CN101375025A - Onboard diagnostics for anomalous cylinder behavior - Google Patents
Onboard diagnostics for anomalous cylinder behavior Download PDFInfo
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- CN101375025A CN101375025A CN 200680052934 CN200680052934A CN101375025A CN 101375025 A CN101375025 A CN 101375025A CN 200680052934 CN200680052934 CN 200680052934 CN 200680052934 A CN200680052934 A CN 200680052934A CN 101375025 A CN101375025 A CN 101375025A
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Abstract
Method and system of onboard diagnostics in engine emissions monitoring, particularly for detecting anomalous cylinder behavior. In some embodiments, at least one sensor in the exhaust path measures electric charge that is indicative of particulate matter. In some embodiments, at least one sensor measures oxides of nitrogen. The .indications of instantaneous emissions can be used to effect real-time adjustments in engine control, and can be logged for maintenance purposes.
Description
The present invention requires the U.S. Provisional Application No.60/753 in submission on December 21st, 2005, the preference of 091 the applying date, and this patent application is attached to herein by reference.The present invention is directed in part under the DE-FC04-02AL67636 and is supported and the work of execution by government.
Background technique
Emission regulation worldwide emphasizes to reduce the fine particle discharging.The fine grained and the related stronger of influence of being harmful to health than large particle, and motor is fine grain main source.In fact, the rapid increase of the number of the change that in engine technology, reduces the mass particle discharging fine particle that caused being discharged (too little and do not constitute too big quality).The diameter range of nuclear mode (nuclei mode) particle is in the 5-50 nanometer.They are made up of the mixture of sulfuric acid and partially combusted fuel and lubricant oil.Great majority nuclear mode particle just forms when exhaust combustion products is diluted in atmosphere and cooled off, and the vapor precursor that examine the mode particle this moment is more prone to experience the conversion of gas to particle.
In order to satisfy following emission standard, following diesel engine will be assembled complicated combustion control system probably, and assemble the after-treatment system that comprises particulate filter and catcher probably.Effectively the exhaust particulate sensor can provide information to help reduce particulate emission from motor, and makes that therefore catcher and other after-treatment device are more feasible.Grain catcher may be less or may be not too often upgraded, thereby has reduced the expense and the fine of fuel economy aspect.
Also need to reduce the nitrogen oxide in the engine emission.Yet the particulate matter that reduces as everyone knows in the engine exhaust may cause more nitrogen oxide, and vice versa.Therefore, balance must be made, and optimum will be helped to obtain about the more information of the composition of engine exhaust.
The whole total discharging of long-term trend of existing engine emission sensors monitor overall engine emissions (1-10 second endurance) or fixing test circuit.Yet in many motors, one or two cylinder causes most of discharging, and these peak values surpass emission standard.By the test that the applicant made illustrate between cylinder and the cylinder and circulation with circulate between sizable actual change of engine emission.This phenomenon is covered when being averaged on all cylinders.
Therefore, the present invention uses sensor to monitor the characteristic or the engine cycles characteristic of single cylinder instantaneously, so that measure the adaptability based on the current and following emission regulation of " being no more than " limit rather than average level.Also can be used for engine control or maintenance from the information that sensor obtained.Can write down the information that obtains from sensor during normal service cycle, using, and also can be used for changing engine parameter and reduce higher emissions from the fault cylinder.
Description of drawings
Member in the accompanying drawings may not proportionally be drawn.
Fig. 1 is the example illustration that the basic building block of particulate matter sensors is shown.
Fig. 2 is the side view of the sensor of Fig. 1.
Fig. 3 is that the sensor of Fig. 1 is inserted into the example illustration in the outlet pipe.
Fig. 4 is the example illustration that vehicle-mounted (onboard) diagnosis is used for the system of engine emission monitoring, its expression sensor position in engine exhaust passage.
Fig. 5 is the plotted curve that shows from the laboratory data of test engine.
The diagram of the particle concentration that Fig. 6 is during normal to be produced.
Fig. 7 be during the power operation when a cylinder breaks down the diagram of particle concentration.
Fig. 8 is the diagram of the charge sensor signal during power operation when a cylinder breaks down.
Fig. 9 a and Fig. 9 b are the examples of diagnostic flow chart.
Figure 10 is the diagram from the difference of the signal of two charge sensors on the both sides that lay respectively at diesel particulate filter.
Figure 11 is the diagram at the charge sensor signal in diesel particulate filter downstream.
Embodiment
Though the present invention allows various forms of embodiments, but it is shown in the drawings and described some embodiment hereinafter, will be appreciated that present disclosure is considered to example of the present invention and is not intended to limit the invention to specific embodiment represented and that describe.
As an embodiment's example, sensor can be monitored the electric charge on particulate matter during the exhaust stroke of cylinder.Different charge sensors are known in the art.For example, some is the contact charge sensor, and some is the image charge sensor, and this image charge sensor can be measured the electric charge of the particle in the blast air that passes through, and with whether feeler is irrelevant.Some is an ion transducer.The example that is used for the sensor of the electric charge on monitor particles thing during the exhaust stroke of cylinder is described hereinafter.Description of Related Art is in U.S. Patent No. 6,971, and in 258, it is attached to herein by reference.Because electric charge is pure electrical phenomena, so the speed of response is very high and can monitor discharging in real time.Can realize cylinder and circuit monitoring one by one one by one.
As an embodiment's example, the charge sensor utilization has high-temperature metal ring, dish or the net of glass or ceramic electrical feed, so that the electricity isolation to the signal of institute's sensing to be provided.Read electronic circuit and measure ionization, electric charge or current delivery, and such as other parameter of temperature.
As an example, charge sensor can be positioned on the automobile spark plug.This method provides extraordinary high temperature and high pressure platform, and it can be easy to be placed in the engine exhaust passage, such as directly in engine exhaust pipe, manifold or collector.If motor has turbosupercharger, then sensor can be placed on the downstream of turbosupercharger.This design also meets low-cost extensive the manufacturing.Can provide signal electronics by commercial laboratory level charge amplifier.
In the example of Fig. 1 to Fig. 3, sensor 10 can use Swageloc
Accessory 12 and/or refractory ceramics feedthrough insulator 12 and/or connector.The probe 14 of sensor 10 can place the exhaust passage of motor.The length 15 of probe 14 and diameter 16 can be based on parameter sensing and engine parameters and are changed.
Improvement problem is that the flue dust and the operation under high-temperature very that accumulate on the sensor probe will make the direct shorted to earth of signal.Yet active element is by extremely thin non-conductive coatings passivation, the short circuit that there is not dust layer in its explanation and is caused.Therefore, sensor probe response does not reduce because of soot build-up and high temperature.In the example of Fig. 1 to Fig. 3, probe 14 is by extremely thin non-conductive coatings or layer 17 passivation (as shown in Figure 2), the electric short circuit that its explanation does not exist the dust layer of being accumulated owing to probe 14 to cause during power operation.
An embodiment of sensor 10 can be standard spark plug 11, and this standard spark plug 11 has the outer electrode that is removed and has 4 to 6 inches stainless steel extension part 14, and this extension part 14 has about 1/8 inch diameter and is soldered on the centre electrode.Sensor 10 can be installed in the blast air 23.Fig. 3 is illustrated in the example of sensor installation 10 in the outlet pipe 18.Can there be the stainless steel collar 24 that is welded in the outlet pipe 18.The collar 24 can be formed into and have oversize threaded coupling, so that can easily utilize other sensor 10 with different probe type to replace sensor 10.
In test, come the root-mean-square value (rms) of calculating sensor signal by recorded data in a plurality of continuous engine cycles, and make it with relevant from the measured value of Bosch smoke meter, diffusion charger, photoelectricity aerosol sensor and flocculated particle counter.In the rms of charge sensor value and be low to moderate between the Bosch smoke intensity of about 0.1 Bosch number and have extraordinary correlation.
The sensor that is used to measure nitrogen oxide is known in the art.This sensor also can be arranged on the spark plug and be installed on engine exhaust passage.
Fig. 4 is the example illustration that On-Board Diagnostics (OBD) is used for the system of engine emission monitoring, the example of its position of expression sensor in engine exhaust passage.Be used to measure particulate matter sensor 31,32 and 33 and the sensor 35 that is used for measuring nitrogen oxide be installed on outlet pipe 37 from motor 39.Also show exhaust gas recirculation 41 and diesel particulate filter 43.Except producing sensor signal, this system need have data-handling capacity, with in real time from signal extraction information.Therefore, signal processing electronic device 45 receives and the amplification sensor signal, and provides input to control unit of engine 47.Control unit of engine 47 is connected to motor 39, and this motor 39 comprises that its fuel sprays and inlet manifold system.Except signal from the sensor in the exhaust passage, control unit of engine 47 also can receive the signal about engine parameter, the character of these engine parameters such as fuel flow rate, exhaust gas recirculation, injection timing, needle lift, crankshaft angles, cylinder pressure, valve location and lift, mainfold vacuum degree, fuel/air mixture, engine charge etc.Percentage, valve that control unit of engine 47 can provide control signal to adjust fuel mixture, injection timing, exhaust gas recirculation are controlled or the like.These descriptions are the devices that are used for obtaining the information of the improper discharging (improper discharging comprise particulate matter, nitrogen oxide or the two) about engine exhaust passage, be used to make this information device relevant with the discharging of single cylinder, and the example (example as mentioned below) that is used to reduce the device (its all in real time) of the discharging of the particulate matter of single cylinder or nitrogen oxide.
Can finish about Millisecond greatly from the particulate matter of cylinder exhaust and the quick sensing of nitrogen oxide, and the information that changes between cylinder and the cylinder can be provided in real time.This information can disclose the fault cylinder, and can disclose the exhaust dynamics of motor under different condition.Diagnostic software can use this information, be used for using with record cylinder data in the periodicity maintenance period, to change single cylinder initial conditions so that revise single inblock cylinder gaseity, and with when surpassing predeterminated level from the improper discharging of cylinder such as sending warning signal to user instrument panel.This has described and has been used for following the tracks of engine emission in time and is used to provide the example of improper engine emission concentration above the device of the real-time indication of predeterminated level.
Fig. 5 is the plotted curve that shows from the laboratory data of test engine, the example of the diagnostic message that its expression can be always derived from this sensing of engine exhaust.Plotted curve has been described voltage and has been relation between time of unit with the second.Signal 51 and 52 is averaged on 11 engine cycles to eliminate the influence of parasitic noise.The pressure transducer of signal 51 from a cylinder of test engine detects.Line 54 is indicated the cycle of an engine cycles of determining from signal 51.The charge sensor that the position class of signal 52 from the exhaust passage is similar to the sensor 31 among Fig. 4 detects.When detecting minimum particulate matter, produce the high relatively point in the signal 52, and when detecting maximum particulate matter, produce the relative low spot in the signal 52.To at about 0.043 second relative low spot peak-to-peak reading being shown, its reflection is indicated as line 56 from the particulate matter of a cylinder discharging at about 0.036 second high relatively point.Significantly significantly different peak-to-peak readings signify is from the great changes of the discharging of difference cylinder in signal 52.In addition, the notable change in time of the peak-to-peak reading of specific cylinder also is the important diagnostic index.
Principle is shown among Fig. 6 to Fig. 8.Fig. 6 and Fig. 7 are illustrated respectively in during the normal and the example of the particle concentration that produced when a cylinder breaks down during power operation.When normal engine operation, will be approximately identical from the exhaust particle concentrations of each cylinder, as shown in Figure 6.If a cylinder in these cylinders goes wrong, then the particulate matter from this specific cylinder may increase, as shown in Figure 7.Fig. 8 represents the example such as the signal of the charge sensor that is similar to the sensor 31 among Fig. 4 from position class.Fig. 8 represents to show under the situation that has the fault cylinder example of particulate matter anomalous signals during power operation.By this abnormal signal configuration, recorded data, it will provide Useful Information to adopt during scheduled maintenance.In addition, the operation that can revise the fault cylinder when power operation is to keep in repair as temporary transient the adjustment until can being scheduled to.For example, can revise cylinder operation by other parameter (such as fuel mixture or injection timing) of adjusting exhaust gas recirculation 41 or controlled by control unit of engine 47.Therefore, the information that sensor extracted from the exhaust passage is can be in real time relevant with particle concentration from single cylinder.
As indicated above, also need to reduce the nitrogen oxide in the engine exhaust, but the concentration that reduces particulate matter may cause more nitrogen oxide, vice versa.Can take different ways to control discharging.The On-Board Diagnostics (OBD) information that sensor that can be from engine exhaust passage obtains will help to optimize emission control.
Fig. 9 a and Fig. 9 b represent an example of diagnostic flow chart.Keep monitoring (61) by control unit of engine 47 from the signal of charge sensor 31 and NOx sensor 35.Record is from sensor 31 and 35 and from the data (62) of control unit of engine 47.Control unit of engine 47 detects (63) nitrous oxides concentration and whether surpasses preset limit.If they surpass preset limit, then whether control unit of engine 47 detection (64) particulate matter signal exist unusually.If exist this unusually, then make unusual timing relevant with definite (65) this unusual cylinder that is belonged to other engine parameter.Inquire that then (66) are to detect the difference that whether has initial conditions for determined cylinder.If there is this species diversity, then will adjust (67) to them until there not being this species diversity.Continue to detect (68) particulate matter signal whether still illustrate the definite cylinder of institute unusually.If do not illustrate unusually, it is unusual until no longer detecting then to adjust (69) cylinder initial conditions.If control unit of engine 47 detects (63) nitrous oxides concentration and is no more than predeterminated level, then exist with the correlation of other engine parameter and determine the cylinder that nitrogen oxide belonged to that (65a) is excessive.Then, inquire that (66a) is to detect the difference whether determined cylinder exists initial conditions.If there is this species diversity, then can adjust (67a) to them until there not being this species diversity.Continue to detect (68a) nitrogen oxide and whether continue to surpass predeterminated level.If they surpass predeterminated level, then adjust cylinder initial conditions (69a) and no longer surpass predeterminated level until nitrogen oxide.Fig. 9 a and Fig. 9 b are an example of adoptable diagnostic flow chart.
Usually, adjustable initial conditions can comprise fuel mixture or injection timing, to reduce the higher emissions from the fault cylinder.The adjustable initial conditions that may have other for example may be for controlling such as percent of exhaust gas recirculation or valve.
As an example of emission control strategy, may adjust engine timing to reduce nitrogen oxide and to use filter to reduce particulate matter.The particulate matter of measuring the upstream and downstream of diesel particulate filter is another example of the diagnostic message that can derive by the sensing from engine exhaust.In the example of Fig. 4, in the exhaust passage, there is diesel particulate filter 43.In the operation period of motor 39, diesel particulate filter 43 will be written into and must upgrade behind certain amount of time.Fig. 4 represents to lay respectively at the charge sensor 32 and 33 of the upstream and downstream of diesel particulate filter 43.Can monitor and write down signal I respectively from sensor 32 and 33
1And I
2Two signal I
1And I
2Difference will increase and along with the time reduces along with the load of diesel particulate filter 43.This situation is shown among Figure 10, and it is I
1-I
2Diagram along with the time.If this difference becomes less than certain predeterminated level 71, then it may be indicated and upgrade diesel particulate filter 43.Control unit of engine 47 also can be programmed to be used for when this situation takes place such as sending warning signal to user instrument panel.This has described and has been used to detect the example that should when upgrade the device of diesel particulate filter.
Figure 11 is I
2Diagram along with the time.If I
2Suddenly be higher than certain predeterminated level 73, this indication diesel particulate filter 43 may be penetrated.This indicated number that diesel particulate filter lost efficacy need be keeped in repair to change filter.Control unit of engine 47 can be programmed to be used for when surpassing level 73 such as sending warning signal to user instrument panel.This has described the example of device of the degradation in efficiency of the diesel particulate filter that is used for judging engine exhaust passage.
Described by preamble, what it should be noted that is can carry out various modifications and variations under the situation of true spirit that does not depart from novel concept of the present invention and scope.Will be appreciated that, do not expect or infer about shown in or the restriction of described specific embodiment.
Claims (33)
1. one kind is used for the onboard diagnostic system that monitoring engine discharges, and described system comprises:
At least one sensor;
Data processing system;
In described at least one sensor each is configured to and is set at the exhaust passage that is used for being positioned over motor aspect size;
Described data processing system is suitable in real time from described at least one sensor information extraction;
In described at least one sensor each is selected from charge sensor and is used to detect the sensor of nitrogen oxide;
Wherein, if in described at least one sensor is a charge sensor, then the information extracted of the described sensor from described at least one sensor can be relevant with the particle concentration from the single cylinder of described motor.
2. onboard diagnostic system according to claim 1 is characterized in that, described data processing system comprises the signal processing electronic device of the signal that is used to amplify described at least one sensor.
3. onboard diagnostic system according to claim 1 is characterized in that, described onboard diagnostic system also comprises:
One in described at least one sensor is the sensor that is used to detect nitrogen oxide;
When the signal that described data processing system is suitable for detecting the described sensor that is used to detect nitrogen oxide surpasses predeterminated level.
4. onboard diagnostic system according to claim 1 is characterized in that, described onboard diagnostic system also comprises:
One in described at least one sensor is charge sensor;
Described data processing system comprises control unit of engine, is used for detecting the information of extracting from a described sensor of described at least one sensor and whether has unusually and be used for determining the described cylinder that is belonged to unusually.
5. onboard diagnostic system according to claim 1, it is characterized in that, described data processing system is suitable for extracting the information of expression engine parameter, and described engine parameter is selected from: fuel flow rate, percent of exhaust gas recirculation, injection timing, needle lift, crankshaft angles, cylinder pressure, valve location, valve lift, mainfold vacuum degree, fuel/air mixture and engine charge character.
6. onboard diagnostic system according to claim 1 is characterized in that described data processing system comprises control unit of engine, is used for transmitting control signal to adjust at least one engine parameter in real time in response to the information of described extraction.
7. onboard diagnostic system according to claim 1, it is characterized in that described data processing system is suitable for transmitting control signal and is selected from least one engine parameter of following group with adjustment: fuel mixture, injection timing, percent of exhaust gas recirculation and valve control.
8. onboard diagnostic system according to claim 1 is characterized in that, described onboard diagnostic system also comprises the database that is used to write down the data of indicating described single cylinder performance.
9. onboard diagnostic system according to claim 1 is characterized in that, the signal that described data processing system is suitable for a sensor in described at least one sensor sends warning signal when surpassing predeterminated level.
10. onboard diagnostic system according to claim 1 is characterized in that, described onboard diagnostic system also comprises:
First sensor in described at least one sensor is a charge sensor;
Second sensor in described at least one sensor is a charge sensor;
When second sensor that is arranged in the upstream of diesel particulate filter of described exhaust passage and described at least one sensor when the first sensor in described at least one sensor was positioned at the downstream of described diesel particulate filter, described data processing system was suitable for sending when difference between the corresponding signal of the first sensor of described at least one sensor and second sensor is lower than predeterminated level warning signal.
11. a method that is used for the monitoring engine discharging, described method comprises:
Monitor the signal of the charge sensor of the exhaust passage that is arranged in motor;
Whether the signal that detects described charge sensor occurs unusually;
If detect described unusually, then determine the cylinder of the described described motor that is belonged to unusually;
If detect described unusually, it is described unusual until no longer detecting then to adjust at least one engine parameter in real time.
12. method according to claim 11 is characterized in that, described determining step comprises:
Receive the signal of the selected engine parameter of expression;
Make described unusual timing relevant with described selected engine parameter.
13. method according to claim 11 is characterized in that, described method also comprises:
Receive at least one signal of expression cylinder initial conditions;
Whether the initial conditions that uses described cylinder initial conditions signal to detect the described described definite cylinder that is belonged to unusually is different from the initial conditions of other cylinder;
If the initial conditions of described definite cylinder is different from the initial conditions of described other cylinder, then adjust at least one parameter in described at least one engine parameter no longer is different from described other cylinder until the initial conditions of described definite cylinder initial conditions;
Adjusting described at least one engine parameter after the initial conditions of described definite cylinder no longer is different from the initial conditions of described other cylinder, whether detection still takes place described unusual.
14. method according to claim 11, it is characterized in that, described method comprises that also described engine condition is selected from: fuel flow rate, percent of exhaust gas recirculation, injection timing, needle lift, crankshaft angles, cylinder pressure, valve location, valve lift, mainfold vacuum degree, fuel/air mixture and engine charge character from the signal extraction information of expression engine condition.
15. method according to claim 11 is characterized in that, described at least one engine parameter is selected from: fuel mixture, injection timing, waste gas circulation percentage and valve control.
16. method according to claim 11 is characterized in that, described method also comprises the data of the single cylinder performance of the described motor of record indication.
17. method according to claim 11 is characterized in that, described method also comprises:
Monitoring is arranged in the signal of sensor that is used to detect nitrogen oxide of described exhaust passage;
Detect nitrous oxides concentration and whether surpass predeterminated level.
18. method according to claim 17 is characterized in that, described method also comprises:
If described concentration surpasses described preset limit, then adjust at least one engine parameter in real time and no longer surpass described preset limit until described concentration.
19. a method that is used for the monitoring engine discharging, described method comprises:
Monitoring is arranged in the signal of sensor that is used to detect nitrogen oxide of the exhaust passage of motor;
Whether the concentration that detects nitrogen oxide surpasses predeterminated level;
If described nitrous oxides concentration surpasses described predeterminated level, then determine the cylinder of the excessive described motor that nitrogen oxide belonged to;
If described concentration surpasses described predeterminated level, then adjust at least one engine parameter in real time and no longer be detected as above described preset limit until described concentration.
20. method according to claim 19 is characterized in that, described method also comprises:
Receive at least one signal of expression cylinder initial conditions;
Whether the initial conditions that uses described cylinder initial conditions signal to detect described definite cylinder that described excessive concentration belongs to is different from the initial conditions of other cylinder;
If the initial conditions of described definite cylinder is different from the initial conditions of described other cylinder, then adjust at least one parameter in described at least one engine parameter no longer is different from described other cylinder until the initial conditions of described definite cylinder initial conditions;
Adjusting described at least one engine parameter after the initial conditions of described definite cylinder no longer is different from the initial conditions of described other cylinder, detecting described concentration and whether still surpass described predeterminated level.
21. method according to claim 19 is characterized in that, described method also comprises:
Monitoring is arranged in the signal of the charge sensor of described exhaust passage;
Whether the signal that detects described charge sensor takes place unusually;
If detect described unusually, then determine the cylinder of the described described motor that is belonged to unusually;
If detect described unusually, at least one parameter of then adjusting in real time in described at least one engine parameter is described unusual until no longer detecting.
22. method according to claim 21 is characterized in that, described method also comprises:
Receive at least one signal of expression cylinder initial conditions;
Whether the initial conditions that uses described cylinder initial conditions signal to detect the described described definite cylinder that is belonged to unusually is different from the initial conditions of other cylinder;
If the initial conditions of the described described definite cylinder that is unusually belonged to is different from the initial conditions of described other cylinder, then adjust at least one parameter in described at least one engine parameter no longer is different from described other cylinder until the initial conditions of the described described definite cylinder that is belonged to unusually initial conditions;
After the initial conditions of the described described definite cylinder that is belonged to unusually no longer was different from the initial conditions of described other cylinder, whether detection still took place described unusual at described at least one engine parameter of adjustment.
23. method according to claim 19, it is characterized in that, described method comprises that also described engine condition is selected from: fuel flow rate, percent of exhaust gas recirculation, injection timing, needle lift, crankshaft angles, cylinder pressure, valve location, valve lift, mainfold vacuum degree, fuel/air mixture and engine charge character from the signal extraction information of expression engine condition.
24. method according to claim 19 is characterized in that, described at least one engine parameter is selected from: fuel mixture, injection timing, percent of exhaust gas recirculation and valve control.
25. method according to claim 19 is characterized in that, described method also comprises the data of the single cylinder performance of the described motor of record indication.
26. method according to claim 19 is characterized in that, described method also comprises transmission warning signal when the signal of described sensor surpasses predeterminated level.
27. a method that is used for the monitoring engine discharging, described method comprises:
Monitoring in real time is arranged in the signal of charge sensor of diesel particulate filter upstream of the exhaust passage of motor;
Monitoring in real time is positioned at the signal of the charge sensor in described diesel particulate filter downstream.
28. method according to claim 27 is characterized in that, the signal that described method also is included in described downstream sensor sends warning signal when surpassing predeterminated level.
29. method according to claim 27 is characterized in that, described method also comprises:
Whether the difference of detection between the corresponding signal of described upstream sensor and described downstream sensor is lower than predeterminated level;
When being lower than described predeterminated level, the difference between the corresponding signal of described upstream sensor and described downstream sensor sends warning signal.
30. an onboard diagnostic system that is used for the monitoring engine discharging, described system comprises:
Be used for obtaining in real time the device of the information relevant with the improper engine emission of the exhaust passage of motor, described improper engine emission comprises at least a in particulate matter and the nitrogen oxide;
Be used for making in real time the described improper engine emission information device relevant with the discharging of the single cylinder of described motor;
Be used for reducing in real time the device of improper engine emission of the single cylinder of described motor.
31. onboard diagnostic system according to claim 30 is characterized in that, described onboard diagnostic system also comprises and is used to provide improper engine emission concentration to surpass the device of the real-time indication of predeterminated level.
32. onboard diagnostic system according to claim 30 is characterized in that, described onboard diagnostic system also comprises the device that is used for following the tracks of in time improper engine emission.
33. onboard diagnostic system according to claim 30, it is characterized in that, described onboard diagnostic system also comprises the device that is used for determining being selected from least one condition of following group: upgrade the time of the diesel particulate filter of described exhaust passage, and the degradation in efficiency of the diesel particulate filter in the described exhaust passage.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US75309105P | 2005-12-21 | 2005-12-21 | |
| US60/753,091 | 2005-12-21 | ||
| US11/612,183 | 2006-12-18 |
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| CN101375025A true CN101375025A (en) | 2009-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200680052934 Pending CN101375025A (en) | 2005-12-21 | 2006-12-19 | Onboard diagnostics for anomalous cylinder behavior |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564700A (en) * | 2011-12-30 | 2012-07-11 | 潍柴动力股份有限公司 | Detection method and control system for detecting tightness of engine air cylinder as well as engine system |
| CN113530675A (en) * | 2020-04-16 | 2021-10-22 | 中国船舶重工集团公司第七一一研究所 | Diesel engine maintenance support method and system and computer storage medium |
-
2006
- 2006-12-19 CN CN 200680052934 patent/CN101375025A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564700A (en) * | 2011-12-30 | 2012-07-11 | 潍柴动力股份有限公司 | Detection method and control system for detecting tightness of engine air cylinder as well as engine system |
| CN102564700B (en) * | 2011-12-30 | 2015-03-11 | 潍柴动力股份有限公司 | Detection method and control system for detecting tightness of engine air cylinder as well as engine system |
| CN113530675A (en) * | 2020-04-16 | 2021-10-22 | 中国船舶重工集团公司第七一一研究所 | Diesel engine maintenance support method and system and computer storage medium |
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