CN104265478A - Method for determining if intake pressure sensor of diesel engine is abnormal and for fault diagnosis - Google Patents
Method for determining if intake pressure sensor of diesel engine is abnormal and for fault diagnosis Download PDFInfo
- Publication number
- CN104265478A CN104265478A CN201410363826.4A CN201410363826A CN104265478A CN 104265478 A CN104265478 A CN 104265478A CN 201410363826 A CN201410363826 A CN 201410363826A CN 104265478 A CN104265478 A CN 104265478A
- Authority
- CN
- China
- Prior art keywords
- pressure sensor
- diesel engine
- air inlet
- inlet pressure
- abnormal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Landscapes
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a method for determining if an intake pressure sensor of a diesel engine is abnormal and for fault diagnosis, wherein the method for determining if the intake pressure sensor of the diesel engine is abnormal comprises the following steps: (1) in the operation state of the diesel engine, the average value of output voltage of the intake pressure sensor in the last two seconds is measured, and a diesel engine controller judges if the average value is in an allowed voltage range of the intake pressure sensor; and (2) if the average value is beyond the allowed voltage range of the intake pressure sensor, the diesel engine controller determines that the intake pressure sensor is abnormal; and if the intake pressure sensor is determined to be abnormal, the sensor is judged to be faulted or not according to the abnormal lasting time. The method can realize quick diagnosis and accurate positioning so as to realize quick maintenance.
Description
Technical field
The present invention relates to electronic Control for Diesel Engine field, particularly one determines supercharged diesel engine air inlet pressure sensor whether exception and method for diagnosing faults.
Background technique
Air inlet pressure sensor is the vitals of electronic diesel control, automatical control system calculates the actual tolerance entering cylinder according to the size of suction pressure, and then revise and restriction actual fuel injection amount, so, whether normal the state of air inlet pressure sensor is, has material impact to engine power performance, Economy and discharge.
At present, in diesel engine electric control system fault diagnosis technology, the voltage exported by direct measuring transducer carrys out failure judgement.When output voltage exceedes the maximum magnitude of controller setting, namely judge sensor experiences failure.Its shortcoming is inaccurate by output voltage failure judgement, and when changing as sensor characteristics or occur zero shift, the method cannot detect, and easily occurs undetected.Secondly, output voltage affects by power-supply system, if when power-supply system is unstable, the method easily occurs flase drop.
The information being disclosed in this background technique part is only intended to increase the understanding to general background of the present invention, and should not be regarded as admitting or imply in any form that this information structure has been prior art that persons skilled in the art are known.
Summary of the invention
One is the object of the present invention is to provide to determine supercharged diesel engine air inlet pressure sensor whether exception and method for diagnosing faults, detection is contrasted in air inlet pressure sensor is run, realize the quick diagnosis to air inlet pressure sensor and accurate location, increase the reliability of automatical control system, realize Fast-Maintenance.
For achieving the above object, the invention provides a kind of method whether supercharged diesel engine air inlet pressure sensor is abnormal of determining, comprise the steps: step 1, under diesel engine running state, measure the mean value of the output voltage of air inlet pressure sensor in first 2 seconds, judge whether this mean value is in the voltage range allowable of air inlet pressure sensor by diesel engine controller; Step 2, if mean value exceeds the voltage range allowable of air inlet pressure sensor, then diesel engine controller determination air inlet pressure sensor is abnormal.
Preferably, in step 2, if when mean value is in the voltage range allowable of air inlet pressure sensor, then perform following steps: step 1a, calculate the mean square deviation of suction pressure in front 2s, judge whether this mean square deviation is less than 0.15bar by diesel engine controller; Step 2a, if mean square deviation is greater than 0.15bar, then diesel engine controller determination air inlet pressure sensor is abnormal.
Preferably, in step 2a, if when mean square deviation is less than 0.15bar, then perform following steps: step 1b, under diesel engine running state, calculate the estimated value of suction pressure, gather the measured value of air inlet pressure sensor simultaneously, and judge whether the relative deviation of estimated value and measured value is greater than 30% by diesel engine controller; Step 2b, if the relative deviation of estimated value and actual value is greater than 30%, then diesel engine controller determination air inlet pressure sensor is abnormal.
Present invention also offers a kind of method for diagnosing faults of supercharged diesel engine air inlet pressure sensor, if diesel engine controller is abnormal according to said method determination air inlet pressure sensor, then diesel engine controller carries out Abnormal lasting accumulation; If Abnormal lasting accumulation reaches the first predetermined value, then diesel engine controller assert that air inlet pressure sensor fault occurs.
Preferably, if diesel engine controller assert that air inlet pressure sensor fault occurs, then diesel engine controller carries out the endurance accumulation of Failure elimination; If the endurance accumulation of Failure elimination reaches the second predetermined value, then diesel engine controller assert air inlet pressure sensor Failure elimination.
Compared with prior art, the present invention has following beneficial effect: by detecting the operating contrast of air inlet pressure sensor, realizes the quick diagnosis to air inlet pressure sensor and accurate location, increases the reliability of automatical control system, realize Fast-Maintenance.
Accompanying drawing explanation
Fig. 1 determines supercharged diesel engine air inlet pressure sensor whether exception and method for diagnosing faults schematic diagram according to of the present invention;
According to of the present invention, Fig. 2 determines that carrying out hardware check in the method whether supercharged diesel engine air inlet pressure sensor is abnormal surveys and the self-monitoring principle schematic of logic;
Fig. 3 is the performance diagram of the air inlet pressure sensor related in the present invention;
Fig. 4 is according to principle schematic of determining to carry out in the method whether supercharged diesel engine air inlet pressure sensor is abnormal Detection of Stability and estimated value contrast detection of the present invention;
Fig. 5 is the principle schematic of the method for diagnosing faults according to supercharged diesel engine air inlet pressure sensor of the present invention;
Fig. 6 is in operation to determine supercharged diesel engine air inlet pressure sensor whether exception and method for diagnosing faults schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention not by the restriction of embodiment.
Clearly represent unless otherwise other, otherwise in whole specification and claims, term " comprise " or its conversion as " comprising " or " including " etc. by be understood to include the element of stating or constituent element, and do not get rid of other element or other constituent element.
As shown in Figure 1 and Figure 6; according to the determination supercharged diesel engine air inlet pressure sensor of the specific embodiment of the invention, exception and method for diagnosing faults are on the basis based on existing sensor; by shutting down self-inspection or contrast detection in running to carry out fault diagnosis to supercharged diesel engine air inlet pressure sensor quickly and accurately; no matter be to increase automatical control system reliability, or have important practical significance to raising Fast-Maintenance.Particularly, after automatical control system powers on, under outage state, diesel engine controller, according to the intake pressure sensor signal collected, carries out self-inspection to air inlet pressure sensor.In diesel engine runs, controller carries out contrast according to sensor signal and detects.Self-inspection and contrast detection can judge that whether sensor is abnormal, and the time that controller continues according to sensor abnormality again assert whether sensor breaks down.Finally, according to the sensor recovery normal endurance, controller can also assert whether fault is eliminated.
As shown in Figure 2, after diesel engine electric control system powers on, during shutdown, air inlet pressure sensor power-on self-test is divided into hardware check and surveys and logic Autonomous test.
First, carry out sensor hardware Autonomous test, namely utilize the voltage signal of sensor collection to judge.Particularly, whether detecting sensor output voltage values exceeds voltage range allowable, if exceed 110% of upper voltage limit value or lower than 90% of lower voltage limit value, then to judge that sensor occurs abnormal for controller, otherwise sensor hardware is without exception.Because after Sensor Design completes, its characteristic curve (relation of institute's measuring pressure and sensor output voltage) must meet using scope requirement.Therefore, when the voltage outside characteristic curve (see Fig. 3) that sensor exports, as exceed upper voltage limit value 110% or lower than 90% of lower voltage limit value, then illustrate that institute's measuring pressure is not within using scope, do not meet Sensor Design, therefore controller detects that sensor occurs extremely.In addition, the processing of general sensor all has error, and therefore upper and lower is not a particular value, has slight deviations but must within 5%, and the sensor upper voltage limit as design is 3V, then actual sensor upper voltage limit should between 2.85V ~ 3.15V.Therefore testing conditions should be greater than 5%, therefore 110% of capping voltage, 90% of lower limit.If sensor output voltage exceeds 10% this scope, then illustrate that sensor has exception.
Secondly, if sensor is surveyed by hardware check, then carry out logic Autonomous test, otherwise skip logic self-inspection, as shown in Figure 2, in logic Autonomous test, first judge that the measured value of current suction pressure is with or without the maximum magnitude exceeding ambient value.Wherein, external pressure refers to the suction pressure of surveying when diesel engine shuts down, and external pressure is relevant to altitude, considering the region that diesel engine likely uses, suction pressure should be greater than 0.04Mpa (corresponding 5000m height above sea level), be less than 0.12Mpa (corresponding negative height above sea level), China's motor using scope is in the terrestrial range of height above sea level 5000m to-200m, the external pressure of the corresponding 0.04MPa of 5000m, corresponding 0.12 MPa of-200m, use surveyed external pressure must within the scope of this, therefore super going beyond the scope be irrational.If suction pressure is not in this scope, time namely higher than 0.12MPa or lower than 0.04MPa, it is abnormal that controller judges that sensor hardware occurs, otherwise without exception.When occurring abnormal, not carrying out next step and judging.If the measured value of current suction pressure does not exceed ambient value maximum magnitude (as shown in Fig. 2 intermediate portion); again concrete detect when pre-test suction pressure value and front once shut down time the effective environment force value that stores; as shown in Fig. 2 right part; if the absolute value of both deviations is greater than 0.03MPa; when then illustrating that this powers on and last subnormal when shutting down; residing for vehicle, height above sea level difference more than 3000m, does not meet use convention.There is not normal throw within the border at 3000m in China, and just can climb to rapidly the landform of mountain top (not stopping in midway).Adopt this kind of determination methods to be because height above sea level gradually changes in process, so suction pressure when front and back are shut down for twice is gradual, if there is sudden change, illustrate that suction pressure is abnormal.Therefore, when deviation is large, diesel engine controller judges that sensor hardware occurs extremely, otherwise sensor hardware is without exception.
As shown in Figure 4, after diesel engine running, controller carries out contrast according to intake pressure sensor signal and detects, and comprising: to the Detection of Stability of sensor institute output voltage values, and the estimated value that calculates of suction pressure measured value and diesel engine controller contrasts and detects.
First, air inlet pressure sensor Detection of Stability is carried out.The sensor voltage value collected in 2s (is had 8 collections, is respectively u by controller in 2s
1, u
2u
8), the principle following FIFO leaves in its internal memory.The average voltage subsequently 8 times gathered, see formula 1, judge average voltage u whether in sensor tolerance zone, if mean value exceedes sensor tolerance zone, then represent running state lower sensor brownout (open circuit and ground short circuit) or too high (with power supply short circuit), then controller judges that in operation, sensor hardware occurs abnormal.If normal, enter next step and detect, otherwise do not enter the detection of next step mean square deviation.
Secondly, the average voltage that previous step calculates by controller is converted into suction pressure according to sensor characteristics, and is stored in controller internal memory.8 the air inlet pressure force value calculated in continuous record 2s (are respectively x
1, x
2x
8), solve mean square deviation δ to 8 air inlet pressure force value, formula is shown in formula 2.Control to judge whether mean square deviation δ is less than 0.15bar, if do not satisfy condition, sensor occurs abnormal, no longer carries out estimated value contrast and detects.
Wherein, the every 250ms of controller gathers once, and 2s gathers 8 times altogether, and these 8 measured values can be calculated mean square deviation by above-mentioned formula 2.If virtual connection fault appears in sensor in running, i.e. maximum during measurement value sensor (or minimum), time and normal, the now violent saltus step of measured value.When sensor is normal, measured value is gradual, and mean square deviation is within 0.05.There is virtual connection fault in actual experimental in the past, and obtained mean square deviation at more than 0.15bar according to fault data process, therefore get 0.15bar.So 0.15bar is obtained by test data.
Finally, air inlet pressure sensor estimated value (the air inlet pressure force value that controller calculates according to other data) and measured value (by sensor actual measurement air inlet pressure force value out) is contrasted.Wherein, air inlet pressure sensor estimated value calculates and comprises following a few step:
1) diesel engine controller calculates the basic estimated value p ' of suction pressure according to rotating speed and circulating fuel injection quantity
im, computational methods as shown in Equation 3.Basic suction pressure estimated value p ' has been stored in controller
imwith the performance plot of rotating speed n and circulation oil mass Q, controller obtains p ' by look-up-table function
im.
p′
im＝f(n,Q) (3)
2) correction factor ε is calculated, under this correction factor is used for different operating mode, the time dependent correction of suction tude internal pressure.Calculate correction factor ε formula as shown in Equation 4.Wherein coefficient a is obtained by formula 5.The performance plot of coefficient a and rotating speed n and circulation oil mass Q, controller obtains a by look-up-table function.
ε＝e
-at (4)
a＝f(n,Q) (5)
3) air inlet pressure sensor estimated value is calculated
4) estimated value is calculated
with measured value deviation α, formula as shown in Equation 7.
Work as estimated value
with measured value p
imdeviation α to assert that sensor occurs when being greater than 30% abnormal, otherwise sensor hardware is without exception.It should be noted that, in line computation, because controller computing capability is inadequate, therefore there is error with actual measured value, generally about 25% in estimated value.Therefore get 30%, prevent because of the mistaken diagnosis of error of calculations causing trouble.
As shown in Figure 5, it is without exception that the self-inspection of above-mentioned air inlet pressure sensor and contrast detection only judge that sensor has, and also needs to judge that sensor has fault-free by the fault identification based on continuous time.Namely when the abnormal endurance occurred more than the first predetermined value time, assert that fault occurs.When sensor fault occurs, then controller starts to judge that sensor is normal with or without recovery, if abnormal state disappears, when the normal state endurance is more than the second predetermined value, assert that fault is eliminated.Wherein, above-mentioned first predetermined value and the second predetermined value specifically can be set to 500, because, general, the elapsed time clock of control system is 4ms, as long as in 2s, occur and unbroken words, diesel engine controller assert that fault occurs extremely always, in like manner, abnormal state disappears, and when the time of recovery normal continuous reaches 2s, diesel engine controller assert that fault is eliminated.Specific as follows:
1) when air inlet pressure sensor did not occur fault, then air inlet pressure sensor breakdown judge is carried out; Break down if air inlet pressure sensor has been assert, then carry out air inlet pressure sensor trouble shooting judgement.
2) when air inlet pressure sensor did not occur fault, air inlet pressure sensor did not occur extremely yet, and now illustrate that air inlet pressure sensor is in normal working, therefore anomalous counts value resets, air inlet pressure sensor fault-free.
3) when air inlet pressure sensor did not occur fault, but air inlet pressure sensor occurs abnormal, now illustrate that air inlet pressure sensor has problem but can not assert that fault occurs, therefore increase anomalous counts, whether truly occurred by time (anomalous counts illustrates the time that the fault continues) failure judgement of aberrant continuation.If in running, when anomalous counts accumulation reaches the first predetermined value, then controller assert that fault occurs.Now, fault recovery count value will reset, and uses when recovering to judge in order to air inlet pressure sensor.If in running, anomalous counts does not reach the first predetermined value, then do not change air inlet pressure sensor state, namely air inlet pressure sensor is regarded as normal state.
4) when air inlet pressure sensor breaks down, but no abnormality seen when air inlet pressure sensor detects, now illustrate that air inlet pressure sensor is abnormal disappear but can not assert that fault is removed, therefore increase fault recovery counting, whether really eliminated by abnormal time (fault recovery counting illustrates the time that the Failure elimination continues) failure judgement continued that disappears.If in running, when fault recovery count accumulation reaches the second predetermined value, then controller assert Failure elimination.Now, anomalous counts value will reset, and uses in order to during air inlet pressure sensor breakdown judge.If in running, fault recovery counting does not reach the second predetermined value, then do not change air inlet pressure sensor state, namely air inlet pressure sensor is regarded as fault state.
5) when air inlet pressure sensor breaks down, air inlet pressure sensor detects and also occurs exception simultaneously, now illustrates that air inlet pressure sensor is still in fault state.Therefore fault recovery count value resets, and controller thinks that air inlet pressure sensor is in fault state all the time.
The aforementioned description to concrete exemplary of the present invention is to illustrate and the object of illustration.These descriptions not want the present invention to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.The object selected exemplary embodiment and describe is to explain certain principles of the present invention and practical application thereof, thus those skilled in the art can be realized and utilize various different exemplary of the present invention and various different selection and change.Scope of the present invention is intended to limited by claims and equivalents thereof.
Claims (5)
1. determine to it is characterized in that the method whether supercharged diesel engine air inlet pressure sensor is abnormal, comprise the steps:
Step 1, under diesel engine running state, measures the mean value of the output voltage of air inlet pressure sensor in first 2 seconds, judges whether this mean value is in the voltage range allowable of air inlet pressure sensor by diesel engine controller;
Step 2, if described mean value exceeds the voltage range allowable of described air inlet pressure sensor, then diesel engine controller determination air inlet pressure sensor is abnormal.
2. according to claim 1ly determine the method that supercharged diesel engine air inlet pressure sensor is whether abnormal, it is characterized in that, in described step 2, if when described mean value is in the voltage range allowable of air inlet pressure sensor, then perform following steps:
Step 1a, calculates the mean square deviation of suction pressure in front 2s, judges whether this mean square deviation is less than 0.15bar by diesel engine controller;
Step 2a, if described mean square deviation is greater than 0.15bar, then diesel engine controller determination air inlet pressure sensor is abnormal.
3. according to claim 2ly determine the method that supercharged diesel engine air inlet pressure sensor is whether abnormal, it is characterized in that, in described step 2a, if when described mean square deviation is less than 0.15bar, then perform following steps:
Step 1b, under diesel engine running state, calculates the estimated value of suction pressure, gathers the measured value of air inlet pressure sensor simultaneously, and judge whether the relative deviation of described estimated value and described measured value is greater than 30% by diesel engine controller;
Step 2b, if the relative deviation of described estimated value and described actual value is greater than 30%, then diesel engine controller determination air inlet pressure sensor is abnormal.
4. the method for diagnosing faults of a supercharged diesel engine air inlet pressure sensor, it is characterized in that, if the method determination air inlet pressure sensor of diesel engine controller according to any one of claims 1 to 3 is abnormal, then diesel engine controller carries out Abnormal lasting accumulation;
If Abnormal lasting accumulation reaches the first predetermined value, then diesel engine controller assert that air inlet pressure sensor fault occurs.
5. the method for diagnosing faults of supercharged diesel engine air inlet pressure sensor according to claim 4, is characterized in that, if diesel engine controller assert that air inlet pressure sensor fault occurs, then diesel engine controller carries out the endurance accumulation of Failure elimination;
If the endurance accumulation of Failure elimination reaches the second predetermined value, then diesel engine controller assert air inlet pressure sensor Failure elimination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410363826.4A CN104265478B (en) | 2014-05-28 | 2014-07-28 | Determine supercharged diesel engine air inlet pressure sensor whether exception and method for diagnosing faults |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2014102309838 | 2014-05-28 | ||
| CN201410230983 | 2014-05-28 | ||
| CN201410230983.8 | 2014-05-28 | ||
| CN201410363826.4A CN104265478B (en) | 2014-05-28 | 2014-07-28 | Determine supercharged diesel engine air inlet pressure sensor whether exception and method for diagnosing faults |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104265478A true CN104265478A (en) | 2015-01-07 |
| CN104265478B CN104265478B (en) | 2016-07-27 |
Family
ID=52157035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410363826.4A Active CN104265478B (en) | 2014-05-28 | 2014-07-28 | Determine supercharged diesel engine air inlet pressure sensor whether exception and method for diagnosing faults |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104265478B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596564A (en) * | 2015-02-04 | 2015-05-06 | 中国工程物理研究院化工材料研究所 | System and method for judging fault of sensor |
| CN107505089A (en) * | 2016-06-14 | 2017-12-22 | 日本特殊陶业株式会社 | The manufacture method of knock sensor |
| CN108266253A (en) * | 2017-12-26 | 2018-07-10 | 潍柴动力股份有限公司 | For the self-learning method of DPF differential pressure pickups |
| CN110831050A (en) * | 2019-11-21 | 2020-02-21 | 李炳勇 | Sensor node control method and system |
| CN111931951A (en) * | 2020-06-19 | 2020-11-13 | 中国市政工程华北设计研究总院有限公司 | Online monitoring data verification method for urban drainage facility |
| CN112302817A (en) * | 2020-10-28 | 2021-02-02 | 中国第一汽车股份有限公司 | Fault diagnosis method, device, equipment and storage medium for air inlet pressure sensor |
| CN112664294A (en) * | 2021-02-02 | 2021-04-16 | 中国重汽集团济南动力有限公司 | Engine oil liquid level detection method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11324807A (en) * | 1998-05-08 | 1999-11-26 | Suzuki Motor Corp | Failure diagnostic device for gaseous fuel supplying device |
| US20020189599A1 (en) * | 2001-06-19 | 2002-12-19 | Kotwicki Allan J. | Diagnosis system for upstream gauge sensor, downstream absolute pressure sensor |
| CN101151452A (en) * | 2005-04-06 | 2008-03-26 | 株式会社电装 | Fuel injection controller |
| CN201673006U (en) * | 2010-05-05 | 2010-12-15 | 重庆多耐达科技有限公司 | Pressure sensor fault monitoring circuit |
| CN201748998U (en) * | 2010-11-02 | 2011-02-16 | 重庆康明斯发动机有限公司 | Field detector for voltage sensor |
-
2014
- 2014-07-28 CN CN201410363826.4A patent/CN104265478B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11324807A (en) * | 1998-05-08 | 1999-11-26 | Suzuki Motor Corp | Failure diagnostic device for gaseous fuel supplying device |
| US20020189599A1 (en) * | 2001-06-19 | 2002-12-19 | Kotwicki Allan J. | Diagnosis system for upstream gauge sensor, downstream absolute pressure sensor |
| CN101151452A (en) * | 2005-04-06 | 2008-03-26 | 株式会社电装 | Fuel injection controller |
| CN201673006U (en) * | 2010-05-05 | 2010-12-15 | 重庆多耐达科技有限公司 | Pressure sensor fault monitoring circuit |
| CN201748998U (en) * | 2010-11-02 | 2011-02-16 | 重庆康明斯发动机有限公司 | Field detector for voltage sensor |
Non-Patent Citations (2)
| Title |
|---|
| 果青等: "《上海通用赛欧轿车使用与维修手册 》", 31 January 2004, article "电喷发动机的电控系统的故障与排除" * |
| 黄伟: "汽车发动机车载监控系统技术研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》, no. 3, 15 March 2012 (2012-03-15) * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596564A (en) * | 2015-02-04 | 2015-05-06 | 中国工程物理研究院化工材料研究所 | System and method for judging fault of sensor |
| CN107505089A (en) * | 2016-06-14 | 2017-12-22 | 日本特殊陶业株式会社 | The manufacture method of knock sensor |
| CN107505089B (en) * | 2016-06-14 | 2021-01-12 | 日本特殊陶业株式会社 | Method for manufacturing knock sensor |
| CN108266253A (en) * | 2017-12-26 | 2018-07-10 | 潍柴动力股份有限公司 | For the self-learning method of DPF differential pressure pickups |
| CN110831050A (en) * | 2019-11-21 | 2020-02-21 | 李炳勇 | Sensor node control method and system |
| CN111931951A (en) * | 2020-06-19 | 2020-11-13 | 中国市政工程华北设计研究总院有限公司 | Online monitoring data verification method for urban drainage facility |
| CN112302817A (en) * | 2020-10-28 | 2021-02-02 | 中国第一汽车股份有限公司 | Fault diagnosis method, device, equipment and storage medium for air inlet pressure sensor |
| CN112302817B (en) * | 2020-10-28 | 2022-11-29 | 中国第一汽车股份有限公司 | Fault diagnosis method, device, equipment and storage medium for air inlet pressure sensor |
| CN112664294A (en) * | 2021-02-02 | 2021-04-16 | 中国重汽集团济南动力有限公司 | Engine oil liquid level detection method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104265478B (en) | 2016-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104265477A (en) | Method for determining whether air inlet pressure sensor of supercharged diesel engine is abnormal or not and diagnosing faults | |
| CN104265478B (en) | Determine supercharged diesel engine air inlet pressure sensor whether exception and method for diagnosing faults | |
| CN106017737B (en) | A kind of fault diagnosis method and system of temperature sensor | |
| CN107503854B (en) | Method for determining abnormality and fault diagnosis of exhaust temperature sensor of supercharged diesel engine | |
| US7904229B2 (en) | Method for determination of engine lubrication oil consumption | |
| RU2693340C9 (en) | System for determining the state of an air filter, particularly for internal combustion engines, a method of determining the state of an air filter, a computer-readable medium, an internal combustion engine, a ground vehicle | |
| CN102818658B (en) | Motor stator temperature sensor fault diagnostic system | |
| US20140200852A1 (en) | Exhaust manifold pressure based misfire detection for internal combustion engines | |
| CN105761325B (en) | It is adapted to vehicle ignition determination methods, the device and system of multi-vehicle-type | |
| CN110715710B (en) | Liquid level meter fault detection method and device | |
| CN107976601A (en) | A kind of fault diagnosis circuit and method for NTC temperature acquisition circuits | |
| CN116907727B (en) | Method and device for detecting fault of pressure sensor before vortex, vehicle and storage medium | |
| CN102269030A (en) | Oil-gas separator and crankcase blow-by amount detection control system with same | |
| CN204101643U (en) | Three-phase electricity condition detection apparatus and electric system | |
| CN103913706A (en) | Lithium-battery electric-quantity detection method and device | |
| CN103698727A (en) | Method for monitoring short-circuit fault of current sensor of electric vehicle | |
| CN111391660B (en) | Method and device for detecting pressure of gas storage cylinder and engine | |
| US7857508B2 (en) | Method for monitoring the functionality of a temperature sensor | |
| CN202117733U (en) | Oil-gas separator and crankshaft case gas blowby quantity detection control system provided with same | |
| US11209492B2 (en) | Method and system for determining battery state of health | |
| CN102959360B (en) | Method of detecting fault with the means for de-icing probe for measuring physical parameter | |
| US10557433B2 (en) | System and method for detecting a fault condition associated with a valvetrain of an engine | |
| CN112213675A (en) | Current sensor fault judgment method and device | |
| CN104977479A (en) | Three-phase power state detection device and method and motor system | |
| KR100569078B1 (en) | A fault detection device for air temperature sensor of vehicle and method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |