CN101441133B - Diagnostic method of automobile crankshaft sensor signal - Google Patents
Diagnostic method of automobile crankshaft sensor signal Download PDFInfo
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Abstract
The invention relates to a method for diagnosing signal of an automotive crankshaft sensor, which belongs to the technical field of automotive electronics, comprising: continuously collecting a first average value of voltage signals of an automotive battery, calculating difference of two adjacent first average values, and setting the threshold, comparing the difference of the collected average value with the threshold, if the difference is in the threshold range, and determining initiatively that the automotive engine is in starting state; continuously collecting a second average value of voltage signals of the automotive battery, and setting the threshold, comparing the difference of the collected average value with the threshold, if the difference is in the threshold range, and determining that the automotive engine is in starting state. An ECU confirms in-timely whether the crankshaft sensor works normally according to the level signal of the crankshaft sensor. The method, utilizing voltage changes of battery in the starting process of the engine for realizing signal diagnosis of the crankshaft sensor without changing the prior ECU hardware, is suitable for engine systems equipped with phase sensors and engine systems without phase sensors.
Description
Technical field
The present invention relates to a kind of diagnostic method of automobile crane sensor signal, belong to technical field of automotive electronics.
Background technology
Engine management system (hereinafter to be referred as EMS) for an automobile, the crankshaft sensor signal is most important, it is the basis of whole engine control algorithm, directly reacted engine speed information, nearly all control algolithm to engine management system all needs engine speed as basic input quantity.Therefore, fault diagnosis for the crankshaft sensor signal of direct reaction engine speed information just seems very necessary, EMS must in time diagnose out the unusual of crankshaft sensor output signal, and in time control engine and enter in the corresponding fault mode, could guarantee the safety of vehicle when crankshaft sensor damages like this, can in time remind the driver that crankshaft sensor is repaired or replaced simultaneously.
Among present most of automobile EMS, be to realize by comparison with the phase detector output signal for the diagnosis of crankshaft sensor signal.Behind engine start, crankshaft sensor and phase detector output signal are the high-low level variation with the rotation of crankshaft signal dish and camshaft respectively, and enter the trapping module that vehicle electronic control unit (hereinafter to be referred as ECU) is gone up single-chip microcomputer, recognize the high-low level variation of crankshaft sensor and phase detector signal as ECU after, promptly carry out " synchronously " operation, determine the basic point of engine sequential, and control the oil spout and the ignition order of engine thus.In this process, as it is normal to recognize phase detector output signal high-low level, but simultaneously, the crankshaft sensor signal that collects does not have high-low level to change (promptly total high level or low level of keeping), and through after a while " anti-tremble " process, then judge the crankshaft sensor abnormal signal, and light the vehicle trouble lamp.
Increasing engine electric-controlled system, from saving the angle of cost, simplification engine design, phased out phase detector, only utilize crankshaft sensor to carry out engine " sequential " and calculate (being designated hereinafter simply as the non-phase sensor system), traditional like this crankshaft sensor signal diagnostic method is just no longer suitable.
Summary of the invention
The objective of the invention is to propose a kind of diagnostic method of crankshaft sensor signal, need not the cooperation of phase detector signal, just can be after engine start promptly and accurately the diagnosis of finishing crankshaft signal, make it go for traditional have phase detector engine system and novel non-phase sensor engine system.
The diagnostic method of the automobile crane sensor signal that the present invention proposes may further comprise the steps:
(1) voltage signal of continuous acquisition automobile storage battery is got the mean value of the voltage signal of continuous acquisition, as first mean value, calculates the difference of adjacent twice first mean values;
(2) set the threshold value of the first mean value difference and the threshold value of the second mean value difference, the threshold value of the first mean value difference of the difference of adjacent twice first mean values and setting is compared, if the difference of first mean value is in the threshold range of the first mean value difference, determine tentatively that then motor car engine is in starting state, if the difference of first mean value is not in the threshold range of the first mean value difference, then repeating step (1) and (2) determine that until preliminary motor car engine is in starting state;
(3) voltage signal of continuous acquisition automobile storage battery, get the mean value of the voltage signal of continuous acquisition, as second mean value, calculate the difference of adjacent twice second mean values, after the continuous acquisition setting-up time section, with the threshold ratio of the second mean value difference of the difference of last adjacent twice second mean values and setting, if the difference of second mean value is in the threshold range of the second mean value difference, determine that then motor car engine is in starting state, if the difference of second mean value is not in the threshold range of the second mean value difference, then repeating step (1) and (2) are in starting state until definite motor car engine;
(4) the per 1 millisecond of level signal to crankshaft sensor output of vehicle electronic control unit is confirmed, if level signal is a square-wave signal, confirm that then crankshaft sensor is working properly, if level signal is lasting high level or lasting low level in the setting-up time section, then confirm the crankshaft sensor operational failure, and light the vehicle trouble lamp.
The diagnostic method of the crankshaft sensor signal that the present invention proposes, its advantage is: utilize the variation of battery tension in the engine start process (VB), realize the diagnosis of crankshaft sensor signal.Compare with traditional crankshaft sensor signal diagnostic method, need not the cooperation of phase detector signal, need not change original ECU hardware, only need increase respective algorithms, go for traditional have phase detector engine system and novel non-phase sensor engine system.
Description of drawings
Fig. 1 is the FB(flow block) of the inventive method.
Fig. 2 is that the battery tension signal of gathering in the inventive method changes synoptic diagram.
Embodiment
The diagnostic method of the automobile crane sensor signal that the present invention proposes, its FB(flow block) may further comprise the steps as shown in Figure 1:
(1) voltage signal of continuous acquisition automobile storage battery is got the mean value of the voltage signal of continuous acquisition, as first mean value, calculates the difference of adjacent twice first mean values;
(2) set the threshold value of the first mean value difference and the threshold value of the second mean value difference, the threshold value of the first mean value difference of the difference of adjacent twice first mean values and setting is compared, if the difference of first mean value is in the threshold range of the first mean value difference, determine tentatively that then motor car engine is in starting state, if the difference of first mean value is not in the threshold range of the first mean value difference, then repeating step (1) and (2) determine that until preliminary motor car engine is in starting state;
(3) voltage signal of continuous acquisition automobile storage battery, get the mean value of the voltage signal of continuous acquisition, as second mean value, calculate the difference of adjacent twice second mean values, after the continuous acquisition setting-up time section, with the threshold ratio of the second mean value difference of the difference of last adjacent twice second mean values and setting, if the difference of second mean value is in the threshold range of the second mean value difference, determine that then motor car engine is in starting state, if the difference of second mean value is not in the threshold range of the second mean value difference, then repeating step (1) and (2) are in starting state until definite motor car engine;
(4) the per 1 millisecond of level signal to crankshaft sensor output of ECU is confirmed, if level signal is a square-wave signal, confirm that then crankshaft sensor is working properly, if level signal is lasting high level or lasting low level in the setting-up time section, then confirm the crankshaft sensor operational failure, and light the vehicle trouble lamp.
Fig. 2 is that the battery tension signal of gathering in the inventive method changes synoptic diagram.The I district powers on for engine but VB state when not starting among Fig. 2; After II district and III district are starting, drag the VB state of engine process; VB state when the IV district is the starting process end.
The voltage signal of continuous acquisition automobile storage battery, get the mean value of continuous acquisition voltage signal, as first mean value, and calculate the difference of adjacent twice first mean values, the difference of judging above-mentioned first mean value is in the threshold range of the first mean value difference of setting, determine tentatively that then engine is in starting state, promptly among Fig. 2 shown in the A in the II district point.
The voltage signal of continuous acquisition automobile storage battery, get the mean value of continuous acquisition voltage signal, as second mean value, and calculate the difference of adjacent twice second mean values, after the continuous acquisition setting-up time section, i.e. the B point of II district and III district intersection among Fig. 2, with the threshold ratio of the second mean value difference of the difference of last adjacent twice second mean values and setting, if the difference of above-mentioned second mean value is in the threshold range of the second mean value difference, determine that then motor car engine is in starting state.
After determining that motor car engine is in starting state, in the setting-up time section, be among Fig. 2 shown in the III district, the per 1 millisecond of level signal to crankshaft sensor output of automobile electronic control unit is confirmed, if level signal is a square-wave signal, confirm that then crankshaft sensor is working properly, enter corresponding sequential " synchronously " handling procedure; If level signal is then confirmed the crankshaft sensor operational failure, and is lighted the vehicle trouble lamp for continuing high level or lasting low level.
For protection, if engine continues can't to find effective crankshaft sensor signal after starting a period of time always, then finish this time starting process, promptly among Fig. 2 shown in the IV district to starter motor.
Claims (1)
1. the diagnostic method of an automobile crane sensor signal is characterized in that this method may further comprise the steps:
(1) voltage signal of continuous acquisition automobile storage battery is got first mean value of the voltage signal of continuous acquisition, calculates the difference of adjacent twice first mean values;
(2) threshold value of the setting first mean value difference, the threshold value of the first mean value difference of the difference of above-mentioned first mean value and setting is compared, if the difference of above-mentioned first mean value is in the threshold range of the first mean value difference, determine tentatively that then motor car engine is in starting state, if the difference of above-mentioned first mean value is not in the threshold range of the first mean value difference, then repeating step (1) and (2) determine that until preliminary motor car engine is in starting state;
(3) voltage signal of continuous acquisition automobile storage battery, get second mean value of the voltage signal of continuous acquisition, calculate the difference of adjacent twice second mean values, after the continuous acquisition setting-up time section, with the threshold ratio of the second mean value difference of the difference of last adjacent twice second mean values and setting, if the difference of above-mentioned second mean value is in the threshold range of the second mean value difference, determine that then motor car engine is in starting state, if the difference of above-mentioned second mean value is not in the threshold range of the second mean value difference, repeating step (1) then, (2) and (3), be in starting state until definite motor car engine;
(4) the per 1 millisecond of level signal to crankshaft sensor output of automobile electronic control unit is confirmed, if level signal is a square-wave signal, confirm that then crankshaft sensor is working properly, if level signal is lasting high level or lasting low level in the setting-up time section, then confirm the crankshaft sensor operational failure, and light the vehicle trouble lamp.
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| CN2008102391930A CN101441133B (en) | 2008-12-12 | 2008-12-12 | Diagnostic method of automobile crankshaft sensor signal |
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| CN2008102391930A CN101441133B (en) | 2008-12-12 | 2008-12-12 | Diagnostic method of automobile crankshaft sensor signal |
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| CN101441133B true CN101441133B (en) | 2010-06-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104863735B (en) * | 2014-02-21 | 2017-12-01 | 北京因极技术有限公司 | Automatically controlled explosive motor timing signal trouble-shooter |
| US9194321B1 (en) * | 2014-08-27 | 2015-11-24 | GM Global Technology Operations LLC | System and method for diagnosing a fault in a camshaft position sensor and/or a crankshaft position sensor |
| CN110118664B (en) * | 2019-06-17 | 2024-11-19 | 云致科技(天津)有限公司 | Device for analyzing the working status of engineering vehicles based on battery voltage |
| CN110597214B (en) * | 2019-09-26 | 2021-02-12 | 中冶赛迪重庆信息技术有限公司 | Operation action amount recognition method, system storage medium and electronic terminal |
| CN114922731A (en) * | 2022-05-09 | 2022-08-19 | 潍柴动力股份有限公司 | Detection method, device and electronic equipment for fault of crankshaft/camshaft signal missing |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1441158A (en) * | 2002-02-26 | 2003-09-10 | 株式会社电装 | Engine control equipment |
| CN2856961Y (en) * | 2005-12-30 | 2007-01-10 | 浙江博德汽车电子股份有限公司 | Detector of engine control cell |
| CN101196430A (en) * | 2006-12-05 | 2008-06-11 | 上海电气集团股份有限公司 | Electric Control System of Crankshaft Rotor-Bearing System Dynamics Experiment Bench |
| CN101196431A (en) * | 2006-12-05 | 2008-06-11 | 上海电气集团股份有限公司 | Test device for crankshaft rotor-bearing dynamics test bench |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1441158A (en) * | 2002-02-26 | 2003-09-10 | 株式会社电装 | Engine control equipment |
| CN2856961Y (en) * | 2005-12-30 | 2007-01-10 | 浙江博德汽车电子股份有限公司 | Detector of engine control cell |
| CN101196430A (en) * | 2006-12-05 | 2008-06-11 | 上海电气集团股份有限公司 | Electric Control System of Crankshaft Rotor-Bearing System Dynamics Experiment Bench |
| CN101196431A (en) * | 2006-12-05 | 2008-06-11 | 上海电气集团股份有限公司 | Test device for crankshaft rotor-bearing dynamics test bench |
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Owner name: TIANJIN RUIYITAIKE CAR ELECTRIC CO., LTD. Free format text: FORMER OWNER: BEIJING RUIYI TAIKE CAR ELECTRONICS CO., LTD. Effective date: 20090710 |
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Denomination of invention: Diagnostic method of automobile crankshaft sensor signal Effective date of registration: 20101018 Granted publication date: 20100623 Pledgee: Pudong Shanghai Development Bank Limited by Share Ltd Tianjin branch Pledgor: Tianjin Troitec Automotive Electronics Co., Ltd. Registration number: 2010990000915 |
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Denomination of invention: Diagnostic method of automobile crankshaft sensor signal Effective date of registration: 20120820 Granted publication date: 20100623 Pledgee: Bank of China, Limited by Share Ltd, Tianjin, Xiqing branch Pledgor: Tianjin Troitec Automotive Electronics Co., Ltd. Registration number: 2012990000455 |
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Denomination of invention: Diagnostic method of automobile crankshaft sensor signal Effective date of registration: 20131108 Granted publication date: 20100623 Pledgee: Bank of Shanghai Limited by Share Ltd Tianjin branch Pledgor: Tianjin Troitec Automotive Electronics Co., Ltd. Registration number: 2013120000048 |
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