CN106988945A - Fault diagnosis instrument and method for gas nozzle of diesel ignition type engine - Google Patents
Fault diagnosis instrument and method for gas nozzle of diesel ignition type engine Download PDFInfo
- Publication number
- CN106988945A CN106988945A CN201710241007.6A CN201710241007A CN106988945A CN 106988945 A CN106988945 A CN 106988945A CN 201710241007 A CN201710241007 A CN 201710241007A CN 106988945 A CN106988945 A CN 106988945A
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- nozzle
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- 238000003745 diagnosis Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims description 28
- 238000001514 detection method Methods 0.000 claims description 35
- 239000002283 diesel fuel Substances 0.000 claims description 20
- 238000002405 diagnostic procedure Methods 0.000 claims description 17
- 230000004888 barrier function Effects 0.000 claims description 9
- 238000004364 calculation method Methods 0.000 claims description 9
- 238000010338 mechanical breakdown Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 47
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 239000003345 natural gas Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
-
- 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
- Y02T10/40—Engine management systems
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Testing Of Engines (AREA)
Abstract
A fault diagnosis instrument for the gas nozzle of diesel ignition engine is composed of signal receiving module, mechanical or electric circuit fault diagnosis module, leakage fault diagnosis module and signal output module, which are electrically connected to the input terminals of engine speed sensor, gas rail pressure sensor and nozzle open-close state detector and the output terminals of said modules. The design can effectively realize the diagnosis of the nozzle mechanism, the circuit and the leakage fault.
Description
Technical field
The invention belongs to locomotive engine technical field, and in particular to a kind of diesel oil ignited formula engine gas Nozzle failures
Diagnostic equipment and its diagnostic method, it is adaptable to realize the diagnosis of the circuit, machinery and leakage failure of nozzle.
Background technology
Diesel oil ignited formula natural gas engine be diesel engine transform as natural gas engine pass through frequently with refiting scheme.Together
Gasoline engine is compared with diesel engine, and the combustion process of diesel oil ignited formula natural gas engine is very special, with DIESEL and OTTO
The dual characteristicses of circulating combustion, and intercouple between the two.With the development of auto industry, in-circuit diagnostic system is in the modern times
Position in automobile services system is also more and more important.Concentrate and carry out fault diagnosis and information transfer, be failure in vehicle maintenance
The major technique foundation of diagnosis is Automotive Standardization, integrated embodiment.
Chinese patent application publication No. is CN103670756A, and the application day for announcing is the patent of invention on March 26th, 2014
A kind of combustion gas electric-control motor nozzle controller based on CPLD is disclosed, includes Nozzle failures diagnostic module inside it, should
Ejection failure real-time diagnosis module is used to enable at nozzle operation current sampling data, nozzle self induction voltage, battery voltage and nozzle
Signal is as input, and the fault type that delivery nozzle is obtained after handling by analysis is open circuit or short circuit.The device is only capable of being diagnosed to be
The fault of nozzle, and can not then judge for nozzle whether there is mechanical breakdown.
The content of the invention
The purpose of the present invention be overcome prior art exist the problem of can not diagnosing the mechanical breakdown of gas nozzle there is provided
A kind of diesel oil ignited formula engine gas Nozzle failures diagnostic equipment of the mechanically and electrically road failure that gas nozzle can be diagnosed to be and
Its diagnostic method.
To realize object above, technical scheme is as follows：
Signal receiving module, machine are provided with a kind of diesel oil ignited formula engine gas Nozzle failures diagnostic equipment, the diagnostic equipment
Tool or circuit fault diagnosis module, signal output module, the input and engine speed sensor of the signal receiving module,
Gas rail pressure sensor, nozzle open and-shut mode detection means are electrically connected, and the output end of signal receiving module passes through the event of mechanically or electrically road
Barrier diagnostic module and the input of signal output module are electrically connected.
Leakage failure diagnostic module, the input and letter of the leakage failure diagnostic module are additionally provided with the diagnostic equipment
The output end of number receiving module is electrically connected, and the output end of leakage failure diagnostic module and the input of signal output module are electrically connected.
A kind of diagnostic method of diesel oil ignited formula engine gas Nozzle failures diagnostic equipment, including mechanically or electrically road failure is examined
Disconnected method；
The mechanically or electrically road method for diagnosing faults refers to：Under engine idling condition, the signal receiving module connects in real time
Receive from engine speed sensor, gas rail pressure sensor, nozzle open and-shut mode detection means detection signal, and sent out
Deliver to mechanically or electrically road fault diagnosis module, then open a certain nozzle, and be closed other nozzles, then machinery or
Detection signal before and after circuit fault diagnosis module opens the nozzle received carries out comparing calculation, and according to result of calculation
Diagnosis nozzle whether there is mechanically or electrically road failure, finally sends diagnostic result to signal output module.
In the mechanically or electrically road method for diagnosing faults, it is according to result of calculation diagnosis nozzle whether there is mechanically or electrically road failure
Refer to：
If it is unchanged to calculate nozzle open and-shut mode before and after delivery nozzle is opened, engine speed, gas rail pressure power, circuit is diagnosed as
Failure；
If calculating nozzle open and-shut mode before and after delivery nozzle is opened to change, the gentle rail pressure power of engine speed is unchanged, then diagnoses
For mechanical breakdown；
If calculating nozzle open and-shut mode before and after delivery nozzle is opened to change, engine speed rises, and gas rail pressure power declines, then diagnoses
For without machinery or fault.
The fault diagnosis module also include leakage failure diagnostic module, the input of the leakage failure diagnostic module with
Signal receiving module is electrically connected, and output end and the signal output module of leakage failure diagnostic module are electrically connected；
The diagnostic method also includes leakage method for diagnosing faults；
The leakage method for diagnosing faults refers to：Under engine idling condition, the signal receiving module real-time reception comes from
Engine speed sensor, gas rail pressure sensor, the detection signal of nozzle open and-shut mode detection means and sending it to are let out
Fault diagnosis module is leaked, subsequent leakage failure diagnostic module diagnoses nozzle according to the detection signal contrast in the time T received
Leakage failure is whether there is, and diagnostic result is sent to signal output module.
In the leakage method for diagnosing faults, whether there is according to the detection signal contrast diagnosis nozzle in the time T received
Leakage failure refers to：
If it is unchanged to calculate delivery nozzle open and-shut mode, engine speed rises, and gas rail pressure power declines, then is diagnosed as internal leakage event
Barrier；
If calculating delivery nozzle open and-shut mode and engine speed are unchanged, and gas rail pressure power declines, then is diagnosed as external leakage event
Barrier；
If it is unchanged to calculate delivery nozzle open and-shut mode, engine speed, gas rail pressure power, it is diagnosed as without leakage failure.
Compared with prior art, beneficial effects of the present invention are：
1st, set in the present invention a kind of diesel oil ignited formula engine gas Nozzle failures diagnostic equipment and its diagnostic method in diagnostic equipment
There are signal receiving module, mechanically or electrically road fault diagnosis module, signal output module, the input of signal receiving module is with starting
Machine speed probe, gas rail pressure sensor, nozzle open and-shut mode detection means are electrically connected, and output end passes through mechanically or electrically road failure
Diagnostic module and the input of signal output module are electrically connected, under engine idling condition, and the design is by opening a certain nozzle
And other nozzles is investigated the front and rear changes of engine speed, gas rail pressure power and nozzle open and-shut mode these three parameters after closing
Change, whether have machinery or road failure, and can determine whether out it is which nozzle have failure, significantly if can not only diagnose delivery nozzle
Improve the detection efficiency of nozzle.Therefore, the present invention realizes the efficient diagnosis of nozzle mechanically or electrically road failure.
2nd, in the present invention a kind of diesel oil ignited formula engine gas Nozzle failures diagnostic equipment and its diagnostic method in diagnostic equipment
Be additionally provided with leakage failure diagnostic module, the input, output end of the leakage failure diagnostic module respectively with signal receiving module
Output end, the input of signal output module be electrically connected, when nozzle is closed, started by investigating under idling operation
Change of the gentle rail pressure power of machine rotating speed in time T can effectively judge nozzle with the presence or absence of internal leakage work external leakage.Therefore,
The diagnosis of the achievable nozzle leakage failure of the present invention.
Brief description of the drawings
Fig. 1 is structured flowchart of the invention.
In figure：Signal receiving module 1, mechanically or electrically road fault diagnosis module 2, leakage failure diagnostic module 3, signal output
Module 4, engine speed sensor 5, gas rail pressure sensor 6, nozzle open and-shut mode detection means 7.
Embodiment
The present invention is further detailed explanation with embodiment for explanation below in conjunction with the accompanying drawings.
Referring to Fig. 1, a kind of diesel oil ignited formula engine gas Nozzle failures diagnostic equipment is provided with signal in the diagnostic equipment
Receiving module 1, mechanically or electrically road fault diagnosis module 2, signal output module 4, the input and hair of the signal receiving module 1
Motivation speed probe 5, gas rail pressure sensor 6, nozzle open and-shut mode detection means 7 are electrically connected, the output of signal receiving module 1
End is electrically connected by mechanically or electrically road fault diagnosis module 2 and the input of signal output module 4.
Be additionally provided with leakage failure diagnostic module 3 in the diagnostic equipment, the input of the leakage failure diagnostic module 3 with
The output end of signal receiving module 1 is electrically connected, the output end of leakage failure diagnostic module 3 and the input electricity of signal output module 4
Even.
A kind of diagnostic method of diesel oil ignited formula engine gas Nozzle failures diagnostic equipment, including mechanically or electrically road failure is examined
Disconnected method；
The mechanically or electrically road method for diagnosing faults refers to：Under engine idling condition, the signal receiving module 1 connects in real time
Receive from engine speed sensor 5, gas rail pressure sensor 6, nozzle open and-shut mode detection means 7 detection signal, and will
It is sent to mechanically or electrically road fault diagnosis module 2, then opens a certain nozzle, and is closed other nozzles, then
Detection signal progress comparing calculation before and after mechanically or electrically road fault diagnosis module 2 opens the nozzle received, and according to
Result of calculation diagnosis nozzle whether there is mechanically or electrically road failure, finally sends diagnostic result to signal output module 4.
In the mechanically or electrically road method for diagnosing faults, it is according to result of calculation diagnosis nozzle whether there is mechanically or electrically road failure
Refer to：
If it is unchanged to calculate nozzle open and-shut mode before and after delivery nozzle is opened, engine speed, gas rail pressure power, circuit is diagnosed as
Failure；
If calculating nozzle open and-shut mode before and after delivery nozzle is opened to change, the gentle rail pressure power of engine speed is unchanged, then diagnoses
For mechanical breakdown；
If calculating nozzle open and-shut mode before and after delivery nozzle is opened to change, engine speed rises, and gas rail pressure power declines, then diagnoses
For without machinery or fault.
The fault diagnosis module 2 also includes leakage failure diagnostic module 3, the input of the leakage failure diagnostic module 3
End is electrically connected with signal receiving module 1, and output end and the signal output module 4 of leakage failure diagnostic module 3 are electrically connected；
The diagnostic method also includes leakage method for diagnosing faults；
The leakage method for diagnosing faults refers to：Under engine idling condition, the real-time reception of signal receiving module 1 comes from
Engine speed sensor 5, gas rail pressure sensor 6, the detection signal of nozzle open and-shut mode detection means 7 are simultaneously sent it to
Leakage failure diagnostic module 3, subsequent leakage failure diagnostic module 3 is examined according to the detection signal contrast in the time T received
Disconnected nozzle whether there is leakage failure, and diagnostic result is sent to signal output module 4.
In the leakage method for diagnosing faults, whether there is according to the detection signal contrast diagnosis nozzle in the time T received
Leakage failure refers to：
If it is unchanged to calculate delivery nozzle open and-shut mode, engine speed rises, and gas rail pressure power declines, then is diagnosed as internal leakage event
Barrier；
If calculating delivery nozzle open and-shut mode and engine speed are unchanged, and gas rail pressure power declines, then is diagnosed as external leakage event
Barrier；
If it is unchanged to calculate delivery nozzle open and-shut mode, engine speed, gas rail pressure power, it is diagnosed as without leakage failure.
The principle of the present invention is described as follows：
When gas nozzle has mechanical breakdown（Such as jet is blocked）Or during leakage failure, can only often be connect by pulling out nozzle
Plug-in unit judges whether nozzle works, and the gas nozzle of diesel oil ignited formula engine is single point injection, and in the idling state
Nozzle does not work, it is impossible to pull out the means of nozzle insert to detect the state of nozzle with tradition.Therefore, the invention provides a kind of bavin
Oily pilot ignition gas nozzle failure diagnostic apparatus and its diagnostic method, the design is by investigating engine speed, gas simultaneously
The change of these three parameters of rail pressure power and nozzle open and-shut mode is next effectively to judge whether nozzle has circuit, machinery or leakage event
Barrier.
Embodiment 1：
Referring to Fig. 1, a kind of diesel oil ignited formula engine gas Nozzle failures diagnostic equipment is provided with signal reception in the diagnostic equipment
Module 1, mechanically or electrically road fault diagnosis module 2, leakage failure diagnostic module 3, signal output module 4, the signal receive mould
The input of block 1 is electrically connected with engine speed sensor 5, gas rail pressure sensor 6, nozzle open and-shut mode detection means 7, signal
Output one end of receiving module 1 is electrically connected by mechanically or electrically road fault diagnosis module 2 and the input of signal output module 4, letter
The end of output two of number receiving module 1 is electrically connected by leakage failure diagnostic module 3 and the input of signal output module 4.
A kind of diagnostic method of diesel oil ignited formula engine gas Nozzle failures diagnostic equipment, including mechanically or electrically road failure is examined
Disconnected method, leakage method for diagnosing faults；
The mechanically or electrically road method for diagnosing faults is：Under engine idling condition, the real-time reception of signal receiving module 1
From engine speed sensor 5, gas rail pressure sensor 6, nozzle open and-shut mode detection means 7 detection signal（Engine
Rotating speed is 700rpm, and gas rail pressure power is 520Kpa, and nozzle is closed）, and send it to mechanically or electrically road failure and examine
Disconnected module 2, then open a certain nozzle, be closed other seven nozzles, and injecting time is set as 10ms, then
Detection signal after mechanically or electrically road fault diagnosis module 2 opens the nozzle received（Engine speed is 716rpm, gas
Rail pressure power is 505Kpa, and nozzle is in opening）With the detection signal before opening（Engine speed is 700rpm, gas rail pressure
Power is 520Kpa, and nozzle is closed）Comparing calculation is carried out, it is found that engine speed rises 16rpm, gas rail pressure power is
15Kpa is have dropped, nozzle is changed into opening from closed mode, therefore diagnoses the nozzle normal work, no machinery or circuit event
Barrier, finally sends the diagnostic result to signal output module 4.
It is described leakage method for diagnosing faults be：Under engine idling condition, the real-time reception of signal receiving module 1 comes
From engine speed sensor 5, gas rail pressure sensor 6, the detection signal of nozzle open and-shut mode detection means 7 and it is sent to
To leakage failure diagnostic module 3, subsequent leakage failure diagnostic module 3 is drawn according to the detection signal contrast in the 10ms received
Nozzle open and-shut mode and engine speed are unchanged, and gas rail pressure power declines, therefore are diagnosed as external leakage failure, finally should
Diagnostic result is sent to signal output module 4.
Embodiment 2：
Step embodiment 1, difference is：
In the mechanically or electrically road method for diagnosing faults, the mechanically or electrically calculating of road fault diagnosis module 2 obtains nozzle and opens front and rear
Nozzle open and-shut mode, engine speed, gas rail pressure power are unchanged, are diagnosed as fault.
In the leakage method for diagnosing faults, leakage failure diagnostic module 3 calculates delivery nozzle open and-shut mode, engine and turned
Speed, gas rail pressure power are unchanged, are diagnosed as without leakage failure.
Embodiment 3：
Step embodiment 1, difference is：
In the mechanically or electrically road method for diagnosing faults, the mechanically or electrically calculating of road fault diagnosis module 2 obtains nozzle and opens front and rear
Nozzle open and-shut mode is changed, and the gentle rail pressure power of engine speed is unchanged, is diagnosed as mechanical breakdown.
In the leakage method for diagnosing faults, the calculating delivery nozzle open and-shut mode of leakage failure diagnostic module 3 is unchanged, starts
Machine rotating speed rises, and gas rail pressure power declines, and is diagnosed as internal leakage failure.
Claims (6)
1. a kind of diesel oil ignited formula engine gas Nozzle failures diagnostic equipment, it is characterised in that：
Signal receiving module is provided with the diagnostic equipment（1）, mechanically or electrically road fault diagnosis module（2）, signal output module
（4）, the signal receiving module（1）Input and engine speed sensor（5）, gas rail pressure sensor（6）, nozzle opens
Closed state detection means（7）It is electrically connected, signal receiving module（1）Output end pass through mechanically or electrically road fault diagnosis module（2）With
Signal output module（4）Input be electrically connected.
2. a kind of diesel oil ignited formula engine gas Nozzle failures diagnostic equipment according to claim 1, it is characterised in that：Institute
State and leakage failure diagnostic module is additionally provided with diagnostic equipment（3）, the leakage failure diagnostic module（3）Input connect with signal
Receive module（1）Output end be electrically connected, leakage failure diagnostic module（3）Output end and signal output module（4）Input electricity
Even.
3. a kind of diagnostic method of the diesel oil ignited formula engine gas Nozzle failures diagnostic equipment described in claim 1, its feature
It is：
The diagnostic method includes mechanically or electrically road method for diagnosing faults；
The mechanically or electrically road method for diagnosing faults refers to：Under engine idling condition, the signal receiving module（1）In real time
Receive and come from engine speed sensor（5）, gas rail pressure sensor（6）, nozzle open and-shut mode detection means（7）Detection letter
Number, and send it to mechanically or electrically road fault diagnosis module（2）, then a certain nozzle is opened, and other nozzles is in closing
State, then mechanically or electrically road fault diagnosis module（2）Detection signal before and after the nozzle received is opened is contrasted
Calculate, and diagnose nozzle whether there is mechanically or electrically road failure according to result of calculation, finally send diagnostic result to signal output mould
Block（4）.
4. a kind of diagnostic method of diesel oil ignited formula engine gas Nozzle failures diagnostic equipment according to claim 3, its
It is characterised by：
In the mechanically or electrically road method for diagnosing faults, refer to according to result of calculation diagnosis nozzle whether there is mechanically or electrically road failure：
If it is unchanged to calculate nozzle open and-shut mode before and after delivery nozzle is opened, engine speed, gas rail pressure power, circuit is diagnosed as
Failure；
If calculating nozzle open and-shut mode before and after delivery nozzle is opened to change, the gentle rail pressure power of engine speed is unchanged, then diagnoses
For mechanical breakdown；
If calculating nozzle open and-shut mode before and after delivery nozzle is opened to change, engine speed rises, and gas rail pressure power declines, then diagnoses
For without machinery or fault.
5. a kind of diagnostic method of diesel oil ignited formula engine gas Nozzle failures diagnostic equipment according to claim 3, its
It is characterised by：
The fault diagnosis module（2）Also include leakage failure diagnostic module（3）, the leakage failure diagnostic module（3）It is defeated
Enter end and signal receiving module（1）It is electrically connected, leakage failure diagnostic module（3）Output end and signal output module（4）It is electrically connected；
The diagnostic method also includes leakage method for diagnosing faults；
The leakage method for diagnosing faults refers to：Under engine idling condition, the signal receiving module（1）Real-time reception comes
From engine speed sensor（5）, gas rail pressure sensor（6）, nozzle open and-shut mode detection means（7）Detection signal and will
It is sent to leakage failure diagnostic module（3）, subsequent leakage failure diagnostic module（3）According to the detection in the time T received
Signal contrast diagnosis nozzle whether there is leakage failure, and diagnostic result is sent to signal output module（4）.
6. a kind of diagnostic method of diesel oil ignited formula engine gas Nozzle failures diagnostic equipment according to claim 5, its
It is characterised by：
In the leakage method for diagnosing faults, No leakage is had according to the detection signal contrast diagnosis nozzle in the time T received
Failure refers to：
If it is unchanged to calculate delivery nozzle open and-shut mode, engine speed rises, and gas rail pressure power declines, then is diagnosed as internal leakage event
Barrier；
If calculating delivery nozzle open and-shut mode and engine speed are unchanged, and gas rail pressure power declines, then is diagnosed as external leakage event
Barrier；
If it is unchanged to calculate delivery nozzle open and-shut mode, engine speed, gas rail pressure power, it is diagnosed as without leakage failure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710241007.6A CN106988945B (en) | 2017-04-13 | 2017-04-13 | Fault diagnosis instrument and method for gas nozzle of diesel ignition type engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710241007.6A CN106988945B (en) | 2017-04-13 | 2017-04-13 | Fault diagnosis instrument and method for gas nozzle of diesel ignition type engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106988945A true CN106988945A (en) | 2017-07-28 |
| CN106988945B CN106988945B (en) | 2023-02-28 |
Family
ID=59415972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710241007.6A Active CN106988945B (en) | 2017-04-13 | 2017-04-13 | Fault diagnosis instrument and method for gas nozzle of diesel ignition type engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106988945B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112283000A (en) * | 2020-10-29 | 2021-01-29 | 潍柴动力股份有限公司 | Method and device for detecting internal leakage of fuel gas injection valve of engine |
| CN112943429A (en) * | 2021-02-05 | 2021-06-11 | 广西玉柴机器股份有限公司 | Engine aftertreatment HC injection system diagnosis method capable of avoiding air influence |
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| CN206636684U (en) * | 2017-04-13 | 2017-11-14 | 东风商用车有限公司 | Fault diagnosis instrument for gas nozzle of diesel ignition engine |
-
2017
- 2017-04-13 CN CN201710241007.6A patent/CN106988945B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06264803A (en) * | 1993-03-11 | 1994-09-20 | Toyota Motor Corp | Abnormality diagnostic device of fuel injection device |
| WO2011073175A1 (en) * | 2009-12-14 | 2011-06-23 | Spheretech International | Diagnostic method for a diesel engine |
| JP2011153610A (en) * | 2010-01-28 | 2011-08-11 | Toyota Motor Corp | Injection abnormality detection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112283000A (en) * | 2020-10-29 | 2021-01-29 | 潍柴动力股份有限公司 | Method and device for detecting internal leakage of fuel gas injection valve of engine |
| CN112943429A (en) * | 2021-02-05 | 2021-06-11 | 广西玉柴机器股份有限公司 | Engine aftertreatment HC injection system diagnosis method capable of avoiding air influence |
| CN112943429B (en) * | 2021-02-05 | 2022-03-11 | 广西玉柴机器股份有限公司 | Engine aftertreatment HC injection system diagnosis method capable of avoiding air influence |
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| Publication number | Publication date |
|---|---|
| CN106988945B (en) | 2023-02-28 |
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