KR101518879B1 - Engine that is provided with cam carrier - Google Patents

Abstract

The engine having the cam carrier according to the embodiment of the present invention includes a first camshaft having a first cam formed on its outer circumferential surface, a second cam that is moved by the first camshaft and whose timing and amount are controlled by a variable mechanism, And a head cover which is fixed to the cylinder head and covers the cam carrier. The cylinder head includes a first camshaft, a second camshaft, a cam carrier supporting the first camshaft and the second camshaft, a cylinder head on which the cam carrier is mounted,

Therefore, by providing the first camshaft and the second camshaft in the cam carrier, the structure is simple and the rigidity of the cam carrier is improved. In addition, the oil supply structure is improved by forming the oil passage to be supplied to the first camshaft and the second camshaft in the cam carrier.

Cam carrier, variable valve, CVVL, camshaft, flow path, cam cap

Description

TECHNICAL FIELD [0001] The present invention relates to an engine having a cam carrier,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine provided with a cam carrier, and more particularly to an engine provided with a cam carrier on which a continuous variable valve mechanism is rigidly supported and an oil passage is formed.

Recently, a continuously variable valve actuation (CVVL) mechanism is provided in the engine for fuel economy, output and torque enhancement, and a separate support structure and oil supply circuit are necessary to support it.

1 is a partial perspective view of a typical continuous variable valve timing cam system;

1, the continuous variable valve timing mechanism includes a first camshaft 100 with a first cam 105, a second camshaft 110 with a second cam 115, A swing arm 120 whose movement timing and amount of movement are controlled, and a valve 125 which is lifted by the swing arm 120. [

As described above, the timing mechanism of the continuous variable valve requires a separate fixing member for fixing the first camshaft 100 and the second camshaft 110, so that the structure is complicated and the oil supply structure for lubrication is complicated Do.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an engine having a simple and rigid assembly structure and improved lubricant supply structure.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described, an engine having a cam carrier includes a first camshaft having a first cam formed on its outer circumferential surface, a first camshaft driven by the first camshaft, A second camshaft provided with a second cam, a cam carrier supporting the first camshaft and the second camshaft, a cylinder head on which the cam carrier is mounted, and a head cover fixed to the cylinder head and covering the cam carrier, .

Wherein the cam carrier includes a center body having a center in the longitudinal direction of the first camshaft and a semicircular groove formed in the center of the outer circumferential face of the first camshaft so as to slide on one side of the camshaft, .

A cam cap which is coupled to the cylinder head by passing through the cam cap and the arm so as to be engaged with the cam cap, the arm, and the cylinder head, And a cam cap bolt for fixing the cam cap bolts to each other.

And the second cam shaft sequentially passes through the lower arms of the semicircular groove and is supported by the carrier.

A pump housing in which a fuel pump is inserted and mounted corresponding to the semicircular groove is formed integrally with the arm formed at the center body end of the cam carrier.

Wherein the cylinder head is formed with a main flow passage through which oil is supplied, a second flow passage is formed in the arm corresponding to a first flow passage branched from the main flow passage, branched from the second flow passage, A third flow path is formed in the second flow path, and a fourth flow path is formed in the arm by branching from the second flow path to the second camshaft.

A carrier protrusion having a circular cross section corresponding to the outer circumferential surface shape of the first cam shaft passing through the lower portion of the arm is formed protruding from the lower portion of the arm.

A head groove is formed in the cylinder head in correspondence with the shape of the carrier protrusion, so that the coupling structure between the cam carrier and the cylinder head is secured.

In an engine including a cylinder head on which a cam carrier supporting a first camshaft and a second camshaft is mounted, the cam carrier has a center body centered in the longitudinal direction of the first camshaft, Wherein the semicircular groove is formed in a semicircular groove for slidingly supporting one side of the semicircular groove, and the arms are disposed side by side integrally with the center body, and the second camshaft successively passes through the lower arms of the semicircular groove to be supported by the carrier .

The cylinder head is provided with a main flow path through which oil is supplied, and a second flow path is formed in the arm corresponding to a first flow path branched from the main flow path.

A third flow path is formed in the arm by the first camshaft branched from the second flow path, and a fourth flow path is formed in the arm by branching from the second flow path to the second camshaft.

The first flow path and the second flow path are formed along the cam cap bolt passing through the cam carrier and the cylinder head, and the third flow path is formed to pass through the semicircular groove formed in the arm of the cam carrier.

The second camshaft is moved by the first camshaft, and the timing and amount of movement of the swing arm connected thereto are variably controlled.

As described above, according to the engine provided with the cam carrier according to the present invention, since the first camshaft and the second camshaft are provided in the cam carrier, the structure is simple and the rigidity of the cam carrier is improved. In addition, the oil supply structure is improved by forming the oil passage to be supplied to the first camshaft and the second camshaft in the cam carrier.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a partially exploded perspective view of a continuously variable valve timing cam system and an engine with a cam carrier according to an embodiment of the present invention.

Referring to FIG. 2, a cylinder head 205 is provided at a lower portion, and a cam carrier set is provided thereon. The cam carrier set is provided with a cam system that continuously varies the lift timing and the lift amount of the intake valve and the exhaust valve.

The cam system includes a cam carrier 210, a cam cap 215, a cam cap bolt 220, a first cam shaft 100, a second cam 115, a swing arm 120, and a timing gear 225 And a semicircular groove 315 to which the fuel pump 230 is mounted is integrally installed at an end of the cam carrier 210.

The cam carrier 210 is fixed to the cylinder head 205 by the cam cap 215 and the cam cap bolt 220 and the head cover 200 covers the entire cam carrier set.

A semicircular groove 315 is formed at one end of the first camshaft 100 to receive the timing gear 225 and at the other end of the camshaft 210 to receive the fuel pump 230, Respectively.

The cam system is provided with a first camshaft (100) formed on the outer peripheral surface of the first cam (105) and a second camshaft (not shown) on which the second cam (115) is mounted, And the first camshaft 100 and the second camshaft are supported by the cam carrier 210.

The structure of the cam carrier 210 will be described in detail with reference to FIGS. 3 and 4. FIG.

3 is a partially exploded perspective view of a continuously variable valve timing cam system and an engine with a cam carrier according to an embodiment of the present invention.

Referring to FIG. 3, the cam carrier 210 includes a center body 300, an arm 305, and the semicircular groove 315.

The center body 300 is formed at the central portion of the cylinder head, the lower surface thereof contacts the upper surface of the cylinder head 205, and the upper surface thereof faces the lower surface of the head cover 200 at a gap . In addition, the arm 305 is integrally formed on both sides of the center body 300.

A plurality of (five each) arms 305 are formed at predetermined intervals along both side surfaces of the center body 300 and upper portions of the arms 305 are formed on the outer circumferential surface of the first camshaft 100 And a through hole is formed in the lower arm 305 of the semicircular groove 307 and the through hole is inserted and supported by the second cam shaft 110. [ .

A bolt hole 310 is formed in an end portion of the arm 305 from top to bottom and the cam cap bolt 220 is inserted through the bolt hole 310. 2, the cam cap 215 is also formed with a semicircular groove corresponding to the semicircular groove 307 formed in the arm 305.

A semicircular groove 307 formed in the arm 305 and the cam cap 215 serves as a bearing so that the first camshaft 100 can slide.

One end of the arm 305 is fixed to the center body, a separate fixing structure is omitted between the arms 305, and the second camshaft 110 passing through the arms 305 is coupled to the arm 305, Thereby firmly fixing the fixing structure between them.

Wherein the semicircular groove 315 is integrally formed with the arm 305 formed at the end of the center body 300 and the fuel pump (high pressure pump) is inserted into the semicircular groove 315, The pump 230 is driven by the first camshaft to supply fuel at a high pressure.

4 is a partial perspective view of a continuously variable valve timing cam system and an engine with a cam carrier according to an embodiment of the present invention.

4, the semicircular groove 307 is formed in the arm 305 formed on the side surface of the center body 300 of the cam carrier 210, and oil is supplied to the semicircular groove 307 An oil passage 315 is formed.

The semicircular groove 315 is integrally formed with the arm 305 formed at the end of the center body 300 and the pump mounting hole 317 Is formed.

The pump mounting hole 317 is formed to correspond to the semicircular groove 307 formed in the arm 305 disposed at the end of the center body 300. The center of the inner circumferential surface of the pump mounting hole 317, It is preferable that the centers of the semicircular grooves 307 coincide with each other.

Since the radius of the pump mounting hole 317 is larger than the radius of the semicircular groove 307, a thrust surface 400 formed vertically at a boundary portion between the semicircular groove 307 and the pump mounting hole 317, So that the first camshaft 100 can be easily supported in the longitudinal direction. In addition, it is preferable that a step is formed in the first camshaft 100 in correspondence with the thrust surface 400.

5 is a schematic cross-sectional view of an engine with a continuously variable valve timing cam system and a cam carrier in accordance with an embodiment of the present invention.

5, the cam carrier 210 is disposed on the cylinder head 205 and the first cam shaft 100 is inserted into the semicircular groove 307 of the arm 305 of the cam carrier 210. [ And the second camshaft 110 is fitted through the lower portion of the arm 305. [0050]

The cam cap 215 is disposed on the arm 305 and the cam cap bolt 220 is disposed through the cam cap 215, the arm 305 and the cylinder head 205 sequentially.

A main oil passage 500 is provided in the cylinder head 205 in the horizontal direction and a first oil passage 505 branched from the main oil passage 500 and opened to the upper surface of the cylinder head 205 ) Is further formed. A second flow path 510 is formed in the arm 305 in correspondence with the first flow path 505.

The first flow path 505 and the second flow path 510 are formed along a through hole through which the cam cap bolt 220 penetrates, thereby facilitating processing. A sealing member 535 for sealing the outer circumferential surface of the cam cap bolt 220 and the inner circumferential surface of the second flow path 510 is disposed at the upper end of the second flow path 510. That is, in the embodiment of the present invention, the oil moves through the second flow path 510 through the gap between the outer circumferential surface of the cam cap bolt 220 and the inner circumferential surface of the through hole.

A third flow path 515 in which oil is supplied to the first camshaft 100 and the second camshaft 110 in the second flow path 510 and a third flow path 515 in which the fourth flow path 520 is connected to the inside As shown in FIG.

5, a carrier protrusion 530 having a circular outer surface corresponding to the outer circumferential surface of the second camshaft 110 is formed at a lower portion of the arm 305, and a carrier protrusion 530 corresponding to the carrier protrusion 530 So that the cylinder head 205 has a head groove 525 formed therein.

The head groove 525 has a semi-circular cross-sectional shape corresponding to the carrier protrusion 530 and the cylinder head 205 is formed by the coupling structure of the head groove 525 and the carrier protrusion 530. [ And the coupling structure of the cam carrier 210 becomes strong.

In the embodiment of the present invention, the second camshaft is included in the same or a similar group of components connected to the swing arm, and enables the first camshaft and the second camshaft to be assembled, supported, and supplied at the same time.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And all changes to the scope that are deemed to be valid.

1 is a partial perspective view of a typical continuous variable valve timing cam system;

2 is a partially exploded perspective view of a continuously variable valve timing cam system and an engine with a cam carrier according to an embodiment of the present invention.

3 is a partially exploded perspective view of a continuously variable valve timing cam system and an engine with a cam carrier according to an embodiment of the present invention.

4 is a partial perspective view of a continuously variable valve timing cam system and an engine with a cam carrier according to an embodiment of the present invention.

5 is a schematic cross-sectional view of an engine with a continuously variable valve timing cam system and a cam carrier in accordance with an embodiment of the present invention.

Description of the Related Art

100: first camshaft

105: first cam

110: second camshaft

115: second cam

120: swing arm

125: Valve

200: Head cover

205: cylinder head

210: cam carrier

215: cam cap

220: Cam cap bolt

225: timing gear

230: Fuel pump (high pressure pump)

300: center body

305: Cancer

307: Semicircle home

315: pump housing

317: pump mounting hole

400: Thrust face

500: Main flow

505:

510:

515: Third Euro

520: Fourth Euro

525: Head groove

530: carrier projection

535: sealing member

Claims (13)

A first camshaft having a first cam formed on an outer circumferential surface thereof; A second camshaft which is moved by the first camshaft and is provided with a second cam whose timing and amount are controlled by a variable mechanism; A cam carrier supporting the first camshaft and the second camshaft; A cylinder head on which the cam carrier is mounted; And And a head cover having an edge fixed to the cylinder head to cover the cam carrier, The cam carrier A center body having a center disposed in the longitudinal direction of the first camshaft; And Wherein the first cam shaft is formed with a semicircular groove for slidingly supporting one side of the outer circumferential surface of the first cam shaft, and arms disposed on a side surface integrally with the center body, And a pump housing in which a fuel pump is inserted and mounted corresponding to the semicircular groove is formed integrally with the arm formed at the center body end of the cam carrier. delete The method according to claim 1, A cam cap having a semicircular groove formed in a lower portion corresponding to a semicircular groove formed in an upper portion of the arm and fastened to the arm; And And a cam cap bolt which penetrates the cam cap and the arm and is fastened to the cylinder head to fix the cam cap, the arm, and the cylinder head to each other. The method according to claim 1, And the second camshaft sequentially passes through the lower arms of the semicircular groove and is supported by the cam carrier. delete The method according to claim 1, Wherein the cylinder head is formed with a main flow passage through which oil is supplied, a second flow passage is formed in the arm corresponding to a first flow passage branched from the main flow passage, branched from the second flow passage, Wherein a third flow path is formed in the second flow path, and a fourth flow path is formed in the arm by branching from the second flow path to the second cam shaft. The method according to claim 1, And a cam carrier which is formed by projecting a carrier projection having a circular section in a lower portion thereof in correspondence with an outer peripheral surface shape of the first cam shaft passing through a lower portion of the arm. 8. The method of claim 7, Wherein a head groove is formed in the cylinder head in correspondence with the shape of the carrier protrusion, so that the coupling structure between the cam carrier and the cylinder head is made firm. In an engine including a cylinder head on which a cam carrier supporting a first camshaft and a second camshaft is mounted, The cam carrier A center body having a center disposed in the longitudinal direction of the first camshaft; And Wherein the first cam shaft is formed with a semicircular groove for slidingly supporting one side of the outer circumferential surface of the first cam shaft, and arms disposed on a side surface integrally with the center body, Wherein the second cam shaft sequentially passes through the lower arms of the semicircular groove and is supported by the cam carrier, Wherein the cylinder head is provided with a main flow path to which oil is supplied and a cam carrier in which a second flow path is formed in correspondence with a first flow path branched from the main flow path. delete 10. The method of claim 9,  And a third flow path is formed in the arm by branching from the second flow path and branched from the second flow path to form a fourth flow path in the arm with the second cam shaft. Equipped engine. 12. The method of claim 11, Wherein the first flow path and the second flow path are formed along a cam cap bolt passing through the cam carrier and the cylinder head, and the third flow path is formed to pass through the semicircular groove formed in the arm of the cam carrier And a cam carrier. 9. The method of claim 8, Wherein the second camshaft is moved by the first camshaft, and the timing and amount of movement of the swing arm connected thereto are variably controlled.

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