CN106837576A - A kind of fault detection system and detection method of vehicle crank axle position sensor signal - Google Patents
A kind of fault detection system and detection method of vehicle crank axle position sensor signal Download PDFInfo
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- CN106837576A CN106837576A CN201710059480.2A CN201710059480A CN106837576A CN 106837576 A CN106837576 A CN 106837576A CN 201710059480 A CN201710059480 A CN 201710059480A CN 106837576 A CN106837576 A CN 106837576A
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- China
- Prior art keywords
- signal
- position sensor
- camshaft
- target wheel
- crankshaft
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The present invention relates to a kind of fault detection system of vehicle crank axle position sensor signal, mainly it is made up of camshaft, phase detector, bent axle target wheel, crankshaft position sensor and ECU controllers, fault detect is carried out to CRANK SENSOR by particular procedure step.The corresponding detection method of the detecting system is further related to, is concretely comprised the following steps：Respectively by crankshaft position sensor and phase detector collecting crankshaft position signalling and camshaft-position signal, the signal of collection enters ECU controllers；Monitoring engine minimum speed condition；Camshaft tooth phase is calculated along triggering times；Assessment crankshaft signal, signal fault confirms.The fault detection system and method for vehicle crank axle position sensor signal of the present invention are simple and reliable, can exactly detect CRANK SENSOR failure, it is adaptable to while configuring the vehicle of bent axle and camshaft.
Description
Technical field
The invention belongs to automotive electronics diagnostic techniques field, and in particular to a kind of vehicle crank axle position sensor signal
Fault detection system and detection method, it is adaptable to the vehicle of crankshaft position sensor and phase detector is installed, for monitoring
Whether crankshaft-position signal is lost.
Background technology
In view of importance of the crankshaft position sensor in engine electric-controlled system, therefore either regulation is still tieed up after sale
Repair, the requirement of Precise Diagnosis is all proposed to crankshaft position sensor.The diagnosis of crankshaft position sensor and phase target wheel structure,
Diagnosis implementation method and software configuration have compared with Important Relations.
At present, or the diagnostic system of crankshaft position sensor is excessively simple and unreliable, otherwise based on complicated algorithm without
Method obtains concrete application in engineering.Therefore, research and develop a kind of simple and reliable diagnostic system and corresponding detection method are very
It is necessary.
The content of the invention
The purpose of the present invention is that for above-mentioned the deficiencies in the prior art, there is provided a kind of vehicle crank axle position sensor
The fault detection system and detection method of signal, are diagnosed using phase detector signal to crankshaft position sensor, diagnosis
Simple system and reliability.
The purpose of the present invention is achieved through the following technical solutions, as follows in conjunction with illustrating：
A kind of fault detection system of vehicle crank axle position sensor signal, mainly by camshaft 1, phase detector 2,
Bent axle target wheel 3, crankshaft position sensor 4 and ECU controllers 6 are constituted；Wherein phase detector 2 is arranged close to the target of camshaft 1
The position of wheel, crankshaft position sensor 4 is arranged close to the position of bent axle target wheel 3, phase detector 2 and crankshaft position sensor
4 and ECU controllers 6 are connected；
The phase detector 2 is used to gather the position signalling of camshaft 1, and the signal of collection is supplied to ECU controls
Device 6；The crankshaft position sensor 4 is used for the positional information of collecting crankshaft target wheel 3, and is supplied to ECU to control the signal of collection
Device processed 6；The ECU controllers 6 are used to process camshaft signal and crankshaft-position signal, and are judged according to camshaft signal feature
Whether crankshaft position sensor 4 breaks down.
A kind of fault detection method of vehicle crank axle position sensor signal, specifically includes following steps：
A, believed by crankshaft position sensor 4 and the collecting crankshaft position signalling of phase detector 2 and camshaft location respectively
Number, the signal of collection enters ECU controllers 6；
B, monitoring engine minimum speed condition；
C, calculating camshaft tooth phase are along triggering times：When engine speed is less than minimum speed, a counting is designed
Device B, for calculating number of times of the camshaft tooth phase along triggering, often collects a tooth phase along trigger signal, and counter B adds up
1；
D, assessment crankshaft signal, signal fault confirm：As counter B is counted more than or equal to 8 times along triggering, then bent axle is assessed
Signal, if bent axle target wheel signal is still not changed in, you can confirm that current crankshaft sensor occurs dropout failure.
Step B, the monitoring engine minimum speed condition is specially：Monitoring minimum bent axle target wheel space of teeth time or prison
The Counter Value of anodontia interruption is controlled, the wherein bent axle target wheel space of teeth time refers to ECU controllers 6 in the upper of each bent axle target wheel tooth
When rising edge or trailing edge triggering interruption, the interval time between interrupting twice.
The monitoring minimum bent axle target wheel space of teeth time concretely comprises the following steps：
B1, the crankshaft-position signal calculating minimum bent axle target wheel space of teeth time according to collection, by ECU controllers 6
Shift register store nearest three target wheel space of teeth time, and temporally from as far as near principle, be set to T, T1 and
T2；
B2, minimum tooth interval time can be calculated by minimum speed,
Wherein minimum speed is set to 20 revs/min, and the total number of teeth of bent axle target wheel is 60；
B3, when T and T1 exceed minimum tooth interval time, you can think that engine speed, less than minimum speed, meets
Minimum speed condition.
The Counter Value of the anodontia interruption of the monitoring is concretely comprised the following steps：One counter A of design, is used to count and does not occur
The duration that tooth is interrupted, every 10 milliseconds cumulative 1, if interrupted without generation tooth in 50 milliseconds, you can think engine speed
Less than 20 revs/min of minimum speed, minimum speed condition is met；Period interrupts then counter clear 0 in the event of tooth, it is believed that engine
It is unsatisfactory for minimum speed condition；Corresponding 20 revs/min of the minimum speed in wherein 50 milliseconds spaces of teeth, the bent axle target wheel number of teeth 60, correspondence
Counter Value is 5.
Compared with prior art, the beneficial effects of the present invention are：The existing technology to crankshaft position sensor diagnosis, all
It is to be based purely on crankshaft-position signal itself, is judged by complicated algorithm, reliability and engineering practicability is not enough.This hair
The bright present situation that camshaft is each equipped with based on most vehicles is ingenious to carry out auxiliary diagnosis, failure with camshaft signal
Advantageously, algorithm is succinct and does not increase cost, and reliability and engineering practicability are higher for feature extraction.
Brief description of the drawings
Fig. 1 is the fault detection system schematic diagram of vehicle crank axle position sensor signal of the present invention；
Fig. 2 is fault detection signal schematic diagram.
In figure, the 1. crank position of the 1st tooth trailing edge 4. after the hypodontia of 2. phase detector of camshaft, 3. bent axle target wheel 5.
The camshafts the 4th of I the 1st tooth of camshafts of sensor 6.ECU controllers, II III the 3rd tooth of camshafts of the 2nd tooth of camshafts IV
Tooth.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of fault detection system of vehicle crank axle position sensor signal, mainly by camshaft 1, phase
Level sensor 2, bent axle target wheel 3, crankshaft position sensor 4 and ECU controllers 6 are constituted；
The phase detector 2 is used to gather the position signalling of camshaft 1, and the signal of collection is supplied to ECU controls
Device 6；The crankshaft position sensor 4 is used for the positional information of collecting crankshaft target wheel 3, and is supplied to ECU to control the signal of collection
Device processed 6；The ECU controllers are used to process camshaft signal and crankshaft-position signal, and are judged according to camshaft signal feature
Whether crankshaft position sensor 4 breaks down.
Installing and using fault detection system has following premise：
1st, the fault-free of phase detector 2 is required；
2nd, the installation site requirement of camshaft 1, phase detector 2, bent axle target wheel 3 and crankshaft position sensor 4 is correct.It is bent
First tooth trailing edge is that (reference point of correspondence camshaft 1 is in the interposition of the 1st tooth of camshaft I for 5- reference points after the hypodontia of axle target wheel 3
Put, i.e., when ECU controllers 6 detect the reference point of bent axle target wheel 3, it should be detected simultaneously by camshaft 1 and be also at camshaft 1 joining
Examination point), the installation site of crankshaft position sensor 4 is 114 ° with reference up time pin mark angle, the installation site of corresponding phase sensor 2
It it is 54 ° with the reference point angle clockwise of camshaft 1；
3rd, along the rising edge or trailing edge that can use camshaft tooth, the present invention use the upper of camshaft tooth to tooth phase
Rise edge.
A kind of fault detection method of vehicle crank axle position sensor signal, specifically includes following steps：
A, respectively by crankshaft position sensor and phase detector collecting crankshaft position signalling and camshaft-position signal,
The signal of collection enters ECU controllers；
B, monitoring engine minimum speed condition；
C, calculating camshaft tooth phase are along triggering times：(now can tentatively recognize when engine speed is less than minimum speed
It is crankshaft position sensor no signal), a counter B is designed, for calculating number of times of the camshaft tooth phase along triggering, often adopt
Collect a tooth phase along trigger signal, counter B cumulative 1；
D, assessment crankshaft signal, signal fault confirm：If counter B is counted more than or equal to 8 times, and (it is convex that number of times is based on standard
Wheel shaft determines) along triggering, then crankshaft signal is assessed, if bent axle target wheel signal is still not changed in, you can and front crankshaft is worked as in confirmation
There is dropout failure in sensor.
Step B, monitoring engine minimum speed condition has two methods, meets one i.e. it is believed that minimum speed condition expires
Foot.
1) the minimum bent axle target wheel space of teeth time is monitored.ECU controllers 6 can each bent axle target wheel tooth rising edge or under
Drop is interrupted along triggering, and the interval time between interrupting twice is exactly the bent axle target wheel space of teeth time.According to the crank position of collection
The signal of change minimum bent axle target wheel space of teeth time, nearest three target wheel teeth are stored by the shift register in ECU controllers 6
Interval time (according to the time from as far as near principle, respectively T, T1, T2), it is used to monitor engine minimum speed condition.Most
The small space of teeth time can be calculated by minimum speed,It is wherein minimum to turn
Speed can be set to 20 revs/min, and the total number of teeth of bent axle target wheel of the present invention is 60.When T and T1 are more than minimum tooth interval time, i.e.,
It is believed that engine speed is less than minimum speed, minimum speed condition is met.
2) Counter Value of anodontia interruption is monitored.One counter A of design, be used to count do not occur tooth interruption it is lasting when
Between, every 10 milliseconds cumulative 1, if 50 milliseconds (corresponding 20 revs/min of the minimum speed in 50 milliseconds of spaces of teeth, the bent axle target wheel number of teeth 60,
Correspondence Counter Value is to interrupt without there is tooth in 5), you can think that engine speed, less than 20 revs/min of minimum speed, meets most
Small speed conditions.Period interrupts then counter clear 0 in the event of tooth, it is believed that engine is unsatisfactory for minimum speed condition.
As shown in Fig. 2 as minimum speed condition is set up, camshaft 1 is rotated, the collection camshaft tooth phase of ECU controllers 6
Along trigger signal, and by counter B counter cams axle tooth phase along triggering times, when counter B is more than or equal to 8 times and bent axle
Signal is unchanged, confirms that current crankshaft position sensor occurs dropout failure.
Claims (5)
1. a kind of fault detection system of vehicle crank axle position sensor signal, it is characterised in that：It is main by camshaft (1),
Phase detector (2), bent axle target wheel (3), crankshaft position sensor (4) and ECU controllers (6) are constituted；Wherein phase detector
(2) position of camshaft (1) target wheel is arranged close to, crankshaft position sensor (4) is arranged close to the position of bent axle target wheel (3)
Put, phase detector (2) and crankshaft position sensor (4) and ECU controllers (6) are connected；
The signal of collection is supplied to ECU controls by the phase detector (2) for gathering the position signalling of camshaft (1)
Device (6)；The crankshaft position sensor (4) for collecting crankshaft target wheel (3) positional information, and collection signal be supplied to
ECU controllers (6)；The ECU controllers (6) are believed for processing camshaft signal and crankshaft-position signal according to camshaft
Number feature judges whether crankshaft position sensor (4) breaks down.
2. a kind of fault detection method of vehicle crank axle position sensor signal, specifically includes following steps：
A, respectively by crankshaft position sensor (4) and phase detector (2) collecting crankshaft position signalling and camshaft location letter
Number, the signal of collection enters ECU controllers (6)；
B, monitoring engine minimum speed condition；
C, calculating camshaft tooth phase are along triggering times：When engine speed is less than minimum speed, a counter B is designed,
For calculating number of times of the camshaft tooth phase along triggering, a tooth phase is often collected along trigger signal, counter B cumulative 1；
D, assessment crankshaft signal, signal fault confirm：If counter B is counted more than or equal to 8 times along triggering, assessment bent axle letter
Number, such as bent axle target wheel signal is still not changed in, you can confirm that current crankshaft sensor occurs dropout failure.
3. a kind of fault detection method of vehicle crank axle position sensor signal according to claim 2, its feature exists
In step B, the monitoring engine minimum speed condition is specially：Monitoring minimum bent axle target wheel space of teeth time or monitoring nothing
The Counter Value that tooth is interrupted, the wherein bent axle target wheel space of teeth time refers to rising of the ECU controllers (6) in each bent axle target wheel tooth
When edge or trailing edge triggering are interrupted, the interval time between interrupting twice.
4. a kind of fault detection method of vehicle crank axle position sensor signal according to claim 3, its feature exists
In described to monitor concretely comprising the following steps for minimum bent axle target wheel space of teeth time：
B1, the crankshaft-position signal calculating minimum bent axle target wheel space of teeth time according to collection, by ECU controllers (6)
Shift register stores the nearest three target wheel space of teeth time, and is temporally set to T, T1 and T2 from as far as near principle；
B2, minimum tooth interval time can be calculated by minimum speed,Its
Middle minimum speed is set to 20 revs/min, and the total number of teeth of bent axle target wheel is 60；
B3, when T and T1 exceed minimum tooth interval time, you can think engine speed less than minimum speed, meet minimum
Speed conditions.
5. a kind of fault detection method of vehicle crank axle position sensor signal according to claim 3, its feature exists
In concretely comprising the following steps for, the Counter Value of the anodontia interruption of the monitoring：One counter A of design, in being used to count tooth not occurring
The disconnected duration, every 10 milliseconds cumulative 1, if interrupted without generation tooth in 50 milliseconds, you can think that engine speed is less than
20 revs/min of minimum speed, meets minimum speed condition；Period interrupts then counter clear 0 in the event of tooth, it is believed that engine is discontented with
Sufficient minimum speed condition；Corresponding 20 revs/min of the minimum speed in wherein 50 milliseconds spaces of teeth, the bent axle target wheel number of teeth 60, correspondence is counted
Device value is 5.
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| CN201710059480.2A CN106837576A (en) | 2017-01-24 | 2017-01-24 | A kind of fault detection system and detection method of vehicle crank axle position sensor signal |
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| CN201710059480.2A CN106837576A (en) | 2017-01-24 | 2017-01-24 | A kind of fault detection system and detection method of vehicle crank axle position sensor signal |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443771A (en) * | 2018-10-11 | 2019-03-08 | 曾凡荣 | Waveform generation method, device, terminal and readable storage medium storing program for executing |
| CN110553578A (en) * | 2019-09-06 | 2019-12-10 | 沪东重机有限公司 | Measuring device for crankshaft angle signal of marine low-speed diesel engine |
| CN111120177A (en) * | 2019-12-25 | 2020-05-08 | 潍柴动力股份有限公司 | Starting method, device, system and equipment of engine |
| CN112523864A (en) * | 2020-11-20 | 2021-03-19 | 浙江吉利控股集团有限公司 | Diagnosis method and device for engine crankshaft position sensor and storage medium |
| CN117906682A (en) * | 2024-01-24 | 2024-04-19 | 罡阳轴研科技(灌云)有限公司 | Method and system for detecting position and rotation speed of motorcycle crankshaft |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1643242A (en) * | 2002-09-30 | 2005-07-20 | 洋马株式会社 | Device for discriminating engine crank angle |
| JP2011002383A (en) * | 2009-06-19 | 2011-01-06 | Toyota Motor Corp | Abnormality detector for rotation sensor |
| CN101994590A (en) * | 2010-09-15 | 2011-03-30 | 中国第一汽车集团公司 | Diesel timing control system based on state machine and time processing unit |
| CN102822484A (en) * | 2010-03-31 | 2012-12-12 | 罗伯特·博世有限公司 | Circuit arrangement and method for evaluating signals of crankshaft sensor and of camshaft sensor of internal combustion engine |
| US20130006496A1 (en) * | 2011-06-28 | 2013-01-03 | GM Global Technology Operations LLC | System and method for calibrating engine crankshaft-camshaft correlation and for improved vehicle limp-home mode |
| CN105781766A (en) * | 2015-01-09 | 2016-07-20 | 丰田自动车株式会社 | Malfunction Diagnosis Device For Crank-angle Sensor, And Malfunction Diagnosis Method For Crank-angle Sensor |
-
2017
- 2017-01-24 CN CN201710059480.2A patent/CN106837576A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1643242A (en) * | 2002-09-30 | 2005-07-20 | 洋马株式会社 | Device for discriminating engine crank angle |
| JP2011002383A (en) * | 2009-06-19 | 2011-01-06 | Toyota Motor Corp | Abnormality detector for rotation sensor |
| CN102822484A (en) * | 2010-03-31 | 2012-12-12 | 罗伯特·博世有限公司 | Circuit arrangement and method for evaluating signals of crankshaft sensor and of camshaft sensor of internal combustion engine |
| CN101994590A (en) * | 2010-09-15 | 2011-03-30 | 中国第一汽车集团公司 | Diesel timing control system based on state machine and time processing unit |
| US20130006496A1 (en) * | 2011-06-28 | 2013-01-03 | GM Global Technology Operations LLC | System and method for calibrating engine crankshaft-camshaft correlation and for improved vehicle limp-home mode |
| CN105781766A (en) * | 2015-01-09 | 2016-07-20 | 丰田自动车株式会社 | Malfunction Diagnosis Device For Crank-angle Sensor, And Malfunction Diagnosis Method For Crank-angle Sensor |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443771A (en) * | 2018-10-11 | 2019-03-08 | 曾凡荣 | Waveform generation method, device, terminal and readable storage medium storing program for executing |
| CN110553578A (en) * | 2019-09-06 | 2019-12-10 | 沪东重机有限公司 | Measuring device for crankshaft angle signal of marine low-speed diesel engine |
| CN111120177A (en) * | 2019-12-25 | 2020-05-08 | 潍柴动力股份有限公司 | Starting method, device, system and equipment of engine |
| CN111120177B (en) * | 2019-12-25 | 2022-04-05 | 潍柴动力股份有限公司 | Starting method, device, system and equipment of engine |
| CN112523864A (en) * | 2020-11-20 | 2021-03-19 | 浙江吉利控股集团有限公司 | Diagnosis method and device for engine crankshaft position sensor and storage medium |
| CN117906682A (en) * | 2024-01-24 | 2024-04-19 | 罡阳轴研科技(灌云)有限公司 | Method and system for detecting position and rotation speed of motorcycle crankshaft |
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Application publication date: 20170613 |