CN205669418U - A kind of Atkinson circulates type range extender engine admission cam shaft - Google Patents
A kind of Atkinson circulates type range extender engine admission cam shaft Download PDFInfo
- Publication number
- CN205669418U CN205669418U CN201620473590.4U CN201620473590U CN205669418U CN 205669418 U CN205669418 U CN 205669418U CN 201620473590 U CN201620473590 U CN 201620473590U CN 205669418 U CN205669418 U CN 205669418U
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- CN
- China
- Prior art keywords
- admission cam
- atkinson
- range extender
- type range
- air inlet
- 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.)
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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 utility model discloses a kind of Atkinson and circulate type range extender engine admission cam shaft, particular design is carried out for admission cam molded line, air inlet duration wrap angle sigma is 280CA, 50CA is increased than the air inlet duration cornerite of the admission cam of prior art Central Plains machine Otto circulation, electromotor effective compression ratio is changed by increasing air inlet capacity of returns, to separate compression ratio and expansion ratio, it is achieved extended-range electric vehicle type range extender engine Atkinson circulates.Admission cam active section, breeze way use asymmetric design, and active section uses segmentation acceleration function, and constant speed function is accelerated in breeze way employing etc..Relevant parameter is optimized on kinesiology and dynamical foundation meeting, make it relative to former machine, the most unimpeded, run more steady, under conditions of ensureing that valve and piston are not interfered, coordinate compression ratio to increase, significantly reduce extended-range electric vehicle Atkinson and circulate extended-range electromotor specific fuel consumption.
Description
Technical field
This utility model relates to the type range extender engine admission cam shaft of a kind of stroke-increasing electric automobile, is specifically related to one
Atkinson circulates type range extender engine admission cam shaft.
Background technology
The strictest fuel economy regulation requires that vehicle has higher economy, from different technology path schemes,
Hybrid-power electric vehicle is to overcome current power battery defect, to pure electric automobile transition, it is achieved field of traffic energy-conserving and environment-protective
Best-of-breed technology scheme.In automobile engine, most of thermodynamic cycles use Alto to circulate at present.This circulation is with its power
The most of driving conditions of sexual satisfaction, thus be widely used on most of vehicular engine.
The short slab of Alto circulation is its thermal efficiency.Typical Alto cycle engine is due to its bent axle and valve timing
Design, fixes its compression equal to than expansion ratio.After Alto loop concept is invented, James Atkinson has invented a kind of non-
Symmetrical crankshaft structure allows expansion ratio more than compression ratio, named " Atkinson circulation ".But owing to Atkinson circulates phase
Ratio Alto circulation power output deficiency, so be left in the basket for a long time on Vehicular internal combustion engine.But oil and electricity hybrid vehicle
Promote, make Atkinson circulation again be paid attention to, utilize motor to compensate the deficiency of power output.Therefore Atkinson follows
Ring application on internal combustion engine is taken seriously.
Sacrifice dynamic property due to Atkinson circulation and exchanged the higher thermal efficiency for, make Atkinson circulation be particularly suitable for
Application in type range extender engine, on fixing ISG motor demand power operating point, can quickly realize the electronic vapour of extended-range
The ultralow oil consumption of car and the target of discharge.And in different mechanisms realizes the arrangement of Atkinson circulation, change distribution phase
Position is to separate compression ratio and expansion ratio in the round-robin basis of former machine Alto, it is achieved the technical side that Atkinson cycle cost is minimum
Case.
Summary of the invention
This utility model cannot realize expansion ratio more than compression ratio to overcome former machine valve actuating mechanism and toggle
Inherent limitations, it is provided that a kind of Atkinson circulates type range extender engine admission cam shaft, increases pressure by new air inlet phase
The air inlet capacity of returns of contracting stroke incipient stage, changes former machine effective compression ratio, makes expansion ratio be more than effective compression ratio to reduce increasing
Journey device engine consumption.
In order to achieve the above object, this utility model is by the following technical solutions:
A kind of Atkinson circulates type range extender engine admission cam shaft, including axis body, axle journal and admission cam, described in enter
The air inlet duration cornerite of gas cam is 280CA, and admission cam shaft directly drives inlet valve to be opened lift to maximum lift by 0mm
Corresponding cam angle is 140CA, maximum lift to distance 0mm the cam angle closing lift is 140CA.
Further, described admission cam base circle diameter (BCD) is 37mm, and cam profile maximum lift is 8.5mm.
Further, described admission cam is when the idle reference position of VVT OCV Oil Control Valve, and air inlet angle of advanced opening is
3CA BTDC, it is 97CA ABDC that evening is closed angle in air inlet.
Further, described Atkinson circulation type range extender engine admission cam shaft is arranged on stroke-increasing electric automobile
In type range extender engine.
The utility model has the advantage of:
More former machine Otto of the prior art circulates, and this utility model is convex by the air inlet with big air inlet duration cornerite
Wheel coordinates late intake to close angular phasing evening, increases compression stroke air inlet capacity of returns, separates compression ratio and expansion ratio, increases and expand
Ratio, makes more heat energy be converted into mechanical energy to improve the thermal efficiency.Optimize cam design parameter, it is ensured that engine induction stroke
In, there is preferable valve motion rule, air inlet is more unimpeded, runs more steadily, is effectively improved camshaft service life,
Reduce valve crash speed, valve noise is reduced further.
Atkinson cycle applications in type range extender engine, is being met ISG motor demand power by this utility model
In the case of, significantly reduce electromotor specific fuel consumption to improve Fuel Economy, quickly realize stroke-increasing electric automobile ultralow
Oil consumption and the target of discharge.
Accompanying drawing explanation
The utility model will be further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of this utility model Atkinson circulation type range extender engine admission cam shaft；
Fig. 2 is A-A direction admission cam sectional view in Fig. 1.
Detailed description of the invention
The technical solution of the utility model it is discussed in detail below in conjunction with accompanying drawing:
As it is shown in figure 1, a kind of Atkinson circulates type range extender engine admission cam shaft, it is adapted for mount on extended-range electricity
In the type range extender engine of electrical automobile.Admission cam shaft includes axis body, axle journal and some admission cams.Show admission cam
Molded line structure, its air inlet duration wrap angle sigma is 280CA, than the air inlet of the admission cam of prior art Central Plains machine Otto circulation
Duration cornerite increases 50CA.Wherein, admission cam shaft drives inlet valve to be opened lift to corresponding to maximum lift by 0mm
Cam angle is 140CA, maximum lift to distance 0mm the cam angle closing lift is 140CA.Admission cam basic circle is straight
Footpath is 37mm, and cam profile maximum lift is 8.5mm.Admission cam, when the idle reference position of VVT OCV Oil Control Valve, enters
Gas angle of advanced opening is 3CA BTDC, and it is 97CA ABDC that evening is closed angle in air inlet.
The design of described admission cam includes that cam lifting curve and port timing design:
1. admission cam Profile Design:
The air inlet duration cornerite of described admission cam is 280CA.Active section, breeze way asymmetric design, active section is adopted
Designing with segmentation acceleration function, the design of constant speed function is accelerated in breeze way employing etc..The a diameter of 37mm of cam base circle, maximum lift
For 8.5mm.
And above-mentioned cam profile carried out kinetics and kinesiology check, and meet kinetics and kinematic on the basis of
Relevant parameter is optimized.
Check parameter includes: lubricating coefficient, admission cam and the tappet between valve motion rule, admission cam and tappet
Between the fullness coefficient of contact stress, open side and close side, minimum profile curvature radius, k-factor etc..
Processing technique needs ensure: the maximum lift deviation of admission cam is ± 0.03mm about nose,
Remaining lift portion is divided into ± 0.02mm.Cam profile also needs the angle meeting above-mentioned design and lift relation.
Bigger fullness coefficient: open side and close side are: 0.57；
Reasonably valve motion rule: maximum valve motion speed open side is less than less than 11.47m/s, close side
11.51m/s；
Good lubricating condition: lubricating coefficient: 0.39；
Reasonably k-factor: open side: 4.44, close side: 4.48；
Less contact stress: Max.contact stress is 331.9N/mm2；
Ensureing, in engine induction stroke, have preferable valve motion rule, air inlet is more unimpeded, runs more flat
Surely, it is effectively improved camshaft service life, reduces valve crash speed, valve noise is reduced further.
2. air inlet phase design:
Premised on reducing the pumping loss in air inlet reflux course to greatest extent, air inlet is selected to close angle evening.Calculate former machine
Effective compression ratio, on the basis of the geometrical compression ratio (10.5) of former machine, leaves suitable surplus, it is ensured that pinking does not occur.Determine VVT
Evening at the 1mm lift that the effective compression ratio of reference position is corresponding closes angle, calculates cam profile active section 0mm to 1mm lift, really
Determine to close angle and angle of advanced opening evening corresponding at 0mm lift, thus obtain the air inlet phase under 0mm lift: at VVT OCV Oil Control Valve not
During the reference position of work, air inlet angle of advanced opening is 3CA BTDC, and it is 97CA ABDC that evening is closed angle in air inlet.
By the admission cam of big air inlet duration cornerite, coordinate late intake to close angular phasing evening, increase compression stroke
Air inlet capacity of returns, separates compression ratio and expansion ratio, increases expansion ratio, makes more heat energy be converted into mechanical energy to improve thermal effect
Rate.
This utility model utilizes Atkinson to circulate in the application in type range extender engine, is meeting ISG motor demand merit
In the case of rate, significantly reduce electromotor specific fuel consumption to improve Fuel Economy, quickly realize stroke-increasing electric automobile
Ultralow oil consumption and the target of discharge.
Claims (4)
1. Atkinson circulates a type range extender engine admission cam shaft, and including axis body, axle journal and admission cam, its feature exists
In, the air inlet duration cornerite of described admission cam is 280CA, and admission cam shaft directly drives inlet valve to be opened lift by 0mm
Be 140CA to the cam angle corresponding to maximum lift, maximum lift to 0mm the cam angle closing lift is 140CA.
2. a kind of Atkinson as claimed in claim 1 circulates type range extender engine admission cam shaft, it is characterised in that described
Admission cam base circle diameter (BCD) is 37mm, and cam profile maximum lift is 8.5mm.
3. a kind of Atkinson as claimed in claim 1 circulates type range extender engine admission cam shaft, it is characterised in that described
Admission cam is when the idle reference position of VVT OCV Oil Control Valve, and air inlet angle of advanced opening is 3CA BTDC, and air inlet is closed angle and be evening
97CA ABDC。
4. a kind of Atkinson as claimed in claim 1 circulates type range extender engine admission cam shaft, it is characterised in that described
Atkinson circulation type range extender engine admission cam shaft is arranged in the type range extender engine of stroke-increasing electric automobile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620473590.4U CN205669418U (en) | 2016-05-23 | 2016-05-23 | A kind of Atkinson circulates type range extender engine admission cam shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620473590.4U CN205669418U (en) | 2016-05-23 | 2016-05-23 | A kind of Atkinson circulates type range extender engine admission cam shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205669418U true CN205669418U (en) | 2016-11-02 |
Family
ID=57194143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620473590.4U Expired - Fee Related CN205669418U (en) | 2016-05-23 | 2016-05-23 | A kind of Atkinson circulates type range extender engine admission cam shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205669418U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108397251A (en) * | 2018-02-12 | 2018-08-14 | 江铃汽车股份有限公司 | Admission cam and its Profile Design method |
| CN113202628A (en) * | 2021-06-02 | 2021-08-03 | 北京理工大学 | Two-stage low-compression-cycle implementation method, device and detection method |
-
2016
- 2016-05-23 CN CN201620473590.4U patent/CN205669418U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108397251A (en) * | 2018-02-12 | 2018-08-14 | 江铃汽车股份有限公司 | Admission cam and its Profile Design method |
| CN113202628A (en) * | 2021-06-02 | 2021-08-03 | 北京理工大学 | Two-stage low-compression-cycle implementation method, device and detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20161102 Termination date: 20200523 |