CN204060857U - Motor cylinder protective shield and crankcase ventilation system - Google Patents
Motor cylinder protective shield and crankcase ventilation system Download PDFInfo
- Publication number
- CN204060857U CN204060857U CN201420436942.XU CN201420436942U CN204060857U CN 204060857 U CN204060857 U CN 204060857U CN 201420436942 U CN201420436942 U CN 201420436942U CN 204060857 U CN204060857 U CN 204060857U
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- CN
- China
- Prior art keywords
- extension part
- deaerator
- nest seat
- motor cylinder
- guard shield
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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.)
- Withdrawn - After Issue
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- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The utility model provides a kind of motor cylinder protective shield, comprise guard shield body and cover plate, described cover plate is arranged on the inside of described guard shield body, and gap-forming oil gas pre-separation space between described cover plate and described guard shield body, described oil gas pre-separation space has the first suction port be communicated with crankcase, in described oil gas pre-separation space, be provided with stacked oil baffle, described oil baffle to have from starting point upwards and the first extension part extended back, start upwards and the second extension part extended towards described starting point direction at the end of described first extension part, start downwards and the 3rd extension part extended back with the end at described first extension part.The utility model additionally provides the crankcase ventilation system adopting above-mentioned motor cylinder protective shield.The utility model has the beneficial effect that oil gas pre-separation is effective, avoid low temperature to have a negative impact to gas flow.
Description
Technical field
The utility model relates to automotive engine applications, is specifically related to motor cylinder protective shield and crankcase ventilation system.
Background technique
Motor, particularly diesel engine, certain gap is had between piston and cylinder, be called cylinder prepareding gap, this gap can cause cylinder interior gas constantly to drain in crankcase, and crankcase pressure then increases gradually, and motor then needs crankcase ventilation system and helps crankcase Exhaust Gas, reduce pressure, the oil droplet simultaneously in filtering gas.Current, the crankcase ventilation system of motor is mostly external oil-gas separator formula, and this type of deaerator is fixed on manifold or cylinder cap by support, and deaerator is connected with cylinder cap guard shield, oil sump by flexible pipe.This type of arranges that flexible pipe is more, and in the winter time, the water vapour in flexible pipe easily freezes, and affects gas flow.
In addition, occurred in prior art arranging oil gas preseparating structure (such as throttle orifice and dividing plate) in cylinder cap guard shield inside, before crank case gases enters deaerator, carry out oil gas pre-separation, but separating effect has been unsatisfactory.
Model utility content
First object of the present utility model is to provide a kind of motor cylinder protective shield of pre-separation better effects if, and embodiment of the present utility model provides following technological scheme for this reason:
A kind of motor cylinder protective shield, comprise guard shield body and cover plate, described cover plate is arranged on the inside of described guard shield body, and gap-forming oil gas pre-separation space between described cover plate and described guard shield body, described oil gas pre-separation space has the first suction port be communicated with crankcase, in described oil gas pre-separation space, be provided with stacked oil baffle, described oil baffle to have from starting point upwards and the first extension part extended back, start upwards and the second extension part extended towards described starting point direction at the end of described first extension part, start downwards and the 3rd extension part extended back with the end at described first extension part.
Preferably, described oil baffle also has the 4th extension part, described 4th extension part from the end of described 3rd extension part downwards and extend towards starting point direction.
Preferably, the top of described second extension part of lower floor's oil baffle is higher than the bottom of the 4th extension part of upper strata oil baffle.
Preferably, the starting point of described first extension part is cydariform.
Preferably, in described oil gas pre-separation space, be also provided with interlaced dividing plate, or be also provided with restricting orifice.
Preferably, also one-body molded on described guard shield body have deaerator nest seat, and described oil gas pre-separation space has the second suction port being directly communicated with described deaerator nest seat.
Another object of the present utility model is to provide the more succinct crankcase ventilation system of a kind of gas flow path, thus the adverse effect that reduction outside air temperature flows to crank case gases, embodiment of the present utility model provides following technological scheme for this reason:
A kind of crankcase ventilation system, comprise motor cylinder protective shield as above and deaerator, described deaerator is installed in described deaerator nest seat.
Preferably, described deaerator nest seat protrudes to the exterior section of described guard shield body, and described second suction port is arranged on the sidewall of described deaerator nest seat, there is gap between described deaerator nest seat and the shell of described deaerator.
Preferably, the diapire of described deaerator nest seat is provided with the one-way valve leading to engine interior.
Preferably, the suction port of described deaerator is arranged on the bottom of described deaerator.
In cylinder cap guard shield of the present utility model, owing to being provided with special formed stacked oil baffle in oil gas pre-separation space, make crank case gases after entering the oil gas pre-separation space of cylinder cap guard shield, flow through and become curve, and after the first extension part flowing, run into the stop of the second extension part, larger oil droplet can accumulate, fall on cover plate, is then back to engine interior, thus improves oil gas pre-separation effect.
Further, gas is after the 3rd extension part flowing, and encounter the stop of the 4th extension part of upper strata oil baffle, larger oil droplet can accumulate, fall on cover plate, is then back to engine interior, thus improves oil gas pre-separation effect.
Further, lower floor second extension part top is higher than the height of extension part bottom, upper strata the 4th, make all gas of the passage flowed through between two-layer oil baffle, or be subject to the stop of the second extension part and carry out Oil-gas Separation, or be subject to the stop of the 4th extension part and carry out Oil-gas Separation, improving oil gas pre-separation effect.
Further, the starting point of the first extension part is expanded to cydariform, can not only reduce the noise in gas flow, and after gas runs into the second extension part stop portions backflow, drum-like shaped can also stop reflux gas, ensures that larger oil droplet fully accumulates.
Further, staggered dividing plate and restricting orifice can carry out oil gas pre-separation further.
Further, because oil gas pre-separation space is directly communicated with deaerator nest seat by the second suction port, and deaerator is installed in deaerator nest seat, therefore cylinder cap guard shield is connected with no longer needing flexible pipe between deaerator, solves flexible pipe water vapour ice formation issues.
In crankcase ventilation system of the present utility model, improve oil gas pre-separation efficiency owing to have employed cylinder cap guard shield as above, and deaerator is positioned at deaerator nest seat, reduces the probability that water vapour freezes.
Further, in crankcase ventilation system of the present utility model, gas directly enters deaerator nest seat after oil gas pre-separation, utilize the gap between deaerator nest seat and the shell of deaerator, at the outer convex position of deaerator nest seat, during winter, little oil droplet remaining in gas easily liquefies at low temperatures, sidewall under gravity along deaerator nest seat flows to diapire, and be higher than fluid due to the freezing point of water vapour, therefore water vapour can condense in the sidewall of deaerator nest seat, in other words, gap between deaerator nest seat and deaerator shell utilizes low temperature to achieve further oil gas pre-separation result, and compared with flexible pipe, obviously simpler to the deicing of deaerator nest seat inwall, and because the diameter of deaerator nest seat will much larger than commonly used hose, therefore freeze and hinder little to gas circulation.
Further, bottom is located at by the suction port of deaerator, and sidewall is located at by the second suction port of deaerator nest seat, and gas flow path and time in deaerator nest seat are lengthened, and is beneficial to oil gas pre-separation.
Accompanying drawing explanation
Next will be described in further detail specific embodiment of the utility model by reference to the accompanying drawings, wherein:
Fig. 1 is the explosive view of the crankcase ventilation system of embodiment of the present utility model;
Fig. 2 is the bottom view of the motor cylinder protective shield of embodiment of the present utility model;
Fig. 3 is the stereogram along carrying out the motor cylinder protective shield rotated after the A-A line in Fig. 2 is cut open;
Fig. 4 is the stereogram of the guard shield body of embodiment of the present utility model;
Fig. 5 is the stereogram of another angle of the guard shield body of embodiment of the present utility model;
Fig. 6 is the stereogram of the cover plate of embodiment of the present utility model;
Fig. 7 is the bottom view of the oil baffle of embodiment of the present utility model.
Description of symbols in upper figure: air-strainer 100, shell 110, steam outlet pipe 120, guard shield body 200, deaerator nest seat 210, the sidewall 211 of deaerator nest seat, the diapire 212 of deaerator nest seat, one-way valve 213, second suction port 214, first suction port 220, the diapire 230 of guard shield body, the sidewall 240 of guard shield body, oil gas pre-separation space 250, baffle plate 260, starting point 261, first extension part 262, middle-end 263, second extension part 264, 3rd extension part 265, end 266, 4th extension part 267, dividing plate 270, return opening 310, restricting orifice 320, throttle orifice 321.
Embodiment
With reference to figure 1, the crankcase ventilation system in the present embodiment mainly comprises deaerator 100, guard shield body 200 and cover plate 300 3 part.Wherein guard shield body 200 fasten to cover plate 300 together with form motor cylinder protective shield, the concrete internal structure of motor cylinder protective shield will be described below.One-body molded on guard shield body 200 have deaerator nest seat 210, deaerator 100 is installed in deaerator nest seat 210, that is, the shell 110 of deaerator 100 is partly or completely positioned at deaerator nest seat 210 inside, and steam outlet pipe 120 is exposed to outside.
In ensuing description, in towards the side of engine cylinder cover, cylinder body being, with deviate from engine cylinder cover, cylinder body side for outward.
With reference to figure 4, except deaerator nest seat 210, guard shield body 200 also has guard shield body diapire 230 and the guard shield body sidewall 240 around guard shield body diapire 230, thus forms the inner space be buckled in above cylinder cap.
Composition graphs 2, Fig. 3, Fig. 4, cover plate 300 is arranged on the inside of guard shield body 200, more high-visible from Fig. 3, interval between the diapire 230 of cover plate 300 and guard shield body 200, thus form the oil gas pre-separation space 250 of relative closure as shown in Figure 4, and oil gas pre-separation space 250 is the space of a relative closure, only at the first suction port 220, second suction port 214, return opening 310 place and oil gas pre-separation space 250 ft connection.Composition graphs 2 and Fig. 3, the high order end position of cover plate 300 shown in fig. 2 as seen, between guard shield body 200 and cover plate 300, reserved first suction port 220, makes oil gas pre-separation space 250 be communicated with crankcase.As seen from Figure 4, in oil gas pre-separation space 250, be provided with stacked oil baffle 260, interlaced dividing plate 270, and composition graphs 6 is visible, after cover plate 300 fastens to guard shield body 200 inside, the restricting orifice 320 on cover plate 300 also can extend in oil gas pre-separation space 250.
With reference to figure 7, in this figure, particularly illustrate the structure that multilayer oil baffle 260 is stacked.In the description that composition graphs 7 carries out, easy and clear in order to what describe, "up" and "down" only refers to direction as shown, does not represent the "up" and "down" in the assembly direction of motor, meanwhile, be vertical direction to point to the direction of end 266 from starting point 261.Gas in engine crankcase enters oil gas pre-separation space 250 by the first suction port 220, then enters the gas passageway between each layer oil baffle 260.Each oil baffle 260 all has the first extension part 262, second extension part 264, the 3rd extension part 265 and the 4th extension part 267.Wherein, from the starting point 261 of oil baffle 260 upwards and extend back, the first extension part 262 ends at the middle-end 263 of oil baffle 260 to the first extension part 262, and that is, middle-end 263 is also the end of the first extension part 262 simultaneously.Second extension part 264 starts upwards at the end (i.e. the middle-end 263 of oil baffle 260) of the first extension part 262 and extends towards starting point 261 direction.3rd extension part 265 starts downwards at the end (i.e. the middle-end 263 of oil baffle 260) of the first extension part 262 and continues to extend back, and the 3rd extension part ends at the end 266 of oil baffle 260.Like this, see on the whole, the first extension part 262, second extension part 264 and the 3rd extension part 265 define roughly " entering " word shape.Oil baffle 260 also has the 4th extension part the 267, four extension part 267 from the end (i.e. the end 266 of oil baffle 260) of the 3rd extension part 265 downwards and extend towards starting point 261 direction.The starting point 261 of oil baffle 260 expands and forms drum-like shaped, makes the upper and lower end face of starting point 261 all more than the upper and lower surface of the first extension part 262.Crank case gases enters the gas passageway process between each layer oil baffle 260 from the first suction port 220, and first gas run into starting point 261, is shunted at this gas, and reduces pneumatic noise due to cydariform effect.Subsequently, gas flows along direction shown in the band arrow solid line in figure, flow direction starts to become curve, gas is stopped after running into the second extension part 264, on the separated surface being attached to the first extension part 262 and the second extension part 264 of larger oil droplet, then drop onto under gravity on cover plate 300, then flow back into engine interior from refluxing opening 310.Meanwhile, because gas and the second extension part 264 collision can cause a part of gas backstreaming, as shown in the band arrow dotted line in figure, this portion gas can run into the stop of the starting point 261 of cydariform, makes larger oil droplet fully assemble and drop.After the second extension part 264, gas continues along the channel flow up and down between two-layer 3rd extension part 265, after running into the stop of the 4th extension part 267 of upper strata oil baffle 260, oil droplet in gas is continued to be separated, be gathered in the surface of the 3rd extension part 265 and the 4th extension part 267, then fall on cover plate 300 under gravity.As seen from the figure, with represented by dotted arrows horizontal line, then the top of the second extension part 264 of lower floor's oil baffle 260 is higher than the bottom of the 4th extension part 267 of upper strata oil baffle 260, like this, flow through all gas of the passage between two-layer oil baffle 260, or be subject to the stop of the second extension part 264 and carry out Oil-gas Separation, or be subject to the stop of the 4th extension part 267 and carry out Oil-gas Separation, substantially the larger oil droplet in all gas all can be separated, thus improves oil gas pre-separation effect.
Although in the foregoing description to " on ", the concept of D score carried out specific explanations, particularly, oil baffle 260 is attached on diapire 230, but those skilled in the art should imagine, stacked oil baffle 260 can also be attached on sidewall 240, namely now in oil baffle 260 structure " on ", D score direction is consistent with the assembly direction of cylinder block, cylinder head, cylinder cap guard shield, this still belongs to the category of the "up" and "down" in claim.But when oil baffle 260 is attached on sidewall 240, the oil droplet that upper strata oil baffle 260 is assembled to drop on lower floor's oil baffle 260 but not to drop on cover plate 300, thus causes the gas channel trapped fuel between oil baffle 260, is therefore not preferred.
Composition graphs 4 and Fig. 6, gas, after leaving stacked oil baffle 260, continues to flow over staggered dividing plate 270 and restricting orifice 320, carries out further oil gas pre-separation at dividing plate 270 place and throttle orifice 321 place.Subsequently, the gas in oil gas pre-separation space 250 directly enters oil gas pre-separation nest seat 210 by the second suction port 214.As seen from Figure 4, deaerator nest seat 210 part is convex in guard shield body interior, the convex outside to guard shield body of part.On deaerator nest seat diapire 212, be provided with one-way valve 213, one-way valve 213 only allows the direction of flow engine interior in deaerator nest seat 210, and does not allow flowing in the other direction.
With reference to figure 5, visible second suction port 214 is arranged on deaerator nest seat sidewall 211.
Composition graphs 1 and Fig. 5, deaerator 100 is installed to after in deaerator nest seat 210, there is gap between the sidewall 211 of deaerator shell 110 and deaerator nest seat, namely the internal diameter of deaerator nest seat 210 is greater than the external diameter of deaerator shell 110.Further, the suction port of preferred oil gas separating device 100 is positioned at bottom it.Like this, in the crankcase ventilation system of the present embodiment, crank case gases is after a series of oil gas pre-separations in oil gas pre-separation space 250, directly enter in deaerator nest seat 210 from the second suction port 214, and flow in gap between deaerator nest seat 210 and deaerator 100.First, no longer need flexible pipe to be connected between deaerator 100 with guard shield body 200, avoid freezing in flexible pipe; Secondly, during winter, rely on the cold service of deaerator nest seat 210 projection, the gas temperature flowed in gap between deaerator nest seat 210 and deaerator 100 is lowered, little oil droplet remaining in gas easily liquefies at low temperatures, sidewall 211 under gravity along deaerator nest seat 210 flows to diapire 212, and is back to engine interior via one-way valve 213.And be higher than fluid due to the freezing point of water vapour, therefore water vapour can condense on the sidewall 211 of deaerator nest seat 210, in other words, gap between deaerator nest seat 210 and deaerator shell 110 utilizes low temperature achieve further oil gas pre-separation and remove water vapour effect, and compared with flexible pipe, obviously simpler to the deicing of deaerator nest seat 210 inwall, and because the diameter of deaerator nest seat 210 much larger than commonly used hose, therefore will freeze and hinder little to gas circulation.That is, the utility model utilizes low temperature to create oil gas separation while avoiding the adverse effect that low temperature brings.And the suction port of deaerator 100 is arranged on the bottom of deaerator 100, like this, gas is from after the second suction port 214 sidewall 211 of deaerator nest seat enters, in deaerator nest seat 210, flow path and time are lengthened out, and then it is inner to enter deaerator 100, it is more abundant that this is beneficial to oil gas pre-separation.
Although the utility model is described in conjunction with above embodiment, but the utility model is not defined to above-described embodiment, those of ordinary skill in the art can easily modify to it and change, but do not leave essential idea of the present utility model and scope.
Claims (10)
1. a motor cylinder protective shield, comprise guard shield body and cover plate, described cover plate is arranged on the inside of described guard shield body, and gap-forming oil gas pre-separation space between described cover plate and described guard shield body, described oil gas pre-separation space has the first suction port be communicated with crankcase, it is characterized in that, in described oil gas pre-separation space, be provided with stacked oil baffle, described oil baffle to have from starting point upwards and the first extension part extended back, start upwards and the second extension part extended towards described starting point direction at the end of described first extension part, start downwards and the 3rd extension part extended back with the end at described first extension part.
2. motor cylinder protective shield according to claim 1, is characterized in that, described oil baffle also has the 4th extension part, described 4th extension part from the end of described 3rd extension part downwards and extend towards starting point direction.
3. motor cylinder protective shield according to claim 2, is characterized in that, the top of described second extension part of lower floor's oil baffle is higher than the bottom of the 4th extension part of upper strata oil baffle.
4. motor cylinder protective shield according to claim 1, is characterized in that, the starting point of described first extension part is cydariform.
5. motor cylinder protective shield according to claim 1, is characterized in that, in described oil gas pre-separation space, is also provided with interlaced dividing plate, or is also provided with restricting orifice.
6. the motor cylinder protective shield according to any one in claim 1 to 5, it is characterized in that, also one-body molded on described guard shield body have deaerator nest seat, and described oil gas pre-separation space has the second suction port being directly communicated with described deaerator nest seat.
7. a crankcase ventilation system, is characterized in that, comprises motor cylinder protective shield as claimed in claim 6 and deaerator, and described deaerator is installed in described deaerator nest seat.
8. crankcase ventilation system according to claim 7, it is characterized in that, described deaerator nest seat protrudes to the exterior section of described guard shield body, described second suction port is arranged on the sidewall of described deaerator nest seat, there is gap between described deaerator nest seat and the shell of described deaerator.
9. crankcase ventilation system according to claim 8, is characterized in that, the diapire of described deaerator nest seat is provided with the one-way valve leading to engine interior.
10. crankcase ventilation system according to claim 8, is characterized in that, the suction port of described deaerator is arranged on the bottom of described deaerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420436942.XU CN204060857U (en) | 2014-08-04 | 2014-08-04 | Motor cylinder protective shield and crankcase ventilation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420436942.XU CN204060857U (en) | 2014-08-04 | 2014-08-04 | Motor cylinder protective shield and crankcase ventilation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204060857U true CN204060857U (en) | 2014-12-31 |
Family
ID=52202392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420436942.XU Withdrawn - After Issue CN204060857U (en) | 2014-08-04 | 2014-08-04 | Motor cylinder protective shield and crankcase ventilation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204060857U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100332A (en) * | 2014-08-04 | 2014-10-15 | 安徽江淮汽车股份有限公司 | Engine cylinder cover shield and crankcase ventilation system |
| CN105003349A (en) * | 2015-08-12 | 2015-10-28 | 安徽江淮汽车股份有限公司 | Engine cylinder head protection cover integrated with oil-gas separation structure |
| CN105065132A (en) * | 2015-08-12 | 2015-11-18 | 安徽江淮汽车股份有限公司 | Improved structure of engine cylinder head shield integrated with oil-gas separation structure |
| CN106703936A (en) * | 2015-11-12 | 2017-05-24 | 北汽福田汽车股份有限公司 | Engine oil and gas separator and engine assembly |
| CN108825329A (en) * | 2018-08-10 | 2018-11-16 | 安徽凤凰滤清器股份有限公司 | Crankcase oils gas separating device and engine system |
-
2014
- 2014-08-04 CN CN201420436942.XU patent/CN204060857U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100332A (en) * | 2014-08-04 | 2014-10-15 | 安徽江淮汽车股份有限公司 | Engine cylinder cover shield and crankcase ventilation system |
| CN105003349A (en) * | 2015-08-12 | 2015-10-28 | 安徽江淮汽车股份有限公司 | Engine cylinder head protection cover integrated with oil-gas separation structure |
| CN105065132A (en) * | 2015-08-12 | 2015-11-18 | 安徽江淮汽车股份有限公司 | Improved structure of engine cylinder head shield integrated with oil-gas separation structure |
| CN105065132B (en) * | 2015-08-12 | 2017-11-03 | 安徽江淮汽车集团股份有限公司 | A kind of improved structure for the motor cylinder protective shield for being integrated with gas oil separation structure |
| CN106703936A (en) * | 2015-11-12 | 2017-05-24 | 北汽福田汽车股份有限公司 | Engine oil and gas separator and engine assembly |
| CN108825329A (en) * | 2018-08-10 | 2018-11-16 | 安徽凤凰滤清器股份有限公司 | Crankcase oils gas separating device and engine system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141231 Effective date of abandoning: 20160511 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |