Abstract: A gas-liquid rotating coalescer includes first and second sets of one or more detent surfaces on a rotary drive member and a driven annular rotating coalescing filter element which engagingly interact in interlocking mating keyed relation to effect rotation of the coalescing filter element by the rotary drive member. Designated operation of the coalescer requires that the coalescing filter element include the second set of detent surfaces. A coalescing filter element missing the second set of detent surfaces will not effect the noted designated operation.

Abstract: An internal combustion engine is disclosed which includes an improved crankcase drain back system. A set of drain flow diodes are disposed in each of the drain lines to direct fluid flow in a direction from the head portion to the crankcase. Likewise, a set of breather flow diodes are disposed in the breather lines to direct fluid flow in a second direction from the cylinder portion to the head portion. The flow diodes include a series of stacked flow diode elements which allow flow in one direction, while resisting flow in the opposite direction.

Abstract: A vehicle system comprises an internal combustion engine including a PCV system fluidly coupled to a gaseous fuel source via a flow control valve. The gaseous fuel source may be fluidly coupled to an air inflow line of the PCV system, and the flow control valve may be configured to control a flow of gaseous fuel into the PCV system.

Abstract: A crankshaft structure for a model engine contains a body and at least one fin member. The body is formed in an elongated shaft shape and includes a cam disc disposed on a distal end thereof and a connecting shaft extending outwardly from an end surface of the cam disc, a window defined on a middle section thereof, and a channel formed therein and passing through the end surface of the cam disc so as to inhale and exhaust mixed oil gas. The at least one fin member is mounted at a position of the channel where corresponds to the window.

Abstract: A combustion engine, in particular that of a motor vehicle, includes a ventilation device for feeding gases of a crankcase of the combustion engine enclosing at least one crankshaft to an air feed of the combustion engine, wherein the air feed feeds an airflow rate to the combustion engine. An adapter device may fluidically connect a full load path of the ventilation device to a full load line of the ventilation device and a part load path of the ventilation device to a part load line of the ventilation device.

Abstract: A ventilation control apparatus for a supercharged internal combustion engine that can perform crankcase ventilation favorably. A system includes a supercharging system, an EGR mechanism, and a blow-by gas reflux mechanism. The EGR mechanism includes an ejector between an EGR valve and an EGR cooler. A suction port is connected to a cylinder head cover via a PCV passage. A nozzle portion is connected to an EGR passage on the EGR cooler side. A diffuser portion is connected to the EGR passage on the EGR valve side. By making EGR gas flow through the EGR passage, gas in the crankcase can be drawn through the PCV passage to thereby be burned, together with the EGR gas or fresh air, in an engine.

Abstract: A positive crankcase ventilation system for an internal combustion engine (ICE) includes an engine crankcase, an intake manifold disposed in downstream gas flow communication with the engine crankcase, an air induction system disposed in upstream gas flow communication with the engine crankcase, and a vacuum pump disposed in gas flow communication between the air induction system and the engine crankcase. Operation of the vacuum pump facilitates air flow from the air induction system to the engine crankcase, and from the engine crankcase to the intake manifold.

Abstract: An engine system is provided. The engine system includes an intake conduit positioned upstream of an engine cylinder and also includes a PCV outlet opening into the intake conduit. The engine system further includes a condensate bypass duct in parallel fluidic communication with and vertically below the intake conduit, the condensate bypass duct including a duct inlet opening into the intake conduit and a duct outlet opening into the intake conduit.

Abstract: An engine includes: a first part that is provided in a first passage that interconnects an inside of a crankcase and a part of an intake passage at a downstream side of an adjustment part adjusting an intake air amount and changes gas flow in the first passage; and a second part that is provided in a second passage that interconnects the inside of the crankcase and a part of the intake passage located at an upstream side of the adjustment part and changes gas flow in the second passage. If an engine temperature is higher than a given value, and the degree of fuel decreasing correction exceeds a given value, the first part decreases the gas flow rate through the first passage and the second part restricts a flow direction in the second passage to a direction in which gas flows to the crankcase from the intake passage.

Abstract: A PCV valve apparatus includes a PCV valve main body and a cover member. The PCV valve main body includes a first connection portion, a second connection portion, and a fastened portion. The first connection portion includes a first end and a second end. The cover member includes an attachment portion and a covering portion. The fastened portion includes a locking portion protruding toward the cover member in a state where the covering portion covers a fastening member. In a covering position where the covering portion covers the fastening member, the locking portion is received in a receiving portion, and the attachment portion is located at the second end. In a non-covering position where the covering portion does not cover the fastening member, the attachment portion is in contact with the locking portion to be locked by the locking portion and is located at the first end.

Abstract: A vehicle may include an internal combustion engine having a crankcase and a crankcase ventilation device. The crankcase ventilation device may have at least one oil separating device and an oil return that feeds separated oil back to the crankcase. The vehicle may include a conveying device for driving a fluid other than blow-by gas. The conveying device may also drive the blow-by gas in the crankcase ventilation device.

Abstract: A dual flow check valve includes a valve body having an inner valve cavity, a first valve opening, and a second valve opening. The dual flow check valve further includes a seal disposed within the valve body. The seal is operatively coupled within the valve body such that the seal is configured to move relative to the valve body between an open position, in which the seal allows the gas to flow between the first and second valve openings through the inner valve cavity, and a closed position, in which the seal inhibits the gas and the liquid from flowing through the inner valve cavity from the first valve opening to the second valve opening.

Abstract: An engine includes an engine block that defines a drain-back passage and a Positive Crankcase Ventilation (PCV) passage. The drain-back passage and the PCV passage are disposed in fluid communication with each other. A cylinder head is attached to the engine block. The cylinder head defines an oil return passage. The oil return passage is disposed in fluid communication with both the drain-back passage and the PCV passage. A head gasket is disposed between the engine block and the cylinder head, and includes a shelf that extends at least partially over the PCV passage to prevent liquids draining through the oil return passage into the drain-back passage, from entering the PCV passage, while allowing gasses flowing through the oil return passage to enter the PCV passage.

Abstract: A ventilation system for an engine is disclosed. The ventilation system may include a first conduit configured to connect an exhaust system of the engine with a crankcase of the engine, a second conduit configured to connect to a vent of the crankcase, and a valve disposed within the second conduit. Additionally, the ventilation system may include a sensor configured to generate a signal indicative of a concentration of a gaseous constituent within the crankcase of the engine, and a controller in communication with the valve and the sensor, the controller being configured to selectively move the valve based on the signal.

Abstract: A positive crankcase ventilation (PCV) system is provided herein. The PCV system includes an engine assembly, the engine assembly including an engine block, a cylinder head, a valve cover, and an intake manifold and a PCV passage providing fluidic communication between a crankcase of the engine assembly and a cylinder intake port of the engine assembly without hoses or conduits external to the engine assembly.

Abstract: A compressor housing includes a housing body for enclosing an impeller, an inlet portion for introducing air toward the impeller, and a port portion arranged adjacent to the inlet portion. A valve body for opening and closing a bypass passage, which bypasses the impeller, can be rested against the port portion. A connection hole, to which a return passage for returning blow-by gas of an internal combustion engine is connected, is formed in a side wall of the inlet portion. The inlet portion and the port portion have a common wall. A communication hole, which configures a part of the return passage, is formed in the common wall. The communication hole is formed such that the projection plane defined by projecting the communication hole onto a surface of the side wall having the connection hole along the axis of the communication hole is contained in the connection hole.

Abstract: In detection of a temperature of fresh air which is supplied to an intake manifold of an engine, by a fresh air temperature sensor, the invention aims at preventing precision of an engine control from dropping due to difference in an attached position of the fresh air temperature sensor. The engine device has an intake pipe for supplying fresh air to the intake manifold, a breather chamber for separating lubricating oil, the breather chamber being arranged within a head cover covering an upper surface side of a cylinder head, and a blow-by gas return pipe. The intake pipe and the breather chamber are connected via the blow-by gas return pipe. The fresh air temperature sensor detecting a temperature of the fresh air introduced into the intake pipe is attached to the intake pipe.

Abstract: A separator for separating contaminants from a fluid stream has first and second chambers coupled by an aperture through which fluid can pass. An actuator can adjust the crossectional area of the aperture according to a pressure differential between the first chamber and a pressure reference. An impaction surface can deflect the first fluid stream after it enters the second chamber such that contaminants are separated from the stream. A pump generates a pressure differential across the aperture. It includes a third chamber having a second inlet for receiving a second fluid stream into the third chamber. The second inlet includes a convergent nozzle for accelerating the second fluid stream, and a third inlet for receiving the first fluid stream downstream of the impaction surface, the third inlet being arranged relative to the second inlet such that the second fluid stream can entrain and accelerate the first fluid stream.

Abstract: An engine apparatus that utilizes a gas pressure regulation valve not only for pressure adjustment but also for removal of lubricant. An engine apparatus includes a blow-by gas returning device to return a leakage of blow-by gas from a combustion chamber to an intake system. The engine apparatus includes an expansion chamber, into which the blow-by gas is introduced from the gas pressure regulation valve. In the expansion chamber, lubricant contained in the blow-by gas is isolated. The blow-by gas is returned to an intake side of an engine from the expansion chamber.

Abstract: A reflux structure for blow-by gas that returns blow-by gas generated in an engine to a clean side of an air cleaner to reflux the blow-by gas to the engine, the reflux structure for blow-by gas includes: a communication pipe that has a flow path introducing the blow-by gas from the engine to the clean side of the air cleaner; and an air funnel that is mounted on the clean side of the air cleaner and introduces intake air from a dirty side into the engine, wherein the communication pipe has a discharge port formed to discharge the blow-by gas to a side closer to a bottom than to an umbrella part of the air funnel around the air funnel.

Abstract: An engine assembly includes a two-cylinder engine, an intake assembly, and an air-oil separator. The two-cylinder engine defines a first cylinder bore, a first combustion chamber, a second cylinder bore, a second combustion chamber, and a crankcase volume. The engine further includes a first piston disposed within the first cylinder bore, and a second piston disposed within the second cylinder bore. The intake assembly includes an intake manifold in fluid communication with each of the first and second combustion chambers, and the air-oil separator defines a separator volume and in fluid communication with each of the crankcase volume and the intake manifold. A reciprocal, synchronous motion of the first and second pistons is operative to exhale gas from the crankcase volume through the separator volume and into the intake manifold.

Abstract: If the pressure of the section of the air intake path downstream of a compressor wheel becomes higher than the pressure of the section on the upstream side, a flow of air is produced in a bypass pipe and an ejector draws in blow-by gas from within a first gas pipe. The blow-by gas sucked into the ejector from the first gas pipe flows into the section of the air intake path upstream of the compressor wheel by way of the bypass pipe. The blow-by gas recirculation device has a structure in which the section of at least the bypass pipe or the first gas pipe that connects to the other components separates at the same time the other piping located in the vicinity of the internal combustion engine separates. The other piping is piping that will affect a monitorable engine operation state when separated.

Abstract: An oil drain structure for an oil mist separator including a drain pipe extending from the oil mist separator into the internal combustion engine, the drain pipe having an oil discharge hole extending through a lower end portion of the drain pipe along an axial direction of the drain pipe, and a check valve including a valve body disposed below the lower end portion of the drain pipe, the valve body acting to open and close the oil discharge hole from a side of a lower surface of the lower end portion of the drain pipe, a valve head portion fitted into the drain pipe with a fine clearance as an orifice and being moveable in the axial direction of the drain pipe, and a stem portion extending through the oil discharge hole to connect the valve body and the valve head portion with each other.

Abstract: The present invention relates to a device for venting a crank space in an internal combustion engine (1) having a suction device (5) for sucking out blow-by gases from the crank space (3) and having a venting line (4) which leads from the crank space (3) to the suction device (5) and in the course of which a throttle device (6) or a pressure regulating element (7) is arranged in order to bound a partial pressure which is generated by the suction device (5) in the crank space (3). It is essential to the invention here that an oil mist separator (8) which is embodied as an impactor is integrated into the throttle device (6) or into the pressure regulating element (7).

Abstract: A method and system is provided for regenerating and cleaning an air-oil coalescer of a crankcase ventilation system of an internal combustion engine generating blowby gas in a crankcase. The coalescer coalesces oil from the blowby gas. The method and system includes regenerating and cleaning the coalescer by intermittent rotation thereof.

Abstract: An engine assembly includes an engine block at least partially defining a combustion chamber and a crankcase volume. The engine block defines an opening in fluid communication with the crankcase volume. An air-oil separator is mounted to the engine block at the opening and is configured to separate oil from blowby gasses flowing from the crankcase volume through the air-oil separator. A method of venting an engine crankcase volume is also included.

Abstract: Systems and methods for ventilating engine crankcase gases are described. In one example, crankcase gases flow from a first cylinder bank to a second cylinder bank via tubes placed between exhaust gas manifold runners. The systems and method may improve crankcase gas ventilation.

Abstract: An engine gas-oil separator for separating oil contents in blow-by gases that are recirculated into an intake system includes a head cover, a lower plate, and a plurality of baffles. The lower plate attaches to the head cover to define a separation chamber between an upper internal surface of the head cover and a lower internal surface of the lower plate. The separation chamber includes a blow-by gas inlet, a blow-by gas outlet and at least one oil outlet. The plurality of baffles are disposed in the separation chamber between the head cover and the lower plate. The plurality of baffles, the upper internal surface and the lower internal surface define a swirling flow path through the separation chamber in a longitudinal direction between the blow-by gas inlet and the blow-by gas outlet. The plurality of baffles are also configured to direct the blow-by gases in a generally transverse direction.

Abstract: In an internal combustion engine (10), oil in an oil pan (21) is pressure-fed to lubrication sites through operation of an oil pump (22). After being used for lubrication of the lubrication sites, the oil runs down and collects in the oil pan (21). The internal combustion engine (10) is provided with a blow-by gas process device (40) including a communication passageway (48) that connects a portion of the intake passageway (12) on the downstream side of the throttle valve (13) in the intake flow direction and an interior of the crankcase (15) in communication. A pressure chamber (47) to which an end portion of the communication passageway (48) is open is defined in the interior of the crankcase (15). Oil scattered in the interior of the crankcase (15) is introduced into an interior of the pressure chamber (47) before mixing with the oil collected in the oil pan (21).

Abstract: Systems and methods for providing vacuum to one or more of a crankcase ventilation system, an emission control system, and an exhaust gas recirculation (EGR) system included in a turbocharged engine system are provided. In one example, approach, a method comprises drawing vacuum from a vacuum source located in an intake of the engine downstream of a pre-compressor throttle and upstream of an intake throttle, and applying the drawn vacuum to a discharge outlet of a uni-directional crankcase ventilation system, where an inlet of the crankcase ventilation system is coupled to the intake of the engine upstream of the pre-compressor throttle.

Abstract: The inside in an engine case is sucked to turn a pressure in the engine case into a negative pressure. A breather chamber is disposed above a vacuum pump. An intake port of a blow-by gas is disposed in an upper portion of the vacuum pump. A discharge port of the blow-by gas is disposed in a lower portion of the vacuum pump.

Abstract: A blow-by gas refluxing device is provided for an engine system including an engine and an intake air passage communicating with the engine for supplying intake air into the engine. The blow-by gas refluxing device includes a plurality of blow-by gas refluxing passages each having an inlet communicating with the engine and an outlet communicating with the intake air passage. The outlets of the blow-by gas passages communicate with the intake air passage at different positions along the length of the intake air passage and each of the blow-by gas passages has a backflow preventing device disposed therein, so that blow-by gas produced in the engine can flow into the intake air passage via at least one of the blow-by gas refluxing passages throughout the entire operational range of the engine.

Abstract: A breather structure is for an engine of a vehicle provided with a V-belt type continuously variable transmission. The engine includes a crankcase having a crank chamber and a gear transmission chamber, and a V-belt transmission case housing the V-belt type continuously variable transmission, the V-belt transmission case being fastened to an attachment surface on one side of the crankcase in the crankshaft direction. A breather chamber is formed in a mating part between the attachment surface of the crankcase and an attached surface of the V-belt transmission case. This breather chamber separates the air containing oil mist in the crankcase into a gas component and an oil component, discharges the gas component to the exterior of the crankcase, and returns the oil component to the interior of the transmission chamber.

Abstract: A crankcase ventilation system for an internal combustion engine having a cylinder block that at least partially defines at least one cylinder includes a valve cover configured to be mounted on an individual cylinder head corresponding to an individual cylinder and form a cavity therein. Further a crankcase ventilation opening associated with the valve cover. A crankcase breather incorporated into the valve cover. The crankcase breather includes a breather body, an inlet portion in fluid communication with the cavity of the valve cover, and an outlet portion aligning with the crankcase ventilation opening of the valve cover.

Abstract: An engine assembly includes an engine defining a combustion chamber and a crankcase volume, together with an intake assembly. The intake assembly includes an air cleaner assembly, a throttle, and an intake manifold in a series arrangement and fluidly coupled with the combustion chamber. An air-oil separator is fluidly coupled between the crankcase volume and the intake manifold and defines a separator volume configured to extract oil from air flowing through the volume. The air-oil separator includes a first inlet port configured to direct a first air flow into the separator volume substantially along a first direction, and a second inlet port configured to direct a second air flow into the volume substantially along a second direction that generally opposes the first direction.

Abstract: A PCV system for an internal combustion engine that can suppress occurrence of preignition due to oil inflow into a cylinder is provided. A path switching valve is controlled so that blowby gas flows via a bypass passage, in a preig occurrence region. Thereby, path pressure loss increases, a PCV flow rate is decreased, and blowby gas can be passed through a separator with a high collection efficiency. As a result, an oil takeaway amount can be reduced, and occurrence of preignition due to cylinder oil inflow can be suppressed.

Abstract: Methods for removal of condensed, blow-by contaminants with small molecular dimensions from the circulating lubricating engine oil of internal combustion engines, including automotive engines, with a positive crankcase ventilation system are disclosed. An adsorbent macroporous structure comprising alumino-silicate particles with micro-pores is at least partially immersed in the circulating oil. The micro-pores are sized to adsorb the small, condensed, blow-by, contaminant molecules but not the larger oil molecules. At low temperatures the contaminant molecules may be adsorbed and temporarily stored in the micropores. At higher temperatures some of the contaminants may desorb and be re-incorporated in the oil. The desorbed contaminants will circulate with the higher temperature oil into the engine crankcase where they may vaporize and be removed by the engine positive crankcase ventilation system.

Abstract: A positive crankcase ventilation system for an internal combustion engine (ICE) includes an engine crankcase, an intake manifold disposed in downstream gas flow communication with the engine crankcase, an air induction system disposed in upstream gas flow communication with the engine crankcase, and a vacuum pump disposed in gas flow communication between the air induction system and the engine crankcase. Operation of the vacuum pump facilitates air flow from the air induction system to the engine crankcase, and from the engine crankcase to the intake manifold.

Abstract: An oil baffle, a system, and a method are disclosed for separating a gaseous component from oil in a blow-by vapor for an internal combustion engine. An example system may include a cam cover configured to be mounted on a cylinder head. The system may also include an oil baffle that may have a generally planar body with a first face and a second face opposite the first face. The first face may be coupled to the cam cover and may define an oil separation chamber between the cam cover and the first face. The oil baffle may include one or more stiffening members coupled to and extending from and substantially normal to the second face.

Abstract: A blow-by gas refluxing device is provided for an engine system including an engine and an intake air passage communicating with the engine for supplying intake air into the engine. The blow-by gas refluxing device includes a plurality of blow-by gas refluxing passages each having an inlet communicating with the engine and an outlet communicating with the intake air passage. The outlets of the blow-by gas passages communicate with the intake air passage at different positions along the length of the intake air passage and each of the blow-by gas passages has a backflow preventing device disposed therein, so that blow-by gas produced in the engine can flow into the intake air passage via at least one of the blow-by gas refluxing passages throughout the entire operational range of the engine.

Abstract: A closed crankcase ventilation system for an internal combustion engine includes a return duct with a variably controlled air-oil coalescer. In a turbocharger version, cleaned separated air is provided to the turbocharger inlet, and the coalescer is variably controlled according to a given condition of the turbocharger and/or the engine and/or the coalescer.

Abstract: A system and method for improving processing of gases contained within the crankcase of an internal combustion engine is presented. The system is especially suited for single boiling point fuels because it allows the storage of such fuels until the fuel can be opportunistically combusted.

Abstract: An internal combustion engine crankcase ventilation rotating coalescer includes an annular rotating coalescing filter element, an inlet port supplying blowby gas from the crankcase to the hollow interior of the annular rotating coalescing filter element, and an outlet port delivering cleaned separated air from the exterior of the rotating element. The direction of blowby gas is inside-out, radially outwardly from the hollow interior to the exterior.

Abstract: The invention provides a blow-by gas recirculating apparatus for a crankcase with enhanced ventilation efficiency. A fresh air introducing chamber is remote from a head cover. An upstream intake passage of a throttle valve is communicated with the fresh air introducing chamber, and the fresh air introducing chamber is communicated with a crankcase through a crankcase communication throttle hole which is opened in the crankcase. Fresh air in the upstream intake passage of the throttle valve is introduced into the crankcase sequentially through a fresh air introducing passage, the fresh air introducing chamber, and the throttle hole, without being short-circuited to a PCV valve. In a reverse flow from the crankcase to the upstream intake passage of the throttle valve, a gas in the crankcase reversely flows into the upstream intake passage sequentially through the throttle hole, the fresh air introducing chamber, and the fresh air introducing passage.

Abstract: In an oil separator provided in a cylinder head cover of an internal combustion engine and equipped with a partition wall disposed between a blow-by gas inlet and a blow-by gas outlet and having through holes each serving as an orifice for increasing a flow velocity of blow-by gas flow, a collision plate is arranged adjacent to the partition wall so as to be opposed to each of the through holes, for separating oil mist from blow-by gases. At least one upstanding wall is disposed downstream of the collision plate in a manner so as to be adjacent to an opening defined between a lower end of the collision plate and the bottom face of a separator chamber, for recapturing oil mist, once-separated from the blow-by gases but rescattering along with the blow-by gas flow passing through the opening of the collision plate.

Abstract: A crankcase ventilation for an internal combustion engine with a ventilation conduit which connects the crankcase of the internal combustion engine to an intake duct of the internal combustion engine, as well as a tank ventilation conduit and a connection system for a fluid conduit.

Abstract: An engine intake system is provided with a controller for calculating an idling intake air quantity on the basis of an air flow rate measured by an airflow meter and determining disconnection of a blow-by gas return tube in a case where a value obtained by subtracting the idling intake air quantity from a stored normal intake air quantity exceeds a threshold.

Abstract: A ventilation apparatus for an engine is provided with a recirculation passage for causing blow-by gas in a crank case to flow back into an intake passage of an engine. The ventilation apparatus is also provided with an oil return passage for returning oil to an oil pan. In the oil return passage, a common portion is formed, which is an internal space shared with the recirculation passage and into which oil falls under its own weight. Specifically, the portion of the oil return passage including the common portion extends in the vertical direction.

Abstract: An air cleaner structure for a vehicle includes an air cleaner is mounted on a power unit. The air cleaner case is formed in a shape elongated from a side of the internal combustion engine toward a side of the rear wheel. An intake-air outlet passage connected to an upstream end of a connecting tube is formed forward in the front of the air cleaner case. A filter member is placed rearward of the intake-air outlet passage in the case. A blowby gas return passage connected to a blowby gas return pipe of the engine, and an additional air passage are juxtaposed with each other in a vertical direction and formed forward around the intake-air outlet passage in front of the air cleaner case such that the blowby gas return passage is located below the additional air passage. The resulting structure reduces a length of piping to the engine.

Abstract: An oil filter system for a vehicle may provided at a cylinder block of an engine for collecting engine oil from a blow-by gas generated in a crank case. The oil filter system may include a blow-by path to recirculate the blow-by gas so that the blow-by gas generated in the crank case is combusted together with a fuel-air mixture, a filter case that is a space formed between the crank case and the blow-by path, a filter partition disposed to divide the filter case into two spaces, and configured to collect the engine oil contained in the blow-by gas, and an oil pan mounted in the cylinder block for collecting the engine oil that have been collected by the filter partition. The filter partition may collect the engine oil in a forward direction flow and a reverse direction flow of the blow-by gas.