1011results about "Crankcase ventillation" patented technology

A centrifugal separator (100) for crankcase gas is disclosed, comprising a separator housing (110), defining a separation space (120), and a plurality of separation members (132) rotatably arranged in the separation space. A first gas passage (141) and a second gas passage (142) extend through the separator housing to guide a flow of the gas through the separation members to allow at least some of the contaminants to be separated from the flow of gas. Further, the separator comprises a sensor housing (155) and a sensor arrangement (150), wherein the sensor arrangement is arranged in the sensor housing and operable to generate a sensor output indicative of a pressure in the first gas passage and a pressure in the second gas passage, and / or a difference between a pressure in the first gas passage and a pressure in the second gas passage.

Apparatuses including coalescing filter are discussed and shown. The coalescing filter can optionally include: a filter media; a central core defining a central cavity, the central core positioned within the filter media; a first end cap; a coupling assembly attached to and extending outward from the first end cap, wherein the coupling assembly is configured to couple with a housing to position the coalescing filter within the housing; and a second end cap opposing the first end cap.

Apparatuses, systems and methods are disclosed for separating oil from a blow-by gas of an engine. An example includes a method that includes passing the blow-by gas to a first oil separating apparatus and a second oil separating apparatus, wherein the first oil separating apparatus and the second oil separating apparatus are physically coupled together along interfacing surfaces and in fluid communication with one another as an array, separating the blow-by gas by passing the blow-by gas through respective filters of the first oil separating apparatus and the second oil separating apparatus, removing the oil from the blow-by gas with the respective filters and recombining the blow-by gas after passing from the respective filters; passing the blow-by gas as a single flow stream from the first oil separating apparatus and the second oil separating apparatus.

The invention discloses a crankcase air supply system, a crankcase air supply control method, a controller and a vehicle, and relates to the field of hydrogen internal combustion engines. The crankcase air supply system comprises a first air supply pipeline communicating with an air outlet of a supercharger and a first end of a four-way valve, and a second air supply pipeline communicating with an air outlet of a pressurized air storage tank and a second end of the four-way valve; the air outlet of the air filter of the hydrogen internal combustion engine is communicated with the third end of the four-way valve, the four-way valve is communicated with the air supply port of the crankcase, and when the hydrogen internal combustion engine is in a high-load and high-moisture state, the opening degree of the first flow adjusting valve is controlled to be larger than that of the second flow adjusting valve. The opening degree of the second flow adjusting valve is larger than that of the third flow adjusting valve. The method is implemented on the basis of the supercharger, the pressurized gas storage tank and the air filter, and the opening degree of each flow regulating valve is regulated, so that the inlet gas water content is reduced while the gas supplementing requirement of the crankcase is met, and the aim of improving the operation reliability of the hydrogen internal combustion engine is achieved.

A centrifugal separator for cleaning gas containing contaminants includes a stationary casing, enclosing a separation space through which a gas flow is permitted, a gas inlet extending through the stationary casing and permitting supply of the gas to be cleaned, a rotating member including a plurality of separation members arranged in the separation space and being arranged to rotate around an axis of rotation. The separator includes a gas outlet arranged in the stationary casing and configured to permit discharge of cleaned gas and including an outlet opening through a wall of the stationary casing, a drainage outlet arranged in the stationary casing and configured to permit discharge of liquid contaminants separated from the gas to be cleaned. The separator includes a turbine casing in which a turbine wheel that is drivingly connected to the rotating member is arranged; and a nozzle arranged for directing a jet of pressurized liquid towards the turbine wheel, thereby rotating said turbine wheel. The turbine casing includes a turbine outlet for drainage of the liquid used for rotating said turbine wheel. The turbine casing has a geometry such that the liquid used for rotating said turbine wheel is leaving said turbine outlet with a remaining kinetic energy that is higher than the energy obtained from gravity alone.

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 invention relates to a drive unit (1) for a motor vehicle, comprising an internal combustion engine (2) which has a crankcase (3) and a crankshaft (20) rotatably mounted on the crankcase (3) and at least partially located within the crankcase (3), via which torques for driving the motor vehicle can be provided by the internal combustion engine (2). A separator (21) is provided, which has a line (22) through which a liquid mixture containing oil and water mixed with the oil can flow. A centrifugal separator (23) is also provided, which can be supplied with the mixture flowing through the line (22) and by means of which the oil can be separated from the water.

The invention relates to a crankcase forced ventilation system and a control method thereof, a supercharged engine and a vehicle, and belongs to the technical field of engines. The crankcase forced ventilation system comprises an air inlet system of an engine, a first ventilation pipeline and a second ventilation pipeline, the air inlet system comprises an air filter, a supercharger, a throttle valve and an air inlet manifold which are sequentially communicated through pipelines, the air inlet system is communicated with an air cylinder of the engine through the air inlet manifold, and the first end of the first ventilation pipeline is communicated with a crankcase; the first ventilation pipeline is provided with a first crankcase forced ventilation PCV valve, the second ventilation pipeline is provided with a second crankcase forced ventilation PCV valve, the first end of the second ventilation pipeline is communicated with the crankcase, the second end of the second ventilation pipeline is communicated with a pipeline connected between the supercharger and the air filter, and the second ventilation pipeline is provided with a vacuum pump. When the engine is in various working conditions, waste gas in the crankcase can be smoothly circulated while the pressure in the crankcase is small.

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.

The utility model discloses an air cylinder assembly with a crankshaft cavity exhaust channel and an engine, and relates to the technical field of engines. Comprising a cylinder block body, and a plurality of crankshaft cavities communicating side by side are formed in the cylinder block body; a main blow-by channel is formed in the front end of the cylinder block body, and an auxiliary blow-by channel is formed in the rear end of the cylinder block body. A front-end air communicating hole is formed in the position, close to the front end of the air cylinder body, of the first crankshaft cavity and can communicate with the main air communicating channel. A rear-end blow-by hole is formed in the tail crankshaft cavity close to the rear end of the cylinder block body and can be communicated with the auxiliary blow-by channel; one path of oil gas in the crankshaft cavity is discharged to the oil-gas separator gas taking hole through the main blow-by channel via the front-end blow-by hole, and the other path of oil gas is discharged to the oil-gas separator gas taking hole through the auxiliary blow-by channel via the rear-end blow-by hole; and an oil-gas conveying path is prolonged, so that oil-gas separation is more thorough, and the oil-gas separation effect is further improved.

The invention relates to the technical field of automobile oil-gas separators, and discloses an active oil-gas separator, an oil-gas separation method and an automobile. The fine separation module comprises a driving structure, a separation rotor and a first bearing, and the separation rotor comprises a rotating shaft, an impeller, filter cotton and a bypass valve; the impeller is provided with a first oil-gas channel and a second oil-gas channel, and the bypass valve blocks a top opening of the second oil-gas channel. An oil baffle cover is arranged on the impeller, and is used for blocking a path from the second oil-gas channel to the first bearing; a third oil-gas channel is arranged between the oil blocking cover and the first bearing, a sealing cover is arranged at the upper end of the first bearing, and the sealing cover blocks the path, leading to the inner cavity of the first bearing, of the third oil-gas channel. The active oil-gas separator has the advantages that the active oil-gas separator can prevent clean lubricating grease in the bearing from being scoured and polluted, and separated engine oil and hydrocarbon can be discharged in time.

The invention relates to a method for determining the hydrogen content in an exhaust tract (130) of a hydrogen internal combustion engine (100) and to a hydrogen internal combustion engine (100) that has combustion chambers (110) and an oxygen sensor (140), which is provided in the exhaust tract (130) of the hydrogen internal combustion engine (100) and is designed to generate an oxygen signal that is representative of the oxygen content in the exhaust gas of the hydrogen internal combustion engine (100). The method according to the invention has the steps of determining a specified operating mode of the hydrogen internal combustion engine (100) during which substantially no combustion processes of an air-hydrogen mixture take place within the combustion chambers (110); receiving an oxygen signal from the oxygen sensor (140) in the specified operating mode of the internal combustion engine (100); and determining the hydrogen content in the exhaust gas of the hydrogen internal combustion engine (100) at least partly on the basis of the oxygen signal received from the oxygen sensor (140).

A method for diagnosing a crankcase system of an internal combustion engine. A pressure value is captured in a crankcase system. A pressure value of a reference pressure is ascertained or a pressure value to be expected in the crankcase system is modeled. A gradient of the pressure value in the crankcase system and a gradient of the reference pressure or the modeled pressure in the crankcase system is formed. The two formed gradients are integrated over time. The function of the crankcase system is evaluated based on the values obtained by the integrations. A control device as well as an internal combustion engine for carrying out the method are provided.

The present application belongs to the technical field of hydrogen engine, and particularly relates to an emulsified machine oil demulsification device and method for hydrogen engine, which can be used for solving the problem of emulsified machine oil of hydrogen engine in cold start or low temperature environment. The device comprises a vortex tube system, an emulsified machine oil heating system, an oil-gas separation system and a double-oil tank interaction system. The vortex tube system is communicated with the engine exhaust pipe to deliver exhaust heat to the emulsified machine oil heating system, and phase change material is used to realize constant temperature heating of the emulsified machine oil. Under the joint action of constant high temperature and demulsifier, efficient demulsification of the emulsified machine oil is realized. At the same time, the cold gas output by the vortex tube system is beneficial to the liquefaction and discharge of the separated water vapor. The double-oil tank interaction system can separate the emulsified machine oil and non-emulsified oil, so that the machine oil passing through the hydrogen engine oil pump is non-emulsified oil, and the normal lubrication of the hydrogen engine is ensured. The energy of the whole system comes from the engine exhaust energy, without additional energy, which conforms to the idea of energy saving and emission reduction.

Methods and systems are provided for a vent device. In one example, a system includes a vent device including a body that extends through a housing, wherein a spherical flow element is arranged in the body adjacent to a cap through which gases flow. The cap includes openings between it and the body that allow gases to vent to an ambient atmosphere.

The invention discloses a two-stage impeller type electrically-driven active filtering type oil-gas separator and a method. The oil-gas separator comprises a shell, a separation module and a PCV pressure regulating module, and the interior of the shell can be divided into an inner flow channel and a separation cavity; a boosting module is arranged in the inner flow channel and comprises two stages of impellers, namely a first-stage movable impeller and a second-stage static impeller, the first-stage movable impeller is used for increasing airflow power, and the second-stage static impeller is used for increasing airflow pressure; the separation module comprises separation cotton for separating liquid drops; and the PCV pressure adjusting module is arranged on the side face of the main body and used for adjusting the pressure in the front end area of the air inlet pipe, and it is guaranteed that the pressure in the area is within a reasonable range. The device is high in separation efficiency, reduces pollutant discharge, is wide in application range, can be suitable for a closed structure and an open structure, can actively adjust and control the pressure of the front end area of the air inlet pipe to be in a reasonable range in a large range, and effectively improves the comprehensive performance.

The invention discloses a crankcase ventilation system, an engine and a vehicle. The crankcase ventilation system comprises a cylinder head cover, a ventilation device and a ventilation device, and the venturi structure is internally arranged and integrated in the cylinder head cover. According to the crankcase ventilation system, the Venturi structure is internally arranged and integrated in the cylinder head cover, and a plurality of pipelines and parts related to the Venturi structure and the cylinder head cover can also be integrated in the cylinder head cover, so that the pipelines can be saved, the space of an engine is saved, the number of parts of the engine is reduced, and the structure is simplified; the engine cost is reduced. Besides, due to the fact that a plurality of pipelines are integrated in the cylinder head cover, aging of the pipelines due to long-term use is avoided, the problems that an external pipe is prone to high-temperature aging and falling off are solved, waste gas leakage is avoided, and sealing performance is enhanced.

The invention discloses a hydrogen engine crankcase hydrogen concentration control method, and relates to the field of hydrogen engines, and the method comprises the steps: placing a hydrogen engine on a rack for testing, and obtaining a target hydrogen concentration, an actually measured hydrogen concentration and a crankcase blow-by amount; according to the target hydrogen concentration, the actually measured hydrogen concentration and the crankcase blow-by amount, the target working condition supplementary air amount is calculated; according to the target working condition supplementary air amount, a full-working-condition supplementary air amount database is generated based on the rotating speeds and loads of the different working conditions; obtaining the amount of fresh air needing to be supplemented under the current target working condition according to the full-working-condition air supplementing amount database; the air inlet pressure, the air inlet temperature and the crankcase pressure are obtained; the method comprises the following steps: calculating the opening degree of a throttle valve by combining the air inlet pressure, the air inlet temperature and the crankcase pressure, 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 and generate a corrected fresh air amount, and carrying out closed-loop control on the actual crankcase hydrogen concentration by adjusting the opening degree of the throttle valve.

The invention relates to a closed engine crankcase ventilation system, a vehicle and a control method, and relates to the technical field of engine component design, the closed engine crankcase ventilation system comprises a first oil-gas separator used for being arranged on a cylinder head cover and driven by supercharged air, and the air inlet end of the first oil-gas separator is used for stretching into the cylinder head cover; the air outlet end is used for communicating with an engine air inlet pipe, and the oil outlet end is used for communicating with an oil pan so as to suck gas in the cylinder head cover, convey the gas to the engine air inlet pipe after oil-gas separation and convey oil to the oil pan; the second oil-gas separator is used for being arranged on an engine cylinder body and driven by circulating press oil in the engine cylinder body, the gas inlet end of the second oil-gas separator is used for communicating with the engine cylinder body, the gas outlet end of the second oil-gas separator is used for communicating with an engine gas inlet pipe, and the oil outlet end of the second oil-gas separator is used for communicating with an oil pan so as to suck gas in the engine cylinder body; and after oil-gas separation, gas is conveyed to an engine gas inlet pipe, and oil liquid is conveyed to an oil pan.

The invention relates to a method for monitoring the ventilation of a crankcase (120) of a hydrogen internal combustion engine (100) and to a hydrogen internal combustion engine (100), which has combustion chambers (110) and a gas sensor (140) that is provided in the exhaust tract (130) of the hydrogen internal combustion engine (100) and is designed to generate a gas signal that is representative of the hydrogen content or oxygen content in the exhaust gas of the hydrogen internal combustion engine (100). The method according to the invention has the steps of: determining a specified operating mode of the hydrogen internal combustion engine (100) during which substantially no combustion processes of an air-hydrogen mixture take place within the combustion chambers (110); receiving a gas signal from the gas sensor (140) in the specified operating mode of the hydrogen internal combustion engine (100); determining the hydrogen content in the exhaust gas of the hydrogen internal combustion engine (100) at least partly on the basis of the received gas signal; and determining a functional ventilation of the crankcase (120) if the determined hydrogen content in the exhaust gas of the hydrogen internal combustion engine (100) exceeds a specified hydrogen content threshold value.

The invention relates to the technical field of hydrogen engines, in particular to a hydrogen internal combustion engine and a scavenging control method of the hydrogen internal combustion engine. The hydrogen internal combustion engine comprises an engine cylinder body assembly, a supercharger, an air filtering device, an air supplementing part, an air outlet part and a control device, the air supplementing part comprises a first air supplementing pipeline and at least two second air supplementing pipelines, and an air outlet of the air filtering device is communicated with the first air supplementing pipeline and an air inlet of the supercharger. One end of the first air supply pipeline is communicated with the air filtering device, the other end of the first air supply pipeline is communicated with the crankcase, the cylinder cover is communicated with an air outlet of the supercharger through at least one second air supply pipeline, the crankcase is communicated with the air outlet of the supercharger through at least one second air supply pipeline, and the air outlet part is communicated with the crankcase. The control device is electrically connected with the air supply part and the air outlet part. According to the hydrogen internal combustion engine, through the design of the multiple gas supplementing pipelines, the hydrogen concentration can be effectively reduced, and excessive hydrogen gathering is avoided.

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 utility model relates to an oil-gas separation device in a crankcase in an internal combustion engine, in particular to an efficient oil-gas separator device which comprises a main body and a main body base. The main body base is provided with an oil gas inlet and an oil outlet which are respectively positioned on two sides of the main body base, the main body base is provided with a mixed gas inlet, and the upper part of the inner side of the mixed gas inlet is provided with a turbulent flow adsorption grid plate; an integrated separation filter element, a first filter plate and a second filter screen are arranged in the main body, a filter safety valve, a spring connecting rod and a filter element fixing partition plate are arranged in the integrated separation filter element, the first filter plate is located at the upper end of the interior of the main body, and filter holes are formed in the lower portion of the second filter screen. The oil-gas separation and filtration device has the advantages that the internal design is compact, the occupied volume space is small, and the oil-gas separation and filtration effects are good.

The utility model provides an oil-gas separator which comprises a shell, the shell comprises a first shell body and a second shell body, the first shell body is provided with an inlet and a gas outlet, a first bearing is arranged in the first shell body, the side, close to the inlet of the first shell body, of the first bearing is in sealed connection with the inner wall of the first shell body, and a second bearing is arranged in the second shell body; the second shell is connected with the first shell, and an outlet for liquid to flow out is formed in the second shell; the oil-gas separation device is arranged in the shell body; and the exhaust pipe is connected with the air outlet of the first shell. According to the oil-gas separator, solid particles in a gas-liquid mixture can be prevented from entering the first bearing, the internal structure of the oil-gas separator is simplified, and the service life of the first bearing is prolonged.

A system including an engine capable of operating with fuel containing hydrogen, the system being provided with: a crankcase of the engine; an engine intake passage that sucks air into the engine; a crankcase intake passage that branches off from the engine intake passage and introduces air into the crankcase; a dilution air valve that is disposed in the crankcase intake passage and that opens and closes the crankcase intake passage; a compressor disposed upstream of a branch portion branching from the engine intake passage to the crankcase intake passage; a hydrogen sensor that detects a hydrogen concentration inside the crankcase; a crankcase exhaust passage that exhausts air inside the crankcase; and a control device that controls the opening and closing of the dilution air valve on the basis of the hydrogen concentration detected by the hydrogen sensor.

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 invention provides a ventilation system of a supercharged engine. The first passage communicates the downstream intake part with the crankcase in order to ventilate the crankcase. A second passage communicates the upstream intake portion with the crankcase. The oil separator is provided in the second passage. A third passage communicates the downstream intake portion with the oil separator. The one-way valve restricts the flow of gas through the third passage from the oil separator toward the downstream intake portion.

The utility model discloses an oil-gas separation device for a ventilation pipeline, and relates to the technical field of ventilation pipeline systems of high-power engines, in particular to the oil-gas separation device for the ventilation pipeline, which comprises a condensation pipe body, and the bottom end of the condensation pipe body is fixedly connected with a connecting pipe. The bottom end of the connecting pipe and the top end of the condensation pipe body are respectively provided with a mounting flange which can be connected with a ventilation pipeline, the mounting flanges are frustum-shaped, the top end of the connecting pipe extends into the condensation pipe body, and a concentration groove for storing oil and water is formed between the bottom of the condensation pipe body and the top of the connecting pipe. According to the oil-gas separation device for the ventilation pipeline, through the conical reducing design of the condensation pipe body, the gas flow direction can be changed when oil gas passes through the device, so that part of oil-water gas in the gas is condensed on the inner wall of the conical condensation pipe body and is collected at the bottom of the concentration groove, and the collected oil-water is discharged through the discharge pipe at the bottom.

The application relates to an engine crankcase oil-gas separation control method and system, which is used for optimizing the oil-gas separation efficiency of an engine crankcase oil-gas separation unit. The method comprises the following steps: determining an opening control parameter Delta P of a gravity one-way valve according to the pressure difference between the air flow pressure P2 of an outer cavity of the oil-gas separation unit and the air flow pressure P1 of an inner cavity of the oil-gas separation unit; acquiring the liquid surface pressure P of a dynamic oil liquid surface height H in an ascending process when the oil-gas separation unit is running; when P is smaller than Delta P, the gravity one-way valve is controlled to be closed; when P is larger than Delta P, the gravity one-way valve is controlled to be opened; in the opened state of the gravity one-way valve, the oil is discharged to make the dynamic oil liquid surface height H drop, and the state switching of the gravity one-way valve makes the dynamic oil liquid surface height H maintain small-amplitude fluctuation in a set interval. The application has the beneficial effects that the oil-gas separation system selection efficiency and control precision can be improved, and the one-time success rate and overall reliability of system development can be improved.

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.