Abstract: A control method for modulating the torque in an internal combustion engine with mechanical power transmission and with pneumatically, hydraulically or electromagnetically controllable valves that are open and closed based on signals from a control system, by which method a torque that is requested in an operative situation at a certain moment is provided by a selection of the frequency with which power strokes are performed by controlling the number of power strokes in relation to the number of idle strokes. The power strokes take part in 2-stroke cycles or 4-stroke cycles, and one or more 2-stroke cycles are alternated with or more 4-stroke cycles.

Abstract: A fuel system for supplying LPG fuel, the system including a fuel storage tank and a fuel transfer tank. A first pump pushes fuel to a vehicle engine from the transfer tank and excess fuel from the engine is returned to the storage tank or the transfer tank. A second pump pulls fuel from the storage tank into the transfer tank when a fluid level within the transfer tank falls below a certain level. A method of providing LPG fuel to the engine of a vehicle.

Abstract: A cylinder head 12 showing a guideway in which is located a rotatable valve 10, 12 comprising a fluid port operable to effect fluid communication between a cylinder and a fulid manifold in the guideway, whereby rotation of the valve effects alignment of the fluid port with the combustion chamber of a cylinder 4 to enable fluid flow between the valve 10, 12 and a cylinder 4, and wherein the cylinder head 2 further comprises a seal 22 which, in use, is movable from a first, non-sealing position in which the seal 22 is biased away from the valve 10, 12, and a second, sealing position in which the seal 22 is biased onto the valve by gaseous pressure from within a cylinder 4.

Abstract: In a cylinder head structure of a multi-cylinder engine, a head-side water jacket is provided in the cylinder head, a lateral rib extending in the engine width direction is provided at an upper face of the portion located between cylinders of bottom deck, the lateral rib bifurcates, getting around intake-side and exhaust-side connecting holes connecting the head-side water jacket with a water jacket in cylinder block, its both ends are connected with intake-port and exhaust-port walls, and its top portion is configured so as to become taller gradually from its central portion toward its outside portions. Accordingly, rigidity of the portion located between cylinders of the cylinder head can be increased in the cylinder-line direction as well as in the vertical direction, which can improve the sealing between the cylinder block and the cylinder head.

Abstract: The invention is an improved power transmission drive, for an internal combustion engine. The drive is of the type having a flexible link medium for transmitting power between a crankshaft of said internal combustion engine and drive components not associated with a primary purpose of the internal combustion engine. The drive is improved by the inclusion of a drive frame, a camshaft sprocket releasably mounted upon the drive frame, a crankshaft drive-wheel releasably mounted upon the drive frame, an engine accessory mounted upon the drive frame, an accessory drive-wheel mounted upon a shaft of the engine accessory, and the camshaft sprocket, the crankshaft drive-wheel, and the accessory drive-wheel each entrained by the flexible link medium.

Abstract: A liquified gas delivery system for a motorized platform includes a holding tank configured to receive liquified gas. A first conduit extends from a vapor holding portion of the tank to a valve device. A second conduit extends from a liquid holding portion of the tank to the valve device. Fluid coupled to the valve device is a vaporizer which is in communication with an engine. The valve device selectively withdraws either liquified gas or liquified gas vapor from the tank depending on the pressure within the vapor holding portion of the tank. Various configurations of the delivery system can be utilized for pressurizing the tank during operation.

Abstract: For attaching the oil sump (10) to the engine block (30) of a combustion engine, a seal is made between the engine block (30) and the oil sump (10) by means of a curable composition (20). The adhesion of the composition (20) when cured is sufficient to secure the oil sump (10) to the engine block (30). The adhesion should be at least 0.5 N/mm2, especially more than 0.8 N/mm2. The curable composition (20) can be a silicone composition. The oil sump (10) can be fixed to the engine block (30) at least during the curing of the composition (20). To this end, the edge of the oil sump can be designed such that a self-fixing takes place when the oil sump (10) is joined to the engine block (30).

Abstract: This engine relies on a flywheel having a flywheel axis and an undulating cam surface. A piston wit a roller at its base is positioned in a cylinder such that the roller abuts the undulating cam surface at some radial distance from the flywheel axis. Thus, as the piston is pushed downward by combustion pressure in the cylinder, it pushes against the cam surface causing the flywheel to rotate. As the flywheel continues to rotate its undulating surface pushes the piston back into position for a repetition of the cycle. The cam surface can be configured to control engine parameters such as compression ratio, duration of intake stroke, duration of exhaust stroke, duration of combustion stroke, duration of power stroke, compression stroke pattern, volumetric efficiency, or power stroke pattern.

Abstract: In a coolant pump arrangement in a cooling circuit of an internal combustion engine, including a first coolant pump having a drive mounted on a pump shaft at one side of the first coolant pump, a second coolant pump is connected to the pump shaft at the other side of the first coolant pump via a transmission arrangement including a clutch and a speed change drive for controlling operation of the second coolant pump relative to the first coolant pump.

Abstract: To improve productivity of a connection member between first and second carburetors, and to reduce maintenance work area for a main drive throttle valve lever, a driven throttle valve lever and a connection lever, a main drive throttle valve lever is arranged to protrude in one side of a first carburetor, a driven throttle valve lever is arranged to protrude in one side of a second carburetor, the main drive throttle valve lever and the driven throttle valve lever are connected in one side by a connection lever. A cup member provided with a bottom portion and a peripheral wall portion and formed in a cup shape is arranged fixedly in one side of the first and second carburetors, the first and second carburetors are connected by the cup member, an opening portion of the cup member is closed by a cover member, and the main drive throttle valve lever, the driven throttle valve lever and the connection lever are arranged so as to be received inside the cup member closed by the cover member.

Abstract: In a fuel supply system for an internal combustion engine having two separate storage containers for liquid fuels, both connected to a first controllable valve which is connected, via a connecting line including a fuel pump to an inlet of a second controllable valve having two outlets in communication by separate fuel lines with a fuel injection nozzle of the internal combustion engine, each of the two separate fuel lines includes a fuel pressure regulator, one being in communication with one and the other with the other of the two separate fuel storage containers for returning exess fuel to the fuel storage container from which fuel is being supplied to the fuel injection nozzle.

Abstract: A method and apparatus for hydrogen generation for enriching a hydrocarbon based fuel for an internal combustion engine with hydrogen extracted from a saltwater, electrolyte solution through electrolysis. A current is applied to a positively charged anode and a negatively charged cathode submerged in a saltwater solution to dissociate and separate diatomic molecules of hydrogen and oxygen therefrom. The harvested hydrogen is delivered to the carburetor of the engine through a mixing tube venturi and introduced to the hydrocarbon fuel being pumped thereto and the hydrogen and hydocarbon fuel are mixed and atomized prior to delivery to the combustion chamber.

Abstract: A method for regulating the temperature of a coolant of an internal combustion engine, including a temperature sensor detecting the temperature of the coolant and a first control unit controlling and/or regulating the coolant temperature to obtain a predetermined temperature setpoint value, a further control unit being provided whose signals are fed to the first control unit, the further control unit relaying signals about an established driver type to the first control unit and, depending on whether the driver type is classified as sporty or economical, the first control unit presetting the temperature setpoint value, in which a coolant volume flow for cooling the internal combustion engine is regulated or controlled by the control unit as a function of the driver type established.

Abstract: A lubrication device for a dry-sump, four-stroke engine includes a crankcase having a divider wall interposed between a crank chamber and a separate adjoining chamber. A crankshaft is housed in the crank chamber and is driven by reciprocating movement of pistons. A crank web faces the divider wall, which has a through hole for connecting the crank chamber with the separate chamber, and is opened by the crank web when the piston moves from a top dead center position toward a bottom dead center position, and is closed when the piston moves from the bottom dead center toward the top dead center position. A return hole connects the crank chamber and the separate chamber, for returning lubricant oil that flowed through the through hole into the separate chamber from the crank chamber, back to the crank chamber by utilizing pressure fluctuations within the crank chamber.

Abstract: An engine has a lubrication system to lubricate at least a portion of the engine with lubricant. The lubrication system has a lubrication pump that periodically pressurizes the lubricant toward the portion of the engine. A first sensor senses an engine speed. A second sensor senses an engine load. A third sensor senses a temperature of the lubricant or the engine. A control device controls the lubrication pump. The control device determines a frequency of periodic pressurization by the lubrication pump based upon outputs from the first and second sensors. The control device determines a pressurization time of the lubrication pump based upon at least one of outputs from the first sensor, second sensor, third sensor, and a battery voltage.

Abstract: A rotary shaft pump for increasing supplied oil pressure to a pressure responsive device in an internal combustion engine. The pump includes a housing adapted to carry a plurality of axially spaced journals of a rotatable shaft. The shaft also includes at least one pumping element having a larger diameter than the other journals of the shaft. A cam phaser carried on one end of the shaft receives pressurized oil from the engine through oil passages extending through the housing and the shaft. As the oil is pumped through the oil passages of the shaft, the oil is centrifugally pumped through a radially extending pumping passage extending though the pumping element to boost oil pressure supplied to the cam phaser.

Abstract: A modular family of internal combustion engines is described. The family includes at least three engine configurations selected from a single cylinder, V-type, inline, opposed, W-type, and radial configurations. Each of the engines in the family includes at least one cylinder with identical top end packages. A method for designing such a family of engines is also disclosed. A family of recreational vehicles and method for designing a family of recreational vehicles is also disclosed.

Abstract: A hydraulic control device for valve trains of an engine having cylinders which are optionally deactivated by applying oil pressure to the valve train so as to suspend the operations of associated intake and exhaust valves, the hydraulic control device comprising a plurality of rocker shafts which are arranged in line, and each of which is provided with hydraulic passages therein for applying oil pressure to each of the valve trains so as to activate and deactivate the cylinders, a plurality of sets of hydraulic circuits, which are provided to the rocker shafts, respectively, for applying oil pressure to each of the rocker shafts, and oil pressure measuring sections provided to the hydraulic circuits, respectively, for measuring oil pressure in each of the hydraulic circuits.

Abstract: A system for retaining a sensor on an injection molded intake manifold that uses a twist-lock connection within the receiving port. The sensor body has outwardly projecting lugs that pass between inwardly projecting lugs in the receiving port. The face of the manifold is formed with external guiding projections around the receiving port that direct insertion of the sensor into the receiving port in a specific first, unlocked orientation, and permit rotation of the sensor to a second, locked orientation. After the sensor is rotated to the locked orientation, attachment of an external connector, such as a wire harness, prevents the sensor from being rotated back to the first, unlocked orientation by interfering with the external guiding projections.

Abstract: A system for an internal combustion engine (10) arranged for being powered with a fuel mixed with a lubricant, which system includes:—a detector (16) arranged for detecting the presence of a given additive in the lubricant mixed fuel—an electronic module (24) arranged for comparing the detected presence of the additive with a predetermined threshold value, and designed so that if the lubricant is not mixed in the fuel, or has been mixed in the fuel in an amount lower than a through the additive against the threshold value correlated amount, by means of an indicator (30) indicate that a lack of lubricant is at hand in the fuel and/or by means of a connection (26) to an ignition or injection system (11) for the engine (10) prevent or modify the operation of the internal combustion engine if said lack of lubricant is at hand in the fuel. The invention also refers to the method of how the system operates.