Abstract: A breather chamber is integrally provided on the lateral side of a 4-cycle engine which is configured to be mounted on a front part of a vehicle body of a snow vehicle.

Abstract: A crankcase ventilation system for an internal combustion engine has a jet pump suctioning scavenged separated oil from the oil outlet of an air/oil separator and pumping same to the crankcase.

Abstract: The present invention provides a breather apparatus in a combustion engine having a sufficient gas-liquid separation function without involving an additional parts such as a breather tank and an arrangement space thereof. A breather chamber is formed in an air cleaner case, and the breather chamber is communicated with a crank case through a breather pipe. Preferably another breather chamber is formed in the crank case in addition to the breather chamber in the air cleaner case, and the breather pipe is connected to a breather outlet of the breather chamber in the crank case. The breather chamber in the air cleaner case is provided in a clean side space on an intake-air downstream side of a filter element.

Abstract: To provide a layout structure of a hydraulic control valve for a valve train in an internal combustion engine which can reduce the influence of heat from the cylinders and can avoid the impairment of the external appearance of the internal combustion engine. An internal combustion engine has a valve operation characteristics changing mechanism that changes the operation characteristics of at least one of an intake valve and an exhaust valve. A hydraulic control valve for a valve train controls the pressure of a hydraulic fluid supplied to the valve operation characteristics changing mechanism. The hydraulic control valve is located on the left side surface of right and left crankcases that support and cover a crankshaft at a position below cylinders.

Abstract: The invention relates to a cylinder head (1) of an internal combustion engine with a camshaft bearing mechanism (2) situated thereon in which a hollow camshaft (3) is rotatably mounted, forming an outlet for discharging blow-by gases laden with oil droplets out of the crankcase and is designed as an oil droplet separator for separating the oil content out of these gases. The camshaft (3) passes through a valve space (11). A rocker cover (13) or a multichannel device (27) is connected axially to at least one end of the camshaft (3), forming an axial gap (9), each having a channel (10) connected coaxially to the hollow space (5) of the camshaft (3) so that blow-by gases from which the oil has been removed can be discharged from the camshaft (3), and each being designed so that they either form an oil collecting space (12) that is sealed with respect to the valve space (11) or they introduce oil that has been separated into such an oil collecting space (12).

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 collecting electrode for an electrostatic precipitator in an internal combustion engine, which is easily replaceable during routine maintenance.

Abstract: An oil mist removal device, with oil fill, is provided for an internal combustion engine. A housing has first and second passages, and a separator therebetween. An oil fill port in the first passage is provided for adding oil to the engine.

Abstract: A head cover assembly for covering a crankcase of an internal combustion engine includes a head cover and an integral oil separator. The oil separator includes a housing that defines a flow path that separates oil from crankcase gases passing therethrough. At least a portion of the housing is integrally formed along an inner surface of the head cover.

Abstract: A breather for a motorcycle engine separates and traps oil droplets entrained with crankcase gases. The breather has a container with a removable lid, an inlet for crankcase gases and entrained oil droplets extending through the lid into the container, filter media within the container to trap entrained oil droplets in the crankcase gases in the container, and outlet ports in the lid allowing gases to escape from within the container.

Abstract: A crankcase ventilation system for a reciprocating internal combustion engine includes an exhaust outlet and a collector for gathering gases from the engine crankcase. An eductor is connected to the collector and to the exhaust outlet. The eductor includes a generally cylindrical body extending into the exhaust passage of the exhaust outlet and having discharge, clean out, and receiver ports, so that crankcase gases will be drawn through the eductor and discharged into exhaust flowing through the exhaust outlet.

Abstract: An oil separator element of the type that is used, for example, for the separation of oil from blow-by gases in internal combustion engines is disclosed. The oil separator element has a housing which forms a cavity through which the gas can flow. The housing has an interface which divides the oil separator element into two element halves. Each of the element halves has a groove family in the interface. The grooves of the two families thereby run at an angle to one another in the interface and at least some of the grooves intersect one another. In an oil separator element of this type, the air flowing through is set in rotational motion so that both on account of the centrifugal forces that occur as well as the impact of the oil mist or the oil droplets that are contained in the gas that is carrying the oil, these oil droplets or oil mist are separated on the walls of the grooves.

Abstract: A closed crankcase ventilation system for an internal combustion engine is disclosed. A compressor is configured to compress air and enhance the venting of crankcase emissions from a crankcase of the engine. A flow path is provided between the crankcase and an intake of the compressor. A prioritizing device is situated in the flow path and configured to regulate the flow of crankcase emissions and control pressure within the crankcase. A treatment element is provided downstream of the compressor and configured to treat the compressed air and crankcase emissions to remove entrained oil. A first conduit downstream of the treatment element is configured to introduce a first portion of the compressed air and crankcase emissions into one of an exhaust system for the engine and an air intake system for the engine.

Abstract: A pulsating oil pressure reducing device 40 for an internal combustion engine has an oil chamber 41 for reducing pulsating oil pressure in a discharge passage 30 for carrying oil discharged from an oil pump 20. The oil chamber 41 communicates with the discharge passage 30 by way of a connecting port 41a1 and makes the oil stagnate therein. The oil chamber 41 is connected to the discharge passage 30 by an air vent passage 45 through which air is discharged from the oil chamber 41 into the discharge passage 30. The air vent passage 45 has an inlet port 45a opening into a top part 41a of the oil chamber 41 and a discharge port 45b opening into the oil passage 30 at a level above the inlet port 45a. Since the pulsating oil pressure reducing device 40 having the air vent passage separately from the connecting port, air can be efficiently discharged from the oil chamber and the degree of freedom of placement of the oil passage and the oil chamber is increased.

Abstract: The invention relates to a cylinder head (1) of an internal combustion engine with a camshaft bearing mechanism (2) situated thereon in which a hollow camshaft (3) is rotatably mounted, forming an outlet for discharging blow-by gases laden with oil droplets out of the crankcase and is designed as an oil droplet separator for separating the oil content out of these gases. The camshaft (3) passes through a valve space (11). A rocker cover (13) or a multichannel device (27) is connected axially to at least one end of the camshaft (3), forming an axial gap (9), each having a channel (10) connected coaxially to the hollow space (5) of the camshaft (3) so that blow-by gases from which the oil has been removed can be discharged from the camshaft (3), and each being designed so that they either form an oil collecting space (12) that is sealed with respect to the valve space (11) or they introduce oil that has been separated into such an oil collecting space (12).

Abstract: An oil separator separates oil from crankcase gases of an internal combustion engine. The oil drainage device includes an inlet, an outlet and a plurality of stages arranged in a stack between the inlet and the outlet. Each stage includes a generally upright side wall having opposite top and bottom faces. An end wall is disposed at the bottom face of the side wall. The end wall has opposite upper and lower surfaces. The end wall has a bore extending through the upper and lower surfaces for receiving a flow of crankcase gases therethrough. A plate diverts the flow of crankcase gases exiting the bore for creating a pressure increase that separates oil from the crankcase gases. A tube extends through the bore for directing the flow of crankcase gases therethrough. The tube being spaced apart from an inner surface of the bore allowing oil to flow therethrough in an opposite direction relative to the crankcase gases.

Abstract: In an arrangement comprising at least one operating unit of a camshaft adjusting device for an internal combustion engine, the operating unit and at least one ventilation unit of a ventilation device are combined in an assembly module.

Abstract: A method and apparatus providing positive crankcase ventilation, for the crankcase of an four-stroke engine having one or more reciprocating pistons exposed on a bottom side thereof to the crankcase, whereby the crankcase and bottom side of the one or more reciprocating pistons define a crankcase volume that varies cyclically with reciprocation of the one or more pistons. The cyclically varying volume of the crankcase, resulting from reciprocation of the one or more pistons, is used for generating a flow of air through the crankcase. The flow of air through the crankcase varies substantially in direct proportion to engine speed. An inlet control device and an outlet control device are attached to the crankcase, for controlling the flow of air through the crankcase.

Abstract: A breather apparatus includes a first oil separation chamber disposed in a case and extending substantially in a vertical direction. The case constitutes a part of a vertical wall of an internal combustion engine, and blowby gas flows inside the case. A second oil separation chamber is superposed upon the first oil separation chamber. An opening formed in the lower part of the first oil separation chamber is communicated with the inside of the case. An upper part of the second oil separation chamber is communicated with the first oil separation chamber via a through hole. The blowby gas which has flown into the second oil separation chamber is supplied into an intake system via an outflow port formed in the lower part of the second oil separation chamber. In the separation chambers, oil in the blowby gas is separated by mutually different flow characteristics.

Abstract: An oil separating device for an internal combustion engine connected in a flow path of blow-by gas, loaded with oil particles, from the crankcase to the inlet manifold section of the internal combustion engine and comprising an oil separator formed with at least one passage through which the flow of oil-bearing blow-by gas is guided and deflected, the oil particles being separated at a wall which causes them to flow back to the crankcase in an oil return path, is characterized in that the at least one passage is defined by a slot of small, variable slot width and large cross sectional area, the slot width being varied against spring force of an elastic member in dependence on the volume flow of the blow-by gas through the slot.

Abstract: A lubrication and breather system for an engine that is generally adapted for use as either a vertically-oriented crankshaft-type engine or a horizontally-oriented crankshaft-type engine. The crankcase has first and second bearing bosses supporting first and second journal portions of the crankshaft. The second bearing boss lies above the first bearing boss when the engine is of the vertical-type. The system includes a cap that is secured over the second bearing boss and cooperates with the second bearing boss to define an annular chamber for receiving splashed oil produced in the crankcase. The cap has a plurality of ribs formed thereon that reduce an amount of oil, which is entrained in the blow-by gas, sent from the annular chamber to the breather chamber. The second bearing block includes an oil feed hole, a plurality of oil sumps, and a plurality of oil return holes, with the oil return holes being of relatively smaller size. Each of the oil sumps is associated with one oil return hole.

Abstract: An overhead-valve internal combustion engine with a breather chamber arranged below a camshaft housing chamber for housing the camshaft and formed between a cylinder head and a cylinder block. A driving force transmission chamber is formed between a cylinder and a crankcase. Thus, the discharge of oil from the breather chamber is performed smoothly so as to enhance the vapor-liquid separation performance. A breather inlet passage has an upper end thereof in communication with an inside of a camshaft housing chamber and a lower end thereof in communication with a breather chamber at a position corresponding to a mating face between a cylinder block and a crankcase is formed in the cylinder block such that the breather inlet passage extends vertically. An oil discharge hole is in communication with a lower portion of the inside of the breather chamber and is formed in the crankcase.

Abstract: A method and apparatus for the treatment of blow-by gas from a crankcase of an internal combustion engine. A particle and droplet filter removes at least some of any particles or droplets in the gaseous stream. The filtered gaseous stream is passed through a primary heat exchanger, and a catalyzed soot filter downstream of the primary heat exchanger. A secondary heat exchanger may be used to heat the gaseous stream with exhaust gas from the internal combustion engine. Blow-by gases are cleaned for subsequent discharge to the ambient environment, or for reintroduction to the fuel system of the engine.

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

Abstract: The invention relates to a method for de-oiling crankcase ventilation gases of an internal combustion engine wherein an oil separating element, like a cyclone has crankcase ventilation gases flowing therethrough, and the oil droplets contained therein are separated. The method provides that the volume stream of the crankcase ventilation gases is divided in at least two partial volume streams, and at least one partial volume stream is guided through at least one oil separating element, wherein the magnitude of the at least two partial volume streams is controlled depending on the magnitude of the volume stream. Furthermore the invention relates to apparatus for accomplishing the method.

Abstract: A drive train for an overhead valve engine, including a cam gear driven by the crankshaft, the cam gear supported for rotation in the cylinder block externally of the cylinder head and having a cam lobe mounted thereon for actuating a pair of rocker arms mounted for rotation in the cylinder head, which in turn actuates intake and exhaust valves in the cylinder head. A first lubrication passageway is provided in the crankcase of the engine to communicate oil, pumped from the oil sump by a combination oil pump and governor assembly driven from the crankshaft, to the upper crankshaft bearing. A second lubrication passageway is provided in the crankshaft and communicates oil from the upper crankshaft bearing to the coupling between the crankshaft and the connecting rod.

Abstract: A device to reduce corrosion which occurs in an internal combustion engine during long periods of non-use. Inactivity allows atmospheric moisture to collect on internal engine surfaces producing rust, and in the engine oil producing slug. This invention provides a means of reducing the presence of this moisture by pressurizing the internal engine areas with low humidity air.

Abstract: In a system for lubricating a valve-operating mechanism in an engine including a head cover coupled to an upper end of a cylinder head, and a valve-operating chamber defined between the cylinder head and the head cover. An oil mist transfer means for transferring an oil mist in an oil tank, an oil recovery chamber for recovering the oil accumulated in the valve-operating chamber by suction and a breather chamber into which a blow-by gas is introduced from the valve-operating chamber lead to the valve-operating chamber. In the lubricating system, a gas-liquid separating chamber for separating oil drops from the oil mist fed from the transfer means to guide the oil mist containing no oil drops to the valve-operating chamber is disposed between the transfer means 61 and the valve-operating chamber. Thus, the oil mist containing no oil drops can be supplied to the valve-operating chamber to lubricate the valve-operating mechanism without a resistance.

Abstract: An automatic condensed oil remover for an intercooler of a diesel engine has a flow restrictor that is positioned between the intercooler and the diesel engine, an oil sump in the intercooler, and an oil tube carrying condensed oil from the oil sump to the diesel engine. The flow restrictor creates a pressure drop sufficient to force the oil to flow from the oil sump through the oil tube to the diesel engine.

Abstract: A separator for a closed crank case ventilation system has an upstream located inlet and downstream gas and oil outlets. A plurality of flat plate baffles alternately extend from opposing side walls to form a tortuous path for blow by gasses to separate the oil from the gasses. The separator is located upstream from the crankcase depression regulator such that the pressure differential between the separator and the crankcase is minimal to allow the oil to easily open the check valve and return to the crankcase.

Abstract: Engine-driven portable tools are widely used for different kinds of work where the surrounding conditions are very different. Large variations in temperature can cause problems for the engine, especially during low temperatures that occur during winter. The present invention reduces these problems in a simple and effective way by guiding heated air from the area adjacent to the muffler through a channel placed outside the casing to the air inlet for the engine. The cold air sucked into the engine is mixed with the heated air from the channel so that the temperature of the air mixture is increased.

Abstract: A crankcase ventilation system for a turbocharger internal combustion engine comprises an internal combustion engine having a crankcase and an exhaust stack, a turbocharger for providing a supply of pressurized air to the engine, eductor tubing connected between the crankcase and the exhaust stack for ventilating the crankcase, and a conduit connected between the turbocharger and eductor tubing.

Abstract: A flat panel filter element is provided for a diesel engine crankcase ventilation filter having a flat low profile filter housing extending in a horizontal plane. The flat panel filter element has media, including coalescing media, spanning a horizontal supporting and sealing perimeter border frame and passing flow downwardly therethrough.

Abstract: A centrifuge for cleaning the lubricating oil of an internal combustion engine, which simultaneously cleans the crankcase gases in which the separation result is improved by introducing crankcase gases (dashed arrows) directly, without any shielding baffles, into the oil mist generated by the drive nozzles in the centrifuge housing in order to produce a scrubbing effect, so that the crankcase gases are precleaned. For additional cleaning, guide vanes mounted on the rotor swirl the crankcase gas so that further residues are deposited along the walls of the housing, thereby making further measures to clean the crankcase gases unnecessary, with the result that the apparatus highly economical since it saves both material costs and maintenance costs.

Abstract: A breather is provided for mounting on a cylinder head of a crankcase of an engine in order to separate oil from the crankcase blow-by. The breather includes a rocker cover mounted to the cylinder head of the crankcase. A plate is positioned within a cavity in the rocker cover for separating the cavity into first and second portions. The plate has an opening therein for allowing the crankcase blow-by to flow from the first portion into the second portion of the cavity. An oil separator is disposed in the second portion of the cavity and includes baffles projecting from each side thereof. It is contemplated that the oil in the crankcase blow-by cling to the oil separator and the first and second sets of baffles as the crankcase blow-by flows therepast.

Abstract: A diesel engine crankcase ventilation filter is provided by a flat low profile filter housing extending in a horizontal plane and having an upper planar horizontal surface, a lower planar horizontal surface, and side surfaces extending between the upper and lower surfaces. A planar horizontal flat panel filter element extends parallel to the upper and lower surfaces. The housing has an upper plenum between the flat panel filter element and the upper surface, and a lower plenum between the flat panel filter element and the lower surface, an inlet receiving oil and air from the diesel engine and supplying same along an inlet path to the upper plenum to flow downwardly through the flat panel filter element to the lower plenum, a first outlet outputting air along a first outlet path from the lower plenum, and a second outlet outputting oil along a second outlet path from the lower plenum.

Abstract: A cylinder head for a motorcycle engine includes a lower surface adapted to be coupled to a cylinder, an upper surface adapted to be coupled to a rocker box and defining a plane, and a side connected between the upper surface and the lower surface. The head also includes a breather inlet extending into the upper surface, an intermediate passage extending into the upper surface, and a breather channel connecting the inlet and the intermediate passage, the breather channel lying in a plane that is generally parallel to the plane of the upper surface. The head also includes a breather passage extending into the side of the head and connected to the intermediate passage, the breather passage having a longitudinal axis that is generally parallel to the plane of the upper surface.

Abstract: An oil separating chamber for separating oil contained in blow-by gas is arranged outside a transmission member passage connecting a crank shaft with a cam shaft of a valve system and at an abutting surface between a cylinder block and a cylinder head. Partition walls perpendicular to the abutting surface for dividing the oil separating chamber into a plurality of small subchambers are alternatively arranged at the cylinder block and the cylinder head to form a labyrinth structure. The small subchamber at one end of the plurality of small subchambers is provided with a blow-by gas intake passage communicated with the transmission member passage. The small subchamber at the other end is provided with a blow-by gas exhaust passage for returning blow-by gas to an air cleaner. Each of the small subchambers not provided with the blow-by gas intake passage is provided with an oil return passage communicating with the transmission member passage.

Abstract: A breathing device for a crankcase of an internal combustion engine, having a balancing shaft with mass-balancing weights. The breathing device is arranged in the cylinder head above the charge-cycle valves of the internal combustion engine and has at least one orifice for the inflow of gas, and a gas-guiding space which runs within the balancing shaft and which is connected to an intake system of the internal combustion engine. A space arranged outside the balancing shaft is connected to the crankcase. In order to reduce construction expenditures and to improve the degree of oil separation, at least one orifice is arranged in at least one of the mass-balancing weights. The orifice opens into at least one axially running feed bore connected to at least one oil-discharging radial bore in the mass-balancing weight. The radial bore communicates the space outside the balancing shaft with the gas-guiding space of the balancing shaft.

Abstract: A crankcase breather oil collector serves to capture oil vapor mixed with crankcase blowby gases, and contain the oil vapor to preclude its exiting to the atmosphere and/or collecting on external machinery components. The device basically comprises a canister which communicates with the crankcase of a four stroke reciprocating internal combustion engine by a tube or line. blowby gases and oil vapor mixed therewith are routed to the canister by the tube or line, with the oil vapor cooling and falling out of suspension with the blowby gases to condense and collect as a liquid in the bottom of the canister. The blowby gases then exit the canister through a filtered vent or outlet. The outlet filter serves to preclude significant particulate matter from being expelled to the ambient atmosphere, and also serves to protect the engine by precluding the entrance of airborne contaminants to the engine when the engine is shut down and cools to provide a relatively low pressure within the crankcase.