418results about "Crankcase ventillation" patented technology

Described herein are engine systems, closed crankcase ventilation systems, and hot filter assemblies that are configured to filter out contaminants from the closed crankcase ventilation system prior to being returned to an air intake of the engine system. In some examples, a closed crankcase ventilation system can include an engine comprising a crankcase, an oil separator coupled to the crankcase, and a hot filter assembly coupled to the oil separator and mounted to an exhaust manifold of the engine or a turbine housing of a turbocharger. The hot filter assembly comprises a housing defining a cavity, a gas inlet fluidly coupled between the oil separator and the cavity, a gas outlet fluidly coupled between the cavity and an air intake of the engine, and at least one baffle extending across the cavity and defining a first and second gas pathways on opposite sides of the baffle.

The utility model discloses an oil-gas separation mechanism and an engine, the oil-gas separation mechanism comprises an air inlet cam shaft, a chain wheel, a centrifugal separation disc and a breather pipe, and the air inlet cam shaft is provided with a first channel penetrating through the two ends of the air inlet cam shaft; the chain wheel is meshed with a timing chain of an engine and used for driving the air inlet cam shaft to rotate. The centrifugal separation disc is connected with one end of the air inlet cam shaft and provided with a separation cavity, the separation cavity communicates with the first channel, fan blades are arranged in the separation cavity, the centrifugal separation disc rotates to suck mixed oil gas into the separation cavity, and the fan blades guide gas into the first channel and throw engine oil out of the separation cavity. The breather pipe communicates with the end, away from the centrifugal separation disc, of the first channel and is used for exhausting gas in the first channel. According to the oil-gas separation mechanism, the oil-gas separation structure can be arranged on the air inlet cam shaft, the space occupied by the oil-gas separation structure in an engine is reduced, the internal structure of the engine is simplified, and the manufacturing difficulty and manufacturing cost of the engine are reduced.

A first passage communicating a portion downstream side of the compressor in the intake passage and an upstream side of the intercooler with the crankcase, a second passage communicating a portion downstream of the intercooler in the intake passage with the crankcase, and a third passage communicating a portion upstream of the compressor in the intake passage with the crankcase are installed in the turbocharged engine, and a switching valve for switching between a state in which the first passage communicates and the second passage is blocked, and a state in which the first passage is blocked and the second passage communicates is provided.

The application discloses a hydrogen engine crankcase hydrogen concentration control method, and relates to the field of hydrogen engines, which comprises the following steps: placing a hydrogen engine on a test bench to test, obtaining a target hydrogen concentration, an actually measured hydrogen concentration and a crankcase blow-by amount; calculating a target working condition supplementary air amount according to the target hydrogen concentration, the actually measured hydrogen concentration and the crankcase blow-by amount; generating a full working condition supplementary air amount database according to the target working condition supplementary air amount, based on the rotating speed and the load of different working conditions; obtaining the fresh air amount required to be supplemented by a current target working condition according to the full working condition supplementary air amount database; obtaining an intake air pressure, an intake air temperature and a crankcase pressure; combining the intake air pressure, the intake air temperature and the crankcase pressure to calculate a throttle opening degree; comparing the hydrogen concentration measured by a hydrogen concentration sensor according to the current target working condition with the target hydrogen concentration to obtain a hydrogen concentration deviation; generating a corrected fresh air amount; and performing closed-loop control on the actual crankcase hydrogen concentration by adjusting the throttle opening degree.

The utility model relates to the technical field of automobile accessories, in particular to an automobile valve chamber cover which comprises a cover body, an oil-gas separation cover and a protective buckle cover, an installation area is arranged on the cover body, and a backflow hole and an oil-gas outlet are formed in the installation area. The oil-gas separation cover is buckled on the mounting area and forms an oil-gas cavity and a waste gas transition cavity which are mutually independent, the oil-gas separation cover is provided with a waste gas discharge port and at least one oil-gas inlet, and the oil-gas inlet and the oil-gas outlet are both communicated with the oil-gas cavity; the protection buckle cover is buckled on the oil-gas separation cover, the backflow hole and the waste gas discharging opening are both communicated with the waste gas transition cavity, and a waste gas valve is arranged in the waste gas discharging opening. The automobile valve chamber cover adopts a split design and is convenient to manufacture and low in replacement cost.

The utility model discloses an anti-icing electric heating crankcase ventilation pipe, and relates to the technical field of ventilation pipes, the anti-icing electric heating crankcase ventilation pipe comprises a heating assembly, and the heating assembly is used for heating the ventilation pipe; the protection assembly is compounded on the outer side of the heating assembly, and the protection assembly is used for protecting the heating assembly; the heating assembly comprises a protection assembly and a stabilizing assembly, the stabilizing assembly is arranged on the outer side of the protection assembly and used for improving the stability of the protection assembly, the heating assembly comprises a ventilation pipe, a plurality of mounting grooves are formed in the center of the surface of one side of the ventilation pipe, and the multiple mounting grooves are each provided with an electric heating wire. According to the utility model, the ventilation pipe can be heated, and the stability of the ventilation pipe can be improved, so that the outer surface of the pipeline can be prevented from being damaged, and the service life of the pipeline can be prolonged.

To provide a mounting structure for a valve capable of suppressing the occurrence of rattling in a mounting member for mounting the valve to an internal combustion engine.SOLUTION: The mounting structure includes a mounting member 25 separate from a valve, the mounting member 25 fixed to a separator 12 while covering the valve mounted to the separator 12 of the internal combustion engine, to prevent the removal of the valve from the separator 12, the mounting member 25 having a fixed hole 29 through which a resin protrusion 30 protruded from the separator 12 is inserted when covering the valve, the mounting member 25 fixed to the separator 12 by applying resin caulking to the protrusion 30 inserted through the fixed hole 29. On the inner face of the fixed hole 29, a first face 31 located corresponding to the outer face of the protrusion 30, and a second face 32 linked with the first face 31 and located to be farther away from the center of the fixed hole 29 than the first face 31 are formed.SELECTED DRAWING: Figure 9

The present invention suppresses suction of gas from a suction passage. An internal combustion engine (10) for a vehicle is provided with a cylinder (23A), an intake passage (10A), a crank chamber (10Z), a suction passage (80Z), and an introduction passage (60Z). The intake passage (10A) introduces intake air into the cylinder (23A). The crankshaft chamber (10Z) accommodates a crankshaft (33). In addition, oil is stored in the crank chamber (10Z). The suction passage (80Z) sucks oil stored in the crank chamber (10Z). The introduction passage (60Z) introduces a portion of the intake air flowing through the intake passage (10A) into the crank chamber (10Z). The introduction passage (60Z) includes a main passage (63Z) and a plurality of outlet passages (64Z). The main passage (63Z) extends from the outside of the crank chamber (10Z) to the inside of the crank chamber (10Z). The outlet passage (64Z) discharges intake air flowing through the main passage (63Z). The outlet passage (64Z) extends from the main passage (63Z) toward the suction passage (80Z) when viewed from a direction along the vertical axis of the vehicle.

The inventio discloses a motor operation control method for an oil-gas separator to solve the problem that an existing oil-gas separator control strategy cannot minimize the operating speed under the precondition of satisfying operating requirements. The motor operation control method comprises: acquiring a plurality of groups of actual operating parameters output by a motor in a target operating state, establishing mapping relations according to the parameters, associating the mapping relations, and plotting a relation table; and acquiring a portion of operating parameters of the motor in a current operating state, searching for the mapping relations in the relation table to obtain other parameters, and adjusting corresponding parameter data with the obtained parameters as reference until the motor reaches the target operating state.

A closed crankcase ventilation system for removing blow-by gases, leaking from a combustion chamber, from a crankcase of an internal combustion engine. The system comprises a blow-by line extending between the crankcase and an air intake line of the internal combustion engine. When the engine is running, the air intake line provides a vacuum source for drawing blow-by gases from the crankcase through the blow-by line. A crankcase depression regulator is arranged in the blow-by line for regulating a level of vacuum inside the crankcase. At least one pressure sensor is arranged for measuring a pressure in the blow-by line relative to atmospheric pressure. A control unit is arranged for detecting leakages in the blow-by line by performing a diagnostic test based on a pressure measurement signal from a single pressure sensor.

The invention discloses a crankcase ventilation system, a control method and a vehicle, relates to the technical field of engines, and can reduce engine oil emulsification and improve engine reliability. The crankcase ventilation system comprises a crankcase, the crankcase comprises a crankshaft cavity and an oil storage cavity, and the crankshaft cavity is communicated between an engine air cylinder and the oil storage cavity; the air inlet channel is provided with an air inlet manifold, and the air outlet end of the air inlet manifold communicates with an air inlet valve of the engine. The air inlet end of the first exhaust channel is communicated with the crankshaft cavity, the air outlet end of the first exhaust channel comprises a first sub-end and a second sub-end, and the first sub-end is communicated with the first air inlet end of the air inlet manifold; the air inlet end of the second exhaust channel is communicated with the second sub-end, the air outlet end of the second exhaust channel is communicated with the second air inlet end of the air inlet manifold, the first exhaust channel is provided with a first one-way valve, and the second exhaust channel is provided with a second one-way valve.

The utility model relates to the field of engine parts, in particular to a degassing device for an engine oil cooler of a high-horsepower engine, which comprises an engine oil cooler mounted on a cylinder body, a water pump is mounted at the engine oil cooler, and the cylinder body is provided with a water inlet and a water outlet. A water inlet and a water outlet are formed in the cylinder body, a water inlet pipe and a water outlet pipe are installed on the water inlet and the water outlet respectively, a water inlet header pipe is arranged on the cylinder cover, the cylinder body is communicated with the water inlet header pipe through a degassing pipeline, and a degassing connector is installed on the water inlet header pipe. If the water pump does not build the pressure and the pressure is insufficient, the boiling point of the cooling liquid is reduced, the cooling liquid is easy to boil, more bubbles are generated, vicious circle is formed, local high temperature is possibly caused, and engine parts are damaged.

With its simple structure, it reliably prevents or suppresses the rise in internal pressure of the oil tank. [Solution] The system includes an on / off valve 15 provided between the oil tank 3 and a gas receiving section 10 that receives blow-by gas without leaking it to the outside, and a controller 19 that controls the on / off valve 15. The controller 19 includes a low-pressure determination unit that determines that the pressure inside the oil tank 3 is lower than a predetermined first reference pressure, a determination unit that determines that a predetermined condition other than the pressure inside the oil tank being lower than the first reference pressure has been met, and an opening control unit that opens the on / off valve 15 when the low-pressure determination unit determines that the pressure inside the oil tank is lower than the first reference pressure, or when the determination unit determines that a predetermined condition has been met.

The application discloses a method for controlling the concentration of combustion gas in a crankcase, a device for controlling the concentration of combustion gas in a crankcase, a vehicle and a computer storage medium, wherein the method for controlling the concentration of combustion gas in a crankcase is applied to a vehicle, and the method comprises the following steps: obtaining the current operating condition of an engine and the concentration of hydrogen in the crankcase; adjusting the rotating speed of a centrifugal oil-gas separator according to the operating condition; and when the concentration of hydrogen increases, performing a first step, wherein the first step comprises reducing the torque of the engine. The method for controlling the concentration of combustion gas in a crankcase can keep the volume concentration of hydrogen in the crankcase at a low level.

An engine system is provided with: an engine; the throttle valve is arranged on an air inlet pipe of the engine; an oil tank for storing lubricating oil for the engine; an oil pipe that causes the oil to flow from the oil tank to the engine and causes blow-by gas to flow from the engine to the oil tank; a first blow-by gas pipe that causes the blow-by gas to flow from the tank to the intake pipe downstream of the throttle valve; the pressure sensor is used for detecting the pressure in the oil tank; and a notification control device that, when the amount of deviation of the pressure in the tank detected by the pressure sensor from a normal pressure is equal to or greater than a threshold value, performs notification processing for notifying a user of the occurrence of an abnormality in at least one of the oil pipe and the first blow-by gas pipe.

To excellently ventilate blow-by gas in an oil tank in both of natural intake operation and supercharging operation.SOLUTION: The dry sump supercharged engine 10, which circulates lubricating oil between the engine 10 and the oil tank 30, includes the first circulation passage 34, which connects the portion of the intake passage 17 downstream of the throttle valve 22 to the oil tank 30, the second circulation passage 36, which connects the portion of the intake passage 17 upstream of the compressor 20 to the oil tank 30, the first check valve 35, which is arranged in the first circulation passage 34, and the second check valve 37, which is arranged in the second circulation passage 36.SELECTED DRAWING: Figure 1

An internal combustion engine includes a blow-by gas passage. The internal combustion engine further includes a ventilation case provided at an intermediate position of the blow-by gas passage. The internal combustion engine further includes a positive crankcase ventilation (PCV) valve provided in the blow-by gas passage and attached to the ventilation case. The PCV valve regulates the amount of blow-by gas flowing through the blow-by gas passage. The internal combustion engine further a plate covering the PCV valve and attached to the ventilation case. The internal combustion engine further includes a cover covering the plate and in contact with part of the plate.

The invention relates to an internal combustion engine (1) for a motor vehicle, the internal combustion engine having: a crankcase (2); an intake tract (5) through which air can flow and by means of which the air flowing through the intake tract (5) can be introduced into combustion chambers (4) of the internal combustion engine (1); a compression device (6), which is arranged in the intake tract (5), for compressing the air flowing through the intake tract (5); a crankcase ventilation device (13) by means of which a first gas can be discharged from the crankcase (2) in order to ventilate the crankcase (2); and a tank ventilation device (14) by means of which a second gas can be discharged from a tank (15) in order to ventilate the tank (15). A part-load ventilation branch (16) is provided which is common to the crankcase ventilation device (13) and the tank ventilation device (14). A full-load ventilation branch (17) is provided which is common to the crankcase ventilation device (13) and the tank ventilation device (14).

Apparatuses including a coalescing filter are discussed and shown. The coalescing filter can include a filter media, a central core, a first end cap and a second end cap. The central core can define a central cavity. The central core can be positioned within the filter media. The first end cap can be coupled to the filter media at a first end and can have a plurality of ridges on an opposing side from the central core and the filter media. The plurality of ridges are configured to provide increased rigidity to the first end cap. The second end cap can be coupled to the filter media at a second opposing end from the first end cap.

The utility model provides an oil mist separation device of a medium-speed and high-speed diesel engine, and relates to the technical field of oil mist separation devices. The oil mist separation device of the medium-high speed diesel engine comprises a shell, an air inlet pipe is fixedly connected to the middle of the shell, an air outlet pipe is fixedly installed on one side of the shell, a power mechanism is arranged on the upper portion of the shell, and a plurality of partition plates are arranged on the lower portion of the power mechanism. According to the oil mist separation device of the medium-high speed diesel engine, the power mechanism drives the multiple partition plates to rotate, the partition plates drive oil mist to rotate around the air inlet pipe, when the partition plates move to the collecting box, liquid oil enters the collecting box under the action of gravity and centrifugal force, the liquid oil on the shell and the partition plates is removed, and the oil mist separation effect is improved. And the effect of removing the liquid oil is improved, so that the problems that the existing liquid oil is generally thick, the liquid oil sinks only through gravity, the collection efficiency is too low, the liquid oil is easily attached to an interception component, and the separation effect is influenced are solved.

The utility model discloses a methanol engine and a pneumatic control system thereof and relates to the technical field of engines. The air control system comprises a supercharger, a throttle valve, an anti-surge valve, an air inlet header pipe and a methanol rail pipe. The throttle valve is communicated with the supercharger through a throttle valve air inlet pipe, a supercharging front air inlet pipe is installed on the supercharger, and the anti-surge valve is communicated between the throttle valve air inlet pipe and the supercharging front air inlet pipe through an anti-surge connecting pipe. The air inlet main pipe is communicated with the throttle valve and is communicated with the air cylinder through the air inlet manifold; the methanol rail pipe is communicated with an external methanol supply skid-mounted device, the methanol rail pipe is a normally-opened double-layer pipe, an inner pipe of the methanol rail pipe is a methanol branch pipe, an outer pipe of the methanol rail pipe is an air branch pipe, and the methanol branch pipe is communicated with an air inlet manifold through a methanol sprayer. All-working-condition anti-surge control can be achieved, the reliability of the supercharger is improved, the engine maintenance space is enlarged, and the construction difficulty is reduced. Meanwhile, the utility model discloses a methanol engine.

The utility model discloses a compressor casing, a compressor, a turbocharger and a vehicle. The compressor casing comprises a first casing body and a second casing body. A compressed air inlet channel, a mounting cavity for mounting a compressor wheel and a compressed air outlet channel are arranged in the first shell, and the compressed air inlet channel and the compressed air outlet channel are both communicated with the mounting cavity; the second shell is arranged on the first shell, the second shell is in heat conduction connection with the first shell, a heating air channel is formed in the second shell, an air inlet of the heating air channel is used for being communicated with an oil-gas separator, and an air outlet of the heating air channel is communicated with the compressed air inlet channel. According to the compressor casing, the gas can be coked in the heating gas channel by heating the second casing body, so that the engine oil content in the gas is reduced, and the coking risk of the compressed gas inlet channel, the mounting cavity, the compressed gas outlet channel and the compressor wheel is reduced.

The present application relates to a kind of engine crankcase oil-gas separation structure and engine, and the engine crankcase oil-gas separation structure includes oil-gas separation cavity, oil-gas inflow passage, backflow passage, exhaust passage and air baffle protruding portion, oil-gas separation cavity is extended from the front end to the rear end of engine body at the side of engine body, and located above the crankcase chamber of engine body, oil-gas inflow passage is communicated with the crankcase chamber with one end of oil-gas separation cavity, multiple backflow passages are spaced apart along the extension direction of oil-gas separation cavity, and are communicated with the crankcase chamber of oil-gas separation cavity, exhaust passage is arranged on the top of oil-gas separation cavity with backflow passage staggered, and air baffle protruding portion is arranged on at least one side cavity wall of oil-gas separation cavity.The above-mentioned engine crankcase oil-gas separation structure can realize the effective organization transmission of oil-gas in engine body, and realizes oil-gas pre-separation in transmission path, guarantees the effective reduction of oil content in exhaust gas.

Provided is an internal combustion engine capable of suppressing damage to a supercharger. The internal combustion engine includes: an internal combustion engine main body; a supercharger connected to the internal combustion engine main body; and an intake device connected to the internal combustion engine main body, the intake device having: a first flow path through which fresh gas is introduced to the supercharger; and a second flow path through which blow-by gas from the internal combustion engine main body flows, the second flow path extending adjacent to the first flow path, the second flow path merging with the first flow path from the oblique rear side of the direction in which the fresh gas flows at one end, and a space being provided inside a partition wall that separates the first flow path and the second flow path from each other.

A gaseous fuel internal combustion engine includes: an engine structure including a crankcase and an oil reservoir located below the crankcase; and a ventilation system including a gas pressure source configured to deliver a blow-by gas including a gaseous fuel from the crankcase as an exhaust gas. The ventilation system includes a first oil separator configured to reduce an oil concentration in the exhaust gas. The ventilation system is configured such that, in use, the gas pressure in the crankcase is higher than the gas pressure in the first oil separator. The engine includes a first exhaust conduit arranged to deliver oil removed from the exhaust gas by the first oil separator to the oil reservoir. The first discharge conduit is configured to hold an oil head that exerts a hydrostatic pressure on oil in the oil reservoir for, in use, inhibiting delivery of gas in the crankcase to the oil separator via the first discharge conduit.

Provided is an internal combustion engine. The internal combustion engine is provided with a second separator, a connection pipe, and a pressure sensor. A main chamber inside the second separator is formed in a cylinder head cover, and a first sub chamber and a second sub chamber inside the second separator are formed in a joint portion that is located outside the cylinder head cover. The first sub chamber and the second sub chamber are divided by a partition wall. A communication hole is formed in the partition wall, and the communication hole connects the first sub chamber and the second sub chamber. The first sub chamber is connected to the main chamber via a throttle portion. The joint portion is provided with a first connection port and a second connection port. The first connection port is connected to the first sub chamber, and the second connection port is connected to the second sub chamber. The first connection port is connected to an intake passage via the connection pipe. The second connection port is connected to the pressure sensor.

Disclosed is a rotor (121) for a centrifugal breather for an air / oil mixture of a turbomachine, this rotor comprising: a hollow shaft (114) extending along an axis (X), a pinion (115) for rotating the hollow shaft (114), this pinion (115) extending around the axis (X) and being formed of a single part and in a first material with at least one first portion (114a) of the hollow shaft (114), and an annular structure (117) extending around the axis (X) and constrained to rotate with the shaft (114), this structure (117) being produced in a second material, different from the first material, characterised in that said structure (117) is made integral with the shaft (114) by additive manufacturing of this structure directly on at least one annular surface (122) of the pinion (115) which forms at least one annular support surface for this additive manufacturing.

A hydraulically driven de-oiler for gas turbine engines including a lubricant pumping section operatively coupled with a fuel impelling section, the lubricant pumping section and the fuel impelling section being divided by a lubricant to fuel divider; a helical sinus formed within the lubricant pumping section, the helical sinus configured to pump at least one of lubricant, and lubricant mist from a de-oiler tank inlet to a de-oiler tank outlet and configured to pump the air to a de-oiler air vent outlet in the absence of lubricant; and the fuel impelling section fluidly coupled with a fuel inlet and a fuel outlet, the fuel impelling section comprising impellers configured to receive a fluid flow of fuel and translate a flow energy from the fluid flow into a mechanical rotational energy and impart the mechanical rotational energy into the de-oiler.