CN201206504Y - Engine piston structure - Google Patents
Engine piston structure Download PDFInfo
- Publication number
- CN201206504Y CN201206504Y CNU2008201176326U CN200820117632U CN201206504Y CN 201206504 Y CN201206504 Y CN 201206504Y CN U2008201176326 U CNU2008201176326 U CN U2008201176326U CN 200820117632 U CN200820117632 U CN 200820117632U CN 201206504 Y CN201206504 Y CN 201206504Y
- Authority
- CN
- China
- Prior art keywords
- piston
- ring
- groove
- piston structure
- insulation chamber
- 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
Links
Abstract
The utility model discloses an engine piston structure. Grooves are circularly formed on a piston basal body between two piston ring grooves to form an unloading thermal insulating cavity. The piston structure can reduce gas blowby and oil pumping amount by using the unloading thermal insulating cavity, shut off the heat flow, and improve the working conditions of the piston.
Description
Technical field
The utility model relates to a kind of piston structure, is a kind of piston structure that has the off-load heat-insulation chamber specifically.
Background technique
Be provided with piston ring on the piston matrix of motor,, can be divided into compression ring and oil ring two big classes according to the effect difference of piston ring.Compression ring is contained in the annular groove of piston matrix head upper end, and its effect is to be used for preventing gas leakage, and the heat transfer of piston crown is arrived cylinder wall, evacuates the heat of piston.The effect of oil ring is to prevent that lubricant oil from scurrying into the firing chamber, lubricant oil excessive on the cylinder wall is scraped got back to oil sump, and it is installed in the below annular groove of compression ring.
Current along with the improving constantly of emission standard, conservation-minded society sets up, and requires motor to reduce energy consumption.Motor reduces height, reduce volume and weight itself can reduce energy consumption, and alleviating of weight can reduce fuel consume simultaneously.In general, as long as guarantee the requirement of sealing function, much better the piston ring number is few than number, the piston ring number had both kept minimum friction area less, the power loss of reducing friction, shortened the height of piston again, the corresponding height that has also just reduced motor is a kind of effective measures that reduce fuel consume.
At present, the middling speed machine four road rings that adopt more, medium and small high speed engine adopts tricyclic structure increasing, and begins to develop to the direction of using bipassage ring, but under the prerequisite that reduces piston ring quantity, guarantee excellent sealing performance.
The model utility content
The purpose of this utility model provides a kind of scheme, guarantees that motor keeps excellent sealing performance and anti-channeling oiliness energy, so that further reduce the piston number of rings.
The utility model adopts following technological scheme: a kind of engine piston structure is characterized in that: be arranged circumferentially flutedly on the piston matrix between the twice piston ring groove, form the off-load heat-insulation chamber.
More satisfactory is that this off-load heat-insulation chamber is arranged between top-ring groove and the second-ring groove, and its effect is the most obvious.
This piston of the present utility model, because the piston matrix between the twice piston ring groove is provided with the off-load heat-insulation chamber, have following effect: 1, when the piston ring of gas on the off-load heat-insulation chamber when following piston ring flows, owing to increase in this gas communication cross section, off-load heat-insulation chamber place, reduced this place's gas pressure, thereby reduce the impact of gas, also reduced air leak amount and scurried oil mass following piston ring; The 2nd, because the minimizing of gas blowby, this off-load heat-insulation chamber also has partition by the hot-fluid effect of piston head biography to following piston ring, thereby alleviates the heat load of following piston ring, improves its operating conditions, prevents the piston ring bonding.Therefore, this piston structure can further reduce the quantity of piston ring, to reduce depth pistion and then to reduce motor volume and weight, realizes reducing the purpose of fuel consume and energy consumption.
Description of drawings
Fig. 1 partly cuts open schematic representation for engine piston structure of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments, to help understanding content of the present utility model.
As shown in Figure 1, be the schematic representation of a kind of engine piston structure of the present utility model.Engine piston matrix 1 is provided with three road piston ring groove 1a, 1c, 1d are respectively applied for three road piston rings are installed, and top-ring groove 1a and second-ring groove 1c are used to install the twice compression ring, and the 3rd road piston ring groove 1d is used to install oil ring.Between top-ring groove 1a and second-ring groove 1c, on piston matrix 1, be arranged circumferentially one groove, form off-load heat-insulation chamber 1b.Because the existence of off-load heat-insulation chamber 1b, make the gap between this position piston matrix 1 and cylinder wall become big, gas pressure by this position time of scurrying through top compression ring reduces, therefore can reduce impact to the second road compression ring and following oil ring, reduce air leak amount and scurry oil mass, improve sealing effect, and this off-load heat-insulation chamber 1b also has partition by the hot-fluid effect of piston head biography to the second road piston ring, thereby alleviate the heat load of the second road compression ring, prevent the piston ring bonding.
Off-load heat-insulation chamber 1b can certainly be arranged between piston ring groove 1c that the second road compression ring is installed and the 3rd road piston ring groove 1d that oil ring is installed, but because few through the air leak amount behind the second road compression ring, gas flow rate itself is lower, so the effect of off-load heat-insulation chamber 1b is not arranged between top-ring groove and the second-ring groove obviously.
Be understandable that this off-load heat-insulation chamber structure can also be applied on the piston of twice piston ring, be about to off-load heat-insulation chamber 1b and be arranged between piston ring groove that compression ring is installed and the piston ring groove that oil ring is installed.Can certainly be applied on the piston of four road rings.
The quantity of off-load heat-insulation chamber can be multiple tracks, is not limited to together, and both can be distributed between the different piston ring grooves, also can be arranged side by side between identical twice piston ring groove, with further enhancing off-load effect of heat insulation.
Claims (4)
1, a kind of engine piston structure is characterized in that: be arranged circumferentially flutedly on the piston matrix between the twice piston ring groove, form the off-load heat-insulation chamber.
2, engine piston structure as claimed in claim 1 is characterized in that: described off-load heat-insulation chamber is arranged on the top-ring groove of piston and the position between the second-ring groove.
3, engine piston structure as claimed in claim 2 is characterized in that: the described first road annular groove is for installing the groove of compression ring, and the described second road annular groove is for installing the groove of oil ring.
4, engine piston structure as claimed in claim 2 is characterized in that: the described first road annular groove and the second road annular groove are the groove that compression ring is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201176326U CN201206504Y (en) | 2008-06-06 | 2008-06-06 | Engine piston structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201176326U CN201206504Y (en) | 2008-06-06 | 2008-06-06 | Engine piston structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201206504Y true CN201206504Y (en) | 2009-03-11 |
Family
ID=40465570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201176326U Expired - Lifetime CN201206504Y (en) | 2008-06-06 | 2008-06-06 | Engine piston structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201206504Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883422A (en) * | 2012-12-19 | 2014-06-25 | 重庆长安汽车股份有限公司 | Piston of supercharged engine |
| CN107084069A (en) * | 2017-05-22 | 2017-08-22 | 无锡华星机电制造有限公司 | A kind of engine piston |
| CN111456865A (en) * | 2020-04-09 | 2020-07-28 | 南京尚德柴油机有限公司 | Internal combustion engine piston and internal combustion engine |
-
2008
- 2008-06-06 CN CNU2008201176326U patent/CN201206504Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883422A (en) * | 2012-12-19 | 2014-06-25 | 重庆长安汽车股份有限公司 | Piston of supercharged engine |
| CN103883422B (en) * | 2012-12-19 | 2016-06-01 | 重庆长安汽车股份有限公司 | A kind of engine with supercharger piston |
| CN107084069A (en) * | 2017-05-22 | 2017-08-22 | 无锡华星机电制造有限公司 | A kind of engine piston |
| CN111456865A (en) * | 2020-04-09 | 2020-07-28 | 南京尚德柴油机有限公司 | Internal combustion engine piston 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: 20090311 |
|
| CX01 | Expiry of patent term |