Stratified charge rotary engine (method of operation)

• US 3,960,115 A
• Filed: 10/04/1974
• Issued: 06/01/1976
• Est. Priority Date: 10/04/1974
• Status: Expired due to Term

• Current Assignee: Rotary Power International, Inc.
• Original Assignee: Curtiss-Wright Corporation
• Inventors: Myers, David M., Lamping, Harold D.
• Primary Examiner(s): Husar, C. J.
• Assistant Examiner(s): Smith, Leonard
• Application Number:
  US05/512,342
• Time in Patent Office: 606 Days
• Field of Search: 123/8.09, 123/8.11, 123/8.13
• US Class Current: 123/206
• 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 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 59/265 characterised by the arrangement or form of spill port of spill contour on the piston F02M45/066 takes precedence
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

A rotary combustion engine having two fuel nozzles for discharging fuel into each engine working chamber with fuel being discharged from only one of the nozzles during low power operation of the engine and being discharged from both nozzles during high power operation of the engine.

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 and a combustion gas exhaust passage, said air-intake passage being characterized by the absence of any air throttling valve,

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. first and second fuel nozzles each mounted on said outer body for discharging fuel into each engine working chamber after the air charge therein has been substantially compressed,

d. mechanism for regulating the fuel discharged by said nozzles into each engine working chamber, said mechanism including a single engine power control member operable for adjusting said mechanism so that during a relatively low power range of movement of said member the quantity of fuel supplied by the second nozzle remains substantially constant at a relatively low value and the quantity of fuel supplied by the first nozzle progressively increases as said power control member is moved in a power increasing direction, while during a higher power range of movement of the power control member the quantity of fuel supplied by the second nozzle increases at a faster rate than that supplied by the first nozzle as the power control member is moved in a power increasing direction in said higher power portion of its range of movement, and

e. ignition means disposed immediately adjacent to said first fuel nozzle such that its electrodes are disposed in a recess in the outer body through which said first fuel nozzle discharges and such that said ignition means ignites fuel promptly as it discharges from said first fuel nozzle.

2. A rotary combustion engine as claimed in claim 1 and including a first positive displacement pump for supplying fuel to said first fuel nozzle and a second positive displacement pump for supplying fuel to said second fuel nozzle, each said pump comprising piston and cylinder members having a cooperating helical-like edge determining the effective stroke of said pump with one of said members of each pump being connected to the power control member for rotation thereby to vary the effective strokes of said pumps.