Abstract: A pump comprising a pumping chamber (3) for pumping a liquid; at least part of the pumping chamber (3) being formed by a pumping means (6) having a pumping area (A2); an actuation chamber (2) in communication with a source of pressurised fluid, at least part of the, actuation chamber (2) being formed by an actuation means (5) having an actuation area (A1); a connection means (7) connecting the actuation means and the pumping means, so that, at least during those times that liquid is required to be pumped by the pump, variations of the pressure in the actuation chamber effect movement of the actuation means which in-turn effects movement of the pumping means to enable supply of liquid to the pumping chamber and delivery of liquid therefrom; wherein the pressure within the pumping chamber is greater than the pressure within the actuation chamber.

Abstract: In an internal combustion engine with a positive displacement charger having a charger housing adjacent to the engine cylinder(s), the gas exchange control element for the combustion chamber inlet is a functional part of the charger, preferably designed as a rotary piston charger. An internal combustion engine comprising at least one set of three cylinders having a combustion space is provided with an outlet gap at its lower end. The outlet gap is controlled by a stroke piston. There is at least one rotary piston charger in constant driving connection with a crank shaft. The charger has an outlet opening forming an inlet opening of one combustion space. The opening is capable of being closed off by a gas exchange control element that is separate from the stroke piston.

Abstract: A V-type two cycle, supercharged engine having scavenging ports for said cylinders includes a mechanical supercharger and a surge tank. A pair of rotors of the supercharger are horizontally arranged in parallel with each other with one positioned directly below the other and them supercharger is offset laterally toward one of the left and right banks from the center of the V-shaped space defined between the left and right banks. An air expulsion opening is formed in the supercharger housing on its side nearest to the other bank. The surge tank is disposed below the supercharger and is partly expanded upward on the side nearest the other bank.

Abstract: The present invention describes a system for supplying the primary combustion air to a reciprocating piston internal combustion engine including a trochoidal chamber air pump having a pair of pumping chambers interposed between an air intake and each of the cylinders of the engine. Each pumping chamber has an air inlet connected to an air intake, and an air outlet that is connected to the cylinders. In a two-cycle mode of operation, each pumping chamber outlet is connected to one engine cylinder. In a four-cycle mode of operation, each pumping chamber outlet is connected to a pair of cylinders to supply air during the intake stroke. The input shaft of the trochoidal chamber air pump is driven by, and may be connected directly to, the crankshaft of the engine so as to rotate on a 1:1 ratio.

Abstract: An air compressor, which is embodied as a single or multi-cylinder/piston compressor, and which is driven by gear wheels. The drive gear or pinion of the air compressor is disposed on the air compressor crankshaft and meshes with a gear wheel on the camshaft of an internal combustion engine. Provided on the periphery of the air compressor pinion is, for a single cylinder/piston compressor, one interval having an enlarged tooth gauge, and for a multi-cylinder/piston compressor, several such intervals, the number of which corresponds to the number of times the tangential force passes through zero during one air compressor crankshaft revolution, with the centers of the intervals being coordinated with the respective top dead center position of the air compressor piston.

Abstract: An internal combustion engine includes a pair of opposed piston assemblies that reciprocate within a single combustion chamber in an engine block. Each piston assembly includes an annular piston head that is received concentrically around a driveshaft which is rotatably driven by the piston assemblies. A supercharging chamber is concentrically disposed about each piston assembly. Pump rings connected to each piston assembly extend into the supercharging chambers and pump air through the chambers into an intake manifold as the piston assemblies reciprocate in each direction. Cooling lubricant is circulated through the engine block and piston assemblies as well as through and along the drive shaft so as to cool the combustion chamber on substantially all sides.

Abstract: A compound rotary-reciprocal engine with multiple cylinders of a reciprocator component coupled to a positive displacement, rotary compressor-expander, with systems for coordinating the cycle timing of each cylinder with the timing of the rotary compressor-expander and with systems enabling the efficient operation of the coupled components as a unitary engine in a wide range of operating conditions.

Abstract: In the case of a multicylinder IC engine of the piston type with a stroke charging means (12), and in which branch ducts (16, 18, 20 and 22) extend from at least one air inlet duct (149) to the individual engine cylinders (24, 26, 28 and 30) and at the associated cylinder such ducts are able to be shut by at least one inlet valve (32, 34, 36 and 38), in order to reduce the amount of dead space each branch duct (16, 18, 20 and 22) is provided with a further valve (58, 60, 62 and 64).

Abstract: A combustion engine comprises a plurality of cylinders. Each cylinder contains aligned pistons displaceable toward and away from one another. Rotary cam disks are connected to a drive shaft and are arranged to be contacted by respective ones of the pistons for transferring motion therebetween. Each cam disc includes a cam curve arranged to be engaged by respective pistons of each pair of pistons. Each cam curve has circumferentially spaced peaks and valleys interconnected by an interconnecting surface with which the cams make contact during a power stroke. The interconnecting surface is of concave configuration and presents a slope which progressively decreases from adjacent the peak to adjacent the valley.

Abstract: A compound rotary-reciprocal engine with multiple cylinders of a reciprocator component coupled to a positive displacement, rotary compressor-expander, with systems for coordinating the cycle timing of each cylinder with the timing of the rotary compressor-expander and with systems enabling the efficient operation of the coupled components as a unitary engine in a wide range of operating conditions.

Abstract: A reservoir is provided with a mounting flange arrangement for reservoir attachment to an engine block to receive engine oil accumulating in an engine air box. A pump on the reservoir is intermittently activated by the vehicle electrical system to pump reservoir contents back to the engine oil sump. A reservoir outlet conduit terminates coupled to an engine dipstick opening to utilize existing block openings.

Abstract: A gear drive for driving accessories such as an oil pump for a two-cycle engine (10) includes a worm member (25) mounted on the crankshaft (14) of the engine. The worm member (25), formed of a low friction plastic material such as nylon impregnated with molybdenum disulfide, engages a worm gear (24) mounted on the engine (10) to drive the oil pump (21).

Abstract: Arrangements for engine compressor units are disclosed in which power cylinders operating on the two-stroke cycle are provided with charging air from a blower or other source which also provides charging air to two-cycle compressor cylinders so as to increase compressor volumetric efficiency through the delivery of precompressed inlet charges.

Abstract: There is described a charging and distributing device for a piston engine, the device including a variable displacement rotary compressor delivering through one of its shafts to a coaxial rotating distribution tube (1,25), the tube being formed with ports (4,29) which sequentially coincide with inlets (7,27) to the respective cylinders of the engine. A control system (14) to regulate the displacement of the compressor is disclosed, and the use of eccentrically weighted rotary pistons (10,12) and/or distribution tube to balance the engine as a whole is envisaged.

Abstract: The internal combustion engine performs the thermodynamic cycle partially inside the cylinder, with the piston connected to the crankshaft, and partially in a turbo-supercharger in which there takes place the final stage of the expansion of the burnt gases and, simultaneously, the suction and the first phase of compression of the air. The said compression is completed afterwards in the cylinder, continuously and without any partialization.

Abstract: An I.C. engine has a block, the engine forming a bore and having a crankshaft. The engine includes:(a) first and second pistons that reciprocate in that bore,(b) connection structure interconnecting the pistons, the pistons operatively connected to the crankshaft,(c) valve casing structure operatively coupled to the block, there being a first zone in the bore between the casing structure and one piston, and a second zone between the casing structure and the other piston,(d) the valves associating with the casing structure adapted to pass intake air into one of such zones and to exhaust compressed air out of the other of the zones in response to piston movement in one direction, and adapted to pass intake air into the other of the zones and to exhaust compressed air from that one zone in response to piston movement in the opposite direction.