Abstract: Operating a gaseous fuel engine system includes controlling at least one of a delivery location, a delivery timing, or in situ mixing of a gaseous fuel with air, based on at least one engine system parameter upon the basis of which a blowby amount of a gaseous fuel to a crankcase varies. Crankcase accumulation of the gaseous fuel is maintained below a flammability limit. Related apparatus and control logic is also disclosed.

Abstract: An oil separator for an internal combustion engine includes a case and a separation wall. The case includes inflow ports into which blow-by gas flows, a gas outflow port, and an oil discharge port. An inside of the case is divided by the separation wall into an upstream passage and a downstream passage. The downstream passage is located on the upper side of the upstream passage. The inflow ports and the oil discharge port are connected to the upstream passage. The gas outflow port is connected to the downstream passage. The inflow ports and the oil discharge port are arranged in a direction intersecting the vertical direction. The separation wall includes one connection passage that connects the upstream passage to the downstream passage on the upper side of the oil discharge port. The separation wall is located on the upper side of the inflow ports.

Abstract: The application relates to a separation assembly with multiple separators and a single jet pump assembly. A separation assembly comprises a first crankcase ventilation separator comprises a first drain outlet, a second crankcase ventilation separator that comprises a second drain outlet, and a jet pump assembly. The jet pump assembly comprises a first drain inlet fluidly connected to the first drain outlet of the first crankcase ventilation separator and a second drain inlet fluidly connected to the second drain outlet of the second crankcase ventilation separator. The jet pump assembly provides suction pressure to both the first drain outlet of the first crankcase ventilation separator and the second drain outlet of the second crankcase ventilation separator.

Abstract: A blow-by gas treatment apparatus for an internal combustion engine mounted on a vehicle includes a blow-by gas pipe having a downward facing outlet portion opened to atmosphere, and a collection container into which the outlet portion is inserted and which is configured to collect oil discharged from the outlet portion. The collection container includes an upper end opening portion formed at an upper end of the collection container and into which the outlet portion of the blow-by gas pipe is inserted from above, a discharge hole formed in an upper portion of a rear surface portion of the collection container, the rear surface portion being located on a rear side in a vehicle length direction, and a cutout portion formed at an upper portion of a side surface portion of the collection container, the side surface portion being located on an outer side in a vehicle width direction.

Abstract: A vent insert is disclosed for use with an automotive turbocharger system. The vent has a substantially cylindrical hollow tube with a first end for seating the vent and a second open end. The first end has a rim around an opening. The second end of the vent has an angled opening that faces away from the direction of the gas flow when the vent insert is operating within the turbocharger system. There are a plurality of protrusions extending outward from the outside surface of the vent to assist in keeping the vent insert in place in the turbocharger system.

Abstract: This breather device separates engine oil included in a blow-by gas. The breather device comprises a first route, an acceleration route, a branching route, and turn-back routes. The blow-by gas flows to the first route. The acceleration route is connected to a downstream side of the first route, and has a flow channel cross-sectional area smaller than that of the first route. The branching route is connected to a downstream side of the acceleration route, configured including a wall part orthogonal to the acceleration route, and branched into two routes by the wall part. The turn-back routes are connected to one route branching at the branching route, and are turned back so as to be parallel to the acceleration route and to head in the opposite direction from a progressing direction.

Abstract: A set including a filter candle for separating a compressed gas and a disperse phase present therein, and a bottom cap placed on a lower side of the filter candle. The filter candle contains a filter medium containing a coalescence medium for coalescing the disperse phase and a drainage medium for draining the coalesced disperse phase in a downward direction to the bottom cap, where at least one drainage opening is provided in the bottom cap at a position corresponding to the drainage medium for discharging coalesced liquid from the drainage medium. A side of the bottom cap facing away from the filter medium is provided with a drip-off position and with at least one drainage profile which extends from the at least one drainage opening, where the drainage profile is provided for discharging the coalesced disperse phase from the at least one draining opening to the drip-off position.

Abstract: Systems and methods for engine coalescer exhaust extraction are provided. In one embodiment, a system comprises an engine including a crankcase fluidly coupled to a coalescer, a muffler adapted to receive combustion exhaust gases from the engine, and a coalescer exhaust passage fluidly coupling the coalescer to the muffler. The coalescer exhaust passage includes an inlet arranged upstream of the muffler adapted to flow a motive fluid to the coalescer exhaust passage to increase a flow speed of coalescer exhaust through the coalescer exhaust passage.

Abstract: A sensor with a mechanical waveguide may be characterized using test ultrasonic signals to generate a baseline signature, and the baseline signature may later be used to detect faults in the sensor.

Abstract: A gas-liquid separator includes a housing. The housing includes an inlet structured to receive a blowby gas stream from a crankcase. a cleaned air outlet, and a liquid outlet. A cover is disposed downstream from the inlet and upstream from the liquid outlet. The cover includes a baffle disposed over the blowby gas stream flow path from the inlet. The blowby gas stream impacts the baffle and separates liquid and aerosol contained in the blowby gas stream. A flange extends substantially axially downward from a side of the baffle. The flange is tapered substantially axially downward forming an inner surface. The inner surface is structured to route the separated liquid toward the liquid outlet. The inner surface biases separated liquid away from shedding toward the cleaned air outlet.

Abstract: An abnormality determination device of an internal combustion engine in which a breather line connects an intake-air path positioned upstream from a forced-induction system and a crankcase includes an intake-air flow rate sensor that detects an intake air flow rate in the intake-air path, a pressure sensor that detects a pressure of the breather line, and an abnormality determination unit that determines abnormality of the breather line. The abnormality determination unit estimates an intake air resistance of the intake-air path from the pressure when the engine is under low load conditions under which the intake air flow rate is less than a predetermined value and the pressure when the engine is under high load conditions under which the intake air flow rate is the predetermined value or greater and determines abnormality of the breather line when the intake air resistance is less than a threshold.

Abstract: The invention relates to an oil decantation system (1) comprising: (i) a separator device (6) designed to trap the oil droplets (107) that are present in a flow of a blow-by gas (110); and (ii) a jet pump (5) positioned upstream of the separator device (6) and designed to accelerate and draw the flow of the blow-by gas (110) before it enters said separator device (6).

Abstract: A centrifugal separator for separating blow-by gases into cleaned air and liquid for recirculation through an engine.

Abstract: A piston internal combustion engine with generator has two cylinders and cylinder heads and pistons with connecting rods and two crankshafts which are connected by gears with a ratio of 1:?1 (with opposite direction of rotation). The first crankshaft with the gear is mounted parallel to the second crankshaft with the second gear in one engine case such, that the gears engage. The first crankshaft is coupled to the first generator rotor and the second crankshaft is coupled to the second generator rotor or the flywheel. The moment of inertia of the first crankshaft assembly with the first gear and the first generator rotor is equal to the moment of inertia of the second crankshaft assembly with the second gear and the second generator rotor or flywheel. The cylinders with the pistons and are positioned perpendicularly to the plane of symmetry between the crankshafts, with the axes of the pair of cylinders lying in a plane with the both pistons being at the top dead center simultaneously.

Abstract: An oil separator separates oil from aerosol in a combustion engine. The oil separator includes a housing having an inlet opening for the aerosol, an impeller which can be rotatably driven about a rotational axis, and which is adapted for generating an aerosol flow along an axial direction of the impeller and arranged in the housing, and an impact wall which is designed in such a way that a projection of the impeller oriented axially and downstream in the air flow impinges on the impact wall. At least one part of a projection of the impeller oriented axially and downstream in the air flow impinges on the inlet opening.

Abstract: A multi-chamber wobble plate pump that includes a housing with an inlet port, an outlet port and a plurality of pump chambers. The pump includes inlet valves having an asymmetric cross-section with a thin section and/or a peripheral seal bead. A wobble plate is coupled to a diaphragm and a plurality of pistons. Rotation of the wobble plate moves the pistons within the pump chambers to draw in and force fluid out of the chambers. The diaphragm may have a thin cross-sectional area that creates a hinge. The pump may further have a pulsation damper and a flexible liner located in-line with an outward flow of fluid and which absorb pressure transients and reduce noise. The pulsation dampener may be integrated into the relief valve. An elastomeric sleeve may be located adjacent to the wobble plate to provide both a seal and a noise absorber.

Abstract: Various embodiments may include a method for checking the plausibility of the functionality of a crankcase ventilation system of an internal combustion engine, wherein crankcase ventilation system has a crankcase, an intake tract equipped with an intake manifold, and a connecting line arranged between the crankcase and the intake manifold, the method comprising: detecting an occurrence of a negative load change; in response, comparing a measured intake manifold pressure with a modelled intake manifold pressure using acquired operating variables of the internal combustion engine and of a crankcase model; and determining on the basis of the comparison result whether the connecting line arranged between the crankcase and the intake manifold becomes blocked or drops out.

Abstract: A method for ventilating a crankcase of an internal combustion engine using natural gas as a fuel source may include filtering ambient air through an air filter. The method may also include heating the filtered ambient air by a jacket heat exchanger. The method may further include directing the heated ambient air through an inlet of the crankcase to purge blow-by gases including natural gas from the crankcase.

Abstract: A blow-by gas treatment device includes a first blow-by gas pipe, a second blow-by gas pipe, a first pipe joint located on a first head cover, the first blow-by gas pipe being connected to the first pipe joint, a second pipe joint located on a second head cover, the second blow-by gas pipe being connected to the second pipe joint, a first union located on the first pipe joint, a second union located on the second pipe joint, and a pressure sensor connected to the first pipe joint by the first union and connected to the second pipe joint by the second union.

Abstract: Methods and systems are provided for diagnosing a positive crankcase ventilation (PCV) system. In one example, a PCV system diagnostic method is provided that includes a determining a fault condition in a positive crankcase ventilation (PCV) system by comparing a pressure sampled from a pressure sensor positioned on a clean side of an oil separator coupled to a crankcase with a modeled pressure representing an expected pressure on the clean side of the oil separator.

Abstract: A system and method for improving hydrocarbon fuel, such as diesel, particularly after contamination in underground storage tanks with other fuels such as gasoline, etc. High-gravity hydrocarbons present in diesel and/or water are removed via aeration of the (out-of-specification/contaminated) diesel. The removal of unwanted hydrocarbons and other contaminants can be accomplished in a number of fashions, including pumped air, exposure of the line, drawing of air into the line, etc. After removal from the diesel line, high-gravity hydrocarbons can be isolated and recycled or re-used, for instance to power the system. Following the conditioning, the diesel may be returned into specification for dispensation at a commercial or retail fuel center for use in vehicles and diesel combustion engines. The system and process may be portable and/or conducted locally at the site of an underground storage tank.

Abstract: The oil mist separator separates oil from blow-by gas which flows through a gas flow passage. A chamber, which is partitioned from the gas flow passage including a gas introduction port, is provided between a cylinder head cover and a baffle plate. A first guide wall, which extends with a downward inclination toward the chamber so as to cover the gas introduction port and the chamber, is provided above the gas introduction port and the chamber. A drain hole for discharging the oil within the chamber is formed in the baffle plate.

Abstract: Systems and methods (e.g., a method for controlling and/or operating a compressor) are provided that includes the steps of monitoring a crankcase pressure of a first compressor; analyzing the monitored crankcase pressure that includes calculating an average of the crankcase pressure over a time period and comparing the average of the crankcase pressure over the time period to a nominal crankcase average pressure; identifying a condition of the first compressor based on the analysis of the monitored crankcase pressure; and adjusting operation of a second compressor to compensate for the first compressor in response to identifying the condition of the first compressor based on the analysis of the monitored crankcase pressure. (The method may be carried out automatically or otherwise by a controller).

Abstract: A cam carrier includes a pair of longitudinal frames provided parallel to an axial direction of a camshaft and a plurality of transversal frames connected to the pair of longitudinal frames to be spaced from each other and supporting the camshaft via cam bearings. A flexible structure suppressing amounts of change in a relative position and an inclined angle of the cam bearings relative to the camshaft due to a thermal expansion is provided on at least one of wall surfaces of the longitudinal frames, the wall surfaces being located between adjacent transversal frames.

Abstract: A blow-by gas purge apparatus includes: a positive crankcase ventilation (PCV) valve disposed on a cylinder head; a head passage penetrating on the cylinder head to communicate with a discharge side of the PCV valve; and a port adaptor interposed between the cylinder head and an intake manifold. The port adaptor includes: multiple intake communication holes such that each intake runner of the intake manifold communicates with each intake port of the cylinder head; an inlet hole communicating with the head passage; and a distribution passage dividing and supplying blow-by gases introduced through the inlet hole into the multiple intake communication holes.

Abstract: A vent insert is disclosed for use with an automotive turbocharger system. The vent has a substantially cylindrical hollow tube with a first end for seating the vent and a second open end. The first end has a rim around an opening. The second end of the vent has an angled opening that faces away from the direction of the gas flow when the vent insert is operating within the turbocharger system. There are a plurality of protrusions extending outward from the outside surface of the vent to assist in keeping the vent insert in place in the turbocharger system.

Abstract: First and second oil chambers arranged in a cylinder arrangement direction with a partition wall interposed therebetween are formed in a cylinder block. A cylinder head includes first and second communication passages respectively connected to the first and second oil chambers. The communication passages are configured so that a resistance generated when gas is caused to flow from the first oil chamber to a space above the head through the first communication passage is smaller than a resistance generated when gas is caused to flow from the second oil chamber to the space above the head through the second communication passage. The cylinder block includes an oil passage connected to both the oil chambers. The partition wall includes a connection hole for allowing the first and second oil chambers to communicate with each other.

Abstract: Provided is a PCV valve assembly that includes a fluidic geometry that allows for the flow of combustion fluid/gas to flow between an inlet and an outlet and switch between two modes of operation, (i) a radial or high flow mode, and (ii) a tangential or low flow mode, as dictated during the operation of the engine. At low vacuums, the fluidic equipped PCV valve assembly has been tuned to operate in the radial mode producing high flow rates due to low flow resistance. As vacuum increases, the PCV valve assembly is tuned to automatically switch modes. This may be enabled due to the shape of the fluidic geometry and the bypass channel which is adapted to vary the amount of flow between a first and a second control ports. The bypass channel allows the geometric fluidic pattern to switch between the high flow mode and the low flow mode.

Abstract: A method is provided for detecting a leak in a crankcase breather of an internal combustion engine, in which a cavity of a crankcase is connected in a gas conducting manner to a fresh air section of the internal combustion engine. A pressure sensor is provided for measuring a pressure in the cavity. An electronic control unit is provided for evaluating the signals of the pressure sensor. The method includes: measuring of a gas pressure by way of the pressure sensor in the crankcase breather system at a defined rotational speed and load of the internal combustion engine, comparing an actual pressure value with a setpoint pressure value, detecting a leak if the setpoint pressure value is exceeded. As a result of the method, an air flow meter can be dispensed with and a satisfactory separation effect is produced between a satisfactory system and a defective system.

Abstract: A leakage detection device for detecting leakage in a positive crankcase ventilation (PCV) passage having at least a scavenging line and a fresh air line includes: a first pressure measurement unit that measures a pressure in the PCV passage; a leakage detection valve that opens and closes the fresh air line; a PCV valve that adjusts a flow rate of blow-by gas; a second pressure measurement unit that measures a pressure in the intake passage; a first valve controller that controls the leakage detection valve when a leakage diagnostic condition is satisfied; a second valve control unit that reduces an opening degree of the PCV valve, and suppresses a flow rate in the PCV passage based on the pressure in the intake manifold after the leakage detection valve is closed; and a leakage determination unit that determines whether leakage occurs based on the pressure in the PCV passage.

Abstract: The object of the invention is to provide a cylinder head cover which comprises an integrated valve device and is easy to produce. To achieve this object, according to the invention the cylinder head cover comprises the following: a cover body which, when the cylinder head cover is mounted, is arranged on an engine block of the internal combustion engine and covers a cylinder head of the internal combustion engine; a valve device comprising a valve body and a main body for receiving the valve body, the main body of the valve device being secured to an inner face of the cover body by means of a weld joint.

Abstract: A filter element comprising a filter media and an outer surface. The filter media is formed in a closed loop, the closed loop defining a hollow interior extending along a longitudinal axis between a first end of the filter media and a second end of the filter media. The outer surface surrounds a perimeter of the filter element and is defined by a substantially circular first portion and at least one second portion. The first portion is substantially circular at a selected height of the filter media, and the at least one second portion is depressed relative to a circle defined by the substantially circular first portion at the selected height.

Abstract: A lubrication structure for an internal combustion engine includes a crankcase, an oil pump, and a relief valve. The crankcase is configured by connecting an upper crankcase on a mating surface of a lower crankcase, and has an oil pan. The oil pump and the relief valve are installed in the lower crankcase. The oil pump sucks oil in the oil pan through a suction passage, and discharges the oil into a discharge passage. The relief valve performs a valve-opening operation according to pressure of oil in the discharge passage to return surplus oil in the discharge passage to the suction passage through a surplus passage. These passages are formed in the lower crankcase. A relief valve housing section housing the relief valve, and the surplus passage allowing the relief valve housing section and the suction passage to communicate with each other, are provided to communicate with the mating surface.

Abstract: Provided is a PCV valve assembly that includes a fluidic geometry that allows for the flow of combustion fluid/gas to flow between an inlet and an outlet and switch between two modes of operation, (i) a radial or high flow mode, and (ii) a tangential or low flow mode, as dictated during the operation of the engine. At low vacuums, the fluidic equipped PCV valve assembly has been tuned to operate in the radial mode producing high flow rates due to low flow resistance. As vacuum increases, the PCV valve assembly is tuned to automatically switch modes. This may be enabled due to the shape of the fluidic geometry and the bypass channel which is adapted to vary the amount of flow between a first and a second control ports. The bypass channel allows the geometric fluidic pattern to switch between the high flow mode and the low flow mode.

Abstract: An oil separator includes: an oil separator main body that is formed with a gas flow path between a gas introduction port that introduces blow-by gas and a gas discharge port that discharges the blow-by gas; a flap that opens and closes the gas flow path, and that includes a substantially circular shaped valve section including a straight line portion of a substantially straight line shape at a portion of an outer periphery of the valve section; and a first impact wall for capturing oil, that is provided along the outer periphery of the valve section at a downstream side of the valve section in the gas flow path, that includes a straight line portion of a substantially straight line shape along the straight line portion of the valve section, and that is impacted by the blow-by gas flowing out from a peripheral edge of the valve section.

Abstract: The present invention provides a process for reducing abnormal combustion within a combustion chamber of the engine. The process can include simulation of the piston-driven internal combustion engine with oil droplets from the crankcase entering into the combustion chamber. In addition, the oil drops entering into the combustion chamber can be simulated as hot spots, as can simulation of fuel combustion within the combustion chamber. A probability of pre-ignition for at least a portion of the simulated hot spots as a function of the simulated fuel combustion and the simulated hot spots within the combustion chamber can be calculated and based on the calculation a combustion chamber parameter can be altered such that pre-ignition within the combustion chamber is reduced.

Abstract: A support structure for a crankshaft includes a crankshaft that is rotatably supported on a cylinder block of an internal combustion engine and has an end portion protruding from the cylinder block, a sprocket that is attached on the end portion protruding from the cylinder block and is connected to a cam shaft, a pulley that is attached on the end portion on an opposite side from the sprocket with respect to the cylinder block and is connected to an auxiliary apparatus, and an end bearing that rotatably supports the end portion relative to the cylinder block and is provided on the end portion between the sprocket and the pulley.

Abstract: A device for cleaning a contaminated crankcase gas generated during operation of an internal combustion engine is provided. An internal combustion engine including such a device is also provided. The device permits for an increased flexibility as to constructing the cleaning device while maintaining or possibly improving cleaning of the contaminated crankcase gas.

Abstract: A clean-side oil and air separator includes (i) a first housing including a filter material; (ii) a second housing including a threaded portion adapted to be a direct replacement for an engine oil fill cap removably closing an oil engine fill port; and (iii) a coupler disposed between and removably coupling the first housing and the second housing; wherein the first housing, second housing, and coupler include a continuous fluid pathway therethrough that extends between (a) an air intake from a PCV valve and (b) the engine oil fill port; and wherein the filter material is disposed in said fluid pathway within said first housing.

Abstract: An oil separator includes: a collecting member that collects an oil mist included in blow-by gas of an internal combustion engine; and an oil separator portion inside which the collecting member is disposed, in which the collecting member includes a plurality of wire net members stacked along a flow direction of the blow-by gas.

Abstract: A crankcase ventilation system, preferably for an engine capable of operation in roll-over situations and/or in steeply oblique positions, and/or for permitting such operation. The crankcase ventilation system includes a crankcase, preferably at least one extraction point for blow-by, and at least one blow-by separator a blow-by separation container. The at least one blow-by separator and the blow-by separation container are connected to one another.

Abstract: A high pressure charge air feed arrangement for an internal combustion engine is provided. The arrangement includes an intake having a high pressure output, a rocker cover having an intake runner defining a high pressure charge flow path, and a gas and oil separator having a flow accelerator with input and output sides. The high pressure output of the intake is attached to one end of the path and the accelerator is attached to the other end. The path is connected between the input and output sides of the accelerator. The separator includes upper and lower plenums divided by a wall having an oil and gas diffuser. The input side is connected to the lower plenum and the output side is connected to a crankcase oil return line. The flow accelerator may be any type of fluid accelerator, including, but not limited to, a venturi pump and a jet pump.

Abstract: A separator unit of an oil mist separator comprises a front unit including a perforated plate and a plurality of holding studs extending rearward from the perforated plate, a rear unit placed behind the perforated plate and including a base plate that is to be intimately put on a rear surface of the perforated plate and has an opening sized to permit insertion of the holding studs of the front unit, a plurality of connecting studs extending rearward from the base plate and an impinge plate held by leading ends of the connecting studs, and a fiber material piece put on the impinge plate, wherein when the front unit is coupled with the rear unit having the holding studs inserted through the opening of the base plate, the fiber material piece is sandwiched between the leading ends of the holding studs and the impinge plate.

Abstract: A blow-by gas returning (BGV) apparatus includes a blow-by gas storage unit, a throttle device placed in an intake passage, a BGV passage for allowing blow-by gas to flow to the intake passage downstream of the throttle device for recirculation, and a PCV valve for regulating a flow rate of blow-by gas. An abnormality diagnosis device includes an air flow meter to detect an intake amount in the intake passage upstream of the throttle device and an electronic control unit (ECU) for diagnosis. The ECU controls the PCV valve to a first opening degree and a second opening degree when an engine is during deceleration fuel cut, and diagnoses abnormality of the BGV apparatus based on a first intake amount detected under control with the first opening degree and a second intake amount detected under control with the second opening degree.

Abstract: A crankcase ventilation system having a crankcase ventilation filter and a filter drain. The crankcase ventilation filter vents blow-by gases from a crankcase and separates oil from the blow-by gases. The crankcase ventilation filter drain collects oil separated by the crankcase ventilation filter and returns the separated oil to the crankcase or another component of the engine. A nozzle is coupled to a pressurized oil supply and directs an oil jet into a mixing bore of the system, which draws the oil back into recirculation. A valve is coupled to the filter drain and is configured to prevent collected oil from reentering the crankcase ventilation filter through an opening that connects the filter drain to the filter.

Abstract: A breather chamber for an internal combustion engine wherein the breather chamber has a large size that is formed while an increase in the size of the internal combustion engine is suppressed. The breather chamber of an internal combustion engine includes looped cam chains for transmitting the power of a horizontally disposed crankshaft to camshafts provided in cylinder heads and includes cam chain chambers disposed alongside portions of cylinder block portions which intersect the direction of the crankshaft. The breather chamber is located on a side of a plane formed by a rotation locus of the cam chain in the direction of the crankshaft in the cam chain chamber.

Abstract: An engine block, an engine sub-assembly, and method for providing and manufacturing an engine block. The engine block includes a plurality of cylinder barrels positioned in the engine block, at least one oil jacket channel formed in the engine block, and an oil inlet port positioned in a peripheral wall of the engine block and connected to the at least one oil jacket channel. The at least one oil jacket channel includes a plurality of curved channel sections. Each curved channel section in the plurality of curved channel sections extends about at least a portion of a circumferential portion of a respective cylinder barrel in the plurality of cylinder barrels. The at least one oil jacket channel extends between adjacent cylinder barrels of the plurality of cylinder barrels in the engine block.

Abstract: The invention relates to a cover assembly for covering of a cylinder head with a lid, a frame and at least one air-oil separator, as well as the use of such a cover assembly as an enclosure for at least one cylinder head of a combustion engine of a vehicle or a combustion engine for stationary use.

Abstract: A vibration-type oil separator includes a housing having a blow-by gas entering path through which a blow-by gas enters, an oil-discharging path which discharges an oil separated from the blow-by gas to outside, and a gas-discharging path which discharges a gas obtained by separating the oil from the blow-by gas to the outside. A vibration cylinder has an orifice formed thereon for escaping the gas and generating vibration by a back pressure of the blow-by gas and an external force applied to the housing to separate the oil and the blow-by gas. A fixing rod fixes the vibration cylinder in an internal space of the housing, in which both side portions thereof are fixed to the housing and a central portion thereof is fixed to the vibration cylinder.

Abstract: A method of and an arrangement for improving the lubrication system of a propulsion device of a marine vessel are specifically applicable in removing water from the lubrication oil of various types of thrusters. An inert gas is arranged from an inert gas source to flow through a gas cavity in the lubrication system for flushing moist gas from the cavity.