feeding one engine cylinder feeding common rails F02M63/0225
• CPC Class Codes: F02M 61/1806 characterised by the arrangement of discharge orifices, e.g. orientation or size
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

A rotary combustion engine designed for operation as a stratified charge engine with two separately controllable fuel injection means combined into a single unitary fuel injection nozzle structure.

Claims

1. A rotary combustion engine comprising:

a. an outer body having an internal cavity, the peripheral surface of which has a multi-lobe profile, said outer body also having an air intake passage characterized by the absence of any air throttle valve and a combustion gas exhaust passage,

b. an inner body of generally polygonal profile mounted for relative rotation within said outer body, the apex portions of said inner body having sealing cooperation with said peripheral surface to define a plurality of working chambers which vary in volume in response to said relative rotation,

c. a dual fuel nozzle for supplying fuel to the engine working chambers, said dual fuel nozzle including a nozzle body mounted in the engine outer body and having nozzle tip means for discharging fuel into the engine working chambers through a recess in the inner surface of said outer body after the air intake charge therein has been substantially compressed, said nozzle body also having a first passageway for supplying fuel to said nozzle tip means for fuel discharge through said recess into the engine working chambers from a single orifice in said nozzle tip means and having a second passageway for supplying fuel to said nozzle tip means for fuel discharge through said same recess into the engine working chambers from a plurality of orifices in said nozzle tip means,

d. a pair of fuel pumps, one pump being for supplying fuel to said first nozzle passageway and its first opening means and the other pump being for supplying fuel to said second nozzle passageway and its second opening means,

e. a single spark plug carried by the outer body adjacent to the dual fuel nozzle with the electrode end of the spark plug being in communication with the engine working chambers through the same recess in the outer body inner surface through which the dual fuel nozzle discharges with at least a portion of the fuel discharged from the single orifice of the first passageway passing in close proximity to the electrode end of the spark plug for igniting the fuel as it discharges from said single orifice, the ignited fuel discharged from said single orifice functioning as a pilot burner for igniting the fuel discharged from the plurality of orifices of said second passageway, and

f. means for regulating the pump supplying fuel to said second passageway for varying the quantity of fuel discharged from its plurality of orifices into each working chamber so as to regulate the engine power output.