Abstract: A single revolution cam engine is provided, having four equidistant cams on a drive camshaft. Each cam has four equally spaced raised cam lobes. A roller bearing on a bearing pin contacts each cam and is connected to pin arms which contact compression springs, an allen cap screw is in contact with each compression spring, and a piston in a cylinder is in contact with each bearing pin. The single revolution cam engine has particular utility in connection with providing maximum engine power and performance, with power up to four times stronger than that of a conventional four-cycle engine.

Abstract: A piston slidably fitted in a cylinder is connected to an auxiliary piston slidably fitted in an auxiliary cylinder coaxial with the cylinder through a first connecting rod. The left and right crankshaft halves are disposed outside of a piston sliding range of the cylinder with respect to the radial direction thereof. The increase of the volume of a combustion chamber corresponding to the increase of the crank angle with reference to top dead center of the piston is suppressed, and it is therefore possible to enhance the equal volume degree at the time of combustion of a mixture gas and to enhance thermal efficiency. This arrangement also enhances thermal efficiency, and simplifies the structures of intake systems and valve mechanisms when employed in horizontally opposed type internal combustion engine.

Abstract: A radial piston engine is disclosed wherein power is transferred such that the power take-off is truly balanced, where the piston runs truly parallel to the cylinder walls. This concept reduces wear of the cylinders and piston rings. The engine provides improved gas mileage due to the reduced piston drag. One unique feature is the power take-off from the piston to the flywheels. The design takes power from inside the cylinder compartment, through four transfer arms, to cams that in turn transfer the power to two flywheels. By firing complimentary cylinders 180 degrees at the same time, almost no vibration is noticed. Also, since the cylinders can fire many times per flywheel rotation, the torque which this engine produces is greater other designs. Any number of cylinders is possible. Single cylinders and two cylinder designs with chain power take-offs are also possible for lawnmowers and motorcycles.

Abstract: A structure for transmitting the power of a motorcycle engine includes an intermediate shaft arranged between a crankshaft and an input shaft of a transmission, and a method for making the structure. The structure and the method have the objective of shortening the distances between these three shafts, improving workability of assembling, and providing freedom of setting a speed reduction ratio. An intermediate shaft driven gear and an intermediate shaft driving gear having a diameter smaller than the intermediate shaft driven gear and are mounted in two steps, with the former overlaid on the latter, on an end of the intermediate shaft projecting outside a right case. Similarly, the intermediate shaft driven gear is engaged with a primary gear of the crankshaft, and the intermediate shaft driving gear is engaged with a primary driven gear of the input shaft at a location outside the right case.

Abstract: The invention relates to an internal combustion engine (1) with at least one cylinder (2) with a reciprocating piston (4) coupled to a connecting rod (5) for rotating a crankshaft (6), with an engageable gear (8) that is comprised of a first gear shaft (12) that is driven by the crankshaft (6) through a belt-type stepless transmission (7) and of a second gear shaft (15) that is coupled to an intermediate shaft (18) for rotating a drive shaft (9), and with a balancer shaft (20) driven by the crankshaft (6), said crankshaft (6), first gear shaft (12), second gear shaft (15), intermediate shaft (18) and balancer shaft (20) being disposed in one common, multi-piece housing (24).

Abstract: A radial cam driven internal combustion engine has connecting rod guide pins that slide into ends of the connecting rods, allowing the connecting rods to slide freely linearly while applying side loads on the connecting rods to the crankcase. The stationary guide pins protrude out from a center ring that floats over the central drive shaft. These pins are grooved to allow the pressure inside the connecting rod to escape. Each piston dwells at top dead center long enough to create a fixed volume environment and for all the fuel in the cylinder to be consumed.

Abstract: This invention enable a user to use two identical engines independently or to combine them with this specially designed gear box assembly into various configurations to satisfy users requirements for size, power, shape and firing sequence. This invention will provide the user with a smoother running engine and eliminates the power robbing torque by the unique application of the gear box assembly.

Abstract: A rotary engine, pump or compressor with a intake/exhaust ports in end plates and a rotatably mounted block mounted in a framework. In an embodiment cylinder sets are mounted in the block and each includes opposing cylinders with ends which include transfer ports disposed to alternately form passageways with the intake and exhaust ports as the cylinders rotate with the block. A novel crankset operatively connects the block to the driveshaft.

Abstract: A device for increasing the mechanical efficiency of a piston-driven apparatus of the type having a housing containing at least one piston, at least one piston connecting rod, and a crankshaft having at least one crank and at least one crankpin, comprising a lever having one end pivotally connected to the housing to form a fulcrum point, the lever formed to pivotally connect to the piston connecting rod at a point, and a bearing block movably positioned on the lever, the bearing block being movable between first and second positions of the lever and operatively receiving a crankpin.

Abstract: A mechanical transmission device for an engine with variable volume displacement comprising a piston (2) interlocked in its lower part with a control rack (3), co-operating with a ball-bearing guiding device (4) and with a gear assembly (5) integral with a connecting rod (6) for transmitting movement between the piston and the connecting rod.

Abstract: This is a high torque power reciprocating engine. Comprehensive mathematics shows its fuel efficiency and why it is inherently impossible to make crank engines efficient.

Abstract: A high efficiency compression ignition after-treatment system of a combustion engine includes a first combustion chamber adapted to reciprocatably receive a first piston assembly and a second combustion chamber adapted to reciprocatably receive a second piston assembly. A combustion exhaust passage is coupled between the first and the second combustion chambers. A fuel passage may be connected to the first combustion chamber, and a fuel passage connected to the second combustion chamber. A processed exhaust passage is coupled to the second combustion chamber for receiving the processed exhaust therethrough. A fuel injector is coupled to the second combustion chamber. A three-way catalyst has an inlet coupled to the processed exhaust passage and an outlet coupled to an exhaust passage. An exhaust gas oxygen sensor is connected to the processed exhaust passage. A fuel controller is coupled to the fuel injector and the exhaust gas oxygen sensor.

Abstract: A crankshaft holding structure 10 for use in an internal combustion engine has a front crankshaft 35 supported by a radial roller bearing 25 that is fixed to a crankcase 11 and has an inner side surface 26a. A land 40 of the front crankshaft 35 is held in abutment against the inner side surface 26a to limit crankshafts 30, 35 against axial elongation and deformation. The radial roller bearing 25 has an outside diameter D1 that is the same as an outside diameter of a radial ball bearing 20. The forgoing arrangement includes simplified bushings cast in a crankcase and having bearing press-fitted therein, that allows the bushings to be used as common parts.

Abstract: A piston slidably fitted in a cylinder is connected to an auxiliary piston slidably fitted in an auxiliary cylinder coaxial with the cylinder through a first connecting rod. An intermediate pin provided on the auxiliary piston is connected to left and right crankshaft halves through a pair of second connecting rods. The left and right crankshaft halves are disposed outside of a piston sliding range of the cylinder with respect to the radial direction thereof. The increase of the volume of a combustion chamber corresponding to the increase of the crank angle with reference to top dead center of the piston is suppressed, and it is therefore possible to enhance the equal volume degree at the time of combustion of a mixture gas and to enhance thermal efficiency.

Abstract: A modular engine design system utilizes selectively replaceable components whereby a family of related engines having varying power outputs may be produced. A first series of engines utilizes a common piston operable in a cylinder of first predetermined dimensions. The engine design may utilize a first or second crankshaft/connecting rod combination to vary the power output. A modified engine design utilizes a second cylinder in addition to the first cylinder. A second series of engines utilizes a larger piston operable in a cylinder of second predetermined dimensions. The second series of engines shares a common engine design scheme with the first series of engines. However, corresponding parts are adapted for use with the larger piston/cylinder combination. The second series of engines may likewise utilize a first or second crankshaft/connecting rod combination to vary the power output. Within each series of engines, modular design concepts are utilized to provide a range of power outputs.

Abstract: A reciprocating mechanism for use in an engine comprises a reciprocating member which is movable in a substantially linear reciprocating direction between two ends of travel, a piston provided on the reciprocating member, and a constant breadth cam and follower, the follower being coupled directly to the reciprocating member to translate linear movement of the reciprocating member into rotary motion of the cam, and the mechanism being such that movement of the reciprocating member at the two ends of its travel is reversed in dependence upon the rotation of the cam, the follower lying to the side of the piston bore and the piston being rigidly mounted to the reciprocating member.

Abstract: An internal combustion engine having a cam for the rockerarm machined vertical on the crankshaft. The rockerarm extends from the crankshaft cam to either an intake valve or an exhaust valve the rockerarm pivots arount the pivot pin. One end of the rockerarm rides against the cam on the crankshaft creating a back and forth movement which in turn creates movement to open or close valves.

Abstract: The internal combustion engine comprises at least one combustion chamber for burning a fuel in timed explosions accompanied by formation of a combustion gas, at least one expansion chamber which is connected with the combustion chamber and separate from the combustion chamber and which has a piston for converting energy of the combustion gas into mechanical energy or work, and a cam gear unit by which a drive shaft can be driven by the piston and which has a cam disk and associated thrust member, wherein the thrust member can be lifted from the cam disk for carrying out irregular engine cycles independent from a continuous rotation of the cam disk, including a pausing of the piston of the expansion chamber at its top dead center.

Abstract: The present invention relates to a manufacturing method of laborsaving engine and engine manufactured by it, it comprises a engine mount, cylinder, throttle, spark plug, piston, piston connecting rod, crankshaft and laborsaving device, the laborsaving device further comprises a first laborsaving connecting rod and second labor connecting rod. Wherein one end of the first laborsaving connecting rod is connected on the engine mount, and another end is connected to the piston connecting rod of the cylinder, the second laborsaving is connected to the first laborsaving connecting rod at a proper position, and another end opposite to the connection end of the second laborsaving connecting rod and the first laborsaving connecting rod is connected to the crankshaft, enabling power transmission from the piston connecting rod to the crankshaft to generate a lever action through the disposition of the first and second connecting rods, and further to attain the laborsaving effect of power output of the engine.

Abstract: An internal combustion reciprocating engine including a drive shaft, at least one piston, and a piston coupling corresponding to each piston wherein each coupling includes: a crank rotatably coupled to the piston, a first and second toothed crank cam gear fixedly coupled to the crank, a first and second complementary toothed drive cam gear fixedly coupled to the drive shaft and drivingly engaged with the corresponding first and second crank cam gears for at least a first and second portion, respectively, of a complete revolution of the drive shaft so linear movement of the piston is converted to rotation of the drive shaft.

Abstract: A power unit has a power case which includes a crankcase portion integrally formed with a transmission case portion. The crankcase portion forms a crankcase in which the crankshaft of a 4-cycle internal combustion engine is received. The transmission case portion forms a transmission case in which a wet type multiple disc friction clutch for transmitting the torque of the crankshaft is received. A partition wall makes the crankcase independent of the transmission case, and thus separates the lubrication system of the internal combustion engine from the lubrication system of the friction clutch. The lubrication structure of the present invention can improve the durability of the friction clutch and make the friction clutch compact, and secure good connection performance of the friction clutch by separating the lubrication system of an internal combustion engine from the lubrication system of friction clutch.

Abstract: A oil supply system supplies the same oil for lubricating an engine and for driving a hydrostatic infinitely variable transmission. The hydrostatic infinitely variable transmission is built into a crankcase of the engine, resulting in an overall compact configuration. A drive shaft of the hydrostatic infinitely variable transmission is provided parallel with a crankshaft of the engine. Axial centers of the drive shaft and crankshaft can be made hollow and serve as oilways. Further, an axial center of a counter shaft of the hydrostatic infinitely variable transmission can be made hollow and serve as an oilway. By the present oil supply system, engine oil is used in common as drive oil for the hydro-static infinitely variable transmission, and as oil supplied to parts of a cylinder head, a stepped transmission, and other various parts of the engine and transmission, thereby elimating the duplication of oil pumps and filters and reducing the maintanance associated with servicing independent oil systems.

Abstract: A reciprocating mechanism for use in an engine comprises a reciprocating member which is movable in a substantially linear reciprocating direction between two ends of travel, a piston provided on the reciprocating member, and a constant breadth cam and follower, the follower being coupled directly to the reciprocating member to translate linear movement of the reciprocating member into rotary motion of the cam, and the mechanism being such that movement of the reciprocating member at the two ends of its travel is reversed in dependence upon the rotation of the cam, the follower lying below and to the side of the piston bore and the piston being rigidly mounted to the reciprocating member.

Abstract: A four-cycle internal combustion engine having a piston reciprocably movable within a cylinder, a crankshaft, a rod connecting the piston to the crankshaft and means arranged between the rod and the crankshaft to vary the stroke of the piston, said means for varying the stroke comprising an internal gear, an external gear and an eccentric member, characterized in that the eccentric distance of the crankpin, the radius of the pitch circle of the external gear and the radius of the pitch circle of the internal gear are in the ratio of one to two to three.

Abstract: A compact internal combustion engine includes an engine housing, an arrangement of cylinders, a reciprocating piston in each cylinder, a crankshaft extending through the engine housing, a cam crank fitted to the crankshaft and rotatable therewith, and a valve assembly. A connecting rod of each piston is coupled to the cam crank via a bearing assembly in a manner which causes the coupled end of each piston connecting rod to follow a continuous path of predetermined configuration throughout each piston stroke to thereby transmit the linear power of combustion into a rotating force. The bearing assembly is structured and disposed to maintain the connecting rods in coupled connection with the cam crank when subjected to both downward forces and outward separating forces which occur throughout rotation of the cam crank as the coupled connection follows the continuous path.

Abstract: A crankshaft holding structure 10 for use in an internal combustion engine has a front crankshaft 35 supported by a radial roller bearing 25 that is fixed to a crankcase 11 and has an inner side surface 26a. A land 40 of the front crankshaft 35 is held in abutment against the inner side surface 26a to limit crankshafts 30, 35 against axial elongation and deformation. The radial roller bearing 25 has an outside diameter D1 that is the same as an outside diameter of a radial ball bearing 20. The foregoing arrangement includes simplified bushings cast in a crankcase and having bearings press-fitted therein, that allows the bushings to be used as common parts.

Abstract: A four stroke internal combustion engine having a flexible arrangement is disclosed such that the engine can be easily configured for supercharged or normally aspirated operation. The engine includes a cooling system that includes both closed loop and open loop cooling systems for improved cooling efficiency. A power take off housing located on one end of the crankcase. Various engine components are operatively coupled to the crankshaft within the power take off housing including a cam shaft for a valve actuation assembly, a generator, an engine starting mechanism, a balance shaft, and a supercharger. The engine contemplated in accordance with the present invention also includes a dry sump lubrication system having lubricant separator for separating lubricant from blow-by gas within the engine.

Abstract: A drive mechanism can be utilized either as a pump or an engine. The device has a piston and cylinder. The piston has a rod that connects with a power gear via a link pin that joins the power gear at a point offset from the power gear shaft. The power gear orbits about a rim gear. A crankshaft gear mounted to a primary shaft is rotated by the orbital movement of the power gear. The rim gear and power gear can be placed in position to constrain the rod to move along the axis of the cylinder. Also, the rim gear can be rotated to a different position so as to cause the end of the rod to orbit with the power gear. This position can be selected to change the stroke length and thus the torque.

Abstract: An internal combustion engine comprising an engine block having two opposed guide slots on an interior surface. The guide slots may be parallel to the direction of movement of the engine pistons. At least one pair of cylinders may be formed in the engine block. The pistons may each be moving in a linear direction perpendicular to the inside of a respective one of the cylinders in response to energy forces in a respective chamber positioned at one end of each cylinder.

Abstract: In a V-type engine including first and second pistons connected to a common crank pin of a crankshaft through first and second connecting rods, a large end of each of the connecting rods is formed so that its lower surface assumes a substantially horizontal attitude at a most-lowered position of the crank pin. This ensures that even if the construction is such that the large ends of the conducting rods do not contact with a defined amount of oil stored in lower portion of a crankcase in the V-type engine, the lower portion of the crankcase can be formed at a small depth, thereby lowering the entire height of the V-type engine.