KR20100133781A - Engine that is provided with cam carrier - Google Patents

Abstract

PURPOSE: An engine is provided to ensure enhanced stability of a cam carrier and improved oil supply structure because first and second cam shafts are installed in a cam carrier and oil supply paths for the first and second cam shafts are formed in the cam carrier. CONSTITUTION: An engine comprises a first cam shaft(100) which is formed with a first cam on the outer periphery, a second cam shaft(110) which is actuated with the first cam shaft and fitted with a second cam whose timing and quantity are controlled with a variable unit, a cam carrier(210) which supports the first and second cam shafts, a cylinder head in which the cam carrier is installed, and a head cover which covers the cam carrier as an edge thereof is fixed to the cylinder head.

Description

ENGINE THAT IS PROVIDED WITH CAM CARRIER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine having a cam carrier, and more particularly, to an engine having a cam carrier in which an oil channel is formed with a solid support for a continuously variable valve mechanism.

Recently, continuously variable valve actuation (CVVL) mechanisms have been installed in the engine to save fuel, improve output and torque, and a separate support structure and oil supply circuit are essential to support the engine.

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

Referring to FIG. 1, the continuous variable valve timing mechanism may include a first cam shaft 100 having a first cam 105, a second cam shaft 110 having a second cam 115, and a second cam 115. It includes a swing arm 120, the valve 125 is lifted by the swing arm 120 is adjusted by the movement timing and the amount of movement.

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

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide an engine having a cam carrier having a simple and robust assembly structure and an improved lubricating oil (oil) supply structure.

An engine having a cam carrier according to the present invention for achieving the above object is moved by a first cam shaft, the first cam shaft having a first cam formed on the outer circumferential surface thereof, the timing and amount of which are adjusted by a variable mechanism. A second cam shaft having a second cam, a cam carrier supporting the first cam shaft and the second cam shaft, a cylinder head on which the cam carrier is mounted, and an edge of which is fixed to the cylinder head to cover the cam carrier. Include.

The cam carrier has a center body having a center in the longitudinal direction of the first cam shaft, and a semi-circular groove is formed to slidably support one side of the outer circumferential surface of the first cam shaft. Include.

The cam cap is formed in the lower portion corresponding to the semi-circular groove formed in the upper portion of the arm and is fastened to the arm, and the cam cap, the arm, and the cylinder head are fastened to the cylinder head through the cam cap and the arm. It further comprises a cam cap bolt for fixing to each other.

The second camshaft may be supported by the carrier by sequentially passing the lower arms of the semicircular groove.

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

The cylinder head has a main flow path through which oil is supplied, and a second flow path is formed in the arm in correspondence with the first flow path branched from the main flow path, and branched from the second flow path to the first cam shaft. A third passage is formed in the second passage, and branched from the second passage, characterized in that the fourth passage is formed in the arm to the second cam shaft.

A carrier protrusion having a circular cross section protrudes from the lower portion of the arm to correspond to the outer circumferential surface shape of the first cam shaft penetrating the lower portion of the arm.

A head groove is formed in the cylinder head so as to correspond to the shape of the carrier protrusion to secure the coupling structure between the cam carrier and the cylinder head.

In an engine including a cylinder head to which a cam carrier supporting a first cam shaft and a second cam shaft is mounted, the cam carrier includes a center body having a center disposed in the longitudinal direction of the first cam shaft, and an outer circumferential surface of the first cam shaft. A semicircular groove is formed to support one side and includes arms arranged side by side integrally with the center body, and the second camshaft is supported by the carrier by sequentially passing through the lower arms of the semicircular groove. It features.

A main passage through which oil is supplied is formed in the cylinder head, and a second passage is formed in the arm corresponding to the first passage branched from the main passage.

A third channel is formed in the arm by branching from the second channel, and the fourth channel is formed in the arm by branching from the second channel.

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

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

As described above, according to the engine having the cam carrier according to the present invention, since the first cam shaft and the second cam shaft are provided on the cam carrier, the structure is simple and the robustness of the cam carrier is improved. In addition, the oil supply structure is improved by forming a flow path supplied to the first cam shaft and the second cam shaft inside 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 an engine having a continuously variable valve timing cam system and a cam carrier according to an embodiment of the present invention.

Referring to FIG. 2, a cylinder head 205 is provided at the bottom, and a cam carrier set is provided thereon. The cam carrier set is provided with a cam system for continuously varying 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. The semi-circular groove 315 to which the fuel pump 230 is mounted is integrally installed at the 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 has a structure covering the entire cam carrier set.

In addition, the timing gear 225 is attached to one end of the first cam shaft 100, the semi-circular groove 315 is inserted into the fuel pump 230 is inserted into the other end of the cam carrier 210 It is provided integrally with.

The cam system includes a second cam shaft (not shown) to which the first cam shaft 100 and the second cam 115 are mounted, in order to continuously vary the lift timing of the valve. Is provided, the first cam shaft 100 and the second cam shaft is supported by the cam carrier 210.

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

3 is a partially exploded perspective view of an engine having a continuously variable valve timing cam system and 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 in the center of the cylinder head, the lower surface is in contact with the upper surface of the cylinder head 205, the upper surface facing the lower surface of the head cover 200 at intervals. . In addition, the arms 305 are integrally protruded from both side surfaces of the center body 300.

The arms 305 are formed along the both sides of the center body 300 at a predetermined interval (five each), the outer circumferential surface of the first cam shaft 100 on each of the arms 305 A semicircular groove 307 is formed to correspond to the through hole, and a through hole is formed in the lower arm 305 of the semicircular groove 307, and the second cam shaft 110 is inserted into and supported in the through hole. Have

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

The semi-circular groove 307 formed in the arm 305 and the cam cap 215 to act as a bearing so that the first cam shaft 100 is slidable.

One end of the arm 305 is fixed to the center body, and a separate fixing structure is omitted between the arms 305, and the second cam shaft 110 penetrating the arms 305 is the arms. Secure the fixed structure between.

The semicircular groove 315 is integrally disposed in 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, and the fuel The pump 230 is driven by the first camshaft to supply fuel at high pressure.

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

Referring to FIG. 4, the semicircular groove 307 is formed in the arm 305 formed on the side 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 in the arm 305 formed at the end of the center body 300, and the pump mounting hole 317 into which the fuel pump 230 is inserted is inserted into the semicircular groove 315. ) Is formed.

The pump mounting hole 317 is formed in correspondence with the semi-circular groove 307 formed in the arm 305 disposed at the end of the center body 300, the center of the inner peripheral surface of the pump mounting hole 317 and It is preferable that the centers of the semicircular grooves 307 coincide with each other.

In addition, since the radius of the pump mounting hole 317 is greater than the radius of the semicircular groove 307, the thrust surface 400 formed perpendicular to the boundary between the semicircular groove 307 and the pump mounting hole 317 It is formed to easily support the first cam shaft 100 in the longitudinal direction. In addition, it is preferable that a step is formed in the first cam shaft 100 in correspondence with the thrust surface 400.

5 is a partial schematic cross-sectional view of an engine having a continuously variable valve timing cam system and a cam carrier according to an embodiment of the invention.

Referring to FIG. 5, the cam carrier 210 is disposed on the cylinder head 205, and the first cam shaft 100 is disposed in the semicircular groove 307 of the arm 305 of the cam carrier 210. The second cam shaft 110 is mounted through the lower portion of the arm 305.

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

In the cylinder head 205, a main flow path 500 through which oil is supplied is formed in a horizontal direction, and a first flow path 505 branched from the main flow path 500 and opened to an upper surface of the cylinder head 205. ) Is further formed. A second passage 510 is formed in the arm 305 to correspond to the first passage 505.

The first flow path 505 and the second flow path 510 are formed along the through-holes through which the cam cap bolt 220 penetrates, and are easily processed. In addition, a sealing member 535 for sealing between the outer circumferential surface of the cam cap bolt 220 and the inner circumferential surface of the second channel 510 is interposed at the upper end of the second channel 510. That is, in the embodiment of the present invention, the oil moves the second flow passage 510 through a gap between the outer circumferential surface of the cam cap bolt 220 and the inner circumferential surface of the through hole.

A third flow passage 515 and a fourth flow passage 520 in which oil is supplied from the second flow passage 510 to the first cam shaft 100 and the second cam shaft 110 are respectively inside the arm 305. Is formed.

Referring back to FIG. 5, a carrier protrusion 530 having a circular outer side surface is formed below the arm 305 to correspond to the outer circumferential surface of the second cam shaft 110, and corresponds to the carrier protrusion 530. Therefore, the head groove 525 is formed in the cylinder head 205.

The head groove 525 has a semicircular inner cross-sectional shape corresponding to the carrier protrusion 530, and the cylinder head 205 due to the coupling structure of the head groove 525 and the carrier protrusion 530. And the coupling structure of the cam carrier 210 is firm.

In an embodiment of the present invention, the second camshaft is connected to the swing arm or included in the same component group, and enables simultaneous assembly, support, and oil supply of the primary cam (shaft) and the secondary cam (shaft).

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and easily changed and equalized by those skilled in the art from the embodiments of the present invention. It includes all changes to the extent deemed acceptable.

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

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

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

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

5 is a partial schematic cross-sectional view of an engine having a continuously variable valve timing cam system and a cam carrier according to an embodiment of the invention.

<Description of the symbols for the main parts of the drawings>

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 groove

315: pump housing

317: pump mounting hole

400 thrust surface

500: Main Euro

505: first euro

510: second euro

515: third euro

520: Euro 4

525: head groove

530: carrier projection

535: sealing member

Claims (13)

A first cam shaft having a first cam formed on an outer circumferential surface thereof; A second cam shaft which is moved by the first cam shaft, and whose second cam is adjusted in timing and amount by a variable mechanism; A cam carrier supporting the first cam shaft and the second cam shaft; A cylinder head to which the cam carrier is mounted; And An engine having a cam carrier comprising a head cover having an edge fixed to the cylinder head to cover the cam carrier. According to claim 1, The cam carrier is, A center body having a center disposed in the longitudinal direction of the first camshaft; And A semicircular groove is formed so as to slide and support one side of the outer circumferential surface of the first camshaft, and an engine having a cam carrier comprising arms disposed sideways integrally with the center body. The method of claim 2, A cam cap formed at a lower portion of the arm to correspond to a semicircular groove formed at an upper portion of the arm and fastened to the arm; And And a cam cap bolt that penetrates the cam cap and the arm to the cylinder head to secure the cam cap, the arm, and the cylinder head to each other. The method of claim 2, The second camshaft is an engine having a cam carrier, characterized in that supported by the carrier by sequentially passing through the lower arm of the semi-circular groove. The method of claim 2, And a cam carrier in which a pump housing into which a fuel pump is inserted and mounted corresponding to the semi-circular groove is integrally formed with the arm formed at the end of the center body of the cam carrier. The method of claim 2, The cylinder head has a main flow path through which oil is supplied, and a second flow path is formed in the arm in correspondence with the first flow path branched from the main flow path, and branched from the second flow path to the first cam shaft. And a third flow path formed at the second flow path, the fourth flow path being formed at the arm by branching from the second flow path to the second cam shaft. The method of claim 2, And a cam carrier protruding from the lower portion of the arm, the carrier protrusion having a circular cross section corresponding to the outer circumferential surface shape of the first cam shaft penetrating the lower portion of the arm. 8. The method of claim 7, An engine having a cam carrier, wherein a head groove is formed in the cylinder head corresponding to the shape of the carrier protrusion to secure a coupling structure between the cam carrier and the cylinder head. In an engine comprising a cylinder head mounted with a cam carrier for supporting the first cam shaft and the second cam shaft, The cam carrier is, A center body having a center disposed in the longitudinal direction of the first camshaft; And A semi-circular groove is formed to slide and support one side of the outer circumferential surface of the first camshaft, and includes arms disposed on side surfaces integrally with the center body. The second camshaft is an engine having a cam carrier, characterized in that supported by the carrier by sequentially passing through the lower arm of the semi-circular groove. The method of claim 9, An engine having a cam carrier having a main flow path through which oil is supplied to the cylinder head, and a second flow path formed in the arm corresponding to the first flow path branched from the main flow path. The method of claim 10,  A cam carrier branched from the second channel to form a third channel formed in the arm to the first cam shaft, and a fourth channel formed in the arm to branch from the second channel formed in the arm; Equipped engine. The method of claim 9, The first channel and the second channel are formed along the cam cap bolt passing through the cam carrier and the cylinder head, and the third channel is formed to pass through a semicircular groove formed in the arm of the cam carrier. An engine provided with a cam carrier. The method of claim 8, The second camshaft is an engine having a cam carrier which is moved by the first camshaft, the timing and amount of movement of the swing arm connected thereto is variably adjusted.

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