CN1495352A - Exhaust timing controller for two-stroke engine - Google Patents
Exhaust timing controller for two-stroke engine Download PDFInfo
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- CN1495352A CN1495352A CNA031378846A CN03137884A CN1495352A CN 1495352 A CN1495352 A CN 1495352A CN A031378846 A CNA031378846 A CN A031378846A CN 03137884 A CN03137884 A CN 03137884A CN 1495352 A CN1495352 A CN 1495352A
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- control system
- engine
- internal combustion
- combustion engine
- control
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- Y02T10/146—
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- Y02T10/18—
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- Y02T10/46—
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- Y02T10/47—
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- Combined Controls Of Internal Combustion Engines (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
A method and apparatus that permits engine system control such as exhaust valve timing without the use of separate load sensors from the output of a single engine timing sensor.
Description
Related application for reference
The application is entitled as the part continuation application that " engine control and device ", application number are 09/682457, are filed in the application of awaiting the reply in September 5 calendar year 2001 with we and another inventor's name; This application is transferred the possession of in its assignee.
Technical field
The present invention relates to a kind of engine control system that is used to control the engine system except that ignition system, more particularly, relate to a kind of engine valve control system, for example the exhaust-control valve of two stroke engine.
Background technique
The above-mentioned application of awaiting the reply has disclosed a kind of very simple but high-efficiency method, and this method can be determined engine load and control engine igniting system to improve the operation of motor in response to predetermined load.Because the simplicity of this kind method and apparatus, it can be combined in less, the lower relatively motor of production capacity, for example uses in the engine application of motorcycle, scooter and so on.
Except ignition system, the inventor has realized that and has many other engine control systems by engine load control that engine load is measured according to operator's needs usually by these systems, is determined by the position of engine throttle gate control usually.For example, in two stroke engine, adopt a kind of exhaust timing controller usually.It comprises a valve, and therefore the discharging that this valve can change the floss hole place effectively regularly and changes compression ratio (such as referring to JP-A-S54-158514) in response to the revolution and the load of motor.Traditionally, traditional exhaust timing controller detects throttle opening in response to the rotational speed and the engine load of motor, calculate the valve opening of exhaust-control valve then based on detected engine rotary speed and throttle opening, so that the servomotor operation, and make the exhaust-control valve operation successively.
Use engine load sensor to detect throttle opening in conventional exhaust timing controller and other engine control system except that ignition system, this can cause the number of components to increase and control system becomes complicated.This has obviously increased the vehicle cost.In addition, especially for dilly,, can produce the location arrangements problem of multiple member (especially throttle position sensor) because the space around the motor is limited.
Therefore, main purpose of the present invention provides a kind of engine system controller, this controller can be under the situation of not using throttle position sensor calculation engine load.
In addition, most of motors have had the main spindle's sensor, and this sensor can detect the position, angle of the engine crankshaft that is used for IGNITION CONTROL.
Therefore, another purpose of the present invention is to utilize the output of ignition timing sensor to be identified for controlling the engine load of the engine system except that ignition system.
Summary of the invention
First feature of the present invention is suitable to be implemented in internal-combustion engine and the control system thereof.Motor has regularly sensor of a motor driven shaft and, and this Time Pick-off Units is associated with this axle, in order to the position, angle of indication driven shaft.Motor comprises a engine control system except that ignition system, removes power operation lighting a fire in order to control.Other engine control system is by the output control of Time Pick-off Units.
According to another characteristic of the invention, the valve of other engine control system control motor regularly.
According to another feature of the present invention, the valve of motor is regularly controlled by the discharging timing valve of two stroke engine.
Description of drawings
Fig. 1 is the diagrammatic sketch that shows the engine spindle velocity transducer that adopts engine system control structure of the present invention and method.
Fig. 2 is the plotted curve that shows the output of sensor shown in Figure 1.
Fig. 3 is the positive side view of two stroke IC engine, and its part illustrates with the sectional view that the cylinder along motor intercepts.
Fig. 4 is the sectional view along the intercepting of the line 4-4 among Fig. 3.
Fig. 5 is the diagrammatic sketch of the relation between Displaying timer sensor and the engine emission valve control.
Fig. 6 is the positive side view of valve-controlled servomotor.
Fig. 7 is the sectional view along the intercepting of the line 7-7 among Fig. 6.
Fig. 8 is the schematic representation that shows the escape cock control system.
Embodiment
Before being described in detail the present invention in conjunction with the accompanying drawings, this paper will quote above-mentioned await the reply the application announcement as a reference, this application shows the more details of the motor that can adopt fundamental type of the present invention, and a basic ignition control gear and a method.Yet, also be believed that, those skilled in the art can easily understand how not only to adopt basic structure shown in this application and methodology from following explanation, and adopt the multiple engine system that needs definite engine load to control and realize the present invention.
Please in detail referring to accompanying drawing, at first see also Fig. 1 now, timing of engine sensor is described as such as relevant with a motor driven shaft element of any related internal-combustion engine that needs type.Specifically, fixedly flywheel 11 is in order to rotate with engine spindle, and in the present embodiment, this engine spindle is a bent axle 12.Well-known as those skilled in the art, support this bent axle 12, so that it rotates in engine body.Flywheel 11 carries certain time sign 13, has the circumferential lengths longer than the timing index of common use in the art as above-mentioned this timing index described in the application that awaits the reply.In preferred embodiment, the circumferential lengths of sign 13 is about 60 ° of crankshaft rotating, and locate before by the several years at top dead center (tdc) for the leading edge of sign 13.
One cell winding 14 is cooperated mutually with timing index 13, and produces positive and negative pulse during by sensor in the front and rear edges of timing index 13.These pulses roughly are shown among Fig. 2 roughly.The rotation of remaining part does not produce output and is illustrated among Fig. 2 yet.Traditional ignition timing sensor can be used for cell winding 14.
Time lag T between two leading edge pulse signals is that main shaft 12 is finished one and changeed the used time, thereby the instantaneous spindle speed that is used for this commentaries on classics is the function that falls in this time lag.On the other hand, timing index 13 is that main shaft 12 was finished the used instantaneous time of a part of turn over before tdc by cell winding 14 used time lag t.
As described in the above-mentioned application of awaiting the reply, the ratio t/T that is calculated as rotation change degree " D " is directly related with engine load.Thereby, use the mapping in the storage that is stored in microcomputer to determine engine load.As for mapping, by the correlation between definite rotation change degree, crankshaft rotating speed and the engine loads such as preliminary experiment, the three-dimensional mapping that is obtained is stored in the storage.Thereby the escape cock that can use these data to set to be used for motor regularly.
Please in detail referring to all the other accompanying drawings, at first see also Fig. 3 and 4 now, show two stroke IC engine and always represent by label 15.Motor comprises a cylinder head 16, and this cylinder head is anchored on the top of cylinder block 17 by a plurality of fastening pieces 18, only shows a fastening piece among the figure.
One inlet 27 passes to cylinder sidewall 21.One suction passage 28 is connected with inlet 27.This suction passage 28 comprises that one has the vaporizer 29 of air throttle 31, and this air throttle 31 is installed near in the suction passage 28 in vaporizer 29 downstream sides.The one valve opening sensor by dotted line diagram and label 32 expressions can be used to detection of engine load usually, and this sensor is provided traditionally.In an embodiment of the present invention, come calculation engine load, therefore under unwanted situation, omitted engine load sensor 32 based on above-mentioned engine rotary speed.
One floss hole 33 is formed on the opposite side of the inlet 27 in the cylinder sidewall 21, and its position is higher than inlet 27.One discharge passage 34 is formed with floss hole 33 and is connected, and is connected with the releasing system (not shown) of any known type, in order to discharge the exhaust in the atmosphere.
One exhaust-control valve 35 has the roughly cross section of semicircular in shape, and can be any discharging required type regularly that is used to control, and this exhaust-control valve is bearing in the upper edge of floss hole 33.As top described, this will change the compression ratio of motor with respect to load.Illustrated among Fig. 4 the cross section roughly semicircular in shape and shape like the exhaust-control valve 35 of hourglass.Exhaust-control valve 35 has a running shaft 36, and this running shaft is bearing on the side of cylinder block by bearing 37.
Control the rotational position of exhaust-control valve 35 by a pulley 37, this pulley 37 links to each other with an end of running shaft 36.This pulley 37 is operated by the mechanism shown in Fig. 5-7 the best.As shown in these figures, one has a live axle 39, one drive pulley 41 by the 38 servomotor unit of always representing and is fixed in this live axle.Transmitting wire 42 is wound on around the drive pulley 41.This wire 42 links to each other with the pulley 37 of exhaust-control valve side by two exterior tube 43.
As mentioned above, the cell winding 14 on the flywheel 11 detects timing index 13, and links to each other with a control unit 44.The mode that this control unit 44 is narrated in conjunction with Fig. 8 with the back based on the signal that transmits from cell winding 14 is controlled motor unit 38.In practice, control unit 44 is combined in the housing 45 of motor unit 38.
As shown in Figure 6, motor unit 38 is installed in servomotor 46 in the housing 45 of motor unit 38.The output shaft of servomotor 46 links to each other with live axle 39 by the train of reduction gears (not shown) that is arranged in gear-box 47.As shown in Figure 7, a small gear 48 is connected to the end of live axle 38.One potentiometer 49 is configured to match with small gear 48.Potentiometer 49 detects the rotational position of live axle 39.As described, live axle 39 links to each other with pulley 37, in order to by drive pulley 41 that is fixed in live axle and 35 opening and closing of wire 42 operation control valves.Therefore, detect the valve opening of exhaust-control valve 35 by potentiometer 49.
In said structure, when servomotor 46 rotates forward or backwards based on the rotating amount edge that is calculated by control unit 44, be fixed in drive pulley 41 rotations of live axle 39, and therefore make pulley 37 rotations by wire 42.This will make exhaust-control valve 35 (Fig. 4) rotation on the running shaft 36, that link to each other with pulley 37, so that its opening and closing, the upper end position (as shown in Figure 3) of change floss hole 33, with the control discharging regularly.
To narrate in conjunction with Fig. 8 now provides this control and realizes system of the present invention.As described, use the output of cell winding 14 to determine engine load.When calculation engine load, can be with the change of rotation change degree a parameter as a mapping.That is to say, after calculating above-mentioned rotation change degree D=t/T, similarly, measure next commentaries on classics and detect t detection time of projection track at it " and period T, and ratio calculated t "/T ".Calculate the difference (t/T-t "/T ") between these two rotation change degree, with its change D " as the rotation change degree.Can " come calculation engine load based on D.
Now please especially referring to Fig. 8, under control, drive by servomotor 46 and to be used to control discharging exhaust-control valve 35 regularly by 51 control units of always representing so that its along just-opposite spin.Control unit 51 is provided with a waveform shaping circuit 52, and this circuit links to each other with the output of cell winding 44.Rotational speed counting circuit 53 and rotation change degree counting circuit 54 receive the output of waveform shaping circuit 52.
One LOAD FOR circuit 55 is based on rotation change degree calculation engine load.As described, this can be by being accomplished in conjunction with a mapping.A valve opening counting circuit 56 calculates the aperture of exhaust-control valves 35 then, so that the optimum discharge that is provided for driving operating mode in response to rotational speed and engine load regularly.
Then this output is sent to motor drive circuit 57, so that based on the valve opening control servomotor 46 that calculates.Motor drive circuit 57 is provided with a comparison circuit 58, so that the current aperture of exhaust-control valve 35 and the aperture of calculating are made comparisons.One valve opening testing circuit 59 also detects the current aperture of exhaust-control valve 35, and a positive despining instruction circuit 61 is used for instruction is sent to servomotor 46, so that it is along rotation forward or backwards.
Waveform shaping circuit 52 produces rotation detection signal b aforesaid, shown in Figure 2 based on the testing signal that is provided by cell winding 14.Rotational speed counting circuit 53 calculates the rotational speed N that is determined by time lag T.Rotation change degree counting circuit 54 calculates variables D based on above-mentioned rotation detection signal T.LOAD FOR circuit 55 is based on the rotation change degree D calculation engine load L that calculates.Based on by the preliminary experiment established data, allow the one dimension mapping to use rotation change degree D as parameter, perhaps allow two-dimensional map to use rotation change degree D and rotational speed N as parameter, these parameters all are stored in the storage of CPU.This mapping can be used to calculation engine load.
Valve opening counting circuit 56 calculates the target valve apertures with control exhaust-control valve 35, thereby the optimum discharge that is provided for driving operating mode based on the rotational speed N that calculates and engine load L regularly.Based on by such as the preliminary experiment established data, allow two-dimensional map to use rotational speed N and engine load L as parameter, these parameters all are stored in the storage of CPU.This mapping can be calculated the target valve aperture.
Use rotation change degree D and rotational speed N can be used for mapping, so that under the situation that can't determine engine load based on rotation change degree D, calculate valve opening as parameter.Also can determine valve opening based on this mapping.Under such a case, rotation change degree counting circuit 54 and LOAD FOR circuit 55 will be combined into single counting circuit, and this circuit combines this two functions.
Valve opening testing circuit 59 detects the current aperture of exhaust-control valve 35 based on the motor position that measures by the potentiometer in the servomotor 46 49.Comparison circuit 58 will be made comparisons by valve opening testing circuit 59 detected current valve openings and the target valve aperture that calculates by valve opening counting circuit 56, and definite exhaust-control valve 35 is along the valve discharge capacity of unlatching or closing direction, so that eliminate difference.Comparison circuit calculates the amount of being driven of servomotor 46 then, so that it is in response to the rotation forward or backwards of discharge capacity edge.A positive despining instruction circuit 61 drives servomotor 46 based on the amount of being driven of the servomotor that calculates by comparison circuit 58.
Thereby, should be understood that described structure can control the engine system such as its escape cock control system effectively under the situation that does not need separate load.Certainly, those skilled in the art are understandable to be, described embodiment only is preferred embodiment, can make multiple variation and modification under the situation of the spirit and scope of the present invention that do not deviate from the appending claims qualification.
Claims (12)
1. control system for internal combustion engine, it comprises: a motor driven shaft; One timing sensor, described Time Pick-off Units is associated with described axle, in order to indicate the position, angle of described driven shaft; One engine control system except that ignition system, described engine control system are used to control the power operation except that igniting, and described other engine control system is controlled by the output of described Time Pick-off Units.
2. control system for internal combustion engine as claimed in claim 1, it is characterized in that, described Time Pick-off Units is less than the instantaneous rotational speed that detects described driven shaft during the rotation of a turn at described driven shaft, and detect that described driven shaft is used for a turn over and comprise the rotational speed that measures less than a turn over, and determine the base regime of motor according to these measured values, so that control other engine control system.
3. control system for internal combustion engine as claimed in claim 2 is characterized in that, determines the base regime of motor by the variation of engine speed during consecutive intervals.
4. control system for internal combustion engine as claimed in claim 3 is characterized in that described Time Pick-off Units comprises a single-sensor.
5. control system for internal combustion engine as claimed in claim 4 is characterized in that, under the situation without any other sensor input, the operation of other engine control system is only in response to detected rotational speed state.
6. control system for internal combustion engine as claimed in claim 1 is characterized in that, a valve of other engine control system control motor regularly.
7. control system for internal combustion engine as claimed in claim 6 is characterized in that, valve is regularly controlled by escape cock.
8. control system for internal combustion engine as claimed in claim 7 is characterized in that, described motor moves according to the two-stroke principle.
9. control system for internal combustion engine as claimed in claim 8, it is characterized in that, described Time Pick-off Units is less than the instantaneous rotational speed that detects described driven shaft during the rotation of a turn at described driven shaft, and detect that described driven shaft is used for a turn over and comprise the rotational speed that measures less than a turn over, and determine the base regime of motor according to these measured values, so that control other engine control system.
10. control system for internal combustion engine as claimed in claim 9 is characterized in that, determines the base regime of motor by the variation of engine speed during consecutive intervals.
11. control system for internal combustion engine as claimed in claim 9 is characterized in that, described Time Pick-off Units comprises a single-sensor.
12. control system for internal combustion engine as claimed in claim 11 is characterized in that, under the situation without any other sensor input, the carrying out of valve timing control is only in response to detected rotational speed state.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002156587A JP2003343292A (en) | 2002-05-30 | 2002-05-30 | Exhaust timing controller for two-stroke cycle engine |
| JP2002156587 | 2002-05-30 | ||
| US10/249,986 US6895908B2 (en) | 2000-10-12 | 2003-05-23 | Exhaust timing controller for two-stroke engine |
| US10/249986 | 2003-05-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1495352A true CN1495352A (en) | 2004-05-12 |
Family
ID=34277053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031378846A Pending CN1495352A (en) | 2002-05-30 | 2003-05-30 | Exhaust timing controller for two-stroke engine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1495352A (en) |
| TW (1) | TW200404955A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168171A (en) * | 2015-05-19 | 2016-11-30 | 温特图尔汽柴油公司 | The operation method of large-sized diesel motor, its purposes and large-sized diesel motor |
| CN106437926A (en) * | 2016-12-15 | 2017-02-22 | 天津梦佳智创科技发展有限公司 | Low-energy-consumption internal combustion engine rotary air valve |
-
2003
- 2003-05-30 CN CNA031378846A patent/CN1495352A/en active Pending
- 2003-05-30 TW TW92114965A patent/TW200404955A/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168171A (en) * | 2015-05-19 | 2016-11-30 | 温特图尔汽柴油公司 | The operation method of large-sized diesel motor, its purposes and large-sized diesel motor |
| CN106437926A (en) * | 2016-12-15 | 2017-02-22 | 天津梦佳智创科技发展有限公司 | Low-energy-consumption internal combustion engine rotary air valve |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200404955A (en) | 2004-04-01 |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |