CN207598699U - A kind of connecting rod adjustable structure - Google Patents
A kind of connecting rod adjustable structure Download PDFInfo
- Publication number
- CN207598699U CN207598699U CN201721572606.8U CN201721572606U CN207598699U CN 207598699 U CN207598699 U CN 207598699U CN 201721572606 U CN201721572606 U CN 201721572606U CN 207598699 U CN207598699 U CN 207598699U
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- China
- Prior art keywords
- connecting rod
- positioning device
- oil circuit
- watt
- big end
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Abstract
The utility model is related to a kind of connecting rod adjustable structure, including con-rod only, small end of connecting rod and big end；Oil circuit is provided on big end, first connecting rod watt and second connecting rod watt are provided on big end；There are two positioning device, two positioning devices are both secured on big end and first connecting rod watt for setting on big end, be provided on second connecting rod watt with the one-to-one locking hole of positioning device, positioning device is movable mating with second connecting rod watt respectively.To ensure that engine obtains higher compression ratio under the conditions of large torque and relatively high power, the connecting rod positioning device of engine is controlled by engine oil pressure, being unlocked to reach rational compression ratio for the stop up and down of bent axle rotation is utilized respectively, saving fuel oil consumption improves discharge capacity.
Description
Technical field
The utility model belongs to technical field of engines, particularly relates to a kind of connecting rod adjustable structure.
Background technology
Internal combustion engine is to introduce a fuel into cylinder interior, by the mixing of fuel and air, realizes the burning of cylinder interior,
The thermal energy for generation of burning is converted into the power plant of mechanical energy.This burning can generate larger high pressure gas, in pole
Acting is completed under the action of tool expansion.Changeable compression ratio technique refers to change cylinder interior minimum cylinder volume, so as to adjust engine
Compression ratio.
Internal combustion engine is converted using the thermal energy in cylinder, by the expansion of combustion gas, generates piston past
Multiple inertia motion, is transmitted to connecting rod, bent axle, and most mechanical energy is converted at last.The compression ratio of internal combustion engine refers to cylinder total volume
It, can be to compression by adjusting combustion chamber volume since cylinder total volume is usually changeless the ratio between with combustion chamber volume
Than being adjusted.Diesel engine compression ratio general range is between 12 to 22, and normal modern gasoline machine compression ratio is 6 to 10 or so.
Engine compression ratio refers generally to cylinder total volume and combustion chamber volume ratio, is the important ginseng of measured engine performance
Number.When engine compresses are higher, the air pressure and temperature when compression ends in cylinder are higher, conducive to catching fire for fuel,
The cold-start performance and combustibility of engine are preferable, but maximum combustion pressure and the rate of pressure rise can also increase therewith at this time,
So that the work of engine becomes rough, so as to increase N0 in combustion processXProduction rate and discharge capacity.If compression is compared
Low, the pressure and temperature of cylinder air is relatively low when compression ends can cause aeroperformance and combustibility to be deteriorated, so as to cause
Fuel consumption rate increases.Therefore, engine compression ratio needs to consider that various influence factors carry out compromise and determine.
Changeable compression ratio technique research starting is early.Nineteen fifty-two British Internal Combustion Engine Research Institute begin one's study variable compression ratio work
Plug.The former Soviet Union is in tractor research institute progress compression ratio variable diesel engine experiment the 1980s, it was demonstrated that the technology can have
Effect improves the economy of part load engine.
The main application of changeable compression ratio technique on the engine in recent years：What Shen Bao companies of Sweden developed in 2000
5 cylinder variable compression ratio engines of 1.6L discharge capacities realize the change of control compression ratio by making the change in location of engine cylinder cover
Turn to 8-14；The compression ratio variation range of variable compression ratio engine model machine that certain Japanese company developed in 2005 is 8-
14, the combustibility of engine is good, and the product of the more equal discharge capacity of fuel consumption has decreased by 30%, and at engine
It also can stable operation in high EGR (gas recirculation system) rate.
The compression ratio of engine is usually what can not be changed, because combustion chamber volume and the swept volume parameter of cylinder are all
Fixed value.In order to make to start function to play better efficiency in various operating modes, changeable compression ratio technique (VCR) is by become
Improve the runnability of engine to the mode of change.As engine energy-saving emission reduction is increasing in recent years, using can
Ratios technology becomes more and more effective method.
It is the pot type piston link mechanism of the prior art as shown in Figure 1, including con-rod only 01 and is set to con-rod only
The small end of connecting rod 02 at both ends and big end 03, and it is provided with what is overlapped with the center of the big end on big end 03
First connecting hole 05 is provided with the second connecting hole 04 overlapped with the center of small end of connecting rod on small end of connecting rod 02, the structure
Link mechanism is fixed-type, and after length of connecting rod is fixed, engine compression ratio is fixed so that engine compression ratio is generally relatively low, no
The fuel economy and emission performance of engine can maximumlly be optimized according to engine operating condition.
Utility model content
The purpose of this utility model is to provide a kind of connecting rod adjustable structure, to improve the fuel economy of engine and row
Put performance.
The utility model is achieved through the following technical solutions：
Including con-rod only, small end of connecting rod is provided in the upper end of the con-rod only for a kind of connecting rod adjustable structure,
The lower end of the con-rod only is provided with big end；
The first connecting hole overlapped with the center of the small end of connecting rod is provided on the small end of connecting rod；In the connecting rod
The second connecting hole overlapped with the center of the big end is provided on major part；
The first oil circuit, the second oil circuit, third oil circuit and the 4th oil circuit are provided on the big end；
First connecting rod watt and second connecting rod watt are provided in second connecting hole, the diameter of the second connecting rod watt is small
In the diameter of the first connecting rod watt；
Positioning device there are two being oppositely arranged in second connecting hole, respectively the first positioning device and the second positioning
Device, two positioning devices are both secured on the big end and the first connecting rod watt, in the second connecting rod watt
On be provided with the one-to-one locking hole of the positioning device, the positioning device is movable with the second connecting rod watt respectively
It is mating；
One end of first oil circuit and second oil circuit is connect with control valve；One end of the third oil circuit and institute
The first oil circuit connection is stated, the other end is connect with first positioning device；One end of 4th oil circuit and second oil circuit
Connection, the other end are connect with second positioning device.
The lateral wall of the first connecting rod watt is fixedly connected with the madial wall of second connecting hole.
The positioning device includes positioning device ontology, retaining spring and positioning pin；The positioning device ontology is shell
Shape structure, one end of the retaining spring are fixed in the positioning device ontology, and the other end is fixed with the positioning pin；
Oil circuit import, one end and the positioning of the third oil circuit or the 4th oil circuit are provided in the positioning device
The oil circuit import connection of device.
The beneficial effects of the utility model are：
By providing a kind of simple variable compression ratio link mechanism, variable compression ratio can improve starts the technical program
The fuel economy and emission performance of machine.
Description of the drawings
Fig. 1 is prior art engine connecting rod structure schematic diagram；
Fig. 2 is the utility model connecting rod adjustable structure front view；
Fig. 3 is the A-A sectional views of Fig. 2；
Fig. 4 is positioning device schematic diagram.
Reference sign
01 con-rod only, 02 small end of connecting rod, 03 big end, 04 second connecting hole, 05 first connecting hole, 1 con-rod only,
2 smalls end of connecting rod, 3 big ends, 4 first connecting rods watt, 5 second connecting rods watt, 6 first oil circuits, 7 second oil circuits, 8 first positioning dresses
It puts, 9 second positioning devices, 10 third oil circuits, 11 the 4th oil circuits, 21 first connecting holes, 31 second connecting holes, 81 positioning devices
Ontology, 82 retaining springs, 83 positioning pins.
Specific embodiment
The technical solution of the utility model is described in detail by the following examples, following embodiment is only exemplary
, it is only capable of for explanation and illustration the technical solution of the utility model, and be not to be construed as to technical solutions of the utility model
Limitation.
The application provides a kind of connecting rod adjustable structure, as shown in Figure 1 to Figure 3, including con-rod only 1, in con-rod only
Upper end be provided with small end of connecting rod 2, the lower end of con-rod only is provided with big end 3.
The first connecting hole 21 overlapped with the center of small end of connecting rod is provided on small end of connecting rod 2；It is set on big end 3
It is equipped with the second connecting hole 31 overlapped with the center of big end.
The first oil circuit 6, the second oil circuit 7,10 and the 4th oil circuit 11 of third oil circuit are provided on big end 3.
It is provided with first connecting rod watt 4 and second connecting rod watt 5 in the second connecting hole 31, the diameter of second connecting rod watt is less than the
The diameter of one connecting rod bearing shell.
It is oppositely arranged in the second connecting hole there are two positioning device, respectively the first positioning device 8 and the second positioning fills
9 are put, two positioning devices are both secured on big end and first connecting rod watt, are provided on second connecting rod watt and positioning device
One-to-one locking hole, positioning device are movable mating with second connecting rod watt respectively.
One end of first oil circuit and the second oil circuit is connect with control valve；One end of third oil circuit and the first oil circuit connection,
The other end is connect with the first positioning device；One end of 4th oil circuit and the second oil circuit connection, the other end and the second positioning device connect
It connects.
The lateral wall of first connecting rod watt is fixedly connected with the madial wall of the second connecting hole.
First positioning device is identical with the structure of the second positioning device, and the first positioning device 8 includes positioning device ontology
81st, retaining spring 82 and positioning pin 83；Positioning device ontology is shell construction, and positioning device sheet is fixed in one end of retaining spring
In vivo, the other end is fixed with positioning pin.
Be provided with oil circuit import in positioning device, the oil circuit of one end and positioning device of third oil circuit or the 4th oil circuit into
Mouth connection.
The technical program is to be adjusted to eccentric wheel structure by positioning device by first connecting rod watt, forms two director's degree not
Same connecting rod is that the entire motion process of piston forms two different effective travels and then influences compression ratio.
To ensure that engine obtains higher compression ratio under the conditions of large torque and relatively high power, the connecting rod of engine is determined
Position device is controlled by engine oil pressure, is utilized respectively being unlocked to reach rational compression ratio for the stop up and down that bent axle rotates,
Saving fuel oil consumes, and improves discharge capacity.
Specifically control method is：
Under nominal operating conditions, since engine oil pressure control valve is not turned on, oil circuit cannot effectively drive fixed on connecting rod
Position device is opened, length of connecting rod locking, and length of connecting rod participates in engine with regular length and works, and engine pressure is relatively low at this time.
Under big compression ratio operating mode, since crankshaft oil-way is by the first oil circuit to the 4th oil circuit, it is fixed to respectively enter first
Position device and the second positioning device, effectively drive positioning device, and positioning device is opened.At this point, since bent axle continues to rotate fortune
Dynamic to carry out, eccentric stiffener stress generates deflection；When position is rotated at the second positioning device at the first positioning device, connecting rod
Again it is locked up, connecting rod enters long lift mode at this time, so as to improve the compression ratio of engine.
The utility model has carried out detailed explanation by preferred embodiment.However, by studying carefully above,
Variation and increase to each embodiment are also apparent to those of ordinary skill in the art.It is intended that institute
There are these to change and increase all to fall in the range protected in the utility model claims.
Claims (3)
1. a kind of connecting rod adjustable structure, which is characterized in that including con-rod only, the upper end of the con-rod only is provided with company
Bar microcephaly is provided with big end in the lower end of the con-rod only；
The first connecting hole overlapped with the center of the small end of connecting rod is provided on the small end of connecting rod；In the big end
On be provided with the second connecting hole overlapped with the center of the big end；
The first oil circuit, the second oil circuit, third oil circuit and the 4th oil circuit are provided on the big end；
First connecting rod watt and second connecting rod watt are provided in second connecting hole, the diameter of the second connecting rod watt is less than institute
State the diameter of first connecting rod watt；
It is oppositely arranged in second connecting hole there are two positioning device, respectively the first positioning device and the second positioning fill
It puts, two positioning devices are both secured on the big end and the first connecting rod watt, on the second connecting rod watt
Be provided with the one-to-one locking hole of the positioning device, the positioning device respectively with the second connecting rod watt it is movable insert
Connect cooperation；
One end of first oil circuit and second oil circuit is connect with control valve；One end of the third oil circuit and described the
One oil circuit connection, the other end are connect with first positioning device；One end of 4th oil circuit and second oil circuit connection,
The other end is connect with second positioning device.
2. connecting rod adjustable structure according to claim 1, which is characterized in that the lateral wall of the first connecting rod watt and institute
The madial wall for stating the second connecting hole is fixedly connected.
3. connecting rod adjustable structure according to claim 1, which is characterized in that the positioning device includes positioning device
Ontology, retaining spring and positioning pin；The positioning device ontology is shell construction, and one end of the retaining spring is fixed on described
In positioning device ontology, the other end is fixed with the positioning pin；
Oil circuit import, one end and the positioning device of the third oil circuit or the 4th oil circuit are provided in the positioning device
Oil circuit import connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721572606.8U CN207598699U (en) | 2017-11-22 | 2017-11-22 | A kind of connecting rod adjustable structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721572606.8U CN207598699U (en) | 2017-11-22 | 2017-11-22 | A kind of connecting rod adjustable structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207598699U true CN207598699U (en) | 2018-07-10 |
Family
ID=62759887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721572606.8U Expired - Fee Related CN207598699U (en) | 2017-11-22 | 2017-11-22 | A kind of connecting rod adjustable structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207598699U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109441963A (en) * | 2018-12-16 | 2019-03-08 | 中国航发沈阳发动机研究所 | A kind of length and angle adjustment structure |
-
2017
- 2017-11-22 CN CN201721572606.8U patent/CN207598699U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109441963A (en) * | 2018-12-16 | 2019-03-08 | 中国航发沈阳发动机研究所 | A kind of length and angle adjustment structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180710 Termination date: 20201122 |