CN202007698U - Engine exhaust back pressure detection device and particulate trapping regeneration control system - Google Patents
Engine exhaust back pressure detection device and particulate trapping regeneration control system Download PDFInfo
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- CN202007698U CN202007698U CN2011201179735U CN201120117973U CN202007698U CN 202007698 U CN202007698 U CN 202007698U CN 2011201179735 U CN2011201179735 U CN 2011201179735U CN 201120117973 U CN201120117973 U CN 201120117973U CN 202007698 U CN202007698 U CN 202007698U
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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 utility model discloses an engine exhaust back pressure detection device. An opening at one side of a sleeve-shaped shell is an air inlet, and a ring-shaped boss is arranged on the inner wall of the shell at the position of the air inlet; a top cover is provided with an axial through hole and is sealed and fixed on an opening at the other side of the shell; the upper end of an ejector rod penetrates through the axial through hole, and the lower end of the ejector rod is provided with a chassis which abuts against or separates from the ring-shaped boss; an elastic element is arranged between the chassis and the top cover; and the outer wall of the shell is provided with an exhaust hole, and the axial size between the exhaust hole and the chassis is greater than the thickness of the chassis. Based on the engine exhaust back pressure detection device, the utility model also provides a diesel engine particulate trapping regeneration control system applying the device. Under the action of an exhaust back pressure, the ejector rod stretches and retracts so that a control circuit board outputs a particulate trapping regeneration control signal or an alarm signal to effectively control the time of active regeneration of particulate trapping of a diesel engine, therefore, the service life of the engine and the service life of a DPF (Diesel Particulate Filter) component are prolonged.
Description
Technical field
The utility model relates to diesel engine emissions control field, is specifically related to a kind of engine exhaust back pressure detection device and uses the diesel engine micro particle catching generation control system of this device.
Background technique
Diesel engine is the main type of goods stock power source, because it has good power character 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 engine development is the problem of discharging.The main effulent of diesel engine 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 external purification technology reduces the particulate emission of diesel engine, 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 is subjected to people's favor.This technology is utilized the particle trapper (DPF) that is arranged on the engine exhaust pipe to filter overproof particulate simultaneously, thereby is reduced the discharging of harmful gas nitrogen oxide by participating in burning in the suction tude that waste gas is imported motor.But when the particulate that captures among the DPF was more and more, the exhaust back pressure of motor 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 motor when serious.Therefore the control gear 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 outlet pipe, the carbon microsphere of collecting among the DPF is changed into carbon dioxide discharge.
Yet find but that in actual applications because differential pressure pickup can only be monitored pressure reduction, can not determine the time of particle trapper (DPF) initiative regeneration, therefore, can there be following hidden danger in the diesel engine that DPF is installed:
(1) if the too high levels of sulphide etc. in the composition of particulate, because sulphide can not participate in burning, therefore can cause regeneration not exclusively, make exhaust back pressure continue to raise, thereby influence the power character of motor, and it is too high and damage the phenomenon of motor to occur temperature of exhaust gas easily;
(2) recovery time control is improper, causes the DPF inside temperature too high easily, damages the DPF parts.
In view of this, demand urgently being optimized design,, improve the working life of motor and DPF parts to control the time of diesel engine micro particle catching initiative regeneration effectively at the control gear of existing diesel engine micro particle catching regeneration.
The model utility content
At above-mentioned defective, the technical problem that the utility model solves is, a kind of engine exhaust back pressure detection device is provided, be used for exhaust back pressure in the control system detection of engine of motor micro particle catching regeneration, to control the time of diesel engine micro particle catching initiative regeneration effectively, improve the working life of motor and DPF parts.On this basis, the utility model also provides a kind of diesel engine micro particle catching generation control system of this detection device of application.
The engine exhaust back pressure detection device that the utility model provides comprises the housing of sleeve shape, the top cover with axial hole, push rod and elastic member, and a side opening of described housing is a suction port, and the inner walls at described suction port place is provided with annular boss; Described top seal is fixed on the opening of opposite side of described housing; Pass in the described axial hole of the upper end of described push rod on described top cover, the lower end of described push rod has the chassis that offsets or separate with described annular boss; Described elastic member places between described chassis and the described top cover; And the outer wall of described housing is provided with exhaust port, and axial dimension is greater than the thickness on described chassis between described exhaust port and the described chassis.
Preferably, described exhaust port is specially a plurality of, and is positioned on the same horizontal plane.
Preferably, big up and small down round table-like in the bottom on described chassis, the round table-like excircle face on the end face of described annular boss and described chassis is suitable.
Preferably, described housing and top cover are that one shapes.
The control system of the diesel engine micro particle catching regeneration that the utility model provides comprises foregoing engine exhaust back pressure detection device; Also comprise control circuit board, described housing is fixed on the outlet pipe of diesel engine, and described suction port communicates with the inner chamber of described outlet pipe; Described control circuit board has an on off switch and a controller, described push rod stretches out or withdraws at the axis of the described housing in the effect lower edge of engine exhaust back pressure, and the driving lever that drives described on off switch is switched on or switched off first contact or second contact, to the control signal of motor EDU unit output micro particle catching regeneration, described controller is output alarm signal when described second contacting when described first contacting for described controller.
Preferably, also comprise the reduction torsion spring that the described driving lever of control resets, the two ends of described reduction torsion spring are fixed with described driving lever and automobile chassis respectively.
Preferably, the top of described push rod is provided with roller, and described roller offsets with described driving lever under the effect of described reduction torsion spring.
Preferably, described push rod is spirally connected by upper and lower two sections and forms.
The engine exhaust back pressure detection device that the utility model provides, place the interior push rod lower end of housing of sleeve shape to be provided with a chassis, seal the suction port 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 exhaust port, and exhaust back pressure acts on the bottom surface on chassis through exhaust 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 alarm signal, can control the time of diesel engine micro particle catching initiative regeneration effectively, the working life of having improved motor and DPF parts.
In a kind of optimized technical scheme of engine exhaust back pressure detection device that the utility model provides, 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 described chassis is suitable.So design has strengthened the sealability of chassis to suction port on the one hand, also can play leading role to chassis mobile on the other hand, avoids the chassis being subjected to tilting when the engine exhaust back pressure is impacted and producing catching phenomenon.
The control system of the diesel engine micro particle catching regeneration that the utility model provides, comprise above-mentioned detection device and control circuit board, control circuit board is exported regeneration control signal or alarm signal respectively according to two kinds of working positions of detection device output, can control the time of diesel engine micro particle catching initiative regeneration effectively, the working life of having improved motor and DPF parts.
In the another kind of optimized technical scheme of control system of the diesel engine micro particle catching regeneration that the utility model provides, described push rod is spirally connected by upper and lower two sections and forms, by rotating epimere or hypomere, can finely tune at the extrusion of push rod, to adapt to first, second contact A of contact, B.
Description of drawings
Fig. 1 is the engine exhaust back pressure detection device profile schematic representation described in the embodiment;
Fig. 2 is the A-A sectional drawing shown in Fig. 1;
Fig. 3 is the control system structural representation of the diesel engine micro particle catching regeneration described in the embodiment.
Among the figure:
Exhaust back pressure detection device 1, control circuit board 2;
Embodiment
Core of the present utility model provides a kind of engine exhaust back pressure detection device, exhaust back pressure with detection of engine, use the control system of the diesel engine micro particle catching regeneration of this detection device, the time of diesel engine micro particle catching regeneration be can control effectively, motor and DPF parts purpose in working life improved thereby reach.Specify present embodiment below in conjunction with Figure of description.
In the present embodiment, vertically be set to example with the exhaust back pressure detection device of motor and be illustrated.Be to be understood that, technological scheme provided by the utility model is equally applicable to the exhaust back pressure detection device of motor is horizontally disposed with or is obliquely installed, the corresponding layout in push rod end in the exhaust back pressure detection device of control circuit board and motor need only be got final product, this being horizontally disposed with or being obliquely installed and repeat no more the exhaust back pressure detection device of motor.
See also Fig. 1 and Fig. 2, wherein, Fig. 1 is the exhaust back pressure detection device profile schematic representation of diesel engine described in the embodiment, and Fig. 2 is the A-A sectional drawing shown in Fig. 1.
As shown in the figure, this engine exhaust back pressure detection device comprises housing 10 and top cover 20, push rod 30 and the elastic member 40 of sleeve shape.
The lower ending opening of housing 10 is a suction port 11, and the upper end open place is provided with internal thread, and top cover 20 spiral shells are contained on the upper end open of housing 10 the upper end open sealing with housing 10; In fact, push rod 30 can be processed respectively with chassis 32 again and combine by the mode that is spirally connected, and also can one shape.Top cover 20 has a vertically disposed axial hole, this axial hole 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 suction port 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 suction port 11 or close.The upper end of push rod 30 passes the axial hole 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 elastic member 40, with the elastic force that produces chassis 32 is pressed on the suction port 11 of housing 10, from top to bottom with suction port 11 sealings.Particularly, elastic member 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 sealability of 32 pairs of housing 10 suction ports 11 in chassis, can do further to optimize at housing 10 suction ports 11 places.See also Fig. 1, big up and small down round table-like in the bottom on chassis 32, the inwall at suction port 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 sealability of the 32 pairs of suction ports 11 in chassis, also can move up to chassis 32 on the other hand and play the effect of guiding, avoids chassis 32 being subjected to tilting when the engine exhaust back pressure is impacted, and produces catching phenomenon.
On the basis of the exhaust back pressure detection device of above-mentioned motor, the utility model also provides a kind of control system with diesel engine micro particle catching regeneration of this detection device, as shown in Figure 3, Fig. 3 shows the control system structural representation of diesel engine micro particle catching regeneration, and the control system of this diesel engine micro particle catching regeneration comprises the exhaust back pressure detection device 1 and the control circuit board 2 that is fixedly installed on the automobile chassis of the motor with said structure.
Again in conjunction with Fig. 1, shown in Figure 2, housing 10 is fixed on the outlet pipe 50 of diesel engine and the suction port 11 of housing 10 communicates with the inner chamber of outlet pipe 50, and like this, the exhaust back pressure in the outlet pipe 50 acts on the bottom surface on chassis 32 by suction port 11.
Also be provided with the reduction torsion spring 22 that control driving lever 21 resets in the control system of diesel engine micro particle catching regeneration, the two ends of this reduction torsion spring 22 are fixed with driving lever 21 and automobile chassis respectively.When promoting lower edge hinge O1 at push rod 30, driving lever 21 upwards rotates when contacting with first contact, reduction torsion spring 22 is stretched, driving lever 21 is had rotate the trend that resets, in case the exhaust back pressure of motor 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 disconnect.
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 component error in mechanical processing process can hardly be avoided, therefore, push rod also error in length can occur in course of working, and in addition, each component also assembly error can occur unavoidably in assembling process.Based on machining error and assembly 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 by rotating epimere or hypomere, to adapt to first, second contact A of contact, B, realizes contact reliably.
Control system based on the regeneration of diesel engine micro particle catching, adopt aforesaid engine exhaust back pressure detection device 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 outlet pipe communicated with exhaust port on the housing), then control circuit board is to the EDU unit of the motor output control signal of micro particle catching regeneration a period of time, for example regenerated 5 minutes, after 5 minutes, whether control circuit board can detect first contact closed, if first contact still is in closed 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, illustrate 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 utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (8)
1. engine exhaust back pressure detection device is characterized in that comprising:
The housing of sleeve shape, one side opening are suction port, and the inner walls at described suction port place is provided with annular boss;
Top cover with axial hole, sealing and fixing is on the opening of the opposite side of described housing;
Push rod passes in its upper end described axial hole on described top cover, and the lower end of described push rod has the chassis that offsets or separate with described annular boss; With
Elastic member places between described chassis and the described top cover; And
The outer wall of described housing is provided with exhaust port, and axial dimension is greater than the thickness on described chassis between described exhaust port and the described chassis.
2. engine exhaust back pressure detection device according to claim 1 is characterized in that described exhaust port is specially a plurality of, and is positioned on the same horizontal plane.
3. engine exhaust back pressure detection device according to claim 2 is characterized in that, big up and small down round table-like in the bottom on described chassis, and the round table-like excircle face on the end face of described annular boss and described chassis is suitable.
4. according to each described engine exhaust back pressure detection device in the claim 1 to 3, it is characterized in that described housing and top cover are that one shapes.
5. the control system of diesel engine micro particle catching regeneration is characterized in that, comprises as each described engine exhaust back pressure detection device in the claim 1 to 4; Also comprise control circuit board, described housing is fixed on the outlet pipe of diesel engine, and described suction port communicates with the inner chamber of described outlet pipe; Described control circuit board has an on off switch and a controller, described push rod stretches out or withdraws at the axis of the described housing in the effect lower edge of engine exhaust back pressure, and the driving lever that drives described on off switch is switched on or switched off first contact or second contact, to the control signal of motor EDU unit output micro particle catching regeneration, described controller is output alarm signal when described second contacting when described first contacting for described controller.
6. the control system of diesel engine micro particle catching regeneration according to claim 5 is characterized in that, also comprises the reduction torsion spring that the described driving lever of control resets, and the two ends of described reduction torsion spring are fixed with described driving lever and automobile chassis respectively.
7. the control system of diesel engine micro particle catching regeneration according to claim 6 is characterized in that the top of described push rod is provided with roller, and described roller offsets with described driving lever under the effect of described reduction torsion spring.
8. the control system of diesel engine micro particle catching regeneration according to claim 5 is characterized in that described push rod is spirally connected by upper and lower two sections and forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201179735U CN202007698U (en) | 2011-04-20 | 2011-04-20 | Engine exhaust back pressure detection device and particulate trapping regeneration control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201179735U CN202007698U (en) | 2011-04-20 | 2011-04-20 | Engine exhaust back pressure detection device and particulate trapping regeneration control system |
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| Publication Number | Publication Date |
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| CN202007698U true CN202007698U (en) | 2011-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011201179735U Expired - Lifetime CN202007698U (en) | 2011-04-20 | 2011-04-20 | Engine exhaust back pressure detection device and particulate trapping regeneration control system |
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| CN (1) | CN202007698U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156048A (en) * | 2011-04-20 | 2011-08-17 | 潍柴动力股份有限公司 | Device for detecting engine exhaust back pressure as well as particle catch regeneration control system and method |
| CN104153857A (en) * | 2013-05-15 | 2014-11-19 | 罗伯特·博世有限公司 | Actively-regenerative tail gas aftertreatment system and active regeneration method thereof |
| CN109915267A (en) * | 2019-03-29 | 2019-06-21 | 潍柴动力股份有限公司 | A kind of switching method, device and the electronic controlled diesel of electronic controlled diesel operational mode |
-
2011
- 2011-04-20 CN CN2011201179735U patent/CN202007698U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156048A (en) * | 2011-04-20 | 2011-08-17 | 潍柴动力股份有限公司 | Device for detecting engine exhaust back pressure as well as particle catch regeneration control system and method |
| CN102156048B (en) * | 2011-04-20 | 2012-09-05 | 潍柴动力股份有限公司 | Device for detecting engine exhaust back pressure as well as particle catch regeneration control system and method |
| CN104153857A (en) * | 2013-05-15 | 2014-11-19 | 罗伯特·博世有限公司 | Actively-regenerative tail gas aftertreatment system and active regeneration method thereof |
| CN104153857B (en) * | 2013-05-15 | 2018-01-30 | 罗伯特·博世有限公司 | Can initiative regeneration exhaust gas aftertreatment system and its initiative regeneration method |
| CN109915267A (en) * | 2019-03-29 | 2019-06-21 | 潍柴动力股份有限公司 | A kind of switching method, device and the electronic controlled diesel of electronic controlled diesel operational mode |
| CN109915267B (en) * | 2019-03-29 | 2021-10-29 | 潍柴动力股份有限公司 | Method and device for switching operation modes of electric control diesel engine and electric control diesel engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111012 Effective date of abandoning: 20120905 |