Abstract: A cover plate is provided for closing a crankcase of an internal-combustion engine on its underside. The cover plate has a suction point for collecting lubricant from the crankcase. With respect to the crankcase, the suction point is closed off by a screen plate. This screen plate comprises a first area with passage openings for the lubricant and a second area which is impervious to the lubricant. The screen plate has the effect that a reliable lubricant intake from the suction point is ensured even in the event of a tilt of the internal-combustion engine.

Abstract: An intake electromagnetic driving valve and an exhaust electromagnetic driving valve are provided which use electromagnetic force to drive an intake valve and an exhaust valve, respectively. In step 102, the ratio between the number of combustion execution cycles and the number of combustion halts is set to obtain a desired target output value. Output control patterns that each consist of combustion execution timing equivalent to the required number of combustion execution cycles, and combustion halt timing equivalent to the required number of combustion halts are set in step 106, 114. In steps 108 to 112, or 118 to 122, in accordance with the output control patterns, whether combustion is to be executed is set with respect to the explosion timing that arrives in each cylinder in order.

Abstract: A cooled valve seat ring for a cylinder head of an internal combustion engine, having a valve seat part, wherein the cooled valve seat ring comprises a sheet-metal cooling channel consisting of a thin sheet of steel and which is connected with a coolant circuit via bores which serve as inflow and outflow for a coolant, wherein the cooled valve seat ring is connected with the cylinder head material by casting technology. In one embodiment, there can be a cooled valve seat ring that is connected with a cylinder head material via a laminate casting process. There can also be a cooled valve seat ring that has an alfin layer for a connection with the cylinder head material. In addition, the cooling channel can be welded onto or soldered onto the valve seat part. Furthermore, the sheet-metal cooling channel can be connected with the valve seat part so as to form a gas-tight seal.

Abstract: Disclosed in the field of the four-cycle reciprocating piston internal combustion engine is an invention for a rotary ported intake and exhaust system and super-atmospherically charged on demand engine. This invention replaces the inefficient reciprocating valve system with a friction free rotating shaft with ports and passageways to produce the four cycles of the engine. It also replaces the accessory externally mounted compressors now used to super charge the engine by the use of two cylinders sharing the same minimum volume totally closed crankcase. As both pistons travel upward, they draw in air or air/fuel or that amount desired through a throttle body into the crankcase. As they travel downward, that cylinder on its intake cycle draws in air/fuel while the volume in the crankcase is compressed. Prior to the completion of the intake cycle, the crankcase pressure is released into that cylinder on its intake cycle super-atmospherically charging it. These cycles are then repeated for the other cylinder.

Abstract: A progressive internal combustion engine that improves fuel efficiency, power output, and decreases emissions having a standard four stroke operation; the intake stroke, compression stroke, power stroke, and exhaust stroke when cylinders are engaged. The progressive internal combustion engine provides for disengaging cylinders. When disengaged, a bypass valve opens, allowing the disengaged cylinder to operate free of compression. The progressive internal combustion engine may be utilized for gasoline, diesel and natural gas type engines.

Abstract: A combustion-type power tool includes a cylinder having a peripheral wall which has an inner peripheral surface and an outer peripheral surface. The peripheral wall is formed with an exhaust hole at a first axial position. A piston is reciprocally movable in an axial direction and is slidable in contact with the inner peripheral surface. A combustion-chamber frame is abuttable on a head portion to provide a combustion chamber in cooperation with the head portion and the piston. The piston allows the combustion chamber to be in fluid communication with an atmosphere through an upper space above the piston and through the exhaust hole when the piston is located at a bottom dead center. The fin is disposed at the outer peripheral surface and has a portion extending in a direction slanted in relation to the axial direction and oriented toward the exhaust hole.

Abstract: A combustion-chamber frame is disposed in a housing of a combustion-type power tool and is movable in a longitudinal direction in interlocking relation to a push lever. The combustion-chamber frame is abuttable on a head portion to provide a combustion chamber in cooperation with the head portion and a piston. A fan is disposed in the combustion chamber and is connected to an output shaft of a motor so as to be rotatable with the output shaft for promoting turbulent combustion of air-fuel mixture. The fan and the combustion-chamber frame define, within the combustion chamber, a high turbulent-combustion region in which the turbulent combustion is rapidly generated and a low turbulent-combustion region outside the high turbulent-combustion region. A fin is disposed at at least one of the combustion-chamber frame, the head portion, and the piston to protrude into the combustion chamber. The fin is located within the low turbulent-combustion region.

Abstract: A four-stroke-cycle engine of a vehicle such as snowmobile comprises a crank case, which is dividable into a plurality of crank case components having mating surfaces, through which the crank case is assembled, a crank shaft rotatably supported in the crank case at a portion between the mating surfaces of the crank case components, and a belt driven-type continuously variable transmission mechanism operatively connected to one end of the crank shaft through a clutch belt. The continuously variable transmission mechanism includes a drive shaft, and the clutch belt is stretched around the drive shaft and the crank shaft so that a tensioning direction of the clutch belt is shifted from a line passing the mating surfaces of the crank case components at a predetermined angle therebetween.

Abstract: A compressed air supply system including a compressor (12), a compressed air line (4) that connects an outlet (3) from the said compressor to an inlet (5) to a first active component (6), and an adjustable fan (13) which is controlled by a control unit and is arranged to generate an air flow intended to cool the said compressed air line (4), and a vehicle comprising such a system.

Abstract: An internal combustion engine includes a cylinder block journaling a crankshaft driven to rotate by a reciprocal piston, and a cylinder head having intake and exhaust passages for delivering a combustible fuel-air mixture to drive the piston and for exhausting the combustion products thereof, respectively. The cylinder block and the cylinder head are a single unitary monoblock member without opposing machined surfaces and a head gasket therebetween.

Abstract: A method of controlling the delivery of fluid to an engine includes receiving a fuel flow rate signal. An electric pump is arranged to deliver fluid to the engine. The speed of the electric pump is controlled based on the fuel flow rate signal.

Abstract: An apparatus and method for varying a compression ratio of an engine having a block and a head mounted thereto. The apparatus and method includes a cylinder having a block portion and a head portion, a piston linearly movable in the block portion of the cylinder, a cylinder plug linearly movable in the head portion of the cylinder, and a valve located in the cylinder plug and operable to provide controlled fluid communication with the block portion of the cylinder.

Abstract: In a drive arrangement for a motor vehicle, comprising an internal combustion engine and a power electronic unit for controlling an electric machine, the power electronic unit is arranged on a carrier and the carrier comprises a cooler which includes coolant passages and is mounted on the engine such that the coolant passages are in direct communication with coolant passages of a cooling circuit of the internal combustion engine.

Abstract: To facilitate attachment/detachment work of an oil filter in a vehicle engine without increasing an outer dimension thereof, and to provide a uniform a supply of engine oil into an engine body. An oil filter is attached onto a front portion of the engine body so as to be detachable in a vehicle body width direction from a side face of the engine body. An exhaust pipe on a side on which an oil filter is attached is displaced to a center side in the vehicle body width direction so as not to overlap the oil filter when viewed from a front of the engine body.

Abstract: A cooling system for an engine wherein a cylinder block side is mounted with a stagnation chamber for detaining, around a temperature-sensing unit of a sub-thermostat, a portion of cooling water discharged to a high temperature passage via an outlet of a cooling water passage of the cylinder block side such that the opening and closing of the sub-thermostat is modulated by the temperature of the cooling water at the cylinder block side. The cooling system includes a main thermostat and a sub-thermostat for individually controlling the flow of cooling water in a cylinder block and a cylinder head. The stagnation chamber, where cooling water discharged from the cylinder block is stagnated, is installed inside a sub-thermostat housing, i.e. where a sub-thermostat is mounted. The stagnation chamber is positioned therein with a temperature-sensing unit. The stagnation chamber communicates with a cooling water discharge passage of the cylinder head via a confluence passage.

Abstract: A cooling system is provided for a vehicle with an internal combustion engine. The cooling system includes a high temperature cooling circuit and a low temperature cooling circuit that is separated from the high temperature cooling circuit. The high temperature cooling circuit cools the engine and includes at least one cooler. The low temperature cooling circuit cools an oil cooler and, if necessary, a charge air cooler and includes a cooler. The oil cooler may be connected with the high temperature cooling circuit so the oil temperature may be controlled within a narrow temperature range.

Abstract: An engine balancer system is provided in which a balancer housing (17) disposed so as to face an oil pan beneath a crankshaft is formed by joining an upper housing (29) and a lower housing (30) via mating faces (P), and the height of the mating faces (P) is lower on a vehicle front side than on a vehicle rear side. Oil discharge holes (45a, 46) for discharging oil that is within the balancer housing (17) are formed in the mating faces (P) on the higher side of the balancer housing (17) and in the upper housing (29) above the mating faces (P) on the lower side of the balancer housing (17). This enables the position of the oil discharge hole (45a) on the lower side to be as high as possible, thereby suppressing penetration of oil into the interior of the balancer housing (17) through the oil discharge hole (45a).

Abstract: A two-stroke internal combustion engine comprises a first cylinder and a second cylinder arranged on a common axis. A first piston pair comprises a first piston and a second piston located in the first cylinder and defining a first combustion chamber. The first piston and the second piston of the first piston pair move in opposite directions within the first cylinder. A second piston pair comprises a first piston and a second piston located in the second cylinder and defining a second combustion chamber. The first piston and the second piston of the second piston pair move in opposite directions within the second cylinder. The first piston of the first piston pair is connected to the second piston of the second piston pair by a first connecting rod. The second piston of the first piston pair is connected to the first piston of the second piston pair by a second connecting rod. A fuel supply is connected to at least one of the first cylinder or the second cylinder.

Abstract: A reed valve for an internal combustion engine has petals which are curved, such that each petal has a concave surface that faces a concave surface of another petal. The curvature of the petals makes the petals more responsive to changes in pressure, thus enabling the valve to begin to open or close more rapidly. The petals preferably have a permanent curvature, and may also be tapered, so that their thickness is least at their distal ends. The reed valve made with the petals described above enhances the performance of internal combustion engines.

Abstract: A hydraulically controlled fan drive system for controlling the cooling of an engine and having a method of engagement includes a housing assembly containing a hydraulic fluid and an engaging circuit. The engaging circuit includes a pitot tube coupled within the housing assembly that receives at least a portion of the hydraulic fluid as the housing assembly rotates to drive a clutch pack (and coupled fan) via static pressure. A fluid controller having binary control adjusts the static pressure within the pitot tube at a given rotational speed, thereby controlling the engagement of the clutch pack to a fully engaged drive (utilizing friction type engagement), a fully disengaged drive, and at least two partially engaged clutch positions (i.e. partially engaged utilizing a wet viscous type clutch engagement). To control static pressure release, the fluid controller may utilize a dual spool system valving arrangement or a parallel fixed orifice binary control.