Abstract: A CCV apparatus that exhausts blow-by gas from a crankcase effectively and thereby prevents pressure in a crankcase from excessively increasing may include: a lower case, a middle case comprising a body, an upper plate and a cup wherein the upper plate is provided with a blow-by gas passageway coupled with a filter in the cup for flowing blow-by gas into the body therethrough and at least a gas hole formed in the upper plate outside the cup for flowing the filtered blow-by gas in the body to the exterior of the cup, and an upper case enclosing an opening at an upper end of the cup. The apparatus further comprises a by-pass passageway selectively detouring the blow-by gas from the inlet pipe according to a pressure of the blow-by gas in the inlet pipe wherein the by-pass passageway is mounted at the exterior of the cases.

Abstract: A vapor purifier for oil recovery from and cleansing of deleterious matter carried by oil vapors in a crankcase of an internal combustion-type engine generally includes a coil member that can separate the oil from the vapors by passing the vapors over and/or through the coil member. As the vapors impinge upon the surface(s) of the coil member, oil in the blow-by vapors condenses thereon. The vapor purifier can include a flow equalization member to maintain a normal engine intake manifold pressure for driving modes of the engine. As a result, the vapor purifier of the present invention can maintain the air to fuel stoichiometric ratio of the engine system. Additional components, such as filters and/or disks can also be included in the vapor purifier to promote oil recovery and cleansing of deleterious matter from the vapors, which act as a host for the deleterious matter.

Abstract: A blow-by gas returning apparatus is arranged to allow blow-by gas leaking from a combustion chamber of an engine into a crank chamber to flow in an intake passage through a returning passage, and to regulate a flow rate of the blow-by gas by a PCV valve placed in the returning passage. A supercharger is placed in the intake passage. The PCV valve is adapted to change a position of the valve element by electromagnetic force to change a passage opening area. A check valve is placed integral with the PCV valve in the returning passage between the valve element of the PCV valve and the intake passage. The check valve is arranged to inhibit back-flow of the gas from the intake passage.

Abstract: A positive crankcase ventilation (PCV) system is provided for an internal combustion engine. The PCV system includes a centrifugal separator disposed within a shaft member, for example a balance shaft, of the internal combustion engine. The centrifugal separator is operable to impart rotational motion on the gases flowing through the shaft member such that the centrifugal forces urge the separation of oil particle entrained within the gases.

Abstract: An intake manifold is disclosed. The intake manifold includes a first chamber in fluid communication with a PCV line and disposed generally upstream of a second chamber. The chambers are designed to provide a long flow path for the moisture laden PCV gas and to help reduce the introduction of moisture or fluids into the second chamber. This helps to prevent the ingestion of moisture or fluids by the combustion chambers of engine. An optional fluid blocker can also be used to trap fluids and help prevent those fluids from entering a cylinder port.

Abstract: A blowby gas returning device is arranged to allow blowby gas leaking from a combustion chamber of an engine to flow in an intake passage through a returning passage and return to the combustion chamber, and arranged to regulate a flow rate of the blowby gas by a PCV valve provided in the returning passage. This blowby gas returning device comprises an outside-air passage for mixing outside air into the blowby gas before being introduced into the PCV valve; and an open-close valve for opening and closing the outside-air passage. An electronic control unit controls the open-close valve to open when the operating state detected by sensors is an idle state.

Abstract: A valve for crankcase ventilation of an internal combustion engine comprises a fresh-air side for connection with an intake section of the internal combustion engine, an engine side for connection with the crankcase and a valve insert movable as a whole for changing the flow resistance through the valve. Said valve inset is held inside said valve without pre-load. Said valve insert is designed to be freely displaced to a deventilation limit-stop position under negative pressure on the fresh-air side relative to the engine side, and to be freely displaced to a ventilation limit-stop position under excess pressure on the fresh-air side relative to the engine side. The valve insert id designed to open a deventilation cross-section in the deventilation limit-stop position and to open a deventilation cross-section that is different from the ventilation cross-section in the ventilation limit-stop position.

Abstract: A device and method for heating a positive crankcase ventilation system in a hybrid vehicle includes a ventilation device, provided on a crankcase, and a supercooling cycle for cooling power electronics for an electric motor of the hybrid vehicle. The ventilation device is heatable by way of the supercooling cycle in order to prevent icing of the ventilation device.

Abstract: A separator for separating liquids in a fluid stream generated by blow-by gases produced in a crankcase of an internal combustion engine wherein the fluid stream includes both gasses and liquids. The separator including an inlet in fluid connection with the engine for receiving the fluid stream and an outlet in fluid connection with the engine to return a gas stream to the engine. The separator further including a fluid path fluidly connecting the inlet to the outlet and a containment vessel in fluid connection with the fluid path. The separator having a fluid stream accelerator in the fluid path and the accelerator accelerating the fluid stream to at least partially separate the gasses from the liquids in the fluid stream.

Abstract: A flow control valve, comprising a flow controlling valve configured to deflect from a generally planar posture to an increasingly nonplanar posture responsive to a relative increase in pressure difference and flow across the valve element; and a support element including a support structure supporting the valve element in its undeflected state; at least a first contact surface recessed from the support structure and configured to engage the valve element only when the valve element is deflected; and a flow passage wherein an effective flow-through volume through the at least one opening and the flow passage decreases as deflection of the valve element increases.

Abstract: An object such as an electromagnetic valve is resiliently mounted (or in a floating manner) on a mounting base such as an intake manifold of an internal combustion engine. A valve port of the electromagnetic valve is connected to a connecting hole of the intake manifold via an O-ring, and a stay connected to the electromagnetic valve is coupled to a bolt via a resilient member such as a grommet. The bolt is rotated to be fastened to the intake manifold by screwing. A rod portion of the bolt is inserted into a hole of the grommet. Projections and depressions such as grooves extending along the rotational direction of the rod portion are formed on the inner surface of the grommet hole to reduce a contacting area and abrasion force between the grommet and the rod portion. In this manner, deformation of the grommet caused by rotation of the rod portion is suppressed.

Abstract: A positive crankcase ventilation system for an internal combustion engine is disclosed. The system includes an engine having a cylinder air intake system connected to associated cylinders and a filtered air inlet to a crankcase for admitting air to mix with crankcase vapors. A throttle is disposed in the cylinder air intake system for controlling airflow to the associated cylinders. The system further includes a venturi nozzle having an inlet and an outlet. The venturi nozzle inlet is connected to the crankcase for receiving the mixture of filtered air and crankcase vapors. The venturi nozzle outlet is connected to the cylinder air intake system at a location subject to variable intake vacuum pressure between the throttle and the cylinders to allow the mixture of filtered air and crankcase vapors to be drawn into the inlet air passing to the cylinders downstream of the throttle.

Abstract: A flow control valve is provided. According to one aspect of this disclosure, the flow control valve includes a valve element and a support element. The valve element is configured to deflect responsive to a change in pressure difference across the valve element. The support element cooperates with the valve element to present an effective flow-through area that changes as the valve element deflects. The amount of relative engagement between the valve element and the support element changes as the valve element deflects. External vibration causes the valve element to vibrate to reduce stiction or ice buildup.

Abstract: A PCV valve include a housing which internally has a valve chamber including an entrance at one end and an exit at the other end in an axial direction of the valve chamber. In the valve chamber, a valve element which is axially movable and a spring which urges the valve element toward the entrance are provided. An electric heater is provided in the housing. The valve element includes an end which is movable close to the entrance. The electric heater is arranged in such a manner as to surround the valve chamber from the exit to the end of the valve element closer to the entrance. The electric heater includes a cylindrical bobbin made of a high heat-conductive material and a coil wound on the outer periphery of the bobbin. The bobbin has an inner peripheral surface forming a large part of an inner peripheral surface of the valve chamber.

Abstract: An integrated positive crankcase ventilation (PCV) channel is formed along a structural weld line between two shell components that are welded together to form an air intake manifold. The integrated PCV channel can be used to uniformly distribute blow-by gases from the crankcase of an internal combustion engine to a plurality of combustion chambers via the air intake manifold.

Abstract: A blowby gas passage structure for returning a blowby gas leaking into a crankcase of an internal combustion engine to the internal combustion engine comprises: an intake passage which can be connected to the internal combustion engine for allowing the blowby gas to be returned to the internal combustion engine, and in which a throttle valve is disposed; a first passage for allowing the blowby gas to be introduced into the intake passage downstream from the throttle valve, the first passage including a joint portion connected to the intake passage; and a heating device provided in the joint portion of the first passage in such a manner as to be integral with the intake passage.

Abstract: An automobile fuel/oil separator including a plurality of gravel particles arranged between a pair of screens is connected with an automobile PCV valve for separating the crankcase oil from the fuel. Evaporative fuel from the fuel tank along with the separated fuel is fed to the fuel carburetor or fuel injector and the separated oil is returned to the oil reservoir.

Abstract: A PCV system includes heated PCV valve for metering a flow of crankcase gases therethrough and a heated inlet manifold fitting for receiving a flow of crankcase gases therethrough. The PCV valve and the heated inlet manifold fitting are in communication with a current source to apply current to heaters associated with each as required.

Abstract: A positive crankcase ventilation valve includes a flow restrictor movable in an orifice to vary flow of fumes from an engine crankcase to an intake manifold in a vehicle. The valve also includes a temperature-activated element for moving the flow restrictor in the orifice.

Abstract: A positive crankcase ventilation valve includes a flow restrictor movable in an orifice to vary flow of fumes from a crankcase to an intake manifold in a vehicle.

Abstract: An oil separator for use in a vehicle air system includes a recycling valve for removing coalesced oil. The recycling valve may include a piston movable in a cylinder in response to a control air pressure to open the recycling valve and thus drain coalesced oil from a sump under the influence of residual air pressure in the sump. The separator may include a fixture for mounting the separator to a vehicle, including a plurality of ports extending from an inlet port for directing air into the cartridge with a combined flow area at least equal to the flow area of the inlet port. The plurality of ports preferably extend at a right angle to the direction of flow of air through the inlet port. A safety relief valve on the separator releases air when the pressure exceeds a predetermined pressure.

Abstract: In order to suppress freezing of a water content within a breather tube, a heater (13) is arranged within a breather tube (11) joining a cylinder head cover (10) and an air cleaner (8). A main body of the breather tube (11) is constituted by a joint tube (18) arranged in a middle, and partial tubes (22, 23) connected to both ends thereof. The heater (13) has a heating element (14) corresponding to a heating element, and has a heater case (21) accommodating the heating element (14) in a state of being pinched by electrodes (15), and is arranged in a center portion of the joint 18. A slot (18a) for inserting the heater (13) is formed in the joint tube 18. A heat radiating body (20) extended along the breather tube (11) is joined to the heater case (21). An outer peripheral portion of the breather tube (11) is covered by an insulative outer tube (24).

Abstract: Known pressure regulating valves have a valve closing body, which cooperates with a valve seat, and a restoring spring, which acts on a valve closing body in the direction facing away from the valve seat. It is disadvantageous that the restoring spring is disposed in a pressure chamber, which has the valve seat and through which aggressive blowby gases flow out of the crankcase. The blowby gases for instance have a corrosive, etching effect on the material of the restoring spring, shortening the service life and lessening the spring force of the restoring spring. This has a highly adverse effect on the regulation of the pressure in the crankcase. In the pressure regulating valve of the invention, the service life of the restoring spring is increased. According to the invention, the restoring spring (31) is embodied as a tension spring and is located on the side of the valve closing body (15) facing away from the valve seat (12).

Abstract: A method and combustion system for reducing the formation of intake manifold deposits, such as including intake valve valves, and exhaust valve deposits in combustion engines by delivery of an organomolybdenum source from the vapor phase of an engine lubricant into a combustion chamber.

Abstract: A positive crankcase ventilation valve assembly is provided. The positive crankcase ventilation valve assembly includes a housing having a first end and a second end and a flow path therebetween. A positive crankcase ventilation valve is provided and positioned relative to the housing first end and in fluid communication with the housing flow path. A baffle is provided and positioned in the housing and in fluid communication with the housing flow path, wherein the baffle is arranged to allow crankcase gases to flow through the baffle and into the positive crankcase ventilation valve while preventing engine oil from traveling beyond the baffle.

Abstract: A valve for controlling a fluid flow, in particular for crankcase venting of an internal combustion engine, including a base body (37), a valve body (22) and a biasing means (23), the base body (37) having a valve side (45) and an opposite side (46) situated opposite the valve side (45), a part of the valve body (22) protruding through an opening (47) situated in the base body (37), the biasing means (28), in particular a compression spring, being arranged between the opposite side (46) of the base body (37) and the valve body (22) and supported against the opposite side of the base body (37).

Abstract: A positive crankcase ventilation valve includes a flow restrictor movable in an orifice to vary flow of fumes from a crankcase to an intake manifold in a vehicle. The valve also includes a wax motor for moving the flow restrictor in the orifice.

Abstract: In prior art engine breather systems, shut off valves that prevent oil from entering the engine induction system have been mounted externally on the engine and require associated external pipework. Both the shut off valve and pipework are prone to damage and leaking. The closed circuit breather apparatus of the present invention includes a cylinder head cover and a shut off valve provided beneath the cylinder head cover. The shut off valve includes an aperture in communication with a blow-by gas inlet passage and a valve float restrained to move between a first position in which the aperture is open and a second position in which the aperture is closed. Preferably the shut off valve is integral with the cylinder head cover. The shut off valve is thus packaged inside the engine valve chamber, making it easy to fit and eliminating leak paths.

Abstract: A flow control valve coupling structure that does not require complicated machining and facilitates the installation of a flow control valve. The coupling structure includes a fitting portion having a male thread that is formed on a peripheral surface of the flow control valve. A coupled member has a coupling hole to receive the flow control valve. A cylindrical elastic sealing member is engaged with the coupling hole to seal the space between the flow control valve and the coupling hole. The elastic sealing member has an inner surface defining a mounting hole in which the fitting portion is fitted. A female thread is formed on the inner surface and is mated with the male thread of the fitting portion.

Abstract: An oil separating apparatus for blow-by gas adapted to form a funnel shaped space in a cylinder head cover to prompt oil contained in the gas to be introduced to an oil line along an inner circumference of the space by way of centrifugal force, thereby inducing the blow-by gas, free of oil, towards a positive crankcase ventilation (PCV) valve.

Abstract: A breather device comprises a breather chamber (22) provided in a valve arm chamber (2) arranged above a cylinder head of an engine. In the breather chamber, blow-by gas including oil mist is separated into oil component and gas component, and the oil mist is removed from the blow-by gas. The interior of the breather chamber is alternately divided into plural horizontally juxtaposed rooms (22a, 22b, 22c) by a partition (23) extended from a bottom surface of the breather chamber and a partition (2a) extended from a ceiling surface of the breather chamber. Plural oil trap members (10) for trapping oil mist in the blow-by gas are arranged in the breather chamber. Especially, the oil trap member arranged at a blow-by gas inlet of the breather chamber is held by a holder (11) made separately from members (2, 7) forming the valve arm chamber (5).

Abstract: A PCV valve assembly including housing having a fluid inlet and outlet. A poppet valve is disposed in the housing between the fluid inlet and outlet and is moveable in an axial direction between a plurality of positions. A heating element having a positive temperature coefficient material is supported in the housing in proximity to at least a portion of the valve for automatically heating the valve in response to a given voltage. The material produces a first heat in response to a first temperature and the given voltage. The material produces a second heat less than the first heat produced in response to the given voltage and a second temperature greater than the first temperature. That is, the positive temperature coefficient material automatically regulates the flow of current and the temperature produced without the need of a thermostat in response to the same voltage.

Abstract: A positive crankcase ventilation valve for venting crankcase gases from a crankcase of an engine has a valve casing with an inlet adapted to communicate with the crankcase and an outlet adapted to communicate with an engine intake manifold for the flow of crankcase gases drawn from the crankcase through the valve casing by the engine manifold when the engine is running. A metering pintle reciprocates in the casing. A crossbar extends across the casing adjacent to the inlet. A spring presses the pintle against the crossbar when the engine is not running. The pintle is moved away from the crossbar against the pressure of the spring by the flow of the crankcase gases when the engine is running to meter the flow of the crankcase gases. The crossbar is a narrow roll pin so that if moisture between the roll pin and pintle freezes when the engine is not running, the frozen moisture will quickly break away when the engine is started.

Abstract: A valve assembly and method for controlling flow of gases through a passage between an engine crankcase and an engine intake manifold is provided. The method includes decreasing a flow of gases through the passage between the crankcase and the intake manifold when a temperature of the gases is greater than a predetermined temperature.

Abstract: Method and device (15) for pressure control in a combustion engine (1) with a crankcase (11) to which crankcase gases are guided during operation of the engine. The valve device (15) is adapted for detecting the current pressure in the crankcase (11) and for opening and closing, respectively, a connection (35) between the crankcase (11) and a suction pipe (9) of the engine depending on the detected pressure. The valve device (15) includes a first valve (19) which is adapted for assuming a condition between a first, opened position and a second, closed position depending on the detected pressure in the crankcase (11), and a second valve (20) which is adapted for assuming a condition between a first, opened position and a second, closed position depending on the condition of the first valve (19). The invention also relates to a method for such pressure control.

Abstract: A breather assembly for connection to a protected chamber for use in both positive and negative pressure environments, is described. The breather assembly has a central intake chamber that is protected from the ingress of water or contaminants. The breather assembly provides drain paths for any water or contaminants that may get into the inner chamber.

Abstract: The present invention relates to a crank case ventilation system for an internal combustion engine that has a two-stage air charge boosting system. An air inlet system supplies the engine with air that may be pressurised by an upstream supercharger and a downstream turbocharger in series. A crank case evacuation system draws crank case gasses from a crank case and introduces said gasses into the air inlet system, through either a first conduit or a second conduit, depending on the setting of a pressure-regulated control valve. The first conduit is used to introduce said gasses upstream of the first boost stage when this stage is operational, and when the first boost stage is not operational, the second conduit is used to introduce said gasses downstream of the first boost stage and upstream of the second boost stage.

Abstract: In prior art engine breather systems, shut off valves that prevent oil from entering the engine induction system have been mounted externally on the engine and require associated external pipework. Both the shut off valve and pipework are prone to damage and leaking. The closed circuit breather apparatus of the present invention includes a cylinder head cover and a shut off valve provided beneath the cylinder head cover. The shut off valve includes an aperture in communication with a blow-by gas inlet passage and a valve float restrained to move between a first position in which the aperture is open and a second position in which the aperture is closed. Preferably the shut off valve is integral with the cylinder head cover. The shut off valve is thus packaged inside the engine valve chamber, making it easy to fit and eliminating leak paths.

Abstract: A pressure control valve with a pressurized membrane (5) for closing and opening a gas passage (7) in which a valve chamber (8) pressurized with an ambient pressure (Pamb) is located on the side of membrane (5) that is opposite the gas passage (7) to be closed and opened. The pressure control valve (1) is arranged in such a way that the exit of the gas passage (7) leads directly into a volume with ambient pressure (Pamb). The membrane (5) includes a ventilation hole (9) through which the valve chamber (8) is directly pressurized with ambient pressure (Pamb).

Abstract: A breather device of a vehicle engine is arranged so as to shut off an engine intake system from heat of an engine exhaust system and to make effective use of dead space for location. The breather device includes a breather tank arranged independently between the engine intake system and the engine exhaust system on the rear side of a cylinder assembly of the engine above a crankcase thereof; and a plurality of breather pipes connecting the breather tank to the engine and the engine intake system.

Abstract: A fuel pump module (10) includes a fuel reservoir (R), fuel pump (26), manifold (32) connected to a pump outlet (30), a fuel line (FS) for supplying fuel to an engine (E), and a return line (FR) returning unconsumed fuel to the reservoir through a return valve (100). An external jet manifold (20) includes a nozzle (68) through which fuel is directed from the manifold, and a venturi (70) by which a low pressure region is created to draw fuel from a fuel tank (T) into the jet manifold where it is entrained and intermixed with other fuel and discharged into the reservoir. The return valve includes a plunger (122) biased to close the return valve when the fuel pump is shut off. High pressure fuel from the fuel pump acts on the plunger when the engine is running to open the valve.

Abstract: A pressure-regulating valve particularly useful in a diesel internal combustion engine with a closed crankcase is provided. The valve includes a body coupled to a bonnet with an internal movable piston. The movable piston maintains a substantially constant pressure in the crankcase by adjusting a fluid flow in response to changes in pressure. The movable piston also includes an integral relief valve to prevent overpressure in the event of a crankcase pressure in excess of the designed limits of the pressure-regulating valve.

Abstract: An engine breather system is formed from a first breather chamber communicating with a crank chamber formed within a crankcase, a second breather chamber communicating with the crank chamber as well as with an intake system, a communicating passage connecting the first and second breather chambers, and a one-way valve. The valve is provided at an open end on the second breather chamber side of the communicating passage, so as to prevent breather gas from flowing from the second breather chamber toward the first breather chamber. The one-way valve is provided with a pressure relief hole, which prevents oil from leaking into the intake system accompanying continued operation of the engine in an attitude different from its normal attitude.

Abstract: A valve assembly and method for controlling flow of gases through a passage between an engine crankcase and an engine intake manifold is provided. The method includes increasing a flow of gases through the passage between the crankcase and the intake manifold when a temperature of the gases is below a predetermined temperature.

Abstract: Joint portions to which tubes are coupled are provided with a pair of connector portions which are engaged/disengaged in accordance with the engagement/disengagement of the joint portions. Further, a detection circuit is provided which detects the non-conduction state between terminals provided at the connection portions. The detection circuit is arranged to output an alarm signal when the state between the terminal metal members is non-conductive. Thus, when one of the joint portions disengages, the corresponding one of the connector portions also disengages, so that the state between the terminal metal members becomes non-conductive and the alarm signal is generated.

Abstract: A PCV valve is incorporated in the interior of a centrifugal oil mist separator which is provided integrally on a head cover of an engine. The centrifugal oil mist separator comprises an upstream-side separation chamber including a blow-by gas inlet port and a downstream-side separation chamber to which a blow-by gas outlet port and an oil discharge hole open, and an oil separation plate is disposed such that a communication between the blow-by gas inlet port and the blow-by gas outlet port is cut off. The oil separator plat is provided at a distal end of a protruding portion which integrally extends from a valve seat of the PCV valve, the protruding portion and the oil separation plate functioning to intensify a swirl flow in the upstream-side separation chamber.

Abstract: In accordance with the teachings of the present invention, an off gas emission engine intake system is provided which uses engine cooling fluid to deliver warm emission gasses to the engine. The heater provides an outer body which has a channel therethrough. The channel is defined by an annular inner surface. An emission intake tube is disposed through the channel defining a toroidal chamber between the inner surface and air intake tube. The outer body further defines a pair of opposed orifices which accept coolant into the toroidal chamber. The system further has a lower extension tube which journally accepts the emission intake tube. A cylindrical chamber, coupled to the toroidal chamber, to further increase the contact area between the intake fluid.

Abstract: A pressure-regulating valve particularly useful in a diesel internal combustion engine with a closed crankcase is provided. The valve includes a body coupled to a bonnet with an internal movable piston. The movable piston maintains a substantially constant pressure in the crankcase by adjusting a fluid flow in response to changes in pressure. The movable piston also includes an integral relief valve to prevent overpressure in the event of a crankcase pressure in excess of the designed limits of the pressure-regulating valve.

Abstract: A heated PCV valve (30) includes a valve body (80) for metering a flow of crankcase gases therethrough. The valve body (80) has an intermediate portion (82) with a heating element (50) integrally disposed therein for heating the crankcase gases.

Abstract: An intake manifold for an engine is provided that includes a housing having a passageway carrying blow-by gases from an engine crankcase. A valve body housing having a cavity is defined by a portion of the housing. The valve body housing has a vacuum side and a blow-by gas side. The blow-by gas side is in fluid communication with the passageway. A positive crankcase ventilation valve is disposed within the cavity and permits the blow-by gases to flow from the passageway through to the vacuum side when in an open position. A cap is preferably secured to the housing for sealing the positive crankcase ventilation valve within the cavity. Preferably an oil separator is also integrated into the intake manifold to separate the oil from the blow-by gases.