CN200986496Y - Device for detecting fault of discharge gas door - Google Patents
Device for detecting fault of discharge gas door Download PDFInfo
- Publication number
- CN200986496Y CN200986496Y CN 200620112285 CN200620112285U CN200986496Y CN 200986496 Y CN200986496 Y CN 200986496Y CN 200620112285 CN200620112285 CN 200620112285 CN 200620112285 U CN200620112285 U CN 200620112285U CN 200986496 Y CN200986496 Y CN 200986496Y
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- Prior art keywords
- signal
- engine
- waste gate
- electronic controller
- fuel oil
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- 239000000295 fuel oil Substances 0.000 claims abstract description 24
- 239000012530 fluid Substances 0.000 claims abstract description 6
- 239000002699 waste material Substances 0.000 claims description 32
- 239000002826 coolant Substances 0.000 claims description 16
- 239000000446 fuel Substances 0.000 claims description 13
- 230000004044 response Effects 0.000 claims description 6
- 239000003921 oil Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000002912 waste gas Substances 0.000 description 31
- 230000009467 reduction Effects 0.000 description 9
- 230000006870 function Effects 0.000 description 8
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 230000006837 decompression Effects 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000003434 inspiratory effect Effects 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
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Abstract
The utility model discloses a device to detect exhaust air port fault and then adjust inlet air pressure in the general motor air inlet pipe. The motor is provided with a turbocharger with an exhaust air port. The device includes an electric controller, a fuel oil conveying device connected with the electric controller and a pressure sensor connected with the electric controller and interlocked with the motor fluid suction tunnel. The pressure sensor responds to the pressure of the fluid suction tunnel and generates an inlet air pressure signal. When the responded fluctuation value is larger than a preset value, the electric controller generate a first fuel oil conveying command as the function of the first fuel oil conveying curve, and generate a second fuel oil conveying command as the function of the second fuel oil conveying curve. Besides, the electric controller saves the inlet air pressure signal at a preset time interval, and identifies the fluctuation value in accordance with the saved inlet air pressure signal.
Description
(1) technical field
The utility model relates generally to automatically controlled turbosupercharged engine, relates in particular to a kind of electronic controller that is used to realize waste gate (wastegate) fault detect and constant engine value reduction strategy.
(2) background technology
Turbosupercharged engine is well known in the art.Turbosupercharger can comprise the turbine wheel of an intercalation in the engine exhaust road.With the turbine mechanical connection be the compressor impeller that is arranged in the engine suction passage.As known in the art, engine exhaust makes turbine wheel spins and compressor impeller is compressed the air in the engine suction passage.By air is compressed, the air capacity that can introduce cylinder increases, and can spray into more fuel oil thus, so, just the power output of engine is brought up on the engine of normal operation.
In some cases, the compression meeting to air causes too big voltage rise or can cause too big pressure in cylinder in the inlet manifold.In these cases, if allow turbosupercharger to turn round without restriction, engine can be destroyed.Tend to install a waste gate to prevent that pressure from surpassing one and the level that engine damages may occur.
Waste gate both had been connected also with suction passage usually and had been connected with exhaust duct.When the pressure in the suction passage during near the level that may cause engine to damage, waste gate is opened a valve in the engine exhaust pipeline, and this valve impels waste gas to walk around the turbine wheel of turbosupercharger.And this so reduce the speed of turbine, reduced the force of compression that turbocharger compressor applied thus.So, waste gate helps to guarantee that turbosupercharger can not produce destructive inlet manifold's pressure.
Yet if waste gas decompression exhaust valve breaks down, the bypass around the turbocharger turbine impeller is closed, and stops waste gas to walk around turbine wheel from bypass.So, if waste gate breaks down, then turbocharger compressor can continue pressurized air, surpasses the stress level that may cause engine to damage.
Known in the state of the art have other waste gate control system.For example, U.S. Pat 5,121,604 have disclosed a kind of closed-loop control of waste gate, and this control is attempted to regulate inlet manifold's pressure according to a kind of predetermined corresponding relation, and this corresponding relation is the function of engine speed and other parameter.This patent has been inquired into the safety feature of taking precautions against apparatus failure.For example, be provided with a switch, this switch starts when servo loops breaks down.By starting this switch, controller is sent a just fix command value of the function of engine speed.Like this, inlet manifold's pressure remains on may cause engine to damage below horizontal.Yet ' 604 patents do not disclose any safety feature of protecting engine when waste gas decompression exhaust valve itself breaks down.
The utility model overcomes the defective of previous waste gas decompression exhaust valve and waste gate controller.These and other advantage of the present utility model promptly can be understood after reaching claims in conjunction with the accompanying drawings to have read instructions.
(3) utility model content
The purpose of this utility model is to provide a kind of waste gate failure detector, and this device can be used for determining when that fault has appearred in the exhausting waste gas reduction valve, and protects the safety of engine when waste gas decompression exhaust valve breaks down.
Aspect one of the present utility model, a kind of device that is used to detect the waste gate fault, this device is also regulated the admission pressure (boost pressure) in the engine intake manifold, described engine is equipped with the turbosupercharger with a waste gate, described device comprises: an electronic controller, one is connected in the oil fuel handling plant of this electronic controller, an and pressure transducer that is connected to this electronic controller and is associated with the engine fluid suction passage, wherein, this pressure transducer produces an admission pressure signal in response to the pressure in this fluid suction passage.Greater than a predetermined value, this electronic controller produces the function of first fuel delivery domination as the first fuel delivery curve, and produces the function of the second fuel delivery order as the second fuel delivery curve in response to undulating quantity.In addition, this electronic controller is stored this admission pressure signal on schedule at interval, and wherein this electronic controller is determined undulating quantity based on the admission pressure signal of this storage.
The device that is used to detect the waste gate fault of the present utility model can be used to determine when that fault has appearred in the exhausting waste gas reduction valve.The utility model is compared admission pressure fluctuation value with the predetermined fluctuation limit.When surpassing the predetermined fluctuation limit, admission pressure fluctuation value indicates exhausting waste gas reduction valve fault.In response, electronic control module reduces engine output, the admission pressure that reduces engine thus and produced.Therefore, the utility model can be protected the safety of engine when waste gas decompression exhaust valve breaks down.
These and others of the present utility model are read after describing in detail soon clear reaching claims in conjunction with the accompanying drawings.
(4) description of drawings
Fig. 1 has shown an embodiment of the utility model waste gate controller with the form of structural drawing; With
Fig. 2 has shown the software control flow chart of an embodiment of the utility model waste gate controller.
(5) embodiment
At first with reference to Fig. 1, what this figure showed is the structural drawing of a kind of better embodiment of the utility model waste gate controller 10.Exhausting waste gas operation valve 15 is connected between the inlet of the exhaust main 20 of explosive motor 25 and exhaust silencer 30.Exhausting waste gas operation valve 15 also is connected to the inlet of aftercooler 70 in the inlet channel of engine 25.As shown in the figure, exhausting waste gas reduction valve 15 form one with parallel exhaust passage, the exhaust passage of passing turbosupercharger 30 (A).More specifically, the exhaust passage (A) of passing through turbosupercharger generally comprises a pressure turbine impeller 35 and low-pressure turbine impeller 40.Waste gas flows out turbosupercharger 30 and flows to sound suppressor 30 by low pressure exhaust outlet 45.
The pressurized air that flows out low pressure compressor impeller 50 is subjected to the compression of high pressure compressor impeller 55 subsequently.Though better embodiment comprises a turbosupercharger that two turbine wheels and two compressor impellers are arranged, be that people know in the art with the turbosupercharger of single turbine and impeller.The exhausting waste gas controller that the utility model defines in claims prolongs and relates to the application of this type of turbosupercharger.
Aftercooler 70 is connected to the delivery outlet of high pressure compressor impeller 55, and is connected to the inlet manifold 75 of engine 25.The single cylinder 80 of engine 25 is shown in Fig. 1.Yet engine 25 can comprise the cylinder 80 of arbitrary number.Cylinder comprises at least one gas admittance valve 85 and at least one vent valve 90.Drive dominant signal in response to receiving thrower from thrower driving circuit 100 through connector 105, fuel injector 95 sprays into cylinder 80 to fuel oil.Driving circuit 100 produces as electronic control module (ECM) 110 and drives order through the thrower of the function of the fuel oil command signal of connector 115 transmission.After air-fuel oil mixture was detonated, waste gas flowed out cylinder 80 and enters exhaust cylinder 20 through vent valve 90.
ECM 110 is connected on the coolant temperature sensor 120 by connector 130.Coolant temperature sensor 120 is preferably mounted in the coolant flowing path of engine 25 and produces coolant temperature signal on connector 130.Engine speed sensor 135 is connected in the camshaft of engine 25 and produces engine speed signal on the connector 140 that is connected to ECM 110.In a better embodiment, ECM 110 inside comprise a storer 145.
Air inlet pressure sensor 111 is associated with inlet manifold 75 and produces the admission pressure signal, and this signal is the function of the air pressure in the inlet manifold 75.Inspiratory pressure sensor 111 is connected to ECM 110 by connector 112.ECM 110 reads the admission pressure signal through connector 112.
As shown in Figure 1, exhausting waste gas valve 15 preferably is connected between the outlet of exhaust main 20 and high pressure turbocharger compressor impeller 55.The exhausting waste gas reduction valve comprises housing 175 and barrier film 180 according to usual manner, and the latter is being connected to housing 175 near its periphery place.Valve 195 and spring 185 are connected in barrier film 180.Spring 185 biases to close stance with valve 195, and valve closing exhaust gas bypass opening 200 is walked around pressure turbine impeller 35 and low-pressure turbine impeller 40 to prevent exhaust gas bypass at this moment.Dividing plate 190 is fixed within the housing 175 so that at the housing 175 inner chambers that form two separation.For example, housing 175 comprises chamber 205 and the waste gas chamber 210 of boosting that enter the mouth.The inlet chamber 205 of boosting is communicated with the outlet of high pressure compressor impeller 55.The pressure that flows out the air of high pressure compressor impeller 55 makes barrier film 180 overcome spring 185 downward bias forces and mobile valve 195.For example, if air pressure enough makes barrier film 180 compression springs 185, then valve 195 will move to and open wide the position, make flow through waste gas chamber 210 and flow to sound suppressor 30 by discharge bypass opening 200 of waste gas thus.Like this, when admission pressure surpasses the determined predetermined value of bias force by spring, the exhausting waste gas reduction valve will open wide, and the waste gas from pressure turbine pressure 35 and low-pressure turbine pressure 40 is turned to.This so reduce compressor pressure 50,55 power that produced, and reduce the admission pressure among the inlet manifold 75.If waste gate helps to prevent from engine is produced the sort of infringement that allows the too high intake air pressure of turbosupercharger generation promptly can cause thus.
Referring now to Fig. 2, this figure shows is the block diagram of software control used in the utility model better embodiment.Use any suitable microprocessor and assembly language associated therewith, can be from Fig. 2 software of encoding handyly.According to process flow diagram shown in Figure 2 this type of software of encoding is a step as the machinery to those skilled in the art.
When supposing to start first after engine is being made completion, exhausting waste gas reduction valve 15 will correctly turn round.After having started engine, exhausting waste gas controller of the present utility model will begin to be special-purpose admission pressure fault value of specific engine measuring.This admission pressure fault value is different because of engine, because the tolerance between the engine etc. have tiny difference.It is the admission pressure fault value that each engine is selected a customization that the utility model allows ECM.
At piece 300, the software control of the utility model better embodiment begins.At piece 310, counter reset is 0, and software control enters piece 320.
At piece 320, ECM 110 reads the coolant temperature signal on the conduit 130, and this signal is that coolant temperature sensor 120 produces.ECM 110 will be worth with predetermined coolant temperature value and compare.In a better embodiment, although also can easily use other value, Yu Ding coolant temperature value is about 85 degrees centigrade here.Should be scheduled to coolant temperature value if coolant temperature signal surpasses, then software control enters piece 330.Otherwise piece 320 is returned in software control.
At piece 330, ECM 110 estimates the present engine load as the function of the fuel oil dominant signal on the connector 115.ECM accomplishes this point by this fuel oil command signal 115 is compared with a fuel oil bid value of being scheduled to.In a better embodiment, this predetermined fuel oil bid value is corresponding to about 95% of full fuel oil bid value.If the fuel oil order surpasses predetermined fuel oil bid value, then software control enters piece 340.Otherwise piece 320 is returned in software control.
At piece 340, ECM 110 reads the engine speed signal that is produced by engine speed sensor 135 on conduit 140.ECM is this engine that signal is compared with the first and second preset engine speed.In a better embodiment, this first and second preset engine speed corresponds respectively to the speed of about 1600RPM and about 1700RPM.When engine speed signal during corresponding to velocity amplitude between the first preset engine velocity amplitude and the second preset engine velocity amplitude, software control enters piece 350.Otherwise piece 320 is returned in software control.
At piece 350, ECM calculates from the last back time of being pass by of admission pressure sampling and the time of being pass by and compares with a predetermined amount of time T1.In a better embodiment, this predetermined amount of time is about 30 minutes kinds.Yet, can be worth with other easily and replace, and can not break away from the spirit and scope of the present utility model that appended claims limits.If the time of being pass by surpasses predetermined amount of time, then software control enters piece 360.Otherwise piece 320 is returned in software control.
At piece 360, ECM 110 reads the admission pressure signal and reading is stored in the storer 145.The admission pressure signal is produced on conduit 112 by air inlet pressure sensor 111.Software control enters piece 370 from piece 360 then.
At piece 370, ECM 110 determines whether to have got 10 pressure of inspiration(Pi) values and stores in the storer.In a better embodiment, desirable 10 readings.Yet, can change the number of reading easily, and can not break away from the spirit and scope of the present utility model that appended claims limits.If got 10 admission pressure values, then software control enters piece 380.Otherwise software control enters piece 390.At piece 390, counter (n) increases certainly, and control enters piece 320.
At piece 380, determine admission pressure fluctuation value based on these 10 admission pressure values.Admission pressure fluctuation value can be for example determined by calculating maximal value in these 10 admission pressure values and the difference between the minimum value, perhaps, perhaps further determine by the difference of calculating between admission pressure maximal value and the admission pressure mean value by calculating the indivedual fluctuations between each of this 10 admission pressure values and determining that the mean value of these 10 fluctuations determines.Then, software control enters piece 395.At piece 395, ECM 110 compares undulating quantity with a predetermined fluctuation limit, and this limit can be based on for example one or more engine parameters-as speed, cooling medium characteristic, fuel characteristic-determine.If admission pressure fluctuation value is greater than the predetermined fluctuation limit, i.e. expression is boosted excessively.Then software control enters piece 396, and 80% of normal value is reduced in the fuel oil domination that ECM 110 is sent in piece 396.On the other hand, if admission pressure fluctuation value less than the predetermined fluctuation limit, then piece 310 is returned in software control, at piece 310 place's counter resets to 0, so that can get 10 admission pressure values again.From process flow diagram as seen, need only admission pressure fluctuation value less than the predetermined fluctuation limit, ECM 110 will read the admission pressure value repeatedly and do the comparison shown in the piece 395.
Though ECM 110 has reduced 20% to engine capacity output in better embodiment, this quantity can be adjusted into other value easily, and can not break away from the spirit and scope of the present utility model that appended claims limits.
The condition illustration of in 350, listing at piece 320 service condition of engine when producing higher admission pressure value.Calculating the predetermined fluctuation limit that engine will be created in admission pressure value higher in the admissible range of operation corresponding to when is good.Like this, this predetermined fluctuation limit will be corresponding to the highest admission pressure that can allow in the admission pressure value range of operation.The waste gate fail-safe control just not too can be indicated the waste gate fault and reduce engine capacity when in fact engine runs on the admissible admission pressure.After having calculated admission pressure fluctuation value, ECM 110 subsequently by measure admission pressure fluctuation value, should value compare with the predetermined fluctuation limit and definite this actual value (admission pressure fluctuation value) whether the value of overstepping the extreme limit (the predetermined fluctuation limit) determines that the exhausting waste gas reduction valve is to break down.
Several concrete proposals values have been proposed for listed engine operating parameter in piece 320 to 350.Yet, depending on concrete engine or concrete the application, these parameters can change and can not break away from the spirit and scope of the present utility model that appended claims limits.Pointed as preamble, should be selected so that engine is operated on the higher admission pressure level in the admissible range of operation these parameter values.
In some cases, may preferably calculate the predetermined fluctuation limit of the concrete service condition that a reflection changes at any time.For example, in-engine admission pressure can be along with sea level elevation or extreme changes of temperature and is changed.In these cases, preferably can change this predetermined fluctuation limit to adapt to the system of these variations.
Present embodiment allows ECM to measure the admission pressure signal constantly when not finding mistake so that calculate admission pressure fluctuation value.Like this, the waste gate fault detector of present embodiment can be regulated admission pressure fluctuation value to solve the gradual change problem in temperature, height above sea level, air pressure or other condition.
Industrial applicibility
The utility model can be used for determining when that fault has appearred in the exhausting waste gas pressure-reducing valve. Work as exhausting waste gas When pressure-reducing valve broke down, it tended to close and originally can make waste gas discharge engine and no longer be rotated further The bypass channel of the turbine wheel of turbocharger. Waste gas may make the air of suction continue to press so Contracting, it is excessive and damage the possibility of engine to have produced thus the air inlet impeller.
The utility model is compared admission pressure fluctuation value with the predetermined fluctuation limit. Work as intake pressure wave When surpassing the predetermined fluctuation limit, moving value indicates exhausting waste gas pressure-reducing valve fault. As response, the electronics control The molding piece reduces engine output, reduces thus the admission pressure that engine produces.
Claims (10)
1. device that is used to detect the waste gate fault, this device is also regulated the admission pressure in the engine intake manifold, and described engine is equipped with the turbosupercharger with a waste gate, and described device comprises:
One electronic controller;
One oil fuel handling plant, this oil fuel handling plant is connected in described electronic controller;
One pressure transducer, this pressure transducer are connected to described electronic controller and are associated with described engine fluid suction passage, and wherein, described pressure transducer produces an admission pressure signal in response to the pressure in the described fluid suction passage;
Wherein, when undulating quantity during greater than a predetermined value, described electronic controller responds and produces the first fuel delivery order as the function of the first fuel delivery curve, and produces the second fuel delivery order as the function of the second fuel delivery curve; And
Wherein, described electronic controller is stored described admission pressure signal on schedule at interval, and described electronic controller is determined described undulating quantity based on described storage admission pressure signal.
2. the device that is used to detect the waste gate fault as claimed in claim 1 is characterized in that, described undulating quantity is based on the nearest admission pressure signal of predetermined number and determine.
3. the device that is used to detect the waste gate fault as claimed in claim 2 is characterized in that, described undulating quantity is corresponding to the admission pressure fluctuation mean value of the nearest admission pressure signal of described predetermined number.
4. the device that is used to detect the waste gate fault as claimed in claim 1 is characterized in that, this device comprises:
One engine speed sensor that is connected with described electronic controller, described engine speed sensor produces an engine speed signal;
One coolant temperature sensor that is connected with described electronic controller, described coolant temperature sensor produces coolant temperature signal;
With the timing device that described electronic controller is connected, described timing device produces one and has crossed the time signal;
Wherein, an expectation of described electronic controller output fuel oil command signal, surpass a predetermined coolant temperature value, described expectation fuel oil dominant signal and surpass a predetermined fuel oil predominant value and described timing device and produced one and spent the time during signal, admission pressure signal of described electronic controller input when described engine speed signal surpasses a preset engine velocity amplitude, described coolant temperature signal.
5. the device that is used to detect the waste gate fault as claimed in claim 4 is characterized in that, described timing device gap periods ground on schedule produces the described time signal of having crossed.
6. the device that is used to detect the waste gate fault as claimed in claim 5 is characterized in that, described predetermined time interval was above about 30 minutes.
7. the device that is used to detect the waste gate fault as claimed in claim 4 is characterized in that, described preset engine velocity amplitude is about 1600RPM.
8. the device that is used to detect the waste gate fault as claimed in claim 4 is characterized in that, described predetermined fuel oil bid value is about 95% of full fuel oil bid value.
9. the device that is used to detect the waste gate fault as claimed in claim 4 is characterized in that, described predetermined temperature value is about 85 ℃.
10. the device that is used to detect the waste gate fault as claimed in claim 4, it is characterized in that, described timing device gap periods ground on schedule produces the described time signal of having crossed, wherein said predetermined time interval was above about 30 minutes, described preset engine velocity amplitude is about 1600RPM, described predetermined fuel oil bid value is the about 95% of full fuel oil bid value, and described predetermined temperature value is about 85 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620112285 CN200986496Y (en) | 2006-05-30 | 2006-05-30 | Device for detecting fault of discharge gas door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620112285 CN200986496Y (en) | 2006-05-30 | 2006-05-30 | Device for detecting fault of discharge gas door |
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| Publication Number | Publication Date |
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| CN200986496Y true CN200986496Y (en) | 2007-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620112285 Expired - Lifetime CN200986496Y (en) | 2006-05-30 | 2006-05-30 | Device for detecting fault of discharge gas door |
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| CN (1) | CN200986496Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106536896A (en) * | 2014-07-02 | 2017-03-22 | 赛峰飞机发动机公司 | Method for detecting a valve failure in a turboshaft engine |
| CN107782560A (en) * | 2017-11-20 | 2018-03-09 | 潍柴动力股份有限公司 | A kind of bypass type booster fault detection method and device |
| CN109870307A (en) * | 2017-12-05 | 2019-06-11 | 福特全球技术公司 | System and method for turbine wastegate diagnosis |
| CN113448318A (en) * | 2021-07-07 | 2021-09-28 | 江铃汽车股份有限公司 | Vehicle offline fault diagnosis control method |
-
2006
- 2006-05-30 CN CN 200620112285 patent/CN200986496Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106536896A (en) * | 2014-07-02 | 2017-03-22 | 赛峰飞机发动机公司 | Method for detecting a valve failure in a turboshaft engine |
| CN106536896B (en) * | 2014-07-02 | 2018-08-28 | 赛峰飞机发动机公司 | The method for detecting the failure of the valve in turboaxle motor |
| CN107782560A (en) * | 2017-11-20 | 2018-03-09 | 潍柴动力股份有限公司 | A kind of bypass type booster fault detection method and device |
| CN109870307A (en) * | 2017-12-05 | 2019-06-11 | 福特全球技术公司 | System and method for turbine wastegate diagnosis |
| CN113448318A (en) * | 2021-07-07 | 2021-09-28 | 江铃汽车股份有限公司 | Vehicle offline fault diagnosis control method |
| CN113448318B (en) * | 2021-07-07 | 2022-08-16 | 江铃汽车股份有限公司 | Vehicle offline fault diagnosis control method |
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| CX01 | Expiry of patent term |
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| EXPY | Termination of patent right or utility model |