CN208502897U - Variable-compression-ratio piston and engine - Google Patents
Variable-compression-ratio piston and engine Download PDFInfo
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- CN208502897U CN208502897U CN201821126842.1U CN201821126842U CN208502897U CN 208502897 U CN208502897 U CN 208502897U CN 201821126842 U CN201821126842 U CN 201821126842U CN 208502897 U CN208502897 U CN 208502897U
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Abstract
The utility model discloses a kind of variable-compression-ratio piston and engines, wherein, the piston includes: leading truck, piston only and connector, wherein the bottom of the leading truck is provided with gear, the piston only is embedded in the leading truck, can be with the leading truck synchronous rotary, and can be gone up and down along the axial direction of leading truck, the connector is threadedly connected to the inside of the piston only, it is provided with piston pin on the connector, for connecting with crank link mechanism.The variable-compression-ratio piston realizes engine and can reduce the noise of engine in optimum condition under different operating conditions, extend the service life of engine.
Description
Technical field
The utility model relates to piston technical field, a kind of variable-compression-ratio piston and engine are specifically provided.
Background technique
When cylinder volume and piston motion when the compression ratio of engine refers to piston motion to lower dead center are to top dead centre
The ratio between volume of cylinder, compression ratio increase can effectively improve the performance and efficiency of engine.Because pressure rise can allow gas
Density become larger, intermolecular distance also just becomes smaller, and such fuel molecule and oxygen molecule distance are also just closer, and burning velocity is just more
Fastly；Temperature can allow gas molecule motion speed to be accelerated, and fuel molecule and oxygen molecule are easier to interact, this just allows mixing
Gas is easier to light.And lesser combustion space can complete to burn faster, and combustion process quickening also improves performance.
And excessively high compression ratio can make the frequency knocked increase, and high compression ratio puts forward higher want to the quality of fuel oil
It asks.To solve this problem, starts to turn to research emphasis in the research and development of variable compression ratio engine at present both at home and abroad, can be changed
Compression ratio engine is exactly to pass through control means, changes the compression ratio of engine in real time, so that engine is in middle-low load feelings
Under condition, the thermal efficiency and fuel economy of engine are improved using high compression ratio；Using low in the case where high load capacity
Compression ratio prevents the generation of pinking.
The realization of variable compression ratio of engines has many technical solution and related patents both at home and abroad at present, but all deposits mostly
In complicated in mechanical structure, variable compression ratio Numerical Control is difficult, be difficult to solve dynamic balancing and makes the volume and weight of engine
The problems such as increase, so that its development difficulty and cost greatly increase.
Therefore, a kind of novel variable-compression-ratio piston and engine are developed, people's urgent problem to be solved is become.
Utility model content
In consideration of it, the purpose of this utility model is to provide a kind of variable-compression-ratio piston and engine, it is existing to solve
Variable-compression-ratio piston complicated in mechanical structure, the problems such as part is various.
On the one hand the utility model provides a kind of variable-compression-ratio piston, comprising: leading truck, piston only and connection
Part, wherein the bottom of the leading truck is provided with gear, and the piston only is embedded in the leading truck, can lead with described
It to frame synchronous rotary, and can be gone up and down along the axial direction of leading truck, the connector is threadedly connected to the inside of the piston only, institute
It states and is provided with piston pin on connector, for being connect with crank link mechanism.
It is preferred that sliding slot there are two its axially symmetric settings of the outer lateral edge of the piston only, the two sides of the leading truck are set
It is equipped with the guide rod with sliding slot cooperation.
Further preferably, the variable-compression-ratio piston further includes the motor connecting with the gear, the motor it is defeated
Shaft is engaged with gear, for driving gear to rotate.
The utility model additionally provides a kind of engine, comprising: above-mentioned variable-compression-ratio piston and crank link mechanism,
In, the top of the crank link mechanism and the piston pin connection of variable-compression-ratio piston.
Variable-compression-ratio piston provided by the utility model can drive piston only synchronous rotary by rotary steering frame,
And then the compression ratio of piston is adjusted, so that engine can be reduced in optimum condition under different operating conditions by realizing engine
Noise, extend the service life of engine.
Detailed description of the invention
With reference to the accompanying drawing and embodiment is described in further detail the utility model:
Fig. 1 is the structural schematic diagram of variable-compression-ratio piston provided by the utility model；
Fig. 2 is the structural schematic diagram of leading truck；
Fig. 3 is the structural schematic diagram of piston only；
Fig. 4 is the structural schematic diagram of connector.
Specific embodiment
The utility model is further explained below in conjunction with specific embodiment, but limitation is not originally practical
It is novel.
As shown in Figures 1 to 4, the utility model provides a kind of variable-compression-ratio piston, comprising: leading truck 1, piston sheet
Body 2 and connector 3, wherein the bottom of the leading truck 1 is provided with gear 11, can be with by the driving unit that engages with gear
Leading truck rotation is controlled, the piston only 2 is embedded in the leading truck 1, can be with 1 synchronous rotary of leading truck, and it can
Along the axial direction lifting of leading truck 1, the connector 3 is threadedly connected to the inside of the piston only 2, specifically: the piston
It is provided with internal screw thread on the inside of ontology, the external screw thread with the screw-internal thread fit, the company are provided on the outside of the connector
Piston pin 31 is provided on fitting 3, for connecting with crank link mechanism 4.
In use process, which is equipped in cylinder 5, and the adjusting method of compression ratio is as follows: logical
It crosses external force band moving gear to rotate, and then leading truck synchronous rotary can be driven, the leading truck of rotation will be further driven to piston sheet
Body synchronous rotary, because connector cannot make rotating motion, therefore, piston only will opposite joints rise or fall, in turn
The compression ratio for adjusting piston, makes engine under different operating conditions all in optimum state, specifically: engine is in idling and low negative
When lotus is transported, driving leading truck rotation moves upwards piston only opposite joints, increases the compression ratio of piston, can make to send out
Motivation economy is fuel-efficient；When high engine load is transported, driving leading truck is reversely rotated, and transports piston only opposite joints downwards
It is dynamic, reduce the compression ratio of piston, the noise of engine can be reduced, extends the service life of engine.
As the improvement of technical solution, as shown in figure 3, the outer lateral edge of the piston only 2 its be axially and symmetrically provided with two
A sliding slot 21, as shown in Fig. 2, the two sides of the leading truck 1 are provided with the guide rod 12 with the sliding slot 21 cooperation.
In order to improve the Adjustment precision of compression ratio, as the improvement of technical solution, the variable-compression-ratio piston further include with
The motor that the gear 11 connects, the output shaft and gear 11 of the motor are cooperatively connected, for driving gear 11 to rotate.
The utility model additionally provides a kind of engine, comprising: above-mentioned variable-compression-ratio piston and crank link mechanism,
In, the top of the crank link mechanism and the piston pin 31 of variable-compression-ratio piston connect.
Specific embodiment of the present utility model is write according to progressive mode, and each embodiment party is highlighted
The difference of case, similar portion can be with cross-reference.
The embodiments of the present invention is elaborated above in conjunction with attached drawing, but the utility model is not limited to
Above embodiment can also not depart from the utility model within the knowledge of a person skilled in the art
Various changes can be made under the premise of objective.
Claims (4)
1. variable-compression-ratio piston characterized by comprising leading truck (1), piston only (2) and connector (3), wherein institute
The bottom for stating leading truck (1) is provided with gear (11), and the piston only (2) is embedded in the leading truck (1), can be with described
Leading truck (1) synchronous rotary, and the piston sheet can be threadedly connected to along the axial direction lifting of leading truck (1), the connector (3)
The inside of body (2) is provided with piston pin (31) on the connector (3), for connecting with crank link mechanism (4).
2. variable-compression-ratio piston described in accordance with the claim 1, it is characterised in that: the outer lateral edge of the piston only (2) its
Axially and symmetrically there are two sliding slot (21), the two sides of the leading truck (1) are provided with the guiding with the sliding slot (21) cooperation for setting
Bar (12).
3. according to variable-compression-ratio piston described in claim 1, it is characterised in that: further include the electricity being connect with the gear (11)
The output shaft of machine, the motor is engaged with gear (11), for driving gear (11) to rotate.
4. engine characterized by comprising variable-compression-ratio piston described in any one of claims 1 to 3 and crank connect
Linkage, wherein the top of the crank link mechanism and the piston pin (31) of variable-compression-ratio piston connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821126842.1U CN208502897U (en) | 2018-07-17 | 2018-07-17 | Variable-compression-ratio piston and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821126842.1U CN208502897U (en) | 2018-07-17 | 2018-07-17 | Variable-compression-ratio piston and engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208502897U true CN208502897U (en) | 2019-02-15 |
Family
ID=65289339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821126842.1U Active CN208502897U (en) | 2018-07-17 | 2018-07-17 | Variable-compression-ratio piston and engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208502897U (en) |
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2018
- 2018-07-17 CN CN201821126842.1U patent/CN208502897U/en active Active
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