CN102482962B - Method for controlling stoppage of reduction of blow-by gas in starting - Google Patents
Method for controlling stoppage of reduction of blow-by gas in starting Download PDFInfo
- Publication number
- CN102482962B CN102482962B CN201080027453.3A CN201080027453A CN102482962B CN 102482962 B CN102482962 B CN 102482962B CN 201080027453 A CN201080027453 A CN 201080027453A CN 102482962 B CN102482962 B CN 102482962B
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- CN
- China
- Prior art keywords
- gas leakage
- pipeline
- starting
- open
- aforementioned
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
- F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
- F01M13/022—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure using engine inlet suction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M2013/0038—Layout of crankcase breathing systems
- F01M2013/005—Layout of crankcase breathing systems having one or more deoilers
- F01M2013/0061—Layout of crankcase breathing systems having one or more deoilers having a plurality of deoilers
- F01M2013/0066—Layout of crankcase breathing systems having one or more deoilers having a plurality of deoilers in parallel
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
Abstract
Disclosed is a control method for blow-by gas recovery stoppage during operation in an engine (1) provided with a blow-by gas inlet (5), which aspirates blow-by gas containing DME vapor into an air inlet (3), and a release line (6), which releases the aforementioned blow-by gas into the atmosphere. Said method is provided with a discharge step (steps S2 and S3) closing the aforementioned blow-by gas inlet (5) and opening the aforementioned release line (6) before the engine (1) starts up, and a recovery step (steps S6 and S7) opening the aforementioned blow-by gas inlet (5) and closing the aforementioned release line (6) after the aforementioned engine (1) starts up (steps S4 and S5). While the aforementioned engine (1) is stopped, excluding the aforementioned discharge step (steps S2 and S3), the aforementioned blow-by gas inlet (5) and the aforementioned release line (6) are closed.
Description
Technical field
The present invention relates to a kind of motor, this motor is by the gas leakage that comprises DME steam is attracted in air suction inlet, thereby can reclaim described gas leakage.
Background technique
In the past, usining in the motor of DME (dimethyl ether) as fuel, by attracting the technology that reclaims this gas leakage in air inlet to be well known the gas leakage that comprises DME steam.In this motor, be provided with for the gas leakage producing in motor being attracted to the gas leakage pipeline in air suction inlet.Especially in order to prevent that gas leakage is discharged in atmosphere, when engine stoping operation, gas leakage pipeline is closed.When engine start, the gas leakage being full of in gas leakage pipeline can be inhaled in cylinder.Here, because the cetane number of DME (dimethyl ether) is very high, so be very easy to catch fire.Therefore, can there is spontaneous combustion in the gas leakage sucking in cylinder, thereby cause occurring detonation when engine start.
In patent documentation 1, recorded for avoiding occurring when the engine start technology of detonation.In the diesel engine of patent documentation 1, gas leakage is being attracted to, to the gas leakage pipeline in air suction inlet, via three-way magnetic valve, the open pipeline that gas leakage is discharged into the atmosphere is installed.By the control of solenoid valve, between being communicated with air suction inlet with open pipeline connection and gas leakage pipeline, gas leakage pipeline switches.In engine operation process, will leak gas and attract, in air suction inlet, when engine stoping operation, gas leakage to be discharged in atmosphere.Therefore, can when engine start, prevent that gas leakage is trapped in gas leakage pipeline.Thereby prevented from occurring detonation when starting.
Patent documentation 1: Japanese Patent Publication Unexamined Patent 10-339126 communique
Summary of the invention
In patent documentation 1, when engine stoping operation, gas leakage pipeline is communicated with all the time with open pipeline.Therefore, DME cannot arrive vapor liquid equilibrium, and DME can gasify gradually from fuel injection orifice.Thereby cause a large amount of DME fuel to be discharged in atmosphere.Therefore, the object of the present invention is to provide a kind of technology that detonation can reduce again the DME discharge amount being discharged in atmosphere that occurs engine start can be prevented time.
The first string of the present invention stops the controlling method that gas leakage is reclaimed while being to provide a kind of starting, this controlling method is for possessing the motor of gas leakage pipeline and open pipeline, described gas leakage pipeline attracts the gas leakage that comprises DME steam in air suction inlet, described open pipeline is discharged into the atmosphere described gas leakage, described controlling method comprises venting step and recycling step, wherein, described venting step is before engine start, to close described gas leakage pipeline and open described open pipeline, described recycling step is after described engine start, to open described gas leakage pipeline and close described open pipeline, when described motor is when described venting step shuts down in addition, close described gas leakage pipeline and described open pipeline.
During starting described in the first string of the present invention, stop the controlling method that gas leakage reclaims and preferably can adopt following structure (1), (2).
(1) from the moment of described engine start through starting again to carry out described recycling step after certain hour.
(2) in described venting step, after having opened described open pipeline, close again described gas leakage pipeline, in described recycling step, after having opened described gas leakage pipeline, close again described open pipeline.
The present invention can prevent that motor from when starting, detonation occurring, and can reduce the DME discharge amount being discharged in atmosphere.
Accompanying drawing explanation
Fig. 1 means the sketch of the motor that comprises the pipeline that leaks gas.
Fig. 2 stops the control flow chart that gas leakage is reclaimed while being starting.
Embodiment
Fig. 1 means the sketch of the motor 1 that comprises the pipeline 5 that leaks gas.Motor 1 is to using the diesel engine of DME as fuel.
In Fig. 1, motor 1 comprises engine main body 2, air suction inlet 3, air outlet 4, gas leakage pipeline 5, open pipeline 6, starter 7, control gear 10, the first solenoid valve BV-1 and the second solenoid valve BV-2.
Engine main body 2 comprises the major component of the motors such as piston, cylinder, crankcase.In engine main body 2, be provided with bent axle 21, CKP 22, starter (starting motor) 7.Beyond engine main body 2 deacration suction ports 3, air outlet 4 and gas leakage pipeline 5, all the other are airtight structure.
Fig. 2 stops the control flow chart that gas leakage is reclaimed while being starting.Control gear 10 stops the control that gas leakage is reclaimed in the time of can starting motor 1.The control that stops gas leakage recovery is a kind of sequence control.The control that stops gas leakage recovery when starting is the processing of carrying out successively following step S1～S8.
When motor 1 shuts down, gas leakage pipeline 5 and open pipeline 6 are closed.Therefore, in gas leakage pipeline 5, be full of in interior the produced gas leakage of engine main body 2.Now, gas leakage pipeline 5 is airtight.Therefore,, once the gas leakage being full of in gas leakage pipeline 5 reaches vapor liquid equilibrium, will stop producing gas leakage.
In motor 1, be provided with for making the switch starter of motor 1 starting.In step S1, when control gear 10 detects switch starter and is pressed, just start to stop the control that gas leakage is reclaimed.
In step S2, control gear 10 is opened the second solenoid valve BV-2.In step S3, control gear 10 cuts out the first solenoid valve BV-1.
Step S2 and S3 are the venting steps of closing gas leakage pipeline 5 and opening open pipeline 6.In venting step, the gas leakage in gas leakage pipeline 5 is discharged in atmosphere.
In step S4, control gear 10 makes starter 7 startings.By the starting of starter 7, the bent axle in engine main body 2 starts to rotate.Thereby pilot engine 1.The moment of starter 7 startings is to be for example less than the time of 1 second with the difference in the moment of motor 1 starting.
In step S5, control gear 10, within the stipulated time the moment from motor 1 starting, waits pending recycling step described later (step S6, S7).In the present embodiment, the stipulated time is 15 seconds.That is, control gear 10 before the rotating speed of bent axle reaches the rotating speed of regulation, the pending recycling step such as always.
In step S6, open the first solenoid valve BV-1.In step S3, control gear 10 cuts out the second solenoid valve BV-2.
Step S6 and S7 are the recycling steps of opening gas leakage pipeline 5 and closing open pipeline 6.In recycling step, by the gas leakage air amount suction port 3 in gas leakage pipeline 5.The gas leakage sucking is being burnt in the cylinder of engine main body 2 together with the DME fuel providing in motor 1 operation process.That is,, in recycling step, gas leakage recovery is become to fuel.
In step S8, control gear 10 finishes to stop when starting the control that gas leakage is reclaimed.
By stop the control that gas leakage is reclaimed when starting, there is following effect.In venting step, the gas leakage in gas leakage pipeline 5 is discharged in atmosphere.Then, due to before motor 1 starting, the pending recycling step such as always, therefore, in the starting process of motor 1, can gas leakage reclaims and not become fuel.That is, though motor in running but also in when starting, gas leakage is reclaimed and is also stopped.Thereby prevent from occurring detonation when starting.Then, after motor 1 starting, carry out recycling step.Therefore, gas leakage stops being discharged in atmosphere.In addition, due to when the engine stoping operation, gas leakage pipeline 5 is closed, so gas leakage can stop being discharged in atmosphere.Thereby stopping hourglass air pipe 5 with motor 1 is that situation about opening is compared all the time, can reduce the DME discharge amount being discharged in atmosphere.
Before stopping control that gas leakage reclaiming during starting and be from the moment of motor 1 starting through the stipulated time, the pending recycling step such as all always.That is,, before the slow-roll stabilization of motor 1, can prevent gas leakage air amount suction port.Thereby, can prevent from reliably occurring detonation when starting.
In addition, waiting the time of pending recycling step except self-starting rises constantly through the stipulated time, can be also till the rotating speed of motor 1 reaches regulation rotating speed.The checkout value of control gear 10 based on CKP 22, the rotating speed that can detect bent axle has reached regulation rotating speed.
Particularly, in venting step, after having opened open pipeline 6, close again gas leakage pipeline 5.Therefore, gas leakage can not drain in air suction inlet 3, thereby can be discharged in atmosphere reliably.In addition,, in recycling step, after having opened gas leakage pipeline 5, close again open pipeline 6.Therefore, gas leakage can not drain in atmosphere, thereby can be inhaled into reliably in air suction inlet 3.
Label declaration
1 motor
2 engine main bodies
5 gas leakage pipelines
6 open pipelines
7 starters
21 bent axles
BV-1 the first solenoid valve
BV-2 the second solenoid valve
Claims (2)
1. one kind stops the controlling method that gas leakage is reclaimed while starting, this controlling method is for possessing the motor of gas leakage pipeline and open pipeline, described gas leakage pipeline attracts the gas leakage that comprises DME steam in air suction inlet, described open pipeline is discharged into the atmosphere described gas leakage, described controlling method is characterised in that, comprising:
Venting step, this venting step is before engine start, to close described gas leakage pipeline and open described open pipeline; And
Recycling step, this recycling step is after described engine start, to open described gas leakage pipeline and close described open pipeline,
When described motor shuts down beyond described venting step, close described gas leakage pipeline and described open pipeline,
From the moment of described engine start through starting again to carry out described recycling step after certain hour.
2. when starting as claimed in claim 1 stops the controlling method that gas leakage is reclaimed, it is characterized in that,
In described venting step, after having opened described open pipeline, close again described gas leakage pipeline,
In described recycling step, after having opened described gas leakage pipeline, close again described open pipeline.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009146621A JP5259504B2 (en) | 2009-06-19 | 2009-06-19 | Blow-by gas reduction stop control method at startup |
| JP2009-146621 | 2009-06-19 | ||
| PCT/JP2010/060169 WO2010147132A1 (en) | 2009-06-19 | 2010-06-16 | Control method for blow-by gas recovery stoppage during startup |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102482962A CN102482962A (en) | 2012-05-30 |
| CN102482962B true CN102482962B (en) | 2014-01-29 |
Family
ID=43356448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080027453.3A Expired - Fee Related CN102482962B (en) | 2009-06-19 | 2010-06-16 | Method for controlling stoppage of reduction of blow-by gas in starting |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5259504B2 (en) |
| KR (1) | KR101269361B1 (en) |
| CN (1) | CN102482962B (en) |
| WO (1) | WO2010147132A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6010301B2 (en) * | 2012-01-20 | 2016-10-19 | 日野自動車株式会社 | Closed breather system |
| EP3625447A1 (en) | 2017-05-16 | 2020-03-25 | Volvo Truck Corporation | A system for ventilation of a crankcase |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101109343A (en) * | 2006-07-20 | 2008-01-23 | 株式会社丰田自动织机 | Fuel supply system for DME engine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10339126A (en) * | 1997-06-05 | 1998-12-22 | Nkk Corp | Diesel engine for dimethyl ether |
| JP3755495B2 (en) | 2002-08-09 | 2006-03-15 | マツダ株式会社 | Engine exhaust purification system |
| JP2009085131A (en) * | 2007-10-01 | 2009-04-23 | Toyota Motor Corp | Control device of internal combustion engine |
-
2009
- 2009-06-19 JP JP2009146621A patent/JP5259504B2/en active Active
-
2010
- 2010-06-16 CN CN201080027453.3A patent/CN102482962B/en not_active Expired - Fee Related
- 2010-06-16 KR KR1020117028698A patent/KR101269361B1/en not_active IP Right Cessation
- 2010-06-16 WO PCT/JP2010/060169 patent/WO2010147132A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101109343A (en) * | 2006-07-20 | 2008-01-23 | 株式会社丰田自动织机 | Fuel supply system for DME engine |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2009-85131A 2009.04.23 |
| JP特开平10-339126A 1998.12.22 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011001909A (en) | 2011-01-06 |
| KR20120023730A (en) | 2012-03-13 |
| WO2010147132A1 (en) | 2010-12-23 |
| JP5259504B2 (en) | 2013-08-07 |
| CN102482962A (en) | 2012-05-30 |
| KR101269361B1 (en) | 2013-05-29 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Osaka, Japan Patentee after: Yangma Power Technology Co.,Ltd. Address before: Osaka Japan Patentee before: YANMAR Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140129 |