CN1687712A - Method for detecting phases of camshaft and engine in four cylinders motor electromechanical controlled - Google Patents
Method for detecting phases of camshaft and engine in four cylinders motor electromechanical controlled Download PDFInfo
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- CN1687712A CN1687712A CN 200510011662 CN200510011662A CN1687712A CN 1687712 A CN1687712 A CN 1687712A CN 200510011662 CN200510011662 CN 200510011662 CN 200510011662 A CN200510011662 A CN 200510011662A CN 1687712 A CN1687712 A CN 1687712A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000001514 detection method Methods 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000036278 prepulse Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 206010055001 Hypodontia Diseases 0.000 description 1
- 206010002583 anodontia Diseases 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005213 hypodontia Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 201000006680 tooth agenesis Diseases 0.000 description 1
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Abstract
The invention the four-cylinder electric engine camshaft and the engine phase detecting method, and belongs to the electrical diesel engine control relative field. The crank tooth setup adopts the scheme of 28 normal teeth and 2 teeth lack; the camshaft has the normal teeth corresponding to each cylinder the extra 3 multi-teeth that are at the 1/6 between the first cylinder and the second cylinder, the 1/3 position between the second cylinder and the third cylinder normal teeth and the 1/2 position between the third and the forth cylinder normal teeth. Two counters separately count the number of the impulses of the camshaft and the crank; decide the teeth shape corresponding to the present camshaft impulse according to crank counter value to affirm the phase of the engine. The invention greatly reduces the time of the phase detecting.
Description
Technical field
A kind of four-cylinder electric-control motor camshaft and engine method for detecting phases relate to profile of tooth setting and method for detecting phases thereof in the electric-control motor control strategy, belong to electronic controlled diesel control association area.
Background technology
Judge that accurately phase place is the basis of electric-control motor correct execution fuel injection action, judge that fast the engine phase place can shorten engine starting process.Engine generally adopts the eccentric wheel on the camshaft to provide power for oil pump, and bent axle corresponding the open and close order of engine inlet and outlet door, must both cooperatings could realize the normal operation of engine.In the working cycle of engine, camshaft revolves and turns around, crankshaft rotating two circles, and assembly relation mechanically can not be determined both normal sequence of movement, so need to determine by phase-detection the phase relation of camshaft and bent axle in the engine start stage.The electric-control motor method for detecting phases mainly comprises two parts: the profile of tooth (signal panels) of camshaft and bent axle gear ring is provided with and to detection method that should specific profile of tooth.Its process is as follows: sensor is exported high and low level in the square wave accordingly according to projection in camshaft and the bent axle gear ring and depression, this square-wave signal is sent into electronic control unit after processing such as shaping, amplitude limit, detection method can obtain the correct phase of engine according to the specific corresponding relation between camshaft and the bent axle square-wave signal.In the tradition four-cylinder electric-control motor method for detecting phases, bent axle is an one-period with 180 Shaft angles of writing music, in each cycle, uniform cingulum has the multiple tooth or few tooth in a place, camshaft is an one-period with 720 Shaft angles (360 degree camshaft degree) of writing music, and in each cycle, has a place multiple tooth.Fig. 1 is a traditional four-cylinder bent axle and camshaft gear ring profile of tooth figure, the camshaft gear ring is an one-period with a circle (360 degree camshaft degree), in the one-period, 4 orthodonts is arranged, corresponding one of every cylinder, and have one multiple tooth, 1/5 place between the first cylinder orthodont and the second cylinder orthodont is in the bent axle profile of tooth, the corresponding one-period of every half-turn (180 write music Shaft angle), a corresponding cylinder of each cycle has 28 teeth in each cycle, two hypodontias are arranged afterwards.To the detection of phase place is to rely on to distinguish that the multiple tooth of camshaft finish.Elementary tactics is as follows: time interval between adjacent two subpulses of camshaft relatively, if this time interval, promptly think corresponding special multiple tooth of this subpulse less than half of time interval last time, thereby judgement place engine phase place of living in.
In this scheme, the once chance judgement phase place because camshaft whenever turns around, so its longest sense cycle may need 360 degree camshaft degrees, promptly camshaft revolves to turn around and just can detect the engine phase place.The shortcoming of this detection method is that the phase place judgement time is long, thereby has prolonged the engine start time.For addressing this problem, the spy has proposed a kind of new engine detection method.
Summary of the invention
The objective of the invention is to shorten the engine phase-detection time, to accelerate engine starting process.The present invention improves the conventional cam shaft profile of tooth, makes it have the special tooth in many places in a work period, and by matching with the bent axle profile of tooth, can determine the engine phase place in the short period of time.
A kind of four-cylinder electric-control motor camshaft, original scheme is still adopted in the setting of bent axle profile of tooth, and the tooth that promptly has 30 intervals to equate on every half cycle of crankshaft signal dish is removed two adjacent teeth, and 28 orthodonts just lack the scheme of two teeth; Camshaft except keeping the corresponding orthodont of original and every cylinder, multiple tooth 3 places that have been increased to, promptly except 4 orthodonts, also have 3 special multiple tooth; 3 special multiple tooth positions that increase lay respectively at 1/6 place between the first cylinder orthodont and the second cylinder orthodont, the second cylinder orthodont and the 3rd cylinder orthodont 1/3 place, the 3rd cylinder orthodont and the 4th cylinder orthodont 1/2 place.
According to a kind of engine detection method of this profile of tooth, this detection method may further comprise the steps:
(1) two counters being set counts respectively the pulse number of camshaft and the conversion of bent axle square-wave signal;
(2) catch camshaft pulse and CRANK PULSES respectively;
(3) read protruding axle Counter Value when the camshaft counter is 1 by 0 saltus step,, count again the bent axle counter O reset;
(4) read the bent axle Counter Value when the camshaft counter is 2 by 1 saltus step, read the bent axle Counter Value;
This bent axle Counter Value may be 5,23,10,18,15,13,28, shows when the special tooth of corresponding successively first cylinder of prepulse, the second cylinder orthodont, the special tooth of second cylinder, the 3rd cylinder orthodont, the special tooth of the 3rd cylinder, the 4th cylinder orthodont, the first cylinder orthodont;
(5) determine current camshaft pulse according to the bent axle Counter Value, can determine the current phase place of engine after the corresponding profile of tooth.
Compared with prior art, the present invention has shortened the phase-detection time.In the tradition four cylinder electric-control motor detection techniques, because camshaft gear ring one circle has only a special tooth, so may be 720 Shaft angles of writing music its longest detection time, and in this method, since each cylinder correspondence different camshaft profiles of tooth, so revolution is crossed a cylinder and can be determined the engine phase place, promptly its detection time is less than 180 Shaft angles of writing music.
Description of drawings
Fig. 1 is traditional four-cylinder camshaft and bent axle gear ring profile of tooth signal graph;
Fig. 2 is four-cylinder camshaft and bent axle gear ring profile of tooth signal graph described in the present invention;
Fig. 3 is the detection method process flow diagram.
Embodiment
Describe the particular content of the present invention and the course of work in detail below in conjunction with embodiment and accompanying drawing.
Fig. 1 is traditional four-cylinder camshaft and bent axle gear ring profile of tooth figure.As shown in Figure 1, in its camshaft one circle 4 orthodonts are arranged, corresponding one of every cylinder, and have one multiple tooth, 1/5 place between the first cylinder orthodont and the second cylinder orthodont, in the bent axle profile of tooth, the per 180 corresponding one-periods of Shaft angle of writing music have 28 teeth, scarce two teeth.
See Fig. 2, Fig. 2 is four-cylinder camshaft and bent axle gear ring profile of tooth signal graph described in the present invention.The every circle of convexity wheel shaft of the present invention has 4 orthodonts, the corresponding cylinder of per tooth, in addition, also have 3 special teeth, its position lays respectively at 1/6 place between the first cylinder orthodont and the second cylinder orthodont, the second cylinder orthodont and the 3rd cylinder orthodont 1/3 place, the 3rd cylinder orthodont and the 4th cylinder orthodont 1/2 place.Bent axle still adopts scheme shown in Figure 1.
See Fig. 3, be the detection method process flow diagram.Detection method of the present invention comprises camshaft pulse interrupt handling routine and CRANK PULSES interrupt handling routine two parts, also has two counters that two group pulses are counted respectively.Wherein, the CRANK PULSES interrupt handling routine is simpler, enters to interrupt only needing adding 1 to its counter and get final product at every turn.The camshaft pulse interrupt handling routine is complicated, after entering for the first time, earlier with the CRANK PULSES counter O reset, after entering for the second time, read the CRANK PULSES counter values, relatively be decidable engine phase place with standard value again, corresponding relation between standard value and the phase place as shown in FIG., concrete corresponding relation is as follows: standard value may be 5,23,10,18,15,13,28 7 kinds of situations, corresponding successively engine phase place of living in is as follows: the special tooth of first cylinder, the second cylinder orthodont, the special tooth of second cylinder, the 3rd cylinder orthodont, the special tooth of the 3rd cylinder, the 4th cylinder orthodont, the first cylinder orthodont.
The phase-detection process is divided into following three phases:
1. before not detecting camshaft pulse.Bent axle may repeatedly enter the impulse response program because profile of tooth is closeer, at this moment, whenever enters once this responder, and CRANK PULSES counter N2 adds 1.
2. detect for the first time camshaft pulse.After entering this responder, because the camshaft pulse counter is 0, thus the CRANK PULSES counter is clear 0, and the camshaft pulse counter put 1.CRANK PULSES counter is afterwards still finished and is added 1 function at every turn.
3. detect for the second time camshaft pulse.After entering this responder,, read the CRANK PULSES Counter Value, enter comparison program because the camshaft pulse counter is 1.According to comparative result, judge current camshaft pulse phase place of living in.Whole phase place determining program finishes.
With the method detection of engine phase place, can after writing music Shaft angle, engine rotation 180 just determine the engine phase place.And in original scheme, because the special tooth of camshaft has only one, may need to rotate 720 Shaft angles of writing music and could determine the engine phase place so engine is the longest.So scheme can significantly shorten engine phase-detection required time.
Claims (3)
1, a kind of four-cylinder electric-control motor camshaft, original scheme is still adopted in the setting of engine crankshaft profile of tooth, be that the tooth that has 30 intervals to equate on every half cycle of crankshaft signal dish is removed 2 adjacent teeth, 28 orthodonts just, lack the scheme of 2 teeth, it is characterized in that camshaft is except keeping the corresponding orthodont of original and every cylinder, multiple tooth 3 places that have been increased to, promptly except 4 orthodonts, also have 3 special multiple tooth.
2, a kind of electric-control motor camshaft according to claim 1, it is characterized in that, 3 special multiple tooth positions that increase lay respectively at 1/6 place between the first cylinder orthodont and the second cylinder orthodont, the second cylinder orthodont and the 3rd cylinder orthodont 1/3 place, the 3rd cylinder orthodont and the 4th cylinder orthodont 1/2 place.
3, a kind of four-cylinder electric-control motor method for detecting phases according to claim 1 is characterized in that this detection method may further comprise the steps:
(1) 2 counters being set counts respectively the pulse number of camshaft and the conversion of bent axle square-wave signal;
(2) catch camshaft pulse and CRANK PULSES respectively;
(3) read protruding axle Counter Value when the camshaft counter is 1 by 0 saltus step,, count again the bent axle counter O reset;
(4) read the bent axle Counter Value when the camshaft counter is 2 by 1 saltus step, read the bent axle Counter Value;
This value may be 5,23,10,18,15,13,28, shows when the special tooth of corresponding successively first cylinder of prepulse, the second cylinder orthodont, the special tooth of second cylinder, the 3rd cylinder orthodont, the special tooth of the 3rd cylinder, the 4th cylinder orthodont, the first cylinder orthodont;
(5) determine that the current phase place of engine determines current camshaft pulse according to the bent axle Counter Value, can determine the current phase place of engine after the corresponding profile of tooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510011662XA CN1298986C (en) | 2005-04-29 | 2005-04-29 | Method for detecting phases of camshaft and engine in four cylinders motor electromechanical controlled |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200510011662XA CN1298986C (en) | 2005-04-29 | 2005-04-29 | Method for detecting phases of camshaft and engine in four cylinders motor electromechanical controlled |
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| CN1687712A true CN1687712A (en) | 2005-10-26 |
| CN1298986C CN1298986C (en) | 2007-02-07 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101358858B (en) * | 2007-07-31 | 2010-06-16 | 比亚迪股份有限公司 | Detection device and method for crankshaft position sensor |
| CN101968009A (en) * | 2010-09-29 | 2011-02-09 | 镇江恒驰科技有限公司 | Phase detection method of electric control engine |
| CN101387233B (en) * | 2008-10-20 | 2011-04-06 | 奇瑞汽车股份有限公司 | Method for rapidly judging phase of electric-controlled engine system |
| CN104314688A (en) * | 2014-08-13 | 2015-01-28 | 吉林大学 | Device and method for judging rotation phase position and real-time position of engine crankshaft |
| CN108444722A (en) * | 2018-04-04 | 2018-08-24 | 中国重汽集团济南动力有限公司 | A kind of electric-control motor sync detection device and method |
| CN110139978A (en) * | 2016-12-19 | 2019-08-16 | 斯堪尼亚商用车有限公司 | Cylinder detection in quartastroke engine |
| CN110230540A (en) * | 2019-08-06 | 2019-09-13 | 潍柴动力股份有限公司 | A kind of fault determination method and device |
| CN111561414A (en) * | 2020-04-29 | 2020-08-21 | 河南柴油机重工有限责任公司 | Method and device for measuring rotation speed fluctuation of camshaft of high-pressure oil pump |
| CN114576022A (en) * | 2022-03-15 | 2022-06-03 | 中国第一汽车股份有限公司 | Engine angle determination method, device, equipment and storage medium |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2657862B2 (en) * | 1991-09-30 | 1997-09-30 | 富士重工業株式会社 | Crank angle and cylinder determination method for internal combustion engine |
| DE19735720A1 (en) * | 1997-08-18 | 1999-02-25 | Bayerische Motoren Werke Ag | Method for recognizing the combustion stroke of a specific cylinder when starting an internal combustion engine |
| JP3784038B2 (en) * | 1998-03-06 | 2006-06-07 | 株式会社日立製作所 | Engine crank angle detector |
| FR2802242B1 (en) * | 1999-12-10 | 2002-05-10 | Siemens Automotive Sa | METHOD FOR DETERMINING THE MOTOR POSITION AND CORRESPONDING DEVICE |
| US20080172160A1 (en) * | 2003-09-05 | 2008-07-17 | Borgwarner Inc. | Method to measure VCT phase by tracking the absolute angular positions of the camshaft and the crankshaft |
-
2005
- 2005-04-29 CN CNB200510011662XA patent/CN1298986C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101358858B (en) * | 2007-07-31 | 2010-06-16 | 比亚迪股份有限公司 | Detection device and method for crankshaft position sensor |
| CN101387233B (en) * | 2008-10-20 | 2011-04-06 | 奇瑞汽车股份有限公司 | Method for rapidly judging phase of electric-controlled engine system |
| CN101968009A (en) * | 2010-09-29 | 2011-02-09 | 镇江恒驰科技有限公司 | Phase detection method of electric control engine |
| CN104314688A (en) * | 2014-08-13 | 2015-01-28 | 吉林大学 | Device and method for judging rotation phase position and real-time position of engine crankshaft |
| CN104314688B (en) * | 2014-08-13 | 2016-10-05 | 吉林大学 | A kind of device and method judging engine crankshaft rotation phase place and real time position |
| CN110139978A (en) * | 2016-12-19 | 2019-08-16 | 斯堪尼亚商用车有限公司 | Cylinder detection in quartastroke engine |
| US11585287B2 (en) | 2016-12-19 | 2023-02-21 | Scania Cv Ab | Cylinder detection in a four-stroke internal combustion engine |
| CN108444722A (en) * | 2018-04-04 | 2018-08-24 | 中国重汽集团济南动力有限公司 | A kind of electric-control motor sync detection device and method |
| CN108444722B (en) * | 2018-04-04 | 2024-03-29 | 中国重汽集团济南动力有限公司 | Synchronous detection device and method for electric control engine |
| CN110230540A (en) * | 2019-08-06 | 2019-09-13 | 潍柴动力股份有限公司 | A kind of fault determination method and device |
| CN111561414A (en) * | 2020-04-29 | 2020-08-21 | 河南柴油机重工有限责任公司 | Method and device for measuring rotation speed fluctuation of camshaft of high-pressure oil pump |
| CN114576022A (en) * | 2022-03-15 | 2022-06-03 | 中国第一汽车股份有限公司 | Engine angle determination method, device, equipment and storage medium |
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| CN1298986C (en) | 2007-02-07 |
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