CN102156048B - Device for detecting engine exhaust back pressure as well as particle catch regeneration control system and method - Google Patents
Device for detecting engine exhaust back pressure as well as particle catch regeneration control system and method Download PDFInfo
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- CN102156048B CN102156048B CN201110099881A CN201110099881A CN102156048B CN 102156048 B CN102156048 B CN 102156048B CN 201110099881 A CN201110099881 A CN 201110099881A CN 201110099881 A CN201110099881 A CN 201110099881A CN 102156048 B CN102156048 B CN 102156048B
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- 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
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Abstract
The invention discloses a device for detecting engine exhaust back pressure. An opening at one side of a sleeve-shaped shell is provided with an air inlet, and an annular lug boss is arranged on the inner wall of the shell, where the air inlet is positioned; a top cover with an axial through hole is hermetically fixed on the opening at the other side of the shell; the upper end of a mandril penetrates through the axial through hole, the lower end of the mandril is provided with a bottom tray which supports against the annular lug boss or separates from the annular lug boss; an elastic member is arranged between the bottom tray and the top cover; and an air vent is arranged on the outer wall of the shell, and the axial size between the air vent and the bottom tray is more than the thickness of the bottom tray. Furthermore, the invention also provides a particle catch regeneration control system and method for a diesel engine by utilizing the device. The mandril is stretched under the action of the exhaust back pressure to ensure that a control circuit board outputs a particle catch regeneration control signal or alarm signal, therefore, the time of particle catch initiative regeneration of the diesel engine is effectively controlled, and the service life of the engine and a DPF (Diesel Particulate Filter) member is prolonged.
Description
Technical field
The present invention relates to diesel engine emissions control field, is specifically related to a kind of engine exhaust back pressure pick-up unit and uses diesel motor micro particle catching generation control system, the method for this device.
Background technology
Diesel motor is the main type of goods stock power source, because it has good dynamic property and economy, in recent years, also begins to be applied to large and medium-sized car gradually.
As everyone knows, the principal element of restriction diesel motor development is the problem of discharging.The main emission of diesel motor is a particulate; Normally petrolic more than 30 times; Because the particulate of diesel engine emissions is very big to the harm of human body, so the emissions of diesel engines problem caused the common concern of countries in the world governments, and formulated strict emission control standards one after another.In order to satisfy the requirement of the diesel engine emissions standard that countries in the world government formulates; People have generally adopted in the machine or the technological particulate emission that reduces diesel motor of external purification; Wherein the emission controls by improving combustion technology mainly contains the optimization fuel injection system, improves fuel qualities and many Valves Technology etc., and the external purification technology mainly contains oxidation catalyzer, electrostatic separation technique, plasma for purification technology and the micro particle catching technology etc. of installing additional.
Along with the requirement to diesel engine emissions is more and more stricter, only depend on the emission controls by improving combustion technology can not satisfy higher emission standard requirement, must take the external purification technology simultaneously.At present, be to satisfy in the technology that state's IV emission standard adopted in China, a kind of technology that is referred to as exhaust gas recirculation (EGR) more and more receives people's favor.This technology is utilized the particle trapper (DPF) that is arranged on the exhaust pipe of engine to filter overproof particulate simultaneously, thereby is reduced the discharging of harmful gas oxides of nitrogen through participating in burning in the draft tube that waste gas is imported engine.But when the particulate that captures among the DPF was more and more, the exhaust back pressure of engine also can increase, and the exhaust back pressure rising can cause oil consumption increase, power to descend, and can influence the life-span of some parts of engine when serious.Therefore the control device of particle trapper (DPF) initiative regeneration must be set in the EGR Technology; The exhaust back pressure that monitors according to differential pressure pickup sprays into diesel oil and burns in gas outlet, the carbon particulate of collecting among the DPF is changed into carbon dioxide discharge.
Yet find but that in practical application because differential pressure pickup can only be monitored pressure reduction, be not sure of the time of particle trapper (DPF) initiative regeneration, therefore, can there be following hidden danger in the diesel motor that DPF is installed:
(1) if the too high levels of sulfide etc. in the composition of particulate; Because sulfide can not participated in burning, therefore can cause regeneration not exclusively, make exhaust back pressure continue to raise; Thereby influence the dynamic property of engine, and it is too high and damage the phenomenon of engine to occur temperature of exhaust gas easily;
(2) recovery time control is improper, causes the DPF internal temperature too high easily, damages the DPF parts.
In view of this, demand urgently being optimized design,, improve the serviceable life of engine and DPF parts to control the time of diesel motor micro particle catching initiative regeneration effectively to the control device of existing diesel motor micro particle catching regeneration.
Summary of the invention
To above-mentioned defective; The technical matters that the present invention solves is; A kind of engine exhaust back pressure pick-up unit is provided; Be used for exhaust back pressure,, improve the serviceable life of engine and DPF parts to control the time of diesel motor micro particle catching initiative regeneration effectively in the control system detection of engine of engine micro particle catching regeneration.On this basis, the present invention also provides a kind of diesel motor micro particle catching generation control system, method of this pick-up unit of application.
Engine exhaust back pressure pick-up unit provided by the invention comprises the housing of sleeve-like, the top cover with axially extending bore, push rod and elastomeric element, and a side opening of said housing is an air intake opening, and the inner walls at said air intake opening place is provided with annular boss; Said top seal is fixed on the opening of opposite side of said housing; Pass in the said axially extending bore of the upper end of said push rod on said top cover, the lower end of said push rod has the chassis that offsets or separate with said annular boss; Said elastomeric element places between said chassis and the said top cover; And the outer wall of said housing is provided with vent port, and axial dimension is greater than the thickness on said chassis between said vent port and the said chassis.
Preferably, said vent port is specially a plurality of, and is positioned on the same surface level.
Preferably, big up and small down round table-like in the bottom on said chassis, the round table-like excircle face on the end face of said annular boss and said chassis is suitable.
Preferably, said housing and top cover are that one shapes.
The control system of diesel motor micro particle catching regeneration provided by the invention comprises foregoing engine exhaust back pressure pick-up unit; Also comprise control circuit board, said housing is fixed on the gas outlet of diesel motor, and said air intake opening communicates with the inner chamber of said gas outlet; Said control circuit board has an open and shut valve and a controller; The axis of said push rod said housing in the effect lower edge of engine exhaust back pressure stretches out or withdraws; And the driving lever that drives said open and shut valve is switched on or switched off first contact or second contact; To the control signal of engine EDU unit output micro particle catching regeneration, said controller is output alarm signal when said second contacting when said first contacting for said controller.
Preferably, also comprise the reduction torsion spring that the said driving lever of control resets, the two ends of said reduction torsion spring are fixed with said driving lever and automobile chassis respectively.
Preferably, the top of said push rod is provided with roller, and said roller offsets with said driving lever under the effect of said reduction torsion spring.
Preferably, said push rod is spirally connected by upper and lower two sections and forms.
The control method of diesel motor micro particle catching regeneration provided by the invention, this method adopt foregoing engine exhaust back pressure pick-up unit to detect the present engine exhaust back pressure; If said present engine exhaust back pressure can't drive said push rod and stretch out, then control circuit board does not send any control signal; If said present engine exhaust back pressure drives said push rod and stretches out and the inner chamber of said gas outlet is communicated with said vent port; Then control circuit board is to the EDU unit of the engine output control signal of micro particle catching regeneration a period of time; And when being higher than said vent port, whenever repeated to send the regenerate control signal of a period of time of micro particle catching at a distance from one hour in the bottom surface on said chassis; If said present engine exhaust back pressure drives said push rod and contacts with said top cover, then the control circuit board output alarm signal.
Engine exhaust back pressure pick-up unit provided by the invention; Place the interior push rod lower end of housing of sleeve-like to be provided with a chassis, seal the air intake opening of housing one side, the opposite side opening is sealed by top cover; The upper end of push rod passes top cover; Housing is provided with vent port, and exhaust back pressure acts on the bottom surface on chassis through vent port, makes push rod extend out to first, second two working positions.This device provides reliable guarantee for the output that realizes regeneration control signal and alerting signal, can control the time of diesel motor micro particle catching initiative regeneration effectively, has improved the serviceable life of engine and DPF parts.
In a kind of optimized technical scheme of engine exhaust back pressure pick-up unit provided by the invention, big up and small down round table-like in the bottom on chassis, the round table-like excircle face on the end face of annular boss and said chassis is suitable.So design has strengthened the sealing property of chassis to air intake opening on the one hand, also can play guide effect to chassis mobile on the other hand, avoids the chassis receiving tilting when the engine exhaust back pressure is impacted and producing catching phenomenon.
The control system of diesel motor micro particle catching regeneration provided by the invention; Comprise above-mentioned detection device and control circuit board; Control circuit board is exported regeneration control signal or alerting signal respectively according to two kinds of working positions of pick-up unit output; Can control the time of diesel motor micro particle catching initiative regeneration effectively, the serviceable life of having improved engine and DPF parts.
In the another kind of optimized technical scheme of the control system of diesel motor micro particle catching regeneration provided by the invention; Said push rod is spirally connected by upper and lower two sections and forms; Through rotating epimere or hypomere, can finely tune to the extension elongation of push rod, to adapt to first, second contact A of contact, B.
Description of drawings
Fig. 1 is the engine exhaust back pressure pick-up unit profile synoptic diagram described in the embodiment;
Fig. 2 is the A-A sectional view shown in Fig. 1;
Fig. 3 is the control system structural representation of the diesel motor micro particle catching regeneration described in the embodiment.
Among the figure:
Exhaust back pressure pick-up unit 1, control circuit board 2;
Embodiment
Core of the present invention provides a kind of engine exhaust back pressure pick-up unit; Exhaust back pressure with detection of engine; Use the control system and the method for the diesel motor micro particle catching regeneration of this pick-up unit; The time of diesel motor micro particle catching regeneration be can control effectively, engine and DPF parts purpose in serviceable life improved thereby reach.Specify this embodiment below in conjunction with Figure of description.
In the present embodiment, vertically be set to example explanation with the exhaust back pressure pick-up unit of engine.Be to be understood that; Technical scheme provided by the present invention is equally applicable to the exhaust back pressure pick-up unit of engine is horizontally disposed with or is obliquely installed; Need only the corresponding layout in push rod end in the exhaust back pressure pick-up unit of control circuit board and engine be got final product, this being horizontally disposed with or being obliquely installed and repeat no more the exhaust back pressure pick-up unit of engine.
See also Fig. 1 and Fig. 2, wherein, Fig. 1 is the exhaust back pressure pick-up unit profile synoptic diagram of diesel motor described in the embodiment, and Fig. 2 is the A-A sectional view shown in Fig. 1.
As shown in the figure, this engine exhaust back pressure pick-up unit comprises housing 10 and top cover 20, push rod 30 and the elastomeric element 40 of sleeve-like.
The lower ending opening of housing 10 is an air intake opening 11, and the open upper end place is provided with internal thread, and top cover 20 spiral shells are contained on the open upper end of housing 10 the open upper end sealing with housing 10; In fact, push rod 30 can be processed respectively with chassis 32 again and combine through the mode that is spirally connected, and also can one shape.Top cover 20 has a vertically disposed axially extending bore, this axially extending bore and push rod 10 coaxial settings.The lower end of push rod 30 is fixed with the chassis that offsets or separate with the annular boss 14 at air intake opening place, and this chassis 32 can be identical with the internal diameter of housing 10 or different, as long as can realize for the unlatching of air intake opening 11 or close.The upper end of push rod 30 passes the axially extending bore from top cover 20 from bottom to top.
The bottom surface of the end face on chassis 32 and top cover 20 is provided with elastomeric element 40, with the elastic force that produces chassis 32 is pressed on the air intake opening 11 of housing 10, from top to bottom with air intake opening 11 sealings.Particularly, elastomeric element 40 adopts spring as shown in the figure, is provided with in the housing 10 and is sleeved on the push rod 30, and its upper/lower terminal offsets with the end face on chassis 32 and the bottom surface of top cover 20 respectively.
In order to improve the sealing property of 32 pairs of housing 10 air intake openings 11 in chassis, can do further to optimize to housing 10 air intake openings 11 places.See also Fig. 1, big up and small down round table-like in the bottom on chassis 32, the inwall at air intake opening 11 places of housing 10 lower ends is provided with annular boss 14, the end face of annular boss 14 and 32 bottoms, chassis round table-like excircle face suitable.So design, one side has strengthened the sealing property of the 32 pairs of air intake openings 11 in chassis, also can move up to chassis 32 on the other hand and play the effect of guiding, avoids chassis 32 receiving tilting when the engine exhaust back pressure is impacted, and produces catching phenomenon.
On the basis of the exhaust back pressure pick-up unit of above-mentioned engine; The present invention also provides a kind of control system with diesel motor micro particle catching regeneration of this pick-up unit; As shown in Figure 3; Fig. 3 shows the control system structural representation of diesel motor micro particle catching regeneration, and the control system of this diesel motor micro particle catching regeneration comprises the exhaust back pressure pick-up unit 1 of the engine with said structure and is fixedly installed on the control circuit board 2 on the automobile chassis.
Combine Fig. 1, shown in Figure 2 again, housing 10 is fixed on the gas outlet 50 of diesel motor and the air intake opening 11 of housing 10 communicates with the inner chamber of gas outlet 50, and like this, the exhaust back pressure in the gas outlet 50 acts on the bottom surface on chassis 32 through air intake opening 11.
Also be provided with the reduction torsion spring 22 that control driving lever 21 resets in the control system of diesel motor micro particle catching regeneration, the two ends of this reduction torsion spring 22 are fixed with driving lever 21 and automobile chassis respectively.When driving lever 21 upwards rotates when contacting with first contact at push rod 30 promotion lower edge hinge O1; Reduction torsion spring 22 is stretched; Driving lever 21 is had rotate the trend that resets, in case the exhaust back pressure of engine descends, driving lever 21 is swung down to initial position under the effect of reduction torsion spring 22; So the driving lever and first contact A are broken off.
In order to reduce the friction between push rod 30 tops and driving lever 21 lower surfaces, the top of push rod 30 is provided with roller 31, and roller 31 offsets with the lower surface of driving lever 21 under the effect of reduction torsion spring 22 all the time.
Because parts error in mechanical processing process can hardly be avoided, therefore, push rod also error in length can occur in process, and in addition, each parts also rigging error can occur unavoidably in assembling process.Based on mismachining tolerance and rigging error, when appearing at first working position or second working position possibly, the top of push rod can not contact with first contact A or the second contact B, thereby can't produce control signal corresponding.In order to address the above problem, the push rod 30 of this programme can be spirally connected by upper and lower two sections and form, and so just can the length of push rod 30 be finely tuned through rotating epimere or hypomere, to adapt to first, second contact A of contact, B, realizes contact reliably.
The present invention also provides a kind of control method of diesel motor micro particle catching regeneration; This method adopts aforesaid engine exhaust back pressure pick-up unit to detect the present engine exhaust back pressure; If the present engine exhaust back pressure is lower; Can't drive push rod and stretch out, then control circuit board does not send any control signal; If the present engine exhaust back pressure is higher; When driving push rod and extending out to first working position (this moment, the inner chamber of gas outlet communicated with vent port on the housing), then control circuit board was for example regenerated 5 minutes to the regenerate control signal of a period of time of the EDU unit of engine output micro particle catching; After 5 minutes; Whether control circuit board can detect first contact closed, if first contact still is in closure state, then repeats to send the micro particle catching control signal of regeneration a period of time; If the present engine exhaust back pressure drives push rod and contacts with top cover; Be that push rod extend out to second working position, explain that then exhaust back pressure is too big, particle trapper (DPF) needs cleaning; So the control circuit board output alarm signal, prompting operation person clears up particle trapper (DPF).
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (9)
1. engine exhaust back pressure pick-up unit is characterized in that comprising:
The housing of sleeve-like, one of which side opening are air intake opening, and the inner walls at said air intake opening place is provided with annular boss;
Top cover with axially extending bore, sealing and fixing is on the opening of the opposite side of said housing;
Push rod passes in its upper end said axially extending bore on said top cover, and the lower end of said push rod has the chassis that offsets or separate with said annular boss; With
Elastomeric element places between said chassis and the said top cover; And
The outer wall of said housing is provided with vent port, and axial dimension is greater than the thickness on said chassis between said vent port and the said chassis.
2. engine exhaust back pressure pick-up unit according to claim 1 is characterized in that said vent port is specially a plurality of, and is positioned on the same surface level.
3. engine exhaust back pressure pick-up unit according to claim 2 is characterized in that, big up and small down round table-like in the bottom on said chassis, and the round table-like excircle face on the end face of said annular boss and said chassis is suitable.
4. according to each described engine exhaust back pressure pick-up unit in the claim 1 to 3, it is characterized in that said housing and top cover are that one shapes.
5. the control system of diesel motor micro particle catching regeneration is characterized in that, comprises like each described engine exhaust back pressure pick-up unit in the claim 1 to 4; Also comprise control circuit board, said housing is fixed on the gas outlet of diesel motor, and said air intake opening communicates with the inner chamber of said gas outlet; Said control circuit board has an open and shut valve and a controller; The axis of said push rod said housing in the effect lower edge of engine exhaust back pressure stretches out or withdraws; And the driving lever that drives said open and shut valve is switched on or switched off first contact or second contact; To the control signal of engine EDU unit output micro particle catching regeneration, said controller is output alarm signal when said second contacting when said first contacting for said controller.
6. the control system of diesel motor micro particle catching regeneration according to claim 5 is characterized in that, also comprises the reduction torsion spring that the said driving lever of control resets, and the two ends of said reduction torsion spring are fixed with said driving lever and automobile chassis respectively.
7. the control system of diesel motor micro particle catching regeneration according to claim 6 is characterized in that the top of said push rod is provided with roller, and said roller offsets with said driving lever under the effect of said reduction torsion spring.
8. the control system of diesel motor micro particle catching regeneration according to claim 5 is characterized in that said push rod is spirally connected by upper and lower two sections and forms.
9. the control method of diesel motor micro particle catching regeneration is characterized in that,
Adopt engine exhaust back pressure pick-up unit as claimed in claim 1 to detect the present engine exhaust back pressure;
If said present engine exhaust back pressure can't drive said push rod and stretch out, then control circuit board does not send any control signal;
If said present engine exhaust back pressure drives said push rod and stretches out and the inner chamber of gas outlet is communicated with said vent port; Then control circuit board is to the EDU unit of the engine output control signal of micro particle catching regeneration a period of time; And when being higher than said vent port, whenever repeated to send the regenerate control signal of a period of time of micro particle catching at a distance from one hour in the bottom surface on said chassis;
If said present engine exhaust back pressure drives said push rod and contacts with said top cover, then the control circuit board output alarm signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110099881A CN102156048B (en) | 2011-04-20 | 2011-04-20 | Device for detecting engine exhaust back pressure as well as particle catch regeneration control system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110099881A CN102156048B (en) | 2011-04-20 | 2011-04-20 | Device for detecting engine exhaust back pressure as well as particle catch regeneration control system and method |
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| Publication Number | Publication Date |
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| CN102156048A CN102156048A (en) | 2011-08-17 |
| CN102156048B true CN102156048B (en) | 2012-09-05 |
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| CN201110099881A Active CN102156048B (en) | 2011-04-20 | 2011-04-20 | Device for detecting engine exhaust back pressure as well as particle catch regeneration control system and method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105758647B (en) * | 2014-12-16 | 2019-06-11 | 上汽通用五菱汽车股份有限公司 | A kind of exhaust back pressure test macro |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5138835A (en) * | 1990-05-23 | 1992-08-18 | Mercedes-Benz Ag | Diesel engine with an exhaust-gas filter |
| CN200944080Y (en) * | 2006-07-17 | 2007-09-05 | 重庆长安汽车股份有限公司 | Device for measuring exhaust back pressure of petrol engine |
| CN202007698U (en) * | 2011-04-20 | 2011-10-12 | 潍柴动力股份有限公司 | Engine exhaust back pressure detection device and particulate trapping regeneration control system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS639612A (en) * | 1986-06-30 | 1988-01-16 | Mitsubishi Motors Corp | Particulate trap regenerating signal detecting device |
| JPH04101010A (en) * | 1990-08-17 | 1992-04-02 | Mazda Motor Corp | Exhaust fine particle eliminating device for diesel engine |
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2011
- 2011-04-20 CN CN201110099881A patent/CN102156048B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5138835A (en) * | 1990-05-23 | 1992-08-18 | Mercedes-Benz Ag | Diesel engine with an exhaust-gas filter |
| CN200944080Y (en) * | 2006-07-17 | 2007-09-05 | 重庆长安汽车股份有限公司 | Device for measuring exhaust back pressure of petrol engine |
| CN202007698U (en) * | 2011-04-20 | 2011-10-12 | 潍柴动力股份有限公司 | Engine exhaust back pressure detection device and particulate trapping regeneration control system |
Non-Patent Citations (2)
| Title |
|---|
| JP平4-101010A 1992.04.02 |
| JP昭63-9612A 1988.01.16 |
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