CN106065808A - A kind of compound tangential inlet duct strengthening engine charge eddy current - Google Patents

A kind of compound tangential inlet duct strengthening engine charge eddy current Download PDF

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Publication number
CN106065808A
CN106065808A CN201610633421.7A CN201610633421A CN106065808A CN 106065808 A CN106065808 A CN 106065808A CN 201610633421 A CN201610633421 A CN 201610633421A CN 106065808 A CN106065808 A CN 106065808A
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CN
China
Prior art keywords
main airway
storage chamber
air
air storage
eddy current
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Granted
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CN201610633421.7A
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Chinese (zh)
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CN106065808B (en
Inventor
卫海桥
裴自刚
潘明章
高东志
冯登全
赵万辉
陈曦
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Tianjin University
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Tianjin University
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Publication of CN106065808A publication Critical patent/CN106065808A/en
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Publication of CN106065808B publication Critical patent/CN106065808B/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B31/00Modifying induction systems for imparting a rotation to the charge in the cylinder
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B31/00Modifying induction systems for imparting a rotation to the charge in the cylinder
    • F02B31/08Modifying induction systems for imparting a rotation to the charge in the cylinder having multiple air inlets
    • F02B31/082Modifying induction systems for imparting a rotation to the charge in the cylinder having multiple air inlets the main passage having a helical shape around the intake valve axis; Engines characterised by provision of driven charging or scavenging pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D9/00Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/10006Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10026Plenum chambers
    • F02M35/10039Intake ducts situated partly within or on the plenum chamber housing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/10006Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10026Plenum chambers
    • F02M35/10052Plenum chambers special shapes or arrangements of plenum chambers; Constructional details
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/10091Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/10209Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10Air intakes; Induction systems
    • F02M35/104Intake manifolds
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D9/00Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • F02D2009/0201Arrangements; Control features; Details thereof
    • F02D2009/0244Choking air flow at low speed and load
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Exhaust Silencers (AREA)

Abstract

The invention discloses a kind of compound tangential inlet duct strengthening engine charge eddy current, including the air inlet being arranged on air storage chamber one end and the main airway connected with the air storage chamber other end, described air storage chamber is cylindrical cavity, described main airway is the cylindrical pipe connected with air storage chamber middle position, it is disposed with multiple gas-distributing channel round main airway, described gas-distributing channel is a bend pipe, one end of described bend pipe is through with the peripheral position of described air storage chamber, and the other end of described bend pipe and described main airway are the most through by tangentially connected mouth;Described main airway is provided with main airway air throttle with the connection position of described air storage chamber, and described main airway air throttle is controlled by a rotary switch.Under different load conditions, use various inlet scheme, the burning quality of electromotor when can improve underload, reduce oil consumption and discharge, can guarantee that again power output during high load capacity simultaneously.

Description

A kind of compound tangential inlet duct strengthening engine charge eddy current
Technical field
The present invention relates to field of internal combustion engine, particularly relate to internal combustion engine working process control, specifically one and relate to Engine charge status adjustment and the novel air inlet path design improving air mass.
Background technology
The operating mode of electromotor is divided into the operating modes such as startup, idling, Smaller load, middle load, full load, acceleration and deceleration.Spark ignition The formula electromotor amount of being adjustable type, i.e. carrys out the adaptation condition demand to output moment of torsion by change air inflow.In city, automobile Most of the time is to operate under Smaller load and moderate duty operating mode.The feature of small engine load operating mode is engine speed Low, throttle opening is little, induction air flow ratio is low, so the atomization mixing condition of injected fuel spray and oil film is poor, and engine cylinder Interior turbulence intensity is less, causes combustion mixture burning poor, and engine thermal efficiency is low and CO and HC discharge is the most serious.Cause This, if the combustion mixture turbulence intensity entering cylinder when Smaller load is big, mixing the most abundant, the burning of combustion mixture is then The most abundant, be more conducive to improving the thermal efficiency of electromotor.Electromotor uses tissue In Cylinder Flow to reach fuel and sky The well-mixed purpose of gas.
Gas handling system is the important component part of electromotor, is responsible for providing gasoline combustion acting necessary fresh to cylinder Air, in system, quality and the air flue design of air-flow are the most reasonable, have the biggest to electromotor performance and functional reliability etc. Impact.The structure of air intake duct directly affects the size of fresh air charge in cylinder and sucks the intensity of air-swirl, and air inlet Process enters the air capacity in cylinder and the VELOCITY DISTRIBUTION of gas and eddy current and turbulent flow conditions etc. significantly affect again combustion process, Thus it is directly connected to burning sophistication, the composition of aerofluxus, waste gas utilisable energy and the operating economy of electromotor of electromotor Property etc..The optimization of engine inlets flow behavior, can increase the strength of vortex in combustor, improve rate of flame propagation and Burn rate, shortens combustion duration, thus improves dynamic property and the economy of electromotor, can also realize sub-load simultaneously Lean-burn process under operating mode, improves the discharge performance of electromotor.Therefore to improve engine charge and fired state, it is necessary to The air flue of design new structure, promotes the power performance of electromotor, makes burning more efficiently.
Formed in intake process is referred to as intake swirl around the organized air motion of cylinder-bore axis, and intake swirl pair Significant in highly organized combustion process.The size of intake swirl is mainly by air intake duct shape and engine speed Determine.In the method producing intake swirl, the inlet valve of band inducing QI screen is wherein used to force air to flow before inducing QI screen Go out, rely on cylinder wall surface constraint, produce swirling eddy, improve the strength of vortex of charge air flow.And use tangential air flue produce into During gas eddy stream, tangential air flue shape matching is straight, strong contraction before valve seating, guides air-flow to enter cylinder with tangential direction, Thus cause the inhomogeneities of valve port VELOCITY DISTRIBUTION, be equivalent to, on the basis of even speed is distributed, increase by one tangentially The speed in air flue direction, adds the circumferential disturbance of air-flow, but owing to valve circulation area is not fully utilized, the most applicable In the electromotor requiring that intake vortex strength is the highest.And use the method for helical intake to be made by the valve intracavity above valve seating Spiral type, makes air-flow be formed for the rotation of some strength in spirality channel, and at valve port, the situation of air-flow is equivalent to On the basis of even speed is distributed, increases a tangential velocity, thus affect the flow regime of charge air flow, and then affect cylinder Interior gaseous mixture distribution.
Summary of the invention
The problem that present invention mainly solves is the generation of electromotor intake swirl under actual motion middle-low load and strong to it The enhancing of degree, by the structure that air intake duct is unique, four gas-distributing channels are tangentially connected on main airway, make to eventually enter into the sky of cylinder Gas has stronger eddy current, promotes the mixing of oil gas, improves gaseous mixture distribution, makes burning more abundant, improves efficiency of combustion, reduce Discharge.
In order to solve above-mentioned technical problem, a kind of the compound of engine charge eddy current that strengthen that the present invention proposes tangentially is entered Air flue, including the air inlet being arranged on air storage chamber one end and the main airway connected with the air storage chamber other end, described air storage chamber is circle Cylindrical cavity, described main airway is the cylindrical pipe connected with air storage chamber middle position, is disposed with multiple round main airway Gas-distributing channel, described gas-distributing channel is a bend pipe, and one end of described bend pipe is through with the peripheral position of described air storage chamber, described bend pipe The other end and described main airway are the most through by tangentially connected mouth;Described main airway is provided with the connection position of described air storage chamber Main airway air throttle, described main airway air throttle is controlled by a rotary switch.
In the present invention, the number of described gas-distributing channel is 3~5, and preferably 4, multiple gas-distributing channels are uniform at circumferencial direction. Described main airway air throttle is a circular slab that can rotate around rotary switch, and the external diameter of described circular slab is interior with described main airway Footpath coordinates.Described air inlet and the junction of described air storage chamber, described main airway and the junction of described air storage chamber, described point of gas Road is fillet design with the junction of described air storage chamber.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention design by Novel gas passage structure, takes different air inlets respectively when electromotor different load: low During load, air inlet mainly indirectly enters main airway from gas-distributing channel, to charge air flow Additional rotation angle momentum, increases intake swirl Intensity, promotes the good mixing of oil gas, improves burning quality, reduce fuel consumption, reduce discharge, promote simultaneously outside cylinder Flow rotation, it is to avoid the problem that in the design of original tangential air flue, valve flow area is not fully utilized;During moderate duty It is gradually increased the circulation area of main airway by controlling rotary switch, makes air inlet enter burning from main airway and gas-distributing channel simultaneously Room, can meet the needs that air inflow increases, can improve again intake vortex strength;During high load capacity, major part air is directly from main gas Road enters, and reduces intake resistance, it is ensured that air quantity delivered, it is ensured that the power output of electromotor.The reality of two kinds of various inlet schemes Execute, the burning quality of electromotor when can improve underload, reduce oil consumption and discharge, can guarantee that again power during high load capacity simultaneously Output.
Accompanying drawing explanation
Fig. 1 is a kind of compound tangential inlet duct structural representation strengthening intake swirl of the present invention;
Fig. 2 (a) is the position view of transverse cross sectional plane A in structure shown in Fig. 1;
Fig. 2 (b) is the sectional view of A slice location in Fig. 2 (a);
Fig. 3 (a) is longitudinally cutting plane B and the position view of longitudinally cutting plane C in structure shown in Fig. 1;
Fig. 3 (b) is the sectional view of B slice location in Fig. 3 (a);
Fig. 3 (c) is the sectional view of C slice location in Fig. 3 (a);
Fig. 4 (a) is the position view of transverse cross sectional plane D in structure shown in Fig. 1;
Fig. 4 (b) is the sectional view of D slice location in Fig. 4 (a).
In figure: 1-main airway, 2-gas-distributing channel, 3-rotary switch, 4-air storage chamber, 5-air inlet, 6-main airway air throttle, 7- Tangentially connected mouth.
Detailed description of the invention
Being described in further detail technical solution of the present invention with specific embodiment below in conjunction with the accompanying drawings, described is concrete The present invention is only explained by embodiment, not in order to limit the present invention.
As it is shown in figure 1, a kind of compound tangential inlet duct strengthening engine charge eddy current of the present invention, including being arranged on storage The air inlet 5 of air chamber 4 one end and the main airway 1 connected with air storage chamber 4 other end, main airway 1 can use electromotor conventional Common admission line.
Described air storage chamber 4 is cylindrical cavity, and described main airway 1 is the cylindrical tube connected with air storage chamber 4 middle position Road, is disposed with multiple gas-distributing channel 2 round main airway 1, and the number of described gas-distributing channel 2 is 3~5, and Fig. 2 (a) and Fig. 2 (b) shows The number having gone out described gas-distributing channel 2 is 4, and multiple gas-distributing channels 2 are uniform at circumferencial direction.
Described gas-distributing channel 2 is a bend pipe, and one end of described bend pipe is through with the peripheral position of described air storage chamber 4, described curved The other end of pipe is the most through by tangentially connected mouth 7 with described main airway 1, as shown in Fig. 3 (b), Fig. 4 (a) and Fig. 4 (b), by Connection between gas-distributing channel 2 and main airway 1 is tangentially connected, thus, the air being entered main airway 1 by gas-distributing channel 2 is had Tangential rotary speed, i.e. air can produce rotary motion after gas-distributing channel 2 enters main airway 1, thus form swirling eddy.
Described air inlet 5 and the junction of described air storage chamber 4, described main airway 1 and the junction of described air storage chamber 4, institute The junction stating gas-distributing channel 2 and described air storage chamber 4 is fillet design, to reduce the resistance increasing caused due to flow area sudden change Big and gas shock.
(i.e. the position of close air storage chamber 4 in main airway 1, such as Fig. 2 for described main airway 1 and the connection position of described air storage chamber 4 Shown in (a)) it is provided with main airway air throttle 6, described main airway air throttle 6 is controlled by a rotary switch 3.Such as Fig. 3 (a), Fig. 3 (b) With Fig. 3 (c) Suo Shi, described main airway air throttle 6 is a circular slab that can rotate around rotary switch 3, the external diameter of described circular slab Minor diameter fit with described main airway 1.It is internal that main airway air throttle 6 is fixedly mounted on main airway 1, can be turned by rotary switch 3 Dynamic main airway air throttle 6 rotates along rotary switch 3 place axis such that it is able to opens or closes main airway 1 and leads to air storage chamber 6 Section of tubing, and its aperture can be controlled flexibly.As shown in Fig. 2 (b), closing main airway air throttle 6 when, air will The main main airway 1 that indirectly enters from four gas-distributing channels 2, and then enter cylinder, and opening main airway air throttle 6 when, greatly Partial air will be directed into main airway 1.
There is the present invention and be combined tangential inlet duct electromotor, during underload, by rotary switch 3 by main airway air throttle 6 Close, utilize four gas-distributing channels 2 that by tangentially connected mouth 7, fresh air is sent into main airway 1, so that entering the air-flow of cylinder There is rotary speed, the additional rotational momentum along air intake duct axis, form swirling eddy, thus improve strength of vortex, and gas The generation that stream rotates it also avoid valve flow area in the design of original tangential air flue outside cylinder and is not fully utilized Problem;It is gradually increased the circulation area of main airway 1 during moderate duty by controlling rotary switch 3, makes air inlet simultaneously from main gas Road 1 and gas-distributing channel 2 enter combustor, can meet the needs that air inflow increases, can improve again intake vortex strength;High load capacity Time, the air of needs is more, and intake resistance is relatively big, relies only on gas-distributing channel 2 air inlet and can cause bigger intake resistance, reduces inflation Efficiency, utilizes rotary switch 3 to fully open main airway air throttle 6, improves actual internal area, it is ensured that the supply of air capacity.
Although above in conjunction with accompanying drawing, invention has been described, but the invention is not limited in above-mentioned being embodied as Mode, above-mentioned detailed description of the invention is only schematic rather than restrictive, and those of ordinary skill in the art is at this Under the enlightenment of invention, without deviating from the spirit of the invention, it is also possible to make many variations, these belong to the present invention's Within protection.

Claims (5)

1. can strengthen a compound tangential inlet duct for engine charge eddy current, including the air inlet being arranged on air storage chamber (4) one end Mouth (5) and the main airway (1) connected with air storage chamber (4) other end, it is characterised in that:
Described air storage chamber (4) is cylindrical cavity, and described main airway (1) is the cylinder connected with air storage chamber (4) middle position Pipeline, is disposed with multiple gas-distributing channel (2) round main airway (1), and described gas-distributing channel (2) is a bend pipe, one end of described bend pipe Through with the peripheral position of described air storage chamber (4), the other end of described bend pipe and described main airway (1) are by tangentially connected mouth (7) the most through;
Described main airway (1) is provided with main airway air throttle (6), described main airway solar term with the connection position of described air storage chamber (4) Door (6) is controlled by a rotary switch (3).
The compound tangential inlet duct of engine charge eddy current can be strengthened the most according to claim 1, it is characterised in that: described point The number of air flue (2) is 3~5, and multiple gas-distributing channels (2) are uniform at circumferencial direction.
The compound tangential inlet duct of engine charge eddy current can be strengthened the most according to claim 2, it is characterised in that: described point The number of air flue (2) is 4.
4., according to the arbitrary described compound tangential inlet duct that can strengthen engine charge eddy current of claims 1 to 3, its feature exists In: described main airway air throttle (6) is a circular slab that can rotate around rotary switch (3), and the external diameter of described circular slab is with described The minor diameter fit of main airway (1).
5., according to the arbitrary described compound tangential inlet duct that can strengthen engine charge eddy current of claims 1 to 3, its feature exists In: described air inlet (5) and the junction of described air storage chamber (4), the junction of described main airway (1) and described air storage chamber (4), Described gas-distributing channel (2) is fillet design with the junction of described air storage chamber (4).
CN201610633421.7A 2016-08-03 2016-08-03 A kind of compound tangential inlet duct enhancing engine charge vortex Active CN106065808B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106704057A (en) * 2017-01-20 2017-05-24 李桂江 Parallel automobile engine air intake system
CN108590899A (en) * 2018-06-19 2018-09-28 天津大学 A kind of shunting guide type air inlet path for diesel engine
CN114184560A (en) * 2021-11-09 2022-03-15 天津大学 Spectral measurement device based on gas rapid mixing

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5435283A (en) * 1994-01-07 1995-07-25 Cummins Engine Company, Inc. Swirl control system for varying in-cylinder swirl
CN2390016Y (en) * 1999-09-24 2000-08-02 张敬国 Intake device of flat suction single carburetter for 750 motorcycle
CN2617937Y (en) * 2003-05-28 2004-05-26 刘德新 Engine cylinder head of motorcycle with assistant exhaust
CN101666262A (en) * 2008-09-04 2010-03-10 上海通用汽车有限公司 Controllable swirl air passage
CN201810431U (en) * 2010-09-20 2011-04-27 广西玉柴机器股份有限公司 Diesel engine intake duct
CN103362700A (en) * 2013-07-30 2013-10-23 长城汽车股份有限公司 Air filter and car with same
CN205876480U (en) * 2016-08-03 2017-01-11 天津大学 Can strengthen engine intake swirl's compound tangential gas inlet way

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5435283A (en) * 1994-01-07 1995-07-25 Cummins Engine Company, Inc. Swirl control system for varying in-cylinder swirl
CN2390016Y (en) * 1999-09-24 2000-08-02 张敬国 Intake device of flat suction single carburetter for 750 motorcycle
CN2617937Y (en) * 2003-05-28 2004-05-26 刘德新 Engine cylinder head of motorcycle with assistant exhaust
CN101666262A (en) * 2008-09-04 2010-03-10 上海通用汽车有限公司 Controllable swirl air passage
CN201810431U (en) * 2010-09-20 2011-04-27 广西玉柴机器股份有限公司 Diesel engine intake duct
CN103362700A (en) * 2013-07-30 2013-10-23 长城汽车股份有限公司 Air filter and car with same
CN205876480U (en) * 2016-08-03 2017-01-11 天津大学 Can strengthen engine intake swirl's compound tangential gas inlet way

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106704057A (en) * 2017-01-20 2017-05-24 李桂江 Parallel automobile engine air intake system
CN108590899A (en) * 2018-06-19 2018-09-28 天津大学 A kind of shunting guide type air inlet path for diesel engine
CN108590899B (en) * 2018-06-19 2023-12-26 天津大学 Air inlet channel of split-flow guide type diesel engine
CN114184560A (en) * 2021-11-09 2022-03-15 天津大学 Spectral measurement device based on gas rapid mixing

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