Abstract: An engine assembly may include an engine structure, an intake assembly and a cylinder head cover assembly. The engine structure may define a combustion chamber and a crankcase in communication with a fresh air supply. The intake assembly may be in communication with the combustion chamber. The cylinder head cover assembly may be fixed to the engine structure and may include a cover member defining a positive crankcase ventilation chamber and a separator coupled to the cover member. The separator may define an inlet providing communication between the crankcase and the positive crankcase ventilation chamber. The cylinder head cover assembly may include a first outlet flow path in communication with the intake assembly and a second outlet flow path in communication with the intake assembly. A first valve may be located in the first outlet flow path.

Abstract: Systems and methods for an engine are described. In one example, a system may include a variable venturi coupled in an intake of the engine; an exhaust gas recirculation system having an exhaust gas recirculation flow path, the exhaust gas recirculation flow path coupled to the variable venturi; and a vacuum-utilizing device or system coupled to the variable venturi. In another example, a method may include coordinating adjustment of an exhaust gas recirculation valve coupled to the exhaust gas recirculation system, a fuel vapor purging valve coupled to the fuel vapor purging system, and the variable venturi in response to operating conditions.

Abstract: The invention relates to an internal combustion engine having an intake air line, which contains both a compressor of an exhaust gas turbocharger and a throttle flap, as well as having a tank ventilation system and a crankcase ventilation system, both of which are connected to the intake air line at two connecting points upstream of the compressor and behind the throttle flap. In order to make it possible to monitor the inlet points of the ventilation gases into the intake air line in a relatively simple way, the invention proposes that a non-return valve be mounted directly at each of the connecting points.

Abstract: An engine assembly includes a vapor canister in selective fluid communication with a crankcase to store alcohol vapor when the temperature inside the crankcase causes alcohol accumulated in the crankcase to boil. The vapor canister is in selective fluid communication with an air induction system to recirculate the alcohol vapor through the engine in a metered fashion.

Abstract: A breather system functions, during cold operation, as an open breather system, and functions as a closed breather system once the engine has sufficiently warmed. The breather system includes a first flow path between the engine crankcase and an air intake for the engine, and a three-way valve located within the flow path and responsive to ambient temperature and engine coolant temperature to close the conduit and to open a second flow path between the engine compartment and atmosphere.

Abstract: A vertical type engine includes: an engine body having a crank chamber and a cylinder bore; and a timing transmission chamber provided above the engine body and housing a timing transmission device that connects between a crankshaft and a cam shaft which are vertically placed, respectively, wherein a generator driven by the crankshaft is placed above the timing transmission device, and a breather chamber communicating with the crank chamber and an intake silencer box is provided between the generator and the crank chamber placed below the generator on the side opposite from the cam shaft with respect to the crankshaft. Hence, a vertical type engine that includes a breather chamber dedicated for gas-liquid separation and is compact can be achieved.

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: It is an object of the invention to provide a blow-by gas recirculating apparatus for an engine in which the ventilation efficiency of a crankcase can be enhanced.

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 is 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: Systems and methods for an engine are described. In one example, a system may include a variable venturi coupled in an intake of the engine; an exhaust gas recirculation system having an exhaust gas recirculation flow path, the exhaust gas recirculation flow path coupled to the variable venturi; and a vacuum-utilizing device or system coupled to the variable venturi. In another example, a method may include coordinating adjustment of an exhaust gas recirculation valve coupled to the exhaust gas recirculation system, a fuel vapor purging valve coupled to the fuel vapor purging system, and the variable venturi in response to operating conditions.

Abstract: A method of selectively directing a flow of blow-by gas (F) in a vehicle having an engine (14) and a turbocharger compressor (32) includes the steps of providing fluid communication for the flow of blow-by gas from the engine to a valve (12), actuating the valve with a valve actuator (38) to at least one of a closed system position and an open system position, and selectively directing the flow of blow-by gas from the valve to at least one of the turbocharger compressor and an atmosphere (28).

Abstract: An engine has a PCV passage connected to an intake system for recirculating a blow-by gas to the intake system and an air flow meter provided upstream of a connection between the PCV passage and the intake system in the intake system for sensing an intake air flow rate. An electronic control unit (ECU) performing various types of control of the engine diagnoses a clogging abnormality of the PCV passage based on pulsation width of the intake air flow rate sensed with the air flow meter. A thermal type sensor having a heating section and a temperature sensing section provided on a semiconductor substrate is used as the air flow meter.

Abstract: An engine with an exhaust pathway air injection system includes a combustion chamber having an exhaust port and a crankcase having an opening formed in the crankcase. The opening is designed to allow pressure pulses from within the crankcase to be received through the opening. The engine also includes an air pump having an inlet, an outlet, and a pumping mechanism. The air pump is attached to the opening formed in the crankcase. Pressure pulses power the pumping mechanism. Additionally the engine includes a manifold attaching the exhaust port and the pump outlet.

Abstract: This invention is to provide a fuel-air separation structure improvement for engine blow-by, which features an extra oil recirculation tube set up in between the bottom of the fuel-air separator and the engine, where the flow connection of the oil recirculation tube is controlled by a check valve, and the direction of the check valve is enabled only in a unidirectional way, pointing from the fuel-air separator to the crankcase of the engine, whereas the reverse direction is being cut off. By means of the aforementioned structure, the problems of carbon deposits in engine and exhaust pollution due to an excess of oil along with blow-by in the fuel-air separator can thus be substantially improved.

Abstract: A gasket for an internal combustion engine comprises a sheet portion and a PCV impaction surface formed in the sheet portion. The PCV impaction surface is configured to extend across, and partially close, a crankcase ventilation system passage. A plurality of apertures extend through the PCV impaction surface and are configured to allow crankcase gas to flow freely in the crankcase ventilation system passage while the PCV impaction surface is configured to separate oil droplets from the crankcase gas by impaction of the droplets with the surface.

Abstract: An oil separator arrangement for an internal combustion engine incorporates a vortex chamber oil separator with a vortex chamber extending in a longitudinal direction, where the vortex chamber includes a wall extending in a longitudinal direction, a gas inlet, and a gas outlet opening. The gas inlet is disposed tangential to the wall for tangentially blowing-in of blow-by-gas into the vortex chamber, so that at least one gas vortex flow rotating helically along the wall in the longitudinal direction is generated, where at least one further oil separator is connected in parallel to the vortex chamber oil separator. The further oil separator incorporates a separation chamber with an inlet-side spring tongue automatically controlled by the applied blow-by-gas, and a baffle wall disposed downstream the spring tongue.

Abstract: An evaporative emissions system may include a first passage selectively providing fluid communication between a fuel vapor region of a vehicle fuel reservoir and an engine air intake system, a second passage in fluid communication with the fuel vapor region and ambient air, and a filter assembly. The filter assembly may be impermeable to at least one of oxygen and hydrocarbons and may be located in the second passage between the fuel vapor region and ambient air. The filter assembly may prevent the at least one of oxygen and hydrocarbons from traveling between the fuel vapor region and ambient air.

Abstract: An improved air/oil separating PCV apparatus is disclosed that provides for integration of an air duct, cross-over duct, one way drain valve, PCV valve, cyclonic oil mist separator assembly, cyclone bypass valve, oil reservoir and oil fill cap into a single injection molded apparatus. The improved air/oil separating PCV apparatus is configured to permit it to be tooled in a vertical direction for injection molding.

Abstract: The invention relates to a device for separating a gas-liquid mixture, in which the liquid portion exists in the form of small particles, especially for ventilating a crankcase of an internal combustion engine, by separating and coagulating the liquid particles on a target area. The liquid mixture, after acceleration in acceleration openings provided for this purpose, impacts the target area at an approximately right angle. The aim of the invention is to improve the aforementioned device in such a manner that it allows as high a degree of separation as possible for different sized volume flows of mixtures. For this purpose, the number and/or the cross-sections of the acceleration openings is varied, depending on the volume flow of mixtures, between a small complete cross-section for a low volume flow and a large complete cross-section for a large volume flow.

Abstract: A breather device provided in a 4-cycle engine which is configured to be mounted on a front part of a vehicle body of a snow vehicle, the 4-cycle engine including a crankcase, a crankshaft rotatably supported on the crankcase and provided in a state substantially parallel to the snow vehicle width direction, and a magnet unit connected to one end of the crankshaft, wherein the breather device includes a breather chamber integrally provided on a lateral side of the 4-cycle engine at the same side of the magnet unit and the breather chamber is disposed above the magnet unit in a side view.

Abstract: A valve assembly controls the flow of boosted gas and naturally aspirated gas between an air inlet leading into an intercooler and an oil separator disposed in a head cover in a turbocharged motor vehicle engine. The valve assembly includes a housing defining a first channel through which the natural aspirated gas can pass and a second channel through which the boosted gas can pass. The housing encloses both a check valve and a PCV valve in the second channel. The check valve controls the flow of gas between the first and second channels during normal and boosted engine operation, respectively.

Abstract: The pollution control system includes a PCV valve having an inlet and an outlet adapted to vent blow-by gas out from a combustion engine. A fluid regulator associated with the PCV valve selectively modulates engine vacuum pressure to adjustably increase or decrease a fluid flow rate of blow-by gas venting from the combustion engine. An integral oil trap fluidly coupled to the PCV valve condenses vaporized oil in the blow-by gas into a liquid for re-use in the combustion engine.

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 breather structure for internal combustion engine, the structure making a breather chamber smaller and thus making an internal combustion engine as a whole smaller. A breather chamber and a small chamber are formed. The breather chamber includes a first side face cover. The first side face cover is joined to a case to cover a first one of the right and left side faces of the case. Inside the first side face cover, an auxiliary apparatus chamber is formed. The auxiliary apparatus chamber houses a clutch mechanism connecting or disconnecting the power transmission route. Additionally, formed inside a housing are an external communication port communicating to the outside of the housing, and the small chamber communicating to a crank chamber and to the auxiliary apparatus chamber. Moreover, the auxiliary apparatus chamber communicates to the breather chamber.

Abstract: The present invention relates to a cylinder head cover for covering a cylinder head of a combustion engine. Such cylinder head covers often comprise an oil separator for separating oil and/or oil spray from the blow-by gas of combustion engines. With the present invention the oil separator is formed as a flow-through tube (10) through which the gas with the oil and/or oil spray to be separated flows. The flow-through tube (10) with its longitudinal axis (14) in the flow-through direction lies essentially in the plane of extension of the cylinder head cover (1). A worm-like segment is arranged in the flow-through tube (10), and its thread surfaces (21) form a spiral flow path (2). At the same time the cross section of the flow path lies between 1 mm2 and 800 mm2.

Abstract: A PCV valve assembly includes a housing that is defined by a first housing section and a second housing section. A poppet valve is supported within the housing. The first housing section includes a threaded end that defines a fluid inlet, and the second housing section includes a cylindrical outlet stem and an end flange that defines a restricted integral orifice as a fluid outlet. The diameter of the orifice is smaller than the diameter of the cylindrical outlet stem. A fluid chamber between the end flange and the poppet valve averages out variations in the fluid flow through the PCV valve assembly, thereby reducing vacuum pulsation.

Abstract: An intake regulating system of an engine equips with an intake regulating-device connected with a breather hose for drawing the oil vapor and the leaked gases from the crankcase of the engine, thereby to mix with outside air to feed into the engine for re-combustion. The intake regulating-device comprises a housing and a pressure-sensing valve. The housing has an air inlet hole, an air outlet hole, and a slender hole. The air outlet hole and the slender hole both are in communication with the air inlet of engine via an intake manifold for generating a pressure difference thereby to drive the pressure-sensing valve. Preferably, the intake regulating-device provides a pair of regulating knobs for adapting the pressure-sensing valve with various intake volumes of an engine.

Abstract: An engine system is disclosed. The engine system has an engine block having at least one combustion chamber and at least partially defining a crankcase. The engine system also has an inlet conduit connecting a compressor of a turbocharger with the at least one combustion chamber. The engine system further has an exhaust conduit connecting a turbine of the turbocharger with the combustion chamber and a ventilation conduit connecting the crankcase with the exhaust conduit. The engine system also has a controller in communication with the turbocharger, the controller being configured to adjust the geometry of the turbocharger to maintain a pressure of the crankcase lower than a pressure of the inlet conduit.

Abstract: A vertical internal combustion engine includes a crankshaft enclosed in a crank chamber, a belt-drive transmission mechanism held in a belt chamber and including a rubber belt for transmitting power of the crankshaft to a camshaft included in a valve train, and a transmission case defining the belt chamber. The transmission case has a lower case between the crank chamber and the belt chamber. The belt has a part extending over the crank chamber, and the lower case is disposed to screen the part of the belt from the crank chamber. The belt is lubricated by oil in oil-containing gas from the crank chamber. Thus the oil containing gas is prevented from excessively contacting the rubber belt, so that the life of the belt is extended.

Abstract: A sleeve hydrocarbon trap is provided. In some examples, the sleeve hydrocarbon trap includes a hydrocarbon adsorbing sleeve, the sleeve adapted to be positioned in a sensor bore and the sleeve including one or more hydrocarbon adsorbing layers, and a cage adapted to retain the hydrocarbon adsorbing sleeve in the sensor bore.

Abstract: The pollution control system includes a controller coupled to a sensor monitoring an operational characteristic of a combustion engine, such as engine RPM. A PCV valve having an inlet and an outlet is adapted to vent blow-by gas out from the combustion engine. A fluid regulator associated with the PCV valve and responsive to the controller selectively modulates engine vacuum pressure to adjustably increase or decrease a fluid flow rate of blow-by gas venting from the combustion engine. The controller selectively adjustably positions the fluid regulator to vary the degree of vacuum pressure to optimize the recycling of blow-by gases.

Abstract: An air induction system hydrocarbon trap is provided. In one example, the hydrocarbon trap includes an adsorber roll including an adsorbing material and a corrugate support, where the corrugate support is rolled with the adsorbing material to form a wound adsorber roll. A trap housing is further provided to retain the adsorber roll. A housing cap may be coupled to the housing.

Abstract: An oil mist separator has a pressure regulator valve which is located in the blow-by line downstream of the oil mist separator element in the flow direction of the gas. The pressure regulator valve has a bias so that it opens above a specified pressure difference between the blow-by line and a neighboring chamber. Located around the oil mist separator element is a bypass line which has a bypass valve. The bypass valve has a bias that causes the bypass valve to close below a specified pressure difference between the suction side and the pressure side of the oil mist separation element. The pressure regulator valve and the bypass valve are connected with each other so that the pressure regulator valve, as it closes, increases the bias of the bypass valve.

Abstract: An intake manifold configuration is provided for a chargeable internal combustion engine. The intake manifold configuration includes, but is not limited to an intake pipe leading to a turbocharger, an intake manifold leading from the turbocharger to the internal combustion engine, and a first blow-by channel leading from a crankcase of the internal combustion engine to the intake manifold, the first blow-by channel being connected via a valve to the intake manifold, and the intake manifold configuration comprising a second blow-by channel, which runs from the first blow-by channel to the intake pipe. In this way, on the one hand, a more compact construction of the internal combustion engine is made possible and, on the other hand, the susceptibility to frost is minimized and thus sufficient crankcase ventilation is ensured.

Abstract: A supercharged internal combustion engine in a motor vehicle includes a venting device for the crankcase of the internal combustion engine and a compressor for supercharging the internal combustion engine. A discharge opening for discharging the crankcase gas is provided upstream of the compressor and a sensor for determining the charge pressure of the compressor is provided downstream of the compressor. The discharge opening is connected to the crankcase by a first connection for the airflow, in particular a hose connection. In order to cost-effectively monitor the venting of the crankcase of the internal combustion engine, an opening, to which the charge pressure of the compressor is applied, is provided downstream of the compressor. The first connection for the airflow includes a closing device for closing the opening to which the charge pressure is applied, wherein the closing device closes the opening if the first connection is connected to the discharge opening.

Abstract: A method and a system for correcting combustion in an engine to control for the effect of crankcase gases in the intake system are disclosed. The system includes one or more sensors in the crankcase ventilation system. An air to fuel ratio sensor may be disposed within a breather line and/or a PCV line of the crankcase ventilation system to monitor crankcase gases.

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: 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 breather system for an engine used to vent combustion, or blow-by, gases. The breather system has an axial breather passage disposed within a camshaft of the engine. A radial opening is in fluid communication with the axial breather passage. A valve is positioned within the radial opening in order to prevent oil from entering the axial breather passage when the engine is not in operation.

Abstract: The blow-by gas that has flowed from a front-stage breather-chamber inlet (33) into a front-stage breather chamber (28) floats up around a preliminary valve-seat peripheral wall (22) and a preliminary breather-passage peripheral wall (24) and flows from a breather-chamber inlet (21) into a breather chamber (3). When a breather-chamber peripheral wall (12) is removed from a breather-chamber attaching seat (11), a diaphragm valve (16) is attached to the breather-chamber attaching seat (11) and has a valve face (18) seated on a preliminary valve seat (23), and a plug (27) is taken out of a preliminary breather outlet (25), from which a breather pipe (5) is led out, thereby enabling the front-stage breather chamber (28) to be used for a single-stage breather chamber provided with the diaphragm valve (16).

Abstract: The present invention relates to a deaerating and aerating device (19) for an internal combustion engine (1) for discharging blowby gas out of a crankcase (3), comprising a first line (20) which is connected at one end to the crankcase (3) and at the other end to a fresh gas line (7) downstream of a supercharging device (10) and which contains a deaerating valve (23), and a second line (21) which is connected at one end to the fresh gas line (7) upstream of the supercharging device (10) and at the other end to the crankcase (3) and which contains a throttle device (28) and, parallel thereto, a non-return check valve (29) which provides a blocking action in the direction of the crankcase (3).

Abstract: The invention relates to a ventilation device (19) for an internal combustion engine (1) for evacuating blow-by gas from a crankcase (3), comprising a first line (20), which is connected at the one end to the crankcase (3) and at the other end, downstream of a forced induction device (10), to a fresh-gas line (7) and contains a ventilation valve (23), and a second line (21), which is connected at the one end, upstream of the forced induction device (10), to the fresh-gas line (7) and at the other end, between the crankcase (3) and the ventilation valve (23), to the first line (20) and contains a throttle device (23).

Abstract: In a breather device for engine, in which an inlet of a breather chamber communicates with a crank chamber through a reed valve, the reed valve being formed of: a fixed stopper plate arranged so as to be opposed to a valve seat formed on an end face of the inlet facing the breather chamber; and an elastic valve plate fixed at one end thereof to the stopper plate and capable of bending elastically to change its position from a closed position in which the elastic valve plate closes the inlet by seating on the valve seat to an opening limit position in which the elastic valve plate opens the inlet and abuts against the stopper plate, the stopper plate is provided at a center part thereof with an oil discharge hole through which oil present between the elastic valve plate and the stopper plate is pushed out when the elastic valve plate is pushed toward the opening limit position in which the elastic valve plate abuts against the stopper plate by pressure in the crank chamber.

Abstract: The present invention includes an air introduction device capable of introducing air into a crankcase of the engine during a supercharging operation of a supercharger, so that blow-by gas within the crankcase can be scavenged into the intake air passage.

Abstract: An electronically controlled blow-by gas returning apparatus for an internal combustion engine which corrects a fuel injection amount is disclosed. This blow-by gas returning apparatus is provided with an electronically controlled ventilation valve and a control unit. The ventilation valve regulates the flow rate of blow-by gas. The control unit controls the ventilation valve. The control unit controls the opening degree of the ventilation valve such that the actual value of the opening degree of the ventilation valve is maintained at a demand value of the opening degree of the ventilation valve. The control unit corrects the demand value based on the degree of enrichment of the actual air-fuel ratio in relation to a target air-fuel ratio and an intake air amount which is the amount of air fed into a combustion chamber of the internal combustion engine.

Abstract: An electromagnetic PCV valve includes a valve seat, a valve element, a step motor for moving the valve element, and a housing that houses the valve seat, the valve element, and the step motor. When the valve element is moved by the step motor, a size (an opening degree) of a blow-by gas passage defined between the valve seat and the valve element is changed. The step motor is configured to selectively receive energization for moving the valve element and energization for holding the valve element in a fixed position. A heating apparatus of the PCV valve 1 includes a cover member and an output shaft that conducts heat generated in the step motor by energization to the valve element and the valve seat, and an electronic control unit (ECU) for conducting energization of the step motor to hold the valve element in the fixed position.

Abstract: A valve assembly controls the flow of boosted gas and naturally aspirated gas between an air inlet leading into an intercooler and an oil separator disposed in a head cover in a turbocharged motor vehicle engine. The valve assembly includes a housing defining a first channel through which the natural aspirated gas can pass and a second channel through which the boosted gas can pass. The housing encloses both a check valve and a PCV valve in the second channel. The check valve controls the flow of gas between the first and second channels during normal and boosted engine operation, respectively.

Abstract: The invention relates to a blow-by gas recirculation system for an internal combustion engine. An oil separation cover 10 has a surge-tank mounting portion 400 integrally formed therewith in a columnar shape having a cam-shaped cross-section and a height approximately equal to that of an oil separation space OS. The surge-tank mounting portion 400 has a flat upper surface serving as a mounting seat surface 401 capable of coming into surface contact with an attaching seat surface 7a of a surge tank 7. A first opening 403 of a gas passage from a chamber 300 is opened in a vicinity of an opening of a support through-hole 402 on the mounting seat surface 401.

Abstract: A pressure control valve is provided for a crankcase ventilator of an internal combustion engine. The pressure control valve includes a valve housing, a valve diaphragm, and a valve spring. A separate shutoff valve is provided for shutoff of the pressure control valve. A crankcase ventilation device includes such a pressure control valve. A method is provided for operating the crankcase ventilation having the pressure control valve.

Abstract: Crankcase venting system comprising an oil separator arranged in a housing that separates the housing into an unfiltered air side and a filtered air side, wherein in the area of the unfiltered air side a valve is arranged that is comprised of a valve plate, a pressure spring resting against the valve plate, as well as a valve seat that is closed or opened by means of the valve plate, and wherein the valve is closed off by a lid that is locked or snapped in place.