CN1162068A - Ignition control system - Google Patents
Ignition control system Download PDFInfo
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- CN1162068A CN1162068A CN 97102151 CN97102151A CN1162068A CN 1162068 A CN1162068 A CN 1162068A CN 97102151 CN97102151 CN 97102151 CN 97102151 A CN97102151 A CN 97102151A CN 1162068 A CN1162068 A CN 1162068A
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- ignition angle
- signal
- premature ignition
- circuit
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- Electrical Control Of Ignition Timing (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
The invention relates to an ignition control system of external combustion engine, which comprises: a device for limiting the controllable range of advance ignition angle by generating a maximum ignition angle signal associated with the maximum advance ignition angle and a minimum ignition angle signal associated with the minimum advance ignition angle; a first circuit provided with an output end, a signal electric level change is generated at the output end and also an ignition signal is generated in the controllable range of the advance ignition angle; a second circuit used to prohibit the signal electric level change at the output end of the first circuit until reach an advance ignition angle. The advance ignition angle exceeds an increment of preset engine speed according to the engine speed so as to be delayed by the maximum advance ignition angle.
Description
The present invention relates to the Iganition control system of internal-combustion engine.
The ignition system that is used for automobile has polytype.For example, as shown in figure 11, some are used to control ignition system post ignition time when engine speed surpasses a predetermined high-speed NR (for example 7000rpm) of quartastroke engine, to reduce engine power, the restriction engine speed.Should be understood that, be lower than the engine speed scope of high engine speed NR, igniting taken place with a maximum premature ignition angle (Spark advance angle) DF, and when engine speed when presetting high-speed NR, be delayed firing time, until reaching minimum premature ignition angle DS.In two-stroke engine, also can adopt the delay of such firing time, to obtain desirable igniting in high engine speed scope.
The control of even now can realize with numerically controlled form by the CPU in the control circuit of CDI system, but this will cause the raising of the complicated and expense of control circuit.
In view of such problem of the prior art, top priority of the present invention provides a kind of control system of internal-combustion engine ignition cheaply, and this system can finish the premature ignition angle in predetermined high engine speed scope and postpone control.
Another object of the present invention is by means of using CR circuit and comparator that a kind of Iganition control system is provided.
A further object of the present invention provides a kind of Iganition control system that can control the premature ignition angle more accurately.
Another purpose of the present invention provides a kind of Iganition control system of the engine speed scope that should take place with minimum premature ignition angle of can be used for lighting a fire.
A further object of the present invention provides a kind of Iganition control system of saving power.
For achieving the above object, the invention provides a kind of internal-combustion engine ignition control system, comprising:
By produce one with the maximum of maximum premature ignition angular correlation igniting angle signal, and device that limits the possible control range at premature ignition angle with the minimum ignition angle signal of minimum premature ignition angular correlation;
One first circuit has an output terminal, and this circuit is used for producing a signal level variation at its output terminal, may produce an igniting signal in the control range the above-mentioned of premature ignition angle;
A second circuit, the signal level variation that is used to forbid first circuit output end, until reaching a premature ignition angle, this premature ignition angle exceeds the increase of a predetermined engine speed according to engine speed and is postponed from maximum premature ignition angle.
Other purposes of the present invention, feature and advantage see hereinafter and describe.
Describe the present invention in detail below in conjunction with accompanying drawing.
Fig. 1 is the schematic block circuit diagram according to ignition system of the present invention, and this system is applicable to the four-stroke engine of motorcycle;
Fig. 2 is the circuit diagram of the power supply circuit piece 5 among Fig. 1;
Fig. 3 is the circuit diagram of the thyratron trigger circuit piece 6 among Fig. 1;
Fig. 4 is the circuit diagram of the pulse signal input circuit piece 8 among Fig. 1;
Fig. 5 is the circuit diagram of the pulse control voltage pulse generation circuit block 9 among Fig. 1;
Fig. 6 is the circuit diagram of the premature ignition angle control circuit piece 10 among Fig. 1;
Fig. 7 is the circuit diagram of the comparator power supply circuit piece 11 among Fig. 1;
Fig. 8 is the circuit diagram of the premature ignition angle delay circuit piece 12 among Fig. 1;
Fig. 9 is the time diagram of the waveform of difference in the expression control circuit;
Figure 10 is the time diagram of expression waveform of difference when being higher than predetermined value NR according to of the present invention, engine speed;
Figure 11 represents traditional ignition timing characteristic.
Describe embodiments of the invention in detail below in conjunction with accompanying drawing.
Fig. 1 is the schematic block circuit diagram according to ignition system of the present invention, is applicable to the four-stroke engine of motorcycle.Provide a signal by drive coil 1 to the EXT terminal of the control circuit 2 of this system, this signal is rectified into positive half cycle waveform by diode D1.The main capacitor C1 charging of positive half cycle waveform signal to discharging by thyratron SCR selectively.The discharge current of main capacitor C1 offers the primary air of spark coil system 3 by terminal IGN, thereby produces igniting by the spark plug 4 that the secondary winding with spark coil system 3 links to each other.
The signal that offers the EXT terminal is supplied with thyratron trigger circuit piece 6 by power supply circuit piece 5 simultaneously.The control utmost point of this thyratron trigger circuit piece 6 control thyratron SCR.
Be connected with a pulser coil 7 on the terminals P C of control circuit 2, this coil produces a pulse signal at each maximum premature ignition angle and minimum premature ignition angle, and these angles define the scope that may control at premature ignition angle.The pulse signal that is produced by pulser coil 7 is used to limit the pulser signal input circuit piece 8 of signal of the controlled range at premature ignition angle by the generation in the terminals P C supply control circuit 2.Specifically, by circuit block 8 the maximum ignition advance angle signal corresponding to the pulse form of maximum ignition advance angle that is produced is delivered to pulser control voltage pulse generation circuit block 9, by circuit block 8 the minimum premature ignition angle signal input circlult piece 9 of the pulse form corresponding to minimum premature ignition angle and the premature ignition angle control circuit piece 10 that are produced.
The pulsewidth of the pulser control voltage pulse signal that pulser control voltage pulse generation circuit block 9 produces is corresponding to the controlled range at premature ignition angle.This pulser control voltage pulse signal is transfused to premature ignition angle control circuit piece 10 and comparator power supply circuit piece 11.Circuit block 10 provides a premature ignition angle control signal to thyratron trigger circuit piece 6, and these trigger circuit respond this premature ignition angle control signal and provide a trigger signal (or fire signal) to thyratron SCR.
Premature ignition angle delay circuit piece 12 is in parallel with premature ignition angle control circuit piece 10.By the minimum premature ignition angle signal (signal at node C place among the figure) of above-mentioned pulse signal input circuit piece 8 outputs, and the pulse control voltage pulse signal of being exported by above-mentioned pulse control voltage pulse generation circuit block 9 (signal at node D place among the figure) also inputs to circuit block 12.As below will describing in detail, the output terminal of premature ignition angle delay circuit piece 12 connects premature ignition angle control circuit piece 10. Circuit block 10 and 12 is by comparator power supply circuit piece 11 supply powers.
With reference now to Fig. 2 to Fig. 8,, below in detail each circuit block will be described in detail.The structure of power supply circuit piece 5 as shown in Figure 2.This circuit block 5 has a constant voltage terminal, and being used for provides voltage vcc to each circuit of control circuit 2.
The structure of thyratron trigger circuit piece 6 is seen Fig. 3.This circuit block 6 comprises a triode Q1, and it is connected when receiving from premature ignition angle control circuit piece 10 sends premature ignition angle control signal.When triode Q1 connects, provide a thyratron trigger signal to thyratron SCR.
The structure of pulser signal input circuit piece 8 is referring to Fig. 4.In the present embodiment, the maximum premature ignition angle pulse signal of being exported by pulser coil 7 is a positive signal, and the minimum premature ignition angle pulse signal of being exported by pulser coil 7 is a negative signal.Maximum premature ignition angle pulse signal is connected triode Q2, and minimum premature ignition angle pulse signal is connected triode Q3.The connection signal of triode Q2 sends pulse control voltage pulse generation circuit block 9 to, and as maximum premature ignition angle signal, on the other hand, the connection signal of triode Q3 sends circuit block 9 and 10 to, as minimum premature ignition angle signal.
As shown in Figure 5, in pulser control voltage pulse generation circuit block 9, triode Q4, Q5, Q6 and Q7 form trigger circuit.When maximum premature ignition angle signal conducting that triode Q4 is produced by the triode Q2 of make pulse signal input circuit piece 8, triode Q5 conducting.The result makes triode Q7 conducting, the signal of triode Q7 conducting and the same premature ignition angle control circuit piece 10 and the comparator power supply circuit piece 11 of inputing to simultaneously of above-mentioned pulse control voltage pulse signal.When triode Q6 by by the minimum premature ignition angle signal conducting of connecting that triode Q3 produces the time, triode Q7 ends, thus the output of break impulse control voltage pulse signal.
The structure of premature ignition angle control circuit piece 10 is seen Fig. 6.The minimum premature ignition angle signal of the triode Q3 output in the pulser signal input circuit piece 8 is with the triode Q8 conducting in the circuit block 10.This will make capacitor C2 fully charge (to voltage vcc).Then, when triode Q8 ended, capacitor C2 began through resistance R 1 discharge.On the other hand, the Continuity signal of the triode Q7 of pulser control voltage pulse generation circuit block 9 passes through triode Q9 with triode Q10 conducting, and while turn-on transistor Q11.When triode Q11 ended, capacitor C3 was charged to voltage Vd by the voltage divider that is made of resistance R 2 and R3.When turn-on transistor Q11, capacitor C3 is discharged by resistance R 4.
The voltage of capacitor C2, C3 is transfused to the premature ignition angle and shifts to an earlier date comparator C P1.One low level signal of comparator C P1 output passes through triode Q12 with triode Q13 conducting, and the output signal of triode Q13 continues to be input to thyratron trigger circuit piece 6.
The structure of comparator power supply circuit piece 11 is seen Fig. 7.Triode Q7 Continuity signal in the pulser control voltage pulse generation circuit block 9 is with triode Q14 conducting, and it is with triode Q15 conducting.This will make triode Q20 conducting.Like this, power controlling supply voltage vcc offers comparator C P1 in the premature ignition angle control circuit piece 10 by triode Q20.
Be used for as shown in Figure 8 in a structure that presets the circuit block 12 of post ignition time in the high engine speed scope.The low level signal at node C place is with triode Q16 conducting, and C5 charges to capacitor.After triode Q16 ended, capacitor C5 was with a very first time constant discharge relevant with resistance R 5, then, when the high level signal turn-on transistor Q17 of node D, capacitor C5 discharges with one second time constant, owing to added resistance R 6, this time constant is less than very first time constant.
The signal of node I promptly with the relevant current potential of voltage at capacitor C5 two ends of charging, is provided for premature ignition angle delay comparator CP2.The reference voltage Uj of the voltage divider output that is made of resistance R 7 and R8 also is input to comparator C P2.When the triode Q15 in the comparator power supply circuit piece 11 connected, power controlling supply voltage vcc offered comparator C P2 by triode Q18, and triode Q18 response inputs to the signal of premature ignition angle delay circuit piece 12 and is switched on.The output terminal of comparator C P2 is connected to the node K in the premature ignition angle control circuit piece 10.When the signal of node I during greater than reference voltage Uj, the output terminal of comparator C P2 is a low-signal levels, forces the triode Q13 in the circuit block 10 to end, and prevents the generation of trigger signal (or fire signal), thus the post ignition time.
With reference now to the waveform of Fig. 9 and Figure 10, the operation of the control circuit 2 of said structure is described.The sinusoidal wave signal that is essentially that is produced by drive coil 1 offers terminal EXT, offers terminals P C by pulser coil 7 at the pulse signal that each minimum and maximum premature ignition angle produces simultaneously.In the present embodiment, when when node A observes, arteries and veins station signal when with maximum premature ignition angular correlation for just, and when with minimum premature ignition angular correlation for negative, shown in uppermost waveform among Fig. 9.
The pulse signal at node A place inputs to pulser input circlult piece 8 and by shaping, the shaped pulse signal relevant with full aduance of circuit block 8 outputs is shown in the waveform at Node B place, and the shaped pulse signal relevant with minimum advance angle is shown in the waveform at node C place.The signal of Node B and C continues to be input to the pulser control voltage pulse generation piece 9 that produces a rectangular wave, and in the present embodiment, this rectangular wave rises at each full aduance, and descends in each minimum advance angle, shown in the waveform of node D among Fig. 9.
The high level signal at node D place offers premature ignition angle control circuit piece 10, and with triode Q9 in the circuit block 10 and Q11 conducting, and triode Q9 is with triode Q10 conducting.The high level signal at node D place also offers comparator power supply circuit piece 11 and with its excitation.Like this, comparator power supply circuit piece 11 was worked in the time corresponding to the high level signal width at node D place, by triode Q20 normal pressure Vcc was passed to comparator C P1 in the premature ignition angle control circuit piece 10, made comparator C P1 work.Just work when like this, comparator only produces signal at node D place.
Signal below in conjunction with node E in Fig. 9 explanatory drawing 6 and F place.These signals are input signals of comparator C P1.
At the rising edge of the high level signal at node D place, the current potential at node E place begins to rise with the time constant by capacitor C2 and resistance R 9 decisions.When the high level signal at node D place disappeared, triode Q10 disconnected.Then, the low level pulse signal at node C place is connected triode Q8, at short notice capacitor C2 is fully charged to normal pressure Vcc.After the low level signal at node C place disappeared, capacitor C2 reduced the current potential at node E place by resistance R 1 discharge gradually, the next high level signal turn-on transistor Q10 until node D place, as shown in Figure 9.
High level signal at node D place makes triode Q11 conduction period, capacitor C3 discharge, and the current potential at node F place descends from predetermined value Vd.When the high level signal at node D place disappeared, the current potential at node F place began to increase with the time constant by capacitor C3 and resistance R 2 and R3 decision, is back to described presetting potential Vd.
The signal at node E of Gai Bianing and F place is input to comparator C P1 in a manner described.As shown in Figure 9, when the signal level at node E place surpassed the signal level at node F place, comparator C P1 placed low potential L with node G.
Because it is the voltage drive that provided by comparator power supply circuit piece 11 that the premature ignition angle shifts to an earlier date comparator C P1, when the high level signal at node D place disappears, promptly when reaching possible premature ignition angle control range terminal, comparator C P1 is interrupted work, and the current potential of node G returns original size, as shown in Figure 9.When node G is compared device CP1 and places low-signal levels, triode Q13 conducting, the signal of triode Q13 conducting is sent to thyratron trigger circuit piece 6, the triode Q1 in the turning circuit piece 6.
As mentioned above, when triode Q1 conducting, main capacitor C1 is discharged by thyratron SCR selectively, and discharge current offers the primary air of spark coil system 3 by terminal IGN, thereby produces igniting by the spark plug 4 of the secondary winding that is connected to spark coil system 3.
By this way, an intersection point of the potential curve at node E and F place is determined the firing time (premature ignition angle) on the predetermined engine speed scope.Concerning the signal level variation at node E place, along with the increase of engine speed, when discharge more just begins charging, shown in the dotted line waveform of node E among the figure.This causes Ti firing time who more shifts to an earlier date.On the contrary, when engine speed reduced, discharge time was elongated, caused a less premature ignition time T i.
When engine speed is higher when making the waveform at node E place be positioned on the waveform at node F place, shown in two waveforms on Figure 10, comparator C P1 and maximum premature ignition angle signal DF side by side place low level with node G, and turn-on transistor Q12 is to produce fire signal at maximum premature ignition angle DF.
The following describes according to Control Engine speed of the present invention and surpass a situation when presetting high speed NR.Above presetting under the situation of high speed NR, the signal level at node E place all is higher than the signal at node F place at any time, as mentioned above at engine speed.According to the present invention, premature ignition angle delay circuit piece 12 can remain on low-signal levels with the node K in the premature ignition angle control circuit piece 10, preventing to connect the triode Q13 in the circuit block 10, otherwise transistor Q13 will be switched on and produce fire signal at maximum premature ignition angle DF.
Particularly, the output terminal of the comparator C P2 in the premature ignition angle delay circuit piece 12 is connected to the node K in the premature ignition angle control circuit piece 10.As mentioned above, the capacitor C5 responsive node C in the circuit block 12 and the signal at D place discharge and recharge.The signal at the node I place that interrelates with capacitor C5 both end voltage, and reference voltage Vj inputs to comparator C P2.As long as the signal of node I is greater than reference voltage Vj, comparator C P2 just remains on low-signal levels with its output terminal.The point (by the Ti mark among Figure 10) that signal curve and reference voltage Vj at node I place intersects, comparator C P2 no longer remains on low-signal levels with its output terminal, the current potential of node K is raise with the triode Q13 in the connection circuit block 10, thereby produce igniting at the premature ignition angle that is postponing.
When engine speed increased, the signal level at node I place uprised, shown in the dotted line among Figure 10.This makes the signal at node I place and the close minimum premature ignition angle DS of intersection point of reference voltage Vj, produces the firing time that more postpones.Like this, be delayed firing time when engine speed surpasses preset speed NR.Because igniting does not stop fully, avoided reducing suddenly of power, thereby can obtain level and smooth power control.
When engine speed is higher when making the signal of node I be not less than reference voltage, comparator C P2 remains on low-signal levels with node K in the whole time of its work.According to the present invention, have one to trigger (hard-trigger) circuit block 13 firmly in the present embodiment, as shown in Figure 8.This hard trigger circuit piece 13 contains a triode Q19, and it is by low level signal (the minimum premature ignition angle signal) conducting at node C place.The signal of triode Q19 conducting is the triode Q13 conducting in the premature ignition angle control circuit piece 10, thereby produces an igniting signal at minimum premature ignition angle DS.Like this, in the velocity range that is higher than high engine speed scope, along with the increase premature ignition of engine speed is contended and gradually is delayed, the control ignition time to be keeping minimum premature ignition angle DS, thereby obtains good engine power control.
As mentioned above, in this circuit, when node D place produced high level signal, the discharge time constant of the signal at node I place diminished, the signal at node I place is intersected at bigger angle and reference voltage Vj, postpone control thereby can obtain accurate premature ignition angle in high engine speed scope.
In addition, because comparator C P2 is provided with power controlling supply voltage vcc by triode Q18, and triode Q18 is connected by the signal of comparator power supply circuit piece 11 outputs, thereby comparator C P2 only just is driven in the time corresponding to the possible control range at premature ignition angle, thereby eliminated unnecessary power consumpiton, saved electric energy.
Therefore, according to the present invention, be implemented in to be higher than with a reference voltage by the discharge waveform of a CR circuit relatively and preset the control of high engine speed scope at a high speed the delay of premature ignition angle, thereby by using one to comprise that the ball bearing made using of a CR circuit and a comparator has realized in the control of high engine speed scope to engine power, thereby saved expense.
Claims (5)
1. internal-combustion engine ignition control system comprises:
By produce one with the maximum of maximum premature ignition angular correlation igniting angle signal, and device that limits the possible control range at premature ignition angle with the minimum ignition angle signal of minimum premature ignition angular correlation;
One first circuit has an output terminal, and this circuit is used for producing a signal level variation at its output terminal, may produce an igniting signal in the control range the above-mentioned of premature ignition angle;
A second circuit, the signal level variation that is used to forbid first circuit output end, until reaching a premature ignition angle, this premature ignition angle exceeds the increase of a predetermined engine speed according to engine speed and is postponed from maximum premature ignition angle.
2. the Iganition control system of claim 1, second circuit wherein comprises:
One capacitor;
One reference voltage generating circuit;
One charging circuit was used for charging to a preset voltage to above-mentioned capacitor in the time corresponding to the pulsewidth of above-mentioned minimum premature ignition angle signal;
One discharge circuit is used in that minimum premature ignition angle signal disappears in the time that minimum premature ignition angle signal produces to the next one above-mentioned capacitor discharge from one;
One comparator, the voltage and the above-mentioned reference voltage that are used for more above-mentioned capacitor two ends, wherein this comparator output terminal is connected to the output terminal of first circuit, when the voltage at above-mentioned capacitor two ends is higher than above-mentioned reference voltage, comparator remains on a preset signal level with its output terminal, with the variation of the signal level that prevents first circuit.
3. the Iganition control system of claim 2, discharge circuit wherein comprises:
One first discharge circuit is used for a very first time constant described capacitor being discharged in the very first time interval that the extremely maximum premature ignition angle signal that disappears from minimum premature ignition angle signal produces;
One second discharge circuit is used for one second time constant described capacitor being discharged in second time lag that produces the minimum premature ignition angle signal generation to next from maximum premature ignition angle signal, and second time constant is less than very first time parameter.
4. arbitrary described Iganition control system in the claim 1 to 3 also comprises a tertiary circuit, is used for producing a fire signal with minimum premature ignition angle.
5. arbitrary described Iganition control system in the claim 2 to 4, wherein second comparator only just is driven in second time lag.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32708/96 | 1996-01-26 | ||
| JP03270896A JP3281252B2 (en) | 1996-01-26 | 1996-01-26 | Ignition control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1162068A true CN1162068A (en) | 1997-10-15 |
| CN1059017C CN1059017C (en) | 2000-11-29 |
Family
ID=12366351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97102151A Expired - Fee Related CN1059017C (en) | 1996-01-26 | 1997-01-24 | Ignition control system |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3281252B2 (en) |
| CN (1) | CN1059017C (en) |
| IT (1) | IT1289924B1 (en) |
| TW (1) | TW338090B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100590315C (en) * | 2005-08-19 | 2010-02-17 | 樊荣群 | Intelligent entrance angle speed-limiting igniter |
| CN102852692A (en) * | 2011-07-01 | 2013-01-02 | 伍德沃德公司 | Multiplexing drive circuit for AC ignition system with current mode control and fault tolerance detection |
| CN102996316A (en) * | 2011-09-13 | 2013-03-27 | 光阳工业股份有限公司 | Ignition control device for engine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8342661B2 (en) | 2007-12-19 | 2013-01-01 | Canon Finetech Inc. | Ink supplying apparatus, inkjet printing apparatus, inkjet printing head, ink supplying method and inkjet printing method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87201269U (en) * | 1987-04-20 | 1988-05-18 | 孙志明 | Silicon controlled high efficient igniter of automobile and motor cycle |
| CN2044649U (en) * | 1989-03-02 | 1989-09-20 | 朱健声 | Capacitor discharging electronic ignition system |
| CN2088171U (en) * | 1990-12-08 | 1991-11-06 | 张洪才 | Multi-spark ignitor for automobile |
-
1996
- 1996-01-26 JP JP03270896A patent/JP3281252B2/en not_active Expired - Fee Related
-
1997
- 1997-01-08 TW TW086100153A patent/TW338090B/en not_active IP Right Cessation
- 1997-01-21 IT IT97MI000104A patent/IT1289924B1/en active IP Right Grant
- 1997-01-24 CN CN97102151A patent/CN1059017C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100590315C (en) * | 2005-08-19 | 2010-02-17 | 樊荣群 | Intelligent entrance angle speed-limiting igniter |
| CN102852692A (en) * | 2011-07-01 | 2013-01-02 | 伍德沃德公司 | Multiplexing drive circuit for AC ignition system with current mode control and fault tolerance detection |
| CN102852692B (en) * | 2011-07-01 | 2017-03-01 | 伍德沃德公司 | For having the multiplex drive circuit of the AC ignition system of Controlled in Current Mode and Based and fault tolerance detection |
| CN102996316A (en) * | 2011-09-13 | 2013-03-27 | 光阳工业股份有限公司 | Ignition control device for engine |
| CN102996316B (en) * | 2011-09-13 | 2015-04-01 | 光阳工业股份有限公司 | Ignition control device for engine |
Also Published As
| Publication number | Publication date |
|---|---|
| ITMI970104A1 (en) | 1998-07-21 |
| CN1059017C (en) | 2000-11-29 |
| JPH09203366A (en) | 1997-08-05 |
| TW338090B (en) | 1998-08-11 |
| IT1289924B1 (en) | 1998-10-19 |
| JP3281252B2 (en) | 2002-05-13 |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20001129 Termination date: 20120124 |