Abstract: A sub-piston 19 is supported movably in the upward and downward direction on an upper end of a main piston 4 to define an air-fuel mixture cooling chamber 20 between the pistons 4 and 19. The air-fuel mixture cooling chamber 20 communicates with a peripheral edge of a combustion chamber 12. The sub-piston 19 is connected to a cam member 23 which is supported on a crankshaft 7 through a subsidiary connecting rod 21. The volume of the air-fuel mixture cooling chamber 20 is increased and decreased in operative association with the rotation of the crankshaft 7. The air-fuel mixture cooling chamber 20 has an increased volume in a phase from a compression stroke to a point immediately after ignition, and the generation of a knocking is prevented by cooling an air-fuel mixture filled in such air-fuel mixture cooling chamber 20.

Abstract: A cylinder head has a head portion for attachment to an engine cylinder of an internal combustion engine, and a combustion chamber dome is adjustably received in a central aperture of the head portion. External circumscribed threads on the combustion chamber dome engage corresponding threads in the central aperture of the head portion so that the combustion chamber dome may be adjustably moved into a preselected adjusted position within the central aperture by rotation of the combustion chamber dome with respect to the head portion.A method of adjustably establishing a combustion chamber in a cylinder of 1 an internal combustion engine is also disclosed.

Abstract: The present invention is an improved drive train which includes an engine having at least one power cylinder with a power piston mounted for reciprocating motion therein. The power piston is connected to a crank shaft in the usual manner for translation of the reciprocating motion of the power piston into rotation of the crankshaft, which in turn, is transmitted in the conventional manner to the drive wheels of the vehicle. Provision is made for the feed of fuel into a combustion chamber located within the power cylinder at one side of the power piston. Intake and exhaust valves, in fluid communication with the combustion chamber serve, respectively, to allow intake of air during an intake stroke of the power piston and exhaust of combustion products during an exhaust stroke of the power piston. A floating piston at least partially closes the combustion chamber opposite the power piston and is mounted for reciprocating motion relative to the combustion chamber.

Abstract: An internal combustion engine has at least one set of first and second cylinders (12,14), the first cylinder (12) having a larger swept volume than the second cylinder (14), and respective first and second pistons (16,18) movable in the cylinders. The pistons are coupled together such that they are movable in the cylinders in a cyclic manner at the same frequency. An air inlet (24) and an exhaust outlet open into the first cylinder and a fuel injector (34) provides fuel to the second cylinder. A combustion space (20) is also provided which communicates with both cylinders during at least a portion of the expansion stroke. The second piston has a crown (35) and a body portion (19), with the crown being spaced from and connected to the body portion and having an edge (37) which is relatively small in the axial direction compared to the distance between the crown and the body portion in the axial direction.

Abstract: The present invention is an internal combustion engine having a rotary sleeve valve mechanism with a sleeve valve which has an opening formed in the outer peripheral surface for suction of fuel and discharge of exhaust gas. The present invention achieves an improvement in the admission and exhaust efficiency and simplification of the valve mechanism by employing a rotating sleeve valve. The rotary sleeve-valve internal combustion engine has a cylindrical rotary cylinder valve (3) which is rotatably supported in an engine block (1). An opening (5) which is provided in the outer peripheral wall surface of the rotary cylinder valve (3) provides communication with an inlet port (10) during admission and with an exhaust port (15) during exhaust. A seal ring (40) is provided around the periphery of the opening (5) to effect gas seal for the area between the engine block (1) and the inner peripheral wall surface (7).

Abstract: The present invention relates to an arrangement for an internal combustion engine. The engine is of the kind which has a number of working cylinders (1, 2, 3, 4), each of which communicating with a corresponding auxiliary cylinder (5, 6, 7, 8). Each working cylinder has a working piston (9, 10, 11, 12) which is so arranged as to execute a reciprocating motion and, via a connecting rod (9a, 10a, 11a, 12a), the working piston is operatively connected to a first crankshaft (17). Each auxiliary cylinder (5-8) has an auxiliary piston (13, 14, 15, 16) which is so arranged as to execute a reciprocating motion and via a connecting rod (9a-12a), the auxiliary piston is operatively connected to a second crankshaft (18). Acting between the aforementioned crankshafts is a device (19, 20, 21) to ensure that the motion of the auxiliary piston (13-16) occurs in a relation to the motion of the working piston (9-12), and to provide angular displacement between the shafts (20, 21).

Abstract: The cylinder head of each power cylinder of this internal combustion engine includes an auxiliary cylinder in communication with the power cylinder. An auxiliary piston is moveable within the auxiliary cylinder in synchronism with the power piston. During the compression stroke of the engine the auxiliary piston is retracted and the auxiliary cylinder becomes filled with the combustible mixture. This mixture is transferred back to the power cylinder as the power piston moves away from its upper dead center position. Thus the time during which the mixture is at maximum compression is increased and therefore the explosion takes place when the crank shaft has already rotated through an appreciable angle from the upper dead center position. Thus the torque exerted by the power piston is considerably increased with respect to the conventional engine. To further increase this torque the axis of the crank shaft is laterally offset from the center line of the power cylinder in a direction to increase said torque.

Abstract: A reciprocating internal combustion engine has a head block axially slidably mounted in a bore formed in a cylinder block in alignment with the cylinder bore, and a cam for moving the head block in the bore in accordance with the position of the piston. The crankshaft of the engine is laterally offset from the axis of the cylinder bore by the length of the crank radius. The cam is so arranged that the motoring pressure becomes maximum at the crank angle of 90 degrees.

Abstract: Internal combustion engine comprising at least one cylinder (10), one piston (2) mounted to the crankshaft (2'), and at least one inlet valve and one exhaust valve. At the end of the cylinder (1) corresponding to the top dead center of the piston (2) are arranged on one hand a second cylinder (3) and a second piston (6) which are integral parts of the cylinder (1) and on the other hand a third cylinder (4) and a third piston (7) wherein injection means (8) and ignition means (9) are provided, the cylinder (4) communicating by a conduit (5) with the cylinders (1) and (3). The coupler means (11) provide for the drive of a small crankshaft (13). The control (10) enables via the coupler (11) a rotation angle shift up to 180.degree. between the shaft of the crankshaft (2') of the cylinder (1) and the shaft of the small crankshaft (13 ), the latter having two throws (14) and (14') offset by 180.degree. and actuating the pistons (6) and (7).

Abstract: An engine includes an engine block (10) provided with cylinders (12,14) having two pistons (16,18) and a cylinder head (19) having a piston (20) biased by means of torsion bars (24). The biased piston (20) is held in position by an arm (22) which is restrained by torsion bars (24). During the compression stroke of the engine the biased piston (20) is seated with faces (30,32), in contact and on ignition of the compressed mixture the biased piston (20) is lifted off the seat (32) creating a common combustion chamber in which separate charges are mixed. The biased piston (20) limits the combustion space and thereby controls the compression ratio to suit the desired performance.

Abstract: A yoke type engine wherein the orbital path of the slider is alterable to effect piston stroke and compression ratio changes. A crank component has a crankpin which carries and positions the slider. A boss of the crank component is carried by a control shaft in an offset manner. Timing gears normally drive the control shaft in synchronization with the crankshaft to maintain a constant stroke and compression ratio. Relocation of certain timing gears by an actuator causes the control shaft to rotationally advance or retard to reposition the crank component carried thereby to in turn alter the orbital path of the coaxial crankpin and slider relative to a crankshaft axis. Accordingly, high and low compression orbits for the slider may be effected to best suit engine loads. A variable length throw couples the slider to the crankshaft. The orbital path of the slider provides increased crankshaft leverage over conventional engine arrangements.

Abstract: In an internal combustion engine, two opposed pistons of equal radius are slidably mounted in a cylinder and respectively connected to cranks of unequal throws mounted for rotation at oppositely disposed cylinder ends in a common crankcase. The pistons are adjustable in opposing linear travel to define a flexible cylinder-head, the relative piston positions of piston proximity establishing a range of compressions therebetween correspondable to the respective compression-ignitions of a plurality of available fluid fuels. The cranks are gear connected and similarly offset from the cylinder's longitudinal centerline to eliminate dead centers, produce higher combustion pressures at more effective crank angles, and coordinate the pistons' relative linear speeds in exhaust, air intake, fuel injection, compression and power production in two cycle operation of the engine.

Abstract: An engine capable of storing high pressure gases and discharging them to increase the pressure of compressed fuel-mixture. A gas storage chamber is provided adjacent to the combustion chamber. The chamber opens to release high pressure gases just prior to ignition and closes just after ignition to store ignited gases until just prior to the next ignition. The working efficiency of an engine goes up as its compression ratio increases.

Abstract: A device to fit existing engines for the purpose of increasing compressed fuel-mixture pressure and promoting a compression ratio of the fuel-mixture in an engine to enable the fuel-mixture to burn more perfectly and the engine to works more efficiently.In the prior application of the same petitioner, titled "Pressure Addible Engine" with the same purpose to the invention but built in an unit engine which shall request people to throw the used engine away. In incentive of that, present invention modifies the prior invention into independent device unit, suitably fit to existing gasoline engine or diesel engine and makes the invention to be acceptable popularly.

Abstract: An engine producing combustion of a fuel by compression rather than ignition comprises a conventional engine cylinder having a pair of opposed secondary cylinders mounted side-by-side on the upper portion of the cylinder chamber. The secondary cylinders are driven by a cam arrangement in a direction transverse to the action of the main engine cylinder and at predetermined synchronized time intervals. The secondary pistons operate in conjunction with the main piston entering the respective compression chambers on the 0.degree. top dead center system of the main piston to produce combustion by compression thereby eliminating the need for electric ignition and providing more power per cylinder. As further advantage, there is less pollution due to more efficient combustion in an arrangement which also eliminates the necessity for engine tuneups.

Abstract: A two-cycle diesel engine comprising a diesel head and a combustion chamber whose size is variable upon movement of a flexible fluorocarbon membrane. The diesel engine has an engine cylinder in which a reciprocating piston is disposed. The combustion chamber is positioned above the piston and bounded on top by the membrane. Since fuel ignition occurs because of the heat from the compression of air in the combustion chamber, the rate of firing of the engine can be altered by changing the chamber's size. This is accomplished by a flexing and unflexing movement of the membrane which is selectively controlled by a contra piston and screw mounted in the diesel head above the membrane.

Abstract: An internal combustion engine and a method of operating such an engine in which a power piston and a control piston move within a cylinder for defining between the pistons a combustion chamber. Charges of gas are drawn into an intake chamber defined within the cylinder by the control piston and are then transferred through the control piston into the combustion chamber where the charge is compressed and burned to deliver power from the engine through the power piston. In accordance with the present invention, the combustion chamber is maintained at a substantially constant volume during a combustion stroke of the power piston and as power is delivered from the engine.

Abstract: An internal combustion engine is provided with an auxiliary piston reciprocating within an auxiliary chamber for generating turbulence in a gas mixture contained within a main combustion chamber. Forward motion of the auxiliary piston causes the injection of a gas into the main combustion chamber through a communicating passageway when the main piston approaches top dead center of the compression stroke.

Abstract: For improving the efficiency of an Otto cycle engine operating under varying loads, an opposing piston is provided above the driving piston in each cylinder and is controlled in accordance with the inlet manifold depression so as to vary the compression ratio and maintain the compression substantially constant with different working loads.

Abstract: A diesel, gasoline or gas internal combustion engine adapted for operation on a two-cycle or four-cycle basis includes apparatus to vary the compression ratio of gases during operation of the engine. Two pistons, connected to separate crankshafts, communicate with each other in a single internal combustion chamber. One piston is reciprocated by a crankshaft in one cylinder portion to convert thermal energy into mechanical energy. The displacement of the one piston defines a fixed compression ratio and the displacement of a second piston by a second crankshaft in the other cylinder portion operates in the combustion chamber to a second fixed compression ratio. The two crankshafts are coupled together through timing means used to change the relative rotational phase relation between the crankshafts whereby a net compression ratio is formed as components of the compression ratios of both pistons.

Abstract: A piston-type internal combustion engine includes a variable valve timing device controlling the timing of the intake valve, and a coupling between the accelerator pedal and the variable timing device for varying the timing of the intake valve in response to the movement of the accelerator pedal, thereby controlling the quantity of the fuel mixture in the cylinder at the time of combustion. The engine also includes means for maintaining a substantially constant compression ratio in the cylinder notwithstanding variations in the engine output.A number of embodiments are disclosed. In one embodiment, the means for maintaining a substantially constant compression ratio in the cylinder comprises an auxiliary cylinder and an auxiliary piston movable therein, the inner end of the main and auxiliary pistons communicating with each other and defining a common chamber with their respective pistons, the auxiliary piston being displaceable within its cylinder to enlarge or decrease the volume of the common chamber.