630results about "Lubricant mounting/connection" patented technology

The present invention discloses an improved structure of an oil channel of an oil filter base assembly in a vehicle, including an oil filter base, where a lower portion of the oil filter base is provided with an oil inlet, an oil outlet, and an oil return port, an end portion of the oil filter base is provided with an antifreeze solution water inlet, a bottom portion is provided with a first water outlet and a second water outlet that are communicated with the antifreeze solution water inlet, a filter cartridge and a bypass valve are mounted in one end of the oil filter base, a filter cover is connected to an end portion of one end, close to the bypass valve, of the oil filter base, an oil cooler is mounted on an upper portion of one end, away from the filter cartridge, of the oil filter base.

Disclosed is an oil filter base assembly, including an oil filter base, where the oil filter base has one side connected to a first cooler arranged and the other side connected to a second cooler arranged; With the arrangement of the first cooler and the second cooler on the oil filter base, a medium may pass through the two coolers and be cooled simultaneously by the two coolers, thereby improving the cooling effect of the oil filter base assembly. Therefore, the present invention is worthy of popularization and application.

The utility model discloses a motorcycle engine crankshaft box body with an oil separation chamber, which comprises a crankshaft box body formed by connecting a left crankshaft box body and a right crankshaft box body, crankshaft mounting holes and balance shaft mounting holes are arranged on the left crankshaft box body and the right crankshaft box body, and the crankshaft mounting holes and the balance shaft mounting holes are distributed in a pairwise corresponding mode. An oil collecting chamber is arranged at the lower end in the crankcase body, and the balance shaft mounting hole is arranged close to the maximum oil liquid level position of the oil collecting chamber; the bottom of the oil collection chamber is provided with an oil separation chamber which is arranged close to the balance shaft mounting hole, the upper end of the oil separation chamber is close to the maximum oil liquid height of the oil collection chamber, and one side, far away from the balance shaft mounting hole, of the oil separation chamber is provided with an oil inlet hole; an engine oil filter screen is arranged in the oil separation cavity, and an oil guide channel with one end communicated with the oil separation cavity and the other end communicated with an oil inlet of the engine oil pump is arranged on the side of the oil separation cavity.

The utility model relates to a pulse type oil filter which comprises a machine shell, a filter element and a shell cover, an upper supporting plate is installed at the upper end of the filter element, an annular groove is formed in the shell cover, a plurality of oil inlet channels communicated with the annular groove are formed in the bottom of the shell cover, and adjusting valves are arranged in the oil inlet channels. Magnet blocks used for driving the adjusting valves are fixedly installed on the upper supporting plate and correspond to the adjusting valves in a one-to-one mode, and the adjusting valves are located under the oil inlet channel. According to the pulse type engine oil filter, the adjusting valve is arranged in the oil inlet channel, the adjusting valve is driven by matching with the magnet block arranged on the filter element, the flow / flow speed of engine oil flowing into the machine shell through the oil inlet channel can be dynamically adjusted, and therefore the filter element can keep up-down pulse type movement for a long time in the machine shell; therefore, large-scale impurity enrichment at a certain position of the filter element is effectively avoided, and the magnet block can also adsorb a part of iron-containing impurities; finally, the effects of effectively prolonging the service life of the filter element and reducing the replacement frequency of the filter element are achieved.

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 filter system (100) for a fluid, in particular oil or fuel, in particular of an internal combustion engine, comprising a filter housing (110) with a fluid inlet (102), a first fluid outlet (104), and a second fluid outlet (106), and comprising a main-flow filter element (10) arranged in the filter housing (110) and a bypass filter element (30) arranged in series therewith in the flow direction (82). The main-flow filter element (10) surrounds a central tube (14). The bypass filter element (30) is arranged in an element housing (34) with a central inlet tube (50) and a central outlet tube (52), wherein the element housing (34) has at least one outflow opening (54) for the fluid filtered by the bypass filter element (30). The element housing (34) is coupled to the central tube (14) of the main filter element (10) in a rotationally fixed manner about a longitudinal axis (80).The outlet pipe (52) is fluidly connected to the first fluid outlet (104) and the drain opening (54) is fluidly connected to the second fluid outlet (106). Furthermore, the invention relates to a filter element unit (1).

The invention discloses a double-filtration separation device and an engine oil filter comprising the same, and the double-filtration separation device comprises a separation ring, a filter element and a filter element, the separation cavity is coaxially formed in the separation ring in an annular form; the magnetic block and the granular activated carbon are positioned in the separation chamber; the inlet hole and the outlet hole are formed in the separation ring and are both communicated with the separation cavity; the filter screen is fixedly arranged at the outlet hole and is used for holding granular active carbon; wherein low-temperature engine oil containing impurities enters the separation cavity through the inlet hole and is discharged from the outlet hole after being subjected to double adsorption of the magnetic block and the granular activated carbon, and the discharged engine oil flows back through the bypass valve. The cover pole is fixedly arranged at the top of the shell; and the sealing ring is fixedly arranged on the cover pole. Engine oil directly impacts on the inner rings of the magnetic blocks and rotationally flows in the inner rings of the magnetic blocks, so that metal particles in the engine oil move towards the magnetic blocks, and the metal particles are magnetically adsorbed by the magnetic blocks more quickly in cooperation with magnetic adsorption of the magnetic blocks.

The invention belongs to the field of engine oil filter elements, and particularly relates to an engine oil diffusion filter element which comprises a framework, an upper end cover, a lower end cover and a filter paper layer, multiple groups of diffusion supports are further arranged between the framework and the filter paper layer and uniformly arranged around the framework, and the diffusion supports are supported at wave crests of the wavy filter paper layer. Inclined plane supporting parts are further arranged on the two sides of the flow dispersing bracket; and the inclined plane supporting parts are positioned on the two sides of the flow dispersing bracket and are used for supporting inclined planes on the two sides of a filter paper layer wave crest. When the outer side of the filter paper layer is filled with engine oil, the diffusion support is inserted into the fold of the filter paper layer to support the wavy structure of the filter paper layer, the situation that the diffusion capacity is weakened due to overlapping of the filter paper layers on the two sides is avoided, the diffusion support also plays a role in stabilizing the structure of the filter paper layer, deviation and rotation are avoided, and the service life of the filter paper layer is prolonged. And the service life of the filter element is prolonged.

The utility model relates to the field of engine oil filtering, and discloses a combined type engine oil filter which comprises an upper shell and a lower shell, a filter element is arranged between the upper shell and the lower shell, the upper shell is arranged above the lower shell, a dismounting assembly is arranged between the upper shell and the lower shell, the dismounting assembly comprises a limiting block, and the limiting block is arranged on the lower shell. The bottom end of the upper shell is fixedly connected with a connecting rod, the limiting block is fixedly connected to the bottom end of the connecting rod, the connecting rod is arranged to be in an L shape, and an annular groove is formed in the outer wall of the upper shell. According to the filter element, the guide ring is pulled upwards to drive the limiting rod to slide out of the limiting groove, at the moment, the upper shell can be rotated to drive the limiting block to rotate to slide out of the clamping groove and then move out of the first sliding groove, and therefore the upper shell and the lower shell which are combined can be detached and separated, and the filter element can be conveniently replaced without replacing all the filter elements; the cost is reduced, and the operation convenience and efficiency are improved.

The separation assembly comprises a centrifugal channel and a separation part, an inlet of the centrifugal channel is suitable for introducing an oil-gas mixture, the separation part is provided with a centrifugal separation cavity, an inlet of the centrifugal separation cavity is communicated with an outlet of the centrifugal channel, at least part of the centrifugal channel is in an arc shape, and the oil-gas separation effect is improved.

A fluid treatment device has an exchangeable treatment unit and a connection head. A bayonet-type connection device connects connection head and treatment unit to each other by a plug-in / rotation movement about a connection axis of the treatment device and is provided with a housing connection part and a head connection part that operatively engage each other to form a connection of the bayonet-type connection device. Housing connection part and head connection part each have a mutually complementary functional element extending circumferentially about the connection axis and operatively connectable to each other. The bayonet-type connection device has a pretension element for realizing a mechanical pretension pressing the functional elements against each other. The pretension element is a spring element with outwardly projecting spring arms with radially outer end faces provided with a straight section that is tangential to a rim extending in circular shape around the connection axis.

The invention relates to the technical field of filters, in particular to an engine oil filter for an engine, which comprises a barrel, a first filter assembly and a second filter assembly, the top of the barrel is open, a partition plate is detachably connected in the barrel and divides the barrel into a first chamber and a second chamber, and an oil outlet pipe is arranged in the barrel; the first filtering assembly comprises a connecting piece and a first filtering piece, the connecting piece comprises a connecting plate for closing the opening of the cylinder body, the connecting plate is detachably connected to the cylinder body, a plurality of oil inlet holes are formed in the connecting plate, the first filtering piece comprises a conical filter screen for filtering engine oil, and the conical filter screen is connected to the side, close to the interior of the cylinder body, of the connecting plate; the second filtering assembly comprises a second filtering piece, the second filtering piece comprises a filtering cylinder, the filtering cylinder is coaxially arranged on the outer wall of the oil outlet pipe, the oil passing hole is located in the outer side of the filtering cylinder, and an oil filtering hole is formed in the section, located in the filtering cylinder, of the side wall of the oil outlet pipe; the device has the effect that the conical filter screen and the filter cylinder are convenient to disassemble and replace.

The invention discloses an engine oil filter with a spiral spoiler. The engine oil filter comprises a bottom shell, an outer cover is fixedly connected to the bottom shell, a liquid inlet and a liquid outlet are formed in the bottom shell, a check valve is arranged on the liquid inlet, a connecting cylinder is fixedly connected into the liquid outlet, a filter element structure is fixedly connected to the connecting cylinder, and a bypass valve is arranged on the filter element structure; the flow guide assembly comprises a first spiral spoiler, the first spiral spoiler is located between the filter element structure and the outer cover, the first spiral spoiler is rotationally connected to the annular base, the bypass valve is fixedly connected with the annular base through a connecting mechanism, a supporting mechanism is fixedly connected into the outer cover, and a stop mechanism is arranged between the supporting mechanism and the annular base. Impurities of engine oil can be prevented from being gathered at a certain position, the use of a filtering part is more balanced, the durability of the device is improved, meanwhile, oil liquid can flow along the spoiler during operation, and large particles generate centrifugal force, so that the oil liquid is thrown to the wall surface and flows to the bottom along the spoiler, and the blockage degree of the filter element is reduced.

The utility model relates to the technical field of engine oil filters, and discloses a long-life engine oil filter which comprises a shell mechanism, a sealing cover mechanism is fixedly arranged on the upper end face of the shell mechanism, a first clamping mechanism is fixedly arranged on the lower end face of the sealing cover mechanism, and a filter cartridge mechanism is fixedly arranged on the lower end face of the first clamping mechanism. A second clamping mechanism is fixedly arranged on the lower end surface of the filter cartridge mechanism, and filter paper is clamped between the first clamping mechanism and the second clamping mechanism. According to the filter, the upper end and the lower end of the filter paper can be clamped and fixed in the clamping grooves and are adhered by using an adhesive, so that the adhesion strength of the filter paper can be greatly improved, and the service life of the filter is prolonged; and the magnetic attraction block can attract and collect metal impurities in unfiltered engine oil into the storage groove to prevent the metal impurities from scouring the filter paper to cause breakage of the filter paper, so that the filtering efficiency of the filter is improved.

The present disclosure provides an engine oil cooling structure of an engine. In the engine oil cooling structure of an engine, the engine includes a crankcase, the crankcase is provided with an oil filter mounting chamber having a cylindrical shape, the cooling structure includes a water channel, a water inlet of the water channel communicates with a water pump, the crankcase is further provided with a main oil channel, the crankcase is further provided with a heat conducting thin wall, an inner cavity of the heat conducting thin wall form the oil filter mounting chamber, the oil filter mounting chamber communicates with the main oil channel, the water channel is arranged around an outer side wall of the heat conducting thin wall, and a water outlet of the water channel communicates with a cooling water channel arranged in the same direction as and adjacent to the main oil channel.

The utility model provides a central engine oil control valve which comprises a valve shell, a valve sleeve and a valve element, an oil inlet is formed in the front end of the valve shell, and an oil outlet is formed in the rear end of the valve shell. The valve sleeve is coaxially arranged in the valve shell, a front oil cavity and a rear oil cavity are formed in the valve sleeve, the front oil cavity is communicated with the oil inlet, and the valve element is arranged in the rear oil cavity; the outer wall of the valve sleeve is sleeved with a radial one-way valve, the radial one-way valve is arranged close to the oil inlet hole, when the radial one-way valve contracts inwards in the radial direction, the oil inlet hole is closed, and when the radial one-way valve opens outwards in the radial direction, the oil inlet hole is opened; and the valve core is movably arranged in the rear oil cavity. According to the central engine oil control valve, the traditional peripheral oil charging mode is changed, so that the opening, closing and response speed of the radial one-way valve is not influenced and is smoother, the overall performance is improved, the structure is simple, and the cost is lower.

An oil separator (3) which separates gas and liquid in oil-containing air to recover oil-containing liquid, the oil separator (3) comprising: an inlet opening (15) which introduces air, an oil trap (40) which collects oil contained in air, a reservoir (48) which stores liquid flowing out of the oil trap (40), and a discharge opening (16) which discharges air from which oil has been removed, wherein the oil trap (40) includes a glass fiber filter (42) and an impact member (41) that captures oil particles by causing the oil particles to impact the impact member (41), characterized in that the impact member (41) is columnar and has air permeability and comprises a first surface (41a) through which air flows in and a second surface (41b) which is an outer peripheral surface (41b) through which air passing through the impact member (41) flows out, and the glass fiber filter (42) is provided on the outer peripheral surface (41b) of the impact member (41), wherein the glass fiber filter (42) is formed as a film and covers the entire outer peripheral surface (41b) of the impact member (41).

To suppress a water content in an engine while power is being supplied by a power supply device.SOLUTION: A vehicle includes an engine, an electric motor, a battery, a power supply device, and a control device. The battery allows power transfer between itself and the electric motor. The power supply device can supply power from the battery to the outside. The control device executes power supply processing for causing the power supply device to supply the power from the battery to the outside. The control device executes water content calculation processing for calculating a water content that is the amount of water staying in the engine, on the basis of an engine operational state. The control device executes power generation processing for operating the engine and causing the electric motor to generate power, on condition that the power supply processing is being executed, and that the water content is equal to or more than a prescribed amount. The control device executes air-fuel ratio adjustment processing for increasing an air-fuel ratio in the engine as compared to a case where the water content is less than the prescribed amount, on condition that the power generation processing is being executed.SELECTED DRAWING: Figure 3

Filtering device (1), in particular fuel filter or lubrication filter, - with a filter housing (2), - with a ring filter insert (3) arranged in the filter housing (2) and comprising a filter medium (4), - with a water separator (6) arranged in the filter housing (2), preferably below the ring filter insert (3), which has a through-opening (7) through which a mounting sleeve (5) arranged in the filter housing (2) passes, - wherein the water separator (6) has a hydrophobic membrane (13) that is permeable to fuels and lubricants and separates a raw side (14) of the water separator (6) from a clean side (15), - wherein the water separator (6) comprises a bypass device (16) which provides a fluid connection between the raw side (14) and the clean side (15) by bypassing the membrane (13), characterized in that - the water separator (6) is designed in a pot-like shape and comprises a pot base (10) from which a pot collar (11) projects radially outwards, on which the membrane (13) of the water separator (6) is arranged, - the pot base (10) is ring-shaped and surrounds the through-opening (7) through which the fastening sleeve (5) extends, - the pot base (10) for sealing the raw side (14) against the clean side (15) comprises a sealing device (17) enclosing the through-opening (7) and supported on the mounting stud (5), - the bypass device (16) is part of the sealing device (17).

The utility model relates to the technical field of engines, and discloses an engine oil bubble eliminating device, an external engine oil tank and an engine system.The engine oil bubble eliminating device comprises a bubble eliminating bin body which extends in the first direction, and an oil passing opening is formed in a bottom plate of the bubble eliminating bin body; the first end of the oil return pipe is communicated with the engine body, and the second end is communicated with the inner cavity; in the first direction, the inner wall of the side, deviating from the oil return pipe, of the defoaming bin body is a first arc-shaped inner wall, and the first arc-shaped inner wall sinks towards the side deviating from the oil return pipe. In the working process, engine oil enters from the first end of the oil return pipe and is sprayed out from the second end until the engine oil makes contact with the first arc-shaped inner wall and then continues to flow at a high speed in the extending direction of the first arc-shaped inner wall, so that rotational flow is formed, and a large number of bubbles in the engine oil are eliminated under the action of centrifugal force; and finally, the engine oil flows into the external engine oil tank body through the oil passing port, so that bubbles contained in the engine oil during oil return can be greatly eliminated, and faults such as oil injection of the oil-gas separator are effectively reduced.

An oil filter reservoir comprising: a reservoir housing (102); a filter (104) within the housing (102) dividing the housing (102) into an oil inlet chamber (112) and an oil outlet chamber (114); a housing inlet in communication with the inlet chamber (112); a housing outlet (110) in communication with the outlet chamber (114); wherein the filter (104) includes a permeable wall (116) and a bypass valve (118), the bypass valve (118) opening in response to higher oil pressure and volume in the inlet chamber (112) to allow a portion of the oil to bypass the permeable wall (116) and be released from the bypass valve (118) into a bypass chamber (104);anda baffle (106) in the outlet chamber (114), the baffle (106) being spaced from the bypass valve (118), the baffle (106) further separating the outlet chamber (114) into a reserve chamber (202) and the bypass chamber (204), the baffle (106) including openings (206) allowing limited oil flow therethrough between the bypass chamber (204) and the reserve chamber (202), the housing outlet (110) and the bypass valve (118) being in fluid communication with the bypass chamber (204);

The invention relates to an oil pump, an engine and a motorcycle. The oil pump comprises a pump body and a pressure relief device. An oil inlet cavity, an oil outlet cavity and an exhaust structure are arranged in the pump body. The pressure release valve comprises a valve body, a valve element and an elastic piece connected with the valve body, the valve body is connected with the pump body, a cavity, a first exhaust hole, a second exhaust hole, an oil inlet and an oil outlet are formed in the valve body, the first exhaust hole, the second exhaust hole, the oil inlet and the oil outlet can be communicated with the cavity, and the valve element can reciprocate in the cavity so as to be switched between the first position and the second position. When the valve element is located at the first position, the valve element blocks a passage between the oil inlet and the oil outlet and enables the first exhaust hole to be communicated with the second exhaust hole through the cavity. When the valve element is located at the second position, the valve element opens a passage between the oil inlet and the oil outlet and blocks a passage between the first exhaust hole and the second exhaust hole. The engine oil pump can effectively prevent engine oil from leaking at the exhaust structure, and is favorable for improving the power performance of an engine and the overall performance of a motorcycle.

The utility model discloses an improved oil duct structure of an engine oil filtering base assembly in an automobile, which comprises an engine oil filtering base, and an engine oil inlet, an engine oil outlet and an oil return port are arranged on the lower portion of the engine oil filtering base. An anti-freezing liquid inlet is formed in the end of the engine oil filtering base, a first water outlet and a second water outlet which are communicated with the anti-freezing liquid inlet are formed in the bottom of the engine oil filtering base, a filter element and a bypass valve are installed in one end of the engine oil filtering base, and a filtering cover is connected to the end, close to the bypass valve, of the engine oil filtering base. An engine oil cooler is installed on the upper portion of the end, away from the filter element, of the engine oil filtering base. An end face inclined hole main oil duct communicated with the internal oil duct is formed in the front side face of the engine oil filtering base. The engine oil auxiliary supply device has the advantages of being novel in structure, achieving auxiliary supply of engine oil of an engine, accelerating cooling and oil way connection through the newest auxiliary oil way additionally arranged on the upper end face of the base as carrier connection, prolonging the service life of products, reducing the market failure rate of the products and improving the product quality of the products.

The application discloses an engine oil cooler arrangement system, wherein an oil cooler is internally provided with a water channel and an oil channel, the front end of the oil cooler is provided with a water pump, a tension pulley and a thermostat seat mounting port, the thermostat seat mounting port is mounted with a thermostat seat, and an engine water inlet, a cylinder head water inlet and an oil inlet and outlet are arranged on the oil cooler in a mutually connected manner below the thermostat seat. The oil filter is arranged at a far end through a pipeline, so that the maintenance of the oil filter is facilitated; the water channel and the oil channel in the oil cooler are both extended and arranged, the flowing time of the oil in the oil cooler is prolonged under the premise of guaranteeing the fluidity of the oil, the heat exchange is uniform, and the heat of the oil is more beneficial to be taken away; the oil cooler integrates the water pump and the tension pulley, the oil filter is arranged at the far end, more operable space is provided for the outside of the engine body, and the integration and compactness are improved.

The utility model discloses an engine metal screen, which belongs to the technical field of engine accessories and comprises a metal screen body with four corners respectively provided with mounting holes and guard plate frames respectively arranged on the upper side and the lower side of the metal screen body, and the two guard plate frames are matched to clamp and wrap the outer edge of the metal screen body. Through holes corresponding to the four mounting holes of the metal screen body are formed in the protection plate frame in the thickness direction of the protection plate frame; the outer edge of the metal screen body is fixedly connected with the protection plate frames on the two sides of the metal screen body in a welded mode, and the edges of the four installation holes of the metal screen body are fixedly connected with the protection plate frames around the through holes in the two sides of the metal screen body in a welded mode. The device can effectively prevent the steel wire from falling off, prevents the steel wire from being mixed into engine oil, and improves the safety in the operation process of an engine.

It is a filter device with a filter housing (14) consisting of a housing pot (12) receiving a replaceable filter element (16), which is closed by a removable lid part (32), wherein the element material (20) of the filter element (16) separates an unfiltrate (22) from a filtrate space (18, 43), and with a measurement acquisition device (108) for acquiring pressure values ​​from at least one of the spaces (18, 22, 43), which is characterized in that the measurement acquisition device (108) is arranged on an inner surface (45) of the lid part (32) and is guided at least partially in it, projecting into the filter housing (14), and that at least parts of a measurement evaluation device (78) connected to the measurement acquisition device (108) are arranged on the opposite outer surface (42) of the lid part (42) facing the environment.

The present application relates to the field of oil filter, especially to a self-cleaning anti-clogging oil filter and method thereof, comprising: an oil shell, the bottom end of the oil shell is fixedly connected with a bottom plate, a plurality of notches are arranged in an annular array on the bottom plate, a filter cartridge is installed on the bottom plate, a filter core is sleeved on the filter cartridge, a top plate is arranged at the top end of the filter cartridge, and a check valve is arranged at the top end of the top plate, the filter core is blocked, the sealing cover moves downward under the action of oil pressure, the sealing of the filter net barrel is cancelled, the unfiltered oil flows into the filter cartridge through the filter net barrel, the impurities in the oil are filtered, the damage to the engine is avoided, when the engine stops working, the oil pressure decreases, the sealing cover is reset upward under the restoring force of the first spring, the filter net barrel is resealed, and the filtered impurities are sealed between the sealing cover and the filter net barrel, so that the impurities are prevented from falling on the filter core again.

According to the technical scheme, the automatic pressure regulating type engine oil filter comprises a protective cylinder, an oil outlet pipe is inserted in the middle of the interior of the protective cylinder in a sealed mode, a plurality of oil inlet holes located in the periphery of the oil outlet pipe are formed in the top of the protective cylinder at equal angles, and a filter cylinder is fixed to the middle of the interior of the protective cylinder. The oil outlet pipe extends into the bottom of the filter cartridge, filter paper is inserted outside the filter cartridge, the upper portion of the filter paper is inclined, the outer diameter of the top of the filter paper is smaller than that of the lower portion of the filter paper, the circle centers of the oil inlet holes are located on the outer diameter of the lower portion of the filter paper, and the radius of the oil inlet holes is equal to the outer diameter difference of the top and the lower portion of the filter paper. Due to the fact that the inclined portion of the upper portion of the filter paper and the circle center of the oil outlet are located on the outer diameter of the lower portion of the filter paper, part of engine oil can be directly filtered into the filter cylinder through impact force generated by falling through the inclined portion when the engine oil enters the protective cylinder through the oil inlet, and the filtering speed is increased under the condition that the filtering effect is not affected.

The utility model discloses a pre-filtering device, an oil-gas separator and an engine, the pre-filtering device comprises a shell, a pre-filtering structure and a water removal structure, the pre-filtering structure is used for separating oil in waste gas, and the water removal structure is used for removing water in the waste gas. The pre-filtering device disclosed by the scheme is integrated with the water removal structure and is used for removing water from the waste gas before entering the oil-gas separator and reducing moisture in the waste gas, so that moisture entering the oil-gas separator along with the waste gas is reduced, the risk that engine oil is emulsified in the oil-gas separator is reduced, corrosion of the oil-gas separator caused by engine oil emulsification is reduced, and the service life of the oil-gas separator is prolonged. And the effect of prolonging the service life of the oil-gas separator is achieved.