CN111775958A - Method for diagnosing loss of crankshaft signal and camshaft signal of engine - Google Patents
Method for diagnosing loss of crankshaft signal and camshaft signal of engine Download PDFInfo
- Publication number
- CN111775958A CN111775958A CN202010619750.2A CN202010619750A CN111775958A CN 111775958 A CN111775958 A CN 111775958A CN 202010619750 A CN202010619750 A CN 202010619750A CN 111775958 A CN111775958 A CN 111775958A
- Authority
- CN
- China
- Prior art keywords
- signal
- camshaft
- crankshaft
- engine
- oil pressure
- 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
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000003921 oil Substances 0.000 claims abstract description 47
- 239000010705 motor oil Substances 0.000 claims abstract description 27
- 230000002159 abnormal effect Effects 0.000 claims abstract description 9
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 239000007858 starting material Substances 0.000 claims abstract description 6
- 230000006641 stabilisation Effects 0.000 claims description 9
- 238000011105 stabilization Methods 0.000 claims description 9
- 230000005856 abnormality Effects 0.000 claims description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000013024 troubleshooting Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
- B60W50/0205—Diagnosing or detecting failures; Failure detection models
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
- F02B77/083—Safety, indicating, or supervising devices relating to maintenance, e.g. diagnostic device
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Human Computer Interaction (AREA)
- Transportation (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention relates to a method for diagnosing loss of a crankshaft signal and a camshaft signal of an engine, which comprises the following steps: monitoring a key position signal; if the key position signal is START, monitoring an oil pressure signal, a crankshaft signal and a camshaft signal; if no crankshaft signal exists and a camshaft signal exists, outputting a crankshaft abnormal signal; if no camshaft signal exists and a crankshaft signal exists, outputting a camshaft abnormal signal; if no crankshaft signal exists and no camshaft signal exists, comparing the engine oil pressure signal with the lower limit value of the normal engine oil pressure; if the engine oil pressure signal exceeds the lower limit value of the normal engine oil pressure, outputting abnormal signals of a crankshaft and a camshaft; if the engine oil pressure does not exceed the lower limit value of the normal engine oil pressure, a starter abnormal signal is output. The invention can still make correct judgment on the operation conditions of the crankshaft rotating speed sensor, the camshaft rotating speed sensor and the engine when the crankshaft signal and the camshaft signal are lost simultaneously; the logical relation among the crankshaft signal, the camshaft signal and the engine rotation condition is perfected.
Description
Technical Field
The invention relates to the technical field of engine monitoring, in particular to a method for diagnosing loss of a crankshaft signal and a camshaft signal of an engine.
Background
The normal operation of the engine requires that both the crankshaft speed sensor and the camshaft speed sensor work normally at the same time. If one of the two signals fails, the crankshaft signal or the camshaft signal cannot be sent to the vehicle-mounted EECU, and then the engine failure that the crankshaft signal and the camshaft signal cannot be synchronized normally occurs, so that the engine cannot work normally.
In the existing engine control system, the following method is adopted to detect the loss problem of the crankshaft signal and the camshaft signal: the EECU monitors a crankshaft signal and a camshaft signal simultaneously; when the engine is running, the EECU will report that one of the crankshaft signal and the camshaft signal is missing if it finds that only the other is available.
The defects of the prior art are as follows:
the EECU determines whether the engine is rotating based on the crankshaft signal and the camshaft signal; and if the crankshaft signal and the camshaft signal are lost simultaneously, the EECU can not know whether the engine rotates, so that the working conditions of the crankshaft rotating speed sensor and the camshaft rotating speed sensor can not be known, and further difficulty is brought to troubleshooting work.
Disclosure of Invention
The invention provides a method for diagnosing the loss of a crankshaft signal and a camshaft signal of an engine aiming at the problems, which gets rid of the dependence on the crankshaft signal and the camshaft signal when judging whether the engine is in operation, and can make correct judgment on the operation conditions of a crankshaft rotating speed sensor, a camshaft rotating speed sensor and the engine even if the crankshaft signal and the camshaft signal are lost simultaneously; the method is used for providing a more perfect logical relation among a crankshaft signal, a camshaft signal and the rotation condition of the engine and helping to more accurately position a fault point in troubleshooting work.
In order to solve the problems, the technical scheme provided by the invention is as follows:
a method of diagnosing engine crankshaft and camshaft signal loss comprising the steps of:
s100, continuously monitoring the key position signal, and performing the following operations according to the key position signal:
if the key position signal is START, continuously monitoring an oil pressure signal, a crankshaft signal and a camshaft signal from the moment when the key position signal is START; otherwise, continuing to monitor the key position signal;
s200, according to the crankshaft signal and the camshaft signal, the following operations are carried out:
if the crankshaft signal does not exist and the camshaft signal exists, outputting a crankshaft abnormal signal;
if the camshaft signal does not exist and the crankshaft signal exists, outputting a camshaft abnormal signal;
if the crankshaft signal does not exist and the camshaft signal does not exist, comparing the engine oil pressure signal with the lower limit value of the normal pressure of the engine oil;
s300, according to the comparison result between the engine oil pressure signal and the engine oil normal pressure lower limit value, the following operations are carried out:
outputting a crankshaft and camshaft abnormality signal if the oil pressure signal exceeds the oil normal pressure lower limit value within an oil pressure stabilization time after the time when the key position signal is received as START;
outputting a starter abnormality signal if the oil pressure signal does not exceed the oil normal pressure lower limit value within an oil pressure stabilization time after the time when the key position signal is received as START
Preferably, the oil pressure signal is collected by an oil pressure sensor mounted at an outlet end of an oil filter of the engine.
Preferably, the crankshaft signal is collected by a crankshaft speed sensor mounted on a flywheel housing of the engine.
Preferably, the camshaft signal is collected by a camshaft revolution speed sensor mounted on a cylinder head of the engine.
Preferably, the oil pressure sensor, the crankshaft speed sensor and the camshaft speed sensor are respectively connected with an electric signal of an on-board EECU.
Preferably, the lower limit value of the normal pressure of the engine oil is preset manually; the engine oil pressure stabilizing time is preset manually.
Preferably, the oil pressure stabilization time is set to 5 seconds.
Preferably, the lower limit value of the normal oil pressure is set to 50 kPa.
Compared with the prior art, the invention has the following advantages:
1. the method adopts the key position signal and the engine oil pressure signal to judge whether the engine is running, and gets rid of the dependence on a crankshaft signal and a camshaft signal when judging whether the engine is running, so that the correct judgment can be made on the running conditions of the crankshaft rotating speed sensor, the camshaft rotating speed sensor and the engine under the condition that the crankshaft signal and the camshaft signal are lost simultaneously;
2. the logical relation among the crankshaft signal, the camshaft signal and the engine rotation condition is perfected, and the fault point is positioned more accurately in the troubleshooting work.
Drawings
FIG. 1 is a schematic flow chart of an embodiment of the present invention;
FIG. 2 is a schematic diagram of the mounting locations of an oil pressure sensor, a crankshaft speed sensor and a camshaft speed sensor on an engine and their connections to an EECU in accordance with an embodiment of the present invention;
the engine comprises an engine 1, an engine oil pressure sensor 2, a crankshaft rotating speed sensor 3, a camshaft rotating speed sensor 4, an engine oil filter 5, an outlet end 6, a flywheel shell 7, a cylinder cover 8 and an EECU 9.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to be purely exemplary and are not intended to limit the scope of the invention, as various equivalent modifications of the invention will occur to those skilled in the art upon reading the present disclosure and fall within the scope of the appended claims.
The normal operation of the engine 1 requires both the crankshaft speed sensor 3 and the camshaft speed sensor 4 to function properly. As shown in FIG. 1, the present embodiment relates to a method for diagnosing loss of a crankshaft signal and a camshaft signal of an engine, comprising the steps of:
s100, continuously monitoring the key position signal, and performing the following operations according to the key position signal:
if the key position signal is START, continuously monitoring an oil pressure signal, a crankshaft signal and a camshaft signal from the moment when the key position signal is START; otherwise, the key position signal is continuously monitored.
The oil pressure signal is picked up by an oil pressure sensor 2 mounted at the outlet end 6 of an oil filter 5 of the engine 1. The crankshaft signal is picked up by a crankshaft speed sensor 3 mounted on the flywheel housing 7 of the engine 1. The camshaft signal is picked up by a camshaft revolution speed sensor 4 mounted on a cylinder head 8 of the engine 1. The engine oil pressure sensor 2, the crankshaft speed sensor 3 and the camshaft speed sensor 4 are respectively connected with the vehicle-mounted EECU9 through electric signals.
S200, according to the crankshaft signal and the camshaft signal, the following operations are carried out:
if there is no crankshaft signal and there is a camshaft signal, a crankshaft abnormality signal is output.
If there is no camshaft signal and there is a crankshaft signal, then a camshaft abnormality signal is output.
If there is no crankshaft signal and no camshaft signal, the oil pressure signal is compared to the lower limit of normal oil pressure.
S300, according to the comparison result of the engine oil pressure signal and the engine oil normal pressure lower limit value, the following operations are carried out:
and if the oil pressure signal exceeds the lower limit value of the normal oil pressure within the stable oil pressure time after the key position signal is received as START, outputting an abnormal signal of the crankshaft and the camshaft.
If the oil pressure signal does not exceed the lower limit value of the normal oil pressure within the oil pressure stabilization time after the key position signal is received as START, a starter abnormality signal is output.
The lower limit value of the normal pressure of the engine oil is manually preset; in the present embodiment, the lower limit value of the normal oil pressure is set to 50 kPa. The engine oil pressure stabilizing time is preset manually; in this embodiment, the oil pressure stabilization time is set to 5 seconds. In other application scenarios, the oil pressure stabilization time or the lower limit value of the normal oil pressure can be set to other values according to specific situations, without affecting the application effect of the present invention.
The principle of doing so is: during the process that the starter drives the engine 1 to run, if the crankshaft signal and the camshaft signal are both lost, the EECU9 may further determine that the engine 1 is rotating by measuring another signal, so as to report that the crankshaft signal and the camshaft signal are simultaneously lost, for example, an oil pressure signal used in this embodiment, because the oil pump will work after the starter drives the engine 1 to run, and the EECU9 will measure the oil pressure rise. That is, when the key position signal is set to START and then lasts for 5 seconds, during which the oil pressure rises from 0kPa to over 50kPa, in this case, if the EECU9 does not monitor the camshaft signal and the crankshaft signal, it is determined that there is a problem with both the crankshaft speed sensor 3 and the camshaft speed sensor 4, and an alarm decision is made.
In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, invention lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. To those skilled in the art; various modifications to these embodiments will be readily apparent, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A method of diagnosing loss of a crankshaft signal and a camshaft signal of an engine, comprising: comprises the following steps:
s100, continuously monitoring the key position signal, and performing the following operations according to the key position signal:
if the key position signal is START, continuously monitoring an oil pressure signal, a crankshaft signal and a camshaft signal from the moment when the key position signal is START; otherwise, continuing to monitor the key position signal;
s200, according to the crankshaft signal and the camshaft signal, the following operations are carried out:
if the crankshaft signal does not exist and the camshaft signal exists, outputting a crankshaft abnormal signal;
if the camshaft signal does not exist and the crankshaft signal exists, outputting a camshaft abnormal signal;
if the crankshaft signal does not exist and the camshaft signal does not exist, comparing the engine oil pressure signal with the lower limit value of the normal pressure of the engine oil;
s300, according to the comparison result between the engine oil pressure signal and the engine oil normal pressure lower limit value, the following operations are carried out:
outputting a crankshaft and camshaft abnormality signal if the oil pressure signal exceeds the oil normal pressure lower limit value within an oil pressure stabilization time after the time when the key position signal is received as START;
outputting a starter abnormality signal if the oil pressure signal does not exceed the oil normal pressure lower limit value within an oil pressure stabilization time after the time when the key position signal is received as START.
2. The method of diagnosing engine crankshaft signal and camshaft signal loss of claim 1, wherein: the oil pressure signal is collected by an oil pressure sensor (2) mounted at an outlet end (6) of an oil filter (5) of the engine (1).
3. The method of diagnosing engine crankshaft signal and camshaft signal loss of claim 2, wherein: the crankshaft signal is acquired by a crankshaft speed sensor (3) mounted on a flywheel housing (7) of the engine (1).
4. The method of diagnosing engine crankshaft signal and camshaft signal loss of claim 3, wherein: the camshaft signal is acquired by a camshaft revolution speed sensor (4) mounted on a cylinder head (8) of the engine (1).
5. The method of diagnosing engine crankshaft signal and camshaft signal loss of claim 4, wherein: the engine oil pressure sensor (2), the crankshaft rotating speed sensor (3) and the camshaft rotating speed sensor (4) are respectively connected with an on-vehicle EECU (9) through electric signals.
6. The method of diagnosing engine crankshaft signal and camshaft signal loss of claim 5, wherein: the lower limit value of the normal pressure of the engine oil is manually preset; the engine oil pressure stabilizing time is preset manually.
7. The method of diagnosing engine crankshaft signal and camshaft signal loss of claim 6, wherein: the oil pressure stabilization time was set to 5 seconds.
8. The method of diagnosing engine crankshaft signal and camshaft signal loss of claim 6, wherein: the lower limit value of the normal oil pressure is set to 50 kPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010619750.2A CN111775958B (en) | 2020-06-30 | 2020-06-30 | Method for diagnosing loss of crankshaft signal and camshaft signal of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010619750.2A CN111775958B (en) | 2020-06-30 | 2020-06-30 | Method for diagnosing loss of crankshaft signal and camshaft signal of engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111775958A true CN111775958A (en) | 2020-10-16 |
| CN111775958B CN111775958B (en) | 2021-09-03 |
Family
ID=72761324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010619750.2A Active CN111775958B (en) | 2020-06-30 | 2020-06-30 | Method for diagnosing loss of crankshaft signal and camshaft signal of engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111775958B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796846A (en) * | 2021-02-05 | 2021-05-14 | 联合汽车电子有限公司 | Method, device and equipment for identifying deviation of engine camshaft and storage medium |
| CN113093705A (en) * | 2021-04-02 | 2021-07-09 | 宁夏大学 | Excitation signal generation method and excitation signal generation system |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202451279U (en) * | 2012-01-13 | 2012-09-26 | 浙江吉利汽车研究院有限公司 | Device for reminding potential safety hazard inspection before driving |
| CN203925746U (en) * | 2014-06-17 | 2014-11-05 | 宁波江北瑞利特电子有限公司 | A kind of for petrolic multifunctional monitoring system |
| US20150268063A1 (en) * | 2014-03-21 | 2015-09-24 | IFP Energies Nouvelles | Method of determining the instantaneous angular position of a crankshaft target optimized for starting the engine |
| CN204729173U (en) * | 2015-07-13 | 2015-10-28 | 中国重汽集团济南动力有限公司 | A kind of high pressure common rail electric-controlled engine start trouble-shooter |
| CN105697145A (en) * | 2014-12-15 | 2016-06-22 | 卡特彼勒公司 | In-range sensor fault diagnostic system and method |
| CN107152339A (en) * | 2017-06-30 | 2017-09-12 | 北京联动泰克汽车技术有限公司 | A kind of engine controller detecting system and detection method |
| US20180030913A1 (en) * | 2016-07-29 | 2018-02-01 | Caterpillar Inc. | System for determining piston pin bore wear |
| US20180347493A1 (en) * | 2017-06-06 | 2018-12-06 | Ford Global Technologies, Llc | Thermal engine encapsulation diagnostic |
| CN109884879A (en) * | 2019-03-28 | 2019-06-14 | 潍柴重机股份有限公司 | A kind of method of principal and subordinate ECU to multi-sensor cooperation management |
| CN110486207A (en) * | 2019-09-29 | 2019-11-22 | 潍柴西港新能源动力有限公司 | A kind of method and system that ignition failure detects automatically |
| CN110671204A (en) * | 2019-09-30 | 2020-01-10 | 潍柴动力股份有限公司 | Engine system and control method of engine system |
| CN110873001A (en) * | 2018-09-03 | 2020-03-10 | 马自达汽车株式会社 | Fault diagnosis device for cylinder pressure sensor |
-
2020
- 2020-06-30 CN CN202010619750.2A patent/CN111775958B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202451279U (en) * | 2012-01-13 | 2012-09-26 | 浙江吉利汽车研究院有限公司 | Device for reminding potential safety hazard inspection before driving |
| US20150268063A1 (en) * | 2014-03-21 | 2015-09-24 | IFP Energies Nouvelles | Method of determining the instantaneous angular position of a crankshaft target optimized for starting the engine |
| CN203925746U (en) * | 2014-06-17 | 2014-11-05 | 宁波江北瑞利特电子有限公司 | A kind of for petrolic multifunctional monitoring system |
| CN105697145A (en) * | 2014-12-15 | 2016-06-22 | 卡特彼勒公司 | In-range sensor fault diagnostic system and method |
| CN204729173U (en) * | 2015-07-13 | 2015-10-28 | 中国重汽集团济南动力有限公司 | A kind of high pressure common rail electric-controlled engine start trouble-shooter |
| US20180030913A1 (en) * | 2016-07-29 | 2018-02-01 | Caterpillar Inc. | System for determining piston pin bore wear |
| US20180347493A1 (en) * | 2017-06-06 | 2018-12-06 | Ford Global Technologies, Llc | Thermal engine encapsulation diagnostic |
| CN107152339A (en) * | 2017-06-30 | 2017-09-12 | 北京联动泰克汽车技术有限公司 | A kind of engine controller detecting system and detection method |
| CN110873001A (en) * | 2018-09-03 | 2020-03-10 | 马自达汽车株式会社 | Fault diagnosis device for cylinder pressure sensor |
| CN109884879A (en) * | 2019-03-28 | 2019-06-14 | 潍柴重机股份有限公司 | A kind of method of principal and subordinate ECU to multi-sensor cooperation management |
| CN110486207A (en) * | 2019-09-29 | 2019-11-22 | 潍柴西港新能源动力有限公司 | A kind of method and system that ignition failure detects automatically |
| CN110671204A (en) * | 2019-09-30 | 2020-01-10 | 潍柴动力股份有限公司 | Engine system and control method of engine system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796846A (en) * | 2021-02-05 | 2021-05-14 | 联合汽车电子有限公司 | Method, device and equipment for identifying deviation of engine camshaft and storage medium |
| CN113093705A (en) * | 2021-04-02 | 2021-07-09 | 宁夏大学 | Excitation signal generation method and excitation signal generation system |
| CN113093705B (en) * | 2021-04-02 | 2022-02-11 | 宁夏大学 | Excitation signal generation method and excitation signal generation system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111775958B (en) | 2021-09-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111775958B (en) | Method for diagnosing loss of crankshaft signal and camshaft signal of engine | |
| JP4550358B2 (en) | Method and apparatus for error identification or diagnosis | |
| CN109083756B (en) | Engine air inlet fault detection method and device | |
| US6840222B2 (en) | Method and device for monitoring a fuel system of an internal combustion engine | |
| US8527137B2 (en) | Vehicle behavior data recording control system and recording apparatus | |
| US9140152B2 (en) | Method to diagnose a failure of an OPCJ valve of an internal combustion engine | |
| US9689329B2 (en) | Method for failure detection of injectors in an internal combustion engine, control unit and system for carrying out a method | |
| CN103827468A (en) | Systems and methods for diagnosing an engine | |
| CN103792087A (en) | Parallel trial run fault monitoring and diagnosing method | |
| US10344637B2 (en) | Method of preventing bearing seizure and vehicle using the same | |
| US7197917B2 (en) | Method and apparatus for diagnosing failure of an atmospheric pressure sensor in an engine control system | |
| CN111173603A (en) | Method, device and system for monitoring urea consumption | |
| CN111963298B (en) | Electromagnetic clutch water pump fault detection method and device, controller and vehicle | |
| CN1325883C (en) | Method for diagnosing a noisy failure of a fuel level sensor in a vehicle | |
| CN110107387A (en) | DPF system OBD method for diagnosing faults based on machine oil quality sensor | |
| US20080066522A1 (en) | Method for determining the operability of a pressure sensor | |
| KR100769841B1 (en) | Method for recognizing and correcting errors | |
| EP0785349A2 (en) | Method and unit for diagnosing malfunctioning of the injectors of an internal combustion engine high-pressure injection system | |
| CN113719368A (en) | Stuck fault diagnosis method for mechanical pressure release valve of oil rail and fuel oil system | |
| CN101858266B (en) | Direct injected fuel pump diagnostic systems and methods | |
| WO2014065743A1 (en) | Cylinder diagnosis | |
| CN101576014B (en) | Method for processing failure of engine | |
| KR101567160B1 (en) | Apparatus for the plausibility diagnosis of exhaust pressure sensor amd method for the same | |
| CN108051223B (en) | Engine low-pressure oil way monitoring system and monitoring method | |
| JP2003525392A (en) | Knocking control method for internal combustion engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |