CN102562338A - Timing judgment method for engine - Google Patents
Timing judgment method for engine Download PDFInfo
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- CN102562338A CN102562338A CN2010106203707A CN201010620370A CN102562338A CN 102562338 A CN102562338 A CN 102562338A CN 2010106203707 A CN2010106203707 A CN 2010106203707A CN 201010620370 A CN201010620370 A CN 201010620370A CN 102562338 A CN102562338 A CN 102562338A
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Abstract
The invention relates to a timing judgment method for an engine. The method comprises a step of detecting whether the position of a piston of the engine is the top dead center or not and a step of judging that the top dead center is the top dead center of a compression stroke or the top dead center of an exhaust stroke, wherein judgment in the latter step can be carried out by a cylinder pressure sensor. According to the timing judgment method provided by the invention, the mounting of a camshaft sensor can be cancelled so as to lower the cost for a system; and on the other hand, the reliability of the system can be improved if the camshaft sensor is not cancelled.
Description
[technical field]
The present invention relates to the electronic control system strategy of motor, belong to field of engine control; Specifically, the present invention relates to a kind of engine timing determination methods of carrying out based on cylinder pressure sensor.
[background technique]
In order to satisfy electronic engine management system decision igniting, the timing of spraying and the needs of pulsewidth, in the Traditional engine management system, adopt crankshaft sensor and camshaft-signal sensor to cooperate the transient position of realizing judging bent axle and camshaft usually.
Protruding axle sensor is one of topmost sensor in the electronic engine management system.Protruding axle sensor also must be accomplished and judge the arbitration functions in correct time except the transient speed of reaction motor.In order to characterize the special position of a certain specific cylinder, general machining feature tooth on the trigger signal dish specially, as process multiple tooth or few tooth.Because a working procedure of bent axle rotated for two weeks, it is compression top center or burning top dead center that the characteristic tooth can not be reflected to the end, can not accomplish the arbitration functions in correct time.
In addition; Camshaft-signal sensor can reflect different level signals respectively for compression top center and burning top dead center in characteristic tooth position; Therefore camshaft-signal sensor and the common use of crankshaft sensor can be accomplished the function of judging correct time, and both constitute the underlying basis that engine ignition sprays jointly.
In novel engine, owing to need control more accurately, need to increase cylinder pressure sensor to realize accurate measurement and control to the in-cylinder combustion process to the in-cylinder combustion process, can increase substantially the performance of motor.But, judge if in this motor, also adopt crankshaft sensor and camshaft-signal sensor to carry out engine timing, then because the increase cylinder pressure sensor makes the increase of engine management system cost as common motor; In addition, only judge the particular location of top dead center, after inefficacy, be not easy to remedy by a kind of sensor.
Therefore, needing badly provides a kind of method that reduces this new work engine system cost, and also expectation provides a kind of method of judging validity that increases.
[summary of the invention]
The purpose of this invention is to provide a kind of engine timing determination methods, motor has the problem of the motor cost of cylinder pressure sensor and camshaft-signal sensor simultaneously in the existing technology so it can overcome.
In addition, further aim of the present invention also is to overcome and not only has cylinder pressure sensor but also have the problem of judging inefficacy correct time of camshaft-signal sensor.
The common following technological scheme of the object of the invention realizes:
According to the invention provides a kind of engine timing determination methods, said method comprises the steps:
Steps A: the detection of engine position of piston, if said position be top dead center then advance to step B, otherwise detect again;
Step B: judge that said top dead center still is the exhaust stroke top dead center for the compression stroke top dead center,
Wherein, the judgement among the said step B can be carried out through cylinder pressure sensor, and
When the detected cylinder of said cylinder pressure sensor is pressed greater than predefined cylinder pressure value, judge that said top dead center is the compression stroke top dead center; And
When the detected cylinder of said cylinder pressure sensor is pressed less than predefined cylinder pressure value, judge that said top dead center is the exhaust stroke top dead center.
Alternatively, in foregoing method, said predefined cylinder pressure value is directly proportional with the throttle opening of motor.That is, throttle opening is big more, and predefined cylinder pressure value is big more.
Alternatively, in foregoing method, said predefined cylinder pressure value is selected between 3 to 10 barometric pressure.
Alternatively, in foregoing method, the detection in the said steps A is that the crankshaft position sensor through motor carries out.
Alternatively, in foregoing method, said crankshaft position sensor is provided with the trigger signal dish, and the state-detection that said piston is positioned at said top dead center is that the characteristic tooth through said trigger signal dish detects.
Alternatively, in foregoing method, the corner deviation between the tooth that said characteristic tooth and said engine piston are detected when arriving lower dead center is greater than 20 degree.
Alternatively, in foregoing method, said motor also is provided with camshaft-signal sensor, wherein,
When said camshaft-signal sensor proper functioning, utilize said camshaft-signal sensor to judge that said top dead center still is the exhaust stroke top dead center for the compression stroke top dead center;
When said camshaft-signal sensor fault, utilize said cylinder pressure sensor to judge that said top dead center still is the exhaust stroke top dead center for the compression stroke top dead center.
Alternatively, in foregoing method, said motor also is provided with camshaft-signal sensor, wherein,
When said cylinder pressure sensor proper functioning, utilize said cylinder pressure sensor to judge that said top dead center still is the exhaust stroke top dead center for the compression stroke top dead center;
When said cylinder pressure sensor fault, utilize said camshaft-signal sensor to judge that said top dead center still is the exhaust stroke top dead center for the compression stroke top dead center.
Can find out by above,, when crankshaft position sensor detects piston and is positioned at top dead center, utilize cylinder pressure sensor to judge that said top dead center still is the exhaust stroke top dead center for the compression stroke top dead center according to determination methods of the present invention.Its advantage is that this makes and the installation that can cancel camshaft-signal sensor reduces system cost.
From another point of view; If do not cancel camshaft-signal sensor; Also can be implemented in camshaft-signal sensor or cylinder pressure sensor the two one of use another sensor to carry out above-mentioned judgement under the situation that lost efficacy, still can carry out stable control to motor, improved the reliability of system.
[description of drawings]
With reference to accompanying drawing, disclosure of the present invention will be more obvious.Should understand, these accompanying drawings only are used for illustrative purposes, and are not intended to limit protection scope of the present invention.Among the figure:
Fig. 1 schematically shows the flow chart according to engine timing determination methods of the present invention; And
Fig. 2 schematically shows the graph of a relation of pressing signal and crankshaft signal according to the cylinder in the engine timing judgement of the present invention.
[embodiment]
Embodiment of the present invention at length is described with reference to the accompanying drawings.Following explanation only is an illustrative, exemplary.In addition, be illustrated in this embodiment according to the present invention, but should understand, some of these embodiments are equal to or similar modification also will fall within protection scope of the present invention with remodeling.
Fig. 1 schematically shows the flow chart according to engine timing determination methods of the present invention.As can be seen from the figure, this determination methods is execution in step A after beginning, and the detection of engine position of piston is if said position is top dead center then advances to step B, otherwise detection of engine piston position again.Because can't confirm that this top dead center is the top dead center of compression stroke or the top dead center of exhaust stroke this moment, so, in step B, judge that through cylinder pressure sensor said top dead center still is the exhaust stroke top dead center for the compression stroke top dead center.Wherein, when the detected cylinder of cylinder pressure sensor is pressed greater than predefined cylinder pressure value, judge that said top dead center is the compression stroke top dead center; And when the detected cylinder of cylinder pressure sensor is pressed less than predefined cylinder pressure value, judge that said top dead center is the exhaust stroke top dead center.In optional mode of execution, said predefined cylinder pressure value and throttle opening positive correlation, throttle opening is big more, and predefined cylinder pressure value is big more, and its preferable range is about 3 to 10 barometric pressure.
Can understand, the detection in the steps A can be that the crankshaft position sensor through motor carries out.Crankshaft position sensor can be the crankshaft position sensor of known different type.For example, crankshaft position sensor is provided with the trigger signal dish, and the state-detection that piston is positioned at top dead center is that the characteristic tooth through the trigger signal dish detects.Under preferred situation, the corner deviation between the tooth that characteristic tooth and engine piston are detected when arriving lower dead center then can guarantee the correctness of judging greater than 20 degree.Undoubtedly, if adopt other sensor or device to detect crank position and combine with of the present invention its characteristic, its technological scheme also will fall in protection scope of the present invention.
Motor can also be provided with camshaft-signal sensor, at this moment, when the camshaft-signal sensor proper functioning, utilizes camshaft-signal sensor to judge that said top dead center still is the exhaust stroke top dead center for the compression stroke top dead center; When the camshaft-signal sensor fault, utilize cylinder pressure sensor to judge that said top dead center still is the exhaust stroke top dead center for the compression stroke top dead center.Perhaps on the contrary, when the cylinder pressure sensor proper functioning, utilize cylinder pressure sensor to judge that said top dead center still is the exhaust stroke top dead center for the compression stroke top dead center; When the cylinder pressure sensor fault, utilize the camshaft sensor to judge that said top dead center still is the exhaust stroke top dead center for the compression stroke top dead center.
Fig. 2 schematically shows the graph of a relation of pressing signal and crankshaft signal according to the cylinder in the engine timing judgement of the present invention.Particularly, the crankshaft signal dish that lacks 2 teeth with 60 teeth is an example, and Fig. 2 has represented cylinder pressure of engines signal and the crankshaft signal corresponding relation of (motor is lighted a fire as yet) in start-up course.In an engine operational cycle, can detect 2 hypodontia signals (1,2 positions among the figure); In engine control software, when detecting the hypodontia signal, the signal of inspection cylinder pressure sensor; If cylinder presses signal greater than the pressure limit of setting; Judge that then this position is this cylinder compression stroke,, then judge the exhaust stroke of this position for this cylinder if cylinder presses signal less than the pressure limit of setting.Therefore just can judge the job order of cylinder rapidly, carry out corresponding oil spout IGNITION CONTROL.
This mode of execution is provided with to different engine crankshaft signal panel, and the difference cylinder mounting point of cylinder pressure sensor can be suitable for.But the corner deviation that preferably guarantees characteristic tooth and piston lower dead center is more than 20 degree, to guarantee the reliability of determination methods in this in correct time.Be installed in the situation on the difference cylinder to cylinder pressure sensor, only need change judge correct time in corresponding cylinder numbers get final product.
For the situation that camshaft-signal sensor and cylinder pressure sensor have been installed on the motor simultaneously, when finding the camshaft-signal sensor fault, can press signal to proceed correct time according to cylinder and judge.When detecting the hypodontia signal, the inspection cylinder is pressed signal, if cylinder presses signal greater than the pressure limit of setting, judges that then this position is a compression stroke, if cylinder presses signal less than the pressure limit of setting, then judges the exhaust stroke of this position for this cylinder.Because the cylinder in the engine operation process presses numerical value and the cylinder in the start-up course to press numerical value to have than big difference, the pressure limit that adopts in the pressure limit of setting and the start-up course is different, needs on stand, test in advance definite.
Can find out from above; The present invention is directed to the method judgement engine timing that the motor that cylinder pressure sensor is installed has adopted cylinder pressure sensor to combine with crankshaft sensor; Can in start-up course, judge correct time rapidly; Thereby light a fire and oil spout control, can cancel the traditional cam axle sensor, reduce system cost.Also can when camshaft-signal sensor breaks down, adopt cylinder pressure sensor to continue the function that realizes that judge correct time, guarantee the proper functioning of motor, improve the reliability of system to the system that still has camshaft-signal sensor.
As stated, according to accompanying drawing preferred implementation of the present invention has been carried out detailed description.The person of ordinary skill in the field can understand; Though do not have fully each technological scheme to be carried out detailed description in this reason as space is limited; But disclosed the basic principle of each technological scheme of the present invention, thereby these technological schemes are in fact by the disclosed embodiment of this specification institute letter lid.Undoubtedly, these technological schemes and equivalent thereof also will fall in the protection domain that is limited claims of the present invention.
Claims (8)
1. engine timing determination methods, said method comprises the steps:
Steps A: the detection of engine position of piston, if said position be top dead center then advance to step B, otherwise detect again;
Step B: judge that said top dead center still is the exhaust stroke top dead center for the compression stroke top dead center,
It is characterized in that,
Judgement among the said step B can be carried out through cylinder pressure sensor, and
When the detected cylinder of said cylinder pressure sensor is pressed greater than predefined cylinder pressure value, judge that said top dead center is the compression stroke top dead center; And
When the detected cylinder of said cylinder pressure sensor is pressed less than predefined cylinder pressure value, judge that said top dead center is the exhaust stroke top dead center.
2. the method for claim 1 is characterized in that, said predefined cylinder pressure value is directly proportional with the throttle opening of motor.
3. the method for claim 1 is characterized in that, said predefined cylinder pressure value is selected between 3 to 10 barometric pressure.
4. the method for claim 1 is characterized in that,
Detection in the said steps A is that the crankshaft position sensor through motor carries out.
5. method as claimed in claim 4 is characterized in that said crankshaft position sensor is provided with the trigger signal dish, and the state-detection that said piston is positioned at said top dead center is that the characteristic tooth through said trigger signal dish detects.
6. method as claimed in claim 5 is characterized in that, the corner deviation between the tooth that said characteristic tooth and said engine piston are detected when arriving lower dead center is greater than 20 degree.
7. like each described method in the claim 1 to 6, it is characterized in that said motor also is provided with camshaft-signal sensor, wherein,
When said camshaft-signal sensor proper functioning, utilize said camshaft-signal sensor to judge that said top dead center still is the exhaust stroke top dead center for the compression stroke top dead center;
When said camshaft-signal sensor fault, utilize said cylinder pressure sensor to judge that said top dead center still is the exhaust stroke top dead center for the compression stroke top dead center.
8. like each described method in the claim 1 to 6, it is characterized in that said motor also is provided with camshaft-signal sensor, wherein,
When said cylinder pressure sensor proper functioning, utilize said cylinder pressure sensor to judge that said top dead center still is the exhaust stroke top dead center for the compression stroke top dead center;
When said cylinder pressure sensor fault, utilize said camshaft-signal sensor to judge that said top dead center still is the exhaust stroke top dead center for the compression stroke top dead center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010620370.7A CN102562338B (en) | 2010-12-29 | 2010-12-29 | Timing judgment method for engine |
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| CN201010620370.7A CN102562338B (en) | 2010-12-29 | 2010-12-29 | Timing judgment method for engine |
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| CN102562338A true CN102562338A (en) | 2012-07-11 |
| CN102562338B CN102562338B (en) | 2015-04-15 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940554A (en) * | 2013-01-22 | 2014-07-23 | 上海汽车集团股份有限公司 | Engine fault diagnosis method and equipment |
| WO2019106256A1 (en) | 2017-12-01 | 2019-06-06 | Continental Automotive France | Method for synchronising an internal combustion engine |
| CN112213110A (en) * | 2020-09-29 | 2021-01-12 | 上汽通用五菱汽车股份有限公司 | Method and system for measuring phase of driving cam of high-pressure oil pump of gasoline engine and storage medium |
| CN112213111A (en) * | 2020-09-29 | 2021-01-12 | 上汽通用五菱汽车股份有限公司 | Engine timing measurement method and system and storage medium |
| CN116773204A (en) * | 2023-06-21 | 2023-09-19 | 东风本田发动机有限公司 | Engine piston measuring method, device, computer equipment and storage medium |
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| CN1470756A (en) * | 2002-06-13 | 2004-01-28 | 爱三工业株式会社 | Stroke determining method of IC engine and stroke determining apparatus using said method |
| CN1869414A (en) * | 2005-05-12 | 2006-11-29 | 富士通天株式会社 | Variable valve control apparatus |
| US20060293829A1 (en) * | 2002-11-27 | 2006-12-28 | Cornwell Richard Charles E | Engine management |
| CN201277099Y (en) * | 2008-09-24 | 2009-07-22 | 张和君 | Electric-controlled work system used for petrol engine motorboat and its motorboat |
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Patent Citations (4)
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| CN1470756A (en) * | 2002-06-13 | 2004-01-28 | 爱三工业株式会社 | Stroke determining method of IC engine and stroke determining apparatus using said method |
| US20060293829A1 (en) * | 2002-11-27 | 2006-12-28 | Cornwell Richard Charles E | Engine management |
| CN1869414A (en) * | 2005-05-12 | 2006-11-29 | 富士通天株式会社 | Variable valve control apparatus |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103940554A (en) * | 2013-01-22 | 2014-07-23 | 上海汽车集团股份有限公司 | Engine fault diagnosis method and equipment |
| CN103940554B (en) * | 2013-01-22 | 2016-06-22 | 上海汽车集团股份有限公司 | Fault Diagnosis of Engine and equipment |
| WO2019106256A1 (en) | 2017-12-01 | 2019-06-06 | Continental Automotive France | Method for synchronising an internal combustion engine |
| CN112213110A (en) * | 2020-09-29 | 2021-01-12 | 上汽通用五菱汽车股份有限公司 | Method and system for measuring phase of driving cam of high-pressure oil pump of gasoline engine and storage medium |
| CN112213111A (en) * | 2020-09-29 | 2021-01-12 | 上汽通用五菱汽车股份有限公司 | Engine timing measurement method and system and storage medium |
| CN116773204A (en) * | 2023-06-21 | 2023-09-19 | 东风本田发动机有限公司 | Engine piston measuring method, device, computer equipment and storage medium |
| CN116773204B (en) * | 2023-06-21 | 2024-09-24 | 东风本田发动机有限公司 | Engine piston measuring method, device, computer equipment and storage medium |
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| CN102562338B (en) | 2015-04-15 |
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Granted publication date: 20150415 Termination date: 20211229 |