81 results about "Crankcase ventilation system" 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 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.

Internal combustion engine with a crankcase ventilation system (23), comprising a crankcase (17), an intake air line (2), wherein the intake air line (2) comprises a throttle valve (6) and an air filter (8), as well as with a crankcase ventilation line (4) for ventilating the crankcase (17) and a crankcase ventilation line (3) for flushing the crankcase (17), wherein the crankcase ventilation line (4) is arranged at a first connection point (13, 70) downstream of the air filter (8) to the intake air line (2), characterized in that a sensor unit (18) is arranged in the crankcase ventilation line (3) downstream of a first flow influencing device (7) and upstream of a first backflow prevention device (26), wherein the first connection point (13, 70) is spaced downstream from a crankcase ventilation line connection (28) is arranged on the intake air line (2),so that a malfunction of the crankcase ventilation system (23) can be detected by the sensor unit (18).

This disclosure provides a "system and method for diagnosing intake oxygen sensors." A method and system are provided for diagnosing whether one or more intake oxygen sensors located in the intake port of an engine of a vehicle are functioning as expected. In one example, a method includes: injecting fuel into one or more cylinders of the engine without combustion; directing unburned hydrocarbons from the one or more cylinders to the intake port via a crankcase ventilation system; and indicating whether the one or more intake oxygen sensors are functioning as expected based on their responses. In this way, the one or more intake oxygen sensors can be diagnosed periodically, which can improve engine operation and reduce engine degradation, particularly for hybrid electric vehicles with limited engine operating time.

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.

A rotating crankcase ventilation system comprises a housing comprising an inlet and an outlet, a motor comprising a stator and a rotor, and a shaft. A first end of the shaft is coupled to the rotor and configured to rotate in response to rotation of the rotor. A filter element is coupled to the shaft. A sensor is configured to measure at least one operating parameter of the rotating crankcase ventilation system. A controller is operatively coupled to the sensor and the motor, the controller configured to receive the at least one operating parameter and selectively adjust operation of the motor to adjust rotation of the rotor, and thereby, the filter element based on the at least one operating parameter.

The invention relates to the technical field of engines, and provides a crankcase ventilation system and method for an ammonia-hydrogen engine. The system comprises an energy supply structure which communicates with an engine through a pipeline and is used for conveying fuel to the engine to serve as an energy source for operation of the engine; the gas supply structure communicates with the engine through a pipeline and is used for conveying a combustion-supporting gas source to the engine; the engine is provided with a sensing assembly electrically connected with the control unit; and the blow-by gas treatment structure communicates with a crankcase of the engine and the gas supply structure through pipelines and is used for separating impurities in blow-by gas in the crankcase and supplementing the separated blow-by gas back to the gas supply structure to participate in gas inlet circulation under the regulation and control of the control unit. According to the device, engine oil steam, water vapor and ammonia gas in blow-by gas of the crankcase can be separated, so that the problem of engine oil emulsification in the crankcase is solved, and meanwhile, the safety problem possibly caused by high-concentration enrichment of the ammonia gas is avoided.

The invention discloses a vehicle control method, device and equipment and a medium, and the method comprises the steps: responding to a power-on instruction of a hybrid vehicle, and obtaining the actual environment temperature of the environment where the hybrid vehicle is located; under the condition that the actual environment temperature is smaller than the preset environment temperature, whether the accumulative running duration of the hybrid vehicle and the accumulative running duration of an engine of the hybrid vehicle meet a first preset condition or not is judged, and / or whether the accumulative stop duration of the engine meets a second preset condition or not is judged; and under the condition that the first preset condition and / or the second preset condition are / is met and the actual vehicle speed of the hybrid vehicle is larger than 0, the engine is controlled to operate. Volatilization of water vapor and gasoline vapor in engine oil is accelerated, the water vapor and the gasoline vapor are introduced into the engine through the crankcase ventilation system to participate in combustion and discharged out of the engine, finally moisture and gasoline in the engine oil are reduced, the performance deterioration condition of the engine oil caused by chemical reaction of the moisture and the gasoline is relieved, and the service life of the engine oil is prolonged.

The utility model discloses a crankcase ventilation system, an engine and a vehicle, the crankcase ventilation system comprises an air inlet pipeline and a first exhaust pipeline, the air inlet pipeline comprises a turbocharger, a throttle valve and an air inlet manifold which are sequentially connected through pipelines, and the first exhaust pipeline comprises an oil-gas separator and a Venturi tube; a contraction section of the venturi tube is communicated with the air inlet end of the throttle valve, a diffusion section of the venturi tube is communicated with the air inlet end of the turbocharger, a throat portion of the venturi tube is communicated with the oil-gas separator, and a first valve is further arranged between the contraction section of the venturi tube and the air inlet end of the throttle valve. The first valve is used for collecting the opening degree of the throttle valve, the first valve judges the working condition of the engine by collecting the opening degree information of the throttle valve, whether gas can circulate in the venturi tube or not is controlled, and the reliability and stability of rapid exhaust of the ventilation system of the crankcase are improved.

The invention relates to a separator (10) for separating a liquid from a gas stream, in particular for separating oil from blow-by gas in a crankcase ventilation system (200), having at least one nozzle carrier element (102) with at least one nozzle assembly (104) with at least one nozzle (106, 108), and having an impingement element (110) arranged at least partially downstream with respect to the nozzle assembly (104), characterized in that a permanent cover device (120, 122, 124, 126) is provided for one or more nozzles (108) of the nozzle assembly (104), which cover device reduces the throughflow of the gas stream through the one or more nozzles (108) by at least 50% compared to a nozzle (106) without the cover device (120, 122, 124, 126). Furthermore, the invention relates to a fitting kit for a separator (10).

The invention discloses a hydrogen internal combustion engine crankcase ventilation system and a crankcase ventilation control method, and relates to the field of hydrogen internal combustion engines, the hydrogen internal combustion engine crankcase ventilation system comprises a first ventilation pipeline communicated with a supercharger and a first end of a four-way valve, a second ventilation pipeline communicated with an air filter and a second end of the four-way valve, and a third ventilation pipeline communicated with an air storage tank and a third end of the four-way valve, when the water content of the crankcase is larger than the upper limit threshold value of the water content, the opening degree of a first flow adjusting valve in the first ventilation pipeline is controlled to be larger than the opening degree of a third flow adjusting valve in the third ventilation pipeline, and the opening degree of the third flow adjusting valve is controlled to be larger than the opening degree of a second flow adjusting valve in the second ventilation pipeline. Based on the size relation of the opening degrees of the flow regulating valves, the proportion of the dry gas output by the supercharger and the gas storage tank in the mixed gas when the water content of the crankcase is larger than the upper limit threshold value of the water content is increased, the flow speed of the mixed gas is increased, and the inhibition effect on hydrogen detonation and engine oil emulsification phenomena is improved.

The invention provides a plug-in hybrid crankcase ventilation system monitoring method and system, and the method comprises the steps: obtaining operation basic data, and judging whether a crankcase forced ventilation system fault diagnosis physical condition is satisfied or not according to the operation basic data; in response to the fact that the crankcase forced ventilation system fault diagnosis physical condition is met, whether an oil cut-off condition is triggered or not is judged; in response to the triggering fuel cut condition, the engine management system and the vehicle control unit are coordinated and controlled to enter a fuel cut working condition, and whether a diagnosis enabling condition is met or not is judged; and in response to the fact that the diagnosis enabling condition is met, the actual air inlet pressure of the air inlet manifold is obtained, and whether the crankcase ventilation system breaks down or not is judged according to the actual air inlet pressure and a preset fault threshold value. The method constructs a rigorous diagnosis environment through three-layer condition screening, adapts to the working condition of the insertion-mixing vehicle type, is instant and accurate in diagnosis, and has innovativeness and engineering application value.

The invention discloses an engine and a vehicle, and the engine comprises a cylinder body, a timing cavity is formed in the cylinder body, and the cylinder body is provided with an oil pan; a first oil return cavity is defined by the first cylinder cover and the cylinder body, a second oil return cavity is defined by the second cylinder cover and the cylinder body, the first oil return cavity is provided with a first oil return hole communicated with the oil pan, and the second oil return cavity is provided with a second oil return hole communicated with the oil pan; a first inner drainage wall is formed in the first oil return cavity and obliquely arranged towards the first oil return hole from top to bottom, and a second inner drainage wall is formed in the second oil return cavity and obliquely arranged towards the second oil return hole from top to bottom. The inclination angle of the second inner drainage wall relative to the horizontal direction is larger than that of the first inner drainage wall relative to the horizontal direction. According to the engine, oil accumulation areas can be prevented from being generated on the two cylinder covers, oil stirring of the timing chain is prevented, and the oil gas amount is reduced so that the burden of a crankcase ventilation system can be reduced.

A system includes an engine block in blowby gas receiving communication with one or more cylinders and a crankcase ventilation system configured to draw a fluid out of the engine block and separate the fluid into separated crankcase blowby gas and a liquid. The fluid includes the blowby gas. The crankcase ventilation system includes a first crankcase ventilation conduit configured to route the separated crankcase blowby gas to the one or more cylinders. The system includes a controller configured to perform operations including causing the crankcase ventilation system to draw the fluid out of the engine block at a determined purge air flow rate.

The invention discloses equipment and a method for measuring the engine oil carrying capacity of an engine crankcase ventilation system, relates to the technical field of measuring devices, and aims to improve the measuring precision of the engine oil carrying capacity of an engine. The measuring equipment comprises a collecting device provided with a base and an upper cover which are connected in a sealing manner, and an accommodating cavity is formed between the base and the upper cover; a containing cavity is formed in the base, a filter element framework which is connected with the base and provided with filter holes is arranged in the containing cavity and divides the containing cavity into a first cavity body and a second cavity body, the upper cover is connected with an inlet pipe communicating the first cavity body with the atmosphere and an outlet pipe communicating the second cavity body with the atmosphere, the first cavity body is filled with oil absorption sponge, and the second cavity body is filled with oil absorption sponge. And the inlet pipe is connected with a ventilation outlet of the crankcase. According to the device and method for measuring the engine oil carrying amount of the engine crankcase ventilation system, the engine oil carrying amount of the engine can be accurately measured on the premise that the permeability of the crankcase ventilation system is not affected.

A crankcase ventilation system comprising a housing and a filter element assembly rotatably coupled to the housing. The filter element assembly comprises a first endcap, a second endcap spaced apart from the first endcap, a filter media pack coupled to the first endcap at a first end of the filter media pack and the second endcap at a second end of the filter media pack, and a seal member sealingly engaging the second endcap with the filter media pack along an outer perimeter region of the filter media pack. The filter media pack defines a plurality of axial flow channels extending between the first end and the second end.

The invention relates to a jet pump for oil drainage in a crankcase ventilation system of an internal combustion engine, comprising - an inlet opening 3 for supplying oil from an oil separator of the internal combustion engine, - a propulsion nozzle 5 for supplying a propellant medium, - an outlet opening 6 for returning the oil to a cylinder head chamber 7 of the internal combustion engine, - a check valve 8 arranged at the inlet opening 3 to prevent backflow of oil, - wherein the check valve is designed as a diaphragm valve 8.

The invention belongs to the technical field of engines, and particularly relates to an oil-gas separator and a crankcase ventilation system.The crankcase ventilation system comprises a supercharger, a Venturi tube, the oil-gas separator, an intake manifold and a crankcase. A filtering mechanism and five breather valves are integrated in the oil-gas separator, and the communication state of the Venturi tube, the oil-gas separator, the crankcase and the intake manifold is controlled through the five breather valves, so that the path of mixed gas in the crankcase flowing into the combustion chamber is controlled. Compared with the prior art, the number of external pipelines is reduced, and the integration level of the ventilation system is improved. Particularly, when the ventilation system is in a low-load working condition, air flows into the crankcase after flowing through the ventilation pipeline, the Venturi tube and the oil-gas separator, only one path is provided for the air to flow into the crankcase, and the problem of airflow turbulence can be solved.

The invention discloses an anti-icing engine crankcase ventilation system which is installed on an engine and comprises an oil-gas separator, a blow-by channel, an air inlet pipe and an air outlet pipe, the engine comprises an air cylinder body, a cylinder cover, an exhaust pipe and a supercharger, the cylinder cover is installed above the air cylinder body, and the exhaust pipe is installed above the air cylinder body. The exhaust pipe is installed on the cylinder cover, and the supercharger is further installed in the middle of the exhaust pipe. At least one longitudinally-arranged blow-by channel is further arranged on the crankcase exhaust side of the air cylinder body. The upper end of the blow-by channel is sealed, and a gas taking opening is formed in the side surface of the upper part; the oil-gas separator is installed on the exhaust side of the air cylinder body, one end of an air inlet pipe of the oil-gas separator is connected with the blow-by channel, oil gas in the crankcase is led into the oil-gas separator, and an air outlet pipe is connected with the air inlet end of the supercharger. The working temperature of the gas outlet pipe of the oil-gas separator ranges from 30 DEG C to 70 DEG C under the high and cold environment, and the risk that a pipeline of a crankcase ventilation system is frozen and blocked is avoided.

The utility model provides a crankcase ventilation system, an engine and a vehicle, and relates to the field of crankcase ventilation systems. An adjusting assembly is arranged at the air outlet end of the crankcase and specifically comprises a vacuum pump and a pressure sensor arranged in the crankcase, and electromagnetic bypass valves in communication connection or electric connection with the pressure sensor are arranged at the two ends of the vacuum pump in parallel. Thus, the pressure value in the crankcase can be monitored in real time through the pressure sensor, when the measured pressure value does not conform to the preset pressure range, the opening degree of the electromagnetic bypass valve can be correspondingly adjusted, and the working state of the adjusting assembly can be correspondingly changed; therefore, the pressure of the crankcase can be correspondingly adjusted to rise or fall to a preset range through the adjusting assembly. In this way, the pressure value in the crankcase can be adjusted in real time without a complex structure, and it is ensured that the crankcase can maintain the stable negative pressure state under all working conditions.

The invention relates to the technical field of valve bodies, and discloses a switching valve and a crankcase ventilation system. The switching valve comprises a shell, the shell internally comprises a first cavity, a second cavity and a first communication opening, and the first cavity communicates with the second cavity through the first communication opening; a first interface, a second interface and a third interface, the first interface and the second interface are communicated with the first chamber, and the third interface is communicated with the second chamber; the valve body assembly is located in the first cavity and / or the second cavity and can move in the first direction; the reset elastic piece is used for elastically connecting the valve body assembly with the shell; the valve body assembly is elastically connected with the shell through the thermo-sensitive elastic piece, and the acting force of the thermo-sensitive elastic piece on the valve body assembly changes along with the temperature of the thermo-sensitive elastic piece; and the heating piece is mounted on the shell and is in heat conduction connection with the thermosensitive elastic piece. According to the switching valve provided by the embodiment of the invention, the switching valve can be connected with a plurality of ventilation pipes, and the connection relationship between the ventilation pipes can be simply, conveniently and correctly switched.

To suppress generation of emulsion in a one-way valve provided in a ventilation system of a crankcase.SOLUTION: A ventilation system for an engine includes: an air introduction passage communicating an intake passage and a crankcase; a one-way valve 60 for limiting a gas flow from the crankcase toward the intake passage through the air introduction passage; and a valve housing 50 fixed to an oil pan 14 constituting an outer wall of the crankcase. The one-way valve 60 is mounted to the crankcase while sandwiched between the oil pan 14 and the valve housing 50.SELECTED DRAWING: Figure 3

This application relates to the field of valve body technology and discloses a switching valve and a crankcase ventilation system. The switching valve includes: a housing containing a first chamber, a second chamber, and a communication port; a first interface, a second interface, and a third interface, wherein the first and second interfaces communicate with the first chamber, and the third interface communicates with the second chamber; a valve body assembly; a thermal spring; and a reset elastic assembly. The switching valve has a first state and a second state. The thermal spring is configured to heat up and deform when energized, with its second end moving away from its first end and driving the valve body assembly to move, causing the switching valve to switch from the first state to the second state. The thermal spring is configured to stop heating and recover its deformation after de-energization, and the reset elastic assembly causes the switching valve to switch from the second state to the first state. According to the embodiments of this application, the switching valve can connect to multiple ventilation pipes and can easily and correctly switch the connection relationship between the ventilation pipes.

The utility model discloses a tool for testing the oil pumping amount of a crankcase ventilation system of an internal combustion engine. An upper assembly and a lower assembly are in a hollow straight cylinder shape. The top of the upper assembly is sealed, the bottom of the upper assembly is open, an air outlet pipe is arranged on the outer side face of the upper assembly and close to the top of the upper assembly, and a first flange is arranged at the bottom of the upper assembly around the outer side face of the upper assembly. The bottom of the lower assembly is sealed, the top of the lower assembly is open, an air inlet pipe is arranged on the upper middle portion of the outer side face of the lower assembly, a second flange corresponding to the first flange is arranged around the outer side face of the lower assembly and on the top of the lower assembly, and a plurality of first connecting pieces are arranged on the first flange and / or the second flange so that the upper assembly and the lower assembly can be fixed together. A circle of groove is formed in the top of the second flange and surrounds the inner side wall of the lower assembly, and an O-shaped ring is arranged in the groove to seal the upper assembly and the lower assembly; the filter element is in a sheet shape, is arranged on the second flange and completely covers the hollow part of the lower assembly. The tool is wide in test range and accurate in test result.

The application discloses an engine cylinder cover lubricating oil return simulation evaluation method and system, comprising: constructing an engine cylinder cover lubricating oil simulation model, the simulation model comprising components contacted by lubricating oil in the lubricating oil return process of the engine cylinder cover and components of a crankcase ventilation system; setting initial conditions of the simulation model, including initial lubricating oil quantity and corresponding liquid level coordinate values; setting boundary conditions, simulating for set working conditions, performing cylinder cover return simulation in a first stage, and obtaining static oil storage quantity in the cylinder cover in a second stage; recording simulation results, evaluating cylinder cover lubricating oil return conditions by using the simulation results, and judging whether the cylinder cover lubricating oil return is smooth or not. The cylinder cover lubricating oil return simulation method can estimate the lubricating return effect of the engine cylinder cover at the initial design stage, has fewer condition restrictions, is lower in cost than tests, and is higher in efficiency.

This application discloses an engine crankcase ventilation system and a vehicle, relating to the field of engine technology. The engine crankcase ventilation system includes an intake pipe, a sealed chamber, a first gas passage, and a second gas passage. The intake pipe is connected to the engine's combustion chamber. The sealed chamber is disposed on the engine's valve cover and is connected to the intake pipe, and is also disconnectably connected to the engine's crankcase. Both the first and second gas passages are disposed on the engine cylinders, wherein the first gas passage disconnectably connects the combustion chamber and the crankcase, and the second gas passage disconnectably connects the sealed chamber and the crankcase. The engine crankcase ventilation system and vehicle disclosed in this application reduce additional space occupation, while also being low in cost and highly reliable.

The utility model discloses a crankcase ventilation system and a vehicle, the crankcase ventilation system comprises a cylinder head cover, an air filter, an air inlet module, a connecting module and a ventilation pipeline, the connecting module comprises a first joint, a second joint and a sealing piece, the first joint comprises a connecting part and a diagnosis part connected to the peripheral side of the connecting part, and the second joint comprises a second joint and a sealing piece. The diagnosis part is provided with at least one through diagnosis hole, and the sealing piece is clamped between the connecting part and the second connector and blocks the diagnosis hole. The ventilation pipeline and the cylinder head cover are in gas path communication through the connecting module, the first connector is provided with a diagnosis hole, the sealing piece blocks the diagnosis hole in the normal working state, when the connecting position of the first connector and the second connector is disconnected, gas inlet pressure fluctuates, an alarm can be given, OBD diagnosis is completed through the structure of the connecting module, and the diagnosis efficiency is improved. No additional wire harness connection is needed, and the structure of the ventilation system is simplified.

A crankcase ventilation system (1) is provided. The system comprises a housing (10), a disc stack separator (20) arranged within the housing which comprises a chamber (21), and a rotor (22). The rotor comprises an oil separating element (23) arranged within the chamber and spaced from one or more walls of the chamber, a shaft (24) configured to rotatably mount the oil separating element. The disc stack separator further comprises a first gas inlet (41) and a first gas outlet (42). The system further comprises a filter element (30) comprising a second gas inlet (43), a second gas outlet (44), and a filter (31) arranged between the second gas inlet and the second gas outlet. The first gas inlet is configured to be connected to a crankcase blow-by outlet of the ICE, and the first gas outlet is connected to the second gas inlet.

Internal combustion engine (100), comprising: a crankcase (102) having a first plurality of openings and a second plurality of openings, wherein the first plurality of openings are aligned with each other along a length of the crankcase (102) at a first height, and the second plurality of openings are aligned with each other along the length of the crankcase (102) at a second height, an oil pan (132) connected to a bottom section of the crankcase (102); a first oil separation module (200, 300) comprising at least one first inlet housing (202, 302), wherein the at least one first inlet housing (202, 302) is fluidly connected to a first channel (220), and a first oil separation filter (228) is arranged in fluid connection between the channel (220) and the oil pan (132); wherein the at least one first inlet housing (202, 302) can be connected to an opening from the first plurality of openings or from the second plurality of openings, such that a fluid circuit for venting gases present in the crankcase (102) is defined from an inner cavity of the crankcase (102) to the at least one first inlet housing (202, 302), to the first channel (220) and through the first oil separator filter (228).

The present application relates to the field of vehicles, in particular to a crankcase ventilation system, method and vehicle. The crankcase ventilation system comprises a crankcase, an oil-gas separator and a pressure regulating assembly. The pressure regulating assembly comprises a vacuum pump, an air path electromagnetic valve and an air inlet pipe connected in sequence. The pressure regulating assembly is used to regulate the negative pressure of the crankcase, so that the crankcase has a larger negative pressure. Under normal working conditions of the engine, the air path electromagnetic valve is closed, and only the original structure of the crankcase works. Under the post-processing heating working condition of cold start of the engine and other working conditions with larger throttle opening, in order to avoid the harm caused by the larger negative pressure of the air inlet cavity, the pressure regulating assembly works. At this time, the air path electromagnetic valve is controlled to connect the air path between the crankcase and the air inlet pipe, and the vacuum pump is controlled to work, so as to control the pressure in the crankcase, realize that the pressure in the crankcase is still smaller than the in-cylinder pressure, avoid the penetration of engine oil into the cylinder, cause the engine oil to burn, and ensure the sealing performance.