CN1037011A - Internal-combustion engine becomes the length of connecting rod variable compression ratio device - Google Patents
Internal-combustion engine becomes the length of connecting rod variable compression ratio device Download PDFInfo
- Publication number
- CN1037011A CN1037011A CN88101975A CN88101975A CN1037011A CN 1037011 A CN1037011 A CN 1037011A CN 88101975 A CN88101975 A CN 88101975A CN 88101975 A CN88101975 A CN 88101975A CN 1037011 A CN1037011 A CN 1037011A
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- China
- Prior art keywords
- compression ratio
- connecting rod
- change
- length
- combustion engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/04—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads with elastic intermediate part of fluid cushion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/06—Adjustable connecting-rods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2360/00—Engines or pumps
- F16C2360/22—Internal combustion engines
Abstract
A kind of reciprocating internal combustion engine length of connecting rod capable of automatic changing that is used for, thereby the device of change compression ratio.Feature of the present invention is the position of control break compression ratio, be selected in simple in structure, the bigger crankshaft-link rod in space that allow to use.And, changing length of connecting rod changing compression ratio, used energy can be stored with the elastic force of spring.In power stroke, discharge again, improved efficient.The present invention changes piston, adjusts the method for compression ratio, and simple in structure, cost is low.Simple in manufacturing process, easy to maintenance.Both can be used for the manufacturing of new machine, also can be used for the transformation of old type.
Description
The invention belongs to technical field of internal combustion engines.Be one and in each circulation, change the technology that length of connecting rod changes compression ratio automatically.
In technical field of internal combustion engines, compression ratio is a considerable parameter.It directly affects the efficient and the discharging of motor.People change combustion-chamber shape by employing for many years, increase precombustion chamber and stratified charge, and advanced persons' such as improvement igniting or oil spout various technical measures improve compression ratio, realize lean burn technology, discharge with reducing in the hope of fuel saving.But the raising that it is found that compression ratio is limited.Compression ratio improves too much, will produce many unfavorable factors, does not reach its intended purposes on the contrary.So compression ratio is having a declining tendency again in recent years.Engine operation condition complexity in addition, the excursion of mixed gas air/fuel ratio is very big, in order to adapt to this situation, in order to overcome the unfavorable factor after compression ratio improves, changeable compression ratio technique occurred.
As: " Fo2B 75/04 US4515114 8705655 " (patent documentation circular 87 years No 3.67 pages) (Fo2B 75/04 JP60-65231 8703166) (patent documentation circular 87 years No 2.67 pages) or the like.In above-mentioned patent, the former changes piston, makes it be in compressive state in compression stroke, is in swelling state during exhaust stroke.The latter is the position by wrist pin, changes compression ratio.And " Fo2B 75/04 JP60-65234 8703169 " (patent documentation circular, No was 2.67 pages in 87 years) patent uses oil pressure to change compression ratio.
Above-mentioned every change compression ratio technique has bigger defective, thereby its practical application is restricted.
1. the position that becomes the compression ratio selection is inappropriate.Piston is the critical component of internal-combustion engine, and its production technology is original just very complicated.If the employing changeable compression ratio technique can change piston or wrist pin.To bring very big difficulty to manufacturing, keeping in repair so.
2. strength problem.Piston is that stress is bigger, and complicated parts.And, be subjected to the restriction in cylinder barrel space.If adopted variable piston or variable piston pin, be difficult to guarantee enough intensity.So just brought reliability, the problem in working life.
3. economic benefit is little.The technology of above-mentioned change compression ratio does not change the combustion process of internal-combustion engine.Adopt its resulting cost/benefit ratio, than the resulting cost of the advanced technology/benefit ratio that adopts other kind, much bigger.
Modern technologies pass through to adopt precombustion chamber, stratified charge, and tissue advances, squish stream, technical measures such as fuel injection can increase substantially compression ratio and air fuel ratio.But, simultaneously maximum explosive pressure and maximum combustion temperature are had increased significantly.So just give the soft property of internal combustion engine, NO
XDischarging, and factor such as mechanical strength have brought adverse influence.
Purpose of the present invention, be to provide a kind of: in each internal combustion engine circulation, by automatic change length of connecting rod, and compression ratio is changed, improve the combustion process of internal-combustion engine, under high compression ratio, lower maximum explosive pressure is arranged, lower maximum combustion temperature, and the energy that when changing length of connecting rod and compression ratio, is consumed, in the mid-term of work done, the technology that discharges again.
Accompanying drawing 1 is the front view of a kind of scheme of the invention process.Be applicable to quartastroke engine
Accompanying drawing 2 is its sectional drawings.Ⅰ-Ⅰ
Accompanying drawing 3 is its two sectional drawings.Ⅱ-Ⅱ Ⅲ-Ⅲ
Referring to accompanying drawing, the 1st, the top of variable connecting rod, the 2nd, the bottom of variable connecting rod, the 3rd, fastening screw trip bolt, the 4th, tightening nut, the 5th, the fastening cover of the first half, the 6th, Strong Steel leaf spring, the 7th, pad, the 8th, first half oil leab, the 9th, Lower Half oil leab.
The working principle of this example is as follows: after aspirating stroke begins, because the pressure in the cylinder is lower than the elastic force of spring 6, make system be in the state of high compression ratio.After compression stroke began, because the pressure in the cylinder still can not overcome 6 elastic force, system still was in the state of high compression ratio.Compression ignite or light after, when difficulty was bought the stern and revealed this entangled Mian seal 5 of combustion and force to peck to closely question difficulty to buy the elastic force of Υ bamboo in the cylinder, because bent axle is still in that to promote connecting rod up, spring was compressed, connecting rod begins to shorten, compression ratio descends.Maximum explosive pressure and temperature, and the rate of pressure rise
DP D ψAll fallen.Cross atdc, enter power stroke, cylinder pressure begins to reduce.Pressure in cylinder, when being lower than the elastic force of spring, the elastic force that spring 6 is stored can begin to discharge.This in a flash, the speed that inner pressure of air cylinder reduces is slack-off, but the pressure that acts on the bent axle do not reduce, the speed of the descending rotation of bent axle is not affected, the time lengthening of pressure effect.This just makes the efficient of internal-combustion engine increase many.
Traditional engine cycle can be explained with two-dimentional P-V indicator card. Wherein implying a condition, that is exactly crank angle and P.V. Two parameters are to change synchronously. The invention enables crank angle and PBetween two parameters of V, no longer be synchronous variation, asynchronous situation occurred. Therefore, indicator card can only be with P.V. ψ .(ψ crank angle) three-dimensional indicator card represents, operation cycle also only have could be correct with graphics description.
This example of the present invention has selected connecting rod as controlling object.Its structure tube list allows the space of use bigger, and intensity can be strengthened, and the reliability height is made, and is easy to maintenance.Brute spring 6 is critical components of this example, select for use according to different engine types.To be not less than 18-24kg/cm to petrol engine
2Start to control elastic force.Can be according to different requirements, thickness, the sheet number of decision spring 6.
Referring to accompanying drawing, the first half 1 and Lower Half 2 fastening covers 5 require to closely cooperate.It mainly is the variation that reduces noise and adapt to the connecting rod internal stress.Adjust pad 7, i.e. the pretightening force of can regulate 6 can determine to control the cylinder pressure of starting point.
The present invention has improved combustion process, has prolonged the action time of effective pressure, and raising compression ratio that can be by a relatively large margin uses weak mixture, and in load variations, during the burning rich mixture, it is soft work, discharges and also can reduce.
The present invention can be suitable for various internal-combustion engines.Not only can be applied on the internal combustion engine, also can be used for the transformation of existing internal-combustion engine.And the method for transformation is simple, and cost is not high.
The present invention can use the spring of other kind instead with 6, and the cylinder pressure point that the control compression ratio changes, before changing into compression ignite or lighting.Make compression ratio at compression ignite or before lighting, just change.
Claims (4)
1, a kind of comprising, adjustable length crankshaft-link rod, the device of brute spring; Its major character is that connecting rod is divided into two-part up and down, and connects with fastening screw, according to the pressure in the cylinder, by the deformation of brute spring, makes the length of connecting rod change, and causes that compression ratio changes.
2, according to the device of claim 1, it is characterized in that: the change of compression ratio, near top dead center, carry out, change the merit that compression ratio is done, can be stored in the spring with elastic force.In power stroke, above-mentioned elastic force can will discharge.
3, according to the device of claim 1, it is characterized in that: the initial cylinder pressure that the control compression ratio changes, can be by increasing, subtract, the pad investigation.
4, according to the device of claim 1, it is characterized in that: 6 can use other kind spring instead, and compression ratio was changed before compression ignite or ignition point, perhaps change at compression ignite or after lighting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN88101975A CN1037011A (en) | 1988-04-15 | 1988-04-15 | Internal-combustion engine becomes the length of connecting rod variable compression ratio device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN88101975A CN1037011A (en) | 1988-04-15 | 1988-04-15 | Internal-combustion engine becomes the length of connecting rod variable compression ratio device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1037011A true CN1037011A (en) | 1989-11-08 |
Family
ID=4831968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN88101975A Pending CN1037011A (en) | 1988-04-15 | 1988-04-15 | Internal-combustion engine becomes the length of connecting rod variable compression ratio device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1037011A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101046174B (en) * | 2006-06-09 | 2013-03-06 | 霍继龙 | Internal combustion engine with changeable compression ratio |
| CN103410609A (en) * | 2013-04-18 | 2013-11-27 | 慕建国 | Engine crankshaft connecting rod set with variable stroke |
| CN103670729A (en) * | 2013-12-24 | 2014-03-26 | 重庆交通大学 | Variable connecting rod type VCR engine connecting rod mechanism |
| CN104963935A (en) * | 2015-05-05 | 2015-10-07 | 苏犁 | Cylinder type internal combustion engine retractable connecting rod |
| CN108331792A (en) * | 2017-01-18 | 2018-07-27 | 伊希欧1控股有限公司 | Control has the hydraulic module and connecting rod of the hydraulic fluid stream of the connecting rod of the internal combustion engine of variable compression ratio |
| CN109281756A (en) * | 2017-07-19 | 2019-01-29 | 大众汽车有限公司 | The method of internal combustion engine and operation internal combustion engine |
| WO2020078083A1 (en) * | 2018-10-19 | 2020-04-23 | 广州宏大动力科技有限公司 | Internal combustion engine and design and fabrication method therefor |
-
1988
- 1988-04-15 CN CN88101975A patent/CN1037011A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101046174B (en) * | 2006-06-09 | 2013-03-06 | 霍继龙 | Internal combustion engine with changeable compression ratio |
| CN103410609A (en) * | 2013-04-18 | 2013-11-27 | 慕建国 | Engine crankshaft connecting rod set with variable stroke |
| CN103670729A (en) * | 2013-12-24 | 2014-03-26 | 重庆交通大学 | Variable connecting rod type VCR engine connecting rod mechanism |
| CN103670729B (en) * | 2013-12-24 | 2015-11-25 | 重庆交通大学 | Variable linkage type VCR engine link mechanism |
| CN104963935A (en) * | 2015-05-05 | 2015-10-07 | 苏犁 | Cylinder type internal combustion engine retractable connecting rod |
| CN108331792A (en) * | 2017-01-18 | 2018-07-27 | 伊希欧1控股有限公司 | Control has the hydraulic module and connecting rod of the hydraulic fluid stream of the connecting rod of the internal combustion engine of variable compression ratio |
| US10746199B2 (en) | 2017-01-18 | 2020-08-18 | ECO Holding 1 GmbH | Hydraulic module for controlling a hydraulic fluid flow of a connecting rod for an internal combustion engine with variable compression and a connecting rod |
| CN108331792B (en) * | 2017-01-18 | 2021-04-02 | 伊希欧1控股有限公司 | Hydraulic module for controlling the hydraulic fluid flow of a connecting rod of an internal combustion engine with variable compression ratio, and connecting rod |
| CN109281756A (en) * | 2017-07-19 | 2019-01-29 | 大众汽车有限公司 | The method of internal combustion engine and operation internal combustion engine |
| CN109281756B (en) * | 2017-07-19 | 2021-03-30 | 大众汽车有限公司 | Internal combustion engine and method for operating an internal combustion engine |
| WO2020078083A1 (en) * | 2018-10-19 | 2020-04-23 | 广州宏大动力科技有限公司 | Internal combustion engine and design and fabrication method therefor |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |