Abstract: A V-engine having a plurality of cylinders (2) arranged alternately in two banks comprises a combustion chamber provided for each of the cylinders (2), an intake port (20) which connects the combustion chamber to an intake manifold (50), and an exhaust port (30) which connects the combustion chamber to an exhaust manifold (70). The intake ports (20) of the two banks are all configured so as to pass through one of the banks, and the exhaust ports (30) of the two banks are all configured so as to pass through the other bank. The angle formed by the two banks is set to eight degrees or less.

Abstract: A compression ignition rotating cylinder engine (CIRC), provides a design that has several distinct advantages over conventional internal combustion engines. Rotating cylinder blocks and a fixed header plate provide a more fuel-efficient engine with constant positive torque and reduced vibration.

Abstract: An oil pump for an engine having a first cam shaft and a second cam shaft. The oil pump includes a housing and a first pump assembly at least partially disposed within the housing. The first pump assembly includes a rotating element that is adapted to be directly driven by the first cam shaft. A second pump assembly is at least partially disposed within the housing. The second pump assembly includes a rotating element that is adapted to be directly driven by the second cam shaft.

Abstract: An internal combustion engine and method is disclosed wherein separate compression and power cylinders are used and a regenerator or pair of regenerators is mounted between them to provide heat for hot-air ignition. The single regenerator embodiment operates as a two-stroke cycle engine and the embodiment with an alternating pair of regenerators operates as a four-stroke cycle engine. The engine varies the amount of air entering the power cylinder to control the engine output during naturally aspirated operation using valve timing and/or volume control of dead space and can optionally include supercharging to control the engine at higher output levels.

Abstract: In a variable air induction apparatus, a valve element is switched between one side to open a first air intake passage and close a second air intake passage, and the other side to open the second air intake passage and to close the first air intake passage. The first air intake passage and the second air intake passage have lengths different from each other. The valve element is fixed on a shaft member to rotate integrally with the shaft. A driving device applies a driving force to rotate the shaft member. An urging device urges the shaft member to rotate the valve element to be switched to any one of the one side and the other side.

Abstract: The present invention provides a pulley assembly adapted to transmit torque from a drive pulley to first and second driven accessories. The pulley assembly generally includes a housing and an auxiliary drive component. The auxiliary drive component is rotatably supported by the housing and adapted to be coupled to the first driven accessory. The auxiliary drive component includes first and second annular drive surfaces. The first drive surface is adapted to be drivingly coupled to the drive pulley and the second drive surface is adapted to be drivingly coupled to the second driven accessory.

Abstract: A cooling system for an internal combustion engine mounted in a vehicle includes a first flow circuit with a pump for circulating coolant via ducts in the cylinder block of the engine and a radiator. The first flow circuit is separated from atmospheric pressure. The cooling system also includes a second flow circuit which is provided with a coolant reservoir with a normal pressure which is lower than the pressure in the first flow circuit, and a pump for circulating coolant via a pipeline between units with a cooling requirement and a second radiator. The second flow circuit is connected to the first flow circuit via a one-way valve opening in the direction of the first flow circuit.

Abstract: A cooling system apparatus includes a coolant tank, an overflow tank coupled to the coolant tank, and a pressure regulator. The pressure regulator regulates flow of fluid discharged from the coolant tank into the overflow tank.

Abstract: A method for making a lower intake manifold of an internal combustion engine includes the steps of (1) forming a main part from a plastic material by injection molding, (2) forming a runner insert for each engine cylinder from a plastic material by injection molding, and (3) individually attaching each runner insert to the main part to ensure the distance between two adjacent runner inserts is within a predetermined limit.

Abstract: An air intake control system includes valve elements disposed in intake passages for varying the cross-sectional area of each intake passage, a valve shaft for transmitting a driving force to the valve element, an actuator including a motor for producing the driving force for turning valve shaft, a worm gear mounted on a rotary shaft of the motor, and a housing accommodating the motor and the worm gear, and a driving gear which meshes with the worm gear to transmit the driving force supplied from the actuator to the valve shaft. The driving gear includes a boss portion, a tooth portion which meshes with the worm gear, and an elastic member which is sandwiched between and bonded to the boss portion and the tooth portion. The boss portion rotates together with the valve shaft, whereas the tooth portion and the elastic member can rotate relative to the valve shaft.

Abstract: Flap bearing mountings of the present invention are for mounting flap devices (5), such as switch-over, tumble, or swirl flap devices, on a housing (2) of an air intake port system (1) of a combustion engine. Mounting of flap devices (5) is accomplished by thermoforming projections (19) that are formed on bearing elements (10) of the flap device (5) and that extend through corresponding apertures (20) formed in the housing (2) of the air intake port system (1) of a combustion engine. This structure makes it possible to cost-effectively and precisely mount one-piece flap shafts (6, 7) in all air intake port systems (1), without having to use additional mounting elements. Through the exact, precise fixing of the mounted position, deformation of the shaft (6, 7), having flap bodies (8) arranged thereon, is reliably prevented and the service life of the entire flap device (5) is prolonged.

Abstract: A valve is constructed to strike a balance between providing relatively high sealing yet low friction as components of the valve move. The valve includes a port and an actuator movable relative to the port. A member is disposed between the port and the actuator. The actuator acts on the member so that it can intermittently seal the port as it moves. The member and the actuator have a substantially low friction interface, whereas the seal member and the port have a substantially high sealing interface. The valve can be used in an engine, such as a rotary valve in an internal combustion engine.

Abstract: An intake air device includes a first intake passage the length of which is fixed; a second intake passage the length of which can be changed, and a downstream-end of which is joined to a downstream-portion of the first intake passage; a first valve the opening degree of which can be changed, and which is provided in the first intake passage; a second valve the opening degree of which can be changed, and which is provided in the second intake passage; and operation means for operating the first valve and the second valve according to the operating state of the internal combustion engine. With this configuration, the cross sectional area perpendicular to the longitudinal direction of at least one intake passage that is used can be appropriately changed according to the operating state of the internal combustion engine.

Abstract: A choke valve is controlled finely suited to the running state of an engine. A throttle valve 8 and a choke valve 9 are provided in series on an intake pipe 6, and the opening degree of the choke valve 9 is controlled by a stepping motor. The choke valve opening degree upon start of engine (start opening degree) is determined depending on the engine temperature. The stepping motor 11 is initialized at the fully closed side of the choke valve 9 when the power source for starting the engine is turned on. The start opening degree of the choke valve is judged to be closer to the fully closed side or fully opened side, and the stepping motor 11 is initialized at the fully closed side if judged to be close to the fully closed side, and at the fully opened side if at the fully opened side.

Abstract: An exhaust valve assembly for a two stroke internal combustion engine having a cylinder with at least one main exhaust port and one auxiliary exhaust port is disclosed. The assembly comprises a main exhaust valve for at least partially closing the main exhaust port, an auxiliary exhaust valve for at least partially closing the auxiliary exhaust port, the auxiliary exhaust valve being separate from the main exhaust valve, and an actuator for actuation of the main exhaust valve and the auxiliary exhaust valve, wherein the actuator is connected to the main exhaust valve and the auxiliary exhaust valve is connected to the actuator by the main exhaust valve.

Abstract: A two-stroke internal combustion engine includes dual transfer passages in gaseous communication between a crankcase chamber and a combustion chamber of the engine, an air passage through the crankcase to the crankcase chamber and in gaseous communication with a carburetor of the engine. A rotatable circular disk or crank-web is rotatably connected to a crankshaft. A piston may be used to open and close a top end of the passages. An air inlet port to the transfer passage for stratified scavenging is opened and closed by the crank-web that has passages and cutouts. The rotary valve replaces the one-way reed valve used in stratified scavenged and charged two-stroke engines. The air passes from lower ends of the transfer passages to top ends and into the crankcase through a piston passage, through the adjacent transfer passages directly, or through a passage in the piston into the crankcase.

Abstract: A piston-cam engine includes a drive cylinder, a drive piston operably disposed therein having a piston head and a shaft, a support frame having a drive shaft rotatably movably connected thereto, a cam connected to the drive shaft having a peripheral surface and having a plurality of lobes thereon, a roller member connected to the piston shaft and adapted for engagement with the peripheral surface of the cam, and a biasing element for biasing the roller member continuously against the peripheral surface of the cam.

Abstract: A two-stroke engine is for a portable handheld work apparatus such as a motor-driven chain saw, cutoff machine, brushcutter or the like. A combustion chamber (3) is configured in the cylinder (2) of the engine (1) and is delimited by a reciprocating piston (5). The piston (5) drives a crankshaft (7) via a connecting rod (6). The crankshaft (7) is rotatably journalled in the crankcase (4). The two-stroke engine includes a discharge opening (10) for conducting exhaust gases out of the combustion chamber (3) and an inlet (11) via which an air/fuel mixture is conducted to the crankcase (4). The air/fuel mixture passes via at least one transfer channel (12, 15) from the crankcase (4) into the combustion chamber (3). The transfer channels (12, 15) open at one end with a transfer window (13, 16) into the combustion chamber (3) and are connected at the other end to the crankcase (4). A bypass channel (20) conducts essentially fuel-free gas and opens via a membrane valve (19) into the transfer channel (15).

Abstract: A method for engine speed control for an internal combustion engine generating unit (1) is disclosed, whereby a first time point is set when the actual speed (nM(IST)) exceeds a threshold value and a second time point set when the actual speed (nM(IST)) exceeds a start speed. A time span is then calculated from both time points. Depending on said time span, a run-up ramp and the regulation parameters for a speed regulator are selected.

Abstract: An air induction system for a motor vehicle, having a pair of conduits fluidly connecting an engine to the ambient air and a housing located between the pair of conduits. The housing includes side walls and a top wall defining a chamber. A baffle plate for attenuating noise is positioned within the chamber adjacent to the top wall. Additionally, the baffle plate defines a plurality of openings extending therethrough.