Engine reversing and timing control mechanism in a heat regenerative engine
In an engine having at least one cylinder with a reciprocating piston and a connecting rod for driving rotation of a crank disk and a crankshaft, a cam sleeve is moved along the crankshaft in response to a change in engine speed. The cam sleeve is coupled to a cam ring that moves with the cam sleeve and in a spiraling motion about the longitudinal axis of the crankshaft. A follower engages an outer face of the cam ring and is movable against a push rod that opens an injector valve. The follower is structured and disposed to move in response to contact with a lobe on the outer face of the cam ring to urge the push rod against the injector valve. The follower changes position on the cam ring as the cam ring is moved in the spiraling motion, causing the follower to be exposed to a progressive change in profile of the lobe, resulting in a varying degree of movement of the follower to thereby control timing and duration of momentary opening of the injector valve and injection of pressurized steam into the cylinder.
1. An engine reversing and timing control assembly in an engine comprising:
at least one cylinder;
a piston movably captivated within said cylinder and structured and disposed for sealed, reciprocating movement within said cylinder;
a crankshaft;
a crank disk linked to said crankshaft and rotatable to drivingly rotate said crankshaft;
a connecting rod pivotally connected between said piston and said crank disk;
an injector valve operable between a closed position and an open position to release a pressurized charge of steam into said cylinder to move said piston;
a pushrod having a first end and a second end;
a spring biased rocker arm operatively engaged with said pushrod and said injector valve;
a cam ring movably mounted on said crankshaft and including an outer circumferential face;
a lobe bulging outwardly from said cam ring about a portion of said outer circumferential face of said cam ring, and said lobe having a profile that progressively changes longitudinally from a maximum radially bulging profile to a minimum radially bulging profile;
a cam sleeve axially movable on the longitudinal axis of said crankshaft and coupled to said cam ring to cause said cam ring to move longitudinally with said cam sleeve and to further cause said cam ring to partially rotate about the longitudinal axis of the crankshaft in a spiraling motion upon forced longitudinal movement of said cam sleeve and said cam ring relative to said crankshaft; and
a follower operatively contacting said cam ring and said first end of said pushrod, said follower being structured and disposed to move in response to contact with said lobe on said cam ring and to urge said pushrod against said injector valve upon said follower contacting said lobe on said cam ring to momentarily open said injector valve as said cam ring rotates with said cam sleeve and said crankshaft.
2. The assembly as recited in claim 1 wherein said cam sleeve and said cam ring are operatively moved relative to said crankshaft in response to a change in engine speed to move said lobe on said cam ring relative to said follower so that said follower is exposed to said radially bulging profile of said lobe in direct proportion to the engine speed to thereby control timing and duration of opening of said injector valve.
3. The assembly as recited in claim 1 wherein said progressive change of profile of the outward bulge of said lobe between said maximum radially bulging profile and said minimum radially bulging profile and the change of positioning of contact of said follower with said progressive change of profile of the outward bulge of said lobe operatively vary the degree of movement of said follower to control timing and duration of the momentary opening of said injector valve to inject the pressurized charge steam into said cylinder.
4. The assembly as recited in claim 1 further comprising:
a shift rod operatively linked to said cam sleeve to move said cam sleeve and said cam ring relative to said crankshaft and said follower with said engine at idle, causing the timing position of said lobe to change relative to said follower so that said injector valve is momentarily open to release the pressurized charge of steam into said cylinder, thereby forcing said piston and said connecting rod through a downward stroke that urges movement of said crank disk at an angle relative to said crankshaft in a direction of reverse rotation.