CN103256099A - Electric crankcase ventilation system - Google Patents
Electric crankcase ventilation system Download PDFInfo
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- CN103256099A CN103256099A CN2013100567525A CN201310056752A CN103256099A CN 103256099 A CN103256099 A CN 103256099A CN 2013100567525 A CN2013100567525 A CN 2013100567525A CN 201310056752 A CN201310056752 A CN 201310056752A CN 103256099 A CN103256099 A CN 103256099A
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- crankcase
- pressure
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- ventilation system
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Abstract
The invention discloses an electric crankcase ventilation system and provides a ventilation system accurate in control. The electric crankcase ventilation system comprises a crankcase of an engine, an air incoming manifold, an oil-gas separator, an air filter and an air incoming hose, the crankcase is connected with an electric ventilation device through the oil-gas separator, the electric ventilation device comprises a check valve connected with the oil-gas separator, an output end of the check valve is connected with an input end of an electric air pump, an output end of the electric air pump is connected with the air incoming manifold, the electric air pump is controlled by a pressure start switch, a pressure detection end of the pressure start switch is communicated withe the crankcase, the air filter is connected with the air incoming manifold through the air incoming hose, and the air incoming manifold and the crankcase are communicated. The electric crankcase ventilation system can ba applied to various automobiles and has the advantages of capability of realizing real-time closed-loop control on pressure of the crankcase, high flow characteristic accuracy, good adaptability to working condition changes, and capability of normally working when the engine is in an inclined state or in high and low-temperature environments.
Description
Technical field
The invention belongs to technical field of engines, be specifically related to a kind of engine crankshaft ventilation system.
Background technique
Hyundai Motor is more and more stricter for the requirement of discharging, and the design quality of automobile engine crankshaft box ventilation system is for preventing that machine oil is rotten, important influence is consequently discharged in dilution.Traditional crankcase ventilation system adopts positive crankcase ventilation(PCV) mostly, and this device is adjusted the size that pressure difference between crankcase and the suction tude is controlled the waste gas discharge capacity by mechanical type PCV valve, and crankcase pressure is stabilized in the suitable scope.
For example Chinese patent application numbers 201110109535.9, name is called the patent of invention of " engine crankshaft ventilation system ", a kind of engine crankshaft ventilation system is disclosed, the molding and forming of valve chamber cover body, adopt the friction welding mode with the labyrinth type oil gas separating device, integrated PCV valve and valve chamber cover body combine, dunnage and lower supporting plate are installed in valve chamber cover body bottom, upper backup pad and valve chamber cover body form airtight cavity volume, upper backup pad and lower supporting plate form back oil road, the air barge board is installed in the airtight cavity volume that upper backup pad and valve chamber cover body form, on the air barge board adsorbate is installed.This crankcase ventilation system namely is that application PCV valve is that the master constitutes, and for example plunger type PCV valve is the pressure reduction by spring Inductance valve both sides, promotes valve core movement with the size of control throughput, and this mechanical PCV valve has following shortcoming:
The combined factors such as size of crankcase gas leakage required to determine when 1, the performance characteristic parameter of PCV valve will be according to the various operating modes of motor and each operating mode, the calculation Design of Flow characteristics inadequately precisely and design difficulty bigger;
2, be difficult to correspondingly make accurately and adjust in time according to the different operating modes of automobile, can not be issued to the technical requirements of desirable crankcase pressure in all operating modes;
3, PCV valve generation gas leak phenomenon easy to wear causes the too high and rotary speed unstabilization fault of idling;
4, winter, easy freezing caused stuck fault.
Summary of the invention
The technical issues that need to address of the present invention are, the crankcase ventilation system that overcomes prior art uses that PCV valve Flow characteristics precision is low, working conditions change bad adaptability, gas leakage easy to wear, the easy stuck defective of freezing, and provides a kind of by detecting the control of crankcase pressure difference real-time closed-loop to control the crankcase ventilation system of engine crankcase pressure accurately.
The objective of the invention is to be achieved by following technical proposals: a kind of electrodynamic type crankcase ventilation system, the crankcase that comprises motor, intake manifold, deaerator, air-strainer and air induction hose, crankcase is connected with the electrodynamic type ventilation plant by deaerator, the electrodynamic type ventilation plant comprises the one-way valve that is connected with deaerator, the output terminal of one-way valve is connected with the input end of electric air pump, the output terminal of electric air pump is connected with intake manifold, electric air pump is controlled by pressure starting switch, and the Pressure testing end of pressure starting switch is communicated with crankcase; Air-strainer is connected with intake manifold by air induction hose, and intake manifold is communicated with crankcase.
Waste gas in the crankcase is because pressure difference enters deaerator, electric air pump is extracted the waste gas in the deaerator out by one-way valve, and deliver into intake manifold, the action of electric air pump is controlled by pressure starting switch, pressure starting switch is according to the checkout value control action of crankcase waste gas pressure, whole system constitutes closed loop control system, and control accuracy is accurate, stable.
As preferably, the electrodynamic type ventilation plant carries out closed loop control in real time by pressure difference, and the closed loop control precision is 0.2kPa.
As preferably, pressure starting switch is controlled the switch of circuit according to the size of engine crankcase pressure, when crankcase pressure switch connection during greater than a certain setting value Px, otherwise, when crankcase pressure during less than a certain setting value Px switch disconnect, crankcase pressure setting value Px is according to the property settings of different motors.
As preferably, the pressure range of diesel engine crankcase is set at-2.5kPa～1kPa; The pressure range of gasoline engine crank case is set at-2.5kPa～0kPa.
The invention has the beneficial effects as follows:
1, this crankcase ventilation system ventilates by detecting the control of crankcase pressure difference real-time closed-loop, can control engine crankcase pressure accurately;
2, the waste gas that goes out of crankcase string is discharged by electric air pump, and Flow characteristics precision height, working conditions change adaptability are good;
3, being in heeling condition or height, end temperature environment lower crankcase ventilation system at motor all can proper functioning;
4, prevent effectively that machine oil is rotten, faults such as dilution, burn oil and oil sealing seepage machine oil.
Description of drawings
Fig. 1 is the functional-block diagram of an embodiment of the present invention.
Among the figure, crankcase 1; Intake manifold 2; Deaerator 3; Air-strainer 4; Air induction hose 5; Bypass 51; Electrodynamic type ventilation plant 6; One-way valve 61; Electric air pump 62; Pressure starting switch 63; Output tube 64; Detecting tube 65.
Embodiment
Below in conjunction with accompanying drawing and specific embodiments the present invention is further described.
Embodiment: as shown in Figure 1, a kind of electrodynamic type crankcase ventilation system, the crankcase 1 that comprises motor, intake manifold 2, deaerator 3, air-strainer 4 and air induction hose 5, crankcase 1 is connected with electrodynamic type ventilation plant 6 by deaerator 3, electrodynamic type ventilation plant 6 comprises the one-way valve 61 that is connected with deaerator 3, the input end of one-way valve 61 is connected with deaerator 3, the output terminal of one-way valve 61 is connected with the input end of electric air pump 62, the output terminal of electric air pump 62 is connected with intake manifold 2, electric air pump 62 is by pressure starting switch 63 controls, and the Pressure testing end of pressure starting switch 63 is communicated with crankcase 1; Air-strainer 4 is connected with intake manifold 2 by air induction hose 5, and intake manifold 2 is communicated with crankcase 1.Electrodynamic type ventilation plant 6 carries out closed loop control in real time by pressure difference, and the closed loop control precision is 0.2kPa.
The pressure range of diesel engine crankcase is set at-2.5kPa～1kPa; The pressure range of gasoline engine crank case is set at-2.5kPa～0kPa.
Waste gas in the crankcase 1 is because pressure difference enters deaerator 3, electric air pump 62 is extracted the waste gas in the deaerator 3 out by one-way valve 61, and deliver into intake manifold 2 by output tube 64, the action of electric air pump 62 is by pressure starting switch 63 controls, pressure starting switch 63 is according to the checkout value control action of crankcase 1 exhaust gas pressure, whole system constitutes closed loop control system, and control accuracy is accurate, stable, can avoid the existing all drawbacks of mechanical ventilation plant.
Particularly, after the engine start operation, the engine crankcase internal pressure can increase.When pressure surpasses setting value Px, for example-during 2kPa, then pressure starting switch 63 is connected, electric air pump 62 energisings bring into operation, waste gas in the crankcase 1 is drained into intake manifold 2, mix the burning that participates in again in the cylinder with stream from the air-flow of air induction hose, the part fresh air of air induction hose can directly enter crankcase by bypass 51 and replenish crankcase pressure; When the engine crankcase internal pressure less than value during Px, then pressure starting switch 63 is closed, electric air pump 62 outages are out of service, and the pressure in the crankcase 1 is remained at-2kPa.Therefore the electrodynamic type crankcase ventilation system can be controlled engine crankcase pressure accurately, makes vehicle obtain more gratifying emission performance.
The present invention can use in the crankcase ventilation system of various automobiles, it is good to have real-time closed-loop control crankcase pressure, Flow characteristics precision height, working conditions change adaptability, and be in the advantage that heeling condition or height, end temperature environment lower crankcase ventilation system all can proper functioning at motor, if those skilled in the art does simple the modification or replacement to the foregoing invention content, such change can not be thought to depart from the scope of the present invention, and all will be included within the scope of claim of the present invention the apparent modification of those skilled in the art like this.
Claims (4)
1. electrodynamic type crankcase ventilation system, the crankcase, intake manifold, deaerator, air-strainer and the air induction hose that comprise motor, it is characterized in that, crankcase is connected with the electrodynamic type ventilation plant by deaerator, the electrodynamic type ventilation plant comprises the one-way valve that is connected with deaerator, the output terminal of one-way valve is connected with the input end of electric air pump, the output terminal of electric air pump is connected with intake manifold, electric air pump is controlled by pressure starting switch, and the Pressure testing end of pressure starting switch is communicated with crankcase; Air-strainer is connected with intake manifold by air induction hose, and intake manifold is communicated with crankcase.
2. electrodynamic type crankcase ventilation system according to claim 1 is characterized in that, the electrodynamic type ventilation plant carries out closed loop control in real time by pressure difference, and the closed loop control precision is 0.2kPa.
3. electrodynamic type crankcase ventilation system according to claim 1 and 2, it is characterized in that, pressure starting switch is controlled the switch of circuit according to the size of engine crankcase pressure, when crankcase pressure switch connection during greater than a certain setting value Px, otherwise, when crankcase pressure during less than a certain setting value Px switch disconnect, crankcase pressure setting value Px is according to the property settings of different motors.
4. electrodynamic type crankcase ventilation system according to claim 3 is characterized in that, the pressure range of diesel engine crankcase is set at-2.5kPa～1kPa; The pressure range of gasoline engine crank case is set at-2.5kPa～0kPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100567525A CN103256099A (en) | 2013-02-22 | 2013-02-22 | Electric crankcase ventilation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100567525A CN103256099A (en) | 2013-02-22 | 2013-02-22 | Electric crankcase ventilation system |
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| CN103256099A true CN103256099A (en) | 2013-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100567525A Pending CN103256099A (en) | 2013-02-22 | 2013-02-22 | Electric crankcase ventilation system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982267A (en) * | 2014-05-21 | 2014-08-13 | 安徽江淮汽车股份有限公司 | Diesel engine oil-gas separator |
| CN105518260A (en) * | 2013-09-10 | 2016-04-20 | 通用汽车环球科技运作公司 | Crankcase ventilation device for vehicle |
| TWI664348B (en) * | 2018-11-27 | 2019-07-01 | National Formosa University | Active internal combustion engine piston air pressure reducing device |
| CN111636949A (en) * | 2020-06-17 | 2020-09-08 | 浙江吉利新能源商用车集团有限公司 | Closed crankcase ventilation system of heavy engine system and heavy engine system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4404950A (en) * | 1982-02-09 | 1983-09-20 | Dallman Alfred C | Automotive fuel saving system |
| DE10043796A1 (en) * | 2000-09-06 | 2002-03-14 | Daimler Chrysler Ag | Active system venting crank case efficiently and adequately at correct point in engine cycle, comprises simple vent line from crank case to inlet manifold |
| US20040112346A1 (en) * | 2001-03-07 | 2004-06-17 | Stephan Ahlborn | Device for the ventilation of the crankcase of an internal combustion engine |
| CN1924308A (en) * | 2005-08-29 | 2007-03-07 | 奇瑞汽车有限公司 | Engine crankshaft ventilation system |
| CN1924309A (en) * | 2005-08-29 | 2007-03-07 | 奇瑞汽车有限公司 | Diesel engine crankshaft ventilation system |
| CN101144406A (en) * | 2007-11-09 | 2008-03-19 | 奇瑞汽车有限公司 | Crankcase pressure control system |
| JP2009275632A (en) * | 2008-05-15 | 2009-11-26 | Toyota Motor Corp | Internal combustion engine |
| CN101704363A (en) * | 2009-09-21 | 2010-05-12 | 奇瑞汽车股份有限公司 | Vehicle vacuum system |
-
2013
- 2013-02-22 CN CN2013100567525A patent/CN103256099A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4404950A (en) * | 1982-02-09 | 1983-09-20 | Dallman Alfred C | Automotive fuel saving system |
| DE10043796A1 (en) * | 2000-09-06 | 2002-03-14 | Daimler Chrysler Ag | Active system venting crank case efficiently and adequately at correct point in engine cycle, comprises simple vent line from crank case to inlet manifold |
| US20040112346A1 (en) * | 2001-03-07 | 2004-06-17 | Stephan Ahlborn | Device for the ventilation of the crankcase of an internal combustion engine |
| CN1924308A (en) * | 2005-08-29 | 2007-03-07 | 奇瑞汽车有限公司 | Engine crankshaft ventilation system |
| CN1924309A (en) * | 2005-08-29 | 2007-03-07 | 奇瑞汽车有限公司 | Diesel engine crankshaft ventilation system |
| CN101144406A (en) * | 2007-11-09 | 2008-03-19 | 奇瑞汽车有限公司 | Crankcase pressure control system |
| JP2009275632A (en) * | 2008-05-15 | 2009-11-26 | Toyota Motor Corp | Internal combustion engine |
| CN101704363A (en) * | 2009-09-21 | 2010-05-12 | 奇瑞汽车股份有限公司 | Vehicle vacuum system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105518260A (en) * | 2013-09-10 | 2016-04-20 | 通用汽车环球科技运作公司 | Crankcase ventilation device for vehicle |
| CN105518260B (en) * | 2013-09-10 | 2018-06-08 | 通用汽车环球科技运作公司 | Vehicle crank shaft case ventilation device |
| CN103982267A (en) * | 2014-05-21 | 2014-08-13 | 安徽江淮汽车股份有限公司 | Diesel engine oil-gas separator |
| TWI664348B (en) * | 2018-11-27 | 2019-07-01 | National Formosa University | Active internal combustion engine piston air pressure reducing device |
| CN111636949A (en) * | 2020-06-17 | 2020-09-08 | 浙江吉利新能源商用车集团有限公司 | Closed crankcase ventilation system of heavy engine system and heavy engine system |
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Application publication date: 20130821 |