CN105697118A - Sealing structure of turbo-charged direct injection engine exhaust system - Google Patents

Sealing structure of turbo-charged direct injection engine exhaust system Download PDF

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Publication number
CN105697118A
CN105697118A CN201610051350.XA CN201610051350A CN105697118A CN 105697118 A CN105697118 A CN 105697118A CN 201610051350 A CN201610051350 A CN 201610051350A CN 105697118 A CN105697118 A CN 105697118A
Authority
CN
China
Prior art keywords
sealing
sealing gasket
flange
exhaust
sealed groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610051350.XA
Other languages
Chinese (zh)
Inventor
王凤娟
胡春林
刘彦华
王建锋
余锴
胡清池
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Changan Automobile Co Ltd
Original Assignee
Chongqing Changan Automobile Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chongqing Changan Automobile Co Ltd filed Critical Chongqing Changan Automobile Co Ltd
Priority to CN201610051350.XA priority Critical patent/CN105697118A/en
Publication of CN105697118A publication Critical patent/CN105697118A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1827—Sealings specially adapted for exhaust systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • F01N13/1844—Mechanical joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
    • F16J15/0818—Flat gaskets
    • F16J15/0825—Flat gaskets laminated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
    • F16J15/0818—Flat gaskets
    • F16J2015/0875—Flat gaskets comprising welds

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Exhaust Silencers (AREA)

Abstract

The invention discloses a sealing structure of a turbo-charged direct injection engine exhaust system. The sealing structure comprises a cylinder head flange, sealing gaskets and an exhaust manifold flange. The cylinder head flange is provided with a plurality of exhaust outlets, the sealing gaskets are provided via holes correspondingly, and the exhaust manifold flange is provided with air duct openings as many as the exhaust outlets. Sealing grooves are formed in the edges, corresponding to the exhaust outlets, of the cylinder head flange, and the number of the sealing gaskets is equal to the number of the exhaust outlets. The sealing gaskets are matched with the end faces of the sealing grooves in shape. Exhaust pipes are arranged on the edges, corresponding to the air duct openings, of the exhaust manifold flange, the height of each exhaust pipe is equal to the depth of the corresponding sealing groove, and an inner hole of each exhaust pipe corresponds to the corresponding air duct opening. The sealing gaskets are mounted in the sealing grooves, the exhaust pipes stretch into the sealing grooves, press the sealing gaskets and are in clearance fit with the sealing grooves, the exhaust outlets, the via holes, the inner holes and the air duct openings communicate with one another correspondingly, and the cylinder head flange and the exhaust manifold flange are connected through bolts and nuts. By means of the sealing structure, the bolts can be prevented from being broken, and the sealing gaskets are protected against seal failures.

Description

A kind of sealing structure of supercharged direct-injection engine gas extraction system
Technical field
The invention belongs to engine exhaust system field, be specifically related to the sealing structure of a kind of supercharged direct-injection engine gas extraction system。
Background technology
As shown in Figure 1, the sealing structure of existing engine exhaust system includes cylinder cap flange 1, sealing gasket 2 and air discharging manifold flange 3, the edge of cylinder cap flange 1 has multiple cylinder bolt connecting hole 14, cylinder cap flange 1 offers four air vents 11, sealing gasket 2 is integral type flange arrangement, by upper strata wavy metal substrate, metallic intermediate layer ripple substrate and the welding of lower metal ripple substrate are constituted, the edge of sealing gasket 2 has multiple sealing gasket bolt connecting hole 25 corresponding with cylinder bolt connecting hole 14, sealing gasket 2 offers four vias 21 corresponding respectively with four air vents 11, the edge of air discharging manifold flange 3 has multiple exhaust manifold bolt connecting hole 33 corresponding with sealing gasket bolt connecting hole 25, air discharging manifold flange 3 offers four gas ports corresponding respectively with four vias 21, sealing gasket 2 is between cylinder cap flange 1 and air discharging manifold flange 3, air vent 11, via 21, gas port correspondence connects, cylinder cap flange 1, sealing gasket 2, air discharging manifold flange 3 passes through through cylinder bolt connecting hole 14, sealing gasket bolt connecting hole 25, the cooperation of the bolts and nuts of exhaust manifold bolt connecting hole 33 and connect fixing。
If above-mentioned sealing structure is for general naturally aspirated engine, it is possible to reach the requirement sealed；But it is as the application of engine booster technology, in-cylinder direct-jet technology, exhaust manifold thermic load is more and more higher, delivery temperature brings up to more than 900 DEG C from 500 DEG C, if above-mentioned sealing structure is used for supercharged direct-injection engine, then can there are the following problems: (1) air discharging manifold flange easily produces moderate finite deformation, cracking under higher thermic load, causes sealing gasket seal failure；(2) can there is in X direction the heat wriggling of (i.e. the length direction of air discharging manifold flange, be equivalent to the left and right directions in Fig. 1) in air discharging manifold flange under the combined effect of mechanical stress and bigger thermal stress, causes bolt fracture；(3) air discharging manifold flange bigger heat in X direction is wriggled, and can make sealing gasket sliding, sealed muscle abrasion, cause seal failure。It can not meet the seal request of supercharged direct-injection engine。
Summary of the invention
It is an object of the invention to provide the sealing structure of a kind of supercharged direct-injection engine gas extraction system, to avoid bolt fracture, it is to avoid sealing gasket seal failure。
The sealing structure of supercharged direct-injection engine gas extraction system of the present invention, including cylinder cap flange, sealing gasket and air discharging manifold flange, cylinder cap flange offers multiple air vent (quantity of air vent is equal with the cylinder number of electromotor), sealing gasket offers the via corresponding with air vent, offering the gas port corresponding with via on air discharging manifold flange, the quantity of gas port is equal with the quantity of air vent；On described cylinder cap flange, the edge corresponding to air vent has sealed groove, the quantity of described sealing gasket is equal with the quantity of air vent, the shape of sealing gasket and the end surface shape of sealed groove match, on described air discharging manifold flange, the edge corresponding to gas port is provided with exhaustor, the height of exhaustor and the deep equality of sealed groove, the endoporus of exhaustor is corresponding with gas port；Described sealing gasket is contained in sealed groove, and exhaustor stretches in sealed groove, exhaustor compress sealing gasket and with sealed groove matched in clearance, air vent, via, endoporus, gas port correspondence connect, cylinder cap flange is connected by bolt and nut with air discharging manifold flange。
In order to facilitate sealing gasket to assemble, and preventing sealing gasket from coming off, the edge limited location groove of described sealed groove, the edge of described sealing gasket is provided with the clip for limiting matched with stopper slot, and when sealing gasket is contained in sealed groove, clip for limiting is connected in stopper slot。
In order to reduce cost while meeting seal request, described sealing gasket is made up of upper strata wavy metal substrate and lower metal ripple substrate, the outside of upper strata wavy metal substrate is welded with the outside of lower metal ripple substrate, the inner side of the inner side of upper strata wavy metal substrate and lower metal ripple substrate bends in opposite direction, forms the sealed muscle of cavity structure。
The present invention compared with prior art, has the effect that
(1) each air vent of cylinder cap flange has independent sealed groove, each sealing gasket is independently contained in sealed groove, each exhaustor on air discharging manifold flange stretch into the intrinsic pressure tight packing of sealed groove and with sealed groove matched in clearance, each cylinder air flue individually seals, which prevent air discharging manifold flange and produce bigger heat wriggling in X direction, avoid bolt fracture, it also avoid sealing gasket sliding, sealed muscle abrasion, do not have the situation that sealing gasket lost efficacy, seals structure gas leakage。
(2) each exhaustor on air discharging manifold flange is separate, each exhaustor protrudes from the end face of air discharging manifold flange, air discharging manifold flange is because of less by thermogenetic internal stress, avoid air discharging manifold flange under thermic load, produce moderate finite deformation, cracking, the temperature of the position installing bolt on air discharging manifold flange is lower than the temperature of exhaustor, it is to avoid bolt is because of the fracture failure by hot extrusion deformation。
(3) sealing gasket has clip for limiting, offers stopper slot in sealed groove, clip for limiting and stopper slot clamping, and sealing gasket is easy to assembly, and be not easy to come off, sliding。
(4) sealing gasket adopts double-decker, is made up of upper strata wavy metal substrate and lower metal ripple substrate, relative to three-decker, had both met seal request, and reduced again cost。
Accompanying drawing explanation
Fig. 1 is the sealed structural representation of existing engine exhaust system。
Fig. 2 is the structural representation of the present invention。
Fig. 3 is the structural representation of cylinder cap flange in the present invention。
Fig. 4 is the structural representation of sealing gasket in the present invention。
Fig. 5 is the A-A profile in Fig. 4。
Fig. 6 is the structural representation of air discharging manifold flange in the present invention。
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is elaborated。
The sealing structure of supercharged direct-injection engine gas extraction system as shown in Figures 2 to 6, including 1, four sealing gaskets 2 of cylinder cap flange and air discharging manifold flange 3。
As shown in Figure 2 and Figure 3, the edge of cylinder cap flange 1 has multiple cylinder bolt connecting hole 14, cylinder cap flange 1 offers four air vent 11(corresponding to four cylinder supercharged direct-injection engines), on cylinder cap flange 1, the edge corresponding to each air vent 11 is all machined with sealed groove 12(total of four sealed groove), the degree of depth a=5mm of sealed groove, the edge of sealed groove 12 has three stopper slots 13, and the line of three stopper slots 13 is mutually perpendicular to。
As shown in Fig. 2, Fig. 4, Fig. 5, the end surface shape of the shape of sealing gasket 2 and sealed groove 12 matches, and sealing gasket 2 offers the via 21 corresponding with air vent 11, and the edge of sealing gasket 2 is provided with three clip for limitings 22 matched with stopper slot 13；Sealing gasket 2 is made up of upper strata wavy metal substrate 23 and lower metal ripple substrate 24, the outside of upper strata wavy metal substrate 23 is welded with the outside of lower metal ripple substrate 24, the inner side of the inner side of upper strata wavy metal substrate 23 and lower metal ripple substrate 24 bends in opposite direction, forms the sealed muscle of cavity structure。
As shown in Fig. 2, Fig. 6, the edge of air discharging manifold flange 3 has multiple exhaust manifold bolt connecting hole 33 corresponding with cylinder bolt connecting hole 14, air discharging manifold flange 3 offers four gas ports 31, four gas ports 31 are corresponding with the via 21 of four sealing gaskets 2 respectively, on air discharging manifold flange 3, the edge corresponding to each gas port 31 is all welded with exhaustor 32(four exhaustors altogether), the height b=5mm of exhaustor 32, the endoporus 321 of exhaustor 32 and via 21, gas port 31 are corresponding。
When assembling, four sealing gaskets 2 are attached separately in four sealed grooves 12, three clip for limitings 22 of sealing gasket 2 are connected in three stopper slots 13 of the sealed groove 12 of correspondence respectively, four exhaustors 32 are respectively protruding in four sealed grooves 12, exhaustor 32 compress sealing gasket 2 and with sealed groove 12 matched in clearance, the corresponding connection of air vent 11, via 21, endoporus 321, gas port 31, cylinder cap flange 1 and air discharging manifold flange 3 are by being connected fixing through cylinder bolt connecting hole 14, the cooperation of the bolts and nuts of exhaust manifold bolt connecting hole 33。

Claims (3)

1. the sealing structure of a supercharged direct-injection engine gas extraction system, including cylinder cap flange (1), sealing gasket (2) and air discharging manifold flange (3), cylinder cap flange (1) offers multiple air vent (11), sealing gasket (2) offers the via (21) corresponding with air vent, offering the gas port (31) corresponding with via (21) on air discharging manifold flange (3), the quantity of gas port (31) is equal with the quantity of air vent (11)；It is characterized in that: on described cylinder cap flange (1), the edge corresponding to air vent (11) has sealed groove (12), the quantity of described sealing gasket (2) is equal with the quantity of air vent (11), the end surface shape of the shape of sealing gasket (2) and sealed groove (12) matches, described air discharging manifold flange (3) is provided with exhaustor (32) corresponding to the edge of gas port (31), the deep equality of the height of exhaustor (32) and sealed groove (12), the endoporus (321) of exhaustor (32) is corresponding with gas port (31)；Described sealing gasket (2) is contained in sealed groove (12), exhaustor (32) stretches in sealed groove (12), compress sealing gasket (2) and with sealed groove (12) matched in clearance, the corresponding connection of air vent (11), via (21), endoporus (321), gas port (31), cylinder cap flange (1) is connected by bolt and nut with air discharging manifold flange (3)。
2. the sealing structure of supercharged direct-injection engine gas extraction system according to claim 1, it is characterized in that: edge limited location groove (13) of described sealed groove (12), the edge of described sealing gasket (2) is provided with the clip for limiting (22) matched with stopper slot (13)。
3. the sealing structure of supercharged direct-injection engine gas extraction system according to claim 1 and 2, it is characterized in that: described sealing gasket (2) is made up of upper strata wavy metal substrate (23) and lower metal ripple substrate (24), the outside on upper strata wavy metal substrate (23) is welded with the outside of lower metal ripple substrate (24), the inner side of the inner side on upper strata wavy metal substrate (23) and lower metal ripple substrate (24) bends in opposite direction, forms the sealed muscle of cavity structure。
CN201610051350.XA 2016-01-26 2016-01-26 Sealing structure of turbo-charged direct injection engine exhaust system Pending CN105697118A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610051350.XA CN105697118A (en) 2016-01-26 2016-01-26 Sealing structure of turbo-charged direct injection engine exhaust system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610051350.XA CN105697118A (en) 2016-01-26 2016-01-26 Sealing structure of turbo-charged direct injection engine exhaust system

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CN105697118A true CN105697118A (en) 2016-06-22

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107100711A (en) * 2017-04-14 2017-08-29 重庆长安汽车股份有限公司 A kind of engine exhaust sealing structure and engine
CN107620624A (en) * 2017-10-25 2018-01-23 潍柴动力股份有限公司 A kind of sealing structure and engine of dual channel blast pipe and booster
WO2019080330A1 (en) * 2017-10-25 2019-05-02 潍柴动力股份有限公司 Sealing structure of dual-flow exhaust pipe and supercharger, and engine
CN110360020A (en) * 2019-08-22 2019-10-22 湖北玛尔帕斯动力科技有限公司 A kind of Cylinder of Natural Gas Engine lid and intake and exhaust seat ring integrated formed structure

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030070426A1 (en) * 2001-10-12 2003-04-17 Duffy Mark R. Air injection system for engine exhaust gases
CN1782337A (en) * 2004-11-25 2006-06-07 爱三工业株式会社 Exhaust pipe structure of automatic two wheel vehicle
JP3876248B2 (en) * 2003-11-26 2007-01-31 本田技研工業株式会社 Fuel injection valve seal structure
CN202349438U (en) * 2011-11-23 2012-07-25 芜湖杰锋汽车动力系统有限公司 Novel flange structure of automotive exhaust pipe
CN202707274U (en) * 2012-04-28 2013-01-30 奉化市科锐汽车部件有限公司 A sealer for an automobile exhaust pipe
CN202832842U (en) * 2012-09-11 2013-03-27 东风汽车公司 Exhaust manifold sealing gasket
CN103985632A (en) * 2014-05-13 2014-08-13 北京七星华创电子股份有限公司 Exhaust device of process pipe
CN203796458U (en) * 2014-02-17 2014-08-27 东风汽车公司 Air intake manifold for supercharging multi-point injection four-cylinder gasoline engine
CN104100403A (en) * 2014-07-14 2014-10-15 江苏启丰铸造有限公司 Diesel engine cylinder jacket
CN204704512U (en) * 2015-06-19 2015-10-14 安徽江淮汽车股份有限公司 A kind of automobile exhaust system and exhaust flange assembly thereof

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030070426A1 (en) * 2001-10-12 2003-04-17 Duffy Mark R. Air injection system for engine exhaust gases
JP3876248B2 (en) * 2003-11-26 2007-01-31 本田技研工業株式会社 Fuel injection valve seal structure
CN1782337A (en) * 2004-11-25 2006-06-07 爱三工业株式会社 Exhaust pipe structure of automatic two wheel vehicle
CN202349438U (en) * 2011-11-23 2012-07-25 芜湖杰锋汽车动力系统有限公司 Novel flange structure of automotive exhaust pipe
CN202707274U (en) * 2012-04-28 2013-01-30 奉化市科锐汽车部件有限公司 A sealer for an automobile exhaust pipe
CN202832842U (en) * 2012-09-11 2013-03-27 东风汽车公司 Exhaust manifold sealing gasket
CN203796458U (en) * 2014-02-17 2014-08-27 东风汽车公司 Air intake manifold for supercharging multi-point injection four-cylinder gasoline engine
CN103985632A (en) * 2014-05-13 2014-08-13 北京七星华创电子股份有限公司 Exhaust device of process pipe
CN104100403A (en) * 2014-07-14 2014-10-15 江苏启丰铸造有限公司 Diesel engine cylinder jacket
CN204704512U (en) * 2015-06-19 2015-10-14 安徽江淮汽车股份有限公司 A kind of automobile exhaust system and exhaust flange assembly thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107100711A (en) * 2017-04-14 2017-08-29 重庆长安汽车股份有限公司 A kind of engine exhaust sealing structure and engine
CN107620624A (en) * 2017-10-25 2018-01-23 潍柴动力股份有限公司 A kind of sealing structure and engine of dual channel blast pipe and booster
WO2019080330A1 (en) * 2017-10-25 2019-05-02 潍柴动力股份有限公司 Sealing structure of dual-flow exhaust pipe and supercharger, and engine
CN107620624B (en) * 2017-10-25 2020-08-21 潍柴动力股份有限公司 Sealing structure of double-flow-passage exhaust pipe and supercharger and engine
CN110360020A (en) * 2019-08-22 2019-10-22 湖北玛尔帕斯动力科技有限公司 A kind of Cylinder of Natural Gas Engine lid and intake and exhaust seat ring integrated formed structure

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