CN202645760U - Internal combustion engine and piston thereof - Google Patents
Internal combustion engine and piston thereof Download PDFInfo
- Publication number
- CN202645760U CN202645760U CN 201220217785 CN201220217785U CN202645760U CN 202645760 U CN202645760 U CN 202645760U CN 201220217785 CN201220217785 CN 201220217785 CN 201220217785 U CN201220217785 U CN 201220217785U CN 202645760 U CN202645760 U CN 202645760U
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- piston
- oil
- exhaust valve
- utility
- combustion engine
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Abstract
The utility model discloses a piston which comprises a piston body. An exhaust valve avoid pit used for avoiding an exhaust valve is arranged at the top of the piston body. The embodiment of the utility model further provides an internal combustion engine which comprises a cylinder and the piston arranged in the cylinder. By means of the internal combustion engine and the piston of the internal combustion engine, when braking is performed inside the cylinder of the engine, the exhaust valve is forced to be opened to exhaust compressed air in the cylinder, the piston is still in an up-moving state, due to the fact that the exhaust valve avoid pit is arranged at the top of the piston body, the exhaust valve does not interfere with the piston, and the 'top collision phenomenon' between the exhaust valve and the piston is effectively avoided.
Description
Technical field
The utility model relates to the apparatus of the internal-combustion engine technical field, particularly a kind of internal-combustion engine and piston thereof.
Background technique
Piston is along the reciprocating mechanical parts of its cylinder body axis in the mechanical devices such as stroke piston combustion engine, compressor and pump.Piston has disc, cylindrical and 3 kinds of forms of cylindrical shape.Internal-combustion engine comprises diesel engine and petrol engine, and its internal piston does work under the promotion of high-temperature high-pressure fuel gas.
Piston is the harshest part of working in the internal-combustion piston engine, day by day raising along with the motor reinforcing degree, the clearance of piston and cylinder head also is tending towards diminishing, for guaranteeing the quality of air in the cylinder, combustion gas as much as possible, generally all there is valve overlap in present motor, in the process that intake valve is opened in advance, the interference situation that intake valve and piston might occur, cause intake valve to fracture, namely " hitting the top phenomenon " of intake valve and piston occurs for avoiding this situation, at present, on the piston top of most of motors all respective design the intake valve hole.
In the internal combustion engine use process, the situation that the engine cylinder inside brake often occurs, owing to need the positive opening exhaust valve, make pressurized gas directly discharge in incombustible situation in the cylinder, and this moment, piston still was in uplink state, the interference of exhaust valve and piston can occur equally, causes the impaired bending of exhaust valve even fractures " hitting the top phenomenon " of generation exhaust valve and piston.
Therefore, how avoiding exhaust valve and piston that " hitting the top phenomenon " occurs, is those skilled in the art's problem demanding prompt solutions.
The model utility content
In view of this, the utility model provides a kind of piston, and this piston is difficult for exhaust valve " hitting the top phenomenon " occuring.The utility model also provides a kind of internal-combustion engine with above-mentioned piston.
For achieving the above object, the utility model provides following technological scheme:
A kind of piston comprises piston only, and the top of described piston only is provided be used to the exhaust valve valve pit of dodging exhaust valve.
Preferably, be provided with on the described piston only be used to the interior oil cooling passage that cools off described piston only.
Preferably, described interior oil cooling passage comprises ring shaped oil passage and the oil-feed oil duct that is communicated with described ring shaped oil passage respectively and the fuel-displaced oil duct that is arranged circumferentially on described piston only.
Preferably, the auxiliary oil channel that also comprises the connecting rod chamber that is communicated with described interior oil cooling passage and described piston.
Preferably, an end of described auxiliary oil channel is connected on the described ring shaped oil passage.
Preferably, described auxiliary oil channel is communicated with the top in described connecting rod chamber.
Preferably, the top diameter of described piston only is less than base diameter.
Preferably, the top of described piston only is provided be used to the intake valve valve pit of dodging intake valve.
Preferably, described piston only is the all-aluminium piston body.
A kind of internal-combustion engine comprises cylinder and is arranged at the interior piston of described cylinder that described piston is each described piston of such scheme.
Can find out from above-mentioned technological scheme, the internal-combustion engine that the utility model provides and piston thereof, when the engine cylinder inside brake, the positive opening exhaust valve is discharged pressurized gas in the cylinder, piston still is in uplink state, because the piston only top is provided with the exhaust valve valve pit, and exhaust valve and piston are not interfered mutually, effectively avoided exhaust valve and piston that " hitting the top phenomenon " occurs.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiments more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The plan view of the piston that Fig. 1 provides for the utility model embodiment;
The interior oil cooling passage schematic representation of the piston that Fig. 2 provides for the utility model embodiment;
The auxiliary oil channel schematic representation of the piston that Fig. 3 provides for the utility model embodiment.
Embodiment
The utility model discloses a kind of internal-combustion engine and piston thereof, to avoid exhaust valve and piston " hitting the top phenomenon ".
Below in conjunction with the accompanying drawing among the utility model embodiment, the technological scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment who obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to Fig. 1, the plan view of the piston that Fig. 1 provides for the utility model embodiment.
The utility model embodiment provides a kind of piston, comprises piston only, and the top of piston only is provided be used to the exhaust valve valve pit 1 of dodging exhaust valve.
The piston that the utility model provides, when the engine cylinder inside brake, the exhaust valve of positive opening cylinder is discharged pressurized gas in the cylinder, piston still is in uplink state, because the piston only top is provided with exhaust valve valve pit 1, exhaust valve and piston are not interfered mutually, effectively avoided the generation of exhaust valve and piston " hitting the top phenomenon ".
Please refer to Fig. 2, the interior oil cooling passage schematic representation of the piston that Fig. 2 provides for the utility model embodiment.
For cooling piston, reduce the high temperature that it produces when operation, in the piston that the utility model embodiment provides, be provided with the interior oil cooling passage 2 for the cooling piston body on the piston only.
As shown in Figure 2, the interior oil cooling passage 2 of the utility model embodiment employing comprises the ring shaped oil passage 21 that is arranged circumferentially on piston only and oil-feed oil duct 22 and the fuel-displaced oil duct 23 that is communicated with described ring shaped oil passage 21 respectively.Consider piston in running, the head temperature of piston only is higher than bottom temp, so ring shaped oil passage 21 is arranged at the position near the top of piston only.Piston is in running, and cold oil enters oil-feed oil duct 22 rear arrival ring shaped oil passages 21, and piston only is cooled off, take away the heat of piston, flow into oil sump by fuel-displaced oil duct 23 again, reach the effect that absorbs near ring shaped oil passage 21 heats, and then reduce the temperature of piston only.
As shown in Figure 3, also comprise the auxiliary oil channel 3 of the piston cavity that is communicated with interior oil cooling passage 2 and piston only, effectively accelerated the oil return of interior oil cooling passage.
The connecting rod chamber of mentioning in the such scheme refers to piston base and is used for holding connecting rod and connected cavity, and this connecting rod chamber is communicated with oil sump.Connecting rod is put into the connecting rod chamber of piston, the pin-and-hole that is used for the installation wrist pin on the piston runs through the connecting rod chamber, by the pin-and-hole on the connecting rod small end that wrist pin is passed connecting rod and the pin-and-hole on the piston, realize linking to each other of connecting rod and piston, connecting rod small end is near the top in connecting rod chamber.
The preferred auxiliary oil channel 3 of the utility model is connected on the ring shaped oil passage 21.Be communicated with ring shaped oil passage 21 by auxiliary oil channel 3, further improved the oil return effect.
Also auxiliary oil channel 3 can be communicated with oil-feed oil duct 22, to improve the oil mass that flows into the connecting rod chamber through auxiliary oil channel 3.
In the piston that the utility model embodiment provides, the axis of auxiliary oil channel 3 becomes the angle setting with the axis of piston only, is about to auxiliary oil channel 3 and ring shaped oil passage 21 oblique designs.Because piston cold oil in the to-and-fro motion process flows into by the oil-feed oil ducts 22 with ring shaped oil passage 21 vertical settings, and by flowing out with its fuel-displaced oil duct that vertically arranges 23, by with auxiliary oil channel 3 and ring shaped oil passage 21 oblique designs, guaranteed that fluid flows out ring shaped oil passage 21 with different amount, accelerated the oil return of cold oil, improve its internal flow, and then accelerated the outflow of heat.
As shown in Figure 3, auxiliary oil channel 3 is connected in the top in connecting rod chamber.Because piston is in the process that connecting rod moves, rubbing action produces certain heat mutually, so that the temperature drift of the pin-and-hole of connecting rod small end and the lining between the wrist pin, so that the degree of wear of lining is higher.In order to reduce this temperature, auxiliary oil channel 3 is communicated with the top in connecting rod chamber, thereby in to the piston only cooling, also can carry out auxiliary heat dissipation to connecting rod small end and wrist pin contact position, thereby effectively improved the working environment of connecting rod top and wrist pin, and then improve the working environment of lining, reduce its degree of wear.
In the reciprocating motion of the pistons process, can expanded by heating, consider that the head temperature of piston is higher, thus with the piston only top diameter less than base diameter.
Consider piston pin hole place material stacking, the rear amount of deformation that is heated is larger, in order further to adapt to the temperature distortion amount of piston, to guarantee suitable cylinder prepareding gap, can be designed to ellipse to the radial cross section of piston only, slightly short along the axial direction of the piston pin hole on the piston, radial direction is slightly long.
The top of piston only is provided be used to the intake valve valve pit 4 of dodging intake valve.For fear of " hitting the top phenomenon " of intake valve, can be at piston only top design intake valve valve pit 4.
Because intake valve is different from the open degree of exhaust valve, the space that need to dodge exhaust valve is larger.Be provided with simultaneously intake valve valve pit 4 and exhaust valve valve pit 1 on the piston in order better to adapt to, the exhaust valve valve pit 1 in the present embodiment is deeper than intake valve valve pit 4.
In the prior art, piston generally adopts Steel material, and its weight is large, has increased when affecting its movement effects to drive the required firing rate of its to-and-fro motion, so that it is lower to use the working efficiency of internal combustion engine of this kind piston.Piston only among the utility model embodiment is preferably the all-aluminium piston body.Aluminum alloy material is lighter with respect to Steel material, more is conducive to drive its motion, and then has saved firing rate, has improved the working efficiency of internal-combustion engine.
The utility model embodiment also provides a kind of internal-combustion engine, comprises cylinder and is arranged at the interior piston of cylinder, and piston is the piston in above-mentioned arbitrary scheme.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed is and other embodiments' difference that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make related domain professional and technical personnel can realize or use the utility model.Multiple modification to these embodiments will be apparent concerning those skilled in the art, and General Principle as defined herein can in the situation that does not break away from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a piston comprises piston only, it is characterized in that, the top of described piston only is provided be used to the exhaust valve valve pit (1) of dodging exhaust valve.
2. piston as claimed in claim 1 is characterized in that, is provided with on the described piston only be used to the interior oil cooling passage (2) that cools off described piston only.
3. piston as claimed in claim 2, it is characterized in that described interior oil cooling passage (2) comprises ring shaped oil passage (21) and the oil-feed oil duct (22) that is communicated with described ring shaped oil passage (21) respectively and the fuel-displaced oil duct (23) that is arranged circumferentially on described piston only.
4. piston as claimed in claim 3 is characterized in that, also comprises the auxiliary oil channel (3) in the connecting rod chamber that is communicated with described interior oil cooling passage (2) and described piston.
5. piston as claimed in claim 4 is characterized in that, described auxiliary oil channel (3) is connected on the described ring shaped oil passage (21).
6. piston as claimed in claim 5 is characterized in that, described auxiliary oil channel (3) is communicated with the top in described connecting rod chamber.
7. piston as claimed in claim 1 is characterized in that, the top diameter of described piston only is less than base diameter.
8. piston as claimed in claim 1 is characterized in that, the top of described piston only is provided be used to the intake valve valve pit (4) of dodging intake valve.
9. such as each described piston of claim 1-8, it is characterized in that described piston only is the all-aluminium piston body.
10. an internal-combustion engine comprises cylinder and is arranged at the interior piston of described cylinder, it is characterized in that described piston is such as each described piston of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220217785 CN202645760U (en) | 2012-05-15 | 2012-05-15 | Internal combustion engine and piston thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220217785 CN202645760U (en) | 2012-05-15 | 2012-05-15 | Internal combustion engine and piston thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202645760U true CN202645760U (en) | 2013-01-02 |
Family
ID=47414878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220217785 Expired - Lifetime CN202645760U (en) | 2012-05-15 | 2012-05-15 | Internal combustion engine and piston thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202645760U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423015A (en) * | 2012-05-15 | 2013-12-04 | 安徽华菱汽车有限公司 | Internal combustion engine and piston thereof |
| CN113374593A (en) * | 2021-06-30 | 2021-09-10 | 东风商用车有限公司 | Piston connecting rod structure and internal combustion engine |
-
2012
- 2012-05-15 CN CN 201220217785 patent/CN202645760U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423015A (en) * | 2012-05-15 | 2013-12-04 | 安徽华菱汽车有限公司 | Internal combustion engine and piston thereof |
| CN113374593A (en) * | 2021-06-30 | 2021-09-10 | 东风商用车有限公司 | Piston connecting rod structure and internal combustion engine |
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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: 20130102 |
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| CX01 | Expiry of patent term |