CN207761750U

CN207761750U - Crankcase ventilation system

Info

Publication number: CN207761750U
Application number: CN201721902334.3U
Authority: CN
Inventors: 凌青海; 李金印; 刘德瑶; 陈浩
Original assignee: Chongqing Sokon Industry Group Co Ltd
Current assignee: Chongqing Sokon Industry Group Co Ltd
Priority date: 2017-12-29
Filing date: 2017-12-29
Publication date: 2018-08-24
Anticipated expiration: 2027-12-29

Abstract

The utility model discloses a kind of crankcase ventilation system, including crankcase, gray iron and cylinder head cover, the cylinder head cover is equipped with the exhaust side gs-oil separator and air inlet side gs-oil separator of its corresponding exhaust side and air inlet side setting；The exhaust side gs-oil separator is communicated in engine air inlet tube by the first two-way air hose, and the air inlet side gs-oil separator is communicated in inlet manifold by the second two-way air hose；The crankcase is equipped with the first ventilation opening and the second ventilation opening, and first ventilation opening is connected to by pressurizating ventilation pipe with exhaust side gs-oil separator, and second ventilation opening is connected to by non pressurized ventilation duct with air inlet side gs-oil separator；The pressurizating ventilation pipe is at least partly integrally provided on cylinder interior；The utility model can reduce the whole occupied space of engine, reduce assembly work, improve production efficiency, while reducing gas leakage risk when ventilation, and improve response speed, and the pressure balance of crankcase is better achieved.

Description

Crankcase ventilation system

Technical field

The utility model is related to technical field of engines, more particularly to a kind of crankcase ventilation system.

Background technology

Automobile engine has combustion mixture in operation process and exhaust gas enters crankcase, is dissolved in machine oil, makes Oil dilution, degradation, the pollutants such as particle contained in exhaust gas are mixed with machine oil, are kept machine oil rotten, are corroded parts；Together When engine operating generate heat, machine oil volatilization, crankcase internal pressure increase, machine oil can from crankcase oil seal etc. ooze out flow It loses, machine oil loss can cause oil consumption excessive, and the steam that machine oil volatilization generates can also pollute air.Therefore, it sends out Motivation is all removed crankcase gas blowby, is prevented machine oil from going bad, gradually consumption of lubricating oil, reduction discharge less using crankcase ventilation system Deng.

In existing crankcase ventilation system, gs-oil separator is generally disposed in engine air cylinder cap, and by logical Air hose connection crankcase flows downwardly into cylinder for receiving the oil gas in bent axle by the machine oil that gs-oil separator is isolated In lid, divides the gas flow inlet manifold listed and enter eventually into cylinder body and burn, the oil gas point of this structure type It is suitable only for naturally aspirated engine from system, for turbocharged engine, since the pressure in inlet manifold is larger, oil The gas that gas separating device is isolated can not be pressed into inlet manifold.For this purpose, applicant is it is proposed that a kind of being suitable for turbocharging hair The engine with supercharger oil and gas separating system (CN105257367A) of motivation；However, in the system, due to pressurizating ventilation pipe and non-increasing Pressure ventilation duct is all made of external pipeline mode and designs, and this mode causes engine overall volume to increase, and the occupancy of engine is empty Between it is larger, also, since the design method of external pipeline needs the quality of stringent control part, otherwise be easy to cause gas leakage, leakage Oil increases maintenance cost and manufacturing cost.

It is therefore desirable to which a kind of crankcase ventilation system, can reduce the whole occupied space of engine, assembler is reduced When, production efficiency is improved, while reducing gas leakage risk when ventilation, and improve response speed, the pressure of crankcase is better achieved Dynamic balance.

Utility model content

In view of this, the purpose of this utility model is to provide a kind of crankcase ventilation system, engine can be reduced Whole occupied space reduces assembly work, improves production efficiency, while reducing gas leakage risk when ventilation, and improves response speed Degree, is better achieved the pressure balance of crankcase.

The crankcase ventilation system of the utility model, including crankcase, gray iron and cylinder head cover, on the cylinder head cover Exhaust side gs-oil separator and air inlet side gs-oil separator equipped with its corresponding exhaust side and air inlet side setting；The exhaust side oil Gas separating device is communicated in engine air inlet tube by the first two-way air hose, and the air inlet side gs-oil separator is two-way by second Ventilation duct is communicated in inlet manifold；The crankcase is equipped with the first ventilation opening and the second ventilation opening, and first ventilation opening is logical It crosses pressurizating ventilation pipe to be connected to exhaust side gs-oil separator, second ventilation opening passes through non pressurized ventilation duct and air inlet side oil gas Separator is connected to；The pressurizating ventilation pipe is at least partly integrally provided on cylinder interior.

Further, the pressurizating ventilation pipe includes the pipe for being integrally provided on the pipe I of cylinder interior and being integrally provided on inside cylinder cap II, the pipe I is connected with pipe II.

Further, the non pressurized ventilation duct is at least partly integrally provided on cylinder interior.

Further, the non pressurized ventilation duct includes being integrally provided on the pipe III of cylinder interior and being integrally provided on inside cylinder cap Pipe V, the pipe III are connected with pipe IV.

Further, the second two-way air hose is at least partly integrally provided on inside cylinder cap.

Further, the second two-way air hose includes the pipe V being integrally provided on inside cylinder cap and is integrally provided on cylinder interior Pipe VI, the pipe V is connected with pipe VI.

Further, the first two-way air hose inner end is connected to exhaust side gs-oil separator, outside the first two-way air hose End is connected to the pipeline for being located at booster upstream in engine air inlet tube.

Further, the second two-way air hose inner end is connected to air inlet side gs-oil separator, outside the second two-way air hose End is connected to the pipeline for being located at charge air cooler downstream in inlet manifold.

Further, the inlet manifold includes manifold body and charge air cooler；Air intake duct, cooling are equipped in the manifold body Chamber and gas off-take, gas off-take are communicated by cooling chamber with air intake duct；The charge air cooler includes being fixed on cooling chamber by fastener Open-mouth panel and the core that is inserted into cooling chamber, the core be fixed on the inside of panel；The core is by bindiny mechanism The cavity wall of cooling chamber is fixed in support, and the gap between bindiny mechanism partition core cooling chamber cavity wall is to form sealing knot Structure；The bindiny mechanism includes the seal groove for being fixed on the connecting plate of core and being fixed on cooling chamber cavity wall, at least partly described Connecting plate is inserted into seal groove and seals fixation.

Further, the longitudinal section of the connecting plate is L-shaped and includes the transverse slat and riser being connected, and the riser is fixed On the inside of core, the transverse slat is inserted into seal groove and seals fixation；Flexible seals, the transverse slat are equipped in the seal groove It is inserted into seal groove and squeezes flexible seals so that seal groove forms sealing structure；The flexible seals are that longitudinal section is in " U " The rubber pad of shape, the transverse slat are inserted into the groove of flexible seals after being inserted into seal groove and are wrapped up by flexible seals；It is described The cavity wall of cooling chamber extends outwardly to form the " U "-shaped convex block in longitudinal section, the hollow formation seal groove in convex block inner cavity.

The beneficial effects of the utility model：

The crankcase ventilation system of the utility model, pressurizating ventilation pipe are at least partly integrally provided on cylinder interior, that is, use Internal duct substitutes external pipeline can reduce the whole occupied space of engine to reduce the use of external pipeline, drop Low assembly work, improves production efficiency, while reducing gas leakage risk when ventilation, and can shorten length of pipe, carries High ventilation response speed, is better achieved the pressure balance of crankcase.

Description of the drawings

The utility model is further described with reference to the accompanying drawings and examples：

Fig. 1 is operating diagram of the utility model under boost mode；

Fig. 2 is operating diagram of the utility model under no charge mode；

Fig. 3 is the front view of the inlet manifold of the utility model；

Fig. 4 is A-A sectional views in Fig. 3；

Fig. 5 is enlarged diagram at B in Fig. 4；

Fig. 6 is the stereogram of the inlet manifold of the utility model.

Specific implementation mode

As shown in Figures 1 to 6：The crankcase ventilation system of the present embodiment, including crankcase 1, cylinder body 2, cylinder cap 3 and cylinder cap Cover 4, the cylinder head cover 4 are equipped with the exhaust side gs-oil separator 51 and air inlet side oil gas of its corresponding exhaust side and air inlet side setting Separator 52；The exhaust side gs-oil separator 51 is communicated in engine air inlet tube 7 by the first two-way air hose 61, it is described into Gas side gs-oil separator 52 is communicated in inlet manifold 8 by the second two-way air hose 62；The crankcase 1 is equipped with the first ventilation Mouth and the second ventilation opening, first ventilation opening are connected to by pressurizating ventilation pipe 9 with exhaust side gs-oil separator 51, and described second Ventilation opening is connected to by non pressurized ventilation duct 10 with air inlet side gs-oil separator 52；The pressurizating ventilation pipe 9 is at least partly integrally Inside cylinder body 2；Pressurizating ventilation pipe 9 is at least partly integrally provided on inside cylinder body 2, that is, uses internal duct to substitute extension tube attached Road can reduce the whole occupied space of engine, reduce assembly work to reduce the use of external pipeline, improve Production efficiency, while reducing gas leakage risk when ventilation, and length of pipe can be shortened, ventilation response speed is improved, The pressure balance of crankcase 1 is better achieved.

(arrow show airflow direction) as depicted in figs. 1 and 2：When engine is in no charge mode, in crankcase 1 Oil gas air inlet side gs-oil separator 52 entered by non pressurized ventilation duct 10 carry out Oil-gas Separation, the gas for detaching completion is logical It crosses the second two-way air hose 62 to enter in motor intake manifold 8, is eventually introduced in combustion chamber and burns；When crankcase 1 When interior air pressure is relatively low, the gas in engine air inlet tube 7 passes through the first two-way air hose 61 and enters exhaust side gs-oil separator 51 It is interior, and flowed into crankcase 1 by pressurizating ventilation pipe 9；When engine is in boost mode, oil gas in crankcase 1 can be into Enter in 2 gs-oil separator (not shown) of cylinder body and carry out initial gross separation, the gas isolated is entered by pressurizating ventilation pipe 9 to be arranged Gas side gs-oil separator 51 carries out secondary separation (or exhaust side gs-oil separator 51 is directly entered without initial gross separation), The gas isolated is entered by the first two-way air hose 61 in engine air inlet tube 7, and final by worm wheel pressure booster 12 It flows into engine combustion room；When air pressure is too low in crankcase 1, the gas in inlet manifold 8 passes through the second two-way air hose 62 enter in air inlet side gs-oil separator 52, and are flowed to 4 exhaust side of valve mechanism cover, enter bent axle by non pressurized ventilation duct 10 In case 1, realize to 1 ftercompction of crankcase.

The two-way Pcv valve 11 for controlling the gas flow for passing through the pipeline is provided in second two-way air hose 62, it should Two-way Pcv valve 11 is in normally open, and air-flow can two-way flow, and when air-flow velocity (no matter from the top down or from When down upwards) excessively high, throttling action can be played, since under boost mode, the air pressure of motor intake manifold 8 is larger, is Avoid excessive gas by the second ventilation duct to 1 tonifying Qi of crankcase, therefore, when air-flow is from inlet manifold 8 to air inlet side oil gas When separator 52 flows, 11 aperture of two-way Pcv valve reduces, and avoids to 1 excessive tonifying Qi of crankcase under boost mode, in non pressurized mould Under formula, the gas isolated by air inlet side gs-oil separator 52 needs to flow to inlet manifold 8 by the second two-way air hose 62, this When, to avoid air flow rate excessive, 11 aperture of two-way Pcv valve reduces.

In the present embodiment, the pressurizating ventilation pipe 9 includes being integrally provided on the pipe I inside cylinder body 2 and being integrally provided in cylinder cap 3 The pipe II in portion, the pipe I are connected with pipe II；Make the sealing docking of I pipe II of pipe in assembling, convenient for assembly；The increasing of the structure Pressure ventilation duct 9 is integrally provided in cylinder body 2 and cylinder cap 3, to further reduce the use of external pipeline, can reduce engine Whole occupied space, reduce assembly work, improve production efficiency, while reducing gas leakage risk when ventilation, and can To shorten length of pipe, ventilation response speed is improved, the pressure balance of crankcase 1 is better achieved.

In the present embodiment, based on principle same as described above, the non pressurized ventilation duct 10 is at least partly integrally provided on cylinder Inside body 2；And preferably, the non pressurized ventilation duct 10 is including being integrally provided on the pipe III inside cylinder body 2 and being integrally provided on cylinder cap 3 Internal pipe V, the pipe III are connected with pipe IV；Pipe I, pipe II, pipe III and pipe IV can when cylinder body 2, cylinder cap 3 are cast integrally at Type, manufacture easy to process；Similarly, the second two-way air hose 62 is at least partly integrally provided on inside cylinder cap 3；And preferably, The second two-way air hose 62 includes the pipe VI for being integrally provided on the pipe V inside cylinder cap 3 and being integrally provided on inside cylinder body 2, described Pipe V is connected with pipe VI.

In the present embodiment, 61 inner end of the first two-way air hose is connected to exhaust side gs-oil separator 51, and first is two-way 61 outer end of ventilation duct is connected to the pipeline for being located at booster upstream in engine air inlet tube 7；Engine starts under pressurized state The pressure that machine air inlet pipe 7 is located in the pipeline of worm wheel pressure booster upstream is relatively small, ensures what the separation in cylinder head cover 4 was completed Gas can smoothly enter into air inlet pipe, eventually lead to participate in burning in cylinder body 2.

In the present embodiment, 62 inner end of the second two-way air hose is connected to air inlet side gs-oil separator 52, and second is two-way 62 outer end of ventilation duct is connected to the pipeline for being located at charge air cooler downstream in inlet manifold 8；Engine under pressurized state, engine into Pressure is higher in the pipeline of charge air cooler downstream in gas manifold 8, and can a part of gas cylinder head be pressed by the pressure To 1 tonifying Qi of crankcase in cover 4 and by non pressurized ventilation duct 10, ensure pressure balance in crankcase 1.

In the present embodiment, as shown in Figures 3 to 6, the inlet manifold 8 includes manifold body and charge air cooler；The manifold Air intake duct 81, cooling chamber 82 and gas off-take 83 are equipped in ontology, gas off-take 83 is communicated by cooling chamber 82 with air intake duct 81；It is described Charge air cooler includes the core 86 in the panel 85 and insertion cooling chamber 82 of the open-mouth for being fixed on cooling chamber 82 by fastener 84, The core 86 is fixed on 85 inside of panel；The core 86 is fixed on the cavity wall 82a of cooling chamber 82 by bindiny mechanism's support, and Gap between 86 cooling chamber of bindiny mechanism's partition core, 82 cavity wall 82a is to form sealing structure；In the panel of charge air cooler 85 on the basis of the connection of fastener 84 by increasing bindiny mechanism, and the both ends of charge air cooler are fixed, and charge air cooler is improved Installation strength effectively prevent charge air cooler Cracking Failure；Between bindiny mechanism separates between 86 cooling chamber of core, 82 cavity wall 82a simultaneously Gap enhances the leakproofness between charge air cooler and the cavity wall 82a of cooling chamber 82 to form sealing structure, prevent high-temperature gas without It crosses charge air cooler cooling and passes through, ensure inlet gas cooling effect.

In the present embodiment, the bindiny mechanism includes being fixed on the connecting plate of core 86 and being fixed on 82 cavity wall of cooling chamber The seal groove 87 of 82a, at least partly described connecting plate are inserted into seal groove 87 and seal fixation；Connecting plate coordinates with seal groove 87 Plug in construction convenient for connection, improve efficiency of assembling, while the stable connection degree of connecting plate is high, can effectively fix core 86, Effectively play the effect of sealing and damping.

In the present embodiment, the longitudinal section of the connecting plate is L-shaped and includes the transverse slat 88 being connected and riser 89, described Riser 89 is fixed on 86 inside of core, and the transverse slat 88 is inserted into seal groove 87 and seals fixation；Transverse slat 88 hangs down with 89 phase of riser Directly；Riser 89 can by rivet, be spirally connected or integrated mode be set to 86 medial surface of core；When transverse slat 88 is located at 89 bottom of riser When portion or top, connecting plate is L-shaped；When transverse slat 88 be located at riser 89 it is intermediate when, then part is L-shaped for connecting plate；It is preferred that Ground, transverse slat 88 are located at 89 bottom of riser, close to windward side, to reach and preferably stop draught effect；Transverse slat 88 and riser 89 1 It is body formed, in order to machine-shaping, while improving the structural strength of connecting plate；To reach sufficient sealing effect, transverse slat 88 Length is not less than the length of core 86.

In the present embodiment, flexible seals 810 are equipped in the seal groove 87, the transverse slat 88 is inserted into seal groove 87 and squeezes Press flexible seals 810 so that seal groove 87 forms sealing structure；Flexible seals 810 can effective plug for seal slot 87 gas Circulation road, to reach sufficient sealing effect, the simple in structure and sealed reliable；Preferably, the flexible seals 810 are The " U "-shaped rubber pad in longitudinal section, the transverse slat 88 are inserted into the groove of flexible seals 810 after being inserted into seal groove 87 and by soft Property sealing element 810 wrap up, the lateral surfaces of flexible seals 810 is in close contact with seal groove 87, which can also further carry The bonding strength and damping effect of high connecting plate.

In the present embodiment, the cavity wall 82a of the cooling chamber 82 extends outwardly to form the " U "-shaped convex block 811 in longitudinal section, institute State the hollow formation seal groove in 811 inner cavity of convex block 87；Using the structure, the cavity wall 82a of cooling chamber 82 is smooth structure, and riser 89 can It is in close contact with cavity wall 82a, to improve the stable degree of charge air cooler, and improves the leakproofness and damping effect of bindiny mechanism.

In the present embodiment, the fastener 84 is fastening bolt, if the open-mouth of the panel 85 and cooling chamber 82 is equipped with The dry screw hole 812 being adapted to fastening bolt；The quantity of screw hole 812 can be set as needed；The structure is convenient for the installation of charge air cooler And dismounting, and stable connection degree is high.

In the present embodiment, the charge air cooler further includes two cooling pipe fittings 813 for being fixed on panel 85, the core 86 Interior to be equipped with for the coolant flow channel for cooling down media flow and being communicated with two cooling pipe fittings 813, the coolant flow channel is circuitous Return meander-shaped；In two cooling pipe fittings 813, one is used to enter for cooling medium stream, another is used for for cooling medium stream Go out, cooling medium flows in coolant flow channel；The structure makes charge air cooler and air effect time long, effectively improves cooling effect Fruit.

Finally illustrate, above example is merely intended for describing the technical solutions of the present application, but not for limiting the present application, although ginseng The utility model is described in detail according to preferred embodiment, it will be understood by those of ordinary skill in the art that, it can be to this The technical solution of utility model is modified or replaced equivalently, without departing from the objective and model of technical solutions of the utility model It encloses, should all cover in the right of the utility model.

Claims

1. a kind of crankcase ventilation system, including crankcase, gray iron and cylinder head cover, the cylinder head cover, which is equipped with, corresponds to it The exhaust side gs-oil separator and air inlet side gs-oil separator of exhaust side and air inlet side setting；The exhaust side gs-oil separator is logical It crosses the first two-way air hose and is communicated in engine air inlet tube, the air inlet side gs-oil separator is connected to by the second two-way air hose In inlet manifold；The crankcase is equipped with the first ventilation opening and the second ventilation opening, and first ventilation opening passes through pressurizating ventilation Pipe is connected to exhaust side gs-oil separator, and second ventilation opening is connected by non pressurized ventilation duct and air inlet side gs-oil separator It is logical；It is characterized in that：The pressurizating ventilation pipe is at least partly integrally provided on cylinder interior.

2. crankcase ventilation system according to claim 1, it is characterised in that：The pressurizating ventilation pipe includes being integrally provided on The pipe I of cylinder interior and the pipe II being integrally provided on inside cylinder cap, the pipe I are connected with pipe II.

3. crankcase ventilation system according to claim 2, it is characterised in that：The non pressurized ventilation duct at least partly one Body is set to cylinder interior.

4. crankcase ventilation system according to claim 3, it is characterised in that：The non pressurized ventilation duct includes integrally setting Pipe III in cylinder interior and the pipe V that is integrally provided on inside cylinder cap, the pipe III are connected with pipe IV.

5. crankcase ventilation system according to any one of claims 1 to 4, it is characterised in that：Described second is bidirectional ventilated Pipe is at least partly integrally provided on inside cylinder cap.

6. crankcase ventilation system according to claim 5, it is characterised in that：The second two-way air hose includes one Pipe V inside cylinder cap and the pipe VI for being integrally provided on cylinder interior, the pipe V are connected with pipe VI.

7. crankcase ventilation system according to any one of claims 1 to 4, it is characterised in that：Described first is bidirectional ventilated Pipe inner end is connected to exhaust side gs-oil separator, and the first two-way air hose outer end, which is connected in engine air inlet tube, is located at booster The pipeline of upstream.

8. crankcase ventilation system according to claim 7, it is characterised in that：The second two-way air hose inner end connection In air inlet side gs-oil separator, the second two-way air hose outer end is connected to the pipeline for being located at charge air cooler downstream in inlet manifold.

9. crankcase ventilation system according to any one of claims 1 to 4, it is characterised in that：The inlet manifold includes Manifold body and charge air cooler；Be equipped with air intake duct, cooling chamber and gas off-take in the manifold body, gas off-take by cooling chamber with into Air flue communicates；The charge air cooler includes the core in the panel and insertion cooling chamber of the open-mouth for being fixed on cooling chamber by fastener Body, the core are fixed on the inside of panel；The core is fixed on the cavity wall of cooling chamber, and the connection by bindiny mechanism's support Mechanism separates the gap between core cooling chamber cavity wall to form sealing structure；The bindiny mechanism includes the company for being fixed on core Fishplate bar and the seal groove for being fixed on cooling chamber cavity wall, at least partly described connecting plate are inserted into seal groove and seal fixation.

10. crankcase ventilation system according to claim 9, it is characterised in that：The longitudinal section of the connecting plate is L-shaped And include the transverse slat and riser being connected, the riser is fixed on the inside of core, and the transverse slat is inserted into seal groove and seals solid It is fixed；Flexible seals are equipped in the seal groove, the transverse slat is inserted into seal groove and squeezes flexible seals so that sealing flute profile At sealing structure；The flexible seals are the " U "-shaped rubber pad in longitudinal section, and the transverse slat is inserted into flexibility after being inserted into seal groove The groove of sealing element is simultaneously wrapped up by flexible seals；The cavity wall of the cooling chamber extends outwardly, and to form longitudinal section " U "-shaped Convex block, the hollow formation seal groove in convex block inner cavity.