CN201269110Y - Exhaust cam shaft of car engine - Google Patents
Exhaust cam shaft of car engine Download PDFInfo
- Publication number
- CN201269110Y CN201269110Y CNU2008200999218U CN200820099921U CN201269110Y CN 201269110 Y CN201269110 Y CN 201269110Y CN U2008200999218 U CNU2008200999218 U CN U2008200999218U CN 200820099921 U CN200820099921 U CN 200820099921U CN 201269110 Y CN201269110 Y CN 201269110Y
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- China
- Prior art keywords
- exhaust cam
- cam shaft
- exhaust
- camshaft
- lug boss
- 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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Abstract
The utility model discloses an exhaust cam shaft of an automobile engine; the front end of the cam shaft (1) is provided with a limiting lug boss (2); the shaft body of the cam shaft (1) is provided with four pairs of cams from front to back, namely a first exhaust cam (4), a second exhaust cam (5), a third exhaust cam (6) and a fourth exhaust cam (7); the backside of the limiting lug boss (2) is provided with a ring of convex edges (8); a ring-shaped card slot (9) is formed between the convex edges (8) and the limiting lug boss (2); the rear end of the cam shaft (1) is provided with a shaft journal (3) which forms a ring-shaped lug boss, and the diameter of the ring-shaped lug boss is larger than that of the shaft body of the cam shaft (1). The exhaust cam shaft of the automobile engine can adapt to VVT mechanism mounting under the premise of not changing the cylinder cover structure, and has the characteristics of ingenious design, simple structure, easy implementation, low improvement cost and the like.
Description
Technical field
The utility model relates to a kind of motor car engine member, relates in particular to the exhaust cam shaft on the motor car engine.
Background technique
At present, the structure of automobile engine to exhaust camshaft as shown in Figure 4, front end at camshaft 1 is provided with positive stop lug boss 2 and axle journal 3, be provided with draw-in groove 9 between positive stop lug boss 2 and the axle journal 3, the rear end of camshaft 1 forms the step section, be distributed with four pairs of cams on the axle body between axle journal 3 and the step section from front to back, be respectively first exhaust cam 4, second exhaust cam 5, the 3rd exhaust cam 6 and the 4th exhaust cam 7.During assembling, exhaust cam shaft 1 is supported on the cylinder cap by the draw-in groove 9 of its front end and the step section of rear end, the driving gear of installing on the axle journal 3 is meshed with the driven gear teeth on the admission cam shaft, and exhaust cam shaft 1 also is connected with bent axle by belt and belt pulley, the acting of gas fuel burning in the cylinder promotes reciprocating motion of the pistons like this, piston drives crankshaft rotating by connecting rod, bent axle is in outputting power, driving exhaust cam shaft by belt rotates, exhaust cam shaft is again by the rotation of gear driven admission cam shaft, advance, in the time of the exhaust cam shaft rotation, the cam unseat the valve on the axle body carries out air inlet or exhaust separately.
In order to improve power character, the fuel economy of motor in all speed range, reduce the discharging of tail gas, each automobile production producer is all in the optimization of making great efforts research camshaft degree valve timing." VVT " is the english abbreviation of variable valve timing system of engine, and this system can regulate engine timing continuously.When motor by low speed during to high-speed transitions, electronic computer is automatically pressed to machine oil the little turbine in the intake cam shaftgear, under the effect of pressure, little turbine just can rotate to an angle with respect to gear hub, thereby make admission cam shaft rotation forward or backward in certain scope, to change the moment of IO Intake Valve Opens, reach continuous purpose of regulating valve timing.The producer that has is installed in vvt mechanism the front end of admission cam shaft, abut against the next door of driven gear, because the space of cylinder cap front portion is limited, though this mounting type is less to the change of inlet and outlet cam, but the change to the cylinder cap structure is bigger, reforming cost is quite high, and the redundant space at cylinder cap rear portion is not utilized effectively.
The model utility content
Technical problem to be solved in the utility model is to provide a kind of automobile engine to exhaust camshaft that vvt mechanism is installed that adapts under the prerequisite that does not change the cylinder cap structure.
The technical solution of the utility model is as follows: a kind of automobile engine to exhaust camshaft, on the axle body of camshaft, be distributed with four pairs of cams from front to back, be respectively first exhaust cam, second exhaust cam, the 3rd exhaust cam and the 4th exhaust cam, the front end of camshaft is provided with positive stop lug boss, rear side at positive stop lug boss is provided with a circle fin, forms annular slot between this fin and the positive stop lug boss; Rear end at described camshaft is provided with axle journal, and this axle journal forms annular boss, and the diameter of annular boss is greater than the diameter of camshaft axle body.
The utility model changes axle journal into be arranged on exhaust cam shaft rear end by the front end that is positioned at exhaust cam shaft in the conventional construction, and exhaust cam shaft is supported on the cylinder cap by the annular slot of its front end and the axle body at rear portion.Suit driving gear on the axle journal of exhaust cam shaft rear end, the axle journal of admission cam shaft and the driven gear that is installed on it are correspondingly adjusted to the rear end, vvt mechanism also can be installed in the rear end of admission cam shaft like this, the redundant space at cylinder cap rear portion just in time can ccontaining vvt mechanism.This shows that the utility model is under the prerequisite that does not change the cylinder cap structure, the structure that only needs to adjust the inlet and outlet camshaft just can adapt to the vvt mechanism installation, and reforming cost is lower, and implements to be very easy to.
Radially offer pin-and-hole on the outer peripheral surface of above-mentioned axle journal, locating stud passes driving gear and stretches in this pin-and-hole, can be circumferentially spacing to driving gear, and to prevent that driving gear from coming off and to rotate with respect to exhaust cam shaft.
Front end at above-mentioned axle journal is provided with the annular small boss of a circle, offers annular shallow slot on the outer peripheral surface of axle journal rear end, and collar is installed in the annular shallow slot, and collar cooperates with small boss, and is axially spacing to driving gear, comes off to prevent driving gear.
Above-mentioned each exhaust cam is stepped shape, and the thickness of each exhaust cam flange end is greater than the thickness of basic circle end.Above structure guarantee exhaust cam flange end intensity and with valve between contact area in, can effectively save material, reduce cost of material, and alleviate the weight and the rotary inertia of exhaust cam shaft, make the exhaust cam shaft rotational resistance littler, effective merit volume of output is more.
Beneficial effect: the utility model can adapt to vvt mechanism under the prerequisite that does not change the cylinder cap structure installs, have be skillfully constructed, simple in structure, implement easily, characteristics such as reforming cost is low.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is installed in phase diagram on the cylinder cap for the utility model.
Fig. 4 is the structural representation of background technique.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
As Fig. 1, shown in Figure 3, front end at exhaust cam shaft 1 is formed with annular stop boss 2 and fin 8, fin 8 is positioned at the rear side of positive stop lug boss 2, both diameters are equal substantially, and be provided with annular slot 9 between fin 8 and the positive stop lug boss 2, exhaust cam shaft 1 is supported on the cylinder cap 13 by the annular slot 9 of its front end and the axle body at rear portion.Be provided with the axle journal of installing for driving gear 15 3 in the rear end of described camshaft 1, this axle journal 3 forms annular boss, and the diameter of annular boss is greater than the diameter of camshaft 1 axle body.Radially offer pin-and-hole 10 on the outer peripheral surface of axle journal 3, locating stud passes driving gear 15 and stretches in this pin-and-hole 10, can be circumferentially spacing to driving gear 15, and to prevent that driving gear 15 from coming off and to rotate with respect to exhaust cam shaft 1.The front end of described axle journal 3 is provided with the annular small boss 11 of a circle, offers annular shallow slot 12 on the outer peripheral surface of axle journal 3 rear ends, in the annular shallow slot 12 collar can be installed, and collar cooperates with small boss 11, to driving gear 15 axial limitings, comes off to prevent driving gear 15.
As shown in Figure 1 and Figure 2, camshaft 1 is distributed with four pairs of cams from front to back on the axle body between fin 8 and the axle journal 3, be respectively first exhaust cam 4, second exhaust cam 5, the 3rd exhaust cam 6 and the 4th exhaust cam 7, these four pairs of exhaust cam flanges towards having nothing in common with each other, and each exhaust cam 4,5,6,7 is stepped shape, and the thickness of each exhaust cam flange end is greater than the thickness of basic circle end.Like this guarantee exhaust cam flange end intensity and with valve between contact area in, can effectively save material, reduce cost of material, and alleviate the weight and the rotary inertia of exhaust cam shaft, make the exhaust cam shaft rotational resistance littler, effective merit volume of output is more.
From Fig. 3 further as can be known, the axle journal 16 of admission cam shaft 14 and the driven gear 17 that is installed on it are correspondingly adjusted to the rear end, vvt mechanism 18 also can be installed in the rear end of admission cam shaft like this, the redundant space at cylinder cap 13 rear portions just in time can be ccontaining VVT18 mechanism, driving gear 15 and driven gear 17.This shows that the utility model is under the prerequisite that does not change the cylinder cap structure, the structure that only needs to adjust the inlet and outlet camshaft just can adapt to the vvt mechanism installation, and reforming cost is lower, and implements to be very easy to.
Claims (4)
1, a kind of automobile engine to exhaust camshaft, front end at camshaft (1) is provided with positive stop lug boss (2), be distributed with four pairs of cams on the axle body of camshaft (1) from front to back, be respectively first exhaust cam (4), second exhaust cam (5), the 3rd exhaust cam (6) and the 4th exhaust cam (7), it is characterized in that: the rear side at described positive stop lug boss (2) is provided with a circle fin (8), forms annular slot (9) between this fin (8) and the positive stop lug boss (2); Be provided with axle journal (3) in the rear end of described camshaft (1), this axle journal (3) forms annular boss, and the diameter of annular boss is greater than the diameter of camshaft (1) axle body.
2, automobile engine to exhaust camshaft according to claim 1 is characterized in that: radially offer pin-and-hole (10) on the outer peripheral surface of described axle journal (3).
3, automobile engine to exhaust camshaft according to claim 1 and 2 is characterized in that: the front end at described axle journal (3) is provided with a circle annular small boss (11), offers annular shallow slot (12) on the outer peripheral surface of axle journal (3) rear end.
4, automobile engine to exhaust camshaft according to claim 1 is characterized in that: described each exhaust cam (4,5,6,7) is stepped shape, and the thickness of each exhaust cam flange end is greater than the thickness of basic circle end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200999218U CN201269110Y (en) | 2008-09-08 | 2008-09-08 | Exhaust cam shaft of car engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200999218U CN201269110Y (en) | 2008-09-08 | 2008-09-08 | Exhaust cam shaft of car engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201269110Y true CN201269110Y (en) | 2009-07-08 |
Family
ID=40841710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200999218U Expired - Lifetime CN201269110Y (en) | 2008-09-08 | 2008-09-08 | Exhaust cam shaft of car engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201269110Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121757A (en) * | 2016-08-17 | 2016-11-16 | 力帆实业(集团)股份有限公司 | Admission cam shaft of car engine |
| CN111502790A (en) * | 2020-04-19 | 2020-08-07 | 东风汽车集团有限公司 | Lightweight low-friction cam contact width calculation method |
-
2008
- 2008-09-08 CN CNU2008200999218U patent/CN201269110Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121757A (en) * | 2016-08-17 | 2016-11-16 | 力帆实业(集团)股份有限公司 | Admission cam shaft of car engine |
| CN111502790A (en) * | 2020-04-19 | 2020-08-07 | 东风汽车集团有限公司 | Lightweight low-friction cam contact width calculation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090708 |