CN208982133U - A kind of exhaust cam shaft of Atkinson cycle - Google Patents
A kind of exhaust cam shaft of Atkinson cycle Download PDFInfo
- Publication number
- CN208982133U CN208982133U CN201820925339.6U CN201820925339U CN208982133U CN 208982133 U CN208982133 U CN 208982133U CN 201820925339 U CN201820925339 U CN 201820925339U CN 208982133 U CN208982133 U CN 208982133U
- Authority
- CN
- China
- Prior art keywords
- exhaust cam
- cam shaft
- angle
- atkinson cycle
- exhaust
- 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.)
- Expired - Fee Related
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The exhaust cam shaft of the utility model Atkinson cycle, including exhaust cam shaft and the exhaust cam being connected on exhaust cam shaft, exhaust cam molded line includes sequentially connected basic circle section, opens breeze way, valve opening section, closing flank, closes breeze way；The angle of the valve opening section is 0 ° to 54.5 °, and corresponding open side lift is 8.3535 to 0.3651mm；The angle for opening breeze way is 54.5 ° to 75 °, and corresponding open side lift is 0.3651 to 0mm；The angle of the closing flank is 0 ° to 54.5 °, and corresponding close side lift is 8.3535 to 0.4322mm；The angle for closing breeze way is 54.5 ° to 78 °, and corresponding close side lift is 0.4322 to 0mm.The delay that the utility model can complete exhaust valve is opened, cooperate the admission cam shaft based on Atkinson cycle, late exhaust valve is completed to open, the expansion ratio of engine is set to be greater than compression ratio, to realize engine Atkinson cycle, engine thermal efficiency is improved, the pumping loss of fuel consumption rate and engine low load region is reduced.
Description
Technical field
The utility model relates to the components of engine, in particular to a kind of exhaust cam shaft of Atkinson cycle.
Background technique
Since internal combustion engine generates, it always is the main power source of automobile.Increasingly with current Energy situation
Severe and environmental protection consciousness reinforcement, country propose more harsh oil consumption emission regulation to internal combustion engine, this promotes
Each power assembly company constantly releases the automobile power assembly of various new technologies.Atkinson cycle technology has to natural aspiration
The advantage that engine thermal efficiency and fuel economy improve, it has also become the concern hot technology of each company.
Existing engine, the overwhelming majority are all made of Otto cycle.Otto cycle naturally aspirated engine, there are underloads
When, the high disadvantage of fuel consumption rate.It is limited under current domestic communication environment, in engine use process, overwhelming majority work exists
Low-load region, this causes Otto engine fuel consumption rate high.Meanwhile passing through the Otto of throttle control air inflow
Cycle engine also results in the pump gas energy loss of part, this is an importance for causing fuel oil to waste.
Summary of the invention
The purpose of this utility model is to design a kind of exhaust cam shaft of new Atkinson cycle, completes prolonging for exhaust valve
It opens late, cooperates the admission cam shaft based on Atkinson cycle, complete late exhaust valve and open, keep the expansion ratio of engine big
In compression ratio, to realize engine Atkinson cycle, engine thermal efficiency is improved, fuel consumption rate is reduced and engine is low
The pumping loss of load area.
The utility model to achieve the above object the technical solution adopted is that: a kind of exhaust cam of Atkinson cycle
Axis, including exhaust cam shaft and the exhaust cam being connected on exhaust cam shaft, exhaust cam molded line includes sequentially connected base
Circle section opens breeze way, valve opening section, closing flank, closes breeze way；The angle of the valve opening section be 0 ° extremely
54.5 °, corresponding open side lift is 8.3535 to 0.3651mm；The angle for opening breeze way is 54.5 ° to 75 °, right
The open side lift answered is 0.3651 to 0mm；The angle of the closing flank is 0 ° to 54.5 °, corresponding close side lift
It is 8.3535 to 0.4322mm；The angle for closing breeze way is 54.5 ° to 78 °, and corresponding close side lift is 0.4322
To 0mm.
The further technical solution of the utility model is: one end end face of exhaust cam shaft is equipped with dowel hole, with exhaust
Cam axial end is plane, and the exhaust cam shaft axis hole center of circle is origin, each cam vertex of exhaust cam shaft and dowel hole center
The angle at line interval is respectively as follows: 40 °, 130 °, 50 °, 140 °.
The further technical solution of the utility model is: the base radius of the exhaust cam is 17.5mm.
The further technical solution of the utility model is: exhaust cam molded line lift is as follows:
The exhaust cam shaft of the utility model Atkinson cycle has the following beneficial effects: using the utility model Aunar
The exhaust cam shaft of Jin Sen circulation can realize that inlet valve late release and the delay of exhaust valve are opened, and keep the expansion ratio of engine big
In compression ratio, to realize engine Atkinson cycle, engine thermal efficiency is improved, fuel consumption rate is reduced and engine is low
The pumping loss of load area.
The exhaust cam shaft of the utility model Atkinson cycle is made further with reference to the accompanying drawings and examples
It is bright.
Detailed description of the invention
Fig. 1 is the exhaust cam shaft structure schematic diagram of the utility model Atkinson cycle；
Fig. 2 is Fig. 1 A direction view；
Fig. 3 is the molded line structure schematic diagram of exhaust cam.
Drawing reference numeral explanation: 1- first is to exhaust cam, and 2- second is to exhaust cam, and 3- third is to exhaust cam, 4- the
Four pairs of exhaust cams, 5- dowel hole, 6- dowel hole center line.
Specific embodiment
As shown in Figure 1 to Figure 3, the exhaust cam shaft of the utility model Atkinson cycle, including exhaust cam shaft and company
The exhaust cam on exhaust cam shaft is connect, four pairs of exhaust cams are arranged in the utility model altogether, and each exhaust cam cam profile is equal
It unanimously, is 0 ° by top of first pair of exhaust cam, camshaft, which rotates clockwise, to be positive, and first pair of exhaust cam is each with remaining
Separately angle is respectively 90 °, 270 °, 180 ° to exhaust cam in order.One end end face of exhaust cam shaft is equipped with positioning pin
Hole.
Exhaust cam molded line includes sequentially connected basic circle section, opens breeze way, valve opening section, closing flank, pass
Close breeze way.Definition θ is exhaust cam angle, and h is admission cam lift, and the base radius of exhaust cam is 17.5mm.It is described
The angle of valve opening section is 0 ° to 54.5 °, and corresponding open side lift is 8.3535 to 0.3651mm；The unlatching buffering
The angle of section is 54.5 ° to 75 °, and corresponding open side lift is 0.3651 to 0mm；The angle of the closing flank be 0 ° extremely
54.5 °, corresponding close side lift is 8.3535 to 0.4322mm；The angle for closing breeze way is 54.5 ° to 78 °, right
The close side lift answered is 0.4322 to 0mm.
Using exhaust cam axial end as plane, the exhaust cam shaft axis hole center of circle is origin, each cam vertex of exhaust cam shaft
With dowel hole centreline space every angle be respectively as follows: 40 °, 130 °, 50 °, 140 °.The cam vertex of i.e. first pair exhaust cam
With dowel hole centreline space every angle be respectively 40 °, the cam vertex of second pair of exhaust cam and dowel hole center line
The angle at interval is respectively 130 °, third to the cam vertex of exhaust cam and dowel hole centreline space every angle be respectively
50 °, the cam vertex of the 4th pair of exhaust cam and dowel hole centreline space every angle be respectively 140 °.
Exhaust cam molded line is as follows: in the lift of corresponding angle
When the exhaust cam shaft work of the utility model Atkinson cycle, Atkinson cycle should be based on corresponding
Admission cam shaft match, complete inlet valve late release, late exhaust valve open.The direction of arrow F is that air inlet is convex in Fig. 3
Take turns the direction of rotation.
Claims (4)
1. a kind of exhaust cam shaft of Atkinson cycle, convex including exhaust cam shaft and the exhaust being connected on exhaust cam shaft
Wheel, which is characterized in that exhaust cam molded line includes sequentially connected basic circle section, opens breeze way, valve opening section, valve-closing
Section closes breeze way；The angle of the valve opening section be 0 ° to 54.5 °, corresponding open side lift be 8.3535 to
0.3651mm；The angle for opening breeze way is 54.5 ° to 75 °, and corresponding open side lift is 0.3651 to 0mm；It is described
The angle of closing flank is 0 ° to 54.5 °, and corresponding close side lift is 8.3535 to 0.4322mm；The closing breeze way
Angle be 54.5 ° to 78 °, corresponding close side lift be 0.4322 to 0mm.
2. the exhaust cam shaft of Atkinson cycle as described in claim 1, which is characterized in that one end end of exhaust cam shaft
Face is equipped with dowel hole, and using exhaust cam axial end as plane, the exhaust cam shaft axis hole center of circle is origin, and exhaust cam shaft is each convex
Wheel vertex and dowel hole centreline space every angle be respectively as follows: 40 °, 130 °, 50 °, 140 °.
3. the exhaust cam shaft of Atkinson cycle as described in claim 1, which is characterized in that the basic circle of the exhaust cam
Radius is 17.5mm.
4. the exhaust cam shaft of Atkinson cycle as described in claim 1, which is characterized in that exhaust cam molded line lift is such as
Following table:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820925339.6U CN208982133U (en) | 2018-06-14 | 2018-06-14 | A kind of exhaust cam shaft of Atkinson cycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820925339.6U CN208982133U (en) | 2018-06-14 | 2018-06-14 | A kind of exhaust cam shaft of Atkinson cycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208982133U true CN208982133U (en) | 2019-06-14 |
Family
ID=66779082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820925339.6U Expired - Fee Related CN208982133U (en) | 2018-06-14 | 2018-06-14 | A kind of exhaust cam shaft of Atkinson cycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208982133U (en) |
-
2018
- 2018-06-14 CN CN201820925339.6U patent/CN208982133U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20190614 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |