CN1696481A - Method for implementing increment of expansion ratio of reciprocating intermal-combustion engine and control of compression ratio - Google Patents
Method for implementing increment of expansion ratio of reciprocating intermal-combustion engine and control of compression ratio Download PDFInfo
- Publication number
- CN1696481A CN1696481A CN 200410014910 CN200410014910A CN1696481A CN 1696481 A CN1696481 A CN 1696481A CN 200410014910 CN200410014910 CN 200410014910 CN 200410014910 A CN200410014910 A CN 200410014910A CN 1696481 A CN1696481 A CN 1696481A
- Authority
- CN
- China
- Prior art keywords
- cam
- turns over
- angle
- dead center
- crank
- 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.)
- Pending
Links
Landscapes
- Output Control And Ontrol Of Special Type Engine (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The present invention discloses a method for increasing expansion ratio of reciprocating internal combustion engine and controlling its compression ratio. Said method utilizes the regulation of maximum volume V2 and minimum volume V1 of the cylinder to make the expansion ratio V2/V1 be increased, and utilizes change of cam form and port timing of air inlet and outlet valves to make the effectively-compressed actuating meduim volume be V3, V1 less than V3 less than V2, the compression ratio is V3/V1, so that it can target the goal of increasing engine thermal powder conversion.
Description
Technical field
The present invention relates to a kind of internal-combustion engine, specifically is a kind of method that increases reciprocal internal-combustion engine expansion ratio and control compression ratio.
Background technique
Internal-combustion engine is called the heart of automobile, and the quality of engine performance has determined the quality of automobile.A large amount of at present reciprocating internal combustion engine thermal efficiency ratios of using are lower, and the economic performance that improves internal-combustion engine seems and is even more important.Present quartastroke engine acting expansion ratio equals compression ratio, after acting finishes, working medium still has certain pressure, at this moment, working medium also has the ability of external workmanship, can realize that by increasing expansion ratio more hot merit transforms, but excessive compression ratio makes that internal-combustion engine can't proper functioning, expansion ratio is limited by compression ratio, and this part hot merit conversion does not just realize, but discharges cylinder.
Summary of the invention
The purpose of this invention is to provide a kind of simple and effectively practical method, the intake and exhaust cam shape is improved, the control compression ratio, and enlarge its expansion ratio, improve the efficient that hot merit transforms.
Technological scheme of the present invention is as follows:
A kind of method that realizes increasing reciprocal internal-combustion engine expansion ratio and control compression ratio, by adjusting the maximum volume V2 of cylinder, with minimum volume V1, expansion ratio V2/V1 is increased,, change the port timing of inlet and exhaust valve by changing cam face, the working medium volume that makes effective compression is V3, V1＜V3＜V2, compression ratio V3/V1 adapts to and takes one of following measures: 1, suction stroke, crank turns over top dead center angle, 0＜＜180, during cylinder volume V3, IC Intake Valve Closes, gas expand into V2 by V3, recompress V1, corresponding cam face is changed to: in aspirating stroke, crank forwards top dead center to, intake cam turns over /2+ ρ angle again, ρ is the gap offset angle, and the cam follower contact arrives the cam base circle position, and all the other are constant; 2, compression stroke, crank turns over lower dead center angle, and 0＜＜180 are when the cylinder volume is V3, IC Intake Valve Closes, unnecessary gas is discharged from intake valve, and corresponding cam face is changed to: in compression stroke, crank forwards lower dead center to, intake cam turns over /2+ ρ angle again, ρ is the gap offset angle, and the cam follower contact arrives the cam base circle position, and all the other are constant; 3, compression stroke, crank turns over lower dead center β angle,-＜β＜, 0＜＜180, exhaust valve is opened, and crank turns over lower dead center angle, the cylinder volume is V3, exhaust valve closing, unnecessary gas is discharged from exhaust valve, and corresponding cam face is changed to: in compression stroke, crank forwards lower dead center to, intake cam turns over β/2-ρ 1 angle again, and ρ 1 is the gap offset angle, and the cam follower contact begins lift, cam turns over (-β)/2+ ρ 2+ ρ 1 again, ρ 2 is gap offset angles, and the cam follower contact arrives the cam base circle position, and all the other are constant.
The workflow of one of measure of the present invention (1) is: the minimum volume of setting cylinder is V1, and maximum volume is V2,1, in the aspirating stroke, and when charge volume is V3, IC Intake Valve Closes, the working medium of V3 expand into V2 earlier; 2, in the compression stroke, working medium is compressed to V1 by V2; 3, in the expansion stroke, working medium expand into V2 from V1; 4, in the exhaust stroke, working medium is from V2 to V1, and combustion gas is finished a work done circulation.
The workflow of one of measure of the present invention (2) is: 1, in the aspirating stroke cylinder volume by V1 to V2,2, in the compression stroke, when the cylinder volume is V3, IC Intake Valve Closes, unnecessary gas is discharged from intake valve.Gas is compressed to V1 from V3; 3, in the expansion stroke, working medium expand into V2 from V1; 4, in the exhaust stroke, working medium is from V2 to V1, and combustion gas is finished a work done circulation.
The workflow of one of measure of the present invention (3) is: 1, in the aspirating stroke cylinder volume by V1 to V2,2, in the compression stroke, crank turns over lower dead center, exhaust valve is opened.When the cylinder volume is V3, exhaust valve closing, unnecessary gas is discharged from exhaust valve.Gas is compressed to V1 from V3; 3, in the expansion stroke, working medium expand into V2 from V1; 4, in the exhaust stroke, working medium is from V2 to V1, and combustion gas is finished a work done circulation.
Main points of the present invention are, by adjusting the maximum volume V2 and the minimum volume V1 of cylinder, expansion ratio V2/V1 are increased, and by changing cam face, change the port timing of inlet and exhaust valve, and the working medium volume that makes effective compression is V3, V1＜V3＜V2, compression ratio V3/V1.
Advantage of the present invention is obvious, and by changing the shape of cam, control is the working medium of compression effectively, the control compression ratio; By adjusting the maximum volume V2 and the minimum volume V1 of cylinder, expansion ratio V2/V1 is increased, reach the purpose that increases the conversion of motor hot merit.The present invention to existing start to improve little, simple and practical.
Description of drawings:
The former reciprocating internal combustion engine pv diagram of Fig. 1, wherein P0 is a barometric pressure.
Fig. 2 corrective measure of the present invention (1) internal combustion engine machine pv diagram.
Fig. 3 corrective measure of the present invention (2) (3) internal-combustion engine pv diagram.
Embodiment:
Be provided with a petrol engine, maximum volume V2 is 1.6 liters, and minimum volume V1 is 0.2 liter, and compression ratio=expansion ratio=8 now are improved to: V1=0.2 liter, V2=3.4 liter, expansion ratio=17.
The mode of control compression ratio has one of following measures: 1, suction stroke, crank turns over the top dead center an angle of 90 degrees, when cylinder volume V3=1.6 rises, and IC Intake Valve Closes, gas expand into V2 by V3, recompress V1, corresponding cam face is changed to: in aspirating stroke, crank forwards top dead center to, intake cam turns over 45+ ρ degree again, ρ is the gap offset angle, and the cam follower contact arrives the cam base circle position, and all the other are constant.2, compression stroke, crank turns over the lower dead center an angle of 90 degrees, the cylinder volume is V3=1.6 when rising, IC Intake Valve Closes, and unnecessary gas is discharged from intake valve, corresponding cam face is changed to: in compression stroke, crank forwards lower dead center to, and intake cam turns over 45+ ρ degree again, and ρ is the gap offset angle, the cam follower contact arrives the cam base circle position, and all the other are constant; 3, compression stroke, crank turns over lower dead center 10 degree, exhaust valve is opened, crank turns over the lower dead center an angle of 90 degrees, the cylinder volume is the V3=1.6 liter, exhaust valve closing, unnecessary gas is discharged from exhaust valve, and corresponding cam face is changed to: in compression stroke, crank forwards lower dead center to, intake cam turns over 5-ρ 1 degree again, and ρ 1 is the gap offset angle, and the cam follower contact begins lift, cam turns over 40+ ρ 2+ ρ 1 again, ρ 2 is gap offset angles, and the cam follower contact arrives the cam base circle position, and all the other are constant.Compression ratio is controlled to be 8.
Expansion ratio increases, and hot merit transforms to be increased.At Fig. 2, dash area W1-W2 area transforms for the hot merit that increases among Fig. 3.
Claims (1)
1, a kind of method that realizes increasing reciprocal internal-combustion engine expansion ratio and control compression ratio, by adjusting the maximum volume V2 of cylinder, with minimum volume V1, expansion ratio V2/V1 is increased,, change the port timing of inlet and exhaust valve by changing cam face, the working medium volume that makes effective compression is V3, V1＜V3＜V2, compression ratio V3/V1 adapts to and takes one of following measures: 1, suction stroke, crank turns over top dead center angle, 0＜＜180, during cylinder volume V3, IC Intake Valve Closes, gas expand into V2 by V3, recompress V1, corresponding cam face is changed to: in aspirating stroke, crank forwards top dead center to, intake cam turns over /2+ ρ angle again, ρ is the gap offset angle, and the cam follower contact arrives the cam base circle position, and all the other are constant; 2, compression stroke, crank turns over lower dead center angle, and 0＜＜180 are when the cylinder volume is V3, IC Intake Valve Closes, unnecessary gas is discharged from intake valve, and corresponding cam face is changed to: in compression stroke, crank forwards lower dead center to, intake cam turns over /2+ ρ angle again, ρ is the gap offset angle, and the cam follower contact arrives the cam base circle position, and all the other are constant; 3, compression stroke, crank turns over lower dead center β angle,-＜β＜, 0＜＜180, exhaust valve is opened, and crank turns over lower dead center angle, the cylinder volume is V3, exhaust valve closing, unnecessary gas is discharged from exhaust valve, and corresponding cam face is changed to: in compression stroke, crank forwards lower dead center to, intake cam turns over β/2-ρ 1 angle again, and ρ 1 is the gap offset angle, and the cam follower contact begins lift, cam turns over (-β)/2+ ρ 2+ ρ 1 again, ρ 2 is gap offset angles, and the cam follower contact arrives the cam base circle position, and all the other are constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410014910 CN1696481A (en) | 2004-05-11 | 2004-05-11 | Method for implementing increment of expansion ratio of reciprocating intermal-combustion engine and control of compression ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410014910 CN1696481A (en) | 2004-05-11 | 2004-05-11 | Method for implementing increment of expansion ratio of reciprocating intermal-combustion engine and control of compression ratio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1696481A true CN1696481A (en) | 2005-11-16 |
Family
ID=35349351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410014910 Pending CN1696481A (en) | 2004-05-11 | 2004-05-11 | Method for implementing increment of expansion ratio of reciprocating intermal-combustion engine and control of compression ratio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1696481A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101641506A (en) * | 2006-09-08 | 2010-02-03 | N·A·阿塔拉 | Device and method for increasing the efficiency of an internal combustion engine |
| CN103335686A (en) * | 2013-07-16 | 2013-10-02 | 上海交通大学 | Method and device for measuring volume of engine cylinder dynamically |
| CN107923322A (en) * | 2015-09-03 | 2018-04-17 | 日立汽车系统株式会社 | The control method of the compression ratio adjustment device of internal combustion engine and the compression ratio adjustment device of internal combustion engine |
| CN110295996A (en) * | 2019-06-14 | 2019-10-01 | 郝凤成 | Two stroke straight-shaft internal-combustion engine of swing arm cam-type |
-
2004
- 2004-05-11 CN CN 200410014910 patent/CN1696481A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101641506A (en) * | 2006-09-08 | 2010-02-03 | N·A·阿塔拉 | Device and method for increasing the efficiency of an internal combustion engine |
| CN103335686A (en) * | 2013-07-16 | 2013-10-02 | 上海交通大学 | Method and device for measuring volume of engine cylinder dynamically |
| CN107923322A (en) * | 2015-09-03 | 2018-04-17 | 日立汽车系统株式会社 | The control method of the compression ratio adjustment device of internal combustion engine and the compression ratio adjustment device of internal combustion engine |
| CN110295996A (en) * | 2019-06-14 | 2019-10-01 | 郝凤成 | Two stroke straight-shaft internal-combustion engine of swing arm cam-type |
| CN110295996B (en) * | 2019-06-14 | 2022-02-11 | 郝凤成 | Swing arm cam type two-stroke straight shaft internal combustion engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2347108B1 (en) | An exhaust arrangement for an internal combustion engine | |
| KR101390770B1 (en) | Turbocharged downsized compression cylinder for a split-cycle engine | |
| CN102383892B (en) | Variable air valve lift mechanism of internal combustion engine | |
| CN201162550Y (en) | Diesel engine electro-hydraulic control variable gas distribution device | |
| CN101749121A (en) | Engine intake quantity control apparatus | |
| CN1748076A (en) | Compressed engine working on a late clising miller cycle | |
| CN104040152A (en) | Method for shutting off and activating a cylinder of an internal combustion engine | |
| CN101201009A (en) | Engine valve timing and lift continuously variable system | |
| JP2004211699A (en) | Four-cycle reciprocating internal combustion engine | |
| CN105888816A (en) | Method for increasing air-fuel ratio of engine and supercharged engine | |
| CN101387228B (en) | Engine with compression ratio variable piston | |
| CN1696481A (en) | Method for implementing increment of expansion ratio of reciprocating intermal-combustion engine and control of compression ratio | |
| KR20200120807A (en) | 2 cycle engine with valve system and method for controled the engine | |
| RU2327885C1 (en) | Method of four-stroke internal conbustion engine operation and device to this effect | |
| AU2003248974B2 (en) | Improvements in or relating to reciprocating piston engines | |
| CN103328788A (en) | An internal combustion engine and a method of operation of an internal combustion engine | |
| CN109854324A (en) | A kind of Variable tumble gasoline engine combustion system | |
| RU2206775C1 (en) | Method of control and operation of gasoline internal combustion engine | |
| JPH07269381A (en) | Variable compression ratio engine | |
| RU2817075C1 (en) | Method of controlling intake and exhaust for four-stroke engine | |
| JP4842181B2 (en) | engine | |
| CN1477295A (en) | Two-stroke internal combustion engine with opposed piston arrangement | |
| CN2479227Y (en) | Improved internal combustion engine | |
| CN2316471Y (en) | Cylinder head for IC engine | |
| CN112879155A (en) | Valve type air inlet two-stroke engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |