1378results about "Crankcase ventillation" patented technology

The invention relates to the technical field of hydrogen engines, in particular to a hydrogen internal combustion engine crankcase ventilation system, an engine and a hydrogen concentration control method. The crankcase ventilation system of the hydrogen internal combustion engine comprises a crankcase, a measuring part, an air supplementing part, a ventilation part and a control device, the crankcase comprises an air inlet and an air outlet, the measuring part is arranged in the crankcase, the air supplementing part comprises an air supplementing pump, the air supplementing pump is communicated with the air inlet, the ventilation part comprises an oxidation catalyst and a ventilation pump which are communicated in sequence, and the control device is arranged in the crankcase. The oxidation catalyst is communicated with the exhaust port and connected with a temperature control device, and in addition, the control device is electrically connected with the measuring part, the air supplementing pump, the ventilation pump and the temperature control device. According to the invention, the concentration and pressure of hydrogen in the crankcase are monitored in real time, and the gas supplementing pump, the ventilation pump and the temperature control device are adjusted according to the measurement result, so that the concentration of hydrogen in the crankcase is effectively controlled.

The invention belongs to the technical field of engines, and particularly relates to a crankcase ventilation system, a hydrogen internal combustion engine and a crankcase ventilation system control method. The crankcase ventilation system comprises a crankcase, an oil-gas separator, an air filter and a control unit, a hydrogen concentration detection unit is arranged in the crankcase, an inlet of the oil-gas separator is communicated with a first communication port of the crankcase, the air filter is communicated with a second communication port of the crankcase through an air inlet pipeline, and the control unit is connected with the control unit. The air filter selectively communicates with the third communicating port of the crankcase through a first gas supplementing pipeline, and the control unit is in signal connection with the hydrogen concentration detection unit, the oil-gas separator and the air filter. By using the crankcase ventilation system in the technical scheme, the hydrogen concentration in the crankcase is always in a safe range, and the hydrogen internal combustion engine works stably.

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.

The CVT cooling system of the engine comprises a CVT, a left crankcase body and a left crankcase cover, a CVT cavity is formed between the left crankcase body and the left crankcase cover, the CVT is assembled in the CVT cavity, a shoe block component of a driven wheel in the CVT is located on the side of the left crankcase body, a breathing groove outer cover plate is arranged on the left crankcase cover, and the breathing groove outer cover plate is arranged on the left crankcase cover. The breathing groove outer cover plate is provided with a first main air inlet, a second main air inlet and a first auxiliary air inlet, the left crankcase cover is provided with a filter screen assembly, the left crankcase cover is provided with a third main air inlet and a second auxiliary air inlet, the breathing groove outer cover plate is provided with blocking ribs, and part of cooling air enters a CVT cavity sequentially through the first auxiliary air inlet and the second auxiliary air inlet. In order to simplify the structure, reduce the manufacturing cost and effectively reduce the risk that muddy water enters the filter screen assembly, a blocking rib is arranged on the side, close to the filter screen assembly, of the first main air inlet of the breathing groove outer cover plate, and the muddy water is effectively prevented from being sprayed to the filter screen assembly.

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 oil-gas separator with the impeller structure comprises a shell and a bottom plate, an oil-gas separation cavity is formed between the shell and the bottom plate, and a first impact plate and a second impact plate are arranged in the oil-gas separation cavity; the first impact plate and the second impact plate divide the oil-gas separation cavity into a first-stage separation cavity, a second-stage separation cavity and a third-stage separation cavity which are communicated in sequence; a labyrinth type air inlet channel is arranged in the first-stage separation cavity, an impeller coarse separation assembly is arranged in the second-stage separation cavity, and a fiber cotton fine separation assembly is arranged in the third-stage separation cavity. The impact plate, the impeller coarse separation assembly and the cellucotton fine separation assembly are integrated, the oil-gas separation effect can be effectively improved, the manufacturing cost is reduced, meanwhile, the compactness of the whole machine is improved, and the oil pumping risk is reduced.

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.

The invention discloses a ventilation system of an engine, a control method of the ventilation system of the engine and a vehicle. A pressure sensor is arranged in a crankcase; the fan and the first hydrogen concentration sensor are arranged on the first branch; the adsorption part is arranged on the second branch and used for adsorbing hydrogen, one end of the first branch is suitable for being connected with a crankcase, the other end of the first branch is connected with the second branch and the third branch, the first branch selectively communicates with the second branch or the third branch, and the second branch and the third branch are connected in parallel and suitable for being connected with an intake manifold. Therefore, when the pressure in the crankcase is too large, gas in the crankcase can be pumped out through the fan, and the first branch and the second branch can be communicated to reduce the hydrogen concentration of the gas through the adsorption part, so that the probability of risks of explosion, combustion and the like caused by too much hydrogen in the crankcase can be reduced; the use safety of the engine is improved, and the extracted gas can flow back to the intake manifold, so that environmental pollution is avoided.

The invention provides a blow-by gas backflow device. The blow-by gas backflow device comprises a first passage, a second passage, a third passage, a first check valve and a second check valve. The first to third passages allow a portion of the intake passage downstream of the throttle valve, a portion of the intake passage downstream of the intercooler, and a portion of the intake passage upstream of the compressor to communicate with the inside of the crankcase. In the first passage, the first check valve is configured so as to allow gas to flow from the inside of the crankcase to the intake passage, and so as to restrict the gas from flowing from the intake passage to the inside of the crankcase. In the second passage, a second check valve allows the gas to flow from the intake passage to the inside of the crankcase, and restricts the gas from flowing from the inside of the crankcase to the intake passage.

Air cleaner assemblies, components therefor, and features thereof are described. Also described are methods of assembly and use. In depicted examples, the air cleaner assemblies and components optionally use advantageous housing seal features. Methods of assembly and use are described.

The invention relates to the technical field of hydrogen engines, and particularly discloses a hydrogen engine crankcase pipeline hydrogen concentration control method, device and system.The method comprises the steps that the hydrogen concentration in a crankcase ventilation pipeline in the current period, the mixed gas flow in the crankcase ventilation pipeline and the air flow at the front end of an air inlet header pipe are obtained; then the hydrogen concentration of the rear end of the gas inlet main pipe in the current period is calculated; the hydrogen concentration of the rear end of the intake manifold in the current period is compared with a hydrogen concentration threshold value, and the actual air-fuel ratio of the hydrogen engine in the current period is calculated according to a comparison result; and when the actual air-fuel ratio of the hydrogen engine in the current period is inconsistent with the required air-fuel ratio, the flow of hydrogen sprayed by the hydrogen nozzle in the next period is adjusted, so that the actual air-fuel ratio of the hydrogen engine in the next period reaches the required air-fuel ratio. The risk that high-concentration hydrogen mixed gas explodes in the turbocharger can be eliminated, meanwhile, the air-fuel ratio of the hydrogen engine is accurately controlled, and the risks of preignition and detonation are reduced.

To provide an engine system that reduces a risk of ignition of unburned gas in a crank chamber by using a simple configuration.SOLUTION: An engine system includes: an engine having a cylinder and a piston accommodated in the cylinder; an air supply system having an air tank and a starting air line for guiding compressed air stored in the air tank into the cylinder as air for starting an engine; and a fuel gas supply system for supplying fuel gas into the cylinder. The engine further includes: a crank shaft located on the lower side of the piston to drive the piston; and a crank case that accommodates the crank shaft. The air supply system further includes an extraction line for extracting the compressed air flowing in the starting air line and guiding the compressed air to a crank chamber in the crank case.SELECTED DRAWING: Figure 1

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.

The invention discloses a supercharged engine assembly and a vehicle. The supercharged engine assembly comprises a Venturi tube, a function channel I and a function channel II. The functional channel I is used for communicating an oil-gas separation gas outlet of the engine to the throat position of the Venturi tube; a diffusion section of the Venturi tube is communicated to the rear side of the air filter and is positioned on the front side of an air inlet of the supercharger; the inlet section of the Venturi tube is communicated to the rear side of the air outlet of the supercharger through a functional channel II; a valve A is arranged on the function channel I, a valve B is arranged on the function channel II, and the valve A and the valve B are controlled to be opened and closed so that the pressure in a crankcase of an engine can be controlled within a preset range. On the premise that the cost can be controlled, the pressure of the crankcase of the supercharged engine can be effectively controlled within a set pressure range through some means.

This engine system is provided with: an engine including a cylinder and a piston housed in the cylinder; an air tank; an air supply system including a starting air line for guiding compressed air stored in the air tank into the cylinder as starting air of the engine; and a fuel gas supply system for supplying fuel gas into the cylinder. The engine further includes a crankshaft located below the piston for driving the piston, and a crankcase housing the crankshaft. The air supply system further includes a bleeding line for bleeding compressed air flowing through the starting air line and guiding the compressed air to the crank chamber in the crankcase.

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 relates to the technical field of automobile engine accessories, and discloses an improved engine oil ventilation pot which comprises a ventilation pot body, an air inlet pipe is installed on one side of the ventilation pot body, and a labyrinth type air inlet filtering unit and a labyrinth type air outlet filtering unit are installed in the ventilation pot body. A honeycomb baffle is fixedly connected into the ventilation pot body, a partition plate is installed at the top end of the honeycomb baffle, an air outlet pipe is installed at the top end of the labyrinth type air outlet filtering unit, an oil storage cavity is formed in the bottom end of the honeycomb baffle, and an oil outlet pipe is installed at the bottom end of the oil storage cavity. According to the improved engine oil ventilation pot, a series of baffles are arranged in the labyrinth type air inlet filtering unit and the labyrinth type air outlet filtering unit, the separation efficiency of engine oil and gas can be remarkably improved, the possibility that the engine oil enters a pipeline is reduced, and due to the fact that the oil-gas separation efficiency is improved, clean gas entering the engine pipeline is purer; the risk that the engine oil is carbonized at high temperature to form carbon deposition is reduced.

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.

An engine system in which blow-by gas with a specific gravity less than 1 with reference to air is generatable includes a cylinder block. The cylinder block includes a cylinder and a crank chamber which are arranged in an up / down direction, the crank chamber being positioned below the cylinder. An internal peripheral face of the cylinder block has a ventilation port that connects to a ventilation passage that connects an internal space of the crank chamber with an external space out of the cylinder block, and that is open. The ventilation port is placed above a center in the up / down direction in the crank chamber.

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 invention provides a crankcase ventilation system and a methanol engine. The crankcase ventilation system comprises an air supplementing chamber, an air blow-by chamber, an air inlet pipeline and a first pipeline. An air supply chamber and a blow-by chamber are formed in the crankcase; the gas inlet pipeline is communicated between external gas and the supercharger; the first pipeline is sequentially communicated with the supercharger, the gas supplementing chamber and the gas blow-by chamber, so that external gas forms supplemented gas to enter the gas supplementing chamber and the gas blow-by chamber; and a first one-way valve is arranged between the air supply chamber and the blow-by chamber, so that the supplied air can only flow to the blow-by chamber from the air supply chamber. The air supply chamber supplies air through exhaust of the pressurizing chamber, the supplied air is fresh air containing little water vapor, the blow-by air containing a large amount of water vapor in the blow-by chamber cannot enter the air supply chamber, the fresh air containing little water vapor always exists in the air supply chamber, and due to the fact that the water content of the air in the air supply chamber is low, even if the external temperature is very low, the air supply chamber can still supply air to the air supply chamber. And the fresh gas cannot reach the dew point temperature and cannot be condensed into water drops, so that parts in the gas supply chamber cannot be rusted, and engine oil cannot be emulsified.

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.

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.