CN201461121U - Piston - Google Patents
Piston Download PDFInfo
- Publication number
- CN201461121U CN201461121U CN2009201282480U CN200920128248U CN201461121U CN 201461121 U CN201461121 U CN 201461121U CN 2009201282480 U CN2009201282480 U CN 2009201282480U CN 200920128248 U CN200920128248 U CN 200920128248U CN 201461121 U CN201461121 U CN 201461121U
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- CN
- China
- Prior art keywords
- pit
- hole
- avoiding
- piston
- exhaust valve
- 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 - Fee Related
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The utility model provides a piston. The piston consists of a top part, a head part and a shed part, wherein the surface of the top part is provided with an avoiding pit for an inlet valve, an avoiding pit for an exhaust valve, a concave pit and bumps; the avoiding pit for the inlet valve and the avoiding pit for the exhaust valve are distributed on the periphery, corresponding to the inlet valve and the exhaust valve of an engine, of the surface of the top part of the piston; and a smooth transition formed by connecting the bumps is formed between the avoiding pits. The concave pit is formed in the centre of the surface of the top part enclosed by the avoiding pit for the inlet valve, the avoiding pit for the exhaust valve and the bumps, and the concave pit is bowl-shaped or bathtub-shaped. As the concave pit is enclosed in the middle part by avoiding pits for the valves and the bumps on the two sides, air flow is guided by the bowl-shaped concave pit on the top part of the piston to form strong tumble flow by utilizing the peripheral avoiding pits for the valves, which is beneficial to improving charging efficiency of the engine and combustion rate of mixed gas so as to fulfill the aim of improving dynamic property of engine and economical efficiency of fuel.
Description
Technical field
The utility model relates to a kind of car engine machine part, specifically, relates to a kind of piston.
Background technique
Piston is the key components and parts in the crank-connecting rod mechanism for engine, and it mainly acts on is the gas pressure that bears in the cylinder, and power is passed to connecting rod by wrist pin, to promote crankshaft rotating.Wherein piston head is also formed the firing chamber jointly with cylinder head, cylinder wall.The piston head structure mainly contains flat-roof structure and peviform structure at present.For the flat roof type piston head, after charge air flow enters the firing chamber, rush at piston head, because of its top is a plane shape, air-flow can not form the stronger stream that rolls.And that stream is rolled in air inlet is very big to the rate of burning influence of the charging efficiency of motor and mixed gas, and the rate of burning of charging efficiency and mixed gas is high more, and engine power performance and Economy are high more.The piston head of peviform structure is an intermediate recess, all around the projection, roll stream though this structure can form air inlet, roll the flow process degree a little less than.In addition, present piston does not consider that on top structure dodging the effective of hole by middle pit with the valve of periphery combines, and improves the moving situation of air-flow, improves charging efficiency.
The model utility content
Technical problem to be solved in the utility model provides a kind of piston, forms the intensity of rolling stream to improve charge air flow in the firing chamber, and then improves rate of burning, improves engine power performance and fuel economy.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of piston, it is made up of top, head and skirt section.Have on the described top surface that intake valve is dodged the hole, exhaust valve is dodged hole, pit and projection.Intake valve is dodged hole and exhaust valve and is dodged the hole and be distributed in piston head surface by periphery and the position corresponding with the inlet and outlet door of motor, and intake valve is dodged and cheated and exhaust valve is dodged between the hole and is connected to form level and smooth transition by projection.Dodging hole, exhaust valve at intake valve dodges the neutral position of the top surface that hole and projection surround and arranges described pit, described pit is bowl-shape or the bathtub shape, and its edge and the intake valve of periphery dodge that the hole is dodged in hole, exhaust valve and protruding edge-smoothing transition is connected.
The technical program by the valve on the top surface of piston dodge the hole, the both sides bump encloses pit in the centre, air communication is crossed the bowl pockets guiding of piston head, and dodge the hole by means of the valve of periphery, more can form stronger air inlet and roll stream, help improving the rate of burning of motor charging efficiency and mixed gas, reach the purpose that improves engine power performance and fuel economy.
Description of drawings
Fig. 1 is a kind of structure of piston schematic representation of the present utility model.
Embodiment
As shown in Figure 1, be furnished with two intake valves on the top surface of piston and dodge hole 1, two exhaust valves are dodged hole 2, pit 3. intake valve dodge hole 1 and exhaust valve is dodged the peripheral position that hole 2 is distributed in top surface alive, and with the advancing of motor, the exhaust valve position correspondence. intake valve is dodged hole 1 and exhaust valve and is dodged between the hole 2 and 4 be connected to form level and smooth transition by projection. dodge hole 1 at intake valve, exhaust valve is dodged the neutral position of hole 2 and projection 4 top surfaces that surround and is arranged described pit 3, pit 3 is bowl-shape or the bathtub shape, and hole 1 is dodged with the intake valve of periphery in its edge, the edge-smoothing transition that exhaust valve is dodged hole 2 and projection 4 is connected.
In this structure, the effect that intake valve is dodged the hole is to make engine intake valve and piston not produce movement interference.The effect that valve is dodged the hole is to make engine valve and piston not produce movement interference.The effect of pit is after charge air flow enters the firing chamber, can lead to air-flow, improves air inlet and rolls stream.Adjust engine compression ratio by the volume of adjusting convex portion, precondition is not produce movement interference with cylinder cap; Can adjust the mixed gas flame combustion speed and the thermal efficiency after the compression ratio adjustment.
When engine charge, charge air flow is by piston head pit guiding, form stronger air inlet and roll stream, improved the movement velocity of gas, make the mixed gas contact more abundant, improve the rate of burning of motor charging efficiency and mixed gas, reach the purpose that improves engine power performance and fuel economy.
Claims (1)
1. piston, it is made up of top, head and skirt section; It is characterized in that having intake valve on the described top surface and dodge hole (1), exhaust valve and dodge hole (2), pit (3) and projection (4); Described intake valve is dodged hole (1) and exhaust valve and is dodged hole (2) and be distributed in the piston head surface by periphery and the position corresponding with the inlet and outlet door of motor, and intake valve is dodged hole (1) and exhaust valve and dodged between the hole (2) and be connected to form level and smooth transition by protruding (4); Dodging hole (1), exhaust valve at intake valve dodges the neutral position of the top surface that hole (2) and projection (4) surround and arranges described pit (3), described pit (3) is bowl-shape or the bathtub shape, and its edge and the intake valve of periphery are dodged hole (1), exhaust valve and dodged the edge-smoothing transition of hole (2) and protruding (4) and be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201282480U CN201461121U (en) | 2009-07-30 | 2009-07-30 | Piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201282480U CN201461121U (en) | 2009-07-30 | 2009-07-30 | Piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201461121U true CN201461121U (en) | 2010-05-12 |
Family
ID=42388475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201282480U Expired - Fee Related CN201461121U (en) | 2009-07-30 | 2009-07-30 | Piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201461121U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653326A (en) * | 2014-12-12 | 2015-05-27 | 重庆长安汽车股份有限公司 | Top structure of direct-injection gasoline engine piston |
| CN104879234A (en) * | 2015-05-22 | 2015-09-02 | 奇瑞汽车股份有限公司 | Engine piston |
| CN106640403A (en) * | 2016-08-29 | 2017-05-10 | 中国第汽车股份有限公司 | Tumble guide type high compression ratio piston of gasoline engine |
| CN107110063A (en) * | 2014-10-30 | 2017-08-29 | 费德罗-莫格尔有限责任公司 | Piston |
| CN112502848A (en) * | 2020-12-01 | 2021-03-16 | 东风汽车集团有限公司 | Piston for igniting compression ignition gasoline engine |
| CN114017194A (en) * | 2021-10-27 | 2022-02-08 | 东风汽车集团股份有限公司 | Ignition compression ignition gasoline engine piston and engine |
-
2009
- 2009-07-30 CN CN2009201282480U patent/CN201461121U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107110063A (en) * | 2014-10-30 | 2017-08-29 | 费德罗-莫格尔有限责任公司 | Piston |
| CN107110063B (en) * | 2014-10-30 | 2019-10-22 | 天纳克公司 | Piston |
| US10473056B2 (en) | 2014-10-30 | 2019-11-12 | Tenneco Inc. | Piston |
| CN104653326A (en) * | 2014-12-12 | 2015-05-27 | 重庆长安汽车股份有限公司 | Top structure of direct-injection gasoline engine piston |
| CN104879234A (en) * | 2015-05-22 | 2015-09-02 | 奇瑞汽车股份有限公司 | Engine piston |
| CN104879234B (en) * | 2015-05-22 | 2019-01-01 | 奇瑞汽车股份有限公司 | A kind of engine piston |
| CN106640403A (en) * | 2016-08-29 | 2017-05-10 | 中国第汽车股份有限公司 | Tumble guide type high compression ratio piston of gasoline engine |
| CN112502848A (en) * | 2020-12-01 | 2021-03-16 | 东风汽车集团有限公司 | Piston for igniting compression ignition gasoline engine |
| CN114017194A (en) * | 2021-10-27 | 2022-02-08 | 东风汽车集团股份有限公司 | Ignition compression ignition gasoline engine piston and engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20170730 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |