CN202900451U - Exhaust gas recirculation (EGR) mixer for EGR engine - Google Patents

Exhaust gas recirculation (EGR) mixer for EGR engine Download PDF

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Publication number
CN202900451U
CN202900451U CN2012205372384U CN201220537238U CN202900451U CN 202900451 U CN202900451 U CN 202900451U CN 2012205372384 U CN2012205372384 U CN 2012205372384U CN 201220537238 U CN201220537238 U CN 201220537238U CN 202900451 U CN202900451 U CN 202900451U
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CN
China
Prior art keywords
egr
mixer
gas inlet
gas
cavity
Prior art date
Application number
CN2012205372384U
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Chinese (zh)
Inventor
邓磊
许法亮
杨细元
唐天清
胡国强
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东风汽车有限公司
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Application filed by 东风汽车有限公司 filed Critical 东风汽车有限公司
Priority to CN2012205372384U priority Critical patent/CN202900451U/en
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Publication of CN202900451U publication Critical patent/CN202900451U/en

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    • Y02T10/121

Abstract

Provided is an exhaust gas recirculation (EGR) mixer for an EGR engine. An exhaust gas inlet channel (3) faces a mixer inner cavity (1) which is provided with a throat opening (5) inside, the throat opening (5) is a tubular necking opening which is thin in the middle and thick at two ends, and exhaust gas inlet holes (4) are evenly formed in the pipe walls of the necking opening in an inclined arrangement mode along the gas inlet direction. The EGR mixer for the EGR engine is compact in structure, outside gas inlet kinetic energy of the EGR engine plays a certain role in drainage to EGR exhaust gas, meanwhile vortexes are formed, and are beneficial for fully mix between the exhaust gas and entered fresh air from outside, due to the fact that the diameter of the throat opening is reduced herein, the venturi effect is enabled to be generated, gas velocity is increased, static pressure is lowered, differential pressure between gas inlet and gas exhaust is increased, flow velocity is quickened, the problem that EGR efficiency is low because of the differential pressure between the gas inlet and the gas exhaust is low when the EGR engine is in slow-speed rotation is solved, performance of the EGR engine is improved, oil consumption is reduced, and service life of a complete machine is prolonged.

Description

A kind of EGR motor EGR mixer

Technical field

The utility model relates to a kind of suction tude, relates in particular to a kind of EGR motor EGR mixer.

Background technique

At present for satisfying country to the requirement of motor state IV, state's V and state's VI discharging, need to adopt new technology, new technology and reasonably discharge course reduce the discharging of motor.Consider that for cost and regional convenience aspect EGR becomes the effective means that motor reaches emission request, the EGR technology is EGR Technology.On the EGR motor, part waste gas need to be introduced in the air inlet, air inlet is diluted, thereby reduce the in-cylinder combustion detonation pressure, reduce the generation of nitrogen oxide in tail gas.Under the operating modes such as low speed high load, the exhaust back pressure of motor is less, and EGR leads and often is difficult to reach re-set target.Because the air inlet in the suction tude and the exhaust gas temperature of introducing, flow velocity, pressure is different, so that being uniformly mixed into of air inlet and EGR waste gas is a great problem.The mixing of EGR waste gas and air inlet is inhomogeneous, can worsen engine cylinder internal combustion situation, causes the performance of motor to reduce, and fuel consumption rate and discharging also can raise, and worsen EGR waste gas to the corrosion of each parts in the cylinder.

Such as Chinese utility model patent notification number: CN102182586A, open day: the utility model patent on September 14th, 2011 disclosed a kind of EGR mixer, comprise the first cavity and the second cavity, the first cavity comprises the first suction port and air outlet, the second cavity comprises the second suction port, the second cavity is communicated with the first inside cavity by a plurality of vents that have on the first cavity body wall, fresh air and EGR waste gas enter through the first suction port, the second suction port respectively, both flow directions are vertical, and can evenly mix in the first cavity.But this device is not easy to machine shaping, and it is larger to take up room, and gas is not easy to form eddy current in mixing chamber, causes easily the mixing of helical duct core inhomogeneous, so that the power performance of motor does not reach the optimum state.

Summary of the invention

The purpose of this utility model is abundant not with mixing of extraneous natural air for the waste gas of existing EGR motor, cause the out of condition defective of engine cylinder internal combustion and deficiency, provide a kind of simple in structure, the waste gas of EGR motor is abundant with mixing of extraneous natural air, a kind of EGR motor EGR mixer that the engine cylinder internal combustion is all right.

For achieving the above object, technical solution of the present utility model is: a kind of EGR motor EGR mixer, comprise the mixer shell, the inside of mixer shell is mixer cavity, one end of mixer cavity is the engine charge side, the other end of mixer cavity is mixed gas outlet, one side of mixer shell is provided with the gas inlet passage, the mixer cavity inside that described gas inlet passage faces is provided with aditus laryngis, aditus laryngis is middle thin, the thick tubular reducing in two ends, is provided with the gas inlet hole of inclination on the tube wall of reducing along airintake direction.

The axis of described gas inlet passage and the axis of mixer cavity are perpendicular.

The angle that the axis in described gas inlet hole and the shaft axis of mixer cavity are is 30 degree-60 degree.

The minimum diameter of described aditus laryngis is 3/5-5/6 with the ratio of the internal diameter of mixer shell.

The beneficial effects of the utility model are:

1. the utility model is provided with the gas inlet passage in a side of mixer shell, the mixer cavity that the gas inlet passage faces is set to aditus laryngis, evenly offer the gas inlet hole on the circumference of aditus laryngis, the axis in gas inlet hole has deflection on both direction, deflection air inlet flow direction is so that air inlet has drainage to it, deflection inner circle tangent direction can form eddy current, so that the kinetic energy of the extraneous air inlet of motor has certain drainage to EGR waste gas, form simultaneously eddy current, be conducive to waste gas and the fresh air that enters in the engine air inlet tube from the external world fully mixes.

2. the utility model compact structure, because the diameter of aditus laryngis diminishes herein, and Venturi effect can occur, airspeed increases, static pressure descends, so that the degree of vacuum in the mixer cavity increases, air inlet and exhaust pressure reduction increase, and have accelerated flowing velocity, be conducive to the abundant mixing of gas, overcome motor and when the slow-speed of revolution, led problem on the low side owing to the too small EGR that causes of intake and exhaust pressure reduction, improved the performance of EGR motor and reduced oil consumption, prolonged machine life.

Description of drawings

Fig. 1 is structural representation of the present utility model.

Among the figure: mixer cavity 1, mixer shell 2, gas inlet passage 3, gas inlet hole 4, aditus laryngis 5, engine charge side 6, mixed gas outlet 7.

Embodiment

Below in conjunction with description of drawings and embodiment the utility model is described in further detail.

Referring to Fig. 1, a kind of EGR motor EGR mixer of the present utility model, comprise mixer shell 2, the inside of mixer shell 2 is mixer cavity 1, one end of mixer cavity 1 is engine charge side 6, the other end of mixer cavity 1 is mixed gas outlet 7, one side of mixer shell 2 is provided with gas inlet passage 3, mixer cavity 1 inside that described gas inlet passage 3 faces is provided with aditus laryngis 5, aditus laryngis 5 is middle thin, the thick tubular reducing in two ends, is provided with the gas inlet hole 4 of inclination on the tube wall of reducing along airintake direction.

The axis of the axis of described gas inlet passage 3 and mixer cavity 1 is perpendicular.

The angle that the axis in described gas inlet hole 4 and the shaft axis of mixer cavity 1 are is 30 degree-60 degree.

The minimum diameter of described aditus laryngis 5 is 3/5-5/6 with the ratio of the internal diameter of mixer shell 2.

The inside of mixer shell 2 is mixer cavity 1, and an end of mixer cavity 1 is engine charge side 6, and the other end of mixer cavity 1 is mixed gas outlet 7.Side at mixer shell 2 is provided with gas inlet passage 3, and the mixer cavity 1 that gas inlet passage 3 faces is set to aditus laryngis 5, and aditus laryngis 5 is middle thin, the thick tubular reducing in two ends.Be provided with the gas inlet hole 4 of inclination on the tube wall of reducing along airintake direction, the angle that the shaft axis of the axis in gas inlet hole 4 and mixer cavity 1 is is 30 degree-60 degree.A part of waste gas that motor is discharged is entered in the mixer cavity 1 by gas inlet hole 4 by gas inlet passage 3, because the axis in gas inlet hole 4 and the shaft axis of mixer cavity 1 are at an angle, the airintake direction of the axis deflection engine charge side 6 in gas inlet hole 4, and the inner circle tangent direction of the axis in gas inlet hole 4 deflection mixer cavity 1.The deflection airintake direction in gas inlet hole 4 can make the kinetic energy of the extraneous air inlet of motor that EGR waste gas is had certain drainage like this, simultaneously can also be so that waste gas can be in mixer cavity 1 rotation disturbance when entering mixer cavity 1 from gas inlet hole 4, form eddy current, be conducive to waste gas and fully mix with the extraneous fresh air that enters.

Extraneous air enters into mixer cavity 1 from engine charge side 6, through aditus laryngis 5 time, because the diameter of aditus laryngis 5 diminishes herein, and Venturi effect can occur, airspeed increases, static pressure descends, so that the degree of vacuum in the mixer cavity 1 increases, air inlet and exhaust pressure reduction increase, and this has just promoted EGR waste gas to flow in mixer cavity 1 by gas inlet passage 3, accelerate flowing velocity, be conducive to more uniform mixing.Overcome motor when the slow-speed of revolution because the too small EGR that causes of intake and exhaust pressure reduction leads problem on the low side.Improve the performance of EGR motor and reduced oil consumption, prolonged machine life.

Claims (4)

1. EGR motor EGR mixer, comprise mixer shell (2), the inside of mixer shell (2) is mixer cavity (1), one end of mixer cavity (1) is engine charge side (6), the other end of mixer cavity (1) is mixed gas outlet (7), one side of mixer shell (2) is provided with gas inlet passage (3), it is characterized in that: mixer cavity (1) inside that described gas inlet passage (3) faces is provided with aditus laryngis (5), aditus laryngis (5) is middle thin, the tubular reducing that two ends are thick is provided with the gas inlet hole (4) of inclination along airintake direction on the tube wall of reducing.
2. a kind of EGR motor EGR mixer according to claim 1, it is characterized in that: the axis of the axis of described gas inlet passage (3) and mixer cavity (1) is perpendicular.
3. a kind of EGR motor EGR mixer according to claim 1 is characterized in that: the angle that the shaft axis of the axis in described gas inlet hole (4) and mixer cavity (1) is is 30 degree-60 degree.
4. a kind of EGR motor EGR mixer according to claim 1, it is characterized in that: the ratio of the internal diameter of the minimum diameter of described aditus laryngis (5) and mixer shell (2) is 3/5-5/6.
CN2012205372384U 2012-10-19 2012-10-19 Exhaust gas recirculation (EGR) mixer for EGR engine CN202900451U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012205372384U CN202900451U (en) 2012-10-19 2012-10-19 Exhaust gas recirculation (EGR) mixer for EGR engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012205372384U CN202900451U (en) 2012-10-19 2012-10-19 Exhaust gas recirculation (EGR) mixer for EGR engine

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Publication Number Publication Date
CN202900451U true CN202900451U (en) 2013-04-24

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103397959A (en) * 2013-07-02 2013-11-20 广西玉柴机器股份有限公司 Air inlet connecting pipe of EGR engine
CN103742302A (en) * 2013-12-31 2014-04-23 广西玉柴机器股份有限公司 Egr mixer
CN104110331A (en) * 2014-07-09 2014-10-22 昆明云内动力股份有限公司 EGR exhaust gas evenly-mixing device of engine
CN104234876A (en) * 2013-06-17 2014-12-24 卡特彼勒公司 System and method for exhaust gas re-circulation
CN104265513A (en) * 2014-09-22 2015-01-07 广西玉柴机器股份有限公司 Natural gas engine egr mixing device
CN105114160A (en) * 2015-07-29 2015-12-02 安徽江淮汽车股份有限公司 Catalytic conversion device and waste gas and air mixer thereof
CN105298689A (en) * 2014-06-30 2016-02-03 福特环球技术公司 Method and system used for generating vortex at engine inlet
CN105626321A (en) * 2016-03-22 2016-06-01 奇瑞汽车股份有限公司 EGR mixer of gasoline engine
CN106224132A (en) * 2016-08-29 2016-12-14 潍柴动力股份有限公司 A kind of EGR mixing arrangement
CN106640268A (en) * 2016-11-09 2017-05-10 昆山三动力有限公司 Ventilation device for engine crankcase and engine

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104234876A (en) * 2013-06-17 2014-12-24 卡特彼勒公司 System and method for exhaust gas re-circulation
CN103397959A (en) * 2013-07-02 2013-11-20 广西玉柴机器股份有限公司 Air inlet connecting pipe of EGR engine
WO2015101030A1 (en) * 2013-12-31 2015-07-09 广西玉柴机器股份有限公司 Egr mixer
CN103742302A (en) * 2013-12-31 2014-04-23 广西玉柴机器股份有限公司 Egr mixer
CN105298689A (en) * 2014-06-30 2016-02-03 福特环球技术公司 Method and system used for generating vortex at engine inlet
CN105298689B (en) * 2014-06-30 2019-06-14 福特环球技术公司 For generating the method and system being vortexed in engine intake
CN104110331A (en) * 2014-07-09 2014-10-22 昆明云内动力股份有限公司 EGR exhaust gas evenly-mixing device of engine
CN104110331B (en) * 2014-07-09 2016-10-05 昆明云内动力股份有限公司 A kind of EGR exhaust uniform mixing device of electromotor
CN104265513A (en) * 2014-09-22 2015-01-07 广西玉柴机器股份有限公司 Natural gas engine egr mixing device
CN104265513B (en) * 2014-09-22 2016-08-17 广西玉柴机器股份有限公司 Natural gas engine EGR mixing arrangement
CN105114160A (en) * 2015-07-29 2015-12-02 安徽江淮汽车股份有限公司 Catalytic conversion device and waste gas and air mixer thereof
CN105114160B (en) * 2015-07-29 2017-11-17 安徽江淮汽车集团股份有限公司 Catalytic convention design and its waste gas air blender
CN105626321A (en) * 2016-03-22 2016-06-01 奇瑞汽车股份有限公司 EGR mixer of gasoline engine
CN106224132A (en) * 2016-08-29 2016-12-14 潍柴动力股份有限公司 A kind of EGR mixing arrangement
CN106224132B (en) * 2016-08-29 2018-12-14 潍柴动力股份有限公司 A kind of EGR mixing arrangement
CN106640268A (en) * 2016-11-09 2017-05-10 昆山三动力有限公司 Ventilation device for engine crankcase and engine

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GR01 Patent grant
C14 Grant of patent or utility model
TR01 Transfer of patent right

Effective date of registration: 20130906

Address after: 442001 Shiyan City, Hubei province city Zhangwan District Road No. 2

Patentee after: Dongfeng Commercial Vehicle Co., Ltd.

Address before: 430056 Dongfeng Road, Wuhan Economic Development Zone, Hanyang District, Hubei, China, No. 10, No.

Patentee before: Dongfeng Automobile Co., Ltd.

ASS Succession or assignment of patent right

Owner name: DONGFENG COMMERCIAL VEHICLE CO., LTD.

Free format text: FORMER OWNER: DONGFENG AUTOMOBILE CO., LTD.

Effective date: 20130906

C41 Transfer of patent application or patent right or utility model
COR Change of bibliographic data

Free format text: CORRECT: ADDRESS; FROM: 430056 WUHAN, HUBEI PROVINCE TO: 442001 SHIYAN, HUBEI PROVINCE