CN203214178U - Variable compression engine - Google Patents
Variable compression engine Download PDFInfo
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- CN203214178U CN203214178U CN 201320081889 CN201320081889U CN203214178U CN 203214178 U CN203214178 U CN 203214178U CN 201320081889 CN201320081889 CN 201320081889 CN 201320081889 U CN201320081889 U CN 201320081889U CN 203214178 U CN203214178 U CN 203214178U
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- compression ratio
- valve
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- variable compression
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Abstract
The utility model discloses a variable compression engine which can overcome the defect that a compression engine in the prior art cannot achieve the function of adjusting the compression ratio. The variable compression engine can use the higher compression ratio in low load, can use the lower compression ratio in high load and enables the compression ratio to be adjustable. The variable compression engine comprises an air cylinder casing and a piston, wherein a column adjusting cavity is formed in the top of the inner side of the air cylinder casing, an adjusting valve is arranged in the adjusting cavity, and the adjusting valve is provided with a hydraulic control device. The variable compression engine has the advantages of adjusting the total volume of an air cylinder to adjust the compression ratio, being capable of dynamically adjusting the total volume of the air cylinder, increasing the compression ratio to the larger degree, having larger air inflow and higher air exhaust efficiency and the like.
Description
Technical field
The utility model relates to a kind of motor, relates in particular to a kind of motor that can change compression ratio.
Background technique
At present, a kind of supercharged engine is widely used in automotive industry, and in the design of supercharged engine, in order to prevent pinking, its compression ratio is lower than naturally aspirated engine.But such design also comes with some shortcomings: when the low running on the lower load of boost pressure, the low compression ratio design makes the thermal efficiency on the low side, and fuel economy is descended.Especially in turbosupercharged engine because supercharging level rises slowly, moment of torsion rises very slowly under the low compression ratio condition, forms so-called turbo lag phenomenon.Therefore, reach the performance of optimizing the most for making supercharged engine, need when running on the lower load, use higher compression ratio, guarantee fuel economy; When the high load operating mode, suitably reduce compression ratio and prevent sudden and violent shake.And the compression ratio of motor immobilizes and can't satisfy such requirement in the prior art.
Chinese patent notice of authorization number: CN 201155365Y, notice of authorization day: disclosed a kind of motor on November 26th, 2008, comprised along the piston of cylinder axially reciprocating, the bottom of described piston connects the top of piston rod, and the bottom of described connecting rod is connected in the rod journal of bent axle; Described piston is shell shape piston, and its crank radius can be 96.69mm, and compression ratio can be reached for 9.7.Motor provided by the utility model, its compression ratio is higher, so output power will enlarge markedly, and economic performance and exhaust quality also can improve.Its deficiency is: can't use higher compression ratios when running on the lower load, and be adjusted to than low compression ratio when the high load operating mode.
The model utility content
But the utility model is in order to overcome the deficiency that compression engine of the prior art can't real compression ratio regulatory function, provide and at low-load the time, to have used higher compression ratios, and when high load, use than low compression ratio, realize the adjustable a kind of variable compression ratio engine of compression ratio.
For achieving the above object, the utility model is by the following technical solutions:
A kind of variable compression ratio engine of the present utility model comprises cylinder shell and piston, is provided with a cylindricality in the inside top of cylinder shell and regulates cavity, regulates being provided with one in the cavity and regulating valve, regulates valve and is provided with hydraulic control device.Regulate the volume of cavity and the connection of original cylinder interior space by the upper-lower position of regulating valve with adjusting, thereby regulate the total measurement (volume) of cylinder.Reach the effect of regulating engine compression ratio in this way.
As preferably, it be circular regulating the cavity horizontal cross sectional geometry, adjusting valve fit adjustment cavity geometry.Columniform adjusting cavity is easy to process, and its madial wall shape is excessively level and smooth, and is not easy to wear when the adjusting valve frequently moves up and down therein.And regulate valve fit adjustment cavity geometry, make the adjusting valve and regulate cavity wall contacting point seal stronger.Be beneficial to the adjusting cylinder total volume.
As preferably, to regulate cavity and be provided with a pod apertures, described pod apertures is communicated with regulates cavity and cylinder exhaust pipe.Pod apertures make regulate cavity be positioned at regulate valve with part and cylinder exhaust pipe be communicated with, regulate valve with the air pressure in interior space, its operation of not exchanging closure is exerted an influence.
As preferably, described hydraulic control device comprises solenoid valve and controller, and solenoid valve connects controller.Solenoid valve is convenient to regulate control, and can adapt to higher operation frequency, upper-lower position that can fast and flexible ground adjusting valve.When engine piston begins downward operation (aspirating stroke) from top dead center, regulate the effect of valve by solenoid valve and move upward, displacement is increased, cylinder degree of vacuum is increased, increase air inflow; When engine piston upwards moves (compression stroke) from lower dead center, regulate valve and under the effect of solenoid valve, move downward, compressed mixed gas increases cylinder pressure simultaneously; When cylinder is finished compression stroke, piston is from top dead center operation 180 degree (expansion stroke, exhaust stroke), limit position below the adjusting valve remains on is motionless, the energy that burning is produced is converted into the kinetic energy of engine piston to greatest extent, and the waste gas that burning is produced is discharged cylinder to greatest extent.Realize dynamic control cylinder total measurement (volume) by this mode, can increase engine compression ratio to a great extent, the reply running on the lower load guarantees fuel economy.
As preferably, to regulate cavity wall and be vertically installed with lock, described lock connects hydraulic control device.Described lock is used for adding strong fix and regulates the valve position, prevents from pressing in the cylinder in the cylinder compression process and lifts the adjusting valve, guarantees its adjusting compression ratio stability.
As preferably, to regulate valve and seal when regulating the cavity end opening, described lock leans regulates the valve top.When regulating valve sealing adjusting cavity end opening, add strong fix and regulate valve, when preventing compression stroke and expansion stroke, regulate on the valve and lift, guarantee its working stability.
As preferably, described adjusting valve bottom surface is made as conical surface.When the cylinder expansion stroke, to regulate the valve bottom surface and can be subjected to greater impact, the bottom surface is made as conical surface can effectively improve its impact strength.
Therefore, the utlity model has following beneficial effect: (1) can regulate engine compression ratio by regulating cylinder total volume; (2) can the dynamic adjustments cylinder total volume, go up increasing compression ratio largely; (3) have bigger air inflow and higher exhaust efficiency.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described further.
Embodiment: as shown in Figure 1, a kind of variable compression ratio engine of the present utility model, comprise cylinder shell 1 and piston 2, inside top at cylinder shell 1 is provided with a cylindrical adjusting cavity 3, described adjusting cavity 3 is positioned at spark plug 10 1 sides, and the parallel piston 2 upper and lower moving direction in its medial axis.Regulate being provided with an adjusting valve 4 in the cavity 3, regulate valve 4 fit adjustment cavitys 3 shapes.
Regulate valve 4 bottom surfaces and be made as conical surface.When the cylinder expansion stroke, to regulate valve 4 bottom surfaces and can be subjected to greater impact, the bottom surface is made as conical surface can effectively improve its impact strength.
Regulate valve 4 tops and be provided with a connecting rod, connect hydraulic control device by this lever regulated valve 4.Hydraulic control device comprises solenoid valve 8 and controller, and solenoid valve 8 connects controller.Upper-lower position by controller control solenoid valve 8 and then regulating and controlling valve 4.Can regulate the volume of cavity 3 and the connection of original cylinder interior space by the upper-lower position of regulating valve 4, thereby regulate the total measurement (volume) of cylinder.Reach the effect of regulating engine compression ratio in this way.Solenoid valve 8 is convenient to regulate control, and can adapt to higher operation frequency, upper-lower position that can fast and flexible ground adjusting valve 4.When engine piston 2 begins downward operation (aspirating stroke) from top dead center, regulate valve 4 and move upward, displacement is increased, cylinder degree of vacuum is increased, increase air inflow; When engine piston 2 upwards moves (compression stroke) from lower dead center, regulate valve 4 and move downward in the effect of solenoid valve 8, compressed mixed gas increases cylinder pressure simultaneously; When cylinder is finished compression stroke, piston 2 is from top dead center operation 180 degree (expansion stroke, exhaust stroke), limit position below adjusting valve 4 remains on is motionless, the energy that burning is produced is converted into the kinetic energy of engine piston 2 to greatest extent, and the waste gas that burning is produced is discharged cylinder to greatest extent.Realize dynamic control cylinder total measurement (volume) by this mode, can increase engine compression ratio to a great extent, the reply running on the lower load guarantees fuel economy.
Regulate cavity 3 and be provided with a pod apertures 5, described pod apertures 5 is communicated with regulates cavity 3 and cylinder exhaust pipe 6.The opening that described pod apertures 5 is communicated with cylinder exhaust pipe 6 is positioned at exhaust valve 7 rears.Pod apertures 5 be regulate cavity 3 be positioned at regulate valve 4 with part and cylinder exhaust pipe 6 be communicated with, regulate the air pressure in space, valve 4 skirt section, its operation of not exchanging closure 4 is exerted an influence.
Regulate cavity 3 sidewalls and be vertically installed with lock 9, described lock 9 is provided with hydraulic control device.When regulating valve 4 sealing adjusting cavitys 3 end openings, described lock 9 leans regulates valve 4 tops.Described lock 9 is used for adding strong fix and regulates valve 4 positions.When regulating valve 4 sealing adjusting cavitys 3 end openings, add strong fix and regulate valve 4, when preventing compression stroke and expansion stroke, regulate on the valve 4 and lift, guarantee its working stability.
Claims (7)
1. variable compression ratio engine, comprise cylinder shell (1) and piston (2), it is characterized in that, be provided with a cylindricality in the inside top of cylinder shell (1) and regulate cavity (3), regulate being provided with an adjusting valve (4) in the cavity (3), regulate valve (4) and be provided with hydraulic control device.
2. a kind of variable compression ratio engine according to claim 1 is characterized in that, it is circular regulating cavity (3) horizontal cross sectional geometry, regulates valve (4) fit adjustment cavity (3) shape.
3. a kind of variable compression ratio engine according to claim 1 is characterized in that, regulates cavity (3) and is provided with a pod apertures (5), and described pod apertures (5) is communicated with regulates cavity (3) and cylinder exhaust pipe (6).
4. according to claim 1 or 2 or 3 described a kind of variable compression ratio engines, it is characterized in that described hydraulic control device comprises solenoid valve (8) and controller, solenoid valve (8) connects controller.
5. according to claim 1 or 2 or 3 described a kind of variable compression ratio engines, it is characterized in that regulate cavity (3) sidewall and be vertically installed with lock (9), described lock (9) connects hydraulic control device.
6. according to the described a kind of variable compression ratio engine of claim 5, it is characterized in that when regulating valve (4) sealing adjusting cavity (3) end opening, described lock (9) leans regulates valve (4) top.
7. according to claim 1 or 2 or 3 described a kind of variable compression ratio engines, it is characterized in that described adjusting valve (4) bottom surface is made as conical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320081889 CN203214178U (en) | 2013-02-22 | 2013-02-22 | Variable compression engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320081889 CN203214178U (en) | 2013-02-22 | 2013-02-22 | Variable compression engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203214178U true CN203214178U (en) | 2013-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320081889 Expired - Lifetime CN203214178U (en) | 2013-02-22 | 2013-02-22 | Variable compression engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203214178U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727955A (en) * | 2013-12-18 | 2015-06-24 | 现代自动车株式会社 | Variable compression ratio engine |
| CN113669170A (en) * | 2021-08-10 | 2021-11-19 | 东风汽车集团股份有限公司 | Engine compression ratio adjusting method and device |
| CN114278431A (en) * | 2021-12-30 | 2022-04-05 | 潍柴动力股份有限公司 | Engine with variable compression ratio and control method thereof |
-
2013
- 2013-02-22 CN CN 201320081889 patent/CN203214178U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727955A (en) * | 2013-12-18 | 2015-06-24 | 现代自动车株式会社 | Variable compression ratio engine |
| CN104727955B (en) * | 2013-12-18 | 2019-03-12 | 现代自动车株式会社 | Variable compression ratio engine |
| CN113669170A (en) * | 2021-08-10 | 2021-11-19 | 东风汽车集团股份有限公司 | Engine compression ratio adjusting method and device |
| CN113669170B (en) * | 2021-08-10 | 2023-02-24 | 东风汽车集团股份有限公司 | Engine compression ratio adjusting method and device |
| CN114278431A (en) * | 2021-12-30 | 2022-04-05 | 潍柴动力股份有限公司 | Engine with variable compression ratio and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: NINGBO GEELY ROYAL ENGINE COMPONENTS Co.,Ltd. Assignor: Zhejiang Geely Automobile Research Institute Co.,Ltd. Hangzhou Branch|ZHEJIANG GEELY AUTOMOBILE RESEARCH INSTITUTE Co.,Ltd.|ZHEJIANG GEELY HOLDING GROUP Co.,Ltd. Contract record no.: 2014330000114 Denomination of utility model: Compression ratio variable engine Granted publication date: 20130925 License type: Exclusive License Record date: 20140429 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130925 |
|
| CX01 | Expiry of patent term |