Abstract: An engine includes a breather conduit, an intake conduit, and an air filter assembly. The air filter assembly includes a case and a filter element. The case includes a first opening for receiving the breather conduit, and a second opening for receiving the intake conduit. The filter element includes a first aperture, a second aperture, and filter media at least partially defining an interior chamber of the filter element. The first and second apertures of the filter element are at least partially aligned with the first and second openings of the case, respectively. The filter element is positioned in the case such that the breather conduit and the intake conduit are directed to or from the interior chamber of the filter element, such that air filtered by the filter media mixes with unfiltered gases from the breather conduit in the interior chamber of the filter element prior to entering the intake conduit.

Abstract: A regulator (108) comprising a first chamber (132), and second chamber (134) and an actuator (130). The second chamber (134) is coupled to the first chamber (132) through an aperture (156). The actuator (130) is arranged to the adjust the size of the aperture (156) according to a pressure differential between fluid pressure in the first chamber (132) and a pressure reference (36). The rate of change of the cross sectional area of the aperture (156) is arranged to have a non-linear response to a change in the pressure differential.

Abstract: A blow-by gas processing circuit for an internal combustion engine includes a blow-by gas lead-out pipe uprising from the engine and extending along one side surface of an air cleaner, an upper pipe bending laterally from an upper end of the lead-out pipe and extending along the one side surface, a descending pipe bending downward from an extremity portion of the upper pipe and extending along the one side surface to reach a purification completion chamber of the cleaner, a branch pipe branching downward from an intermediate portion of the upper pipe and connected to a blow-by gas outlet port opened to an intake passage penetrating an insulator member, and a control valve placed in an upper portion of the branch pipe and opening responding to a rise in boost negative pressure of the engine.

Abstract: An internal combustion engine includes a plurality of PCV ports formed internally within the engine block and the cylinder head. The PCV ports directly connect a crankcase chamber with each of a plurality of intake ports defined by the cylinder head. The blow-by gases that accumulate within the crankcase chamber are directly vented through the internal PCV ports into the intake ports.

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: A turbocharged motor vehicle engine system includes an engine having an intake manifold, an exhaust manifold, and a crankcase ventilation outlet. A turbocharger includes a turbine having an inlet fluidly connected to the exhaust manifold through an exhaust conduit and a turbo compressor having an outlet fluidly connected to the intake manifold through an inlet conduit. The turbo compressor also includes an inlet. A crankcase gas conditioning member includes an inlet section fluidly connected to the crankcase ventilation outlet and an outlet section fluidly connected to the turbo compressor inlet. An idle bypass conduit includes an inlet portion fluidly connected to the outlet section of the crankcase gas conditioning member and an outlet portion fluidly connected to the inlet conduit. The idle bypass conduit is configured and disposed to selectively bypass the turbo charger while the engine is operating at an idle.

Abstract: Crankcase ventilation filter arrangements and components therefore are described. Example arrangements are described. In one, a serviceable filter cartridge includes a check valve therein, for protection during vehicle rollover. Handle arrangements are also described. An example filter cartridge is described in which media, surrounding an open interior, is positioned between first and second, opposite, end pieces. A first end piece has a projection on an opposite side from the media, the projection including framework having an upper rail supported by spaced supports. Methods of use are described.

Abstract: An oil pump housing of an internal combustion engine flanged to a crankshaft housing, which includes, but is not limited to an oil pump housing wall. The oil pump housing has an oil collecting tray in an upper region of the oil pump housing wall. An oil return channel is integrated in the oil pump housing. An oil return channel extends from an oil inlet opening in the oil collecting tray as far as an oil outlet opening in an area below an oil pan level.

Abstract: Crankcase ventilation filter systems are described, along with components and selected features thereof. Example features include preferred use of a backpressure limiting valve regulation (regulator) arrangement; and, a vacuum limiting valve regulation (regulator) arrangement. An example embodiment is provided which use two filter cartridges and two drain arrangements. Another example is provided which uses a single cartridge. Example filter cartridges are depicted and described.

Abstract: A flow control system is provided having an engine, a turbocharger, and positive crankcase ventilation (PCV) line, and a flow regulating device. The engine has an air-oil separator and an intake manifold. The air-oil separator separates oil droplets and oil mist from a blowby gas. The turbocharger has an air inlet and an air outlet, where the air outlet is connected to the intake manifold of the engine. The positive crankcase ventilation (PCV) vent line has a first end connected to the air-oil separator and a second end connected to the air inlet of the turbocharger. The PCV vent line delivers the blowby gas from the air-oil separator to the air inlet of the turbocharger. The flow regulating device is located in the PCV vent line. The flow regulating device selectively limits the flow of blowby gas from the air-oil separator to the air inlet of the turbocharger.

Abstract: Otto intake-cycle controlled-air (throttled) internal combustion engines suffer from parasitic pumping losses associated with partial vacuums developed in their intake manifolds and in the cylinders above their pistons. To solve this problem, there is provided individually partitioned dry-sump crankcases dynamic pneumatic coupling pressure reduction cycle system and method that reduce the damaging parasitic effects of the differential pressure about a piston head during an intake cycle which is a source of part-load pumping-loss friction. This closed loop system includes an independent supplemental mechanical fail-safe system of a turbo-compound engine variant for pneumatic coupling of individual cylinder-crankcase volumes. It does not alter the cylinder homogeneous mixture charge integrity and stability. The system is applicable to several engine configurations, such as controlled air intake or uncontrolled air intake combustion engines, using different fuel types, either in liquid or in gazeous state.

Abstract: Systems and methods for ventilating crankcase gases in a crankcase ventilation system via crankcase pressure pulsations are disclosed. In one example approach, a method comprises driving flow of crankcase ventilation gases through a crankcase of the engine from a fresh air inlet of the crankcase to an outlet of the crankcase via crankcase pressure pulsations while restricting backflow of crankcase ventilation gases from the outlet to the inlet, where the inlet and outlet are coupled upstream of an intake throttle of the engine.

Abstract: Methods and systems are provided for using a crankcase vent tube pressure or flow sensor for diagnosing a location and nature of crankcase system integrity breach. The same sensor can also be used for diagnosing air filter plugging and PCV valve degradation. Use of an existing sensor to diagnose multiple engine components provides cost reduction and sensor compaction benefits.

Abstract: A centrifugal precipitator having a housing and a rotatable driven rotor for precipitating oil mist from crankcase ventilation gas of an internal combustion engine. The housing has an inlet for gas to be deoiled, a deoiled gas outlet and an oil outlet. The housing includes a metallic main element surrounding the rotor and carrying the rotor bearing. A housing bottom is built onto the main element from below. The housing attaches with a flange to a counterflange or module of the engine. The housing flange is formed on the main element and the housing. The oil outlet runs through a first flange part of the housing bottom and this flange part has a circumferential rim. A second flange part of the main element has a collar engaging over part of its periphery behind the rim and can be clamped with the rim in between against the counterflange.

Abstract: A combustion engine comprises a suction valve system for discharging blow-by gas from the crankcase into an air inlet channel for the cylinders. The suction valve system is driven by an electromotor which is connected to a power source. The system comprises a rev counter which measures the rpm of the suction valve system, as well as a control unit which is connected to the power source, the rev counter and the engine management system. The control unit can set predefined engine conditions as well as the power flowing to the suction valve system to have this system rotate at a predefined speed. The value of the set power is a measurement for the blow-by. In lieu of regulating the power flowing to the suction valve system, the control unit can also set the power flowing to the suction valve system to a predefined value. The rev counter then measures the rpm of the suction valve system, which is a measurement for the blow-by.

Abstract: A piston engine may include a piston assembly, which may include a piston having a self-centering feature. The piston assembly may be configured to translate in a bore of the cylinder, and contact a combustion section and/or gas driver section. The self-centering feature may use a flow of blow-by gas in a clearance gap to provide a self-centering force on the piston assembly. The self-centering feature may include one or more slotted pockets, a step, a tapered portion, any other suitable feature, or a combination thereof. Optionally, a piston assembly may include a feature that aids in self-centering such as, for example, a labyrinth seal.

Abstract: A system for improving PCV flow of an engine is presented. The system can reduce engine oil consumption when an engine is exposed to lateral or centripetal force. In one example, the system includes a mechanically operated valve that acts to limit PCV flow in a conduit external to an engine.

Abstract: A system for providing air to an internal combustion engine comprises a crankcase ventilation unit that receives unrefined blowby gas from a crankcase, separates oil from the unrefined blowby gas, and discharges refined blowby gas. A conduit delivers the refined blowby gas to an air cleaner housing. The air cleaner housing comprises a first chamber that receives intake air through a first port, a second chamber that receives intake air from the first chamber and refined blowby gas from the conduit through a second port, and a third chamber that receives a mixture of intake air and refined blowby gas from the second chamber and discharges the mixture through a third port. A primary filter element filters the intake air as it passes from the first chamber to the second chamber. A secondary filter element filters the mixture as it passes from the second chamber to the third chamber.

Abstract: A sludge adhesion inhibiting structure for an internal combustion engine according to the present invention is characterized in that a sludge inhibiting layer inhibiting generation or adhesion of sludge is formed on a surface of an area inside the internal combustion engine into which oil as a liquid does not always spread and which is contacted by oil mist as a gas. Preferably, the sludge inhibiting layer is made up of a solid alkali substance. Furthermore, the sludge inhibiting layer is provided in a head cover and formed on an inner surface of an oil separator chamber separating the oil from a blow-by gas.

Abstract: An assembly for use in a crankcase ventilation system of an internal combustion engine includes a shutter arrangement that is constructed and arranged for preventing that residual gases and/or vapors out of a crankcase flow into an air intake system during a period of time that starts at shut down of the engine and ends after it has been re-started. The assembly also includes an outlet that is constructed and arranged for removing at least a substantial part of the residual gases and/or vapors from the engine as long as it is shut down.

Abstract: An engine with an efficient selectively operable vacuum source is disclosed. In one example, an electric vacuum pump with oil wetted seals provides vacuum to a vehicle vacuum reservoir while exhausting air to an interior region of the engine, such as the crankcase. The approach may provide for improved efficiency when generating vacuum.

Abstract: An engine lubrication method is provided. The four-cycle engine has an engine block having a cylindrical bore and an enclosed oil reservoir. A crankshaft is mounted in the engine block. An oil pump driven by the cam gear, brings the oil from the oil reservoir and the valve chamber. The engine is provided with a cylinder head assembly having a pair of overhead intake and exhaust valves. A circular arc wall surrounds the web of the crankshaft at a slight distance from the web. The crankshaft web causes the oil to fly to lubricate engine parts and the oil, returns into the oil reservoir by a check valve. Flowing of oil in to the combustion chamber when the engine is oriented to incline is prevented by oil recesses and long pipes. Another lubrication and breathing system without pump is presented, wherein construction except pump is basically followed.

Abstract: An engine air management system is provided for an internal combustion engine generating blowby gas in a crankcase containing engine oil and oil aerosol. The system includes combinations of two or more of an air-oil separator, an air filter, and an acoustic silencer.

Abstract: An engine assembly may include an engine structure, intake and exhaust valves, hydraulically actuated valve lift mechanisms, and a valvetrain ventilation line. The engine structure may define a combustion chamber, intake and exhaust ports in communication with the combustion chamber, a crankcase, and a valvetrain chamber isolated from the crankcase. The intake valve may be located in the intake port and the exhaust valve may be located in the exhaust port. The hydraulically actuated valve lift mechanisms may be supported on the engine structure within the valvetrain chamber and engaged with the intake and exhaust valves. The valvetrain ventilation line may be in communication with the valvetrain chamber and may provide communication between the valvetrain chamber and the intake port.

Abstract: Methods and systems are provided for generating vacuum from crankcase ventilation flow. During both directions of gas flow between an engine intake manifold and a crankcase, gases are directed through one or more aspirators to produce vacuum. The drawn vacuum may then be used to operate various engine vacuum actuators.

Abstract: A system for improving PCV flow of an engine is presented. The system can reduce engine oil consumption when an engine is exposed to lateral or centripetal force. In one example, the system includes a mechanically operated valve that acts to limit PCV flow.

Abstract: The invention relates to a device (1) for ventilating a crankcase of an internal combustion engine, comprising a ventilation line leading from the crankcase to the suction line of the internal combustion engine, an oil-mist separator (2) for separating the oil parts from the blow-by-gases containing the oil-mist from the crankcase is arranged in the path thereof. Also, said device (1) comprises a pump (3) which is arranged upstream of the oil-mist separator (2) and which is used to produce a negative pressure. The invention is characterized in that the oil-mist separator (2) and the pump (3) are embodied as connected modules thus providing a particularly compact structure.

Abstract: An engine assembly includes an engine defining a combustion chamber and a crankcase volume, and an intake assembly having an air cleaner assembly, a throttle, and an intake manifold in a series arrangement and fluidly coupled with the combustion chamber. A first and second air-oil separator may define respective first and second separator volumes, each respectively configured to extract oil from air flowing through the volume. A first conduit may fluidly couple the crankcase with the first separator volume, a second conduit may fluidly couple the intake manifold with the first separator volume; a third conduit may fluidly couple the crankcase with the second separator volume; a fourth conduit may fluidly couple the air cleaner assembly with the second separator volume; and a fifth conduit may fluidly couple the air cleaner assembly with the first separator volume.

Abstract: A chamber structure for a vehicle may include a housing, a chamber formed inside the housing and into which a blow-by gas flows, and a cooling water path which may be formed inside the housing around the chamber and through which a preheated cooling water passes.

Abstract: A ventilation head cover of an engine may include a head cover main body having a blow-by exhaust portion, a baffle plate disposed in the head cover main body with a predetermined distance from the head cover main body to form a gas passage with the blow-by exhaust portion, and an oil inflow prevention wall formed to an end portion of the baffle plate and engaged with the head cover main body, wherein the oil inflow prevention wall includes at least a gas passage hole to form the gas passage.

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: An engine having a crank case of a variable volume may include a crankshaft that may be disposed in a crank case and may be connected to a piston through a connecting rod, which reciprocate in a cylinder, a balance shaft that may be disposed in the crank case and may be operated by the crankshaft, a chamber that may be extended from the crank case, and a balance weight that may be formed on the balance shaft and selectively opens or closes a fluid communication between the chamber and the crank case according to a position of the piston.

Abstract: The invention relates to a cylinder head (1) of an internal combustion engine, comprising at least one hollow camshaft (2) which forms an exhaust for blow-by gases containing oil mist from the crank housing and is also embodied as an oil mist pre fractionator for the preliminary separation of the oil part from these gases. Furthermore, an oil mist post-fractionator (5) is axially arranged on the end of the camshaft (2), in order to carry out an especially effective separation of oil dissolved in the blow-by gases.

Abstract: A system for improving PCV flow of an engine is presented. The system can reduce engine oil consumption when an engine is exposed to lateral or centripetal force. In one example, the system includes a mechanically operated valve that acts to limit PCV flow in a conduit external to an engine.

Abstract: An improved breather apparatus for use on fuel tanks is disclosed. The breather apparatus may include a mounting base including a valve seat and at least one venting cavity, a valve mounted on the valve seat, and a cover operatively associated with the mounting base. The cover may include at least one venting cavity connected to the venting cavity of the mounting base. The breather apparatus may also include an air filter operatively connected to the valve. Methods of assembling and using the disclosed breather apparatus are also disclosed.

Abstract: Provided is a control apparatus, which can successfully suppress that deterioration of combustion is caused in response to inflow of a large amount of blow-by gas to cylinders at the time of a valve return from a valve stop state in an internal combustion engine including a positive crankcase ventilation system and a variable valve operating mechanism that is capable of stopping at least one valve of an intake valve and exhaust valve in a closed state. A valve stop control is performed which stops the intake valve and exhaust valve in a closed state when a fuel cut of the internal combustion engine is executed. A deviation amount ?A/F between a predetermined target air fuel ratio and an actual air fuel ratio detected by an A/F sensor at the time of a valve return is obtained. A correction is performed to decrease a fuel injection amount by a fuel amount equivalent to the deviation amount ?A/F at the time of the subsequent valve returns.

Abstract: An exhaust system for a variable cylinder engine for assuring purification of exhaust gas without increasing the number of catalysts and an intake system for purifying blow-by gas. The exhaust system includes an activation side exhaust pipe connected to an activation cylinder group that operates normally. A deactivation side exhaust pipe is connected to a deactivation cylinder group wherein fuel supply is stopped under a particular condition. A gathering section is connected to downstream ends of the activation side exhaust pipe and the deactivation side exhaust pipe with a sub-catalyst disposed in the activation side exhaust pipe and a main catalyst disposed at the gathering section. The main catalyst is formed wherein gas passing therethrough is partitioned into flows independent of each other in a flow path direction. The activation side exhaust pipe and the deactivation side exhaust pipe are connected in a mutually independent state to the main catalyst.

Abstract: A fuel supplying apparatus is disclosed that suppresses intrusion of oil mist into a negative pressure introducing inlet of an automatic cock and that, thereby, improves the degree of freedom of disposition. The negative pressure introducing inlet of the automatic cock is connected to a crankcase through a negative pressure communication path. The automatic cock is opened by a negative pressure generated in the crankcase and, thereby, a fuel supply path is opened that is for supplying fuel from a fuel tank to an internal combustion engine. The negative pressure communication path communicates with the air cleaner through a purge path that branches from the negative pressure communication path at a halfway point of the negative pressure communication path. The point at which the purge path branches from the negative pressure communication path is set to be at the lowest position of the negative pressure communication path to be able to collect the oil mist intruding from the crankcase.

Abstract: A crankcase ventilation device features a closing valve with a valve body. The valve body executes a positioning movement between a closed and an opened position. A sensor device for detecting the positioning movement of the valve body is disposed in the housing.

Abstract: A device for cleaning of crankcase gas including a centrifugal separator having a housing and a separation chamber in which a rotor is arranged. The separator is connected to a gas inlet for conducting crankcase gas from the crankcase to the centrifugal separator and a gas outlet for conducting the cleaned gas from the separator. A motor is arranged to rotate the centrifugal rotor. A sensor is provided for detection of a parameter and is arranged to communicate with the control equipment. The control equipment is operatively connected to a valve for adjusting the flow of gas through the centrifugal separator. The control equipment is arranged to change the position of the valve in response to a detected change of the parameter such that the gas pressure in the crankcase is maintained at a predetermined value.

Abstract: A housing has an intake passage extending substantially in a vertical direction of a vehicle. A valve is configured to open and dose the intake passage. A shaft supports the valve. A bearing supports the shaft. A hose is connected with an upper side of the housing in the vertical direction and configured to lead intake air into the intake passage. A communication passage configured to communicate an inside of an internal combustion engine of the vehicle with the hose. The communication passage has an opening in the vicinity of a point directly above the bearing. The hose has a wall surface defining a condensate passage, which connects the opening with a target location from which condensate is to be dropped.

Abstract: An apparatus for anti-freezing a PCV may include a PCV chamber forming a space therein, a blow-by gas expanding in the space, an inlet connected to the PCV chamber and adapted to supply the blow-by gas to the PCV chamber, an outlet formed lower than the inlet with respect to a horizontal axis, slanted to the horizontal axis by a predetermined angle, and connected to the PCV chamber so as to exhaust the blow-by gas to a rear end of a throttle body, protruding portions formed at a front surface and a rear surface of an inner wall of the PCV chamber along an extending direction of the outlet, and guiding a condensed water at the inner wall of the PCV chamber, and a partition having plate shape and mounted along a length direction of the protruding portions at a part of the protruding portions.

Abstract: A blow-by gas collection passage (91) extends in a cylinder block (1) and a cylinder head (3). A crank chamber (61) is connected to an oil separator (92) through the blow-by gas collection passage (91). A cutout portion is formed in an upper end portion of a wall portion (97) of the blow-by gas collection passage (91), and the oil separator (92) contacts an upper surface of the cylinder head (3) to form a connection portion (98) through which the blow-by gas collection passage (91) is connected to a cam chamber (3A). Thus, new air in the cam chamber (3A) flows into the blow-by gas collection passage (91) at an inlet portion of the oil separator (92) through the connection portion (98) to dilute the blow-by gas.

Abstract: A PCV anti-freezing apparatus for two-cylinder engine may include a PCV (Positive Crankcase Ventilation) nipple connected to an intake manifold of a two-cylinder engine, and an oil separator formed within the PCV nipple.

Abstract: An engine assembly includes an engine structure, an intake air assembly and a crankcase ventilation line assembly. The engine structure defines a cylinder bore, an intake port in communication with the cylinder bore, and a crankcase. The air intake assembly is in communication with the intake port. The crankcase ventilation line assembly includes a fresh air line and an oil surge protection device. The fresh air line is in communication with the crankcase and the air intake assembly and provides fresh air to the crankcase. The oil surge protection device is in communication with the fresh air line and defines an oil obstruction inhibiting oil flow to the air intake assembly while allowing air flow between the crankcase and the air intake assembly.

Abstract: This breather apparatus has a rotation separator that is fastened to a camshaft, and that rotation separator has a base plate section and a plurality of protruding plates that extend from the base plate section. Moreover, a separator housing is provided in the cylinder head, and comprises an air intake on one end, and an exhaust outlet on the other end. Furthermore, a reed valve that opens and closes by the change in pressure inside a cam chamber is provided in the air intake. Blowby gas that is guided to the cam chamber hits against the protruding plates when passing in the radial direction of the rotation separator, and oil mist is captured by those protruding plates. Continuing, the blowby gas is guided from the cam chamber into the separator housing via the reed valve. When passing through the reed valve, the flow rate of the blowby gas changes, so oil mist is effectively captured by the inner wall surface of the separator housing.

Abstract: In a method for operating an internal combustion engine, a crankcase of the internal combustion engine has a vent into the intake section of the internal combustion engine, and upon outgassing of fuel out of engine oil present in the crankcase, the operating point of the internal combustion engine is modified so that the air-fuel ratio does not fall below a definable value.

Abstract: A breather system functions, under high load conditions, as an open breather system, and functions as a closed breather system under low load conditions. The breather system includes a first flow path between the engine crankcase and an air intake for the engine, and a three-way valve mechanism located within the flow path and responsive to air intake depression pressure to close the pathway leading to the air intake and allow for a second flow path between the engine chamber and atmosphere to function as an open breather system. When the air intake depression pressure in the air intake is such that the valve leading to the air intake is open, the system operates as a closed breather system.

Abstract: A method is provided for producing a ventilation bore in a thrust bearing of a crankcase of a reciprocating internal combustion engine by milling. The milling cutter is an angled-head milling cutter, which is introduced into the crankcase in the direction of a cylinder longitudinal axis and is moved in the direction of a crankcase longitudinal axis until the thrust bearing is perforated. Subsequently, the angled-head milling cutter is moved back in the direction of the crankcase longitudinal axis and removed from the crankcase by moving the angled-head milling cutter in the direction of the cylinder longitudinal axis. Internal stresses in the crankcase are avoided by the production of the ventilation bore, as a result of which the strength of the crankcase is increased.

Abstract: An oil mist separator (100) for an internal combustion engine that separates an oil component in a gas, which is introduced from a crankcase of the internal combustion engine, from the gas, includes a porous filter (150) that separates, from the gas, the oil component in the gas, the porous filter (150) being provided in a passage, through which the gas passes, and being coated with a counteragent for neutralizing an acid substance.