CN201125795Y - Cylinder of diesel engine - Google Patents
Cylinder of diesel engine Download PDFInfo
- Publication number
- CN201125795Y CN201125795Y CNU2007201849957U CN200720184995U CN201125795Y CN 201125795 Y CN201125795 Y CN 201125795Y CN U2007201849957 U CNU2007201849957 U CN U2007201849957U CN 200720184995 U CN200720184995 U CN 200720184995U CN 201125795 Y CN201125795 Y CN 201125795Y
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- CN
- China
- Prior art keywords
- cylinder
- passage
- cylinder block
- mounting hole
- cylinder body
- Prior art date
- 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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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The utility model relates to a diesel engine cylinder body having a cylinder body, wherein a plurality of ventilation and oil back channels used for the oil back and the crankcase ventilation in the cylinder body are arranged on the axis of the cylinder cap bolt mounting hole, and the outer bump at the cylinder cap bolt hole is arranged at the height of the lower part of the cylinder hole in the channel, and extends downwards to the height larger than the cylinder cap bolt mounting hole, wherein the upper end is in the platform structure. The utility model has adequate joining strength, which makes the sealing between the cylinder cap and the cylinder body excellent, reduces the failure rate, further ensuing the service dependability and the dynamic performance of the engine, thereby avoiding the deep counterboring processing of the cylinder cap bolt mounting hole on the cylinder body, reducing the processing load of the cylinder body, simplifying the manufacturing engineering, reducing the manufacture cost of the engine.
Description
Technical field
The utility model relates to a kind of diesel engine, particularly a kind of cylinder of diesel engine.It is the cylinder block of diesel engine first-selection.
Background technique
Motor is the heart of automobile.Cylinder block is the important component part of motor, is used for the supporting engine crankshaft ﹠ connecting, connects cylinder head, connects the also annex of supporting engine.Simultaneously, in cylinder block, be provided with the passage that is used for oil return and crankcase ventilation.This communicates with the valve cage of cylinder head above passage, communicates with the crankcase and the oil sump of motor below.The purpose of this passage has: one, the unnecessary machine oil owing to the lubricated generation of valve mechanism can flow back in the oil sump of motor along this passage in the cylinder head valve cage, and prevent that machine oil from remaining in cylinder head inside, thereby guarantee the proper functioning of engine oil pump; Two, in the pistons work, the waste gas that the gap by piston and cylinder wall is leaked in the crankcase can be up to cylinder head top from this passage, through being arranged in the deaerator of valve cover cap and the gas handling system that crankcase bleed pipe is discharged to motor.
The structure that is used for the passage of oil return and crankcase ventilation on traditional cylinder block is: in the side of cylinder block, one or more special passages that are used for oil return and crankcase ventilation are set, this channeling is single, only satisfies the requirement of above-mentioned functions.
The traditional cylinder block and the connecting mode of cylinder head are: use cylinder head bolt, by being arranged in firing chamber and cylinder-bore cylinder head construction bolt hole on every side, cylinder head is fixed on the cylinder block.
On cylinder block, be used for the tapped hole that cylinder head bolt is installed, there is the arrangement of two kinds of hole sites:, use short cylinder head bolt one, with the top of screw hole arrangement in cylinder block.The shortcoming of this scheme is: because the pulling force after the cylinder head bolt installation is bigger, the discontinuity on the top of cylinder block, be easy to generate bigger stress deformation, make the planeness of the cylinder block upper surface after assembling reduce, thereby it is inhomogeneous to compressing of head gasket, cause the sealing of head gasket bad, also therefore cause the situation of burning the cylinder pad to happen occasionally; Exert an adverse impact for simultaneously the cylindricity of cylinder-bore, and then make engine power performance and reliability produce negative influence.Two, with the middle part of screw hole arrangement in cylinder block, long cylinder head bolt is used in the position of cylinder-bore bottom.Though this mode can solve the problem of first kind of stress deformation aspect in the scheme, but need be on cylinder block, the position of cylinder head construction bolt, process the counterbore of very dark tapped hole, then increase the workload of cylinder block processing, make the manufacturing process relative complex of cylinder block, manufacture cost is higher.
The model utility content
The utility model provides a kind of new block structure at above-mentioned problems of the prior art.A plurality of passages that are used for oil return and crankcase ventilation in the cylinder block are located at the position of cylinder cap construction bolt.This passage had both had the backflow of cylinder head valve cage machine oil and the function that crankcase waste gas passes through, and can overcome the drawback that exists in the prior art cheaply again simultaneously.Simplify manufacturing process, reduced rate of fault, reduced manufacture cost, guaranteed the reliability and the power performance of engine operation.
The purpose of this utility model realizes by the following technical solutions:
Form by cylinder block, with a plurality of ventilation and drainback passages that are used for oil return and crankcase ventilation in the cylinder block, be arranged on the axial location in cylinder cap construction bolt hole, the position of the height place cylinder bolt hole of the inherent cylinder-bore of passage bottom is provided with projection laterally, and extending downward the degree of depth that tapped hole is installed greater than cylinder bolt, the upper end is the structure of platform-like.
Described ventilation and drainback passage in cylinder-bore height section along the axial direction setting in cylinder cap construction bolt hole, and in the height section of crankcase along the crankcase external surface, form special-shaped passage, thereby form cavity through the cylinder block height.
The passage bore of described ventilation and drainback passage is greater than the diameter of cylinder cap construction bolt.
The utility model has the advantages of as follows:
The utility model compared with prior art, when having realized being used for the channel function of oil return and crankcase ventilation on the cylinder block, cylinder head bolt is inserted the passage of this casting, connect with the tapped hole at place, cylinder-bore bottom, have enough linking intensities, make good airproof performance between cylinder cap and cylinder body, reduce rate of fault, and then guaranteed the reliability and the power performance of engine operation.Avoided the cylinder block upper cylinder bonnet bolt processing with the very dark counterbore in tapped hole place is installed, the workload of the cylinder block processing that has then reduced makes the manufacturing process of cylinder block simple relatively, has reduced the manufacture cost of motor.
Description of drawings
Fig. 1 is a plan structure schematic representation of the present utility model.
Fig. 2 is the A-A sectional structure schematic representation of Fig. 1.
Among the figure, 1. ventilate and drainback passage, 2. cylinder bolt mounting hole, 3. cylinder block.
Embodiment
Embodiment
Content of the present utility model is described in detail in conjunction with the accompanying drawings by embodiment.Shown in Figure 1 is plan structure schematic representation of the present utility model.Through machine shaping, the bilateral symmetry of the upper surface of cylinder block 3 between adjacent cylinder hole is provided with ventilates and the road junction of drainback passage 1, also is the insertion mouth of cylinder cap construction bolt, and uniform vertically by precision casting for cylinder block 3.Be subjected to the restriction of cylinder block front portion structure, the counterbore of cylinder bolt mounting hole that is positioned at the cylinder block front end is still for shaping.Shown in Figure 2 is the shape that height and ventilation and drainback passage 1 are set of cylinder bolt mounting hole 2 and moves towards schematic representation.Cylinder block 3 is in ventilation and drainback passage 1, height place in the cylinder-bore bottom in the position of cylinder bolt hole setting projection laterally, and extends downward the hole depth that screw 2 is installed greater than cylinder bolt, the upper end is the platform-like structure, in order to satisfying the requirement that connects.Described ventilation and drainback passage 1 are provided with along cylinder cap construction bolt axial direction in the cylinder-bore section, and in the height section of cylinder block crankshaft case along the crankcase external surface, form different in nature passage, thereby form cavity through the cylinder block height.
Claims (3)
1. cylinder of diesel engine, form by cylinder block (3), it is characterized in that a plurality of ventilation and drainback passages (1) that are used for oil return and crankcase ventilation in the cylinder block (3), be arranged on the axial location of cylinder bolt mounting hole (2), the height place of the cylinder-bore bottom of the inherent cylinder block of passage (3), in the position of cylinder bolt mounting hole (2) setting projection laterally, and extend downward the degree of depth that screw (2) is installed greater than cylinder bolt, the upper end is the structure of platform-like.
2, cylinder of diesel engine according to claim 1, it is characterized in that described ventilation and drainback passage (1) axial direction setting in cylinder-bore height section along cylinder bolt mounting hole (2), and in the height section of crankcase along the crankcase external surface, form special-shaped passage, thereby form cavity through the cylinder block height.
3, cylinder of diesel engine according to claim 1 is characterized in that the diameter of the passage bore of described ventilation and drainback passage (1) greater than the cylinder cap construction bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201849957U CN201125795Y (en) | 2007-12-20 | 2007-12-20 | Cylinder of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201849957U CN201125795Y (en) | 2007-12-20 | 2007-12-20 | Cylinder of diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201125795Y true CN201125795Y (en) | 2008-10-01 |
Family
ID=39999266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201849957U Expired - Lifetime CN201125795Y (en) | 2007-12-20 | 2007-12-20 | Cylinder of diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201125795Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061850A (en) * | 2012-12-26 | 2013-04-24 | 重庆长安汽车股份有限公司 | Crankcase ventilation oil returning structure |
| CN106762188A (en) * | 2015-11-24 | 2017-05-31 | 上海汽车集团股份有限公司 | Vehicle and its engine, cylinder block |
| CN111963328A (en) * | 2020-08-27 | 2020-11-20 | 东风汽车集团有限公司 | Engine cylinder body oil return pipeline structure |
| CN114370350A (en) * | 2022-01-04 | 2022-04-19 | 第一拖拉机股份有限公司 | Non-road diesel engine cylinder cover with bilateral ventilation oil return channels |
-
2007
- 2007-12-20 CN CNU2007201849957U patent/CN201125795Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061850A (en) * | 2012-12-26 | 2013-04-24 | 重庆长安汽车股份有限公司 | Crankcase ventilation oil returning structure |
| CN106762188A (en) * | 2015-11-24 | 2017-05-31 | 上海汽车集团股份有限公司 | Vehicle and its engine, cylinder block |
| CN111963328A (en) * | 2020-08-27 | 2020-11-20 | 东风汽车集团有限公司 | Engine cylinder body oil return pipeline structure |
| CN114370350A (en) * | 2022-01-04 | 2022-04-19 | 第一拖拉机股份有限公司 | Non-road diesel engine cylinder cover with bilateral ventilation oil return channels |
| CN114370350B (en) * | 2022-01-04 | 2022-11-22 | 第一拖拉机股份有限公司 | Non-road diesel engine cylinder cover with double-side ventilation oil return channel |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081001 |