Abstract: A dual circuit lubrication system for a power end of a reciprocating pump that includes a lubrication pump that supplies lubrication fluid to a high pressure lubrication circuit and a low pressure lubrication circuit. The high pressure lubrication circuit is fluidly coupled to a crankshaft to supply lubrication fluid to journal surfaces associated with the crankshaft at a first lubrication fluid pressure. The crankshaft drives a crosshead coupled to a plunger to displace fluid from a fluid end of the reciprocating pump. The low pressure lubrication circuit is fluidly coupled to supply the lubrication fluid to a plurality of roller bearing surfaces associated with the crankshaft at a second lubrication fluid pressure. The first lubrication fluid pressure is greater than the second lubrication fluid pressure.

Abstract: The present invention discloses an apparatus for optimizing the fuel/air mixing process of an internal combustion engine. The bottom surface of the cylinder head is provided with a plurality of brackets; a ring is fixed to the brackets; and the ring may be an integrated ring body and may also be composed of a plurality of small segments. The ring is positioned opposite to a fuel injector and located in an area where fuel flows in the combustion chamber. The ring can continuously guides the fuel during the fuel injection process. The ring can be arranged in the liquid-phase region, the gas-liquid two-phase region or the gas-phase region. When the location of the ring interferes with the movement of valves of the internal combustion engine, the part of the ring body that interferes with the movement of the valves can be removed.

Abstract: An apparatus according to which a power end of a reciprocating pump assembly includes a block having bores formed therethrough, and crossheads disposed in the bores and adapted to reciprocate therein. A lubrication pump is in fluid communication with the bores. The pump is operable to pump lubrication fluid into each of the bores so that the crossheads are lubricated as they reciprocate within their respective bores. In another aspect, a power end includes a crosshead block and a power frame connected thereto, the frame including rib plates and supporting the crosshead block. In yet another aspect, a method includes casting a crosshead block; fabricating rib plates; connecting the rib plates to form a frame; and connecting the cast crosshead block to the frame. In some embodiments, the power ends may be used in oilfield operations such as, for example, the cementing, acidizing, or fracturing of a subterranean wellbore.

Abstract: An apparatus includes a valve and an actuator. The valve has a portion movably disposed within a valve pocket defined by a cylinder head of an engine. The valve is configured to move relative to the cylinder head a distance between a closed position and an opened position. The portion of the valve defines a flow opening that is in fluid communication with a cylinder of an engine when the valve is in the opened position. The actuator is configured to selectively vary the distance between the closed position and the opened position.

Abstract: A hydraulic valve, in particular for a phaser of a cam shaft, the hydraulic valve including a bushing including a piston that is displaceable in a bore hole along a longitudinal direction; a supply connection configured to supply a hydraulic fluid; at least a first operating connection and a second operating connection; and at least one tank drain configured to drain the hydraulic fluid, wherein the first operating connection and the second operating connection are alternatively connectable with each other and/or with the supply connection and/or with the at least one tank drain through at least one check valve by displacing the piston.

Abstract: A labyrinth seal system comprises a knife element and a stator element, the knife element having a plurality of teeth radially extending from a base and the stator element having a radially inner surface configured to interact with the plurality of teeth to create a seal. The knife element is axially constrained by and rotationally coupled to a turbine component, but has a degree of freedom in the radial direction with respect to that component.

Abstract: A dual circuit lubrication system for a power end of a reciprocating pump that includes a lubrication pump that supplies lubrication fluid to a high pressure lubrication circuit and a low pressure lubrication circuit. The high pressure lubrication circuit is fluidly coupled to a crankshaft to supply lubrication fluid to sliding surfaces associated with the crankshaft at a first lubrication fluid pressure. The crankshaft drives a crosshead coupled to a plunger to displace fluid from a fluid end of the reciprocating pump. The low pressure lubrication circuit is fluidly coupled to supply the lubrication fluid to a plurality of rolling surfaces associated with the crankshaft at a second lubrication fluid pressure. The first lubrication fluid pressure is greater than the second lubrication fluid pressure.

Abstract: A pressuring system for a vehicle engine includes an intake manifold into which ambient gases flows. A control valve connects to the intake manifold. An engine block connects to the intake manifold and connected to a gases outlet. A timing belt cover connects to the engine block. A gases pipe connects between the control valve and the timing belt cover.

Abstract: An apparatus includes a valve and an actuator. The valve has a portion movably disposed within a valve pocket defined by a cylinder head of an engine. The valve is configured to move relative to the cylinder head a distance between a closed position and an opened position. The portion of the valve defines a flow opening that is in fluid communication with a cylinder of an engine when the valve is in the opened position. The actuator is configured to selectively vary the distance between the closed position and the opened position.

Abstract: The present disclosure provides a button for a rocker arm assembly. The button includes a head portion. The button includes a shank extending from the head portion along a longitudinal axis. The button further includes a base portion extending from the shank. The base portion has a bottom surface, wherein the bottom surface has a substantially concave profile.

Abstract: A method includes coupling a cylinder head to a cylinder block. A valve member is then moved into a valve pocket defined by the cylinder head such that a first stem portion of the valve member engages an actuator. A first portion of the biasing member is then disposed against a second stem portion of the valve member, the second stem portion being opposite the first stem portion. An end plate is then coupled to the cylinder head such that a second portion of the biasing member engages the end plate.

Abstract: A switchable device for supplying at least one consumer of an internal combustion engine with pressure.

Abstract: In a fuel injection valve support structure, a pair of contact surfaces are formed on an intermediate portion of the valve so as to be opposite to each other with a plane therebetween, the plane including a center axis of the valve and a center line of a coupler, the elastic support member includes a base plate placed on a second load receiving portion, an elastic piece extending from the base plate, coming into pressure contact with a fuel supply cap elastically, and biasing the valve against an engine by a reaction force resulting from the contact, and a pair of rotation locking pieces extending from the base plate and coming into contact with the respective contact surfaces to restrict rotation of the valve about the axis, and at least one of the contact surfaces has a positioning groove for elastically engaging corresponding one of the rotation locking pieces.

Abstract: An engine includes an engine casing and a first piston configured to reciprocate relative to the engine casing. The first piston has a wall that defines a substantially cylindrical chamber. One or more second pistons are configured to reciprocate inside the substantially cylindrical chamber. A combustion chamber intake port and a combustion chamber exhaust port extend through the wall. A shutter is outside the wall and is movable between a first position substantially blocking fluid flow through the combustion chamber exhaust port but not blocking fluid flow through the combustion chamber intake port and a second position substantially blocking fluid flow through the combustion chamber intake port but not blocking flow through the combustion chamber exhaust port. An actuator causes the shutter to move between the first position and the second position in response to the first piston reciprocating relative to the engine casing.

Abstract: A valve device controls the air intake for a compressor of a vehicle. The valve device includes a valve housing having a first compressed air inlet for connecting to an ambient air infeed, a second compressed air inlet for connecting to a charge air infeed, through which pre-compressed air can be fed, and a compressed air outlet for connecting to the compressor. The valve device includes a first switched state in which the compressed air outlet is fluidically connected to the first compressed air inlet, and a second switched state in which the compressed air outlet is fluidically connected to the second compressed air inlet. The valve device includes a switching device capable of switching the valve device between the first switched and the second switched state.

Abstract: An apparatus includes a valve and an actuator. The valve has a portion movably disposed within a valve pocket defined by a cylinder head of an engine. The valve is configured to move relative to the cylinder head a distance between a closed position and an opened position. The portion of the valve defines a flow opening that is in fluid communication with a cylinder of an engine when the valve is in the opened position. The actuator is configured to selectively vary the distance between the closed position and the opened position.

Abstract: A method includes coupling a cylinder head to a cylinder block. A valve member is then moved into a valve pocket defined by the cylinder head such that a first stem portion of the valve member engages an actuator. A first portion of the biasing member is then disposed against a second stem portion of the valve member, the second stem portion being opposite the first stem portion. An end plate is then coupled to the cylinder head such that a second portion of the biasing member engages the end plate.

Abstract: Multi-section sleeve valves for internal combustion engines for improved aspiration. An open connecting rod section is separated from an internal, tubular passageway by a closed wall. A port section proximate the wall defines valve ports. A midsection borders the port section, and an open section adjacent the midsection is in fluid flow communication with the tubular passageway. The lower-diameter midsection forms a relief annulus between the valve and the tunnel or sleeve in which the valve is disposed. Fluid flow occurs through the valve interior and through ports dynamically positioned above the compression cylinder, proximate aligned sleeve and head ports. Sleeve ports are separated by bridges that maintain valve rings in compression during reciprocation to prevent damage. High pressure gas is confined between axially spaced apart, stepped sealing rings that prevent gases from flowing axially about the valve exterior.

Abstract: A sliding valve assembly includes a valve body having a fluid conducting port adjacent to a fluid impervious surface. The actuator allows fluid to travel through the valve assembly and into a fluid blocking position where the fluid impervious surface obstructs the fluid from traveling through the valve assembly. First and second sealing assemblies include a primary seal ring, a secondary seal ring around the primary seal ring, and a spring forcing the primary seal ring against a sealing surface. As pressure in the system increases, this pressure is delivered to the sealing assemblies to force them against the sealing surfaces to enhance the sealing relationship. Cams and cam followers affixed to the valve body overcome the frictional forces of the sealing system and the valve body and valve housing to increase the efficiency of the valve assembly and the system in which the valve assembly is used.

Abstract: A switchable device for supplying at least one consumer of an internal combustion engine with pressure.

Abstract: An engine has an auxiliary cylinder 2 and a valve body 6 slidable in this cylinder. The valve body 6 has a gas space 7 formed in it. The engine further has an actuator for shifting the valve body 6 to switch the communication between the main combustion chamber and the gas space 7 and the isolation of the chamber and cavity from each other. The slidable valve may function as a compression ratio changer, which switches the communication and the isolation according to the load on the piston. In this case, the engine has a third compression ring 18. The slidable valve may also function as a suction or exhaust valve, which switches the communication between the combustion chamber and auxiliary passage and the isolation of the chamber and passage from each other during the suction or exhaust strokes. This improves the suction or exhaust efficiency of the engine.

Abstract: An inlet valve includes a valve head including a valve surface located at a circumferential edge portion, and a single annular circumferential edge groove disposed radially inside and close to the valve surface in the circumferential edge portion. When intake air (an airflow) proceeds along a surface of the valve head and reaches the circumferential edge portion, only a portion thereof (a partial airflow) enters the circumferential edge groove and the remaining thereof (remaining partial airflow) passes by the circumferential edge groove. As the intake air (the partial airflow) having entered the circumferential edge groove forms a turbulent flow, the intake air surrounds the circumferential edge portion of the valve head and reaches below the circumferential edge portion of the valve head, thereby achieving an increase in volume of air taken into a combustion chamber.

Abstract: An automotive engine valve stem, engine valve and method of producing both. The valve includes a head and a stem joined to the head. Lightweight, high-temperature materials, such as titanium-based materials may be used to make up at least a the majority of the valve. These materials are combined with fabrication techniques that may vary between the head and the stem, where at least a part of the valve is made by dynamic magnetic compaction. While a majority of the stem may be made from a titanium-based powder material, its tip may be made of a high strength hardened material, such as a steel alloy. The valve head may be made by single press and sintering, double press and sintering, forging and machining, forging and sintering, and dynamic magnetic compaction and sintering.

Abstract: An internal combustion engine uses separate, tubular and hollow reciprocating sleeve valves that open and close intake and exhaust passageways for improved aspiration. The sliding sleeve valves are disposed within sleeves horizontally disposed within a modified head secured above the combustion chamber. The valves are driven in a path normal to the engine pistons by an independent crankshaft that is rotated through an external pulley driven by the engine crankshaft. Fluid flow occurs through the valve interior and through ports dynamically positioned above the compression cylinder, proximate aligned sleeve and head ports. Sleeve ports are separated by bridges that maintain valve rings in compression during reciprocation to prevent damage. Each valve body has a reduced diameter midsection forming a relief annulus that distributes shearing pressures about the circumference of the valve.

Abstract: A central valve of a camshaft adjuster of an internal combustion engine, which has a valve housing, a control piston, and a mounting flange. The valve housing is arranged, at least in part, inside a receptacle inside the camshaft adjuster. The valve housing has at least one inflow connection, one outflow connection, and one working connection. The control piston is arranged axially slidable inside the valve housing. The pressure fluid, which flows to and from the camshaft adjuster, can be controlled by the suitable positioning of the control piston inside the valve housing. Also, the mounting flange is fixedly connected to a wall section of the receptacle, thus determining the axial position of the valve housing relative to the camshaft adjuster.

Abstract: To improve the precision of the control of the charge of a cylinder during idling and low revs/light load operation, a bypass feeding path of low flow capacity provides the cylinder with air or mixture while the high flow capacity intake valves stay closed.

Abstract: A control valve for controlling pressure medium flows, including: a valve housing having a hollow construction and having at least one feed connection, at least two working connections, and at least one discharge connection; a control piston held displaceably inside the valve housing, through which, dependent on position, the feed connection can be connected via at least one pressure medium line to the one or to the other working connection, while the respectively other working connection is connected via at least one second pressure medium line to the discharge connection. The control piston has a piston cavity and the first pressure medium line includes a feed opening allocated to the feed connection and a discharge opening allocated to the working connections, with each of these openings opening into the piston cavity.

Abstract: A control valve for a device for variably adjusting the control times of gas-exchange valves of an internal combustion engine. The control valve has a substantially hollow cylindrical valve housing, a non-return valve and an annular filter. The annular filter is arranged within the valve housing and the non-return valve has a closing body and a spring element.

Abstract: An internal combustion engine employing a valve regulating the passage of a fluid between the hollow interior of the combustion chamber and the atmosphere. The valve includes a valve body having a valve opening and a blade track passing around the valve opening. A guillotine blade slides linearly along the blade track between an open position in which said fluid may pass through the valve opening and a closed position in which the fluid is restricted from passing through the valve opening. A reciprocating driver moves the guillotine blade along the blade track when actuated by an electronic control signal.

Abstract: A method includes coupling a cylinder head to a cylinder block. A valve member is then moved into a valve pocket defined by the cylinder head such that a first stem portion of the valve member engages an actuator. A first portion of the biasing member is then disposed against a second stem portion of the valve member, the second stem portion being opposite the first stem portion. An end plate is then coupled to the cylinder head such that a second portion of the biasing member engages the end plate.

Abstract: A valve apparatus for an internal combustion engine, the valve apparatus including: a main part having a wall section defining a valve cavity extending along a longitudinal length of the main part and an opening located in the wall section of the main part, the opening flow connected to the combustion chamber; an outer part configured and arranged so as to be reciprocally located in the valve cavity, the outer part having a wall section defining an inner passage extending along a longitudinal axis thereof; an inner part having a first end situated outside of the cavity and a second end situated within the cavity and the inner passage of the outer part, the inner part having a wall section defining an inner passage, a first opening at the first end, and one or more openings in that part of the walled section which is situated within the cavity.

Abstract: For reducing the NOx-emission of a large sized two stroke diesel engine having at least one combustion room (3), a reciprocating piston (4) and an exhaust opening (12) controlled by an exhaust valve (13) at each work cyclus a small volume of burnt gas is retained in the combustion room (3) and so added to the fresh air for the next combustion. For achieving this retention of burnt gas the underside of the valve disc (15) off the exhaust valve (13) is provided with a shallow concave face (17) building a basin-like collection room, whose depth is within a range of 2-10% of the outer diameter of the valve disc (15).

Abstract: A gravity-activated valve for use in supplying an uninterrupted supply of fluid is disclosed. The valve includes a housing having an outlet, an inlet positioned below the outlet, and a sleeve disposed within the housing. The valve also includes a buoyant piston disposed within the sleeve, which is adapted to move between an open position and a closed position. The piston is positioned above the outlet when the piston is in the open position to allow fluid flow through the outlet and positioned proximate the outlet in the closed position to prevent fluid flow through the outlet. The piston is in the open position when the fluid level exceeds a predetermined fluid level and in the closed position when the fluid level is at or below the predetermined fluid level. The valve further includes a plurality of gaskets, which are adapted to create a seal between the piston and the sleeve.

Abstract: A sliding valve assembly includes a valve body having a fluid conducting port adjacent to a fluid impervious surface. The actuator allows fluid to travel through the valve assembly and into a fluid blocking position where the fluid impervious surface obstructs the fluid from traveling through the valve assembly. First and second sealing assemblies include a primary seal ring, a secondary seal ring around the primary seal ring, and a spring forcing the primary seal ring against a sealing surface. As pressure in the system increases, this pressure is delivered to the sealing assemblies to force them against the sealing surfaces to enhance the sealing relationship. Cams and cam followers affixed to the valve body overcome the frictional forces of the sealing system and the valve body and valve housing to increase the efficiency of the valve assembly and the system in which the valve assembly is used.

Abstract: An internal combustion engine employing a valve regulating the passage of a fluid between the hollow interior of the combustion chamber and the atmosphere. The valve includes a valve body having a valve opening and a blade track passing around the valve opening. A guillotine blade slides linearly along the blade track between an open position in which said fluid may pass through the valve opening and a closed position in which the fluid is restricted from passing through the valve opening. A reciprocating driver moves the guillotine blade along the blade track when actuated by an electronic control signal.

Abstract: A valve apparatus for an internal combustion engine, the valve apparatus including: a main part having a wall section defining a valve cavity extending along a longitudinal length of the main part and an opening located in the wall section of the main part, the opening flow connected to the combustion chamber; an outer part configured and arranged so as to be reciprocally located in the valve cavity, the outer part having a wall section defining an inner passage extending along a longitudinal axis thereof; an inner part having a first end situated outside of the cavity and a second end situated within the cavity and the inner passage of the outer part, the inner part having a wall section defining an inner passage, a first opening at the first end, and one or more openings in that part of the walled section which is situated within the cavity.

Abstract: An engine has an auxiliary cylinder 2 and a valve body 6 slidable in this cylinder. The valve body 6 has a gas space 7 formed in it. The engine further has an actuator for shifting the valve body 6 to switch the communication between the main combustion chamber and the gas space 7 and the isolation of the chamber and cavity from each other. The slidable valve may function as a compression ratio changer, which switches the communication and the isolation according to the load on the piston. In this case, the engine has a third compression ring 18. The slidable valve may also function as a suction or exhaust valve, which switches the communication between the combustion chamber and auxiliary passage and the isolation of the chamber and passage from each other during the suction or exhaust strokes. This improves the suction or exhaust efficiency of the engine.

Abstract: An apparatus for the operation of a work object, in which the work object has a chamber adapted to receive a work material for the performance of an operation of the work material and converting the work material into a resulting substance and the apparatus has a first passage adapted to supply the work material to the chamber; a second passage adapted to release the resulting substance from the chamber; and a pair of slideable members individually moveable relative to the first passage and the second passage to control the operation in the chamber.

Abstract: An intake valve assembly of an internal combustion engine that includes a combustion chamber and an intake passage. The intake valve assembly comprises a primary valve provided to seal against a primary valve seat formed in an intake port, a secondary valve mounted about the primary valve coaxially therewith and provided to seal against a secondary valve seat formed in the intake port, and a secondary valve lifter fixed to the primary valve so as to be axially spaced from the secondary valve when both the primary and secondary valves are in closed positions. The secondary valve is operated mechanically by the secondary valve lifter and fluidly in response to pressure differential between the intake passage and the combustion chamber.

Abstract: A method includes operating an internal combustion engine according to a four-stroke combustion cycle. The four-stroke combustion cycle includes a combustion stroke, an exhaust stroke, an intake stroke and a compression stroke. A valve associated with a cylinder of the internal combustion engine is opened at a first time during the four-stroke combustion cycle. The valve is closed at a second time during the four-stroke combustion cycle. The valve is opened at a third time during the four-stroke combustion cycle. The valve is closed at a fourth time during the four-stroke combustion cycle.

Abstract: Air control valve apparatus (1) for internal combustion engines (2) having a turbocharger (3), wherein the air control valve apparatus (1) is arranged in a bypass channel (4) between the pressure side (5) and the suction side (6) of a boost pressure pump of the turbocharger, having a housing (7) which has an electromagnetic drive unit (8) having a coil (9), a yoke (10) and a core element (11), and a valve unit (12) which can be moved in the housing (7), wherein means (13) are provided which hold the movable valve unit (12) in the closed position in the currentless state, and wherein at least one pressure equalization opening (14) is provided on the movable valve unit (12), wherein the at least one pressure equalization opening (14) can be closed by at least one switching element (15).

Abstract: An apparatus includes a cylinder head and a valve member. The cylinder head is configured to be coupled to a cylinder and a gas manifold and has an interior surface defining a valve pocket. The valve member is configured to be disposable within the valve pocket such that the valve member is movable within the valve pocket along a longitudinal axis of the valve member. The valve member has a tapered portion defining multiple valve flow passages. The apparatus has a first configuration and a second configuration. When the apparatus is in the first configuration, each valve flow passage is in fluid communication with the cylinder and the gas manifold. When the apparatus is in the second configuration, each valve flow passage from the plurality of valve flow passages is fluidically isolated from the cylinder.

Abstract: An apparatus includes a valve member configured to be reciprocatably disposed within a valve pocket defined by an interior surface of a cylinder head. The valve member has a tapered portion defining multiple flow passages and including multiple sealing portions. At least one sealing portion is disposed adjacent each flow passage and is configured to contact a portion of the interior surface of the cylinder head such that each flow passage is configured to be fluidically isolated from an area outside of the cylinder head.

Abstract: An apparatus includes a cylinder head and a valve member. The cylinder head is configured to be coupled to a cylinder and a gas manifold and has an interior surface defining a valve pocket. The valve member is configured to be disposable within the valve pocket such that the valve member is movable within the valve pocket along a longitudinal axis of the valve member. The valve member has a tapered portion defining multiple valve flow passages. The apparatus has a first configuration and a second configuration. When the apparatus is in the first configuration, each valve flow passage is in fluid communication with the cylinder and the gas manifold. When the apparatus is in the second configuration, each valve flow passage from the plurality of valve flow passages is fluidically isolated from the cylinder.

Abstract: The invention is related to an arrangement that is designed to control inlet and outlet gas mixtures and is used mainly in four stroke combustion engines. Prior art designs are of a kind that limits the performance of the four-stroke engine mainly as a result of the weight and its flow-technical design. The invention resolves this problem by providing a valve design that allows both the inlet and outlet gas mixtures to flow inside and through the valve body, which facilitates a valve design that is lighter and has an higher efficiency due to the flow-technical aspects, e.g. eliminating any valve shaft obstructing the flow path.

Abstract: An electromechanical valve assembly 46 for an internal combustion engine 36 is provided. The valve assembly 46 includes a rotor 68 centered about a first axis 122 having a bore 114 extending generally axially therethrough. The valve assembly 46 further includes a stator 66 operatively disposed about the rotor 68 for producing a torque to cause rotation of the rotor 68 about the axis 122. Finally, the valve assembly 46 includes a valve 70 having a valve stem 126 and a valve head 84 The valve stem 126 extends generally axially through the bore 114 of the rotor 68. The valve stem 126 is also configured to move generally axially responsive to the rotation of the rotor 68 to selectively engage and disengage the valve head 84 with a valve seat 124 of the engine 36.

Abstract: A self-cleaning valve for removing hydrocarbon deposits from pressure responsive automatic air intake valves in an internal combustion engine. The self-cleaning valve assembly of the present invention removes soot which naturally accumulates on the surface of the valve as a result of the heat generated by the combustion event when hydrocarbon fuel sources are used. A reciprocating slider is seated within a bushing. The bushing is fluted with small relief passages along its length. The fluted relief passages run more or less parallel to the direction of the movement of the slider, and provide channels for removing soot from the surface of the valve. Repeated closing of the slider hammers soot upwardly into the relief passages, thereby maintaining the valve free of potentially fouling hydrocarbon deposits.

Abstract: An engine valve device, wherein an opening part (7) smaller in area than the end surface of a piston (5) is provided in the end surface of a cylinder (3) to form a valve seat (8), and a valve disc (9) in contact with the valve seat (8) is disposed on the outerside of the valve seat (8) so that the cylinder (3) can be moved away from and toward the valve disc (9) and, in a compression stroke when the piston (5) rises, the valve seat (8) is in press-contact with the fixed valve disc (9) because upward force is applied to the upper end surface of the cylinder (3) and the cylinder (3) is urged toward the valve disc, and the area of the opening part is increasable up to the ultimate diameter of the piston, providing a highly airtight, simple-structured valve device yielding high engine energy efficiency.

Abstract: A multi-valve internal combustion engine using a cam actuated piston/plunger type valve made of metal or other material operating in a companion cylinder with ported passages to the control intake and exhaust functions of an internal combustion engine. The piston valve is fitted with snap type piston rings of the gap sealing design. The piston valve is actuated and controlled by a cam and spring arrangement. Opening of the piston valve is accomplished by spring tension on the valve as rotation of the cam allows the valve to open. As the cam turns, closure is accomplished by the action of the cam against the piston valve.

Abstract: An internal combustion engine having one or more power pistons reciprocating in one or more cylinders has at least one fuel inlet valve of the piston type at each cylinder. An inlet valve sleeve has an open end at the top of the cylinder and has fuel inlet ports situated away from the cylinder. A valve piston in the sleeve is movable towards the cylinder and away from the cylinder by an actuator system to open and close the valve. The actuator system varies timing and duration of the open periods of the valve to control engine power output thereby eliminating any need for a throttle valve and its attendant power losses. Valve piston movement also varies the effective compression ratio in the engine cylinder as a function of power output thereby further increasing fuel efficiency.