CN104100341A - DPF (Diesel Particulate Filter) self-diagnosis device, self-diagnosis method and engine tail gas treatment system - Google Patents
DPF (Diesel Particulate Filter) self-diagnosis device, self-diagnosis method and engine tail gas treatment system Download PDFInfo
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- CN104100341A CN104100341A CN201410307161.5A CN201410307161A CN104100341A CN 104100341 A CN104100341 A CN 104100341A CN 201410307161 A CN201410307161 A CN 201410307161A CN 104100341 A CN104100341 A CN 104100341A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
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Abstract
The invention provides a DPF (Diesel Particulate Filter) self-diagnosis device. A DPF is arranged in an engine tail gas system. The DPF self-diagnosis device comprises a sensor which is used for detecting DPF parameters, and a DPF fault analysis unit which is independently arranged, wherein the sensor is connected with the fault analysis unit, and the fault analysis unit is used for analyzing a DPF fault according to the detected DPF parameters. According to the DPF self-diagnosis device and a diagnosis method, whether the DPF has the fault or not can be judged according to a signal of the sensor, so that the fault diagnosis efficiency is improved, and the vehicle body performance is prompted. In addition, the DPF self-diagnosis device is arranged outside an ECU (Electronic Control Unit), does not need to be independently developed by an engine manufacturer, and can be provided by a third party, the standards are uniform, and the maintenance is facilitated. The invention also provides an engine tail gas treatment system and a DPF self-diagnosis method.
Description
Technical field
The present invention relates to technical field of engines, particularly a kind of DPF self-diagnosis system, self-diagnosing method, and engines tail gas processing system.
Background technique
Based on environmental requirement, the Abgasgesetz increasingly stringent of Vehicular exhaust.Engines tail gas processing system comprises DOC and DPF, and DOC is connected in waste pipe, and DPF is connected on DOC, and tail gas is discharge after DOC and DPF processing successively.
DOC (Diesel Oxidation Catalyst) is diesel oil oxidation catalyst converter, is mainly used in the composition such as HC, CO, NO in oxidized tail gas, meanwhile, can improve engine exhaust temperature;
DPF (Diesel Particulate Filter) is diesel particulate filter.
Dpf regeneration is the process of the clearance of particles such as the soot in DPF device being fallen to ensure the normal work of DPF.
Can DPF, as the important component part of engine exhaust gas processing unit, run well most important.At present, there is no the DPF Fail detecting apparatus of special setting, affect car body performance and maintenance speed.
In view of this, how providing a kind of DPF Fail detecting apparatus, improve fault diagnosis efficiency, then promote car body performance, is those skilled in the art's technical problems urgently to be resolved hurrily.
Summary of the invention
Object of the present invention is for a kind of DPF self-diagnosis system, self-diagnosing method are provided, and engines tail gas processing system.This DPF self-diagnosis system can improve fault diagnosis efficiency, promotes car body performance.
DPF self-diagnosis system provided by the invention, DPF is located in motor exhaust system, described DPF self-diagnosis system comprises the sensor that detects DPF parameter, and be independent of the trouble analysis unit of DPF that Engine ECU arranges, described sensor is connected with described trouble analysis unit, and DPF fault is analyzed according to the DPF parameter detecting in described trouble analysis unit.
DPF self-diagnosis system provided by the invention and diagnostic method, can judge that according to sensor signal whether DPF is in fault, thereby improve fault diagnosis efficiency, promotes car body performance.In addition, this DPF self-diagnosis system is separately located at outside ECU, develops separately without manufacturers of engines, can be provided by third party, and standard is unified, is convenient to maintenance.
Preferably, described sensor comprises the temperature transducer that detects temperature parameter before DPF, and described trouble analysis unit prestores regeneration temperature calibration value and regeneration nominal time interval time of DPF; The front temperature that described in described trouble analysis unit judges, temperature transducer detects is less than described regeneration temperature calibration value and endurance while exceeding regeneration calibration value interval time, is diagnosed as the fault of not regenerating for a long time.
Preferably, described sensor comprises the temperature transducer that detects temperature parameter before DPF, the calibration value and the number of times calibration value of reproductive success number of times working time that described trouble analysis unit prestores reproductive success time calibrating value, motor working time; Described trouble analysis unit judges, in working time calibration value, when reproductive success number of times is greater than number of times calibration value, is diagnosed as the frequent fault of regeneration;
Wherein, the front temperature that described temperature transducer detects is greater than described regeneration temperature calibration value and endurance while reaching described reproductive success time calibrating value, and reproductive success once.
Preferably, described sensor comprises the pressure transducer that detects DPF front and back pressure parameter; Described trouble analysis unit prestores the first pressure reduction calibration value and the first pressure reduction retention time of pressure reduction before and after described DPF; The pressure that described trouble analysis unit detects according to described pressure transducer, judge that DPF front and back pressure reduction is in the first pressure reduction calibration value, and while exceeding for the first pressure reduction retention time, is diagnosed as DPF fault is not installed.
Preferably, described sensor comprises the pressure transducer that detects DPF front and back pressure parameter and the temperature transducer that detects the front temperature parameter of DPF; The prestore regeneration temperature calibration value of described DPF of described trouble analysis unit, and the second pressure reduction calibration value of front and back pressure reduction, the second pressure reduction retention time; When the front temperature that described temperature transducer detects is greater than regeneration temperature calibration value, the pressure that described trouble analysis unit detects according to described pressure transducer, judge before and after DPF that pressure reduction is less than the second pressure reduction calibration value, and the endurance reached for the second pressure reduction retention time, be diagnosed as DPF leakage failure.
Preferably, described sensor comprises the temperature transducer that detects temperature parameter after DPF, and the prestore rear scale of thermometer definite value of DPF of described trouble analysis unit, when the rear temperature that described trouble analysis unit judges detects exceedes calibration value, is diagnosed as DPF overheating fault.
Preferably, also comprise warning piece, when described DPF self-diagnosis system diagnosis is out of order, output signal to described warning piece, with output alarm signal.
Preferably, described warning piece is arranged at the afterbody of vehicle.
Preferably, also comprise ECU output terminal, to export the signal that obtains and the diagnostic result ECU to motor.
The present invention also provides a kind of engines tail gas processing system, comprises the DOC and the DPF that join, and described DOC is connected with engine exhaust end, it is characterized in that, also comprises the DPF self-diagnosis system as described in above-mentioned any one.
This engines tail gas processing system has above-mentioned self-diagnosis system, has the technique effect same with above-mentioned self-diagnosis system.
Preferably, described sensor comprises the temperature transducer that detects temperature parameter after DPF, and when the rear temperature of detection exceedes calibration value, the ECU of motor interrupts described DPF.
The present invention also provides a kind of DPF self-diagnosing method, and DPF is located in motor exhaust system, it is characterized in that,
Be independent of the trouble analysis unit that Engine ECU arranges DPF;
Detect DPF parameter;
Analyze DPF fault by trouble analysis unit according to the DPF parameter detecting.
This self-diagnosing method has the technique effect same with above-mentioned DPF self-diagnosis system.
Preferably, comprise the steps:
The regeneration temperature calibration value of DPF and calibration value interval time of regenerating prestore;
The parameter that detects DPF comprises the front temperature of DPF;
The front temperature that judgement detects is less than regeneration temperature calibration value and endurance while reaching regeneration calibration value interval time, is diagnosed as the fault of not regenerating for a long time.
Preferably,
The calibration value and the number of times calibration value of reproductive success number of times working time of regeneration temperature calibration value, reproductive success time calibrating value, motor working time of DPF prestores;
The parameter that detects DPF comprises the front temperature of DPF;
The reproductive success number of times of statistics in working time calibration value;
Judge when reproductive success number of times is greater than number of times calibration value, be diagnosed as the frequent fault of regeneration;
Wherein, the front temperature of detection is greater than described regeneration temperature calibration value and endurance while reaching described reproductive success time calibrating value, and reproductive success once.
Preferably,
The first pressure reduction calibration value and the first pressure reduction retention time of pressure reduction before and after DPF prestore;
The parameter that detects DPF comprises DPF front and back pressure;
Judge before and after DPF that pressure reduction is in the first pressure reduction calibration value, and while exceeding for the first pressure reduction retention time, be diagnosed as DPF fault is not installed.
Preferably,
The second pressure reduction calibration value and the second pressure reduction retention time of pressure reduction before and after DPF prestore;
The parameter that detects DPF comprises front temperature and the DPF front and back pressure of DPF;
When temperature is greater than regeneration temperature calibration value before DPF, judges that the maximum value of DPF front and back pressure reduction is less than the second pressure reduction calibration value, and exceeded for the second pressure reduction retention time, be diagnosed as DPF leakage failure.
Preferably,
Scale of thermometer definite value after DPF prestores;
The parameter that detects DPF comprises the rear temperature of DPF;
When the rear temperature that judgement detects is greater than rear scale of thermometer definite value, be diagnosed as DPF overheating fault.
Brief description of the drawings
Fig. 1 is the structural representation of a kind of embodiment of engines tail gas processing system provided by the present invention;
Fig. 2 is DPF self-diagnosing method the first embodiment's provided by the present invention flow chart;
Fig. 3 is DPF self-diagnosing method the second embodiment's provided by the present invention flow chart;
Fig. 4 is DPF self-diagnosing method the 3rd embodiment's provided by the present invention flow chart;
Fig. 5 is DPF self-diagnosing method the 4th embodiment's provided by the present invention flow chart.
In Fig. 1:
10 motors, 101ECU, 20DOC, 30DPF, 40DPF self-diagnosis system, 401 temperature transducers, 402 pressure transducers, 403 signaling lamps
Embodiment
In order to make those skilled in the art understand better technological scheme of the present invention, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 1, Fig. 1 is the structural representation of a kind of embodiment of engines tail gas processing system provided by the present invention; Fig. 2 is DPF self-diagnosing method the first embodiment's provided by the present invention flow chart.
Motor 10 exhaust treatment systems in this embodiment comprise DOC20, DPF30 and DPF self-diagnosis system 40, and motor 10 outlet pipes and DOC20, DPF30 join successively.Wherein, DPF self-diagnosis system 40, comprise the sensor that detects DPF30 parameter, and be independent of the trouble analysis unit of DPF30 that Engine ECU (Electronic Control Unit, electronic control unit) arranges, sensor is connected with trouble analysis unit, and DPF30 fault is analyzed according to the DPF30 parameter detecting in trouble analysis unit.
Particularly, sensor comprises the temperature transducer 401 that detects the front temperature of DPF30, and for detection of the temperature parameter of DPF30, temperature transducer 401 can be arranged at the front end of DPF30, in the pipeline between DOC20 and DPF30.Temperature transducer 401 is connected with trouble analysis unit, and in Fig. 1, temperature transducer 401 transmits temperature signal to trouble analysis unit by wire harness.
Now, trouble analysis unit can prestore DPF30 regeneration temperature calibration value and regeneration interval time calibration value; The front temperature that trouble analysis unit judges temperature transducer 401 detects is less than regeneration temperature calibration value and endurance while exceeding regeneration calibration value interval time, is diagnosed as the fault of not regenerating for a long time.In the time that before DPF30, temperature exceedes certain value, DPF30 just can carry out normal clearance of particles work, can be made as 550 DEG C, and certainly, according to concrete DPF30, regeneration temperature calibration value can adjust.
Said apparatus specifically can be according to the following step fault diagnosis of not regenerating for a long time:
The regeneration temperature calibration value of S11, the DPF30 that prestores and regeneration calibration value interval time;
The front temperature of S12, detection DPF30;
S13, judge detect front temperature whether be less than regeneration temperature calibration value; Be, enter step S14, no, return to S12;
Whether the endurance that S14, judgement are less than regeneration temperature calibration value exceedes regeneration calibration value interval time, is, enters step S15, no, returns to step S12;
S15, be diagnosed as the fault of not regenerating for a long time.
The endurance that front temperature is less than regeneration temperature calibration value is the interval time of regenerating.According to the running state of motor 10, can store interval time regeneration.In motor 10 runnings, do not exceed calibration value interval time if regenerate, but continue certain hour, now motor 10 cuts out, after reopening, if still in regeneration interval state, the endurance in step S14 should with regeneration stack interval time of record before, with reaction regeneration more realistically interval time.As shown in Figure 2, whether power on and judge motor 10 running statees according to motor 10ECU.
S111, beginning;
S121, judge whether ECU just powers on, and is, enters step S131, no, enter step S181;
S131, read regeneration interval time;
S141, judge detect front temperature whether be less than regeneration temperature calibration value; Be, enter step S151, no, enter step S161;
S151, judge regeneration interval time whether be greater than regeneration interval time calibration value, be, enter step S171, no, enter step S181;
S161, regeneration are reset to zero, and enter step S151 interval times;
S171, be diagnosed as the fault of not regenerating for a long time, enter step S192;
S181, judge whether lower electricity of ECU, no, return to step S141, be to enter step S191;
S191, store regenerated interval time, enter step S192;
S192, end.
DPF self-diagnosis system 40 can deposit regeneration in EEPROM (Electrically Erasable Read Only Memory, the storage chip that after a kind of power down, data are not lost) interval time, obtains for trouble analysis unit.DPF self-diagnosis system can arrange EEPROM, in the time that DPF is connected with the ECU101 of motor 10, also data can be stored in the EEPROM of ECU, following relate to storage data equally according to which, repeat no more.
Further, the frequent fault of regeneration can also be diagnosed in the trouble analysis unit of DPF self-diagnosis system 40.As follows:
The calibration value and the number of times calibration value of reproductive success number of times working time of regeneration temperature calibration value, reproductive success time calibrating value, motor working time of DPF prestores;
The parameter that detects DPF comprises the front temperature of DPF;
The reproductive success number of times of statistics in working time calibration value;
Judge when reproductive success number of times is greater than number of times calibration value, be diagnosed as the frequent fault of regeneration;
Wherein, the front temperature of detection is greater than described regeneration temperature calibration value and endurance while reaching described reproductive success time calibrating value, and reproductive success once.
Particularly, please refer to Fig. 3, Fig. 3 is DPF self-diagnosing method the second embodiment's provided by the present invention flow chart.
Said apparatus specifically can be according to the following step frequent fault diagnosis of regenerating:
S21, beginning;
S22, judge whether ECU just powers on, and is, enters step S23, no, enter step S24;
S23, read reproductive success number of times and 10 working times of motor;
S24, judge before DPF30 whether temperature is greater than regeneration temperature calibration value, and the endurance reach reproductive success time calibrating value, be, enter step S25, no, enter step S26;
S25, regeneration times add one, enter step S26;
S26, judge whether motor is greater than calibration value working time 10 working times, is, enters step S29, no, enter step S27;
Whether S27, reproductive success number of times are greater than number of times calibration value, are, enter step S28, no, enter step S210;
S28, be diagnosed as regeneration frequent fault, enter S212;
S29,10 working times of motor and the zero clearing of reproductive success number of times, enter S210;
S210, judge whether lower electricity of ECU, be, enter step S211, no, return to step S24;
S211, store regenerated number of success and 10 working times of motor;
S212, end.
The diagnostic mode of the frequent fault of this regeneration, the fault embodiment that do not regenerate for a long time as above-mentioned, also judges that ECU powers on, lower electricity, the reproductive success number of times stack before and after motor 10 is moved, to react more accurately reproductive success number of times in working time.Motor can obtain for 10 working times from ECU, also can working time timer be set by DPF self-diagnosis system and obtain.
Further, the sensor of DPF Fail detecting apparatus can also comprise the pressure transducer 402 that detects DPF30 front and back pressure parameter, and as shown in Figure 1, DPF30 front end and back end is respectively equipped with pressure transducer 402.Pressure transducer 402 is connected with trouble analysis unit, to export the force value signal of detection to trouble analysis unit.Trouble analysis unit prestores the first pressure reduction calibration value and the first pressure reduction retention time of pressure reduction before and after DPF30; The pressure that trouble analysis unit detects according to pressure transducer 402, judges before and after DPF30 that pressure reduction is in the first pressure reduction calibration value, and endurance while exceeding for the first pressure reduction retention time, is diagnosed as DPF30 fault is installed.
Please refer to Fig. 4, Fig. 4 is DPF self-diagnosing method the 3rd embodiment's provided by the present invention flow chart.
Said apparatus specifically can carry out DPF according to following step fault diagnosis is not installed:
S31, beginning;
Before and after S32, DPF30, whether pressure reduction, in the first pressure reduction calibration value, is, enters step S33, no, enters step S35;
In the time that DPF30 occurs fault is installed, before and after it, pressure reduction will maintain near certain value, and the first pressure reduction calibration value can be value range, and front and back pressure reduction is in this value range.
Before and after S33, DPF30, whether the endurance of pressure reduction in the first pressure reduction calibration value reached for the first pressure reduction retention time, was, entered step S34, no, entered step S35;
S34, be diagnosed as DPF30 install fault, enter step S35;
S35, end.
DPF Fail detecting apparatus can also comprise the pressure transducer 402 that detects DPF30 front and back pressure, and pressure transducer 402 is connected with trouble analysis unit; Trouble analysis unit prestores the second pressure reduction calibration value and the second pressure reduction retention time of pressure reduction before and after DPF30; When the front temperature that temperature transducer 401 detects is greater than regeneration temperature calibration value, the pressure that trouble analysis unit detects according to pressure transducer 402, the maximum value that judges DPF30 front and back pressure reduction is less than the second pressure reduction calibration value, and exceedes for the second pressure reduction retention time, is diagnosed as DPF30 leakage failure.
Please refer to Fig. 5, Fig. 5 is DPF self-diagnosing method the 4th embodiment's provided by the present invention flow chart.
Said apparatus specifically can carry out the diagnosis of DPF30 leakage failure according to following step:
S41, beginning;
S42, judge before DPF30 whether temperature is greater than regeneration temperature calibration value, is, enters step S43, no, enter step S46;
Before and after S43, DPF30, whether pressure reduction is less than the second pressure reduction calibration value, is, enters step S44, no, enters step S46;
Whether the endurance that S44, DPF30 front and back pressure reduction maximum value is less than the second pressure reduction calibration value was greater than for the second pressure reduction retention time, was, entered step S45, no, returned to step S42;
S45, be diagnosed as DPF30 leakage failure, enter step S46;
S46, end.
For the various embodiments described above, DPF Fail detecting apparatus can also comprise warning piece, in the time that (fault, DPF30 leakage failure being installed than the fault of not regenerating for a long time described above, the frequent fault of regenerating, DPF30) is out of order in 40 diagnosis of DPF self-diagnosis system, output signal to warning piece, so that warning piece output alarm signal.Such as, warning piece can be signaling lamp 403, while breaking down, signaling lamp 403 provides optical signal existing with prompting driver fault.Now, signaling lamp 403 preferably can be arranged at the tailstock, has both been convenient to check, is also convenient to law enforcement agency and supervises.
As shown in Figure 1, ECU Fail detecting apparatus provided by the invention can also comprise ECU output terminal, in the time that (as mentioned above) is out of order in its diagnosis, diagnostic result can be exported to the ECU of motor 10, simultaneously, also can also export the signal obtaining to ECU, the pressure, the temperature signal that obtain than pressure transducer 402 described above and temperature transducer 401.In Fig. 1, DPF self-diagnosis system 40 can directly pass through CAN bus transfer signal to ECU.
For the various embodiments described above, the sensor of DPF self-diagnosis system can also comprise rear temperature transducer, the rear scale of thermometer definite value of temperature after the trouble analysis unit of DPF self-diagnosis system can prestore, when the rear temperature that trouble analysis unit judges detects exceedes this calibration value, be diagnosed as DPF overheating fault.On this basis, DPF self-diagnosis system can transfer to ECU by this signal, is interrupted the work of DPF by ECU, i.e. regeneration is interrupted, to protect DPF.
DPF self-diagnosis system 40 provided by the invention can judge the DPF30 fault of whether not regenerating in for a long time according to sensor signal, also can diagnose and whether in the frequent fault of regenerating, DPF30, fault, DPF30 leakage failure are installed, this DPF self-diagnosis system 40 can improve fault diagnosis efficiency, promotes car body performance.Certainly, this DPF self-diagnosis system can also gather other parameters of DPF, to diagnose out other faults, above-described embodiment provides four kinds of concrete fault diagnosis modes.In addition, this DPF self-diagnosis system 40 also has following effect:
This DPF self-diagnosis system 40 is separately located at outside ECU, develops separately without motor 10 MANUFACTURER, can be provided by third party, and standard is unified, is convenient to maintenance.Particularly, DPF self-diagnosis system 40 can be mounted near vehicle frame DPF30, and mounting point should possess suitable temperature.
And, exporting diagnostic result and the signal obtaining to ECU by DPF self-diagnosis system 40, load and the stitch that can reduce ECU use.
Above to a kind of DPF self-diagnosis system provided by the present invention, self-diagnosing method, and engines tail gas processing system is described in detail.Applied specific case herein principle of the present invention and mode of execution are set forth, above embodiment's explanation is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (16)
1. a DPF self-diagnosis system, DPF is located in motor exhaust system, it is characterized in that, described DPF self-diagnosis system comprises the sensor that detects DPF parameter, and be independent of the trouble analysis unit of DPF that Engine ECU arranges, described sensor is connected with described trouble analysis unit, and DPF fault is analyzed according to the DPF parameter detecting in described trouble analysis unit.
2. DPF self-diagnosis system as claimed in claim 1, is characterized in that, described sensor comprises the temperature transducer that detects temperature parameter before DPF, and described trouble analysis unit prestores regeneration temperature calibration value and regeneration nominal time interval time of DPF; The front temperature that described in described trouble analysis unit judges, temperature transducer detects is less than described regeneration temperature calibration value and endurance while exceeding regeneration calibration value interval time, is diagnosed as the fault of not regenerating for a long time.
3. DPF self-diagnosis system as claimed in claim 1, it is characterized in that, described sensor comprises the temperature transducer that detects temperature parameter before DPF, the calibration value and the number of times calibration value of reproductive success number of times working time that described trouble analysis unit prestores reproductive success time calibrating value, motor working time; Described trouble analysis unit judges, in working time calibration value, when reproductive success number of times is greater than number of times calibration value, is diagnosed as the frequent fault of regeneration;
Wherein, the front temperature that described temperature transducer detects is greater than described regeneration temperature calibration value and endurance while reaching described reproductive success time calibrating value, and reproductive success once.
4. DPF self-diagnosis system as claimed in claim 1, is characterized in that, described sensor comprises the pressure transducer that detects DPF front and back pressure parameter; Described trouble analysis unit prestores the first pressure reduction calibration value and the first pressure reduction retention time of pressure reduction before and after described DPF; The pressure that described trouble analysis unit detects according to described pressure transducer, judge that DPF front and back pressure reduction is in the first pressure reduction calibration value, and while exceeding for the first pressure reduction retention time, is diagnosed as DPF fault is not installed.
5. DPF self-diagnosis system as claimed in claim 1, is characterized in that, described sensor comprises the pressure transducer that detects DPF front and back pressure parameter and the temperature transducer that detects the front temperature parameter of DPF; The prestore regeneration temperature calibration value of described DPF of described trouble analysis unit, and the second pressure reduction calibration value of front and back pressure reduction, the second pressure reduction retention time; When the front temperature that described temperature transducer detects is greater than regeneration temperature calibration value, the pressure that described trouble analysis unit detects according to described pressure transducer, judge before and after DPF that pressure reduction is less than the second pressure reduction calibration value, and the endurance reached for the second pressure reduction retention time, be diagnosed as DPF leakage failure.
6. DPF self-diagnosis system as claimed in claim 1, it is characterized in that, described sensor comprises the temperature transducer that detects temperature parameter after DPF, the prestore rear scale of thermometer definite value of DPF of described trouble analysis unit, when the rear temperature that described trouble analysis unit judges detects exceedes calibration value, be diagnosed as DPF overheating fault.
7. the DPF self-diagnosis system as described in claim 1-6 any one, is characterized in that, also comprises warning piece, when described DPF self-diagnosis system diagnosis is out of order, outputs signal to described warning piece, with output alarm signal.
8. DPF self-diagnosis system as claimed in claim 7, is characterized in that, described warning piece is arranged at the afterbody of vehicle.
9. the DPF self-diagnosis system as described in claim 1-6 any one, is characterized in that, also comprises ECU output terminal, to export the signal that obtains and the diagnostic result ECU to motor.
10. an engines tail gas processing system, comprises the DOC and the DPF that join, and described DOC is connected with engine exhaust end, it is characterized in that, also comprises the DPF self-diagnosis system as described in claim 1-9 any one.
11. 1 kinds of DPF self-diagnosing methods, DPF is located in motor exhaust system, it is characterized in that,
Be independent of the trouble analysis unit that Engine ECU arranges DPF;
Detect DPF parameter;
Analyze DPF fault by trouble analysis unit according to the DPF parameter detecting.
12. self-diagnosing methods as claimed in claim 11, is characterized in that, comprise the steps:
The regeneration temperature calibration value of DPF and calibration value interval time of regenerating prestore;
The parameter that detects DPF comprises the front temperature of DPF;
The front temperature that judgement detects is less than regeneration temperature calibration value and endurance while reaching regeneration calibration value interval time, is diagnosed as the fault of not regenerating for a long time.
13. DPF self-diagnosing methods as claimed in claim 11, is characterized in that,
The calibration value and the number of times calibration value of reproductive success number of times working time of regeneration temperature calibration value, reproductive success time calibrating value, motor working time of DPF prestores;
The parameter that detects DPF comprises the front temperature of DPF;
The reproductive success number of times of statistics in working time calibration value;
Judge when reproductive success number of times is greater than number of times calibration value, be diagnosed as the frequent fault of regeneration;
Wherein, the front temperature of detection is greater than described regeneration temperature calibration value and endurance while reaching described reproductive success time calibrating value, and reproductive success once.
14. DPF self-diagnosing methods as claimed in claim 11, is characterized in that,
The first pressure reduction calibration value and the first pressure reduction retention time of pressure reduction before and after DPF prestore;
The parameter that detects DPF comprises DPF front and back pressure;
Judge before and after DPF that pressure reduction is in the first pressure reduction calibration value, and while exceeding for the first pressure reduction retention time, be diagnosed as DPF fault is not installed.
15. DPF self-diagnosing methods as claimed in claim 11, is characterized in that,
The second pressure reduction calibration value and the second pressure reduction retention time of pressure reduction before and after DPF prestore;
The parameter that detects DPF comprises front temperature and the DPF front and back pressure of DPF;
When temperature is greater than regeneration temperature calibration value before DPF, judges that the maximum value of DPF front and back pressure reduction is less than the second pressure reduction calibration value, and exceeded for the second pressure reduction retention time, be diagnosed as DPF leakage failure.
16. DPF self-diagnosis systems as claimed in claim 11, is characterized in that,
Scale of thermometer definite value after DPF prestores;
The parameter that detects DPF comprises the rear temperature of DPF;
When the rear temperature that judgement detects is greater than rear scale of thermometer definite value, be diagnosed as DPF overheating fault.
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| CN107345495A (en) * | 2016-05-06 | 2017-11-14 | 罗伯特·博世有限公司 | The frequent regeneration diagnostic method of diesel particulate filters |
| CN108412591A (en) * | 2018-02-01 | 2018-08-17 | 江铃汽车股份有限公司 | Automobile exhaust after-treatment system and automobile |
| CN108798841A (en) * | 2017-05-04 | 2018-11-13 | 大众汽车有限公司 | The exhaust equipment of internal combustion engine and the method for running the exhaust equipment |
| CN110132381A (en) * | 2019-06-29 | 2019-08-16 | 潍柴动力股份有限公司 | Venturi differential pressure pickup credibility diagnostic method and device |
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| CN111287826A (en) * | 2018-12-07 | 2020-06-16 | 北京福田康明斯发动机有限公司 | Device and method for reminding maintenance of DPF of particle trap and DPF |
| CN110132381A (en) * | 2019-06-29 | 2019-08-16 | 潍柴动力股份有限公司 | Venturi differential pressure pickup credibility diagnostic method and device |
| CN111322143B (en) * | 2020-02-26 | 2021-08-20 | 潍柴动力股份有限公司 | Diagnosis method of diesel engine particle trap, cloud server and vehicle-mounted terminal |
| CN111322143A (en) * | 2020-02-26 | 2020-06-23 | 潍柴动力股份有限公司 | Diagnosis method of diesel engine particle trap, cloud server and vehicle-mounted terminal |
| CN113803140A (en) * | 2020-06-11 | 2021-12-17 | 卓品智能科技无锡有限公司 | Method for diagnosing credibility of exhaust temperature sensor |
| CN111980789A (en) * | 2020-07-17 | 2020-11-24 | 东风汽车集团有限公司 | Method and system for diagnosing performance degradation of gasoline vehicle particle catcher |
| CN111980789B (en) * | 2020-07-17 | 2021-12-14 | 东风汽车集团有限公司 | Method and system for diagnosing performance degradation of gasoline vehicle particle catcher |
| CN114441095A (en) * | 2022-04-11 | 2022-05-06 | 潍柴动力股份有限公司 | Detection method and device of sensor |
| CN114856760A (en) * | 2022-05-12 | 2022-08-05 | 安庆中船柴油机有限公司 | Catalysis type particulate matter trap for purifying NOX and PM in coordination |
| CN117514431A (en) * | 2023-12-08 | 2024-02-06 | 中汽研汽车检验中心(昆明)有限公司 | DPF fault diagnosis method, device, terminal equipment and storage medium |
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