CN103397959A - Air inlet connecting pipe of EGR engine - Google Patents

Air inlet connecting pipe of EGR engine Download PDF

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Publication number
CN103397959A
CN103397959A CN2013102735845A CN201310273584A CN103397959A CN 103397959 A CN103397959 A CN 103397959A CN 2013102735845 A CN2013102735845 A CN 2013102735845A CN 201310273584 A CN201310273584 A CN 201310273584A CN 103397959 A CN103397959 A CN 103397959A
Authority
CN
China
Prior art keywords
air inlet
fresh air
waste gas
tube
described
Prior art date
Application number
CN2013102735845A
Other languages
Chinese (zh)
Inventor
李兴章
徐国龙
李明星
Original Assignee
广西玉柴机器股份有限公司
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 广西玉柴机器股份有限公司 filed Critical 广西玉柴机器股份有限公司
Priority to CN2013102735845A priority Critical patent/CN103397959A/en
Publication of CN103397959A publication Critical patent/CN103397959A/en

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Classifications

    • 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
    • Y02T10/12Technologies for the improvement of indicated efficiency of a conventional ICE
    • Y02T10/121Adding non fuel substances or small quantities of secondary fuel to fuel, air or fuel/air mixture

Abstract

The invention discloses an air inlet connecting pipe of an EGR engine. The air inlet connecting pipe comprises a fresh air inlet single pipe and an exhaust gas mixing tube. The two ends of the fresh air inlet single pipe are provided with a sharing air inlet and a sharing air outlet respectively. The sharing air inlet is connected with a device used for providing fresh air, the sharing air outlet is connected with an air inlet pipe, and an electronic throttle valve which is in control connection with an engine ECU is connected between the sharing air inlet and the sharing air outlet in series. The exhaust gas mixing tube uses the sharing air inlet together with the fresh air inlet single pipe, and an air outlet of the exhaust gas mixing tube is connected into the fresh air inlet single pipe on the upstream portion of the sharing air outlet. A Venturi tube is additionally arranged in the exhaust gas mixing tube, an exhaust gas channel hole which is led to the inside of the Venturi tube is formed in the throat portion of the equal diameter of the Venturi tube, and an exhaust gas air inlet is formed in the side wall of the exhaust gas mixing tube corresponding to the exhaust gas channel hole. According to the air inlet connecting pipe of the EGR engine, a double-channel air inlet mode is adopted, the mixing uniformity of exhaust gas and the fresh air is improved, and nitric oxide in the exhaust gas can be effectively lowered.

Description

The EGR engine charge is taken over

Technical field

The present invention relates to engine art, particularly a kind of EGR engine charge is taken over.

Background technique

The purpose that engine charge is taken over is for connecting engine suction tude and the device (as: intercooler) that fresh air is provided, and when motor band EGR device, air inlet tube also plays the effect that the waste gas that will introduce from outlet pipe mixes with fresh air.EGR refers to that exhaust gas recirculatioon (Exhaust Gas Recirculation) isolates the part of Exhaust Gas import the air inlet side and make its technology of burning once again (gimmick or method) with compact internal combustion engine for automobile after burning.Main purpose can improve the rate of fuel consumption rate for the nitrogen oxide (NOx) that reduces in Exhaust Gas when sharing sub load.

Existing EGR engine charge is taken over most the employing and on the body of air inlet tube, is increased an inlet hole that connects waste gas, to directly guide to air inlet tube from the waste gas that engine exhaust pipe is introduced, then in air inlet tube, directly carry out mixed once, the most mixed waste gas provides to suction tude, to realize mixing of fresh air and waste gas.

The shortcoming that EGR engine charge adapter prior art mainly exists is that the Combination of waste gas and fresh air is poor, when while pressure reduction between low exhaust velocity and air inlet is little, can not control the ratio of fresh air and waste gas, the dynamic control (can only provide single EGR to lead) that the EGR of motor leads namely can't be provided, the reduction weak effect of the nitrogen oxide in Exhaust Gas (NOx), while sharing sub load, rate of fuel consumption rate raising property is poor.

Summary of the invention

The present invention is in order to overcome defect in above-mentioned prior art, provides a kind of rational in infrastructure, and the Combination of waste gas and fresh air is good; Can control the ratio of fresh air and waste gas, when with the EGR that realizes motor, leading dynamically the nitrogen oxide (NOx) of controlling, effectively reducing in Exhaust Gas and sharing sub load, improve the EGR engine charge of rate of fuel consumption rate and take over.

For achieving the above object, according to the invention provides a kind of EGR engine charge, take over, comprising:

The FAI Fresh Air Intake single tube, two ends have respectively common suction port and common air outlet, common suction port is connected with the device that fresh air is provided, and common air outlet is connected with suction tude, between common suction port and common air outlet, is serially connected with the electronic throttle with the Engine ECU control connection;

The waste gas mixing tube, itself and FAI Fresh Air Intake single tube share described common suction port, and its air outlet is at the described FAI Fresh Air Intake single tube of upstream, common air outlet access; In the waste gas mixing tube, add Venturi tube, the equal diameter aditus laryngis place of Venturi tube offers the exhaust steam passage hole towards Venturi tube inside, on the waste gas mixing tube sidewall corresponding with the exhaust steam passage hole, offers waste gas inlet.

In technique scheme, on the FAI Fresh Air Intake single tube, the side that is positioned at electronic throttle is arranged with sebific duct.

In technique scheme, Venturi tube comprises: equal diameter entrance, contraction section, equal diameter aditus laryngis and diffuser.

In technique scheme, the exhaust steam passage hole is circumferentially offered along described Venturi tube equal diameter aditus laryngis place.

In technique scheme, the exhaust steam passage hole along described Venturi tube equal diameter aditus laryngis place circumferentially side by side multi-turn offer.

In technique scheme, the waste gas inlet place is provided with mounting flange.

In technique scheme, the air outlet of waste gas mixing tube stretches to 1/3 position of FAI Fresh Air Intake single tube caliber.

Compared with prior art, the present invention has following beneficial effect: this EGR engine charge is taken over and is adopted the Twin channel intake method, first via series connection electronic throttle wherein, control the FAI Fresh Air Intake amount, the second path built-in Venturi tube, after waste gas passes through Venturi tube aditus laryngis place and fresh air mixes, then mix with the fresh air secondary of the first via, improve waste gas and fresh air mixing uniformity; Adopt dynamically control engine suction tude air inflow of electronic throttle and Twin channel mode thereof, thereby by the pressure reduction that changes new charge and waste gas, changing EGR leads, can control the ratio of fresh air and waste gas, when with the EGR that realizes motor, leading dynamically the nitrogen oxide (NOx) of controlling, effectively reducing in Exhaust Gas and sharing sub load, improve the rate of fuel consumption rate.

The accompanying drawing explanation

Fig. 1 is the structural representation that EGR engine charge of the present invention is taken over;

Fig. 2 is the sectional structure schematic diagram that EGR engine charge of the present invention is taken over;

The accompanying drawing explanation:

The common suction port of 11-, 12-FAI Fresh Air Intake single tube, 13-waste gas mixing tube, the common air outlet of 14-, 15-electronic throttle, 16-sebific duct, 17-Venturi tube, 18-exhaust steam passage hole, 19-waste gas inlet.

Embodiment

Below in conjunction with accompanying drawing, a specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention is not subjected to the restriction of embodiment.It will be appreciated that, mentioned in following mode of execution of the present invention " on ", D score, " left side ", " right side ", " front " and " reverse side " be all take the direction shown in each figure as benchmark, these words that are used for limiting direction are only for convenience of explanation, do not represent the restriction to the concrete technological scheme of the present invention.

EGR engine charge of the present invention is taken over and is adopted the Twin channel intake method, first via series connection electronic throttle wherein, control the FAI Fresh Air Intake amount, the second path built-in Venturi tube, after waste gas passes through Venturi tube aditus laryngis place and fresh air mixes, with the fresh air secondary of the first via, mix again, improve waste gas and fresh air mixing uniformity; Adopt dynamically control engine suction tude air inflow of electronic throttle and Twin channel mode thereof, thereby by the pressure reduction that changes new charge and waste gas, changing EGR leads, can control the ratio of fresh air and waste gas, when with the EGR that realizes motor, leading dynamically the nitrogen oxide (NOx) of controlling, effectively reducing in Exhaust Gas and sharing sub load, improve the rate of fuel consumption rate.

Below detailed description by way of example but unrestriced mode has illustrated the disclosure, should be understood that various aspect of the present disclosure can be by independent realization or the realization of being combined with other aspects.This specification clearly enables those skilled in the art to manufacture and uses us to believe for new and non-obvious improvement, describe some embodiments, alternative, modification, alternative and system applies, comprised the current best mode that is considered to carry out the inventive principle of describing in this specification.When describing element or feature and/or embodiment, titled with " one " " one " " being somebody's turn to do " and " described ", be intended to represent to have one or more in element or feature.Term " comprises " that " comprising " and " having " is intended to is comprising property, and also has extra element or feature beyond being illustrated in those specifically described elements or feature.

(arrow represents the fresh air flow direction) as depicted in figs. 1 and 2, this EGR engine charge is taken over the mode of structure that the air inlet path is divided into to two-way (Twin channel) on the basis of traditional single structure and is realized air inlet, its concrete structure comprises: FAI Fresh Air Intake single tube 12 and waste gas mixing tube 13 with common suction port 11, common suction port 11 is connected with the device that fresh air is provided (as: intercooler), and fresh air is divided into two-way via common suction port 11 and enters respectively FAI Fresh Air Intake single tube 12 and waste gas mixing tube 13.12 logical ozones of FAI Fresh Air Intake single tube, the mode of employing series connection electronic throttle is controlled the air inflow of fresh air on gas-entered passageway.Electronic throttle is controlled aperture by Engine ECU, and the aperture of electronic throttle will be carried out suitable adjustment according to required air inflow when motor is in high speed.To adjust air input of engine by air, simultaneously owing to controlling overall air inflow, and the amount of waste gas can lead by control engine EGR under constant condition, thereby reduces the discharging of motor NOx.The built-in Venturi tube of waste gas mixing tube 13, and in Venturi tube aditus laryngis place, offer the appropriate exhaust steam passage hole that leads to Venturi tube inside, the air outlet of waste gas mixing tube 13 is stretched into FAI Fresh Air Intake single tube 12 and with it, is converged the common air outlet 14 of formation; After waste gas passes through Venturi tube aditus laryngis place and fresh air mixes, then mix with the fresh air secondary in FAI Fresh Air Intake single tube 12, the most mixed waste gas provides to suction tude, improves waste gas and fresh air mixing uniformity.

As shown in Figure 2, the two ends, left and right of FAI Fresh Air Intake single tube 12 have respectively common suction port 11 and common air outlet 14, common suction port 11 is connected with the device that fresh air is provided, common air outlet 14 is connected with suction tude, and fresh air enters engine air inlet tube by the common air outlet 14 of FAI Fresh Air Intake single tube 12.The middle part of FAI Fresh Air Intake single tube 12 is serially connected with the electronic throttle 15 with the Engine ECU control connection, and the right side that is positioned at electronic throttle 15 on FAI Fresh Air Intake single tube 12 is arranged with sebific duct 16; FAI Fresh Air Intake single tube 12 adopts the mode of series connection electronic throttle to control the air inflow of fresh air.Electronic throttle is controlled aperture by Engine ECU, and the aperture of electronic throttle will be carried out suitable adjustment according to required air inflow when motor is in high speed.To adjust air input of engine by air, simultaneously owing to controlling overall air inflow, and the amount of waste gas is under constant condition, thereby by the pressure reduction that changes new charge and waste gas, changing EGR leads, thereby reduces the discharging of motor NOx.

in waste gas mixing tube 13, add Venturi tube 17, Venturi tube 17 comprises: the equal diameter entrance, contraction section, equal diameter aditus laryngis and diffuser, equal diameter aditus laryngis place circumferentially offers the exhaust steam passage hole 18 that leads to Venturi tube inside of multi-turn, waste gas inlet 19 is opened on waste gas mixing tube 13 sidewalls corresponding with exhaust steam passage hole 18, the waste gas of getting from outlet pipe is incorporated into waste gas mixing tube 13 via waste gas inlet 19, by the exhaust steam passage hole 18 that is evenly arranged on Venturi tube 17, entering into the Venturi tube inner passage realizes mixing for the first time with its inner fresh air.The principle of Venturi effect is when obstacle is crossed in wind, and air pressure is relatively low near port above the lee face of obstacle, thereby produces suction-operated and cause flowing of air.When waste gas streams on Venturi tube 17 the time, flow velocity will form at Venturi tube equal diameter aditus laryngis place local contraction, thereby the flow velocity increase, and static pressure reduces, to form absorption waste gas, enter the fresh air inner with it mixed uniformly " negative pressure ", improved the uniformity of mixing; In addition, waste gas enters into the Venturi tube inner passage and mixes with its inner fresh air by being evenly arranged in exhaust steam passage hole 18 on Venturi tube 17, has improved equally the uniformity of the two mixing.

1/3 position of the end air outlet of waste gas mixing tube 13 about its caliber in FAI Fresh Air Intake single tube 12 bodys are stretched in 14 upstreams, common air outlet, realize through the preliminary mixed gas that mixes, with the fresh air in FAI Fresh Air Intake single tube 12, mixing for the second time in waste gas mixing tube 13, waste gas can better be mixed with fresh air.Simultaneously, the end air outlet of waste gas mixing tube 13 is stretched in FAI Fresh Air Intake single tube 12 bodys approximately 1/3 position of its caliber and also can be improved the uniformity that waste gas mixes with fresh air.

As shown in Figure 2, fresh air enters respectively FAI Fresh Air Intake single tube 12 and waste gas mixing tube 13 by common suction port 11, the fresh air that enters waste gas mixing tube 13 mixes with the waste gas that enters into the Venturi tube inner passage by being evenly arranged in exhaust steam passage hole 18 on Venturi tube 17 for the first time at 17 equal diameter aditus laryngis place on Venturi tube, and then mix for the second time with the fresh air in FAI Fresh Air Intake single tube 12, FAI Fresh Air Intake single tube 12 adopts the mode of series connection electronic throttle to control the air inflow of fresh air.Electronic throttle is controlled aperture by Engine ECU, and the aperture of electronic throttle will be carried out suitable adjustment according to required air inflow when motor is in high speed.To adjust air input of engine by air, simultaneously owing to controlling overall air inflow, and the amount of waste gas is under constant condition, thereby by the pressure reduction that changes new charge and waste gas, changing EGR leads, thereby reduces the discharging of motor NOx.Three kinds of modes such as 1/3 position that Venturi tube place waste gas mixes for the first time with air, about its caliber in FAI Fresh Air Intake single tube 12 bodys is stretched in the end air outlet of mixing, waste gas mixing tube 13 have for the second time improved fresh air and waste gas mixing uniformity, reduce the discharging of motor NOx, better realize the effect of EGR.This EGR engine charge is taken over and is adopted Split type structure, and each part is processed simple and easy, as to be convenient to install, reduced part processing cost.

To sum up, this EGR engine charge is taken over and is adopted the Twin channel intake method, first via series connection electronic throttle wherein, control the FAI Fresh Air Intake amount, the second path built-in Venturi tube, after waste gas passes through Venturi tube aditus laryngis place and fresh air mixes, then mix with the fresh air secondary of the first via, improve waste gas and fresh air mixing uniformity; Adopt dynamically control engine suction tude air inflow of electronic throttle and Twin channel mode thereof, thereby by the pressure reduction that changes new charge and waste gas, changing EGR leads, can control the ratio of fresh air and waste gas, when with the EGR that realizes motor, leading dynamically the nitrogen oxide (NOx) of controlling, effectively reducing in Exhaust Gas and sharing sub load, improve the rate of fuel consumption rate.

Above disclosed be only several specific embodiment of the present invention, still, the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.

Claims (7)

1. an EGR engine charge is taken over, and it adopts the Twin channel intake method, it is characterized in that, comprising:
The FAI Fresh Air Intake single tube, two ends have respectively common suction port and common air outlet, described common suction port is connected with the device that fresh air is provided, common air outlet is connected with suction tude, between described common suction port and common air outlet, is serially connected with the electronic throttle with the Engine ECU control connection;
The waste gas mixing tube, itself and described FAI Fresh Air Intake single tube share described common suction port, and its air outlet is at the described FAI Fresh Air Intake single tube of upstream, described common air outlet access; In the waste gas mixing tube, add Venturi tube, the equal diameter aditus laryngis place of described Venturi tube offers the exhaust steam passage hole towards Venturi tube inside, on the waste gas mixing tube sidewall corresponding with the exhaust steam passage hole, offers waste gas inlet.
2. EGR engine charge according to claim 1 is taken over, and it is characterized in that: on described FAI Fresh Air Intake single tube, the side that is positioned at electronic throttle is arranged with sebific duct.
3. EGR engine charge according to claim 1 is taken over, and it is characterized in that: described Venturi tube comprises: equal diameter entrance, contraction section, equal diameter aditus laryngis and diffuser.
4. EGR engine charge according to claim 1 is taken over, and it is characterized in that: described exhaust steam passage hole is circumferentially offered along described Venturi tube equal diameter aditus laryngis place.
5. EGR engine charge according to claim 4 is taken over, and it is characterized in that: described exhaust steam passage hole along described Venturi tube equal diameter aditus laryngis place circumferentially side by side multi-turn offer.
6. EGR engine charge according to claim 1 is taken over, and it is characterized in that: described waste gas inlet place is provided with mounting flange.
7. according to claim 1 to 6, the described EGR engine charge of any one is taken over, and it is characterized in that: the air outlet of described waste gas mixing tube stretches to 1/3 position of FAI Fresh Air Intake single tube caliber.
CN2013102735845A 2013-07-02 2013-07-02 Air inlet connecting pipe of EGR engine CN103397959A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103742302A (en) * 2013-12-31 2014-04-23 广西玉柴机器股份有限公司 Egr mixer
CN103953478A (en) * 2014-04-15 2014-07-30 广东嘉纳仕科技实业有限公司 Novel two-channel pressurized air charging pipe
CN104047780A (en) * 2014-06-25 2014-09-17 中国第一汽车股份有限公司无锡油泵油嘴研究所 High supercharged engine intake port and designing method
CN105351116A (en) * 2015-11-30 2016-02-24 康跃科技股份有限公司 Circulating air intake system
CN106567765A (en) * 2015-10-13 2017-04-19 福特环球技术公司 Method and system for particulate filter leakage detection
US10316803B2 (en) 2017-09-25 2019-06-11 Woodward, Inc. Passive pumping for recirculating exhaust gas

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CN201714522U (en) * 2010-07-08 2011-01-19 温州大学 Multistage parallel-connection type Venturi pipe air inlet system for diesel engine
CN102052204A (en) * 2009-11-02 2011-05-11 万国引擎知识产权有限责任公司 Three-way throttle valve
CN201891532U (en) * 2010-09-20 2011-07-06 广西玉柴机器股份有限公司 EGR (exhaust gas recirculation) air inlet control system of light diesel engine
CN202125382U (en) * 2011-05-25 2012-01-25 广西玉柴机器股份有限公司 Gas inlet tube of diesel engine
CN202900451U (en) * 2012-10-19 2013-04-24 东风汽车有限公司 Exhaust gas recirculation (EGR) mixer for EGR engine
JP2013087720A (en) * 2011-10-20 2013-05-13 Isuzu Motors Ltd Venturi for egr
CN203335295U (en) * 2013-07-02 2013-12-11 广西玉柴机器股份有限公司 EGR engine air inlet connecting tube

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101158317A (en) * 2007-11-07 2008-04-09 奇瑞汽车有限公司 High-speed diesel electronic control transverse currents continuousvariable mechanical installation
CN102052204A (en) * 2009-11-02 2011-05-11 万国引擎知识产权有限责任公司 Three-way throttle valve
CN201714522U (en) * 2010-07-08 2011-01-19 温州大学 Multistage parallel-connection type Venturi pipe air inlet system for diesel engine
CN201891532U (en) * 2010-09-20 2011-07-06 广西玉柴机器股份有限公司 EGR (exhaust gas recirculation) air inlet control system of light diesel engine
CN202125382U (en) * 2011-05-25 2012-01-25 广西玉柴机器股份有限公司 Gas inlet tube of diesel engine
JP2013087720A (en) * 2011-10-20 2013-05-13 Isuzu Motors Ltd Venturi for egr
CN202900451U (en) * 2012-10-19 2013-04-24 东风汽车有限公司 Exhaust gas recirculation (EGR) mixer for EGR engine
CN203335295U (en) * 2013-07-02 2013-12-11 广西玉柴机器股份有限公司 EGR engine air inlet connecting tube

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103742302A (en) * 2013-12-31 2014-04-23 广西玉柴机器股份有限公司 Egr mixer
CN103953478A (en) * 2014-04-15 2014-07-30 广东嘉纳仕科技实业有限公司 Novel two-channel pressurized air charging pipe
CN103953478B (en) * 2014-04-15 2016-08-17 广东嘉纳仕科技实业有限公司 Dual pathways super charge pipe
CN104047780A (en) * 2014-06-25 2014-09-17 中国第一汽车股份有限公司无锡油泵油嘴研究所 High supercharged engine intake port and designing method
CN106567765A (en) * 2015-10-13 2017-04-19 福特环球技术公司 Method and system for particulate filter leakage detection
CN105351116A (en) * 2015-11-30 2016-02-24 康跃科技股份有限公司 Circulating air intake system
CN105351116B (en) * 2015-11-30 2019-09-10 康跃科技股份有限公司 A kind of circulation gas handling system
US10316803B2 (en) 2017-09-25 2019-06-11 Woodward, Inc. Passive pumping for recirculating exhaust gas
US10634099B2 (en) 2017-09-25 2020-04-28 Woodward, Inc. Passive pumping for recirculating exhaust gas

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Application publication date: 20131120