CN105134421A - EGR (exhaust gas recirculation) system of engine - Google Patents
EGR (exhaust gas recirculation) system of engine Download PDFInfo
- Publication number
- CN105134421A CN105134421A CN201510672426.6A CN201510672426A CN105134421A CN 105134421 A CN105134421 A CN 105134421A CN 201510672426 A CN201510672426 A CN 201510672426A CN 105134421 A CN105134421 A CN 105134421A
- Authority
- CN
- China
- Prior art keywords
- egr
- motor
- valve
- diaphragm spring
- engine
- 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
Links
Classifications
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The invention discloses an EGR (exhaust gas recirculation) system of an engine, which comprises an EGR valve and an engine gas inlet connecting pipe, wherein a first end of the EGR valve is provided with a gas inlet; the gas inlet is provided with a seal valve plate; a second end is provided with a diaphragm spring; the middle part of the EGR valve is provided with a gas outlet; a push rod is sandwiched between the diaphragm spring and the seal valve plate; the diaphragm spring, push rod and seal valve plate form a mobile assembly; the gas inlet is communicated with an exhaust pipe of the engine; the gas outlet is communicated with the engine gas inlet connecting pipe; the gas inlet connecting pipe is communicated with a gas inlet pipe of the engine; and at least one vent pipe is arranged between the gas inlet connecting pipe and the second end. The EGR system is flexible and simple in control due to the positive pressure control, and satisfies the new discharge standard. Besides, the EGR system does not need any EGR cooler, sensor, controller, vacuum pump (negative pressure control) or other parts, and the exhaust gas does not need to be recirculated after being cooled. Thus, the EGR system has the advantages of simple structure and low cost.
Description
Technical field
The present invention relates to engine art, particularly a kind of egr system of motor.
Background technique
On October 1st, 2015 plays country and comes into effect non-rice habitats state 3 emission standard, and it is stricter than the emission request of Che Ji state 3 to the limit value of NOx.In order to make emission compliance, except adopting electric control fuel system, also need to increase gas recirculation system (EGR), NOx is reduced further, just the emission standard of non-rice habitats state 3 can be reached.
There are two kinds of modes realizing EGR (EGR) at present:
The first is Internal EGR, and by amendment cam profile and port timing, the moment of opening controlling inlet and exhaust valve realizes fraction waste gas and enters cylinder mixed combustion.But this scheme can have waste gas to enter in cylinder under motor different rotating speeds burns, and affects the responsiveness of the middle low speed of motor, and increases cycle ratio oil consumption, can emit white cigarette during engine low-temperature starting-up, and this scheme is less to be applied on the engine.
The second way is external EGR, EGR valve, sensor and final controlling element are set, collect by sensor the aperture that signal controls motor EGR valve under different rotating speeds and operating mode and realize different EGR rate, by cooler for recycled exhaust gas cooling is carried out to waste gas and and air inlet be mixed into cylinder combustion and burn.The conventional control mode of opening of EGR valve has electronic and by vacuum pump vacuum cavitations two kinds.Need to increase corresponding sensor, cooler for recycled exhaust gas, controller (Electronic control), vacuum pump (vacuum cavitations) etc., the scheme of such egr system is complicated, and number of spare parts is many and cost is high.
The information being disclosed in this background technique part is only intended to increase the understanding to general background of the present invention, and should not be regarded as admitting or imply in any form that this information structure has been prior art that persons skilled in the art are known.
Summary of the invention
The object of the present invention is to provide a kind of egr system of motor, thus overcome existing egr system responsiveness and oil consumption difference and cold-starting time emit white cigarette, or the many and defect that cost is high of number of spare parts.
For achieving the above object, the invention provides a kind of egr system of motor, egr system comprises: EGR valve, the first end of EGR valve is provided with suction port, suction port place is provided with sealing valve plate, and the second end is provided with diaphragm spring, and the middle part of EGR valve is provided with air outlet, sandwiched push rod between diaphragm spring and sealing valve plate, diaphragm spring, push rod and sealing valve plate form moving assembly; Suction port is communicated with waste pipe, makes sealing valve plate one end of moving assembly form exhaust pressure; The air inlet tube of motor, air outlet is communicated with the air inlet tube of motor, and air inlet tube is communicated with the suction tude of motor, the outlet of the suction tude of motor and the pressurized machine of motor; Be provided with at least one breathing pipe between air inlet tube and the second end, make diaphragm spring one end of moving assembly form suction pressure.
Preferably, in technique scheme, second end is provided with the first breathing pipe, air inlet tube is provided with the second breathing pipe, thermostat valve is provided with between the other end of the first breathing pipe and the other end of the second breathing pipe, thermostat valve is arranged on the water jacket of motor, and thermostat valve is controlled by the temperature of the cooling water of motor.
Preferably, in technique scheme, thermostat valve is wax formula thermostat valve.
Compared with prior art, the present invention has following beneficial effect:
The suction pressure of egr system of the present invention is determined by the air pressure of pressurized machine and the temperature of cooling water, within the engine low cruise and cooling water temperature low time stop EGR valve open, stop EGR, make the responsiveness of motor and oil consumption all more excellent, avoid emitting white cigarette during cold-starting; When high speed operation and cooling water temperature are greater than exhaust pressure higher than critical value, suction pressure within the engine, EGR valve is just opened, and realizes EGR, utilizes over-pressure control, control simple flexibly, meet new emission standard.In addition, the present invention is without the need to parts such as cooler for recycled exhaust gas, sensor, controller and vacuum pumps (vacuum cavitations), and waste gas is without the need to cooling rear recirculation, and structure is simple, and cost is low.
Accompanying drawing explanation
Fig. 1 is the structural drawing according to EGR valve of the present invention.
Fig. 2 is the structural drawing according to egr system of the present invention.
Fig. 3 is the plan view of Fig. 2.
Main Reference Numerals illustrates:
1-diaphragm spring, 2-push rod, 3-air outlet, 4-suction port, 5-first breathing pipe, 6-second breathing pipe, 7-thermostat valve, 8-suction tude, 9-air inlet tube, 10-EGR valve suction tude, 11-outlet pipe, 12-pressurized machine, 13-EGR valve, 14-seals valve plate.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention not by the restriction of embodiment.
Clearly represent unless otherwise other, otherwise in whole specification and claims, term " comprise " or its conversion as " comprising " or " including " etc. by be understood to include the element of stating or constituent element, and do not get rid of other element or other constituent element.
As shown in Figure 2 to Figure 3, EGR valve 13,9 air inlet tubes of motor, the first breathing pipe 5 and the second breathing pipe 6 is comprised according to the egr system of the motor of the specific embodiment of the invention.
As shown in Figure 1, the first end of EGR valve 13 is provided with suction port 4, suction port 4 place is provided with sealing valve plate 14, second end is provided with diaphragm spring 1, and the middle part of EGR valve 13 is provided with air outlet 3, sandwiched push rod 2 between diaphragm spring 1 and sealing valve plate 14, diaphragm spring 1, push rod 2 and sealing valve plate 14 form moving assembly.
As shown in Figures 2 and 3, suction port 4 is communicated with by EGR valve suction tude 10 with waste pipe 11, and the gas in outlet pipe 11 enters in suction port 4, makes sealing valve plate one end of moving assembly form exhaust pressure.Air outlet 3 is communicated with the air inlet tube 9 of motor, and air inlet tube 9 is communicated with suction tude 8, the outlet of the pressurized machine 12 of suction tude 8 and motor.
Second end of EGR valve 13 is provided with the first breathing pipe 5, and the diameter that air inlet tube 9 is provided with the second breathing pipe 6, first breathing pipe 5 and the second breathing pipe 6 is less than the diameter of air outlet 3.Thermostat valve 7 is provided with between the other end of the first breathing pipe 5 and the other end of the second breathing pipe 6, thermostat valve 7 is arranged on the water jacket of motor, be connected with the cooling water of motor, therefore thermostat valve 7 is controlled by the temperature of the cooling water of motor, such structure makes the gas in suction tude enter the second end of EGR valve 13, makes diaphragm spring one end of moving assembly form suction pressure.
Preferably, thermostat valve 7 is wax formula thermostat valve.
When cooling water is in low temperature (lower than 80 DEG C), thermostat valve 7 is closed condition, namely the first breathing pipe 5 is not communicated with the second breathing pipe 6, suction pressure above the diaphragm spring 1 of now EGR valve is zero, be less than the exhaust pressure below sealing valve plate 14, EGR valve 13 is not opened, and does not have EGR.When the temperature of cooling water is higher than 80 DEG C, thermostat valve 7 is opened, and namely the first breathing pipe 5 is communicated with the second breathing pipe 6, and when suction pressure is greater than exhaust pressure, EGR valve 13 is opened, and realizes EGR.
In motor during low cruise, the charge-air pressure that pressurized machine 12 provides is little, now, the suction pressure above diaphragm spring 1 is less than the exhaust pressure below sealing valve plate 14, and sealing valve plate 14 is maintained in suction port 4, EGR valve 13 cannot be opened, waste gas cannot enter EGR valve, cannot realize EGR, and the now burning of motor is all ozone, the responsiveness of motor and oil consumption are all more excellent, avoid emitting white cigarette during cold-starting.
When engine high speed is run, when the temperature of cooling water is higher than 80 DEG C, thermostat valve 7 is opened, first breathing pipe 5 is communicated with the second breathing pipe 6, the charge-air pressure that pressurized machine 12 provides is larger, air after supercharging is laggard in air inlet tube 9 through intercooler, and by the second breathing pipe 6, thermostat valve 7 and the first breathing pipe 5 are delivered to the top of the diaphragm spring 1 of EGR valve 13, when the suction pressure above diaphragm spring 1 is greater than the exhaust pressure below sealing valve plate 14, diaphragm spring 1 promotes sealing valve plate 14 by push rod 2 and moves down, waste gas in outlet pipe 11 enters EGR valve 13 from suction port 4, waste gas enters in air inlet tube 9 through air outlet 3, and enter cylinder by the suction tude 8 of motor after mixing with fresh air and burn, realize EGR (EGR).
The suction pressure of egr system of the present invention is determined by the air pressure of pressurized machine and the temperature of cooling water, within the engine low cruise and cooling water temperature low time stop EGR valve open, stop EGR, make the responsiveness of motor and oil consumption all more excellent, avoid emitting white cigarette during cold-starting; When high speed operation and cooling water temperature are greater than exhaust pressure higher than critical value, suction pressure within the engine, EGR valve is just opened, and realizes EGR, utilizes over-pressure control, control simple flexibly, meet new emission standard.In addition, the present invention is without the need to parts such as cooler for recycled exhaust gas, sensor, controller and vacuum pumps (vacuum cavitations), and waste gas is without the need to cooling rear recirculation, and structure is simple, and cost is low.
The aforementioned description to concrete exemplary of the present invention is to illustrate and the object of illustration.These descriptions not want the present invention to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.The object selected exemplary embodiment and describe is to explain certain principles of the present invention and practical application thereof, thus those skilled in the art can be realized and utilize various different exemplary of the present invention and various different selection and change.Scope of the present invention is intended to limited by claims and equivalents thereof.
Claims (3)
1. an egr system for motor, is characterized in that, described egr system comprises:
EGR valve, the first end of described EGR valve is provided with suction port, described suction port place is provided with sealing valve plate, second end is provided with diaphragm spring, and the middle part of described EGR valve is provided with air outlet, sandwiched push rod between described diaphragm spring and described sealing valve plate, described diaphragm spring, described push rod and described sealing valve plate form moving assembly; Described suction port is communicated with described waste pipe, makes sealing valve plate one end of described moving assembly form exhaust pressure;
The air inlet tube of motor, described air outlet is communicated with the air inlet tube of described motor, and described air inlet tube is communicated with the suction tude of described motor, the outlet of the suction tude of described motor and the pressurized machine of motor; Be provided with at least one breathing pipe between described air inlet tube and described second end, make diaphragm spring one end of described moving assembly form suction pressure.
2. the egr system of motor according to claim 1, it is characterized in that, described second end is provided with the first breathing pipe, described air inlet tube is provided with the second breathing pipe, thermostat valve is provided with between the other end of described first breathing pipe and the other end of described second breathing pipe, described thermostat valve is arranged on the water jacket of motor, and described thermostat valve is controlled by the temperature of the cooling water of described motor.
3. the egr system of motor according to claim 2, is characterized in that, described thermostat valve is wax formula thermostat valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510672426.6A CN105134421A (en) | 2015-10-15 | 2015-10-15 | EGR (exhaust gas recirculation) system of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510672426.6A CN105134421A (en) | 2015-10-15 | 2015-10-15 | EGR (exhaust gas recirculation) system of engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105134421A true CN105134421A (en) | 2015-12-09 |
Family
ID=54719938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510672426.6A Pending CN105134421A (en) | 2015-10-15 | 2015-10-15 | EGR (exhaust gas recirculation) system of engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105134421A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105569885A (en) * | 2016-03-01 | 2016-05-11 | 广西玉柴机器股份有限公司 | Exhaust gas recirculation (EGR) system |
| CN105697199A (en) * | 2016-04-11 | 2016-06-22 | 广西玉柴机器股份有限公司 | Temperature control EGR system of engine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5937253A (en) * | 1982-08-24 | 1984-02-29 | Nissan Motor Co Ltd | Exhaust-gas recirculating apparatus for internal combustion engine |
| CN1912369A (en) * | 2005-08-09 | 2007-02-14 | 雅马哈发动机株式会社 | Waste gas of locomotive recovery system |
| CN101832200A (en) * | 2010-03-19 | 2010-09-15 | 天津内燃机研究所 | Waste gas recirculating device and recirculating method for miniature gasoline engine |
| CN102094732A (en) * | 2011-03-10 | 2011-06-15 | 东风朝阳柴油机有限责任公司 | Assembly arranging structure of electric control exhaust gas recirculating system |
| CN102959225A (en) * | 2011-03-24 | 2013-03-06 | 丰田自动车株式会社 | Exhaust gas circulation device for internal combustion engine |
| CN204267178U (en) * | 2014-11-21 | 2015-04-15 | 无锡隆盛科技股份有限公司 | Non-rice habitats motor EGR valve |
| CN205025642U (en) * | 2015-10-15 | 2016-02-10 | 广西玉柴机器股份有限公司 | EGR system of engine |
-
2015
- 2015-10-15 CN CN201510672426.6A patent/CN105134421A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5937253A (en) * | 1982-08-24 | 1984-02-29 | Nissan Motor Co Ltd | Exhaust-gas recirculating apparatus for internal combustion engine |
| CN1912369A (en) * | 2005-08-09 | 2007-02-14 | 雅马哈发动机株式会社 | Waste gas of locomotive recovery system |
| CN101832200A (en) * | 2010-03-19 | 2010-09-15 | 天津内燃机研究所 | Waste gas recirculating device and recirculating method for miniature gasoline engine |
| CN102094732A (en) * | 2011-03-10 | 2011-06-15 | 东风朝阳柴油机有限责任公司 | Assembly arranging structure of electric control exhaust gas recirculating system |
| CN102959225A (en) * | 2011-03-24 | 2013-03-06 | 丰田自动车株式会社 | Exhaust gas circulation device for internal combustion engine |
| CN204267178U (en) * | 2014-11-21 | 2015-04-15 | 无锡隆盛科技股份有限公司 | Non-rice habitats motor EGR valve |
| CN205025642U (en) * | 2015-10-15 | 2016-02-10 | 广西玉柴机器股份有限公司 | EGR system of engine |
Non-Patent Citations (1)
| Title |
|---|
| W•哈赛伯: "《汽车发动机调试方法》", 31 August 1987, 机械工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105569885A (en) * | 2016-03-01 | 2016-05-11 | 广西玉柴机器股份有限公司 | Exhaust gas recirculation (EGR) system |
| CN105697199A (en) * | 2016-04-11 | 2016-06-22 | 广西玉柴机器股份有限公司 | Temperature control EGR system of engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104454194B (en) | The control device of compression ignition engine | |
| CN105443274B (en) | Multistage cooling cooling system for recycled exhaust gas | |
| US20160108827A1 (en) | Control apparatus of engine | |
| US20180266365A1 (en) | Exhaust gas control apparatus of internal combustion engine | |
| CN105525983A (en) | Engine system | |
| CN105840355A (en) | All-working-condition EGR rate adjustable two-stage booster system of internal combustion engine and control method thereof | |
| CN102312731B (en) | Diesel engine for vehicle | |
| CN104018961B (en) | The air inlet pipeline system of a kind of engine with supercharger and air inlet bypass valve | |
| CN106337728A (en) | Device and control strategy improving engine dynamic performance | |
| CN105134421A (en) | EGR (exhaust gas recirculation) system of engine | |
| CN103291442B (en) | Air incoming system of two-stage supercharged engine | |
| CN105422323A (en) | Leading-in device capable of realizing controllable cold and hot EGR (exhaust gas recirculation) | |
| CN105370390A (en) | Supercharged inter-cooling internal combustion engine gas intake bypass control device | |
| CN205025642U (en) | EGR system of engine | |
| US10018108B2 (en) | Methods for engine air-path reversion management | |
| CN211549859U (en) | Range-extended vehicle EGR cooling system and vehicle | |
| CN205172763U (en) | EGR (exhaust gas recirculation) system | |
| CN205225496U (en) | Realize cold, controllable introducing device of hot EGR | |
| CN204312212U (en) | For the emission control systems of non-rice habitats state three diesel engine | |
| CN208650994U (en) | Combination type firewood oil turbine heat management system | |
| CN207437239U (en) | A kind of variable cooling EGR gas handling systems | |
| CN204572264U (en) | Bypass type cooler for recycled exhaust gas | |
| CN102943706B (en) | A kind of intercooler for diesel engine | |
| CN105402023A (en) | Intake control system | |
| JP2012237231A (en) | Blowby gas reflux device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151209 |
|
| WD01 | Invention patent application deemed withdrawn after publication |