CN201103442Y - Ventilating device of internal combustion engine - Google Patents
Ventilating device of internal combustion engine Download PDFInfo
- Publication number
- CN201103442Y CN201103442Y CNU2007200434114U CN200720043411U CN201103442Y CN 201103442 Y CN201103442 Y CN 201103442Y CN U2007200434114 U CNU2007200434114 U CN U2007200434114U CN 200720043411 U CN200720043411 U CN 200720043411U CN 201103442 Y CN201103442 Y CN 201103442Y
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- cover plate
- oil
- combustion engine
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- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The utility model relates to a ventilation device of an internal combustion engine, which can prevent a plurality of oil mist from being sucked into a combustion chamber. The utility model is characterized in that a first cover plate is arranged in a cylinder cover mask and an empty cavity is formed by the isolating of the first cover plate; the empty cavity comprises an oil-gas separation chamber and a switch control chamber; the first cover plate is sealed above the oil-gas separation chamber and a second cover plate is fixed on the switch control chamber; the second cover plate is provided with a check valve part; a pipe-work system is arranged in the control switch chamber, communicated with an intake manifold on a cylinder cover and is communicated with the control switch chamber. The ventilation device can ensure a long passing path of oil gas, improve the oil mist removing effect and can prevent excessive oil mist from entering the oil-gas separation chamber, thus improving the safety performance of the whole internal combustion engine.
Description
Technical field
The utility model relates to a kind of air-breather of internal-combustion engine, can stop a large amount of mist of oils to be drawn onto in the firing chamber, to improve the Safety performance of entire internal combustion engine.
Background technique
The rocking arm of control inlet and exhaust valve is positioned on the cylinder head in general internal-combustion engine, for rocker part is in the sealed space, thereby arrange that a hollow shell fixing seal is on cylinder head, we claim that this hollow shell is a valve mechanism cover, and we are referred to as rocker arm chamber the space that valve mechanism cover and cylinder head are formed.This rocker arm chamber is connected with base chamber, so in the time of internal combustion engine operation, temperature raises, the machine oil mist of oil in the crank box has been full of entire inner space, forms certain pressure in rocker arm chamber.
Excessive in order to prevent the rocker arm chamber internal pressure, traditional solution has first kind a vent hole is set on valve mechanism cover communicates with atmosphere, this method befouling environment, second kind is communicated with rocker arm chamber and air-strainer with a pipe, can prevent from like this to pollute, but also can produce certain problem.On the one hand, mist of oil causes air cleaner cartridge to stop up too early, empty filter is stopped up and is caused intake manifold to produce a large amount of negative pressure, negative pressure is delivered to and causes machine oil to be sucked in crank box the firing chamber in the rocker arm chamber, the machine oil burning all damages operator and motor, the 3rd is not connected to rocker arm chamber the air-strainer filter cylinder, can be directly connected to intake manifold.Though this method has avoided air cleaner cartridge to stop up too early, but there is part machine oil mist of oil to go in the firing chamber burned.
Vacuum values in intake manifold surpasses predetermined range, and after stopping up such as air-strainer, above scheme can not solve the problem that lubricant oil is inhaled into the firing chamber.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, thereby a kind of air-breather of internal-combustion engine is provided, and can guarantee the path length that passes through of oil gas, improves the removal effect of mist of oil; Can prevent that too much mist of oil from entering the Oil-gas Separation chamber, to improve the Safety performance of entire internal combustion engine.
Main solution of the present utility model is achieved in that
The utility model comprises the rocking arm of valve mechanism cover, cylinder head and operation inlet and exhaust valve, and feature is to be provided with first cover plate in valve mechanism cover, is isolated forming cavity by first cover plate, and cavity comprises Oil-gas Separation chamber and control switch chamber; First cover plate is enclosed in above the Oil-gas Separation chamber; Fix second cover plate on the control switch chamber, on second cover plate one-way valve member is installed, it is indoor that pipe-line system is arranged on control switch, and pipe-line system communicates with intake manifold on the cylinder head, and be communicated with the control switch chamber.
When the rocker arm chamber internal pressure surpasses operating range, the control switch chamber opening communicates with intake manifold, filter good gas (not containing the machine oil mist of oil) and enter into intake manifold, thereby the internal combustion engines pressure recovery is normal, the machine oil that filters out is got back in the crankcase by the oil return route.
In normal operation, control switch is unresponsive to the intake manifold internal pressure, pressure in rocker arm chamber exceeds normal range of operation, inlet manifold there is certain effective pressure, this pressure is pushed the breathing shell fragment open makes rocker arm chamber be communicated with intake manifold, at this moment filter good gas (not containing the machine oil mist of oil) and enter into intake manifold, when this non-normal working pressure reduces to disappear gradually, breathe shell fragment and recover closed condition.The machine oil liquid overwhelming majority who separates is back in the rocker arm chamber from entry port, also have sub-fraction to return rocker arm chamber by the draining orifice flow, draining hole and Oil-gas Separation chamber are all in the upstream of control switch chamber, and the machine oil of separating like this has sufficient room and time to flow back to rocker arm chamber.
Described first cover plate is provided with a through hole, and baffle plate is arranged on the first cover plate ingress, and the shape of baffle plate is the same with the shape of through hole.
Described Oil-gas Separation chamber communicates with rocker arm chamber.The indoor one deck filter screen that is provided with in described Oil-gas Separation chamber.
The indoor periphery in described Oil-gas Separation chamber is provided with an opening at least.The gas of separating can be led to place, control switch chamber like this, the machine oil on the filter screen is discharged by the through hole on first cover plate.
Be provided with a dividing plate between described Oil-gas Separation chamber and the control switch chamber, add the path of long-channel.
Described control switch is provided with second cover plate above the chamber, on second cover plate one-way valve member is installed.Described one-way valve member comprises the breathing shell fragment and breathes the sheet pressing plate that it is indoor that breathing shell fragment and breathing sheet pressing plate are arranged on control switch.
Described second cover plate is provided with the draining hole.
Described Oil-gas Separation chamber interior is stretched out a tiny pillar.Under the normal working, this pillar is to support baffle plate, but the vacuum values in intake manifold surpasses predetermined range, after the air-strainer obstruction, baffle plate is applied to pressure on the pillar and has exceeded its amount of bearing, pillar is destroyed, and at this moment the baffle plate that shape is the same with shape of through holes is blocked through hole, stops a large amount of mist of oils to be drawn onto in the firing chamber.
Compared with the prior art the utility model has the following advantages:
The utility model is simple, compact and reasonable for structure; Owing in valve mechanism cover, form two chambers, can guarantee the path length that passes through of oil gas, and can improve the removal effect of mist of oil; These two chambers are all in valve mechanism cover inside, and do not influence the surface structure of valve mechanism cover; Retaining mist of oil structure is set in the cover plate ingress, before oil gas enters the Oil-gas Separation chamber interior, with the part mist of oil attached on the oil baffle structure and be removed, can prevent that too much mist of oil from entering the Oil-gas Separation chamber, cause mist of oil directly to suck in the intake manifold in indoor can't effectively separation of Oil-gas Separation, suck the too high oil gas of oil content in the air inlet quickly and can cause engine performance to descend, exhaust emissions increases; This kind structure low cost of manufacture, applicable various type, vertical, inclined, horizontal, single cylinder engine, multi-cylinder engine; Can stop a large amount of mist of oils to be drawn onto in the firing chamber, to improve the Safety performance of entire internal combustion engine.
Description of drawings
Fig. 1 is the utility model worm's eye view.
Fig. 2 is the sectional drawing of A-A among the utility model Fig. 1.
Fig. 3 is the dismantle worm's eye view of valve mechanism cover of cover plate of the utility model.
Fig. 4 is the sectional view of the utility model pipe-line system.
Embodiment
Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:
The utility model mainly is made up of vestibule 19 on valve mechanism cover 1, second cover plate 2, the rocking arm 3 of operating inlet and exhaust valve, first cover plate 4, cavity 5, Oil-gas Separation chamber 6, control switch chamber 7, one-way valve member 8 (breathe shell fragment 8a, breathe sheet pressing plate 8b), pipe-line system 9, cylinder head 10, intake manifold 11, filter screen 12, through hole 13, opening 14, draining hole 15, pillar 16, gas exhaust manifold 17, valve mechanism cover hole 18, the intake manifold and rocker arm chamber 20 etc.
As Fig. 1～shown in Figure 4: the utility model is to comprise valve mechanism cover 1, includes the rocking arm 3 of operating inlet and exhaust valve in valve mechanism cover 1.Be provided with an intake manifold 11 and a gas exhaust manifold 17 in cylinder head 10, the former is connected with air-strainer (not showing), and the latter is connected with outlet pipe (not showing).With the same usually, intake manifold 11 and gas exhaust manifold 17 communicate with the firing chamber by corresponding inlet and exhaust valve.In addition, connect (Fig. 4) with pressure spring between inlet and exhaust valve and the rocking arm 3.Though do not show, should be noted that the other end of rocking arm is subjected to the effect of push rod.
Engine crankcase comprises the zone of lubricant oil (machine oil) communicating by the top of push rod chamber with cylinder head 10.Valve mechanism cover 1 covers 3 component such as grade of the rocking arm on the cylinder head.The hole 18 that is provided with on the valve mechanism cover 1 can be fixed to valve mechanism cover 1 on the cylinder head 10.In addition, valve mechanism cover 1 also comprises a respiratory system, and the inside of valve mechanism cover is linked to each other with the vestibule 19 (Fig. 4) of opening on intake manifold.Be provided with first cover plate 4 in valve mechanism cover 1, isolated forming cavity 5 (respiratory system) by first cover plate 4, cavity 5 (respiratory system) comprises first Room and second Room, and they are all in valve mechanism cover 1 inside.First Room is Oil-gas Separation chamber 6; Second Room is control switch chamber 7.Oil-gas Separation chamber 6 is located at the upstream of control switch chamber 7, is provided with a dividing plate 4b between described Oil-gas Separation chamber 6 and the control switch chamber 7, and purpose is the path that adds long-channel.First cover plate 4 is enclosed in above the Oil-gas Separation chamber 6; Two chambers and rocker arm chamber 20 are kept apart, and first cover plate 4 is provided with a baffle plate 4a, and the through hole on the baffle plate 4a is communicated with these two chambers with rocker arm chamber 20.First Room is to put an amount of filter screen 12 in the Oil-gas Separation chamber 6, most machine oil mist of oils here separates and hoards, and the oil droplet of formation flows back to rocker arm chamber from through hole, and the machine oil of small part is by opening 14, the passageway hoards once more, and the oil droplet of formation flow back into rocker arm chamber from spill port 15.
Second Room is that control switch chamber 7 is the terminals in passageway, fixes on control switch chamber 7 on second cover plate, 2, the second cover plates 2 one-way valve member 8 is installed.This chamber is formed by second cover plate 2, one-way valve member 8 with to the partition wall of rocker arm chamber 20 elongations, and second cover plate 2, one-way valve member 8 also are fixed on the partition wall.One-way valve member 8 comprises breathes shell fragment 8a and breathes sheet pressing plate 8b, breathes shell fragment 8a and breathe sheet pressing plate 8b to be arranged in the control switch chamber 7.Spill port 15 is located on second cover plate 2, and it is in the lowest order in control room.The highest order place is provided with a pipe-line system 9 in control switch chamber 7, and the vestibule 19 on intake manifold 11 is communicated with control switch chamber 7 and opening for they.In normal operation, breathing shell fragment 8a is unresponsive to intake manifold 11 internal pressures, pressure in rocker arm chamber 20 exceeds normal range of operation, inlet manifold 11 there is certain effective pressure, this pressure is pushed breathing shell fragment 8a open makes rocker arm chamber 20 be communicated with intake manifold 11, at this moment pass through gas separated (not containing the machine oil mist of oil) and enter into intake manifold 11, when this non-normal working pressure reduces to disappear gradually, breathe shell fragment 8a and recover closed condition.
Be provided with a through hole 13 on first cover plate 4, baffle plate 4a is arranged on first cover plate, 4 ingress, and the shape of baffle plate 4a is the same with the shape of through hole 13, and baffle plate 4a is in the outside of cavity 5.Before oil gas enters 6 inside, Oil-gas Separation chamber, the part mist of oil attached to going up, baffle plate 4a is removed, can prevent that too much mist of oil from entering Oil-gas Separation chamber 6, cause mist of oil in Oil-gas Separation chamber 6, can't effectively separate and directly suck in the intake manifold 11, suck the too high oil gas of oil content in the air inlet quickly and can cause engine performance to descend, exhaust emissions increases.This baffle plate 4a also has a very crucial effect, be exactly to surpass predetermined range when intake manifold 11 interior vacuum values, after the air-strainer obstruction, baffle plate 4a is applied to pressure on the pillar 16 and has exceeded its amount of bearing, pillar is fractureed, at this moment the baffle plate 4a that shape is the same with shape of through holes blocks through hole 13, stops a large amount of mist of oils to be drawn onto in the firing chamber.Thereby internal-combustion engine is out of service, the generation of the incident that prevents, the Safety performance of the entire internal combustion engine of raising.
Claims (10)
1, a kind of air-breather of internal-combustion engine, comprise valve mechanism cover (1), the rocking arm (3) of cylinder head (10) and operation inlet and exhaust valve, it is characterized in that in valve mechanism cover (1), being provided with first cover plate (4), by first cover plate (4) isolation formation cavity (5), cavity (5) comprises Oil-gas Separation chamber (6) and control switch chamber (7), on control switch chamber (7), be fixed with second cover plate (2), second cover plate (2) is gone up one-way valve member (8) is installed, pipe-line system (9) is arranged in the control switch chamber (7), pipe-line system (9) communicates with intake manifold (11) on the cylinder head (10), and is communicated with control switch chamber (7).
2, the air-breather of a kind of internal-combustion engine according to claim 1 is characterized in that described first cover plate (4) is provided with through hole (13).
3, the air-breather of a kind of internal-combustion engine according to claim 1 is characterized in that described first cover plate (4) ingress is provided with baffle plate (4a).
4, the air-breather of a kind of internal-combustion engine according to claim 1 is characterized in that described Oil-gas Separation chamber (6) communicates with rocker arm chamber (20).
5,, it is characterized in that being provided with in the described Oil-gas Separation chamber (6) one deck filter screen (12) and stretch out a pillar (16) according to the air-breather of claim 1 or 4 described a kind of internal-combustion engines.
6, a kind of air-breather of internal-combustion engine according to claim 1 or 5 is characterized in that described Oil-gas Separation chamber (6) inner periphery is provided with an opening (14) at least.
7,, it is characterized in that being provided with dividing plate (4b) between described Oil-gas Separation chamber (6) and control switch chamber (7) according to the air-breather of claim 1 or 6 described a kind of internal-combustion engines.
8, the air-breather of a kind of internal-combustion engine according to claim 1 is characterized in that being provided with above the described control switch chamber (7) second cover plate (2), and second cover plate (2) is gone up one-way valve member (8) is installed.
9, the air-breather of a kind of internal-combustion engine according to claim 1, it is characterized in that described one-way valve member (8) comprises breathing shell fragment (8a) and breathes sheet pressing plate (8b), breathes shell fragment (8a) and is arranged in the control switch chamber (7) with breathing sheet pressing plate (8b).
10, the air-breather of a kind of internal-combustion engine according to claim 8 is characterized in that described second cover plate (2) is provided with draining hole (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200434114U CN201103442Y (en) | 2007-10-31 | 2007-10-31 | Ventilating device of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200434114U CN201103442Y (en) | 2007-10-31 | 2007-10-31 | Ventilating device of internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201103442Y true CN201103442Y (en) | 2008-08-20 |
Family
ID=39950467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200434114U Expired - Fee Related CN201103442Y (en) | 2007-10-31 | 2007-10-31 | Ventilating device of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201103442Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102791969A (en) * | 2010-03-10 | 2012-11-21 | 铃木株式会社 | Breather device for engine for two-wheeled motor vehicle |
| CN105464750A (en) * | 2015-10-22 | 2016-04-06 | 隆鑫通用动力股份有限公司 | Oil-gas separation type cylinder head cover assembly and engine thereof |
-
2007
- 2007-10-31 CN CNU2007200434114U patent/CN201103442Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102791969A (en) * | 2010-03-10 | 2012-11-21 | 铃木株式会社 | Breather device for engine for two-wheeled motor vehicle |
| CN102791969B (en) * | 2010-03-10 | 2014-10-15 | 铃木株式会社 | Breather device for engine for two-wheeled motor vehicle |
| CN105464750A (en) * | 2015-10-22 | 2016-04-06 | 隆鑫通用动力股份有限公司 | Oil-gas separation type cylinder head cover assembly and engine thereof |
| CN105464750B (en) * | 2015-10-22 | 2019-04-23 | 隆鑫通用动力股份有限公司 | Oil-gas Separation type cylinder head cap assemblies and its engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080820 Termination date: 20091130 |