CN101328845A - Pressure cylinder decision system - Google Patents
Pressure cylinder decision system Download PDFInfo
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- CN101328845A CN101328845A CNA200810117137XA CN200810117137A CN101328845A CN 101328845 A CN101328845 A CN 101328845A CN A200810117137X A CNA200810117137X A CN A200810117137XA CN 200810117137 A CN200810117137 A CN 200810117137A CN 101328845 A CN101328845 A CN 101328845A
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Abstract
The invention relates to a pressure cylinder detection system of a gasoline engine, comprising a temperature sensor of an intake pressure arranged on an intake manifold of a first cylinder or a fourth cylinder of the engine. When the first cylinder or the fourth cylinder inflows air, the sensor generates a voltage collapse signal, and an electronic control unit can judge a state of the engine according to a crankshaft and the voltage collapse signal. The invention can judge correctly a working position of the engine in the absence of a cam shaft sensor. In addition, because of no system of the cam shaft sensor, the invention can omit diagnosis and error processing measures of the sensor, thereby improving workability of the whole system, and not only saving cost with simple mechanical structure and reducing difficulty of later maintenance.
Description
Technical field
The present invention relates to a kind of petrol engine, specifically a kind of pressure cylinder decision system of petrol engine.
Background technique
A circulation of existing EFI formula 4 cylinders petrol engine in upright arrangement has 4 strokes, be respectively: air inlet, compression, acting and exhaust stroke, piston all can reach the position of top dead center when wherein compression stroke and exhaust stroke finished, so in 4 cylinder machines, always have two cylinders to reach top dead center simultaneously, and each cycle crankcase will change for two weeks and camshaft only circles, so need concern the working position of judging motor by the position of bent axle and camshaft, oil nozzle sprays into gasoline in the corresponding intake manifold before exhaust stroke finishes, exhaust stroke finishes, aspirating stroke begins, intake valve is opened, and is inhaled in the cylinder simultaneously after gasoline that has just sprayed into and the air mixing and burns.
At present the most frequently used is exactly that camshaft is declared cylinder technology, and this Technology Need is gathered the position information of camshaft and bent axle simultaneously, judges the state of motor by the position relation of the two.Bent axle takes two turns in 1 circulation of motor, camshaft turns around, and can not distinguish the position of 1 cylinder and 4 cylinders, 2 cylinders and 3 cylinders separately by the position of bent axle, and the concrete working state of motor is determined in the position that must unite bent axle and camshaft.So except being installed on the intake manifold the atmospheric pressure temperature transducer (hereinafter to be referred as TMAP), also need to increase and adorn a camshaft-signal sensor, so, not only increased cost, and increased the difficulty of later maintenance.Publication number is that the application for a patent for invention of CN1198801A discloses a kind of method that is used for determining 4 stroke IC engine phase places, particular content is: by provide by crankshaft angle sensor, individual first signal is associated with secondary signal (output signal of intake manifold pressure sensor), according to first signal secondary signal is handled thus and is carried out phase identification.Wherein do not have camshaft-signal sensor, but it can only be used to determine to have 4 stroke IC engine phase places of odd number cylinder number.
Summary of the invention
(1) technical problem that will solve
The objective of the invention is at above-mentioned the deficiencies in the prior art, provide a kind of at the pressure cylinder decision system that does not have also can accurately judge under the situation of camshaft-signal sensor the working position of motor with even cylinder number.
(2) technological scheme
For achieving the above object, the present invention adopts following technological scheme: on hardware, the present invention requires the TMAP sensor must be installed on the intake manifold rather than on the intake manifold.Declare at traditional camshaft that the TMAP sensor always is mounted on the intake manifold in the system of cylinder, but in the present invention, so the MAP waveform when catching the single cylinder air inlet owing to needs will be installed in the TMAP sensor on the intake manifold, generally is mounted on the intake manifold of 1 cylinder or 4 cylinders.On software, program need noisy situation judge out single cylinder air inlet constantly, this just needs to increase the Signal Pretreatment program.
Pressure cylinder decision system of the present invention is compared with traditional camshaft cylinder decision system and has been reduced by a camshaft-signal sensor, the just software cost that increase.
(3) beneficial effect
The advantage and the good effect of pressure cylinder decision system of the present invention are: because the suction pressure temperature transducer is installed on the intake manifold of 1 cylinder of motor or 4 cylinders, when 1 cylinder or 4 cylinder air inlets, can produce the signal of a pressure drop on the sensor, the state that electronic control unit just can be judged motor according to the mechanical relation and the voltage dip signal of bent axle and camshaft.So the present invention can be in the working position that does not have can judge accurately under the situation of camshaft-signal sensor motor.In addition, owing to there is not the camshaft-signal sensor system, not only can save sensor and and electronic component, camshaft wheel and corresponding cable joining.And on engine controller, can save three plugs, can also save processing circuit and computer plug of sensor.Can reduce the area of printed circuit board (PCB) equally.In the diagnosis and the wrong treatment measures that do not have to save under the situation of camshaft-signal sensor to this sensor, improve the workability of whole system thus.So the present invention has not only saved cost, and mechanical structure is simple, has reduced the difficulty of later maintenance.
Description of drawings
Fig. 1 is a kind of MAP signal graph of the present invention;
Fig. 2 is a kind of pressure cylinder decision flow chart of the present invention;
Embodiment
Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
A kind of MAP signal of the present invention supposes that TMAP (suction pressure temperature) sensor is installed on the 1 cylinder intake manifold as shown in Figure 1.Can find out significantly that waveform has obvious characteristics when 1 cylinder air inlet, promptly the instantaneous pressure of opening at intake valve can reduce suddenly.The present invention can adopt the mode of Signal Pretreatment to catch crucial map signal, and the pretreated signal bigger point that fluctuates in one-period (i.e. 4 strokes) is moment of a cylinder air inlet.
Fig. 2 is a kind of pressure cylinder decision flow chart of the present invention, and this system postulation TMAP sensor is installed on the 1 cylinder intake manifold.Electronic control unit mainly is to catch the pressure drop signal in this process, state according to bent axle and voltage dip signal judgement motor, and to set pull-in time according to the corner of bent axle, this is because the corner of 1 cylinder and 4 cylinders pairing bent axle when air inlet is identical, suppose all corresponding the 10th tooth of bent axle, we sample to the map signal when the 10th tooth so, determine the relation of map signal and engine location, adopt the map signal to come the travel position of auxiliary judgment engine operation, if in the time of appointment, capture the pressure drop signal then think 1 cylinder, otherwise think that 4 cylinders are in air inlet in air inlet.
Claims (3)
1. a pressure cylinder decision system is characterized in that, comprising:
The suction pressure temperature transducer is installed on the intake manifold of 1 cylinder of motor or 4 cylinders, when 1 cylinder or 4 cylinder air inlets, can produce the signal of a pressure drop on the described suction pressure temperature transducer;
Electronic control unit is used for the state according to bent axle and described pressure drop signal judgement motor.
2. pressure cylinder decision system as claimed in claim 1 is characterized in that described electronic control unit is determined the relation of map signal and engine location, adopts the map signal to come the travel position of auxiliary judgment engine operation.
3. pressure cylinder decision system as claimed in claim 2 is characterized in that, adopts the mode of Signal Pretreatment to catch crucial map signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810117137XA CN101328845A (en) | 2008-07-24 | 2008-07-24 | Pressure cylinder decision system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810117137XA CN101328845A (en) | 2008-07-24 | 2008-07-24 | Pressure cylinder decision system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101328845A true CN101328845A (en) | 2008-12-24 |
Family
ID=40204817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200810117137XA Pending CN101328845A (en) | 2008-07-24 | 2008-07-24 | Pressure cylinder decision system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101328845A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603739A (en) * | 2013-11-15 | 2014-02-26 | 奇瑞汽车股份有限公司 | Two-cylinder engine cylinder determining system and automobile |
| CN104279066B (en) * | 2013-07-11 | 2017-02-08 | 北京清研宏达信息科技有限公司 | Fire-catching cylinder identification method of four-cylinder engine |
| CN112814798A (en) * | 2021-01-05 | 2021-05-18 | 潍柴动力股份有限公司 | Engine and control system and control method thereof |
-
2008
- 2008-07-24 CN CNA200810117137XA patent/CN101328845A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279066B (en) * | 2013-07-11 | 2017-02-08 | 北京清研宏达信息科技有限公司 | Fire-catching cylinder identification method of four-cylinder engine |
| CN103603739A (en) * | 2013-11-15 | 2014-02-26 | 奇瑞汽车股份有限公司 | Two-cylinder engine cylinder determining system and automobile |
| CN103603739B (en) * | 2013-11-15 | 2016-01-27 | 奇瑞汽车股份有限公司 | A kind of two cylinder cylinder decision system and automobile |
| CN112814798A (en) * | 2021-01-05 | 2021-05-18 | 潍柴动力股份有限公司 | Engine and control system and control method thereof |
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Open date: 20081224 |