CN1087811C - Cylinder discrimination apparatus for internal combustion engine - Google Patents
Cylinder discrimination apparatus for internal combustion engine Download PDFInfo
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- CN1087811C CN1087811C CN99106436A CN99106436A CN1087811C CN 1087811 C CN1087811 C CN 1087811C CN 99106436 A CN99106436 A CN 99106436A CN 99106436 A CN99106436 A CN 99106436A CN 1087811 C CN1087811 C CN 1087811C
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- protuberance
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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
- F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
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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)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
A cylinder discrimination apparatus for multi-cylinder internal combustion engine comprises: a first signal member and a second signal member mounted on a camshaft, a crank shaft angle sensor opposite to the first signal member and a cam angle sensor opposite to the second signal member. The first signal member is selected from concave part teams and convex part teams that have the same number of the cylinder, the number of concave part and convex part in the selected team is different from that of other teams. The second signal member is selected from a concave part or a convex part having the same number of the cylinder for opening/closing an intake valve and a discharge valve. The angle sensors of the crank shaft and the camshaft detect the signal of the first signal member and the second signal member, thereby the discrimination for the engine cylinder can be realized quickly and accurately.
Description
The present invention relates to a kind of cylinder discrimination apparatus of internal-combustion engine, relate in particular to a kind of be applicable to Vehicular internal combustion engine can distinguish in the engine revolution process which cylinder is in the cylinder discrimination apparatus of given stroke.
Usually, internal-combustion engine is finished a plurality of strokes in an one work cycle, and two strokes or four-stroke difference are promptly arranged.For this reason, in the internal-combustion engine that includes two multi-cylinders more than the cylinder,, just must distinguish which cylinder is in specific stroke, for example whether be on the compression stroke for the ignition timing of controlling each cylinder and fuel injection timing etc.For above-mentioned reason, internal-combustion engine has a cylinder discrimination apparatus usually.
In traditional cylinder of internal-combustion engine condition discriminating apparatus, advised adopting various device.First kind of prior art as in the prior art illustrated this technology in 88-37336 number Japan patent applicant announce text.This technology that in described first kind of prior art, discloses, as Fig. 2 of the prior art publication and shown in Figure 3, be according to the output signal of a crank angle detecting sensor and be installed in the compression stroke that a cylinder discrimination signal of sensor on the camshaft is distinguished first cylinder.
In addition, as second kind of prior art of prior art, this technology 93-86953 number Japanese patent application treat given explanation in the publication.In this technology shown in this second kind of prior art, as described in its patent specification, on internal combustion (IC) engine camshaft, be equipped with as the disk that detects revolution, three not equidistant protruding points are arranged as differentiating crank angle on the dish, and be provided for distinguishing with respect to first cylinder and a protruding point of cylinder produce a plurality of unequal-interval signals thus.
Distinguish the moment of pulse detection one predetermined arrangement mode utilizing crank angle, and include that crank angle is distinguished the moment of the predetermined arrangement mode of using pulse or when use pulse moment to detect the moment of predetermined pulse interval variation at this cylinder discrimination detecting, thereby the arrangement states in the pulse spacing of above-mentioned a plurality of signals is verified a crank angle and is distinguished, has realized distinguishing cylinder like this.
According to Figure 22 of the specification of the prior art, now illustrate that the moment in above-mentioned predetermined pulse interval variation distinguishes the device of cylinder.Figure 22 represents one three cylinder IC engine of prior art and the relation that the detection position of each cylinder stroke state and CKP also is shown.
In Figure 22,0-notation is represented an aspirating stroke in this stroke, and arrow is represented an igniting position.A compression stroke for each cylinder produces two signals (a-signal, B signal), and is that the compression stroke that detects first cylinder also has a C signal.In this figure, bent axle rotates the circulation that two circles are finished several strokes of motor, and this just constitutes a fundamental period of one four circulation engine.
Detailed position between three signals being made up of the signal A among Figure 22, signal B and signal C is closed to tie up among Figure 23 and is specifically shown.The signal occurrence positions that the CR signal indication is measured by CKP.
When satisfy shown in the table shown in Figure 23 distinguish condition the time just can determine cylinder discrimination to motor.Specifically, according to the continuation time between the signal CR, formula 1 can be distinguished the cylinder of motor below utilizing.
TRATIO≥MKRAT# ......(1)
Wherein, MKRAT #: cylinder discrimination coefficient; TRATIO: pulse interval ratio
Pulse interval is to calculate by following formula 2 than TRATIO.
TRATIO＝(Told1+Told2)/T.....(2)
Wherein, Told1: pulse interval last time; Told2: penult pulse interval; T: up-to-date pulse interval
Above-mentioned in the case MKRAT # gets 5 degree values.Promptly be converted into the angle ratio, take place constantly at the C signal, Told2 has 175 degree, and Told1 has 65 degree, and T has 35 degree, thereby TRATIO is TRATIO=(175+65)/35=7.5.Similar therewith, take place constantly at signal B, because Told2 has 65 degree, Told1 has 175 degree, T has 65 degree, thereby TRATIO is TRATIO=(65+175)/65=3.7.When the situation that signal A takes place, because Told2 has 170 degree, Told1 has 65 degree, and T has 170 degree, thereby TRATIO is TRATIO=(170+65)/170=1.38.
Amid all these factors, be 1.38 because the value of TRATIO takes place constantly at signal A, taking place constantly at signal B is 3.7, is 7.5, when cylinder discrimination coefficient MKRAT # is 5, just can picks out the signal C between signal A and signal B and take place constantly at signal C.
Here, in this first prior art, have such problem: motor rotates at most one at camshaft, and to change be that bent axle rotates two startups before changeing and constantly can not realize cylinder discrimination to motor.
In addition, in second prior art, can realize fast that the stroke of motor distinguishes, yet, owing to be to utilize time between signal recently to realize cylinder discrimination to motor just having such problem: the possibility that in this motor, exists the cylinder mistake to distinguish with big revolution fluctuation.
The present invention considers said circumstances and designs, thereby an object of the present invention is to provide a kind of cylinder discrimination apparatus of motor, in this device, adopt the signal spare that is installed on the camshaft for cylinder discrimination, arrange a CKP simultaneously, and this signal spare that is installed on the camshaft is a cam sensor that detects the valve opening and close timing, according to the initial start that just can realize also can realizing the cylinder discrimination of motor motor to the processing of this testing signal under the situation that fast state and no any mistake are distinguished reliably.
For achieving the above object, cylinder discrimination apparatus according to internal-combustion engine of the present invention is the internal-combustion engine that is used for multi-cylinder, it comprises: one is installed on the first signal spare on the camshaft, one is installed on the secondary signal part on the described camshaft, one with the CKP of the described first signal spare positioned opposite, and one and the cam-position sensor of described secondary signal part positioned opposite, be characterized in, the described first signal spare be from its have with the same number of sets of recesses of cylinder number and have with the same number of protuberance group of cylinder number select, and in a group of selecting by described sets of recesses and described protuberance group, the number of recess and protuberance is different with the number of other group, described secondary signal part is to select from having recess or the protuberance that uses with the same number of engine intake valve opening and close timing of cylinder number and having to open and close the recess that uses or the protuberance with the same number of outlet valve of cylinder number, detect the signal of described first signal spare and described secondary signal part by described CKP and described CMP, realize that thus cylinder distinguishes.
In addition, in the cylinder discrimination apparatus of the motor of a preferred embodiment of the present invention, the recess of the sets of recesses of described CKP or protuberance group and described cam-position sensor or protuberance are to be arranged in to have the Shaft angle angle of writing music for 720 and count divided by cylinder on such position of angle value of gained.And described CKP and described CMP are arranged to obtain the predetermined outer corner difference of a relative signal from two sensors.In addition, the cylinder discrimination apparatus of motor has a control gear, and described control gear is finished cylinder discrimination according to more detected CKP output signals between two continuous output signals of described cam-position sensor.
Adopt the cylinder condition discriminating apparatus of the present invention of said structure, because the described first signal spare has a sets of recesses or the protuberance group that its number is identical with the cylinder number that its number is identical with the cylinder number, and the number of several recesses and protuberance is different with the number of other group in described sets of recesses or protuberance group one group, described secondary signal part is to count the employed recess of engine intake valve opening and close timing of similar number or protuberance and outlet valve with cylinder and open and close employed recess of timing or the protuberance and select from having, output signal number according to a detected CKP between two continuous output signals of described cam-position sensor is finished cylinder discrimination, thereby make the mode of number of the output signal of CKP, can distinguish the cylinder of motor thus according to this mode identification immediately.In addition, when the cylinder of motor is not distinguished immediately, can be distinguished as early as possible according to the cylinder of two continuous output signal motors.Consequently can shorten the starting time of motor.
In addition, in the cylinder discrimination apparatus of another embodiment of the present invention, the described first signal spare has a sets of recesses or the protuberance group that its number is identical with the cylinder number that its number is identical with the cylinder number, and the number of several recesses and protuberance is different with the number of other group in described sets of recesses or protuberance group one group, described secondary signal part is from corresponding to selecting the employed recess of engine intake valve opening and close timing of the specific cylinder of motor or protuberance and employed recess of exhaust valve opening and close timing or the protuberance, a signal according to described first signal spare and described secondary signal part is detected by described CKP and described cam-position sensor, finishes the cylinder discrimination of motor thus.
In addition, in the cylinder discrimination apparatus of the motor of a preferred embodiment of the present invention, the sets of recesses of described CKP or protuberance group are to be arranged in to have the Shaft angle angle of writing music for 720 and count on such position of angle value of gained divided by cylinder and the cylinder discrimination apparatus of motor has a control gear, and described control gear is finished cylinder discrimination to motor according to the number of detected CMP output signal between the output signal of described CKP.
Adopt the cylinder condition discriminating apparatus of the present invention of said structure, specifically, described secondary signal part has recess or the protuberance corresponding to the recess of the engine intake valve opening and close timing use of the specific cylinder of motor or protuberance or the use of exhaust valve opening and close timing, between the output signal of CKP, detect the output signal number of described recess and protuberance according to the output signal of described sets of recesses or described protuberance group, finish the cylinder discrimination of motor then, like this, just can make described cam-position sensor output signal number mode and can distinguish the cylinder of motor immediately.
Promptly because the output signal of cam-position sensor is to count as standard in the output signal with CKP, the signal of above-mentioned cam-position sensor is for example taking place in two cylinders at three cylinder IC engines just, and two recesses or two protuberances of above-mentioned secondary signal part are that the counting of the output signal of CKP just is output in the face of a cam-position sensor " 3 " or " 4 " formation.This meaning only utilizes this signal just can distinguish the cylinder of motor when counting is " 3 ", and when counting is " 4 ", only utilizes this signal just can distinguish the cylinder of motor.Consequently shortened the starting time of motor.
Fig. 1 is an overall structure schematic representation, illustrates the engine system of the cylinder of internal-combustion engine condition discriminating apparatus with first embodiment of the invention;
Fig. 2 is the square frame diagram figure of internal structure of the cylinder of internal-combustion engine condition discriminating apparatus of Fig. 1;
Fig. 3 is a topology view, and cylinder of internal-combustion engine condition discriminating apparatus, CKP and the first signal spare that Fig. 1 is shown are installed in a state of motor;
Fig. 4 is the side view of the first signal spare that the motor of Fig. 3 is shown;
Fig. 5 is the sectional view of being got by the V-V line of Fig. 3, the arrangement relation shown in the figure between the first signal spare and the CKP;
Fig. 6 is a topology view, and first signal spare of cylinder of internal-combustion engine condition discriminating apparatus of another embodiment of the present invention and the arrangement relation between the CKP are shown;
Fig. 7 is a three-dimensional view, cylinder of internal-combustion engine condition discriminating apparatus, the cam-position sensor of Fig. 1 is shown and is installed in a state of the secondary signal part on the motor;
Fig. 8 illustrates the secondary signal part of Fig. 7 and the structural drawing of the arrangement relation between the CKP;
Fig. 9 is an output characteristics view, and the CKP of cylinder discrimination apparatus of motor of Fig. 1 and the signal of cam-position sensor are shown;
Figure 10 is an explanatory drawing, and a stroke, corner signal (CR signal), cam angle signal (VVT signal) and the count value of each cylinder of the cylinder condition discriminating apparatus of Fig. 1 is shown;
Figure 11 is that the controlling party block diagram of a cylinder discrimination process of cylinder discrimination apparatus that the motor of Fig. 1 is shown is separated;
Figure 12 is the explanation view that illustrates according to a cylinder discrimination position of the count value of the cylinder discrimination apparatus of Fig. 1;
Figure 13 is the view of a stroke corner signal (CR signal), cam angle signal (VVT signal) and count value of each cylinder that the cylinder of internal-combustion engine condition discriminating apparatus of another embodiment of the present invention is shown;
Figure 14 is the comparison diagram of corner signal (CR signal) and cam angle signal (VVT signal) that the cylinder condition discriminating apparatus of Figure 13 is shown;
Figure 15 is that the controlling party block diagram of cylinder discrimination process of cylinder condition discriminating apparatus of another embodiment of the present invention of Figure 13 is separated figure;
Figure 16 illustrates the engine speed of internal-combustion engine when starting time of the traditional cylinder discrimination apparatus with prior art and the plotted curve that concerns between the time;
The motor that Figure 17 illustrates the cylinder discrimination apparatus of the present invention with Fig. 1 when starting rotating speed and the plotted curve that concerns between the time;
Figure 18 is the plotted curve of the distribution of starting number of times of starting time that the motor of the traditional cylinder discrimination apparatus with prior art is shown;
Figure 19 is the plotted curve of the distribution of starting number of times of starting time that the motor of the cylinder discrimination apparatus of the present invention with Fig. 1 is shown;
Figure 20 is the explanatory drawing and the relational view of corner signal (CR signal) and cam angle signal (VVT signal) when being presented at the cylinder condition discriminating apparatus and being used for the situation of four-cylinder internal combustion engine of cylinder discrimination apparatus of the internal-combustion engine of a diagram another embodiment of the present invention;
Figure 21 is the comparison diagram of corner signal (CR signal) and cam angle signal (VVT signal) that the cylinder condition discriminating apparatus of the present invention of Figure 20 is shown;
Figure 22 illustrates the stroke of each cylinder of traditional cylinder discrimination apparatus of motor of prior art and the explanatory drawing of the corresponding relation between the corner signal (CR signal); And
Figure 23 shows the corner signal (CR signal) of traditional cylinder discrimination apparatus of prior art and the explanatory drawing of the corresponding relation between the cylinder discrimination position.
Describe the cylinder of internal-combustion engine condition discriminating apparatus of one embodiment of the present of invention below with reference to accompanying drawings in detail.
Fig. 1 illustrates the whole schematic construction of an engine system of the cylinder of internal-combustion engine condition discriminating apparatus that is furnished with one embodiment of the invention (first embodiment).
In Fig. 1, one for example the internal-combustion engine 1 used of automobile comprise a cylinder 1a and a piston 1b, suction tude (intake manifold) 4 and outlet pipe 19 are connected the top on the described cylinder 1a and also are furnished with an oil sprayer 6 and the spark plug 18 that a suction valve 7, an outlet valve 8, have electronic control system.
One of upstream arrangement in described suction tude 4 has sky filter 5 and the throttle valve of controlling air inflow, i.e. the throttle valve assembly of throttle valve body 2.Isc valve (IACV (Idle Air Control Valve)) 21 and throttle valve sensor 17 and pressure transducer 16 are installed on the described throttle valve body 2, and lambda sensor 11 is installed on the outlet pipe 19.
On internal-combustion engine 1, be furnished with cooling-water temperature sensor 12, accept the first signal spare 15 signal CKP 13 and accept the cam-position sensor 14 of the signal of secondary signal part 51.Fuel oil passes through fuel pump 31 and supplies with above-mentioned oil sprayer 6 from fuel tank 30, and fuel oil also arrives oil sprayer 6 by fuel pipe 33 by regulator 32 adjustment pressure and sprayed with suitable emitted dose by described oil sprayer 6.
The testing signal of throttle valve sensor 17, pressure transducer 16, lambda sensor 11, cooling-water temperature sensor 12, CKP 13 and cam-position sensor 14 etc. is transfused to engine controlling unit (controller) 10, and this controller further is sent to output signal spark plug 18 and fuel pump 31 by oil sprayer 6, isc valve 21 and spark coil 9.Label 22 expression storage batteries, the main relay of label 23 expression controllers 10, and label 24 expression fuel pump relay.
Fig. 2 illustrates the block diagram of internal structure of the engine controlling unit (controller) 10 of cylinder of internal-combustion engine condition discriminating apparatus.
Engine controlling unit (controller) 10 is that a computer comprises input circlult 191, A/D (analog/digital) transducer 192, central processing unit (CPU) 193, ROM (ROM (read-only memory)) 194, RAM (random access memory) 195 and output circuit 196.When the situation of analogue signal, input circlult 191 is for example accepted the signal from cooling-water temperature sensor 9 grades and throttle valve opening sensor 9, finishes the removal of the noise component in the signal, and this signal is transferred to analog/digital converter 192 then.
Central processing unit (CPU) 193 receives the result of analog/digital converters, have by execution be stored in medium for example the predetermined control program of the oil spout control program in ROM 194 grades and other signal of control finish the function of above-mentioned control and diagnosis.These processing result and above-mentioned analog-to-digital conversion result are stored among the RAM 195 more temporarily, and above-mentioned processing result is output and is used to control oil sprayer 3 and spark coil 9 etc. as control output signal 197 by output circuit 196.
Fig. 3, Fig. 4 and Fig. 5 illustrate structure between the CKP 13 and the first signal spare 15 and above-mentioned CKP 13 and the first signal spare 15 and are installed in state on the motor 1 of the present invention.
Fig. 3 is a front elevation, and wherein a part of seeing from motor 1 front portion is dissectd, and at lower disposed one bent axle 61, arranges a camshaft 62 by described bent axle 61 drivings on top.Cam cover 60 cover cap camshafts 62, and the first signal spare 15 is fixed on the end of camshaft 62.
CKP 13 is installed on the cam cover 60 on cover cap motor 1 top, and as shown in Figure 5, this CKP 13 and the first signal spare 15 are relatively arranged.
The first signal spare 15 that is fixed on the camshaft 62 forms disc-shape and faces CKP 13 rotations with 1/2nd speed of crankshaft.
As shown in Figure 4, be formed with three protuberance groups being made up of the first protuberance group 15a, the second protuberance group 15b and the 3rd protuberance group 15c, its number is identical with the cylinder number of motor 1.The first protuberance group 15a has two protuberance E, E, and the second protuberance group 15b has two protuberance E, E, and the 3rd protuberance group 15c has three protuberance E, E, E.
In addition, owing to CKP 13 is and three protuberance group 15a of the first signal spare 15,15b and 15c relatively install, and CKP 13 can detect the changes of magnetic field of raised part E according to the rotation of the first signal spare 15.
Fig. 6 illustrates the another kind of detection device of crank angle, and CKP 13 is mounted on the peripheral direction of the first signal spare 15.By making up the arrangement relation that two above-mentioned erecting devices can form 13 of the above-mentioned first signal spare 15 and above-mentioned CKP.
Fig. 7 and Fig. 8 illustrate the installment state between cam-position sensor 14 and the secondary signal part 51.Secondary signal part 51 is installed on the other end of camshaft 62, and above-mentioned cam-position sensor 14 is relatively to arrange with above-mentioned secondary signal part.Above-mentioned secondary signal part 51 is to form three protuberance F on periphery equal intervals ground, and F and F are with the signal of each cylinder of output motor.
Fig. 9 illustrates the above-mentioned CKP 13 of cylinder of internal-combustion engine condition discriminating apparatus of the present invention or the output characteristics of cam-position sensor 14.
In above-mentioned CKP 13 or cam-position sensor 14, as each the protuberance E that is arranged on the first signal spare 15 and the secondary signal part 51, E..., F, F... by the time changes of magnetic field that produced be hunted down, and in the inter-process circuit of engine controlling unit 10, produce square waveform B.
On the other hand, the square waveform of above-mentioned CKP 13 or cam-position sensor 14 distinguishes that similarly the signal in input circlult 191 exists, and this signal is sent to central processing unit (CPU) 193 as high/low signal by signal line shown in Figure 2 198 and 199.In central processing unit (CPU) 193, the voltage of signal line 198 changes to height by low, press the timing realization Interrupt Process shown in the C letter of Fig. 9.
Figure 10 illustrates corresponding relation between each cylinder stroke, when the cylinder of internal-combustion engine condition discriminating apparatus with this embodiment of the present invention is used for three cylinder IC engines 1, CR signal is as the output signal of CKP 13, and engine intake valve opening and close timing signal (the following VVT signal of slightly being write as) is as the output signal of cam-position sensor 14.
Because the first above-mentioned signal spare 15 forms by the first protuberance group 15a, three protuberance groups that the second protuberance group 15b and the 3rd protuberance group 15c form, and two protuberance E, with E or three protuberance E, E and E are arranged on three protuberance group 15a, on each of 15b and 15c, from the CR signal of above-mentioned CKP 13 as one wherein two numbers or three numbers be one group signal output, and in addition in from the VVT signal of above-mentioned cam-position sensor 14 a number signal with uniformly-spaced time output.
A count value shown in Figure 10 (a kind of mode signal) is wherein calculated and is exported the CR signal how many numbers are arranged between the two number VVT signals.About said counting value (count number), some signals (count number) are " 3 ", as long as just can distinguish the cylinder of motor with this signal, if and this signal (count number) is " 2 ", by with last for example combined, just can distinguish the cylinder of motor with the count signal (count number) before the signal shown in signal " 3 " and signal " 2 " and signal " 2 " and the signal " 2 ".
Above-mentioned VVT signal is to carry out cylinder discrimination with the engine intake valve opening and close timing, yet, can finish cylinder equally and distinguish when being engine intake valve opening and close timing and engine exhaust port opening and close timing when all adopting simultaneously in addition with engine exhaust valve opening and close timing or above-mentioned two kinds.
Figure 11 illustrates the controlling party block diagram of the cylinder of internal-combustion engine condition discriminating apparatus of realizing this embodiment of the present invention and separates.
With the CR signal input input signal treatment device 210 of CKP 13, then with removals such as noises.With the VVT signal input input signal treatment device 220 of cam-position sensor 14, then with removals such as noises.
Above-mentioned each signal is transfused to crank angle counting device 230, and when the VVT of above-mentioned cam-position sensor 14 signal is transfused to, signal to CKP 13 is counted, and is transfused to up to the next VVT signal of cam-position sensor 14, exports this count signal then continuously.
If three cylinder IC engines, then with the continuous mode of said counting signal and take place and export in the mode of " 322322322.... ".The mode count signal output that takes place is like this entered cylinder discrimination apparatus 240, finish the cylinder discrimination of motor then.By obtaining the predetermined modality data in cylinder discrimination reference signal storage device 250, whether the mode by contrasting above-mentioned count signal numeral or the combination of a plurality of count numbers also confirm the consistent cylinder discrimination of finishing motor again.
Promptly monitor the count numbers state of CR signal counting device, if count numbers is " 3 " (three input signals of CKP), because " 3 " are unique, it just is characterized as the compression stroke of second cylinder of motor.When another kind of situation, if mode is a row " 2 " and " 2 " count numbers, then it is characterized as the compression stroke of motor the 3rd cylinder, and mode is count numbers " 3 " and " 2 ", and then it is characterized as the compression stroke of first cylinder of motor.
Figure 12 illustrates these above-mentioned states, is understood that from Figure 12, only calculates count numbers " 2 " at first, and this can not distinguish the cylinder of motor, after this can finish the cylinder discrimination of motor then continuously reliably.
Then, below will be according to Figure 13, Figure 14 and the cylinder of internal-combustion engine condition discriminating apparatus that another embodiment of the present invention is described shown in Figure 15.
Figure 13 is a stroke, a corner signal (CR signal), cam angle signal (VVT signal) and the count value of each cylinder that the cylinder of internal-combustion engine condition discriminating apparatus of another embodiment of the present invention is shown.
Figure 14 illustrates the corner signal (CR signal) of cylinder discrimination apparatus of motor of Figure 13 and the comparison diagram of cam angle signal (VVT signal).
Figure 15 is that the controlling party block diagram of cylinder discrimination of cylinder condition discriminating apparatus of another embodiment of the present invention of Figure 13 is separated.
In the cylinder condition discriminating apparatus of present embodiment of the present invention, as shown in figure 13, the CR signal of CKP 13 as benchmark, is counted the VVT signal of cam-position sensor 14.For in two each cylinders, producing the VVT signal of above-mentioned cam-position sensor 14, on above-mentioned secondary signal part 51, be formed with two protuberances.Figure 13 illustrates the outgoing position of above-mentioned two VVT signals in the present embodiment, and for another shown in Figure 14, and the count numbers of " 3 " or " 4 " of CR signal is transferred to a VVT signal.
If the count numbers of CR signal is " 3 ", as long as just can distinguish cylinder with this signal, and if the count numbers of other CR signal is " 4 ", need only and just can distinguish cylinder with this signal.
As mentioned above, Figure 15 controlling party block diagram that the cylinder condition discriminating apparatus of realizing present embodiment of the present invention is shown is separated.
With the CR signal input input signal treatment device 210 of CKP 13, then with removals such as noises.On the other hand, with the VVT signal input input signal treatment device 220 of cam-position sensor 14, then with removals such as noises.With the CR signal input CR signal counting device 270 of CKP 13, and in CR signal counting device 270, the signal digital of CKP 14 is counted.With the VVT signal input cam angular signal counting device 290 of cam-position sensor 14 and the signal digital of cam-position sensor 14 is counted.
In count numbers collating unit 300, form above-mentioned two counting devices, be the signal of CR signal counting device 270 and cam angle signal-count device 290, the array of the CR signal of CKP 13 and the signal of cam-position sensor 14 is become digital corresponding relation with the signal of the CR signal of CKP 13 and cam-position sensor 14.
Make the mode situation of the CR signal of CKP 13 be produced as " 343434... ", as shown in figure 14.The mode that produces is like this mail to cylinder discrimination apparatus 310, finish cylinder then and distinguish.By obtaining to the tentation data of cylinder discrimination reference signal storage device 250 and whether consistently confirming, just can realize that cylinder distinguishes with above-mentioned count numbers.
When the count numbers of CKP 13 is count numbers of " 3 " and cam-position sensor 14 when being " 1 ", it can be characterized as the compression stroke of second cylinder of motor.When the count numbers of CKP 13 is count numbers of " 4 " and cam-position sensor 14 when being " 1 ", it is characterized as the compression stroke of the 3rd cylinder of motor.Thereby, can be similar to above-mentioned first embodiment of the present invention the cylinder of the second embodiment of the present invention is distinguished.
Figure 16 illustrates the engine speed in the start-up course of an internal-combustion engine of the cylinder discrimination apparatus with prior art and the plotted curve of time relationship.
Figure 17 illustrates the engine speed in the start-up course of the motor with cylinder discrimination apparatus of the present invention and the plotted curve of time relationship.
In Figure 16, confirm the startability of cylinder discrimination of the cylinder condition discriminating apparatus of prior art with the machine of reality, and in Figure 17, confirm the startability of cylinder discrimination of the cylinder condition discriminating apparatus of present embodiment of the present invention with actual machine.
Figure 16 and Figure 17 are illustrated in the rotary speed property in the engine starting process.When the situation of the prior art of Figure 16,, will repeat that cylinder takes place and distinguish fault, thereby further require the engine start time greater than 3 seconds because the fluctuation of speed is big.On the other hand, in this embodiment of the present invention shown in Figure 17, be understood that, can finish rapidly that cylinder is distinguished and the engine start time can be less than 1 second.
Figure 18 is the plotted curve that starts the number of times distribution of starting time that the motor of the traditional cylinder discrimination apparatus with prior art is shown, and the plotted curve that starts the number of times distribution of the starting time of the motor of the cylinder discrimination apparatus of the present invention of the above-mentioned Fig. 1 of having of Figure 19.
Figure 18 illustrate above-mentioned actual machine validate result statistics and the number of starts distribution of prior art is shown, and Figure 19 illustrates the statistics of validate result of actual machine of the present invention and the distribution of the number of starts.
Compare with the cylinder condition discriminating apparatus of prior art shown in Figure 180, be understood that, discreteness that can the limiting engine number of starts in the cylinder condition discriminating apparatus of the described present embodiment of the present invention of Figure 19 also shortens starting time of motor.
As mentioned above, be illustrated with cylinder condition discriminating apparatus at length, yet the present invention is not limited to this,, can carries out various replacements designs in the scope of the spirit of the present invention illustrated as claims to the embodiment of the invention.
For example, in the cylinder of internal-combustion engine condition discriminating apparatus of the above embodiment of the present invention, with the signal of CKP 13 as reference signal count cam-position sensor 14 signal and in addition the signal of cam-position sensor 14 in two cylinders, take place, yet, on the contrary a plurality of signals of cam-position sensor 14 can be supplied with a cylinder and set this numeral in each cylinder, can obtain same effect.Yet, when this situation, will complicate the issue and increase the load of computer.
Figure 20 be illustrate another embodiment of the present invention the cylinder of internal-combustion engine condition discriminating apparatus figure and be the graph of a relation of corner signal (CR signal) and cam angle signal (VVT signal) when being illustrated in this cylinder condition discriminating apparatus and being used for four cylinder engine, and Figure 21 illustrates the corner signal (CR signal) of cylinder condition discriminating apparatus of Figure 20 and the comparison diagram of cam angle signal (VVT signal).
In addition, as mentioned above, Figure 20 and Figure 21 illustrate the embodiment that the present invention adopts four-cylinder internal combustion engine, similar therewith, aspect the corresponding relation between the signal digital of the signal digital of CKP 13 and cam-position sensor 14, when finishing, the present invention also can obtain these effects on above-mentioned three cylinder IC engines.
In addition, in the cylinder of internal-combustion engine condition discriminating apparatus of the above embodiment of the present invention, be to be formed with protuberance on 51 at the first and second signal spares 15, yet, on the first and second signal spares 15 and 51, can form recess to substitute described protuberance.
As seen from the above, cylinder condition discriminating apparatus of the present invention has two detection devices (CKP and cam-position sensor) and two quilts through examined detection device (the first signal spare and secondary signal part), and by numeral and the position of the above-mentioned quilt of regulation through the test section of examined detection device (described protuberance or recess), and further by detecting this position, just can distinguish cylinder, when engine start, revolve at camshaft that to go around be before crankshaft rotating two is changeed, just can finish cylinder and distinguish.
In addition, when carrying out cylinder discrimination with cylinder of internal-combustion engine condition discriminating apparatus of the present invention, owing to be not recently to realize that cylinder distinguishes the time between signal of adopting, even in the motor with big fluctuation of speed, the cylinder mistake can not take place yet distinguish.
Claims (7)
1. cylinder (1a) condition discriminating apparatus of an internal-combustion engine (1), it comprises: one is installed on the first signal spare on the camshaft (62), one is installed on the secondary signal part on the described camshaft (62), one with the CKP (13) of the described first signal spare positioned opposite, and one and the cam-position sensor (14) of described secondary signal part positioned opposite, be characterized in:
The described first signal spare be from its have with the same number of sets of recesses of motor (1) cylinder (1a) number and have with the same number of protuberance group of motor (1) cylinder (1a) number select, and in a group of being selected by described sets of recesses and described protuberance group, the number of recess and protuberance is different with the number of other group;
Described secondary signal part is to select from having recess or the protuberance that uses with motor (1) cylinder (1a) number same number of engine intake valve (7) opening and close timing and having to open and close the recess of use or the protuberance with motor (1) cylinder (1a) the same number of exhaust valve of number (8); And,
Detect the signal of described first signal spare and described secondary signal part by described CKP (13) and described CMP (14), realize that thus motor (1) cylinder (1a) distinguishes.
2. cylinder (1a) condition discriminating apparatus of internal-combustion engine as claimed in claim 1 (1) is characterized in that:
The recess of the sets of recesses of described CKP (13) or protuberance group and described cam-position sensor (14) or protuberance are to be arranged in to have on such position of Shaft angle angle divided by the angle value of motor (1) cylinder (1a) number gained of writing music for 720.
3. cylinder (1a) condition discriminating apparatus of internal-combustion engine as claimed in claim 1 (1) is characterized in that:
Described CKP (13) and described CMP (14) are arranged to obtain the predetermined outer corner difference of a relative signal from described CKP (13) and described cam-position sensor (14).
4. cylinder (1a) condition discriminating apparatus of internal-combustion engine as claimed in claim 1 (1) is characterized in that:
The cylinder of motor (1a) condition discriminating apparatus has a control gear (10), and described control gear (10) is finished cylinder (1a) according to more detected CKP (13) output signal between two continuous output signals of described cam-position sensor (14) and distinguished.
5. cylinder (1a) condition discriminating apparatus of an internal-combustion engine (1), it comprises: one is installed on camshaft (the first signal spare on 62, one is installed on the secondary signal part on the described camshaft (62), one with the CKP (13 of the described first signal spare positioned opposite, and one and the cam-position sensor (14) of described secondary signal part positioned opposite, be characterized in:
The described first signal spare be from its have with the same number of sets of recesses of motor (1) cylinder (1a) number and have with the same number of protuberance group of motor (1) cylinder (1a) number select, and in a group of being selected by described sets of recesses and described protuberance group, the number of recess and protuberance is different with the number of other group;
Recess that described secondary signal part uses from engine intake valve (7) opening and close timing corresponding to the specific cylinder (1a) of motor (1) or protuberance and exhaust valve (8) open and close the recess that uses or the protuberance and select;
According to a signal of described first signal spare and described secondary signal part by described CKP (13 and described cam-position sensor (14) detect;
Finishing the cylinder (1a) of motor thus distinguishes.
6. cylinder (1a) condition discriminating apparatus of internal-combustion engine as claimed in claim 5 (1) is characterized in that: the sets of recesses of described CKP (13) or protuberance group are to be arranged in to have on such position of Shaft angle angle divided by the angle value of motor (1) cylinder (1a) number gained of writing music for 720.
7. cylinder (1a) condition discriminating apparatus of internal-combustion engine as claimed in claim 5 (1) is characterized in that:
The cylinder of described motor (1a) condition discriminating apparatus has a control gear (10), and described control gear (10) is finished according to the number of detected CMP (14) output signal between the output signal of described CKP (13) cylinder (1a) of motor (1) is distinguished.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP118447/98 | 1998-04-28 | ||
| JP10118447A JPH11311148A (en) | 1998-04-28 | 1998-04-28 | Cylinder judging device for engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1233711A CN1233711A (en) | 1999-11-03 |
| CN1087811C true CN1087811C (en) | 2002-07-17 |
Family
ID=14736880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99106436A Expired - Fee Related CN1087811C (en) | 1998-04-28 | 1999-04-28 | Cylinder discrimination apparatus for internal combustion engine |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH11311148A (en) |
| KR (1) | KR19990083545A (en) |
| CN (1) | CN1087811C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3824853B2 (en) * | 2000-10-27 | 2006-09-20 | 三菱電機株式会社 | Cylinder discrimination device for internal combustion engine |
| SE541683C2 (en) * | 2016-12-19 | 2019-11-26 | Scania Cv Ab | Cylinder Detection in a Four-stroke Internal Combustion Engine |
| CN111140353B (en) * | 2019-12-16 | 2021-06-22 | 潍柴动力股份有限公司 | Method and device for testing number of cylinders of engine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2707275B2 (en) * | 1988-05-23 | 1998-01-28 | 富士重工業株式会社 | Engine control device |
| JP3395518B2 (en) * | 1995-05-31 | 2003-04-14 | トヨタ自動車株式会社 | Internal combustion engine crank angle detection device |
| KR19980048568U (en) * | 1996-12-30 | 1998-09-25 | 박병재 | Engine control device by vehicle cylinder explosion |
| KR19980060126A (en) * | 1996-12-31 | 1998-10-07 | 박병재 | Cylinder Discrimination Device Using Phase Sensor |
-
1998
- 1998-04-28 JP JP10118447A patent/JPH11311148A/en active Pending
-
1999
- 1999-04-27 KR KR1019990015124A patent/KR19990083545A/en not_active Application Discontinuation
- 1999-04-28 CN CN99106436A patent/CN1087811C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11311148A (en) | 1999-11-09 |
| KR19990083545A (en) | 1999-11-25 |
| CN1233711A (en) | 1999-11-03 |
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