CN106523061A - Camshaft of valve timing mechanism of gasoline engine - Google Patents
Camshaft of valve timing mechanism of gasoline engine Download PDFInfo
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- CN106523061A CN106523061A CN201510570173.1A CN201510570173A CN106523061A CN 106523061 A CN106523061 A CN 106523061A CN 201510570173 A CN201510570173 A CN 201510570173A CN 106523061 A CN106523061 A CN 106523061A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 13
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 241000580063 Ipomopsis rubra Species 0.000 description 1
- 208000007623 Lordosis Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention provides a camshaft of a valve timing mechanism of a gasoline engine. The camshaft comprises a camshaft body. A timing gear is arranged on the camshaft body. The maximum lift h of a gas inlet cam of the camshaft body is 6.88 mm, the minimum cam tip radius is 13 mm, the cam corner interval corresponding to the valve closing section of the gas inlet cam is 0-70 degrees, and the corresponding lift h is 0.00085-6.88 mm; and the cam corner interval corresponding to the valve opening section of the gas inlet cam is 0-79 degrees, and the corresponding lift is 0.02-6.88 mm. The maximum lift h of an exhaust cam of the camshaft body is 7.95 mm, the minimum cam tip radius is 13 mm, the cam corner interval corresponding to the exhaust cam valve closing section of an exhaust camshaft is 0-79 degrees, the corresponding lift is 0.0005-7.95 mm, the cam corner interval corresponding to the exhaust cam valve opening section of the exhaust cam is 0-92 degrees, and the corresponding lift is 0.001-7.95 mm. The camshaft of the valve timing mechanism of the gasoline engine is provided, the performance of the engine is improved, and meanwhile the service life of the engine can be prolonged.
Description
Technical field
The present invention relates to gasoline engine field of gas distribution, particularly relates to a kind of gasoline engine valve actuating mechanism camshaft.
Background technology
Four strokes of quartastroke engine are respectively air-breathing, compression, acting and instroke；Either overhead-cam design puts camshaft structure with, or the internal combustion engine of downwards-placed cam axle construction be all by cam profile come realize control inlet and exhaust valve opening and closing, so the design of cam profile is finally all reflected in the opening and closing of inlet and exhaust valve.
Simultaneously, the camshaft molded line of the valve actuating mechanism used by automobile engine inlet and outlet is related to fullness coefficient, charging efficiency, the speed of valve opening and closing and acceleration, the shear stress of valve spring of cam, the contact stress of cam and tappet, so as to directly affect engine output, output torque and oil consumption, the service life of valve actuating mechanism, burn adequacy and vibrating noise etc..In today that energy prices skyrocket and consumer is harsh to vehicle performance requirement, each manufacturer is devoted to studying that engine output is higher, oil consumption is lower, the admission cam shaft that service life is longer.
A kind of gasoline engine valve actuating mechanism camshaft is occurred in that on the market at present, maximum lift h of the admission cam of the camshaft is 6.58mm, minimum nose radius is 13mm, it is 0-93 ° that the corresponding cam angle of closing flank of the admission cam is interval, corresponding lift h is 6.58m-0.0012mm, it is 0-99 ° that the corresponding cam angle of valve opening section of the admission cam is interval, and corresponding lift is 6.58mm～0.002mm；
Maximum lift h of the exhaust cam of the camshaft is 6.06mm, minimum nose radius is 13mm, it is 0～99 ° that the corresponding cam angle of exhaust cam closing flank of the exhaust cam shaft is interval, corresponding lift is 6.06mm～0.002mm, it is 0-97 ° that the corresponding cam angle of exhaust cam valve opening section of the exhaust cam shaft is interval, and corresponding lift is 6.06mm～0.0036mm.There is following defect in the camshaft：Under prolonged working condition, engine power declines, while engine emission does not reach requirement, electromotor overall performance is low, and the life-span is reduced；
Simultaneously, current camshaft is in order to pursue more preferable output torque, can be by the way of cam lift be improved, but this mode can cause the decrement of valve spring to increase, affect the life-span of spring, this mode nose radius can reduce simultaneously, this can cause cam and the contact stress of tappet to increase, the abrasion of increase cam and tappet, the service life of cam can also be reduced, so increase in moment of torsion seeking a kind of balance and the camshaft life-span between, so that camshaft can have the problem that longer service life is that camshaft field is studied always under the situation that moment of torsion is increased again.
The content of the invention
The present invention proposes a kind of gasoline engine valve actuating mechanism camshaft, in the case where cost is not increased, change electromotor distribution surrounding time come adjust the open and close time of inlet and outlet cam so as to reach improve electromotor performance, while the life-span of electromotor can also be extended.
The technical scheme is that what is be achieved in that：A kind of gasoline engine valve actuating mechanism camshaft, including cam shaft body, timing gears are provided with the cam shaft body, maximum lift h of the admission cam of the cam shaft body is 6.88mm, minimum nose radius is 13mm, and it is 0-70 ° that the corresponding cam angle of closing flank of the admission cam is interval, and corresponding lift h is 6.88m-0.00085mm, it is 0-79 ° that the corresponding cam angle of valve opening section of the admission cam is interval, and corresponding lift is 6.88mm～0.02mm；
Maximum lift h of the exhaust cam of the cam shaft body is 7.95mm, minimum nose radius is 13mm, it is 0～79 ° that the corresponding cam angle of exhaust cam closing flank of the exhaust cam shaft is interval, corresponding lift is 7.95mm～0.0005mm, it is 0-92 ° that the corresponding cam angle of exhaust cam valve opening section of the exhaust cam is interval, and corresponding lift is 7.95mm～0.001mm.
Further, the angle between the convex closure top of the timing marks and exhaust cam of the timing gears is 7 ° 30 '～8 ° 30 ', and the angle between the convex closure top of the exhaust cam and the convex closure top of admission cam is 109 ° 30 '～110 ° 30 '.
The invention has the beneficial effects as follows：In the case where cost is not increased, change the surrounding time of distribution of electromotor the open and close time of inlet and outlet cam being adjusted so as to reach the performance of electromotor；Loading onto existing cam shaft power on same electromotor increases, discharges reduction.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, accompanying drawing to be used needed for embodiment or description of the prior art will be briefly described below, apparently, drawings in the following description are only some embodiments of the present invention, for those of ordinary skill in the art, without having to pay creative labor, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is the structural representation of the camshaft of the present invention；
Fig. 2 is the structural representation of admission cam of the present invention；
Fig. 3 is the structural representation of exhaust cam of the present invention；
Fig. 4 is the right view of the present invention；
Fig. 5 is the structural representation of C-C in Fig. 1.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.Based on the embodiment in the present invention, the every other embodiment obtained under the premise of creative work is not made by those of ordinary skill in the art belongs to the scope of protection of the invention.
Referring to a kind of gasoline engine valve actuating mechanism camshaft shown in Fig. 1 to Fig. 5, including cam shaft body, timing gears are provided with the cam shaft body, maximum lift h of the admission cam 7 of the cam shaft body is 6.88mm, minimum nose radius is 13mm, it is 0-70 ° that the 1 corresponding cam angle of closing flank of the admission cam 7 is interval, corresponding lift h is 6.88m-0.00085mm, it is 0-79 ° that the 2 corresponding cam angle of valve opening section of the admission cam 7 is interval, and corresponding lift is 6.88mm～0.02mm；
Maximum lift h of the exhaust cam 6 of the cam shaft body is 7.95mm, minimum nose radius is 13mm, it is 0～79 ° that 1 ' the corresponding cam angle of exhaust cam closing flank of the exhaust cam shaft is interval, corresponding lift is 7.95mm～0.0005mm, it is 0-92 ° that 2 ' the corresponding cam angle of exhaust cam valve opening section of the exhaust cam 6 is interval, and corresponding lift is 7.95mm～0.001mm.
Further, the angle 3 between the convex closure top of the timing marks of the timing gears and exhaust cam 5 is 7 ° 30 '～8 ° 30 ', and the angle 4 between the convex closure top of the exhaust cam 6 and the convex closure top of admission cam 7 is 109 ° 30 '～110 ° 30 '.This arrangement ensure that port timing.
Such as following table and improvement lordosis wheel shaft and camshaft relevant experimental data of the present invention：
Can learn from form present invention decreases the angle of valve opening section and closing section, valve is made to close rapidly and open, be conducive to improving charging efficiency, air inlet effect is more preferable, peak power output is made to improve percent 4 or so, engine fuel consumption quantity is reduced, while moment of torsion also improves about percent 4 or so, the air-fuel ratio of electromotor is close to (14.7 in preferable region:1).Meanwhile, (HC+NOX) brake specific exhaust emission be 7.24g/KW.h, compared to the 7.28g/KW.h before improvement, also significantly reduced.
The present invention is not in the case where cost is increased, the surrounding time of distribution of electromotor is changed the open and close time of inlet and outlet cam is adjusted so as to reach the performance of electromotor, is realized and is loaded onto existing cam shaft power increase, discharge reduction on same electromotor；Lift is improved by camshaft, increases air inlet and capacity in the cylinder unit time, so as to improve torque；Camshaft lift is high and opening angle big (149 degree of air inlet, 171 degree of aerofluxuss), guarantee mixed gas are more smooth into cylinder inlet and outlet；This product is unanimously high, does not increase cost under the same conditions.
The advantage and beneficial effect of apparatus of the present invention：Compared to the camshaft used in current manufacturer, not increasing any production cost, realizing and change existing camshaft power ascension in the case of same electromotor, discharge after existing camshaft being changed in the case of same electromotor is reduced；The performance of electromotor can be reached simultaneously on the dual-purpose electromotor of oil, gas；The concordance of electromotor and the service life of electromotor is improved, it is same to overall performance raising to enter to reduce the cost of whole machine；
The corresponding relation subordinate list of intake and exhaust cam profile line cam rotational angle theta (θ 1) and lift h (h1) is as follows：
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, made etc., be should be included within the scope of the present invention.
Claims (2)
1. a kind of gasoline engine valve actuating mechanism camshaft, including cam shaft body, is arranged in the cam shaft body
There are timing gears, it is characterised in that：Maximum lift h of the admission cam of the cam shaft body is
6.88mm, minimum nose radius be 13mm, the corresponding cam of closing flank (1) of the admission cam
It is 0-70 ° that corner is interval, and corresponding lift h is 6.88m-0.00085mm, the valve of the admission cam
It is 0-79 ° to open the corresponding cam angle of section (2) interval, and corresponding lift is 6.88mm～0.02mm；
Maximum lift h of the exhaust cam of the cam shaft body is 7.95mm, and minimum nose radius is
13mm, the corresponding cam angle of exhaust cam closing flank (1 ') of the exhaust cam shaft it is interval for 0～
79 °, corresponding lift be 7.95mm～0.0005mm, the exhaust cam valve opening of the exhaust cam
Open the corresponding cam angle of section (2 ') interval for 0-92 °, corresponding lift is 7.95mm～0.001mm.
2. gasoline engine valve actuating mechanism camshaft according to claim 1, it is characterised in that the timing
Angle (3) between the timing marks (5) of gear (8) and the convex closure top of exhaust cam be 7 ° 30 '～
8 ° 30 ', the angle (4) between the convex closure top of the exhaust cam and the convex closure top of admission cam is
109 ° 30 '～110 ° 30 '.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510570173.1A CN106523061A (en) | 2015-09-09 | 2015-09-09 | Camshaft of valve timing mechanism of gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510570173.1A CN106523061A (en) | 2015-09-09 | 2015-09-09 | Camshaft of valve timing mechanism of gasoline engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106523061A true CN106523061A (en) | 2017-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510570173.1A Pending CN106523061A (en) | 2015-09-09 | 2015-09-09 | Camshaft of valve timing mechanism of gasoline engine |
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| Country | Link |
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| CN (1) | CN106523061A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943037A (en) * | 2010-09-17 | 2011-01-12 | 天津大学 | Dual-peak exhaust camshaft |
| CN202370602U (en) * | 2011-12-19 | 2012-08-08 | 力帆实业(集团)股份有限公司 | Camshaft structure |
| CN103397921A (en) * | 2013-07-02 | 2013-11-20 | 广西玉柴机器股份有限公司 | Engine camshaft cam |
| CN203296843U (en) * | 2013-04-27 | 2013-11-20 | 东风朝阳朝柴动力有限公司 | Camshaft with valve overlap angle being 0 |
| CN204126681U (en) * | 2014-09-24 | 2015-01-28 | 宁波捷成轴业有限公司 | A kind of assembled camshaft |
| CN204511548U (en) * | 2015-03-12 | 2015-07-29 | 重庆凯特动力科技有限公司 | Petrol engine distribution device exhaust cam shaft |
| CN204511547U (en) * | 2015-03-12 | 2015-07-29 | 重庆凯特动力科技有限公司 | Petrol engine intake and exhaust cam axle combines |
| CN205078311U (en) * | 2015-09-09 | 2016-03-09 | 重庆凯驰汽车部件制造有限公司 | Gasoline engine valve timing mechanism camshaft |
-
2015
- 2015-09-09 CN CN201510570173.1A patent/CN106523061A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943037A (en) * | 2010-09-17 | 2011-01-12 | 天津大学 | Dual-peak exhaust camshaft |
| CN202370602U (en) * | 2011-12-19 | 2012-08-08 | 力帆实业(集团)股份有限公司 | Camshaft structure |
| CN203296843U (en) * | 2013-04-27 | 2013-11-20 | 东风朝阳朝柴动力有限公司 | Camshaft with valve overlap angle being 0 |
| CN103397921A (en) * | 2013-07-02 | 2013-11-20 | 广西玉柴机器股份有限公司 | Engine camshaft cam |
| CN204126681U (en) * | 2014-09-24 | 2015-01-28 | 宁波捷成轴业有限公司 | A kind of assembled camshaft |
| CN204511548U (en) * | 2015-03-12 | 2015-07-29 | 重庆凯特动力科技有限公司 | Petrol engine distribution device exhaust cam shaft |
| CN204511547U (en) * | 2015-03-12 | 2015-07-29 | 重庆凯特动力科技有限公司 | Petrol engine intake and exhaust cam axle combines |
| CN205078311U (en) * | 2015-09-09 | 2016-03-09 | 重庆凯驰汽车部件制造有限公司 | Gasoline engine valve timing mechanism camshaft |
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