CN204238995U - A kind of intake cam of supercharging directly jetting gasoline engine - Google Patents
A kind of intake cam of supercharging directly jetting gasoline engine Download PDFInfo
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- CN204238995U CN204238995U CN201420643790.0U CN201420643790U CN204238995U CN 204238995 U CN204238995 U CN 204238995U CN 201420643790 U CN201420643790 U CN 201420643790U CN 204238995 U CN204238995 U CN 204238995U
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- intake cam
- cam
- breeze way
- motor
- cam profile
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Abstract
This application discloses a kind of intake cam of supercharging directly jetting gasoline engine, the cam profile of described intake cam comprise valve opening side breeze way, the section of punching is worn in valve-closing side, active section and basic circle section; The cornerite of described active section is within the scope of 240 ° ~ 250 °; The angle of described valve opening side breeze way is 25 ° ~ 30 °, and breeze way height is at more than 0.15mm; The maximum lift H of described cam profile is in 5mm ~ 5.5mm.This intake cam obtains through overtesting, this intake cam can make motor in the speed range of 1500 ~ 4500r/min, keep the output of 350N.m moment of torsion, ensure that motor is under rated speed 5500r/min simultaneously, reach the design object of output power 155Kw, even if visible under low cruise, motor also can provide higher moment of torsion and power, reduce sluggish degree, improve the low-speed performance of motor.
Description
Technical field
The utility model relates to engine cam technical field, particularly a kind of intake cam of supercharging directly jetting gasoline engine
Background technique
The intake cam that petrol engine adopts directly is sprayed in current supercharging, when the slow-speed of revolution runs, there is the larger problem of response hysteresis, causes that low engine speed is unable, low speed acceleration is poor, affects the low-speed performance of motor.
Therefore, how to reduce the response of intake cam when low speed sluggish, improve low-speed performance, become those skilled in the art's problem demanding prompt solution.
Model utility content
In view of this, the purpose of this utility model is the intake cam providing a kind of supercharging directly jetting gasoline engine, sluggish to reduce the response of intake cam when low speed, improves low engine speed performance.
For achieving the above object, the utility model provides following technological scheme:
An intake cam for supercharging directly jetting gasoline engine, the cam profile of described intake cam comprises valve opening side breeze way, valve-closing side breeze way, active section and basic circle section;
The cornerite of described active section is within the scope of 230 ° ~ 240 °;
The angle of described valve opening side breeze way is 25 ° ~ 30 °, and breeze way height is at more than 0.15mm;
The maximum lift H of described cam profile is in 6mm ~ 6.5mm.
Preferably, in above-mentioned intake cam, the radius of described basic circle section is in 15mm ~ 17mm.
Preferably, in above-mentioned intake cam, the scope of the negative cruvature radius of described breeze way is 30mm ~ 40mm.
Preferably, in above-mentioned intake cam, the maximum positive acceleration of described cam profile is 50mm/rad
2~ 60mm/rad
2, positive acceleration width range is 40 ° ~ 50 °; The maximum deceleration of described cam profile is 20mm/rad
2~ 40mm/rad
2, negative acceleration width range is 50 ° ~ 60 °.
Compared with prior art, the beneficial effects of the utility model are:
In the intake cam of the supercharging directly jetting gasoline engine that the utility model provides, control within the scope of 230 ° ~ 240 ° by the cornerite of the active section by cam profile, the angle of valve opening side breeze way controls within the scope of 25 ° ~ 30 °, breeze way height is at more than 0.15mm, the maximum lift H of cam profile is within the scope of 6mm ~ 6.5mm, obtain through overtesting, this intake cam can make motor in the speed range of 1500 ~ 4500r/min, keep the output of 350N.m moment of torsion, ensure that motor is under rated speed 5500r/min simultaneously, reach the design object of output power 155Kw, even if visible under low cruise, motor also can provide higher moment of torsion and power, reduce sluggish degree, improve the low-speed performance of motor.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The structural representation of the cam profile of the intake cam of a kind of supercharging directly jetting gasoline engine that Fig. 1 provides for the utility model embodiment;
The polar coordinate representation schematic diagram of the cam profile of the intake cam of a kind of supercharging directly jetting gasoline engine that Fig. 2 provides for the utility model embodiment;
The valve side cam characteristic curve of the intake cam of a kind of supercharging directly jetting gasoline engine that Fig. 3 provides for the utility model embodiment;
The cam sub-attribute curve of the intake cam of a kind of supercharging directly jetting gasoline engine that Fig. 4 provides for the utility model embodiment.
In above-mentioned Fig. 1-Fig. 4,1 be valve opening side breeze way, 2 be active section, 3 be valve-closing side breeze way, 4 for basic circle section.
Embodiment
Core of the present utility model there is provided a kind of intake cam of supercharging directly jetting gasoline engine, reduces the response of intake cam when low speed sluggish, improves low engine speed performance.
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technological scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to Fig. 1 and Fig. 2, the utility model embodiment provides a kind of intake cam of supercharging directly jetting gasoline engine, and the cam profile of intake cam comprises valve opening side breeze way 1, valve-closing side breeze way 3, active section 2 and basic circle section 4; Wherein, the matching primitives that cam profile have employed distribution device and gas handling system unsteady flo w factor is theoretical, make the cornerite of active section 2 (b1 ~ b2 section namely in Fig. 1) control within the scope of 230 ° ~ 240 °, effectively utilize the dynamic effect of pressure wave to reduce air inlet back pressure; The angle of valve opening side breeze way 1 (a1 ~ b1 section namely in Fig. 1) is 25 ° ~ 30 °, breeze way height is at more than 0.15mm, cam profile adopts the design of negative cruvature radius in breeze way region, to increase the fullness coefficient of cam profile, the negative cruvature radius of breeze way range preferably from 30mm ~ 40mm, negative cruvature is too little, then affect the running stability of motor, therefore, while raising fullness coefficient, ensure the performance of motor and the output of oil consumption, negative cruvature is preferably set to above-mentioned scope; The maximum lift H of cam profile, in 6mm ~ 6.5mm, makes valve lift and Flow coefficient of inlet match, and takes into account low speed torque and the high-speed power of motor better, and the oil consumption level of motor.
Above-mentioned intake cam is obtained by test, this intake cam can make motor in the speed range of 1500 ~ 4500r/min, keep the output of 350N.m moment of torsion, ensure that motor is under rated speed 5500r/min simultaneously, reach the design object of output power 155Kw, even if visible under low cruise, motor also can provide higher moment of torsion and power, reduce sluggish degree, improve the low-speed performance of motor.
In the present embodiment, cam profile utilizes analysis software to control within the scope of 15 ~ 17mm by the radius of basic circle section 4, ensure that the working life of camshaft, also controls the friction torque of friction of cam shaft pair at minimum zone simultaneously.Certainly, above Base radius is optimal selection, and according to actual needs, Base radius can also get other numerical value, is not limited to above-mentioned scope.
In the present embodiment, the maximum positive acceleration of cam profile is 50mm/rad
2~ 60mm/rad
2, positive acceleration width range is 40 ° ~ 50 °; The maximum deceleration of described cam profile is 20mm/rad
2~ 40mm/rad
2, negative acceleration width range is 50 ° ~ 60 °, and so design can take into account the reinforcing degree of camshaft and larger charging efficiency.Relevant cam characteristic as shown in Figure 3 and Figure 4, in figure 3, curve A represents Valve Lift (valve lift) curve, curve B represents Spring Force (elastic force) curve, curve C represents Inertia Force (inertial force) curve, curve D represents Valve Acceleration (valve keying acceleration) curve, and curve E represents Valve Velocity (valve keying speed) curve; In the diagram, curve W represents Radius Of Cam Contour (radius of curvature of cam profile) curve, curve X exhibits Cam-Follower Contact Stress R (cam follower contact stress) curve, curve Y represents Cam-Follower Contact Stress O (cam follower contact stress) curve, and curve Z represents Cam-Follower lift (cam follower lift) curve.
Provide a kind of cam profile lift table of concrete intake cam in the present embodiment, wherein, the lift table of valve opening side is as shown in table 1:
Table 1 is cam profile opening side lift table
The lift table of valve-closing side is as shown in table 2:
Table 2 is cam profile closedown side lift table
Above-mentioned cam profile lift table is a kind of way of example, is not limited to the numerical value cited by above form.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (4)
1. an intake cam for supercharging directly jetting gasoline engine, the cam profile of described intake cam comprises valve opening side breeze way (1), valve-closing side breeze way (3), active section (2) and basic circle section (4);
It is characterized in that, the cornerite of described active section (2) is within the scope of 230 ° ~ 240 °;
The angle of described valve opening side breeze way (1) is 25 ° ~ 30 °, and breeze way height is at more than 0.15mm;
The maximum lift H of described cam profile is in 6mm ~ 6.5mm.
2. intake cam according to claim 1, is characterized in that, the radius of described basic circle section (4) is in 15mm ~ 17mm.
3. intake cam according to claim 2, is characterized in that, the scope of the negative cruvature radius of described breeze way is 30mm ~ 40mm.
4. intake cam according to claim 1, is characterized in that, the maximum positive acceleration of described cam profile is 50mm/rad
2~ 60mm/rad
2, positive acceleration width range is 40 ° ~ 50 °; The maximum deceleration of described cam profile is 20mm/rad
2~ 40mm/rad
2, negative acceleration width range is 50 ° ~ 60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420643790.0U CN204238995U (en) | 2014-10-31 | 2014-10-31 | A kind of intake cam of supercharging directly jetting gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420643790.0U CN204238995U (en) | 2014-10-31 | 2014-10-31 | A kind of intake cam of supercharging directly jetting gasoline engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204238995U true CN204238995U (en) | 2015-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420643790.0U Expired - Fee Related CN204238995U (en) | 2014-10-31 | 2014-10-31 | A kind of intake cam of supercharging directly jetting gasoline engine |
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| Country | Link |
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| CN (1) | CN204238995U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389651A (en) * | 2014-10-31 | 2015-03-04 | 力帆实业(集团)股份有限公司 | Inlet cam for supercharged direct injection gasoline engine |
| CN106837454A (en) * | 2017-03-23 | 2017-06-13 | 湖南长丰动力有限责任公司 | A kind of 1.5L is pressurized the exhaust cam of directly jetting gasoline engine |
-
2014
- 2014-10-31 CN CN201420643790.0U patent/CN204238995U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389651A (en) * | 2014-10-31 | 2015-03-04 | 力帆实业(集团)股份有限公司 | Inlet cam for supercharged direct injection gasoline engine |
| CN106837454A (en) * | 2017-03-23 | 2017-06-13 | 湖南长丰动力有限责任公司 | A kind of 1.5L is pressurized the exhaust cam of directly jetting gasoline engine |
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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 |
Granted publication date: 20150401 Termination date: 20191031 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |