CN207393348U - A kind of engine with supercharger egr system and vehicle - Google Patents
A kind of engine with supercharger egr system and vehicle Download PDFInfo
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- CN207393348U CN207393348U CN201721368559.5U CN201721368559U CN207393348U CN 207393348 U CN207393348 U CN 207393348U CN 201721368559 U CN201721368559 U CN 201721368559U CN 207393348 U CN207393348 U CN 207393348U
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- egr
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Abstract
The utility model discloses a kind of engine with supercharger egr system and vehicles, the egr system includes engine body and EGR valve, engine body and EGR valve form a gas-circulating system, cooler for recycled exhaust gas is provided between engine body and EGR valve, the exhaust gas that engine body generates enters EGR valve after cooler for recycled exhaust gas cools down, the inlet port and outlet port of EGR valve are connected by pressure measurement pipeline with a device for pressure measurement, pressure measuring tube road is provided with condensed water collecting device, the vapor that the condensed water collecting device is collected in exhaust gas enters after pressure measurement pipeline the condensed water for condensing generation.The utility model makes the vapor in exhaust gas enter in pressure measurement pipeline to condense the condensed water of generation and flow in condensed water collecting device by gravity, EGR valve both sides pressure difference data abnormal phenomenon caused by solving water vapor condensation, it ensure that the accuracy of engine EGR rate control and normal, application of the promotion EGR technology on engine with supercharger of engine combustion and oil consumption performance.
Description
Technical field
The utility model is related to technical field of engines more particularly to a kind of engine with supercharger egr systems and vehicle.
Background technology
With the deterioration of people's living environment, the shortage of the energy, many countries are all energy saving, reduction disposal of pollutants work
It is proposed for the outline of country.It is energy saving and it is environmentally friendly be development of automobile direction, will to automobile fuel consumption and discharge with the concern of people
Ask increasingly stringenter.But in order to accomplish cost and oil consumption, discharge it is balanced, more new technologies are because cost reason can not adapt to
Country's miniature gasoline engine at present, wherein EGR (recycling of Exhaust GasRecirculation- exhaust gas) technology be it is inexpensive,
Low emission, the preferred embodiment of low oil consumption.Exhaust gas, which recycles, refers to the portion of engine discharge to be transmitted back to inlet manifold, and
With being again introduced into cylinder together with incoming mixture.Due to containing substantial amounts of CO in exhaust gas2Grade polyatomic gas, and CO2Wait gases not
It can burn and but absorb substantial amounts of heat since its specific heat capacity is high, make the maximum combustion temperature of gaseous mixture in cylinder reduce, so as to subtract
NO is lackedXGrowing amount.
, it is necessary to be installed before and after EGR valve in engine with supercharger egr system (in particular low pressure EGR system) course of work
Differential pressure pickup, for gathering the pressure difference data before and after EGR valve, for the measurement of EGR rate, and then by adjusting engine EGR
Rate reduces the oil consumption of engine.But in engine EGR system work process, the experimentation especially in application egr system
In, exhaust gas by cooler for recycled exhaust gas cool down, subsequently by egr system when, pressure measuring tube can be entered by having portion
Road, the vapor in exhaust gas easily condense in the sensor pipeline of measurement pressure, and aggregation of the condensed water in pipeline can influence EGR
The accuracy of valve both sides pressure difference data, and then influence the control of engine EGR rate and fuel consumption performance.
Utility model content
The purpose of this utility model is to provide a kind of engine with supercharger egr systems, solve existing engine EGR system
Differential pressure pickup measures pipeline pressure data abnormal problem caused by water vapor condensation, while provides and be provided with supercharging hair
The vehicle of motivation egr system.
In order to solve the above-mentioned technical problem, the utility model proposes a kind of engine with supercharger egr system, including engine
Body and EGR valve, the engine body and the EGR valve form a gas-circulating system, the engine body and institute
It states and cooler for recycled exhaust gas is provided between EGR valve, the exhaust gas that the engine body generates enters after cooler for recycled exhaust gas cooling
The EGR valve, the inlet port and outlet port of the EGR valve are connected by pressure measurement pipeline and a device for pressure measurement
Logical, the pressure measuring tube road is provided with condensed water collecting device, the condensed water collecting device, for collecting the exhaust gas
In vapor into the condensed water that generation is condensed after the pressure measurement pipeline.
Further, the condensed water collecting device include first connecting portion, second connecting portion and water collecting part, described first
Connecting portion and the second connecting portion are connected with the water collecting part, end of the first connecting portion away from the water collecting part with
And end of the second connecting portion away from the water collecting part is connected with the pressure measurement pipeline, the first connecting portion is leaned on
The nearly EGR valve is set, and the second connecting portion is set close to the device for pressure measurement, the water collecting part, for collecting
Vapor in exhaust gas is stated into the condensed water that generation is condensed after the pressure measurement pipeline.
Preferably, the first connecting portion and the second connecting portion are separately positioned in the middle part of the both ends of the water collecting part.
Further, the gas outlet of the EGR valve passes sequentially through the first connecting tube, the second connecting tube and inlet manifold and institute
The entrance connection of engine body is stated, the outlet of the engine body passes sequentially through exhaust manifold, the 3rd connecting tube and the 4th
Connecting tube is connected with the air inlet of the EGR valve.
Further, fresh air conveying pipe is provided between first connecting tube and second connecting tube, it is described
Fresh air conveying pipe connects respectively with first connecting tube and second connecting tube；
The fresh air conveying pipe, for conveying fresh air；
First connecting tube, the 3rd connecting tube and the 4th connecting tube are used to convey what the engine body generated
Exhaust gas；
Second connecting tube, for conveying the mixture of fresh air and exhaust gas composition to the engine body.
Further, the cooler for recycled exhaust gas is arranged in the 4th connecting tube, the 3rd connecting tube and the described 4th
Ternary catalyzing unit is additionally provided between connecting tube.
Further, the pressure measurement pipeline includes first pressure measurement pipeline and second pressure measurement pipeline, described
One end of first pressure measurement pipeline is connected with first connecting tube, and the other end is connected with the device for pressure measurement, described
One end of second pressure measurement pipeline is connected with the 4th connecting tube, and the other end is connected with the device for pressure measurement, described
First pressure measures pipeline and second pressure measurement pipe road is both provided with the condensed water collecting device.
Preferably, the device for pressure measurement is differential pressure pickup.
Correspondingly, the utility model additionally provides a kind of vehicle, and supercharging described above is provided on the vehicle and is started
Machine egr system.
Implement the utility model, have the advantages that：The utility model is in egr system differential pressure pickup pressure measurement
Increase a condensed water collecting device in pipeline, for exhaust gas after cooler for recycled exhaust gas cools down, the vapor in exhaust gas enters pressure survey
The condensed water of generation is condensed in buret road to be flow to by gravity in condensed water collecting device, solve EGR caused by water vapor condensation
Valve both sides pressure difference data abnormal phenomenon ensure that the accuracy of engine EGR rate control, and then ensure engine combustion and oil consumption
What is showed is normal, so as to promote application of the EGR technology on engine with supercharger.
Description of the drawings
It, below will be to institute in embodiment or description of the prior art in order to illustrate more clearly of the technical solution of the utility model
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some of the utility model
Embodiment, for those of ordinary skill in the art, without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is the theory structure schematic diagram of the engine EGR system of the utility model；
Fig. 2 is the first structure diagram of the condensed water collecting device of the utility model；
Fig. 3 be Fig. 2 a-a to sectional view；
Fig. 4 is the catenation principle structure diagram between the condensed water collecting device in Fig. 2 and pressure measurement pipeline；
Fig. 5 is operation principle structure diagram of the condensed water collecting device in practical work process in Fig. 2；
Fig. 6 is second of structure diagram of the condensed water collecting device of the utility model；
Fig. 7 is the catenation principle structure diagram between the condensed water collecting device in Fig. 6 and pressure measurement pipeline；
Fig. 8 is operation principle structure diagram of the condensed water collecting device in practical work process in Fig. 6.
Wherein, reference numeral corresponds in figure：1- engine bodies, 2-EGR valves, 3-EGR coolers, 4- pressure measuring tubes
Road, 401- first pressures measurement pipeline, 402- second pressures measurement pipeline, 5- device for pressure measurement, 6- condensed water collecting devices,
601- first connecting portions, 602- second connecting portions, 603- water collecting parts, the first connecting tubes of 7-, the second connecting tubes of 8-, 9- air inlet discriminations
Pipe, 10- exhaust manifolds, the 3rd connecting tubes of 11-, the 4th connecting tubes of 12-, 13- fresh air conveying pipes, 14- ternary catalyzing units.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, the technical solution in utility model embodiment is carried out clear
Chu is fully described by, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole realities
Apply example.Embodiment based on the utility model, those of ordinary skill in the art institute on the premise of creative work is not made
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment 1
As shown in Figure 1, present embodiment discloses a kind of engine with supercharger egr system, including engine body 1 and EGR valve
2, a gas-circulating system is formed between the engine body 1 and the EGR valve 2, the gas outlet of the EGR valve 2 is successively
It is connected by the first connecting tube 7, the second connecting tube 8 and inlet manifold 9 with the entrance of the engine body 1, the engine
The outlet of body 1 passes sequentially through the air inlet of exhaust manifold 10, the 3rd connecting tube 11 and the 4th connecting tube 12 and the EGR valve 2
Connection, is provided with cooler for recycled exhaust gas 3 between the engine body 1 and the EGR valve 2, the engine body 1 generates useless
Gas is arranged on the 4th connecting tube 12 after the cooler for recycled exhaust gas 3 cooling into the EGR valve 2, the cooler for recycled exhaust gas 3
On, it is additionally provided with ternary catalyzing unit 14 between the 3rd connecting tube 11 and the 4th connecting tube 12.Certainly, except above-mentioned knot
Outside structure, engine with supercharger egr system further includes the charge air cooler being not shown in figure, temperature sensor, pressure sensor, turbocharging
The structures such as device.
Fresh air conveying pipe 13, the fresh sky are provided between first connecting tube 7 and second connecting tube 8
Letter shoot 13 connects respectively with first connecting tube 7 and second connecting tube 8；
The fresh air conveying pipe 13, for conveying fresh air；
First connecting tube 7, the 3rd connecting tube 11 and the 4th connecting tube 12 are used to convey the engine body 1
The exhaust gas of generation；
Second connecting tube 8, for conveying the mixture of fresh air and exhaust gas composition to the engine body 1.
Continue as shown in Figure 1, variety classes gas transmission direction with mark A, B, C represent, wherein, position A expression EGR
Exhaust gas enters the threeway position of engine system, and position B represents the airintake direction of fresh air, and position C represents going out for EGR exhaust
Gas direction.
, it is necessary to install differential pressure pickup before and after EGR valve in the engine with supercharger egr system course of work, for gathering
Pressure difference data before and after EGR valve for the measurement of EGR rate, and then by adjusting engine EGR rate, reduces the oil consumption of engine,
The inlet port (position D in Fig. 1) of the EGR valve 2 and the pressure difference data of outlet port (position C in Fig. 1) are measured, if point
Pressure sensor is not set respectively in the front and back position of EGR valve, measures the pressure data of inlet port and outlet port, meeting respectively
Increase use cost.
The present embodiment makes the inlet port (position D in Fig. 1) and outlet of the EGR valve 2 from the angle for reducing cost
Mouth end (position C in Fig. 1) is connected by pressure measurement pipeline 4 with a device for pressure measurement 5, which is pressure
Gap sensor measures the pressure of 2 front and rear ends of EGR valve by the differential pressure pickup.
But exhaust gas is cooled down by cooler for recycled exhaust gas, and during egr system, pressure can be entered by having portion
Pipeline 4 is measured, the vapor in exhaust gas easily condenses in pressure piping 4 is measured, and aggregation of the condensed water in pipeline can influence EGR
The accuracy of valve both sides pressure difference data.
In order to solve the engine EGR system pressure difference abnormal problem caused by condensed water, the present embodiment is surveyed in the pressure
Condensed water collecting device 6 is set on buret road 4, the condensed water collecting device 6 be used to collecting vapor in the exhaust gas into
Enter to condense after the pressure measurement pipeline 4 condensed water of generation, the condensed water collecting device 6 may be configured as being removably installed
On the pressure measurement pipeline 4.Specifically, the pressure measurement pipeline 4 includes the first pressure measurement pressure of pipeline 401 and second
Power measures pipeline 402, and one end of first pressure measurement pipeline 401 is connected with first connecting tube 7, the other end with it is described
Device for pressure measurement 5 connects, and one end of the second pressure measurement pipeline 402 is connected with the 4th connecting tube 12, the other end
It is connected with the device for pressure measurement 5, on the first pressure measurement pipeline 401 and second pressure measurement pipeline 402
It is provided with the condensed water collecting device 6.
The condensed water in pressure measurement pipeline in the present embodiment can be flow to by gravity in condensed water collecting device, and then is solved
Certainly pressure data abnormal phenomenon caused by vapor ensures the accuracy of engine EGR rate control, so as to which EGR technology be promoted to exist
Application on engine with supercharger.
Embodiment 2
The present embodiment gives a kind of concrete structure of the condensed water collecting device 6 on the basis of embodiment 1.
As shown in Figures 2 and 3, the condensed water collecting device 6 in the present embodiment is connected including first connecting portion 601, second
Portion 602 and water collecting part 603, the shape of the first connecting portion 601, second connecting portion 602 and water collecting part 603 is cylinder
Shape, the first connecting portion 601 and the second connecting portion 602 are connected with the water collecting part 603, the first connecting portion
601 and the second connecting portion 602 be separately positioned in the middle part of the both ends of the water collecting part 603, the shape of the first connecting portion 601
Shape is identical with the shape of the second connecting portion 602.Wherein, the water collecting part 603 is stretched into 602 part of second connecting portion
It sets, i.e., a part for described second connecting portion 602 is arranged on the inside of water collecting part 603, and another part is arranged on described catchment
The outside in portion 603 can effectively prevent the condensed water in water collecting part from flowing to differential pressure pickup along pressure measurement pipeline.
As shown in figure 4, end and the second connecting portion of the first connecting portion 601 away from the water collecting part 603
602 ends away from the water collecting part 603 are connected with the pressure measurement pipeline 4, and the first connecting portion 601 is close to described
EGR valve 2 is set, and the second connecting portion 602 is set close to the device for pressure measurement 5.
Fig. 4 is the catenation principle structure diagram between condensed water collecting device and pressure measurement pipeline, and practical application
In, pressure measurement pipeline 4 is to be in tilted layout, as shown in figure 5, being arranged on the condensed water collecting device 6 of pressure measuring tube road
And be in tilted layout, the condensed water of the pressure measurement pipeline tube wall of inclination arrangement is attached to, under gravity, flow to collection
The bottom in water portion 603 avoids condensed water and is gathered in thinner pressure measurement pipeline, blocking pipeline, influences pressure value measurement
Accuracy.The water collecting part 603 is stretched into because of 602 part of second connecting portion in the present embodiment to set, it is possible to effectively keep away
Exempt from condensed water and flow directly into the device for pressure measurement 5 along second connecting portion 602, in addition, the condensed water in the present embodiment is received
Acquisition means 6 are removably disposed in the pressure measuring tube road, can aperiodically replace, clear up the condensation water collection dress
6 are put, use for a long time is avoided to cause in water collecting part 603, and condensed water accumulation is excessive, and the height of condensed water is higher by second connecting portion 602
The length being arranged in the water collecting part, condensed water along second connecting portion 602 flow into device for pressure measurement 5 the defects of.
Embodiment 3
The present embodiment gives another concrete structure of the condensed water collecting device 6 on the basis of embodiment 1.
As shown in fig. 6, the condensed water collecting device 6 in the present embodiment includes first connecting portion 601, second connecting portion 602
With water collecting part 603, the shape of the first connecting portion 601 and second connecting portion 602 is cylindrical, the water collecting part 603
Front view is convex shape, and the first connecting portion 601 and the second connecting portion 602 are connected with the water collecting part 603, described
First connecting portion 601 and the second connecting portion 602 are separately positioned in the middle part of the both ends of the water collecting part 603, and described first connects
The shape of socket part 601 is identical with the shape of the second connecting portion 602.Wherein, 602 part of second connecting portion is stretched into described
Water collecting part 603 is set, i.e., a part for described second connecting portion 602 is arranged on the inside of water collecting part 603, and another part is arranged on
The outside of the water collecting part 603 can effectively prevent the condensed water in water collecting part from flowing to pressure difference sensing along pressure measurement pipeline
Device.
As shown in fig. 7, end and the second connecting portion of the first connecting portion 601 away from the water collecting part 603
602 ends away from the water collecting part 603 are connected with the pressure measurement pipeline 4, and the first connecting portion 601 is close to described
EGR valve 2 is set, and the second connecting portion 602 is set close to the device for pressure measurement 5.
Fig. 7 is the catenation principle structure diagram between condensed water collecting device and pressure measurement pipeline, and practical application
In, pressure measurement pipeline 4 is to be in tilted layout, as shown in figure 8, being arranged on the condensed water collecting device 6 of pressure measuring tube road
And be in tilted layout, the condensed water of the pressure measurement pipeline tube wall of inclination arrangement is attached to, under gravity, is flow to convex
The bottom of font water collecting part 603 avoids condensed water and is gathered in thinner pressure measurement pipeline, and blocking pipeline influences pressure
It is worth the accuracy of measurement.The water collecting part 603 is stretched into because of 602 part of second connecting portion in the present embodiment to set, it is possible to
Effectively condensed water is avoided to flow directly into the device for pressure measurement 5 along second connecting portion 602, in addition, cold in the present embodiment
Condensed water collection device 6 is removably disposed in the pressure measuring tube road, can aperiodically replace, clear up the condensed water
Collection device 6, use for a long time is avoided to cause in water collecting part 603, and condensed water accumulation is excessive, and the height of condensed water is higher by the second company
Socket part 602 is arranged on the length in the water collecting part, and condensed water flows into the device for pressure measurement 5 along second connecting portion 602
The defects of.
Certainly, the concrete structure of condensed water collecting device is in addition to the structure defined in the present embodiment and embodiment 1, also
Can be other structures, as long as it can have the water collecting part for collecting condensed water.
Embodiment 4
Present embodiment discloses a kind of vehicle, the supercharging hair as described in embodiment 1- embodiments 3 is provided on the vehicle
Motivation egr system.
The embodiment of the utility model, has the advantages that：The utility model is in egr system differential pressure pickup pressure
Measuring increases a condensed water collecting device in pipeline, for exhaust gas after cooler for recycled exhaust gas cools down, the vapor in exhaust gas enters pressure
The condensed water of generation is condensed in power measurement pipeline to be flow to by gravity in condensed water collecting device, caused by solving water vapor condensation
EGR valve both sides pressure difference data abnormal phenomenon, ensure that engine EGR rate control accuracy, and then ensure engine combustion and
Oil consumption shows normal, so as to promote application of the EGR technology on engine with supercharger.
Above disclosed is only the several preferred embodiments of the utility model, cannot limit this reality with this certainly
With new interest field, therefore the equivalent variations made according to the utility model claims, still belong to the utility model and covered
Scope.
Claims (10)
1. a kind of engine with supercharger egr system, including engine body (1) and EGR valve (2), the engine body (1) and institute
It states EGR valve (2) and forms a gas-circulating system, it is cold to be provided with EGR between the engine body (1) and the EGR valve (2)
But device (3), the exhaust gas that the engine body (1) generates enter the EGR valve (2) after the cooler for recycled exhaust gas (3) cooling,
It is characterized in that, the inlet port and outlet port of the EGR valve (2) pass through pressure measurement pipeline (4) and a pressure measurement
Device (5) connects, and condensed water collecting device (6), the condensed water collecting device are provided on the pressure measurement pipeline (4)
(6) condensed water that the vapor in the exhaust gas condenses generation into the pressure measurement pipeline (4) afterwards is collected.
2. engine with supercharger egr system according to claim 1, which is characterized in that condensed water collecting device (6) bag
Include first connecting portion (601), second connecting portion (602) and water collecting part (603), the first connecting portion (601) and described second
Connecting portion (602) is connected with the water collecting part (603), end of the first connecting portion (601) away from the water collecting part (603)
The end of portion and the second connecting portion (602) away from the water collecting part (603) connects with the pressure measurement pipeline (4)
Logical, the first connecting portion (601) is set close to the EGR valve (2), and the second connecting portion (602) is surveyed close to the pressure
It measures device (5) to set, after the vapor that the water collecting part (603) is collected in the exhaust gas enters the pressure measurement pipeline (4)
Condense the condensed water of generation.
3. engine with supercharger egr system according to claim 2, which is characterized in that the first connecting portion (601) and institute
Second connecting portion (602) is stated to be separately positioned in the middle part of the both ends of the water collecting part (603).
4. engine with supercharger egr system according to claim 1, which is characterized in that the gas outlet of the EGR valve (2) according to
It is secondary to be connected by the first connecting tube (7), the second connecting tube (8) and inlet manifold (9) with the entrance of the engine body (1),
The outlet of the engine body (1) pass sequentially through exhaust manifold (10), the 3rd connecting tube (11) and the 4th connecting tube (12) with
The air inlet connection of the EGR valve (2).
5. engine with supercharger egr system according to claim 4, which is characterized in that first connecting tube (7) with it is described
It is provided with fresh air conveying pipe (13) between second connecting tube (8), the fresh air conveying pipe (13) is respectively with described
One connecting tube (7) is connected with second connecting tube (8).
6. engine with supercharger egr system according to claim 5, which is characterized in that the cooler for recycled exhaust gas (3) is arranged on
On 4th connecting tube (12).
7. engine with supercharger egr system according to claim 6, which is characterized in that the 3rd connecting tube (11) and institute
It states and is additionally provided with ternary catalyzing unit (14) between the 4th connecting tube (12).
8. engine with supercharger egr system according to claim 7, which is characterized in that the pressure measurement pipeline (4) includes
First pressure measurement pipeline (401) and second pressure measurement pipeline (402), one end of the first pressure measurement pipeline (401)
It is connected with first connecting tube (7), the other end is connected with the device for pressure measurement (5), and the second pressure measures pipeline
(402) one end is connected with the 4th connecting tube (12), and the other end is connected with the device for pressure measurement (5), and described first
The condensed water collecting device (6) is both provided on pressure measurement pipeline (401) and second pressure measurement pipeline (402).
9. engine with supercharger egr system according to claim 8, which is characterized in that the device for pressure measurement (5) is pressure
Gap sensor.
10. a kind of vehicle, which is characterized in that the supercharging described in just like any one in claim 1-9 is set on the vehicle
Engine EGR system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721368559.5U CN207393348U (en) | 2017-10-23 | 2017-10-23 | A kind of engine with supercharger egr system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721368559.5U CN207393348U (en) | 2017-10-23 | 2017-10-23 | A kind of engine with supercharger egr system and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207393348U true CN207393348U (en) | 2018-05-22 |
Family
ID=62329751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721368559.5U Active CN207393348U (en) | 2017-10-23 | 2017-10-23 | A kind of engine with supercharger egr system and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207393348U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112211756A (en) * | 2020-09-26 | 2021-01-12 | 昆明云内动力股份有限公司 | Low-pressure EGR system and gas flow control method |
| CN115217683A (en) * | 2021-11-30 | 2022-10-21 | 广州汽车集团股份有限公司 | Method and system for monitoring pressure difference of EGR valve and detecting pipeline fault |
-
2017
- 2017-10-23 CN CN201721368559.5U patent/CN207393348U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112211756A (en) * | 2020-09-26 | 2021-01-12 | 昆明云内动力股份有限公司 | Low-pressure EGR system and gas flow control method |
| CN115217683A (en) * | 2021-11-30 | 2022-10-21 | 广州汽车集团股份有限公司 | Method and system for monitoring pressure difference of EGR valve and detecting pipeline fault |
| CN115217683B (en) * | 2021-11-30 | 2023-08-15 | 广州汽车集团股份有限公司 | Method and system for detecting pipeline faults by monitoring differential pressure of EGR valve |
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