CN203364847U - Crankshaft position detection device and crankshaft signal wheel - Google Patents
Crankshaft position detection device and crankshaft signal wheel Download PDFInfo
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- CN203364847U CN203364847U CN 201320209477 CN201320209477U CN203364847U CN 203364847 U CN203364847 U CN 203364847U CN 201320209477 CN201320209477 CN 201320209477 CN 201320209477 U CN201320209477 U CN 201320209477U CN 203364847 U CN203364847 U CN 203364847U
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- tooth
- narrow
- signal wheel
- crankshaft signal
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Abstract
The utility model discloses a crankshaft position detection device which comprises a crankshaft signal wheel, a sensor and a controller, wherein a gear teeth lacking region, two standard gear teeth regions and a narrow gear teeth region are arranged on the periphery of the crankshaft signal wheel; the two standard gear teeth regions are used for separating the gear teeth lacking region from the narrow gear teeth region; a plurality of standard gear teeth are uniformly distributed on each standard gear teeth region; the gear teeth lacking region lacks one or a plurality of gear teeth; a plurality of narrow gear teeth are uniformly distributed on the narrow gear teeth region; each narrow gear tooth is narrower than each standard gear tooth; the distance between two tooth crests on the narrow gear teeth region is smaller than that on the standard gear teeth region; the sensor is mounted on the periphery of the crankshaft signal wheel and is used for outputting pulse electric signals to the controller with the rotation of the crankshaft signal wheel; and the controller distinguishes the crankshaft position according to the space change of the falling edges of the pulse electric signals output by the sensor. The utility model further discloses the crankshaft signal wheel. The crankshaft position detection device and the crankshaft signal wheel can improve the speed for distinguishing the crankshaft position.
Description
Technical field
The utility model relates to the control technology of electric-control motor, particularly a kind of crank position pick-up unit and crankshaft signal wheel.
Background technology
In the Electronic Control process of electric-control motor, at first must identify according to the crankshaft signal of sensor collection the engine current location, then just can carry out and the closely-related control operation of engine location.The recognition speed of engine location has directly affected engine start speed.
Existing crank position pick-up unit, that the crankshaft signal wheel is coaxially fixedly mounted with bent axle, described crankshaft signal wheel is ferromagnetic component, and the uniform some teeth of outline (common form is 60 or 36 or 24 teeth), wherein remove 1 or 2 continuous tooth to form special identification point; Crankshaft position sensor is converted to electric signal by profile of tooth and is sent to controller, the specific identification that controller detects wherein puts to obtain crank position, be the current position of engine, Figure 2 shows that existing 36 teeth lack the electric signal of 2 tooth crankshaft signal wheels, adjacent twice signal identification point interval 360 degree.Controller detects the bent axle identification point angle that bent axle turns over before and has directly determined the consuming time of location recognition.Existing crank position pick-up unit, the crankshaft signal wheel only has a specific identification point, controller detects before the bent axle identification point bent axle may be needed to turn over and be greater than 180 degree, even approach 360 degree, start to rotate to that the angle that the bent axle identification point need to turn over to be detected be 0～1 circle from bent axle, average 0.5 circle, it is consuming time longer that controller detects the bent axle identification point, and the recognition speed of engine location is slower.
Chinese patent CN200947105Y discloses a kind of apparatus for measuring velocity of crankshaft, and as shown in Figure 1, flywheel 29 is coaxially installed with bent axle, and the speed of its rotation is consistent with bent axle with angle, can reflect rotational speed and the angle of bent axle, thus the reflection piston position.
At the fixing suit of flywheel 29 peripheries signal wheel, this signal wheel is ferromagnetic component, and its periphery has the signal wheel tooth top 27 of regular distribution, simultaneously, on whole signal wheel, it is signal wheel hypodontia zone 28 that a position is arranged, and this zone does not have described signal wheel tooth top 27.There is a fixed angle in this signal wheel hypodontia zone 28 with respect to the locating sleeve position of bent axle and flywheel 29 location, in order to determine the position relationship of described signal wheel hypodontia zone 28 and piston.The distribution mode of signal wheel tooth top is, the signal wheel is upper according to being uniformly distributed the setting of 60 signals wheel tooth tops, but in fact only has 58 tooth tops, and that a zone on the signal wheel lacks two teeth is thick, and this zone is exactly described signal wheel hypodontia zone 28.
Realization is arranged on the housing 24 of wheel box the rotational speed of flywheel and the sensor 22 of measurement of angle, during installation, keeps between sensor 22 measurement faces and signal wheel tooth top 27 apart from S=0.8～1mm.Soft magnet core 26 in described sensor 22 is connected with permanent magnet 23, one section employing soft magnet of wherein said measurement face, and the magnetic field that above-mentioned magnet forms extends to ferromagnetic signal wheel.When signal wheel tooth top 27 and sensor 22 measurement faces over against the time, described sensor internal magnetic field strengthens.When the measurement face of hypodontia zone 28 and sensor 22 is relative, sensor interior loop field weakening.When flywheel 29 rotation, the measurement face of sensor 22 over against signal wheel zone be signal that rule occurs while taking turns tooth top 27 regional, described sensor internal magnetic field produces regular variation, thus the signal induced electricity of generation rule is exported; When the measurement face of sensor 22 over against described hypodontia zone 28 the time, an original pulse electrical signal of generation in the electric signal of rule.Due to as previously mentioned, hypodontia zone 28 has specific setting angle, so the appearance time point of this pulse electrical signal, corresponding to certain angle of flywheel 29, again due to the relation of flywheel 29 with piston, thereby can be determined the position of the time point of this signal corresponding to piston according to this.Simultaneously, the cycle that this pulse electrical signal occurs can characterize speed of crankshaft.The output of sensor 22 is connected to the engine management device by cable 21, and the engine management device just can calculate piston position according to this signal, and according to this piston position information, the engine management device is directly controlled the plug ignition timing.When the ignition signal of engine management device output during not in best ignition timing, can directly adjust the control parameter of engine management device inside, as long as whole machinery coordinates link not occur becoming flexible, (pressure stroke at engine ends necessarily can to obtain correct ignition timing by parameter adjustment, when piston reaches the summit of stroke, firing system provides high tension spark with the compressed mixed gas work done in a gas cylinder to spark plug, and this time is exactly ignition timing.For ignition energy is maximized, ignition timing generally will shift to an earlier date certain amount, thus be to be about to arrive igniting that time of top dead centre at piston, rather than just light a fire while just in time reaching top dead centre, this lead is ignition advance angle).
The disclosed wheel of the signal with 2 continuous hypodontias of Chinese patent CN200947105Y, must sensor senses during to hypodontia information the engine management device just can get crank position (current location of engine), bent axle must turn over maximum circles before this, it is consuming time longer that the engine management device detects the bent axle identification point, and the recognition speed of engine location is slower.
The utility model content
The technical problems to be solved in the utility model is to improve the recognition speed of crank position.
For solving the problems of the technologies described above, the crank position pick-up unit that the utility model provides, comprise bent axle, crankshaft signal wheel, sensor, controller; Described crankshaft signal wheel coaxially fixedly mounts with bent axle;
Described crankshaft signal wheel, be ferromagnetic component, and its periphery has a hypodontia zone, two full-height tooths zones, a narrow tooth zone, the hypodontia zone with between narrow tooth zone by two full-height tooths zone institute intervals;
Described full-height tooth zone, be evenly distributed with a plurality of standard tooths;
Described hypodontia zone, lack one or more standard tooths;
Described narrow tooth zone, be evenly distributed with a plurality of narrow gear teeth, and the narrow gear teeth are narrow than standard tooth;
The distance of the gear tip clearance in described narrow tooth zone is less than the distance of the gear tip clearance in described full-height tooth zone;
Described sensor, be arranged on the crankshaft signal wheel peripheral, for the rotation output pulse electrical signal along with the crankshaft signal wheel, arrives described controller;
Described controller, change the identification crank position for the spacing of the negative edge of the pulse electrical signal according to the output of described sensor.
Preferably, edge after second standard-sized tooth behind the hypodontia zone of described crankshaft signal wheel, differ 180 degree with edge after first the standard-sized tooth behind the narrow tooth zone of described crankshaft signal wheel.
Preferably, described hypodontia zone, lack one or two standard tooth.
Preferably, described narrow tooth zone, be evenly distributed with two narrow gear teeth.
Preferably, the twice of the distance apart from the gear tip clearance that is more than or equal to described narrow tooth zone of the gear tip clearance in described full-height tooth zone.
Preferably, the twice of the distance apart from the gear tip clearance that equals described narrow tooth zone of the gear tip clearance in described full-height tooth zone.
Preferably, O.5 the distance between sensor measurement face and crankshaft signal wheel tooth top is more than or equal to millimeter and is less than or equal to 1.5 millimeters.
Preferably, the method for described controller identification crank position is:
The pulse electrical signal that described sensor produces, if there are four adjacent negative edges successively: first negative edge, second negative edge, the 3rd negative edge, the 4th negative edge, A
21.5A
1and A
21.5A
3, confirm edge after second standard-sized tooth behind hypodontia zone that current crank position is described crankshaft signal wheel, A
1for the time interval of first negative edge with second negative edge, A
2be the time interval of second negative edge with the 3rd negative edge, A
3it is the time interval of the 3rd negative edge with the 4th negative edge;
The pulse electrical signal that described sensor produces, if N+3 adjacent negative edge arranged: the 1st negative edge, the 2nd negative edge, the 3rd negative edge ..., a N+2 negative edge, a N+3 negative edge, N is greater than 1 positive integer, if B
11.5B
2and B
n+21.5B
n+1, confirm edge after first the standard-sized tooth behind narrow tooth zone that current crank position is described crankshaft signal wheel, B
1be the time interval of the 1st negative edge with the 2nd negative edge, B
2be the time interval of the 2nd negative edge with the 3rd negative edge, B
n+1be the time interval of N+1 negative edge with N+2 negative edge, B
n+2it is the time interval of N+2 negative edge with N+3 negative edge.
Preferably, described hypodontia zone lacks two full-height tooths, if A
22A
1and A
22A
3, after described controller is confirmed hypodontia zone that current crank position is described crankshaft signal wheel.
For solving the problems of the technologies described above, the utility model also provides a kind of crankshaft signal wheel, for ferromagnetic component, described crankshaft signal wheel periphery has a hypodontia zone, two full-height tooths zones, a narrow tooth zone, the hypodontia zone with between narrow tooth zone by two full-height tooths zone institute intervals;
Described full-height tooth zone, be evenly distributed with a plurality of standard tooths;
Described hypodontia zone, lack one or more standard tooths;
Described narrow tooth zone, be evenly distributed with a plurality of narrow gear teeth, and the narrow gear teeth are narrow than standard tooth;
The distance of the gear tip clearance in described narrow tooth zone is less than the distance of the gear tip clearance in described full-height tooth zone.
Preferably, edge after second standard-sized tooth behind the hypodontia zone of described crankshaft signal wheel, differ 180 degree with edge after first the standard-sized tooth behind the narrow tooth zone of described crankshaft signal wheel.
Preferably, described hypodontia zone, lack one or two standard tooth.
Preferably, described narrow tooth zone, be evenly distributed with two narrow gear teeth.
Preferably, the twice of the distance apart from the gear tip clearance that is more than or equal to described narrow tooth zone of the gear tip clearance in described full-height tooth zone.
Preferably, the twice of the distance apart from the gear tip clearance that equals described narrow tooth zone of the gear tip clearance in described full-height tooth zone.
Crank position pick-up unit of the present utility model, work as crankshaft rotating, full-height tooth zone, hypodontia is regional, full-height tooth is regional, narrow tooth zone successively with the measurement face of sensor over against, sensor is exported corresponding pulse electrical signal, and the different bent axle identification point in two places is arranged in this pulse electrical signal.Due to the hypodontia zone, narrow tooth zone is by two full-height tooth zone institute intervals, crankshaft rotating one circle, sensor can detect hypodontia zone and narrow tooth zone, in the pulse electrical signal of output, two place's bent axle identification points are arranged, and due to the hypodontia zone, pulse electrical signal feature corresponding to narrow tooth zone distinguished mutually, the angle that location recognition need to turn over front crankshaft can be effectively shortened in the existence of two place's identification points, two place's identification points are mutually distinguished controller can be identified respectively two place's identification points, the condition that only relies on crankshaft signal can shorten the consuming time of crank position identifying, improved the recognition speed of crank position.
The accompanying drawing explanation
In order to be illustrated more clearly in the technical solution of the utility model, below the accompanying drawing of the required use of the utility model is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the disclosed a kind of apparatus for measuring velocity of crankshaft schematic diagram of Chinese patent CN200947105Y;
Fig. 2 is the electric signal schematic diagram that existing 36 teeth lack 2 tooth crankshaft signal wheels;
Fig. 3 is an embodiment schematic diagram of crankshaft signal wheel of the present utility model;
Fig. 4 is the electric signal schematic diagram of an embodiment of crankshaft signal wheel of the present utility model;
Fig. 5 is the electric signal schematic diagram in an embodiment hypodontia zone of crankshaft signal wheel of the present utility model;
Fig. 6 is the electric signal schematic diagram in the narrow tooth of the embodiment zone of crankshaft signal wheel of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the technical scheme in the utility model is carried out to clear, complete description, obviously, described embodiment is a part of embodiment of the present utility model, rather than whole embodiment.Embodiment based in the utility model, all other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belong to the scope that the utility model is protected.
Embodiment mono-
The crank position pick-up unit, comprise bent axle, crankshaft signal wheel, sensor, controller;
Described crankshaft signal wheel coaxially fixedly mounts with bent axle;
Described crankshaft signal wheel, be ferromagnetic component, and as shown in Figure 3, the crankshaft signal wheel periphery has a hypodontia zone 13, two full-height tooth zones 12, a narrow tooth zone 11, hypodontia zone 13 with between narrow tooth zone 11 by 12 intervals, two full-height tooths zones;
Described full-height tooth zone 12, be evenly distributed with a plurality of standard tooths;
Described hypodontia zone 13, lack one or more standard tooths; Preferably, described hypodontia zone 13 lacks one or two standard tooth;
Described narrow tooth zone 11, be evenly distributed with a plurality of narrow gear teeth, and the narrow gear teeth are narrow than standard tooth; Preferably, described narrow tooth zone 11, be evenly distributed with two narrow gear teeth;
The distance of the gear tip clearance in described narrow tooth zone 11 is less than the distance of the gear tip clearance in described full-height tooth zone; Preferably, the twice of the distance apart from the gear tip clearance that is more than or equal to described narrow tooth zone 11 of the gear tip clearance in described full-height tooth zone 12, for example twice of the distance apart from the gear tip clearance that equals described narrow tooth zone 11 of the gear tip clearance in described full-height tooth zone 12;
Described sensor, be arranged on the crankshaft signal wheel peripheral, for the rotation output pulse electrical signal along with the crankshaft signal wheel, arrives described controller; Preferably, O.5 the distance between sensor measurement face and crankshaft signal wheel tooth top is more than or equal to millimeter and is less than or equal to 1.5 millimeters;
Described controller, change for the spacing of the negative edge of the pulse electrical signal according to the output of described sensor, the identification crank position, and, according to crank position information, control the plug ignition timing.
The crank position pick-up unit of embodiment mono-, work as crankshaft rotating, full-height tooth zone 12, hypodontia zone 13, full-height tooth zone 12, narrow tooth zone 11 successively with the measurement face of sensor over against, described sensor is exported corresponding pulse electrical signal, as shown in Figure 4, the different bent axle identification point in two places is arranged in this pulse electrical signal.Due to described hypodontia zone 13, narrow tooth zone 11 is by 12 intervals, two full-height tooth zones, crankshaft rotating one circle, sensor can detect hypodontia zone 13 and narrow tooth zone 11, in the pulse electrical signal of output, two place's bent axle identification points are arranged, and due to hypodontia zone 13, the pulse electrical signal feature of narrow tooth zone 11 correspondences is distinguished mutually, the angle that location recognition need to turn over front crankshaft can be effectively shortened in the existence of two place's identification points, two place's identification points are mutually distinguished controller can be identified respectively two place's identification points, the condition that only relies on crankshaft signal can shorten the consuming time of crank position identifying, improved the recognition speed of crank position.
Embodiment bis-
Based on embodiment mono-, after second standard-sized tooth behind the hypodontia zone of described crankshaft signal wheel, along (opposite direction of crankshaft rotating direction), with edge after first the standard-sized tooth behind the narrow tooth zone of described crankshaft signal wheel, differ 180 degree; The method of described controller identification crank position is:
As shown in Figure 5, the pulse electrical signal that described sensor produces, if there are four adjacent negative edges successively: first negative edge, second negative edge, the 3rd negative edge, the 4th negative edge D, A
21.5A
1and A
21.5A
3, confirm edge after second standard-sized tooth of (opposite direction of crankshaft rotating direction) behind hypodontia zone that current crank position is described crankshaft signal wheel, A
1for the time interval of first negative edge with second negative edge, A
2be the time interval of second negative edge with the 3rd negative edge, A
3it is the time interval of the 3rd negative edge with the 4th negative edge; Preferably, described hypodontia zone lacks two full-height tooths, if A
22A
1and A
22A
3, after described controller is confirmed hypodontia zone that current crank position is described crankshaft signal wheel.
As shown in Figure 6, the pulse electrical signal that described sensor produces, if N+3 adjacent negative edge arranged: the 1st negative edge, the 2nd negative edge, the 3rd negative edge ..., a N+2 negative edge, a N+3 negative edge E, the positive integer that N is greater than 1, if B
11.5B
2and B
n+21.5B
n+1, confirm edge after first the standard-sized tooth behind narrow tooth zone that current crank position is described crankshaft signal wheel, B
1be the time interval of the 1st negative edge with the 2nd negative edge, B
2be the time interval of the 2nd negative edge with the 3rd negative edge, B
n+1be the time interval of N+1 negative edge with N+2 negative edge, B
n+2it is the time interval of N+2 negative edge with N+3 negative edge; Preferably, N is 2.
The crank position pick-up unit of embodiment bis-, after second standard-sized tooth behind the hypodontia zone of crankshaft signal wheel along (opposite direction of crankshaft rotating direction) after first the standard-sized tooth after with narrow tooth zone along differing 180 degree, thereby make the crankshaft signal wheel is had and differs two different identification points of 180 degree, when sensor detects any one identification point, the pulse electrical signal information of this identification point is sent to controller, and the pulse electrical signal that controller is distinguished mutually according to the feature of two place's identification points can calculate the current position of bent axle.The crank position pick-up unit of embodiment bis-, for determining that the required angle turned over of crank position bent axle is 0～0.5 circle, average 0.25 circle, greatly improve the recognition speed of crank position, improved start speed of engine, improved the vehicle launch performance, the rotating speed that drags of supposing actuating motor is 180 rev/mins, close 333ms/r, with the crank position pick-up unit of embodiment bis-, determine that 0.25 astragal that crank position is on average saved has carried out the time shorten of 83ms, can obviously improve user's experience.The crank position pick-up unit of embodiment bis-, being specially adapted between single cylinder or cylinder differ is the engine electric-controlled system of 180 degree integral multiples.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of the utility model protection.
Claims (12)
1. a crank position pick-up unit, comprise bent axle, crankshaft signal wheel, sensor, controller; Described crankshaft signal wheel coaxially fixedly mounts with bent axle; It is characterized in that,
Described crankshaft signal wheel, be ferromagnetic component, and its periphery has a hypodontia zone, two full-height tooths zones, a narrow tooth zone, the hypodontia zone with between narrow tooth zone by two full-height tooths zone institute intervals;
Described full-height tooth zone, be evenly distributed with a plurality of standard tooths;
Described hypodontia zone, lack one or more standard tooths;
Described narrow tooth zone, be evenly distributed with a plurality of narrow gear teeth, and the narrow gear teeth are narrow than standard tooth;
The distance of the gear tip clearance in described narrow tooth zone is less than the distance of the gear tip clearance in described full-height tooth zone;
Described sensor, be arranged on the crankshaft signal wheel peripheral, for the rotation output pulse electrical signal along with the crankshaft signal wheel, arrives described controller;
Described controller, change the identification crank position for the spacing of the negative edge of the pulse electrical signal according to the output of described sensor.
2. crank position pick-up unit according to claim 1, is characterized in that,
Edge after second standard-sized tooth behind the hypodontia zone of described crankshaft signal wheel, differ 180 degree with edge after first the standard-sized tooth behind the narrow tooth zone of described crankshaft signal wheel.
3. crank position pick-up unit according to claim 2, is characterized in that,
Described hypodontia zone, lack one or two standard tooth.
4. crank position pick-up unit according to claim 2, is characterized in that,
Described narrow tooth zone, be evenly distributed with two narrow gear teeth.
5. crank position pick-up unit according to claim 2, is characterized in that,
The twice of the distance apart from the gear tip clearance that is more than or equal to described narrow tooth zone of the gear tip clearance in described full-height tooth zone.
6. crank position pick-up unit according to claim 5, is characterized in that,
The twice of the distance apart from the gear tip clearance that equals described narrow tooth zone of the gear tip clearance in described full-height tooth zone.
7. crankshaft signal wheel, be ferromagnetic component, it is characterized in that, described crankshaft signal wheel periphery has a hypodontia zone, two full-height tooths zones, a narrow tooth zone, the hypodontia zone with between narrow tooth zone by two full-height tooths zone institute intervals;
Described full-height tooth zone, be evenly distributed with a plurality of standard tooths;
Described hypodontia zone, lack one or more standard tooths;
Described narrow tooth zone, be evenly distributed with a plurality of narrow gear teeth, and the narrow gear teeth are narrow than standard tooth;
The distance of the gear tip clearance in described narrow tooth zone is less than the distance of the gear tip clearance in described full-height tooth zone.
8. crankshaft signal wheel according to claim 7, is characterized in that,
Edge after second standard-sized tooth behind the hypodontia zone of described crankshaft signal wheel, differ 180 degree with edge after first the standard-sized tooth behind the narrow tooth zone of described crankshaft signal wheel.
9. crankshaft signal wheel according to claim 8, is characterized in that,
Described hypodontia zone, lack one or two standard tooth.
10. crankshaft signal wheel according to claim 8, is characterized in that,
Described narrow tooth zone, be evenly distributed with two narrow gear teeth.
11. crankshaft signal wheel according to claim 7, is characterized in that,
The twice of the distance apart from the gear tip clearance that is more than or equal to described narrow tooth zone of the gear tip clearance in described full-height tooth zone.
12. crankshaft signal wheel according to claim 7, is characterized in that,
The twice of the distance apart from the gear tip clearance that equals described narrow tooth zone of the gear tip clearance in described full-height tooth zone.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320209477 CN203364847U (en) | 2013-04-23 | 2013-04-23 | Crankshaft position detection device and crankshaft signal wheel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320209477 CN203364847U (en) | 2013-04-23 | 2013-04-23 | Crankshaft position detection device and crankshaft signal wheel |
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| CN203364847U true CN203364847U (en) | 2013-12-25 |
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|---|---|---|---|
| CN 201320209477 Withdrawn - After Issue CN203364847U (en) | 2013-04-23 | 2013-04-23 | Crankshaft position detection device and crankshaft signal wheel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245367A (en) * | 2013-04-23 | 2013-08-14 | 联合汽车电子有限公司 | Crankshaft position detection device and crankshaft signal wheel |
-
2013
- 2013-04-23 CN CN 201320209477 patent/CN203364847U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245367A (en) * | 2013-04-23 | 2013-08-14 | 联合汽车电子有限公司 | Crankshaft position detection device and crankshaft signal wheel |
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| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131225 Effective date of abandoning: 20160601 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |