CN202768111U - Crankcase ventilation system - Google Patents
Crankcase ventilation system Download PDFInfo
- Publication number
- CN202768111U CN202768111U CN 201220510955 CN201220510955U CN202768111U CN 202768111 U CN202768111 U CN 202768111U CN 201220510955 CN201220510955 CN 201220510955 CN 201220510955 U CN201220510955 U CN 201220510955U CN 202768111 U CN202768111 U CN 202768111U
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- CN
- China
- Prior art keywords
- crankcase
- ventilation duct
- valve
- ventilation
- ventilation pipeline
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- 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 - Lifetime
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Abstract
The utility model relates to a crankcase ventilation system which comprises a crankcase, an air inlet manifold, a throttle valve, a pressurizer and an air filter. The air filter, the pressurizer, the throttle valve and the air inlet manifold are sequentially connected through a first ventilation pipeline, an air outlet of the crankcase is connected between the throttle valve and the air inlet manifold on the first ventilation pipeline through a second ventilation pipeline, a first check valve communicated with the first ventilation pipeline is arranged on the second ventilation pipeline, a PRV (pressure relief valve) is arranged on the second ventilation pipeline between the first check valve and an air outlet of the crankcase, one end of a third ventilation pipeline is connected onto the second ventilation pipeline between the first check valve and the PRV valve, and the other end of the third ventilation pipeline is connected on the first ventilation pipeline between the air filter and the pressurizer. Pressure of the crankcase can be adjusted to fluctuate in a large range while set boundary conditions are fixed, so that the pressure requirements of front and rear oil seals of a crank can be better met, and design is simplified.
Description
Technical field
The utility model relates to a kind of engine device, particularly relates to a kind of crankcase ventilation system.
Background technique
Every car has outlet pipe that the waste gas of engine combustion is discharged outside the car, but way does not absolutely discharge waste gas, the gas of combustion that still has few part creeps in the crankcase via the gap of piston and cylinder wall, in case it is many to enter the oil gas accumulation of crankcase, will form air pressure, not only can dilute machine oil, cause motor parts insufficient lubrication, also can cause the serious consequences such as machine oil abnormal consumption.So the oil gas in the crankcase must be through separating treatment.Fig. 1 shows a kind of common crankcase ventilation system, comprise crankcase 1, the intake manifold 2 that is connected with crankcase 1, the first screen 3, the second screen 4, PCV valve 5, closure 6, pressurized machine 7, air filter 8 and the ventilation duct that connects above-mentioned device, wherein, air filter 8, pressurized machine 7, closure 6, intake manifold 2 connects successively by the first ventilation duct 11, the exhaust outlet of crankcase 1 is connected between the intake manifold 2 and closure 6 on the first ventilation duct 11 by the second ventilation duct 12, be provided with the first screen 3 and PCV valve 5 on the second ventilation duct 12, the exhaust outlet of crankcase 1 is connected in the air filter 8 on the first ventilation duct 11 by the 3rd ventilation duct 13 and saves between the pressurized machine 7, is provided with the second screen 4 on the 3rd ventilation duct 13.
When sub load (pressurized machine 7 does not work the stage), gas is mainly by the second ventilation duct 12 and 11 circulations of the first ventilation duct, being crankcase 1 gas of discharging enters behind the first ventilation duct 11 and mixes through air filter 8 filtered airs through the first screen 3 and PCV valve 5, then enters intake manifold 2; When full load (pressurized machine 8 works the stage), gas is mainly by the 3rd ventilation duct 13 and 11 circulations of the first ventilation duct, the gas that crankcase 1 is discharged mixes with process air filter 8 filtered airs after entering the first ventilation duct 11 through the second screen 4, enters intake manifold 2 under the effect of pressurized machine 7.
There is following defective in the crankcase ventilation system of this structure:
One, in the situation that set boundary conditions is all fixing, can only regulates crankcase pressure and float in a certain scope interval, basic being difficult to of the interval size of scope regulated, and requires the border relatively harsher to the bent axle front and rear oil seals;
Two, import gas in sub load (when pressurized machine does not work) from valve mechanism cover and enter intake manifold, and this part gas so easily cause speed unstable, discharges increase not by throttle control when low speed or low-load;
Three, owing to there being fresh air after air filter, to import, affect viscosity so easily make machine oil in cyclic process, be subject to the oxidation of oxygen, reduce machine oil working life.
Four, because the PCV valve is needle-valve, its flow is restricted, so more limited for the control range of crankcase pressure.
The model utility content
The purpose of this utility model provides a kind of simple in structure, to crankcase pressure can wider adjusting crankcase ventilation system.
Crankcase ventilation system of the present utility model, comprise crankcase, the intake manifold that is connected with crankcase, closure, pressurized machine, air filter, described air filter, described pressurized machine, described closure, described intake manifold connects successively by the first ventilation duct, the exhaust outlet of described crankcase is connected between the described intake manifold and described closure on the first ventilation duct by the second ventilation duct, be provided with on described the second ventilation duct to the first one-way valve of described the first ventilation duct conducting, be provided with the PRV valve on the second ventilation duct between the exhaust outlet of described the first one-way valve and described crankcase, one end of the 3rd ventilation duct is connected on the second ventilation duct between described the first one-way valve and the described PRV valve, and the other end of described the 3rd ventilation duct is connected on the first ventilation duct between described air filter and the described pressurized machine.
Crankcase ventilation system of the present utility model wherein, is provided with to the second one-way valve of described the first ventilation duct conducting on described the 3rd ventilation duct.
Crankcase ventilation system of the present utility model wherein, is provided with screen on described the second ventilation duct.
Crankcase ventilation system of the present utility model, wherein, described screen is arranged between the exhaust outlet of PRV valve and crankcase.
Crankcase ventilation system of the present utility model can be regulated crankcase pressure floating in the interval in a big way in the situation that set boundary conditions is all fixing, more easily adapts to the pressure requirement of bent axle front and rear oil seals, simplified design.
Description of drawings
Fig. 1 is the connection diagram of the crankcase ventilation system of prior art;
Fig. 2 is the connection diagram of crankcase ventilation system of the present utility model.
Embodiment
As shown in Figure 2, crankcase ventilation system of the present utility model, comprise crankcase 10, the intake manifold 11 that is connected with crankcase 10, closure 20, pressurized machine 30, air filter 40, air filter 40, pressurized machine 30, closure 20, intake manifold 11 connects successively by the first ventilation duct 1, the exhaust outlet of crankcase 10 is connected between the intake manifold 11 and closure 20 on the first ventilation duct 1 by the second ventilation duct 2, be provided with on the second ventilation duct 2 to the first one-way valve 4 of the first ventilation duct 1 conducting, be provided with PRV valve 5 on the second ventilation duct 2 between the exhaust outlet of the first one-way valve 4 and crankcase 10, one end of the 3rd ventilation duct 3 is connected on the second ventilation duct between the first one-way valve 4 and the PRV valve 5, and the other end of the 3rd ventilation duct 3 is connected on the first ventilation duct 1 between air filter 40 and the pressurized machine 30.
Crankcase ventilation system of the present utility model wherein, is provided with the second one-way valve 6 to the first ventilation duct conducting on the 3rd ventilation duct 3.The second one-way valve 6 prevents from entering the second ventilation duct 2 through air filter 40 filtered airs, and then enters crankcase 10.
Crankcase ventilation system of the present utility model wherein, is provided with screen 7 on the second ventilation duct 2.The effect of screen 7 is to make the oil droplet in the gas to separate, and when gas passes screen 7, utilizes inertia with Oil-gas Separation, so that most of oil is blocked.
Crankcase ventilation system of the present utility model, wherein, screen 7 is arranged between the exhaust outlet of PRV valve 5 and crankcase 10.The Chinese of PCV valve is pressure controlled valve, and the Chinese of PRV valve is pressure relief valve.
Crankcase ventilation system of the present utility model, wherein, PRV valve 5 is diaphragm valves, compares with the PCV valve that is generally needle-valve, PRV valve 5 control flow-rate ratios are larger.
Crankcase ventilation system of the present utility model at work, when sub load (pressurized machine 30 does not work the stage), gas is mainly by the second ventilation duct 2 and the circulation of the first ventilation duct 1, and namely crankcase 10 gas of discharging enters behind the first ventilation duct 1 with after mixing through air filter 40 filtered airs through screen 7 and PRV valve 5 and enters intake manifold 11; When full load (pressurized machine 30 works the stage), gas is mainly by the second ventilation duct 2, the 3rd ventilation duct 3 and 1 circulation of the first ventilation duct, the gas that crankcase 1 is discharged enters the 3rd ventilation duct 3 through screen 7 and PRV valve 5, then enter the first ventilation duct 1 by the 3rd ventilation duct 3, in the first ventilation duct 1 with through air filter 40 filtered airs, mix, under the effect of pressurized machine 30, enter intake manifold 11.
Pressure in the crankcase 10 under above-mentioned two kinds of loading condictions is negative pressure, and by corresponding gas and oil separating plant gasoline is separated with machine oil, prevents that machine oil is rotten.
Crankcase ventilation system of the present utility model, because the PRV valve is diaphragm valve, so can allow relatively large gas by this valve, in the situation that set boundary conditions is all fixing, so can regulate crankcase pressure is floating in the interval in a big way, more easily adapt to the pressure requirement of bent axle front and rear oil seals, simplified design.
When sub load, the gas that directly enters intake manifold in the crankcase ventilation system of the present utility model is few (because there is not fresh air to import by air filter, only be blow-by of piston part gas), very little for the impact of the low cruise of motor or low-load.
Crankcase ventilation system of the present utility model is not owing to importing fresh air, so air is extremely low to the degree of oxidation of machine oil, guarantees machine oil working life.
The above only is preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. crankcase ventilation system, it is characterized in that, comprise crankcase, the intake manifold that is connected with crankcase, closure, pressurized machine, air filter, described air filter, described pressurized machine, described closure, described intake manifold connects successively by the first ventilation duct, the exhaust outlet of described crankcase is connected between the described intake manifold and described closure on the first ventilation duct by the second ventilation duct, be provided with on described the second ventilation duct to the first one-way valve of described the first ventilation duct conducting, be provided with the PRV valve on the second ventilation duct between the exhaust outlet of described the first one-way valve and described crankcase, one end of the 3rd ventilation duct is connected on the second ventilation duct between described the first one-way valve and the described PRV valve, and the other end of described the 3rd ventilation duct is connected on the first ventilation duct between described air filter and the described pressurized machine.
2. crankcase ventilation system according to claim 1 is characterized in that, is provided with to the second one-way valve of described the first ventilation duct conducting on described the 3rd ventilation duct.
3. crankcase ventilation system according to claim 2 is characterized in that, is provided with screen on described the second ventilation duct.
4. crankcase ventilation system according to claim 3 is characterized in that, described screen is arranged between the exhaust outlet of PRV valve and crankcase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220510955 CN202768111U (en) | 2012-09-29 | 2012-09-29 | Crankcase ventilation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220510955 CN202768111U (en) | 2012-09-29 | 2012-09-29 | Crankcase ventilation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202768111U true CN202768111U (en) | 2013-03-06 |
Family
ID=47774693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220510955 Expired - Lifetime CN202768111U (en) | 2012-09-29 | 2012-09-29 | Crankcase ventilation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202768111U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111075534A (en) * | 2019-12-24 | 2020-04-28 | 中国第一汽车股份有限公司 | Crankcase ventilation system and integrity detection method thereof |
| CN111120041A (en) * | 2019-12-25 | 2020-05-08 | 中国第一汽车股份有限公司 | Crankcase ventilation system for supercharged engine and detection method of ventilation system |
| CN111502796A (en) * | 2020-04-21 | 2020-08-07 | 李斯特技术中心（上海）有限公司 | High-efficient clean control by temperature change gasoline engine oil piece-rate system |
-
2012
- 2012-09-29 CN CN 201220510955 patent/CN202768111U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111075534A (en) * | 2019-12-24 | 2020-04-28 | 中国第一汽车股份有限公司 | Crankcase ventilation system and integrity detection method thereof |
| CN111120041A (en) * | 2019-12-25 | 2020-05-08 | 中国第一汽车股份有限公司 | Crankcase ventilation system for supercharged engine and detection method of ventilation system |
| CN111502796A (en) * | 2020-04-21 | 2020-08-07 | 李斯特技术中心（上海）有限公司 | High-efficient clean control by temperature change gasoline engine oil piece-rate system |
| CN111502796B (en) * | 2020-04-21 | 2021-05-18 | 李斯特技术中心（上海）有限公司 | High-efficient clean control by temperature change gasoline engine oil piece-rate system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130306 |
|
| CX01 | Expiry of patent term |