Abstract: A valve-operating lever comprising a valve arm including a first aperture defining a valve arm engagement portion. The lever also includes a connector member having an outside surface and a first stop. The connector member and the first stop cooperate to define a first engagement portion. A first portion of the connector member overlays a portion of the valve arm adjacent the first aperture, and the valve arm engagement portion engages the first engagement portion.

Abstract: An engine starting and stopping device for an internal combustion engine includes an energy storing mechanism having at least one elastic member such as a spring, an input element engageable with the elastic member and movable during engine coast down to load the elastic member, and an output element that is movable in response to the energy storing mechanism. The output element is movable in response to the energy storing mechanism as the elastic member unloads from the loaded state, to thereby move a rotatable member (i.e., a crankshaft and/or flywheel) of the engine during starting of the engine. An input control device is also provided for positioning the input element into engagement with the rotatable member of the engine such that rotation of the rotatable member moves the input element to load the elastic member during engine coast down and also to brake the engine.

Abstract: A starting and stopping device for an internal combustion engine includes an energy storing device including at least one elastic member. The elastic member is loaded in response to rotation of a main shaft, and the main shaft rotates in an unloading direction in response to unloading of the elastic member. A locking mechanism selectively prevents the elastic member from unloading from a loaded state by preventing the shaft from rotating in the unloading direction. A clutch mechanism is operatively disposed between the main shaft and the locking mechanism to permit rotation of the shaft in the unloading direction when a preselected torsional threshold between the shaft and the locking mechanism is reached.

Abstract: An internal combustion engine includes an engine housing, a crankshaft supported within the engine housing for rotation with respect to the engine housing, and a flywheel fixedly mounted to the crankshaft and rotatable with the crankshaft in a starting direction to start the engine. A coil spring has an outer end fixedly interconnected with respect to the engine housing, and an inner end. A unidirectional clutch has a portion connected to the inner end of the spring. The unidirectional clutch is characterized by an interference condition in which the unidirectional clutch couples the inner end of the spring to the flywheel such that the flywheel and crankshaft may be rotated in the starting direction in response to unloading of the spring. The unidirectional clutch is also characterized by a non-interference condition in which the inner end of the spring is uncoupled from the flywheel.

Abstract: An internal combustion engine includes an engine housing and a crankshaft supported for rotation within the engine housing and rotatable in a starting direction to start said engine. At least one cup is fixedly mounted to the crankshaft for rotation therewith. A starter shaft is supported by the engine housing for rotation. A spring housing includes a circumferential flange that defines an annular track with the at least one cup, and a spring is housed within the spring housing. The spring has a first end interconnected with the spring housing and a second end interconnected with the engine housing. A friction roller is movable into the annular track and into engagement with both of the circumferential flange and the at least one cup to cause rotation of the spring housing and loading of the spring in response to rotation of the crankshaft.

Abstract: An internal combustion engine includes an engine housing and a crankshaft supported for rotation within the engine housing and rotatable in a starting direction to start said engine. At least one cup is fixedly mounted to the crankshaft for rotation therewith. A starter shaft is supported by the engine housing for rotation. A spring housing includes a circumferential flange that defines an annular track with the at least one cup, and a spring is housed within the spring housing. The spring has a first end interconnected with the spring housing and a second end interconnected with the engine housing. A friction roller is movable into the annular track and into engagement with both of the circumferential flange and the at least one cup to cause rotation of the spring housing and loading of the spring in response to rotation of the crankshaft.

Abstract: An engine starting device for an internal combustion engine, includes an energy storing mechanism including at least one elastic member, an input element engageable with the elastic member and movable into contact with a rotatable engine member of an engine to load the elastic member, an output element that is movable in response to unloading of the elastic member, at least one manual actuator to enable unloading of the elastic member, a locking mechanism engageable with the energy storing mechanism to prevent the elastic member from unloading from a loaded state, a sliding member, a cam member mounted to the sliding member, a pivot link pivotably mounted to the sliding member, and a key device coupled to the pivot link. In operation, rotation of the key device in a locking direction causes the pivot link to move the sliding member, thereby causing the cam member to engage the locking mechanism when the locking mechanism is positioned in engagement with the energy storing mechanism.

Abstract: An engine starting device for an internal combustion engine, includes an energy storing mechanism including at least one elastic member, an input element engageable with the elastic member and movable into contact with a rotatable engine member of an engine to load the elastic member, an output element that is movable in response to unloading of the elastic member, at least one manual actuator to enable unloading of the elastic member, a locking mechanism engageable with the energy storing mechanism to prevent the elastic member from unloading from a loaded state, a sliding member, a cam member mounted to the sliding member, a pivot link pivotably mounted to the sliding member, and a key device coupled to the pivot link. In operation, rotation of the key device in a locking direction causes the pivot link to move the sliding member, thereby causing the cam member to engage the locking mechanism when the locking mechanism is positioned in engagement with the energy storing mechanism.

Abstract: An internal combustion engine includes an engine housing, a crankshaft supported within the engine housing for rotation with respect to the engine housing, and a flywheel fixedly mounted to the crankshaft and rotatable with the crankshaft in a starting direction to start the engine. A coil spring has an outer end fixedly interconnected with respect to the engine housing, and an inner end. A unidirectional clutch has a portion connected to the inner end of the spring. The unidirectional clutch is characterized by an interference condition in which the unidirectional clutch couples the inner end of the spring to the flywheel such that the flywheel and crankshaft may be rotated in the starting direction in response to unloading of the spring. The unidirectional clutch is also characterized by a non-interference condition in which the inner end of the spring is uncoupled from the flywheel.

Abstract: An engine starting and stopping device for an internal combustion engine includes an energy storing mechanism having at least one elastic member such as a spring, an input element engageable with the elastic member and movable during engine coast down to load the elastic member, and an output element that is movable in response to the energy storing mechanism. The output element is movable in response to the energy storing mechanism as the elastic member unloads from the loaded state, to thereby move a rotatable member (i.e., a crankshaft and/or flywheel) of the engine during starting of the engine. An input control device is also provided for positioning the input element into engagement with the rotatable member of the engine such that rotation of the rotatable member moves the input element to load the elastic member during engine coast down and also to brake the engine.

Abstract: A dynamic gas seal for an internal combustion engine reduces exhaust emissions by minimizing the amount of hydrocarbon-laden air from the engine breather that enters the combustion chamber through the open intake valve. The dynamic gas seal includes several channels which allow filtered air at atmospheric pressure to enter the combustion chamber in place of oil-laden air from the breather. The dynamic gas seal includes a channel between the air filter and the intake valve system, and channels between the breather exit and the carburetor intake.

Abstract: The self-aligning valve assembly facilitates proper seating of an engine exhaust valve even though the valve seat is distorted or tilted due to temperature gradients. The valve assembly includes a guide member having a flat surface that slides across a flat surface on the engine block. The guide assembly also includes a return spring and a spring retainer that engages a notch on the valve stem. The spring is disposed between the guide member and the spring retainer. To improve valve closing, the seating surface on the underside of the valve head is preferably convex, while the valve seat is conical. In operation, the compression spring forces proper seating to occur by acting on the retainer which is in turn connected to the valve stem. The guide member slides to reorient the valve stem to the proper position for optimal seating.

Abstract: A connecting rod for connecting a reciprocating piston to a rotating crankshaft of an internal combustion engine includes an improved lubrication distribution system for conveying lubrication into its crankpin bearing. The lubrication is distributed by means of a pair of radial bores one of which extends through the cap of the crankpin bearing and the other of which extends through an arcuate-shaped crankpin bearing portion integrally formed at the end of the connecting rod. The bores are located diametrically opposite one another, and each bore includes an outlet opening into the crankpin bearing hole. The outlets are oval in cross-section and have chamfered sidewalls with an angle of between 30.degree. to 60.degree. with respect to the bore.

Abstract: A connecting rod for a reciprocating piston of an internal combustion engine. The connecting rod includes a two-piece crankpin bearing which is formed by an integral crankpin bearing portion and an arcuate-shaped cap member disposed in mating relationship therewith to attach the connecting rod to a crankpin of a crankshaft. The crankpin bearing includes a wedge-shaped key which cooperates with a tapered key-receiving groove which is dimensioned to permit an initial press fit assembly between the cap member and the crankpin bearing portion. The key and groove facilitate assembly of the cap member to the crankpin bearing portion by providing proper alignment of these components, and further facilitates disassembly of the cap member from the crankpin bearing portion should the connecting rod need repair or replacement.

Abstract: A connecting rod for connecting a reciprocating piston to a rotating crankshaft of an internal combustion engine includes a crankpin bearing designed to seize on a crankpin and stop the engine when the crankpin bearing is operating in a failure mode, as for example due to the loss of oil lubrication. The crankpin bearing design includes a pair of circumferential shoulders formed between the inner circumferential surface of the bearing and the end walls of the bearing which results in the inhibition of heat transfer from the inner circumferential surface toward the outer circumferential surface so that the crankpin bearing expands radially inwardly in a failure mode. Stopping of the crankshaft is also facilitated by varying the torque of each cap screw used to assemble the crankpin bearing.

Abstract: A method of cutting and finishing a cylinder bore surface yields a highly polished finish having substantially no tool marks. The method includes removing a first thickness of surface material using a diamond-tipped rough cutter disposed on a rotating milling tool head. A second thickness of material is then removed by a diamond-tipped finish cutter also disposed on the same rotating head. The finish cutter removes between 0.0015 to 0.002 inches of material, which corresponds to the majority of the material left in the compressive state after the rough cut step.