CN101131133A - Sprocket wheel shroud with crankcase ventilation labyrinth - Google Patents
Sprocket wheel shroud with crankcase ventilation labyrinth Download PDFInfo
- Publication number
- CN101131133A CN101131133A CNA2007100303273A CN200710030327A CN101131133A CN 101131133 A CN101131133 A CN 101131133A CN A2007100303273 A CNA2007100303273 A CN A2007100303273A CN 200710030327 A CN200710030327 A CN 200710030327A CN 101131133 A CN101131133 A CN 101131133A
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- China
- Prior art keywords
- labyrinth
- crankcase ventilation
- path
- lid
- dividing plate
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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.)
- Pending
Links
- 238000009423 ventilation Methods 0.000 title claims description 20
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 11
- 239000010705 motor oil Substances 0.000 abstract 2
- 239000010721 machine oil Substances 0.000 description 15
- 239000007789 gas Substances 0.000 description 13
- 239000003921 oil Substances 0.000 description 10
- 238000000926 separation method Methods 0.000 description 5
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
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- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The present invention relates to one kind of timing chain wheel cover with crankcase ventilating labyrinth, and aims at reducing engine oil leakage of the crankcase ventilating system during high speed running of the engine and reducing engine oil consumption of engine. The technological scheme includes setting one labyrinth passage for ventilating crankcase on the timing chain wheel cover and setting one hose communicating the upper part of the labyrinth passage to the oil-gas separator. The present invention has the space over the timing chain wheel cover utilized reasonably and can separate oil-gas mixture initially.
Description
Technical field
The present invention relates to engine art, specifically is exactly the new structure of engine timing chain wheel cover.
Background technique
Motor is in the process of running, can produce fuel-air mixture in the crankcase, mainly comprise combustor inner cylinder product, fuel oil, machine oil steam and machine oil particulate etc. afterwards, in order to reduce the pollution to environment, these gases can not directly be discharged in the atmosphere, generally be to draw by the valve chamber cover of engine air valve device top, behind crankcase bleeder elimination machine oil, suck suction tude, feed back in the gas handling system, by the burning in the cylinder, discharge by vent systems then again.But when high engine load, when running up, machine oil in the valve mechanism can produce strong splashing, crankcase bleeder in the valve chamber cover can seriously be scurried oil, crankcase bleeder is the machine oil in the elimination mixed gas fully, cause the gas that feeds back in the gas handling system to contain a large amount of machine oil, the phenomenon of burn oil occurs and increase the consumption of machine oil.
Summary of the invention
The purpose of this invention is to provide a kind of timing sprocket shroud with crankcase ventilation labyrinth, solve motor at high load, when running up, it is serious that valve chamber cover inside crankshaft box ventilation system is scurried oil, improves the oil consumption of scurrying oily phenomenon and reducing motor.
A kind of timing sprocket shroud with crankcase ventilation labyrinth, it is characterized in that: on the top at the timing chain wheel cap body back side labyrinth path that one staggered crankcase ventilation is used is set, the top of labyrinth path is provided with a through hole and is used for linking to each other with the flexible pipe of deaerator.
The above-mentioned timing chain wheel cap body back side is meant the end face of going along with sb. to guard him in timing sprocket one side.When the timing system of motor adopt be chain transmission the time, timing sprocket shroud not only will reach the dust-tight function, will prevent that also the oil leak of lubricated chain drive system from going out, timing sprocket shroud generally can adopt metal ceramic but not plastic parts for this reason.So structurally be stamped similarity with cyclinder head cover.The present invention has reasonably utilized himself space, arranges the labyrinth of crankcase ventilation system on it, to reach the function of initial gross separation fuel-air mixture.
Adopt the chaindriven motor of timing, the timing sprocket shroud of its front-end face is inboard to communicate with crankcase, oil sump.Adopt timing sprocket shroud provided by the invention, most of fuel-air mixture in the crankcase can be directly rises to the labyrinth path of timing sprocket shroud in the crankcase, has only the fuel-air mixture of a little to rise in the valve mechanism by the oilhole of scurrying on cylinder body, the cylinder cap at this moment.Even the interior machine oil of valve mechanism this moment has splash phenomena, but, just can not scurry the phenomenon of oil because valve chamber cover no longer is guided out fuel-air mixture yet.Moreover because the oil level in the timing sprocket shroud is fewer, fuel-air mixture is through being also can not scurry too many machine oil herein, thereby can obviously improve crankcase ventilation system at high load, scurry oily phenomenon when running up.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the plan view of Fig. 1;
Fig. 3 is the right elevation of Fig. 1;
Fig. 4 is a structural representation of the present invention;
Fig. 5 is the right elevation of Fig. 4;
Fig. 6 is the plan view of Fig. 4;
Fig. 7 is a sectional perspective structural representation of the present invention.
Embodiment
Fig. 1,4 has provided the main structure of the timing sprocket shroud of band crankcase ventilation labyrinth, on the top at timing chain wheel cap body 10 back sides labyrinth path 20 that one staggered crankcase ventilation is used is set, the top of labyrinth path 20 is provided with a through hole 30 and is used for linking to each other with the flexible pipe of deaerator, simultaneously in conjunction with Fig. 2,3,5,6,7
As shown in the figure, described labyrinth path 20 comprises the dividing plate 21 that is arranged on lid 10 back sides, dividing plate 21 shape of reporting to the leadship after accomplishing a task at interval arranges that from bottom to top dividing plate 21 is provided with cover plate 22, and the circuitous shape zone that surrounds between lid 10, dividing plate 21 and the cover plate 22 constitutes labyrinth path 20.The path of Gou Chenging is circuitous shape thus, and like this, the mixed gas that can tentatively filter machine oil feeds back in the deaerator again, thereby realizes the function of crankcase ventilation system separation oil and gas mixed gas.
Described labyrinth path 20 comprises and is arranged on lid 10 and the plate face coaming plate 23 parallel with a side sidewall 11, and connects the last end coaming 24 between coaming plate 23 and the sidewall 11, and dividing plate 21 is arranged in the groove shape zone of coaming plate 23,24 and a side sidewall 11 formations.Utilize sidewall 11 positions of lid 10 that coaming plate 23 rationally is set like this, again dividing plate 21 is arranged in the groove shape zone in, so just made full use of the inner space of lid 10, arranged labyrinth path 20 dexterously.
Described dividing plate 21, coaming plate 23 are perpendicular to lid 10 end faces, the height of described dividing plate 21, coaming plate 23,24 is identical, can make things convenient for the installation of cover plate 22 like this, and the height of described cover plate 22 is lower than the end face that combines with cylinder body on the lid 10, and the timing chain wheel cap body 10 of having arranged labyrinth path 20 can not interfered with being connected of cylinder body, cylinder cap.During concrete the connection, cover plate 22 connects by six cruciform slot screws.
The end that described dividing plate 21 is positioned at path middle part is lower than the height that it is positioned at position, path both sides, as shown in Figure 1, arranges that like this dividing plate 21 helps the backflow of machine oil, guarantees that dividing plate 21 places do not assemble to deposit machine oil.
Described labyrinth path 20 is arranged on the upper right corner at lid 10 back sides, is positioned on the lid 10 to offer through hole 30 on the sidewall at labyrinth path 20 places and be communicated with the top of labyrinth path 20.Labyrinth path 20 is arranged on the upper right corner at lid 10 back sides, can makes things convenient for the layout of its outlet and the connecting pipeline of deaerator like this.
The structure that provides among Fig. 1 is not provided with cover plate 22; The structure that provides among Fig. 4 is provided with cover plate 22.
Shown in Fig. 1,2,4,6,7, described through hole 30 places are connected with a pipe joint 31, this pipe joint 31 links to each other with deaerator by flexible pipe, the structure that provides among Fig. 1,2 is the schematic representation that does not also have mounting pipe joint 31, and what provide among Fig. 4,6,7 is the schematic representation of mounting pipe joint 31.
Like this, the fuel-air mixture that crankcase overflows is entered by the ingress of labyrinth path 20 lower ends, after the dividing plate 21 in the mixed gas impact labyrinth path 20, machine oil is realized preliminary separating with residual gas, then, fuel-air mixture through initial gross separation is discharged through the through hole 30 on top, enters deaerator by flexible pipe then and realizes further separating.
In addition, valve mechanism still exists machine oil to splash under the operating mode of high speed, high load, can not eliminate, and still, owing to adopt labyrinth provided by the invention path 20, needs this moment the fuel-air mixture of separation without herein, also just can not produce and not scurry oily phenomenon.
Claims (7)
1. timing sprocket shroud with crankcase ventilation labyrinth, it is characterized in that: on the top at timing chain wheel cap body (10) back side labyrinth path (20) that one staggered crankcase ventilation is used is set, the top of labyrinth path (20) is provided with a through hole (30) and is used for linking to each other with the flexible pipe of deaerator.
2. the timing sprocket shroud of band crankcase ventilation labyrinth according to claim 1, it is characterized in that: described labyrinth path (20) comprises the dividing plate (21) that is arranged on lid (10) back side, dividing plate (21) shape of reporting to the leadship after accomplishing a task is at interval arranged from bottom to top, dividing plate (21) is provided with cover plate (22), and the circuitous shape zone that surrounds between lid (10), dividing plate (21) and the cover plate (22) constitutes labyrinth path (20).
3. the timing sprocket shroud of band crankcase ventilation labyrinth according to claim 1 and 2, it is characterized in that: described labyrinth path (20) comprises and is arranged on lid (10) and the plate face coaming plate (23) parallel with a side sidewall (11), and the last end coaming (24) between connection coaming plate (23) and the sidewall (11), dividing plate (21) is arranged in the groove shape zone of coaming plate (23), (24) and a side sidewall (11) formation.
4. the timing sprocket shroud of band crankcase ventilation labyrinth according to claim 1 and 2, it is characterized in that: described dividing plate (21), coaming plate (23) are perpendicular to lid (10) end face, the height of described dividing plate (21), coaming plate (23), (24) is identical, and the height of described cover plate (22) is lower than the end face that combines with cylinder body on the lid (10).
5. the timing sprocket shroud of band crankcase ventilation labyrinth according to claim 1 and 2 is characterized in that: the end that described dividing plate (21) is positioned at the path middle part is lower than the height that it is positioned at position, path both sides.
6. the timing sprocket shroud of band crankcase ventilation labyrinth according to claim 1 and 2, it is characterized in that: described labyrinth path (20) is arranged on the upper right corner at lid (10) back side, is positioned on the lid (10) to offer through hole (30) on the sidewall that labyrinth path (20) locates and be communicated with the top of labyrinth path (20).
7. the timing sprocket shroud of band crankcase ventilation labyrinth according to claim 6 is characterized in that: described through hole (30) locates to be connected with a pipe joint (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100303273A CN101131133A (en) | 2007-09-20 | 2007-09-20 | Sprocket wheel shroud with crankcase ventilation labyrinth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100303273A CN101131133A (en) | 2007-09-20 | 2007-09-20 | Sprocket wheel shroud with crankcase ventilation labyrinth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101131133A true CN101131133A (en) | 2008-02-27 |
Family
ID=39128507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100303273A Pending CN101131133A (en) | 2007-09-20 | 2007-09-20 | Sprocket wheel shroud with crankcase ventilation labyrinth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101131133A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852114A (en) * | 2010-03-31 | 2010-10-06 | 重庆长安汽车股份有限公司 | Oil-gas separator for ventilation system of crank case of internal combustion engine |
| CN101984224A (en) * | 2010-11-11 | 2011-03-09 | 东风朝阳柴油机有限责任公司 | Labyrinth type oil-gas pre-separating system |
| CN101498234B (en) * | 2009-03-09 | 2011-03-16 | 盐城兴动机械有限公司 | Crankshaft case respiration apparatus of internal-combustion engine |
| CN102733990A (en) * | 2012-06-30 | 2012-10-17 | 长城汽车股份有限公司 | Timing cover lid of engine |
| WO2015085854A1 (en) * | 2013-12-11 | 2015-06-18 | 苏州科瓴精密机械科技有限公司 | Four-stroke engine |
| CN106438097A (en) * | 2016-10-27 | 2017-02-22 | 奇瑞汽车股份有限公司 | Engine timing cover cap structure and installing method thereof |
| JP2018193944A (en) * | 2017-05-19 | 2018-12-06 | スズキ株式会社 | Blow-by gas treatment device for internal combustion engine |
-
2007
- 2007-09-20 CN CNA2007100303273A patent/CN101131133A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101498234B (en) * | 2009-03-09 | 2011-03-16 | 盐城兴动机械有限公司 | Crankshaft case respiration apparatus of internal-combustion engine |
| CN101852114A (en) * | 2010-03-31 | 2010-10-06 | 重庆长安汽车股份有限公司 | Oil-gas separator for ventilation system of crank case of internal combustion engine |
| CN101984224A (en) * | 2010-11-11 | 2011-03-09 | 东风朝阳柴油机有限责任公司 | Labyrinth type oil-gas pre-separating system |
| CN102733990A (en) * | 2012-06-30 | 2012-10-17 | 长城汽车股份有限公司 | Timing cover lid of engine |
| CN102733990B (en) * | 2012-06-30 | 2014-06-25 | 长城汽车股份有限公司 | Timing cover lid of engine |
| WO2015085854A1 (en) * | 2013-12-11 | 2015-06-18 | 苏州科瓴精密机械科技有限公司 | Four-stroke engine |
| CN106438097A (en) * | 2016-10-27 | 2017-02-22 | 奇瑞汽车股份有限公司 | Engine timing cover cap structure and installing method thereof |
| JP2018193944A (en) * | 2017-05-19 | 2018-12-06 | スズキ株式会社 | Blow-by gas treatment device for internal combustion engine |
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Application publication date: 20080227 |