CN102979633A - Engine with compression ratio alterable and automobile - Google Patents
Engine with compression ratio alterable and automobile Download PDFInfo
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- CN102979633A CN102979633A CN2011102626923A CN201110262692A CN102979633A CN 102979633 A CN102979633 A CN 102979633A CN 2011102626923 A CN2011102626923 A CN 2011102626923A CN 201110262692 A CN201110262692 A CN 201110262692A CN 102979633 A CN102979633 A CN 102979633A
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- cylinder sleeve
- compression ratio
- cylinder body
- motor
- cylinder
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Abstract
The invention provides an engine with the compression ratio alterable and an automobile. The engine with the compression ratio alterable comprises a cylinder cover, a cylinder body, a piston and a cylinder sleeve, wherein an inner bore of the cylinder sleeve is cylindrical, the inner bore of the cylinder sleeve is in sleeved connection with the cylinder body in a sliding mode along the axis direction of the cylinder sleeve and is installed in an inner bore of the cylinder body, the cylinder sleeve is fixedly connected with the cylinder cover, and the piston is arranged in the cylinder sleeve. According to the engine with the compression ratio alterable and the automobile, the volume of a combustion chamber can be changed due to the fact that the cylinder sleeve connected with the cylinder cover in a fixed mode can slide relative to the cylinder body, and therefore the compression ratio of the engine is changed, and economical efficiency of the engine is improved due to the fact that proper compression ratios can be chosen for different working conditions.
Description
Technical field
The present invention relates to the Vehicle Engine Structure technology, relate in particular to a kind of motor and automobile of alterable compression ratio.
Background technique
Motor is very important parts on the automobile, and as depicted in figs. 1 and 2, Fig. 1 and Fig. 2 are the partial structurtes schematic representation of prior art motor, Figure 1 shows that the piston of available engine is positioned at the state of top dead center; State when the piston that Figure 2 shows that this motor is positioned at lower dead center, the cylinder cap 1 of available engine is fixed on the cylinder body 2 by bolt 6, piston 3 is in cylinder body 2 interior to-and-fro motion, and to drive transmission system work, the parts such as piston 3, cylinder body 2 and cylinder cap 1 surround firing chamber 4.Piston 3 is respectively top dead center 5 and lower dead center 7 at the limit position of cylinder body 2 interior motions, and when piston 3 was positioned at top dead center 5, the volume of firing chamber 4 was minimum; When piston 3 was positioned at lower dead center 7, the volume of firing chamber 4 was maximum, and the ratio of above-mentioned maximum volume and minimum volume is the compression ratio of motor.
The raising of engine compression ratio can effectively improve thermal efficiency of cycle, thereby improves the Economy of motor.Although improve the Economy that compression ratio can improve motor, for petrol engine, improved compression ratio, when the automobile load is larger, can there be the pinking problem, so the upper limit of available engine compression ratio is restricted.
But during for sub load, the possibility that produces pinking is less, if still adopt above-mentioned less compression ratio, then the Economy of motor is not high.Existing engine compression ratio is changeless, the Economy of motor when improving sub load, and engine design engineer is seeking a kind of scheme of simple, effective, practical alterable compression ratio always.
Summary of the invention
The invention provides a kind of motor and automobile of alterable compression ratio, can't carry out the defective that compression ratio is adjusted according to load variations with the motor that solves existing fixedly compression ratio, improve the Economy of motor.
The invention provides a kind of motor of alterable compression ratio, comprise cylinder cap, cylinder body and piston, wherein, also comprise:
Cylinder sleeve, the endoporus of described cylinder sleeve are cylindric, and the axial direction along described cylinder sleeve on described cylinder body is slidingly socketed and is installed in the endoporus of described cylinder body; Described cylinder sleeve is fixedly connected with described cylinder cap; Described piston is contained in the described cylinder sleeve.
The motor of aforesaid alterable compression ratio, wherein, preferably: the outer wall lower end of described cylinder sleeve is provided with positioning block, and described positioning block cooperates that with the locating slot that described inboard wall of cylinder block lower end is offered described cylinder sleeve is positioned.
The motor of aforesaid alterable compression ratio, wherein, preferably: the quantity of described positioning block is two, cylinder sleeve longitudinal center axis is symmetricly set on the outer wall of described cylinder sleeve relatively; The quantity of described locating slot is two, and cylinder body longitudinal center axis is symmetricly set on the inwall of described cylinder body relatively.
The motor of aforesaid alterable compression ratio, wherein, preferably: described locating slot is 3-6mm along the longitudinal length of described inboard wall of cylinder block, thus the distance that described cylinder sleeve is moved along cylinder body is 3-6mm.。
The motor of aforesaid alterable compression ratio wherein, also comprises:
The cylinder sleeve position adjusting mechanism links to each other with described positioning block, is used for driving described positioning block and slides up and down along described locating slot, moves up and down in the mounting hole of cylinder body thereby adjust cylinder sleeve.
The present invention also provides a kind of automobile, wherein, comprises the motor of alterable compression ratio provided by the invention.
The motor of alterable compression ratio provided by the invention and the automobile cylinder sleeve by being fixed with cylinder cap relatively cylinder body slides to change the volume of firing chamber, thereby change the compression ratio of motor, under different operating modes, select suitable compression ratio, improved the Economy of motor.Relatively conventional engines does not change chamber structure, can not produce extra demand to the high-pressure gas seal of burning, and Sealing can design identically with prior art, and air leakage can additionally not increase yet.Simultaneously the present invention does not introduce extra operation friction pair, does not have extra operation surface friction drag to cause engine power to reduce, because engine structure changes not quite, weight increases few, can not offset Economy improvement level because increasing too much weight.
Description of drawings
Fig. 1 is the partial structurtes schematic representation of the piston of prior art motor when being positioned at top dead center.
Fig. 2 is the partial structurtes schematic representation of the piston of prior art motor when being positioned at lower dead center.
Piston when the cylinder sleeve of engine of the alterable compression ratio that Fig. 3 provides for the embodiment of the invention is in and slips into state is positioned at the partial structurtes schematic representation of top dead center.
Piston when the cylinder sleeve of engine of the alterable compression ratio that Fig. 4 provides for the embodiment of the invention is in and slips into state is positioned at the partial structurtes schematic representation of lower dead center.
Piston when the cylinder sleeve of engine of the alterable compression ratio that Fig. 5 provides for the embodiment of the invention is in and skids off state is positioned at the partial structurtes schematic representation of top dead center.
Piston when the cylinder sleeve of engine of the alterable compression ratio that Fig. 6 provides for the embodiment of the invention is in and skids off state is positioned at the partial structurtes schematic representation of lower dead center.
Reference character:
The 1-cylinder cap; The 2-cylinder body; The 3-piston;
The 4-firing chamber; The 5-top dead center; The 6-bolt;
The 7-lower dead center; The 8-cylinder sleeve; The 9-positioning block;
10-cylinder sleeve position adjusting mechanism.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, the technological scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiments.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment who obtains under the creative work prerequisite.
The partial structurtes schematic representation of the motor of the alterable compression ratio that Fig. 3-Fig. 6 provides for the embodiment of the invention, the cylinder sleeve that Figure 3 shows that motor is in the state of slipping into and piston is positioned at top dead center, the cylinder sleeve that Figure 4 shows that this motor is in the state of slipping into and piston is positioned at lower dead center, the cylinder sleeve that Figure 5 shows that this motor is in the state of skidding off and piston is positioned at top dead center, and the cylinder sleeve that Figure 6 shows that this motor is in the state of skidding off and piston is positioned at lower dead center.The embodiment of the invention provides a kind of motor of alterable compression ratio, as shown in Figure 3, this motor comprises cylinder cap 1, cylinder body 2 and piston 3, wherein also comprises cylinder sleeve 8, the endoporus of this cylinder sleeve 8 is cylindric, and the axial direction along cylinder sleeve 8 on cylinder body 2 is slidingly socketed and is installed in the endoporus of cylinder body 2; Cylinder sleeve 8 is fixedly connected with described cylinder cap 1, specifically can be to be bolted; Piston 3 is contained in the cylinder sleeve 8.Can be understood as, compared with prior art, cylinder body 2 of the prior art is designed to the two-part that can relatively move up and down, and namely cylinder sleeve 8 can slide up and down at the endoporus of cylinder body 2 along cylinder sleeve 8 axis, cylinder sleeve 8 is fixed on the inwall of cylinder body 2 after sliding into suitable position.Because the relative cylinder body 2 with bottom dead center position of top dead center that piston 3 length determine all immobilizes, the position that changes the cylinder sleeve 8 relative cylinder bodies 2 that are fixed with cylinder cap 1 just can change the volume of firing chamber, thereby realizes the variation of compression ratio.
The combustion chamber volume of piston 3 top dead centers and lower dead center is respectively V1 and V2, compression ratio is r=V2/V1, please refer to Fig. 3 and Fig. 4, for the less operating mode of engine load, cylinder sleeve 8 is slipped into desired location along cylinder body 2 towards piston 3 directions, fixedly cylinder sleeve 8, and the volume of firing chamber can reduce dV accordingly, and the compression ratio of this moment is r=(V2-dV)/(V1-dV), at this moment, at this moment compression ratio is larger, is applicable to the little operating mode of loading, and has improved the Economy of motor.
Please refer to Fig. 5 and Fig. 6, for the larger operating mode of engine load, cylinder sleeve 8 is slided out to desired location along cylinder body 2 away from piston 3 directions, fixedly cylinder sleeve 8, the volume of firing chamber can increase dV accordingly, and the compression ratio of this moment is r=(V2+dV)/(V1+dV), and compression at this moment is smaller, be applicable to the large operating mode of loading, can prevent pinking.The arbitrary position of its adjustable lift can be fixed on because cylinder sleeve slides, the multistage continuous variable of engine compression ratio can be realized.
Preferably, be provided with positioning block 9 in the outer wall lower end of cylinder sleeve 8, the locating slot of offering with cylinder body 2 inwall lower ends is fixed.This locating slot can be designed to " worker " font, when changing cylinder sleeve 8 position, can slide to realize by the intermediate section of positioning block 9 along locating slot, fixedly during cylinder sleeve 8 position, positioning block 9 can be connected to the two ends of locating slot.
Further, the quantity of positioning block 9 is two, and cylinder sleeve 8 longitudinal center's axis are symmetricly set on the outer wall of cylinder sleeve 8 relatively; The quantity of locating slot also is two, and cylinder body 2 longitudinal center's axis are symmetricly set on the inwall of cylinder body 2 relatively.Symmetrically arranged positioning block 9 can make cylinder sleeve 8 more steady in the process of sliding with locating slot.
Locating slot is preferably set to 3-6mm along the longitudinal length of cylinder body 2 inwalls, in actual applications, cylinder sleeve 8 relative cylinder body 2 slide displacements that are fixed with cylinder cap 1 can be realized the range of value between 8-14 of compression ratio between 3-6mm the time, are applicable to various working generally.
In the above-described embodiments, can also be provided with cylinder sleeve position adjusting mechanism 10, link to each other with positioning block 9, be used for drive positioning block 9 and move up and down along locating slot.The regulating mechanism 10 of example can be hydraulic driving and with spacing mechanism.
The motor of the alterable compression ratio that the embodiment of the invention provides is by sliding up and down the volume that changes the firing chamber with respect to cylinder body with the fixing cylinder sleeve of cylinder cap, and then change compression ratio, can under different operating modes, select suitable compression ratio, thereby improve the Economy of motor.Design simultaneously easyly, relatively the available engine structural change is less, and use value is high.
The embodiment of the invention also provides a kind of automobile, the motor of the alterable compression ratio that provides comprising any embodiment of the present invention.
The automobile that the embodiment of the invention provides by the compression ratio of the motivation of haircuting in different operating mode downward modulations, is selected the compression ratio adaptive with engine load, has improved the Economy of motor.
It should be noted that at last: above embodiment only in order to technological scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technological scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characteristics wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technological scheme.
Claims (6)
1. the motor of an alterable compression ratio comprises cylinder cap (1), cylinder body (2) and piston (3), it is characterized in that, also comprises:
Cylinder sleeve (8), the endoporus of described cylinder sleeve (8) is cylindric, is slidingly socketed and is installed in the endoporus of described cylinder body (2) at the upper axial direction along described cylinder sleeve (8) of described cylinder body (2); Described cylinder sleeve (8) is fixedly connected with described cylinder cap (1); Described piston (3) is contained in the described cylinder sleeve (8).
2. the motor of alterable compression ratio according to claim 1, it is characterized in that: the outer wall lower end of described cylinder sleeve (8) is provided with positioning block (9), and described positioning block (9) cooperates that with the locating slot that described cylinder body (2) inwall lower end is offered described cylinder sleeve (8) is positioned.
3. the motor of alterable compression ratio according to claim 2, it is characterized in that: the quantity of described positioning block (9) is two, cylinder sleeve (8) longitudinal center axis is symmetricly set on the outer wall of described cylinder sleeve (8) relatively; The quantity of described locating slot is two, and cylinder body (2) longitudinal center axis is symmetricly set on the inwall of described cylinder body (2) relatively.
4. according to claim 2 or the motor of 3 described alterable compression ratios, it is characterized in that: described locating slot is 3-6mm along the longitudinal length of described cylinder body (2) inwall, is 3-6mm thereby make described cylinder sleeve (8) along the mobile distance of cylinder body (2).
5. according to claim 2 or the motor of 3 described alterable compression ratios, it is characterized in that, also comprise:
Cylinder sleeve position adjusting mechanism (10), link to each other with described positioning block (9), be used for driving described positioning block (9) and move up and down along described locating slot, move up and down in the mounting hole of described cylinder body (2) thereby adjust described cylinder sleeve (8).
6. an automobile is characterized in that, comprises the motor of the arbitrary described alterable compression ratio of claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102626923A CN102979633A (en) | 2011-09-06 | 2011-09-06 | Engine with compression ratio alterable and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102626923A CN102979633A (en) | 2011-09-06 | 2011-09-06 | Engine with compression ratio alterable and automobile |
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| Publication Number | Publication Date |
|---|---|
| CN102979633A true CN102979633A (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011102626923A Pending CN102979633A (en) | 2011-09-06 | 2011-09-06 | Engine with compression ratio alterable and automobile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019094865A (en) * | 2017-11-24 | 2019-06-20 | 株式会社Ihi | Two-stroke engine |
| CN112282931A (en) * | 2020-10-20 | 2021-01-29 | 苗立志 | New energy automobile engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002103174A1 (en) * | 2001-06-14 | 2002-12-27 | Spyridon Pappas | Variable displacement and variable compression ratio internal combustion engine, powered by alternative fuel |
| DE10225587A1 (en) * | 2002-06-04 | 2004-01-08 | Flierl, Rudolf, Dr. | IC engine with variable compression ratio has the cylinder moved w.r.t. the crankshaft and with automatic compensation of the ignition timing |
| JP2009024656A (en) * | 2007-07-23 | 2009-02-05 | Toyota Motor Corp | Variable compression ratio internal combustion engine |
| JP2009114989A (en) * | 2007-11-07 | 2009-05-28 | Toyota Motor Corp | Variable compression ratio engine and engine system |
| CN101730792A (en) * | 2007-07-12 | 2010-06-09 | 丰田自动车株式会社 | Spark-ignited internal combustion engine and method of controlling the same |
-
2011
- 2011-09-06 CN CN2011102626923A patent/CN102979633A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002103174A1 (en) * | 2001-06-14 | 2002-12-27 | Spyridon Pappas | Variable displacement and variable compression ratio internal combustion engine, powered by alternative fuel |
| DE10225587A1 (en) * | 2002-06-04 | 2004-01-08 | Flierl, Rudolf, Dr. | IC engine with variable compression ratio has the cylinder moved w.r.t. the crankshaft and with automatic compensation of the ignition timing |
| CN101730792A (en) * | 2007-07-12 | 2010-06-09 | 丰田自动车株式会社 | Spark-ignited internal combustion engine and method of controlling the same |
| JP2009024656A (en) * | 2007-07-23 | 2009-02-05 | Toyota Motor Corp | Variable compression ratio internal combustion engine |
| JP2009114989A (en) * | 2007-11-07 | 2009-05-28 | Toyota Motor Corp | Variable compression ratio engine and engine system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019094865A (en) * | 2017-11-24 | 2019-06-20 | 株式会社Ihi | Two-stroke engine |
| CN112282931A (en) * | 2020-10-20 | 2021-01-29 | 苗立志 | New energy automobile engine |
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Application publication date: 20130320 |