CN105673215A - Stopping method for engine reverse positioning pressure reduction - Google Patents
Stopping method for engine reverse positioning pressure reduction Download PDFInfo
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- CN105673215A CN105673215A CN201610117723.9A CN201610117723A CN105673215A CN 105673215 A CN105673215 A CN 105673215A CN 201610117723 A CN201610117723 A CN 201610117723A CN 105673215 A CN105673215 A CN 105673215A
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- Prior art keywords
- engine
- decompression
- inverted orientation
- ting
- motor
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
- F02D17/04—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling rendering engines inoperative or idling, e.g. caused by abnormal conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/08—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for decompression, e.g. during starting; for changing compression ratio
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention discloses a stopping method for engine reverse positioning pressure reduction. The stopping method comprises the steps that firstly, before an engine is about to stall, a motor is driven to rotate forwards, and the engine is stopped after rotating forwards to a reset point of a pressure reduction mechanism; the motor is driven to reversely rotate, the engine is reversely positioned, the pressure reduction mechanism of the engine enters the position between the starting point and the finishing point of the pressure reduction state, and driving of the motor is stopped; and the method is adopted to enable the engine to be in the pressure reduction state before the engine is started, loads of the engine during starting are reduced, and therefore the engine can rapidly response to starting operation so as to enable a vehicle to be started, and the starting performance is improved.
Description
Technical field
The invention belongs to the technical field of engine starting, specifically relate to a kind of closing method for the decompression of engine inverted orientation.
Background technology
In the prior art, the mechanism of decompressor of a kind of reverse back rotation mechanism is employed during motorcycle initiating, the effect of this mechanism of decompressor is less and design in order to start crankshaft rotation resistance next time, after turning off ignition switch, bent axle is also by inertia running, due to the effect of the resistance of compression stroke, piston stops and the reversion of lower enforcement bent axle before arriving compression top center, as long as bent axle is started working and jack-up valve once generation this mechanism of decompressor of reversion, valve is opened in cylinder without pressure, when next time starts machine operation, engine reduction compression resistance makes startup easier, as long as bent axle rotates forward through compression stroke and acting stroke, the unlatching of valve is just released after entering out stroke.
In the above prior art, below appearance during three kinds of situations, the mechanism of decompressor being caused to lose efficacy, engine starting resistance increases, thus the phenomenon of difficulty in starting occurs:
1) not entering compression stroke during engine shutdown causes without reversal development;
2) the excessively little initiating terminal causing reverse angle not enter the mechanism of decompressor of engine compresses resistance;
3) the excessive end end causing reverse angle to exceed the mechanism of decompressor of engine compresses resistance.
Summary of the invention
In view of this; it is an object of the invention to provide a kind of closing method for the decompression of engine inverted orientation; this closing method being used for the decompression of engine inverted orientation makes the mechanism of decompressor be in mechanism of decompressor reduction point by being rotated forward by engine; and then reverse engine and make the initiating terminal that the mechanism of decompressor is in mechanism of decompressor work and the position terminated between end, thus when making start machine operation next time, engine reduces compression resistance and makes startup easier.
In order to achieve the above object, the present invention is used for the closing method of engine inverted orientation decompression, and its step is as follows:
1) before engine is by stall, drive-motor rotates forward, and stops after making engine just forward the reduction point of the mechanism of decompressor to;
2) drive-motor reversion, carries out inverted orientation to engine, makes the mechanism of decompressor of engine enter the position between decompression state starting point and end point, stops motor and drives.
Further, in step 1) in, when the following situation of appearance:
1) drive current rise to the current value set in advance during engine stall;
2) engine reverse signal is detected during forward drive engine;
3) time with maximum driving force forward drive engine, detecting that motor speed is higher than, after the 1st datum velocity set in advance, then there is engine speed lower than the 2nd datum velocity set in advance, the 2nd datum velocity is less than the 50% of the 1st datum velocity;
Wherein either case occurs, and judges that engine enters compression stroke, assert that reducing valve enters reduction point.
Further, when controlling to start motor rotating forward, when engine speed being detected lower than the 1st set(ting)value by feeler mechanism, drive-motor, makes engine constant airspeed in the 2nd set(ting)value.
Further, the 1st set(ting)value is 300rpm～500rpm, and the 2nd set(ting)value is 200rpm～600rpm.
Further, in step 2) in, by control engine reversion, according to feeler mechanism, judging reverse angle, control motor makes engine enter the position between decompression state starting point and end point.
Further, wherein reverse angle is 60 degree of maximum decompression angles to reducing valve.
Further, detected the size of the end point distance of reverse position and decompression state by feeler mechanism, control the speed reversal of engine.
Further, after being less than the 3rd set(ting)value by the end point distance of feeler mechanism's detection reverse position and decompression state, control motor three phase short circuit braking.
Further, after being less than the 4th set(ting)value by the end point distance of feeler mechanism's detection reverse position and decompression state, control motor forward drive braking.
Further, the 3rd set(ting)value is 40～80 degree, and the 4th set(ting)value is 20～40 degree.
Further, when disconnecting powered battery and make engine stop, controlling organization connects battery voluntarily, until completing to stop self-powered after inverted orientation reduces pressure.
The useful effect of the present invention is:
The present invention is used for the closing method of engine inverted orientation decompression by reversing in reduced pressure zone by crank; and then carry out just to startup; engine can be controlled when rotating forward turns over compression stroke; reducing valve work makes engine be in decompression state; substantially reduce engine starting resistance; the method extends the reducing valve working hour, it is possible to improve motor speed fast, it is to increase the startability of engine.
Accompanying drawing explanation
In order to make the object of the present invention, technical scheme and useful effect clearly, the present invention provides following accompanying drawing to be described:
Fig. 1 is the action schematic diagram of the closing method that the present invention is reduced pressure for engine inverted orientation;
Fig. 2 crank angle location of closing method that to be the present invention reduce pressure for engine inverted orientation and the schematic diagram of moment;
Fig. 3 is that present method is by the oscillogram of hypodontia signal and hall signal reversion location engine bent axle position;
Fig. 4 is that present method controls waveform design sketch by speed stabilizing;
The control schema of the closing method of inverted orientation decompression is carried out when Fig. 5 is the engine shutdown of the present invention;
Fig. 6 is the control schema that the response start-up operation of the present invention carries out the closing method of inverted orientation decompression.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
As shown in Figure 1, Figure 2, shown in Fig. 5, Fig. 6, carrying out the closing method of inverted orientation decompression during a kind of engine shutdown of the present invention, its step is:
1) before engine is by stall, drive-motor rotates forward, and stops after making engine just forward the reduction point of the mechanism of decompressor to;
2) drive-motor reversion, carries out inverted orientation to engine, makes the mechanism of decompressor of engine enter the position between decompression state starting point and end point, stops motor and drives.
The present embodiment response controls when engine shutdown, at each flame-out of engine in the process stopped completely, carry out inverted orientation method, all the time decompression state it is in when engine is stopped, thus respond rapidly start-up operation next time, improve startability, this closing method is by reversing in reduced pressure zone by crank, and then carry out just to startup, engine can be controlled when rotating forward turns over compression stroke, reducing valve work makes engine be in decompression state, substantially reduce engine starting resistance, the method extends the reducing valve working hour, motor speed can be improved fast, improve the startability of engine.
Further, it is preferable that the present invention for engine inverted orientation decompression closing method in, in step 1) in, when appearance following situation:
1) drive current rise to the current value set in advance during engine stall;
2) engine reverse signal is detected during forward drive engine;
3) in engine rotating forward process, detecting that motor speed is higher than, after the 1st datum velocity set in advance, then there is engine speed lower than the 2nd datum velocity set in advance, the 2nd datum velocity is less than the 50% of the 1st datum velocity;
Wherein either case occurs, judge that engine enters compression stroke, assert that reducing valve enters reduction point, in the present embodiment when occurring any one of above-mentioned three kinds of situations, engine can be represented and now entered compression stroke, the mechanism of decompressor is in reset mode, it is possible to carry out the operation of reversion location.
Further, it is preferable that in step 1) in, control start motor rotate forward time, when engine speed being detected lower than the 1st set(ting)value by feeler mechanism, drive-motor, makes engine constant airspeed in the 2nd set(ting)value.
Further, it is preferable that the 1st set(ting)value be 300rpm～500rpm, the 2nd set(ting)value is 200rpm～600rpm
According to motor speed lower than the 1st set(ting)value; can determine now engine is in the process shut down but also do not stop completely; by control motor speed in the 2nd set(ting)value, avoid engine due to inertia effect and can not stop at the problem of mechanism of decompressor reduction point position.
In step 1) in, enter compression stroke [120 degree, 180 degree] with 500rpm interval, as shown in the table:
Further, in step 1) in, it is preferable that before shutdown; reducing engine rotating forward rotating speed is 500～650RPM, selects the mode rotating speed of control: 500RPM, allowance rotating speed 150rpm; preventing motor from turning over compression stroke by above-mentioned control, experimental result is as shown in the table:
| Positive rotary speed | Rotate forward time speed | Turn over number of times | Turn over proportion |
| 500 | 50 | 0 | 0% |
| 600 | 50 | 0 | 0% |
| 650 | 20 | 7 | 35% |
| 700 | 10 | 10 | 100% |
Further, in step 1) in, in the mode of rotating speed lower than three phase short circuit during 1000rpm, stop fast, shorten shutdown period.
Further, in step 2) in, by control engine reversion, according to feeler mechanism, judge reverse angle, control motor makes engine enter the position between decompression state starting point and end point, preferred wherein reverse angle is 60 degree of maximum decompression angles to reducing valve, the present embodiment is connected by physical construction according to motor and bent axle and engine cam, by controlling the reversion of motor, make the mechanism of decompressor on camshaft in running order, thus make engine be in decompression state, reduce load when engine starts.
As shown in Figure 3, Figure 4, further, in step 2) in, driving 250 degree by speed stabilizing control reversion, wherein reversion drives first 150 degree, and employing motor speed is 400RPM, wherein reversion drives latter 100 degree, and employing motor speed is 100RPM, as shown in the table:
Further, it is preferable that the size of the end point distance being detected reverse position and decompression state by feeler mechanism, control the speed reversal of engine; Preferred 1) after being less than the 3rd set(ting)value by the end point distance of feeler mechanism's detection reverse position and decompression state, control motor three phase short circuit braking; 2) after being less than the 4th set(ting)value by the end point distance of feeler mechanism's detection reverse position and decompression state, control motor forward drive braking;Preferred 3rd set(ting)value is 40～80 degree, 4th set(ting)value is 20～40 degree, the present embodiment is when the end point distance of reverse position and decompression state is less than the 1st set(ting)value, adopt damping force little but the motor three phase short circuit mode of braking that engine stops can be made, on the other hand, when the end point distance of reverse position and decompression state is less than less than the 3rd set(ting)value the 4th set(ting)value, the motor forward drive braking adopting damping force big, until the end point distance of engine reverse position and decompression state is between the 3rd set(ting)value to the 4th set(ting)value.
Further, in step 2) in, controlled the shutdown distance reversed and drive 50 degree by three phase short circuit and applying forward drive two kinds of modes, make crank position be fixed on charging stroke, as shown in the table:
Further, in step 2) in, reversion drives first 30 degree to cancel forward drive control, adopts forward drive control higher than 200rpm, otherwise adopts three phase short circuit brake.
Further, after reversion drives, 20 degree adopt forward drive control, adopt forward drive control higher than 100rpm, otherwise adopt three phase short circuit brake.
Further, preferably when disconnecting powered battery and make engine stop, controlling organization connects battery voluntarily, until completing to stop self-powered after inverted orientation reduces pressure, the present embodiment is when disconnecting powered battery and make engine stop, and controlling organization connects battery voluntarily, until completing to stop self-powered after inverted orientation reduces pressure, avoiding when disconnecting powered battery and make engine stop, controlling organization is due to power-off thus cannot carry out the problem of inverted orientation control.
What finally illustrate is, above preferred embodiment is only in order to illustrate the technical scheme of the present invention and unrestricted, although by above preferred embodiment to invention has been detailed description, but those skilled in the art are to be understood that, in the form and details it can be made various change, and do not deviate claims of the present invention limited range.
Claims (10)
1. the closing method for the decompression of engine inverted orientation, it is characterised in that: its step is as follows:
1) before engine is by stall, drive-motor rotates forward, and stops after making engine just forward the reduction point of the mechanism of decompressor to;
2) drive-motor reversion, carries out inverted orientation to engine, makes the mechanism of decompressor of engine enter the position between decompression state starting point and end point, stops motor and drives.
2. as claimed in claim 1 for the closing method of engine inverted orientation decompression, it is characterised in that: in step 1), when the following situation of appearance:
1) drive current rise to the current value set in advance during engine stall;
2) engine reverse signal is detected during forward drive engine;
3) time with maximum driving force forward drive engine, detecting that motor speed is higher than, after the 1st datum velocity set in advance, then there is engine speed lower than the 2nd datum velocity set in advance, the 2nd datum velocity is less than the 50% of the 1st datum velocity;
Wherein either case occurs, and assert that reducing valve enters reduction point.
3. as described in claim 1 ~ 2 for engine inverted orientation decompression closing method; it is characterized in that: when controlling to start motor rotating forward; when engine speed being detected lower than the 1st set(ting)value by feeler mechanism, drive-motor, makes engine constant airspeed in the 2nd set(ting)value.
4. as claimed in claim 3 for the closing method of engine inverted orientation decompression, it is characterised in that: the 1st set(ting)value is 300rpm ~ 500rpm, and the 2nd set(ting)value is 200rpm ~ 600rpm.
5. as claimed in claim 1 for the closing method of engine inverted orientation decompression; it is characterized in that: in step 2) in, by control engine reversion, according to feeler mechanism; judging reverse angle, control motor makes engine enter the position between decompression state starting point and end point.
6. as claimed in claim 5 for the closing method of engine inverted orientation decompression, it is characterised in that: wherein reverse angle is 60 degree of maximum decompression angles to reducing valve.
7. as claimed in claim 5 for the closing method of engine inverted orientation decompression, it is characterised in that: the size being detected the end point distance of reverse position and decompression state by feeler mechanism, controls the speed reversal of engine.
8. as claimed in claim 7 for the closing method of engine inverted orientation decompression, it is characterised in that:
1) after being less than the 3rd set(ting)value by the end point distance of feeler mechanism's detection reverse position and decompression state, control motor three phase short circuit braking;
2) after being less than the 4th set(ting)value by the end point distance of feeler mechanism's detection reverse position and decompression state, control motor forward drive braking.
9. as claimed in claim 8 for the closing method of engine inverted orientation decompression, it is characterised in that: the 3rd set(ting)value is 40～80 degree, and the 4th set(ting)value is 20～40 degree.
10. as claimed in claim 1 for the closing method of engine inverted orientation decompression, it is characterised in that: when disconnecting powered battery and make engine stop, controlling organization connects battery voluntarily, until completing to stop self-powered after inverted orientation reduces pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610117723.9A CN105673215B (en) | 2016-03-02 | 2016-03-02 | The closing method of decompression is reverse-located for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610117723.9A CN105673215B (en) | 2016-03-02 | 2016-03-02 | The closing method of decompression is reverse-located for engine |
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| Publication Number | Publication Date |
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| CN105673215A true CN105673215A (en) | 2016-06-15 |
| CN105673215B CN105673215B (en) | 2018-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610117723.9A Active CN105673215B (en) | 2016-03-02 | 2016-03-02 | The closing method of decompression is reverse-located for engine |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4590905A (en) * | 1984-05-04 | 1986-05-27 | Honda Giken Kogyo Kabushiki Kaisha | Process for decompression control in internal combustion engine and apparatus therefor |
| CN1460147A (en) * | 2001-03-30 | 2003-12-03 | 本田技研工业株式会社 | Decompressor for 4-stroke cycle IC engine |
| CN1991135A (en) * | 2005-12-28 | 2007-07-04 | 株式会社日立制作所 | Variable valve actuation system of internal combustion engine |
| JP2008082297A (en) * | 2006-09-28 | 2008-04-10 | Honda Motor Co Ltd | Decompression device of internal combustion engine |
| US20100077980A1 (en) * | 2008-09-29 | 2010-04-01 | S & S Cycle, Inc. | Compression release mechanism |
-
2016
- 2016-03-02 CN CN201610117723.9A patent/CN105673215B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4590905A (en) * | 1984-05-04 | 1986-05-27 | Honda Giken Kogyo Kabushiki Kaisha | Process for decompression control in internal combustion engine and apparatus therefor |
| CN1460147A (en) * | 2001-03-30 | 2003-12-03 | 本田技研工业株式会社 | Decompressor for 4-stroke cycle IC engine |
| CN1991135A (en) * | 2005-12-28 | 2007-07-04 | 株式会社日立制作所 | Variable valve actuation system of internal combustion engine |
| JP2008082297A (en) * | 2006-09-28 | 2008-04-10 | Honda Motor Co Ltd | Decompression device of internal combustion engine |
| US20100077980A1 (en) * | 2008-09-29 | 2010-04-01 | S & S Cycle, Inc. | Compression release mechanism |
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| CN105673215B (en) | 2018-04-06 |
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Effective date of registration: 20211018 Address after: 401121 next to the west section of Jinkai Avenue, gaoxinyuan, new North District, Yubei District, Chongqing (No. 1-1-5, H Standard Division) Patentee after: CHONGQING LIHUA AUTOMATIC TECHNOLOGY Co.,Ltd. Address before: 402566 No. 8, Xinhua Road, Pulu sub district office, Tongliang Industrial Park, Tongliang County, Chongqing Patentee before: CHONGQING GENFU SOFTWARE DEVELOPMENT Co.,Ltd. |
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