Variable cycle three-stroke engine
OwnerMichael A. V. Wardinventor
Life of this patent
Estimating the term…
Abstract
A virtual three-stroke engine (1) with intake and compression strokes approximately one half of the power stroke of approximately 12 to one expansion ratio and with total firing cycle stroke lengths equal to approximately three expansion strokes to minimize engine throttling and frictional losses over the real world drive cycle and provide high torque from a one-to-one drive shaft RPM to engine firing cycle RPM provided by a cam type driver for controlling the piston motions and extracting the power from the piston.
Claims30
Virtual three-stroke electrically ignited internal combustion engine comprising:
- (a) means defining at least one relatively fixed chamber for accommodating volume reduction and increase with a movable volume reducing-increasing member therein and defining a zone between the member and the walls of the chamber for variable volume as the movable member moves;
- (b) means for admitting air and fuel to said zone and igniting a compressed air-fuel mixture charge in said zone;
- (c) power transmission means outside the chamber constructed and arranged for being cyclically driven by, and for driving, the said movable member;
- (d) said cyclically movable member producing a complete engine firing cycle as a result of its motion comprising an air intake portion, an air-fuel mixture compression portion including mixture ignition portion, a mixture combustion and expansion power portion comprised of a complete expansion power stroke defining a maximum displacement of said chamber volume Vd, and a burnt gas exhaust portion, and
- (e) means for effecting said motions of the member comprising said firing cycle constructed and arranged such that the sum of all stroke displacements of said motions comprising said firing cycle equals between 21/2 and 31/2 times the displacement of said expansion power stroke maximum displacement Vd for at least one operating condition of the engine.
Virtual three-stroke electrically ignited internal combustion engine comprising:
- (a) means defining at least one relatively fixed chamber for accomodating volume reduction and increase with a movable volume reducing-increasing member therein and defining a zone between the member and the walls of the chamber for variable volume as the movable member moves;
- (b) means for admitting air and fuel to said zone and igniting a compressed air-fuel mixture charge in said zone;
- (c) power transmission means outside the chamber constructed and arranged for being cylically driven by, and for driving, the said movable member;
- (d) said cyclically movable member producing a complete engine firing cycle as a result of its motion comprising an air intake portion, an air-fuel mixture compression motion including mixture ignition portion, a mixture combustion and expansion power motion comprised of a complete expansion power stroke defining a maximum displacement of said chamber volume Vd, and a burnt gas exhaust portion
- wherein said intake air portion comprises an intake stroke of total displacement volume Vi wherein Vi is varied and increases with increased engine power over some range of engine power.
An electrically ignited internal combustion, IC, engine including an air-fuel mixture admitting stroke of length Li, a mixture compression and ignition stroke of length Lc, an expansion power stroke of length Lp representing the longest of the strokes and corresponding to the total engine displacement, and an exhaust stroke Le, wherein for at least one operation of said engine said intake stroke Li is approximately 1/2 of the expansion stroke Lp and the compression stroke is approximately equal to or greater than the intake stroke Li.
An electrically ignited internal combustion, IC, engine having at least one piston and one cylinder and including an air-fuel mixture admitting intake stroke of length Li, a mixture compression and ignition stroke of length Lc, an expansion power stroke of length Lp representing the longest of the strokes and corresponding to the total engine displacement, and an exhaust stroke Le, wherein for at least one operation of said engine said intake stroke Li is approximately 1/2 of the expansion stroke Lp and the compression stroke is approximately equal to or greater than the intake stroke Li, and wherein said differing stroke lengths are produced by cam driver means of asymmetric generally elliptical shape in a track on whose edge or near whose edge ride one end of connecting rods whose other ends are rigidly connected to pistons, said cam driver means mounted on a drive shaft whose axis is perpendicular to the connecting rods.
Dependencies are inferred from the claim text.