CN101210522B - Signal disc and engine cylinder sequence distinguishing device and method containing the same - Google Patents
Signal disc and engine cylinder sequence distinguishing device and method containing the same Download PDFInfo
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- CN101210522B CN101210522B CN200610167388XA CN200610167388A CN101210522B CN 101210522 B CN101210522 B CN 101210522B CN 200610167388X A CN200610167388X A CN 200610167388XA CN 200610167388 A CN200610167388 A CN 200610167388A CN 101210522 B CN101210522 B CN 101210522B
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Abstract
Disclosed is a signal panel installed on a camshaft of an engine and a device and a method of discriminating the order of cylinders including the signal panel, wherein the outer circumference of the signal panel is provided with a plurality of protrusions with the same structure equispacedly along the circumferential direction, and one lateral side surface of the signal panel is provided with a plurality of differentiation devices which are corresponding to each protrusion and are used differentiate the heaves and which may be with or without flanges. The device and the method of discriminating the order of cylinders provided by the invention overcomes disadvantages of a prior device such as a complicated structure, and provides the signal panel and the device and the method of discriminating the order of cylinders including the signal panel by utilizing the signal panel of the invention.
Description
Technical field
The present invention relates to engine art, relate in particular to a kind of signal panel and the engine cylinder sequence discriminating gear and the method for discrimination that comprise these signal panel.
Background technique
The work cycle of motor comprises a series of working stroke, as two or four.At present, for the multicylinder engine that has adopted control unit of engine (ECU), its electronically controlled gasoline injection (EFI) and ECI Electronic Controlled Ignition shift to an earlier date (ESA) unit the time to be needed all which stroke each cylinder is in engine start and running and judges, so that accurately control the time and the order of oil spout and igniting.
According to prior art, the method and apparatus that has many kinds of cylinder sequences to judge.As publication number is disclosed four-cylinder electric-control motor camshaft and the motor method for detecting phases of CN1687712A, and its camshaft signal dish comprises that corresponding with 4 cylinders 4 orthodonts and position correspond respectively between the first cylinder orthodont and the second cylinder orthodont between 1/6 place, the second cylinder orthodont and the 3rd cylinder orthodont 3 special teeth at 1/2 place between 1/3 place and the 3rd cylinder orthodont and the 4th cylinder orthodont; The every half cycle of crankshaft signal dish comprises 2 adjacent teeth of tooth removal that 30 intervals equate.By to CRANK PULSES and camshaft pulse counting, according to the value of CRANK PULSES counter, determine the profile of tooth of current camshaft pulse correspondence, thereby determine the current phase place of motor.The shortcoming of this method is when engine speed change is big, the frequency of CRANK PULSES is bigger, because the counter speed of response is limited, counting easily produces mistake, thereby make and correctly to judge the profile of tooth of camshaft pulse correspondence or make false judgment, cause correctly to determine the phase place that motor is current.
The another kind of mode of execution of prior art, as notice of authorization number is the disclosed cylinder of internal-combustion engine recognition device of CN 1087393C, provide two signal occurrence device by being installed in the signal panel that being used on the camshaft detect rotation for each cylinder, and before these two signals, increase a cylinder discrimination signal, and two sensors are installed to be made it detected signal and has certain phase difference, its deterministic process is that the number of times of the pulse that earlier two sensor signals produced makes up and draws " a 10 " sequence, then this sequence is sent into standard state in identification module and the storage and is compared and finish identification.The shortcoming of this method is to produce the sequence that is used to discern by two pulses are counted, and it installs complicated.
Summary of the invention
The objective of the invention is at the baroque shortcoming of existing cylinder sequence discriminating gear, a kind of signal panel that are used for the cylinder sequence differentiation simple in structure are provided.
Another object of the present invention is at the baroque shortcoming of existing cylinder sequence discriminating gear, and a kind of cylinder sequence discriminating gear of simple in structure and accuracy of judgement is provided.
Another object of the present invention is the not high shortcoming of method of discrimination reliability at existing cylinder sequence, and a kind of difficult wrong cylinder sequence method of discrimination that produces is provided.
The invention provides a kind of signal panel that are installed on the engine cam, wherein on the excircle of these signal panel, has a plurality of identical shaped projection that circumferentially uniformly-spaced is provided with, and also have on a side surface of these signal panel and the corresponding a plurality of discriminating devices that are used to distinguish described projection of each described projection, this discriminating device has or does not have flange.
The present invention also provides a kind of cylinder recognition device, comprises signal panel, sensor and controller, and wherein signal panel are according to signal panel of the present invention; Described sensor comprises the first sensor and second sensor that is connected with controller respectively; Described first sensor is set to be used for the arrival of the described projection of sensing, and produces corresponding protruding pulse signal, and this pulse signal becomes high level when projection arrives, become low level when projection is left; Described second sensor is set to be used for the arrival of the flange of the described discriminating device of sensing, and produces corresponding flange pulse signal, and this pulse signal becomes high level when flange arrives, become low level when flange leaves; Described controller is set to discern according to the pulse signal of described sensor output the cylinder of the running in the given stroke.
The present invention also provides a kind of method that adopts cylinder judging device of the present invention to discern the cylinder of the running in the given stroke, it is characterized in that, this method may further comprise the steps:
With each projection with specific bit word be associated with the corresponding cylinder of this projection;
Signal detection step: with the arrival of the described projection of described first sensor sensing, and produce corresponding protruding pulse signal, this pulse signal becomes high level when projection arrives, become low level when projection is left; And with the arrival of the flange of the described discriminating device of the described second sensor sensing, and produce corresponding flange pulse signal, this pulse signal becomes high level when projection arrives, become low level when projection is left;
Signal processing and identification step: detect the pulse signal that produces in the step by described controller received signal, discern the particular moment of given stroke according to the pulse signal of projection, and, discern the pairing specific cylinder of this given stroke by determined bit words by the pulse signal of flange is compared to determine described bit words with the pulse signal of projection.
The signal panel of cylinder sequence discriminating gear provided by the invention and method the application of the invention have overcome the baroque shortcoming of existing apparatus, and a kind of constitute cylinder sequence discriminating gear and corresponding method thereof simple and that be difficult for makeing mistakes are provided.
Description of drawings
Fig. 1 is the stereogram according to the signal panel of a kind of embodiment of the present invention;
Fig. 2 is the stereogram according to the signal panel of another kind of embodiment of the present invention;
Fig. 3 is the schematic representation according to the flange arrangement of signal panel of the present invention;
Fig. 4 is the front view according to the signal panel of Fig. 1 or Fig. 2;
Fig. 5 is the oscillogram of protruding according to an embodiment of the invention pulse signal and flange pulse signal;
Fig. 6 is the flow chart of signal processing and identification according to an embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing to signal panel provided by the present invention and comprise that the engine cylinder sequence discriminating gear and the method for discrimination of these signal panel are described further.
The invention provides a kind of signal panel that are installed on the engine cam, wherein on the excircle of these signal panel, has a plurality of identical shaped projection that circumferentially uniformly-spaced is provided with, and also have on a side surface of these signal panel and the corresponding a plurality of discriminating devices that are used to distinguish described projection of each described projection, this discriminating device has or does not have flange.The signal panel that comprise 4 projectioies as shown in Figure 1, it is evident that the projection on the excircle of described signal panel can adopt the flange of the side surface that is positioned at signal panel that sets in advance to replace, and the radial length of described projection can only need factors such as the inner space decision with reference to motor for arbitrarily; The circumferential radian of described projection is by the demarcation decision of different motors.And the flange that it is evident that described discriminating device can adopt the hollow out of the side surface that is positioned at signal panel that sets in advance as shown in Figure 2 to replace; And the mode that can adopt the mode of the dispersed placement shown in Fig. 3 a and disjunctor shown in the 3b to arrange be provided with identical as described in flange; In general the convenience in order to process, preferably adopt the mode of arranging as the disjunctor of Fig. 3 b be provided with as described in flange, be about to a plurality of flanges arranged side by side and be connected as a single entity.
The quantity of the projection on the signal panel is identical with the quantity of cylinder.
In a plurality of discriminating devices of signal panel each is provided so that with its pairing projection to have the different bit words with binary number representation, described bit words is defined as being set to 1 if described projection overlaps then corresponding position with described flange, if described projection does not overlap then corresponding position with described flange and is set to 0, and makes that by high position benefit 0 figure place of described bit words is identical.In general bit words can adopt multidigit, as long as guarantee each protruding bit words difference, for easy common employing can guarantee the minimum bit words figure place that each protruding bit words is different.As shown in Figure 1 comprise 4 described land signals dishes, minimum needs 2 figure places can repeatedly not represented each projection, adopt certainly 3 or more the bit words of multidigit define also and can realize goal of the invention.Its protrusions does not overlap then with any flange, and its bit words is defined as 00, a protruding clockwise side at its symmetry axis overlaps then, and its bit words is defined as 01 with flange, a protruding counterclockwise side at its symmetry axis overlaps then, and its bit words is defined as 10 with flange, projection all overlaps then in the both sides of its symmetry axis, and its bit words is defined as 11 with flange, each protruding bit words is defined as 00 respectively so, 01,10,11.
The present invention also provides a kind of cylinder recognition device, comprises signal panel, sensor and controller, and wherein, signal panel are signal panel provided by the invention; Described sensor comprises the first sensor and second sensor that is connected with controller respectively; Described first sensor is set to be used for the arrival of the described projection of sensing, and produces corresponding protruding pulse signal, and this pulse signal becomes high level when projection arrives, become low level when projection is left; Described second sensor is set to be used for the arrival of the flange of the described discriminating device of sensing, and produces corresponding flange pulse signal, and this pulse signal becomes high level when flange arrives, become low level when flange leaves; Described controller is set to discern according to the pulse signal of described sensor output the cylinder of the running in the given stroke.
Described sensor can be to realize various types of sensor of the present invention, infrared senor, magnetoelectric transducer and Hall transducer or the like as known to those skilled in the art.And the position of sensor relative signal dish is by type of sensor, and promptly the difference of the mode of its sensing determines, as be arranged in signal panel in the radial direction or be arranged on the signal panel lateral vertical side direction.
Described controller is integrated in the control unit of engine of prior art usually, realizes with embedded system or field programmable gate array (FPGA) or specific integrated circuit modes such as (ASIC).
The present invention also provides a kind of method that adopts above-mentioned cylinder judging device to discern the cylinder of the running in the given stroke, and wherein this method may further comprise the steps:
With each projection with specific bit word be associated with the corresponding given stroke of this projection.
Signal detection step: with the arrival of the described projection of described first sensor sensing, and produce corresponding protruding pulse signal, this pulse signal becomes high level when projection arrives, become low level when projection is left; And with the arrival of the flange of the described discriminating device of the described second sensor sensing, and produce corresponding flange pulse signal, this pulse signal becomes high level when flange arrives, become low level when flange leaves;
Signal processing and identification step: detect the pulse signal that produces in the step by described controller received signal, discern the particular moment of given stroke according to the pulse signal of projection, and, discern the pairing specific cylinder of this given stroke by determined bit words by the pulse signal of flange is compared to determine described bit words with the pulse signal of projection.
In the above-mentioned cylinder identifying method, in the oil spout of the rising edge corresponding cylinder of the pulse of the protruding pulse signal moment, the ignition timing of trailing edge corresponding cylinder constantly.Wherein, the rising edge of each pulse of protruding pulse signal and trailing edge respectively with the oil spout of which cylinder constantly and the ignition timing moment corresponding, be that the job order by each set cylinder of different engine calibrations is determined.
In the above-mentioned cylinder identifying method, be by the pulse signal of flange is compared to determine described bit words with the pulse signal of projection.Can adopt method that two pulse signals are carried out logical AND operates and realizes, perhaps few for protruding quantity, as 2 or 4 s' situation, also can realize the mode of sampling of flange pulse signal respectively by rising edge and trailing edge in the pulse of each protruding pulse signal.
In the above-mentioned cylinder identifying method, signal panel can be installed on the bent axle or camshaft of motor, and pass through the out of phase of the pairing cylinder of out of phase of bent axle or camshaft, the signal in the above-mentioned identifying method is provided corresponding definition, can implement above-mentioned cylinder identifying method.Finish the complete series stroke procedure one time when cylinder, bent axle rotated for two weeks, and promptly 720 spend, and camshaft rotates a week, i.e. 360 degree.If be installed on the bent axle, for Signal Processing that senses and identification more complicated, for the definition that makes each signal reflects corresponding physical significance more intuitively, and make that the frequency of signal is low as much as possible so that accurately detect and make things convenient for processing, preferably signal panel are installed on the camshaft.
Embodiment
Be that example illustrates a kind of concrete enforcement of the present invention with the 4G18 of Mitsubishi h type engine h below.The 4G18 of Mitsubishi h type engine h is 4 Cylinder engines, and the ignition order of its 4 cylinder is 1-3-4-2, promptly puts 1 cylinder earlier, puts 3 cylinders again, puts 4 cylinders and 2 cylinders then successively, and the camshaft of this motor is for turning clockwise in addition.
According to the signal panel that are contemplated that its design of the present invention as shown in Figure 4, these signal panel have 4 identical shaped projectioies that circumferentially uniformly-spaced are provided with on excircle, and also have on a side surface of these signal panel and the corresponding a plurality of discriminating devices that are used to distinguish described projection of each described projection, this discriminating device is 3 flanges.Its protrusions 4 does not overlap then with any flange, and its bit words is defined as 00, the projection 2 clockwise sides at its symmetry axis overlap then, and its bit words is defined as 01 with flange, the projection 1 counterclockwise side at its symmetry axis overlaps then, and its bit words is defined as 10 with flange, projection 3 all overlaps then in the both sides of its symmetry axis, and its bit words is defined as 11 with flange, each protruding bit words is defined as 00 respectively so, 01,10,11.
In recognition device, adopt two Hall transducers that are arranged in the signal panel radial direction, the PG3.8 type sensor of producing as Bosch (Bosch) company, the projection of sensing respectively and the arrival of flange and leave.With the arrival of the described projection of first sensor sensing, and produce corresponding protruding pulse signal, this pulse signal becomes high level when projection arrives, become low level when projection is left; And with the arrival of the flange of the described discriminating device of the second sensor sensing, and produce corresponding flange pulse signal, this pulse signal becomes high level when flange arrives, become low level when flange leaves.Can obtain two pulse signals as shown in Figure 5 like this.
In the identifying method of the present invention, the rising edge and the trailing edge of each pulse of protruding pulse signal have been done definition one by one according to the ignition order of this each cylinder of motor, as shown in table 1, protruding pulse signal
The implication of the rising edge of the pulse of the protruding pulse signal of table 1 and trailing edge correspondence
The rising edge of 1,2,3,4 pulse correspond respectively to cylinder 4,2,3,1 oil spout constantly; The trailing edge of 1,2,3,4 pulse of projection pulse signal corresponds respectively to the moment that cylinder 1,3,4,2 inner carriers arrive the compression stroke top dead center constantly, i.e. the ignition timing of each cylinder constantly.The controller that is integrated in the engine management system is sampled to the level of flange pulse signal respectively at the rising edge and the trailing edge of the pulse of each protruding pulse signal, the pulse that the definition of the bit words of contrast projection can draw current protruding pulse signal is which cylinder commencement of fuel injection during by the rising edge of which projection pulse that produce and next protruding pulse signal and trailing edge, and which cylinder begins igniting.So just reached the purpose of identification cylinder.
What Fig. 6 represented is the concrete determination flow of cylinder identification.For example, if controller is at first detected is the rising edge of the pulse of protruding pulse signal, for example, the rising edge sample detecting of the pulse of detected protruding pulse signal to the flange pulse signal be low level, the internal tooth level signal that obtains in the trailing edge sampling of the pulse of this protruding pulse signal is a high level, can judge this this pulse and be by bit words be 01 projection promptly projection 2 produce, then the trailing edge of the pulse of this protruding pulse signal is pairing is the ignition timing of the 3rd cylinder, the rising edge of the pulse of so next protruding pulse signal is corresponding to the oil spout moment of the 2nd cylinder, trailing edge is corresponding to the ignition timing of the 4th cylinder, and other situations can be according to analogizing with quadrat method.At this moment wholely declare the cylinder process and finish, the required time be camshaft rotate an external tooth the center of circle angle of corresponding circular arc, be significantly smaller than 1/4 camshaft cycle.
If if controller at first detected be the trailing edge of the pulse of protruding pulse signal, the flange pulse signal in the time of then also need detecting the rising edge of a pulse of next protruding pulse signal just can be judged the cylinder preface.For example, the flange pulse signal that the trailing edge sampling of the pulse of detected protruding pulse signal obtains is a low level, when the rising edge of a pulse of the protruding pulse signal of the next one sample detecting to the flange pulse signal also be low level, can judge this this pulse and be by bit words be 00 projection promptly projection 4 produce, can judge second protruding pulse signal pulse rising edge corresponding to the oil spout of the 2nd cylinder constantly, trailing edge is corresponding to the ignition timing of the 3rd cylinder.Other situations can be according to analogizing with quadrat method.At this moment wholely declare the cylinder process and finish, the required time is also less than 1/4 camshaft cycle.
Claims (5)
1. cylinder recognition device, comprise signal panel, sensor and controller, wherein, described signal panel are installed on the engine cam, and on the excircle of these signal panel, has a plurality of identical shaped projection that circumferentially uniformly-spaced is provided with, and also have on a side surface of these signal panel and the corresponding a plurality of discriminating devices that are used to distinguish described projection of each described projection, this discriminating device has flange; Described sensor comprises the first sensor and second sensor that is connected with controller respectively; Described first sensor is set to be used for the arrival of the described projection of sensing, and produces corresponding protruding pulse signal, and this pulse signal becomes high level when projection arrives, become low level when projection is left; Described second sensor is set to be used for the arrival of the flange of the described discriminating device of sensing, and produces corresponding flange pulse signal, and this pulse signal becomes high level when flange arrives, become low level when flange leaves; Described controller is set to discern according to the flange pulse signal of the protruding pulse signal of described first sensor output and the output of described second sensor cylinder of the running in the given stroke.
2. cylinder recognition device according to claim 1, each discriminating device in wherein said a plurality of discriminating device is provided so that with its pairing projection to have the different bit words with binary number representation, described bit words is defined as being set to 1 if described projection overlaps then corresponding position with described flange, if described projection does not overlap then corresponding position with described flange and is set to 0, and makes that by high position benefit 0 figure place of described bit words is identical.
3. cylinder recognition device according to claim 1 and 2, the quantity of wherein said projection is identical with the quantity of cylinder.
4. method that adopts claim 2 or 3 described cylinder judging devices to discern the cylinder of the running in the given stroke is characterized in that this method may further comprise the steps:
Each projection with specific bit word is associated with the pairing given stroke of this projection;
Signal detection step: with the arrival of the described projection of described first sensor sensing, and produce corresponding protruding pulse signal, this pulse signal becomes high level when projection arrives, become low level when projection is left; And with the arrival of the flange of the described discriminating device of the described second sensor sensing, and produce corresponding flange pulse signal, this pulse signal becomes high level when flange arrives, become low level when flange leaves;
Signal processing and identification step: detect the pulse signal that produces in the step by described controller received signal, discern the particular moment of given stroke according to the pulse signal of projection, and, discern the pairing specific cylinder of this given stroke by determined bit words by the pulse signal of flange is compared to determine described bit words with the pulse signal of projection.
5. method according to claim 4 is characterized in that, the rising edge of the pulse of described protruding pulse signal is corresponding to the oil spout moment of cylinder, and trailing edge is corresponding to the ignition timing moment of cylinder.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610167388XA CN101210522B (en) | 2006-12-31 | 2006-12-31 | Signal disc and engine cylinder sequence distinguishing device and method containing the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610167388XA CN101210522B (en) | 2006-12-31 | 2006-12-31 | Signal disc and engine cylinder sequence distinguishing device and method containing the same |
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| CN101210522A CN101210522A (en) | 2008-07-02 |
| CN101210522B true CN101210522B (en) | 2010-08-25 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052176B (en) * | 2009-10-30 | 2013-03-20 | 北汽福田汽车股份有限公司 | Cylinder balancing system and cylinder balancing method for multi-cylinder engine |
| CN101813563B (en) * | 2009-12-15 | 2012-04-18 | 吉林大学 | Engine piston position and phase position full operation condition measurement system and method |
| CN102352798B (en) * | 2011-10-29 | 2013-11-06 | 北京理工大学 | Hydrogen fuel engine control method on basis of camshaft signal |
| JP6500453B2 (en) * | 2015-01-22 | 2019-04-17 | セイコーエプソン株式会社 | Circuit device, physical quantity detection device, electronic device and moving body |
| CN104791038A (en) * | 2015-02-28 | 2015-07-22 | 奇瑞汽车股份有限公司 | Cam shaft signal wheel and manufacturing method thereof |
| SE541683C2 (en) * | 2016-12-19 | 2019-11-26 | Scania Cv Ab | Cylinder Detection in a Four-stroke Internal Combustion Engine |
| CN110160799A (en) * | 2018-03-23 | 2019-08-23 | 中国人民解放军陆军工程大学 | A kind of timing circuit of determining diesel engine oil injection time |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1225415A (en) * | 1998-01-30 | 1999-08-11 | 株式会社日立制作所 | Cylinder identifying device for internal combustion engines |
| CN2771504Y (en) * | 2004-11-05 | 2006-04-12 | 北京交通大学 | High-energy direct sequence ignition control device for natural gas engine |
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2006
- 2006-12-31 CN CN200610167388XA patent/CN101210522B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1225415A (en) * | 1998-01-30 | 1999-08-11 | 株式会社日立制作所 | Cylinder identifying device for internal combustion engines |
| CN2771504Y (en) * | 2004-11-05 | 2006-04-12 | 北京交通大学 | High-energy direct sequence ignition control device for natural gas engine |
Non-Patent Citations (2)
| Title |
|---|
| JP特开平11-229948A 1999.08.24 |
| JP特开平9-170481A 1997.06.30 |
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