DE102014211638A1 - carrier module - Google Patents

Abstract

Proposed is a carrier module (1) for an OHC valve drive of a single-cylinder internal combustion engine, with two upright and mutually spaced support walls (2), in which at least one camshaft (3) and at least one lever axis (4, 5) with one or more cam follower levers ( 6, 7), the support walls (2) are each bridging, are mounted, wherein the support module (7) in the foot region (8) is connectable to a cylinder head and wherein the support walls (2) with the present as a plate foot area (8) form a one-piece, obtained from sheet metal by punching unit and from the foot (8) are bent up.

Description

The invention relates to a carrier module for an OHC valve drive of an internal combustion engine, with two upright and mutually spaced support walls, in which at least one camshaft and at least one lever axis with one or more cam followers thereon, the support walls each bridging, are stored, wherein the carrier module in the Foot area with a cylinder head is connectable.

Generic carrier modules are, for example, in single-cylinder motorcycle engines with 2V technology in use and made of cast aluminum (see valve engine Honda engine KRM / KVS, installed in Honda CG 150 Titan (Brazil)). The levers for actuating the two gas exchange valves sit on separate shafts. Such a carrier module is relatively massive, requires unnecessary rework and takes up too much space. Ultimately, it is too expensive for mass production.

It is an object of the invention to create a carrier module without the aforementioned disadvantages.

According to the invention, this object is achieved in that the supporting walls with the present as a plate foot area form a one-piece, obtained from sheet metal by separating unit and are bent up from the foot.

Thus, a lightweight and compact carrier module is particularly, but not exclusively, available for motorcycles, boats, or minisite engines. Preferably, such a module should be used in single-cylinder engines. However, it is also conceivable and intended use in engines with a number of cylinders> 1.

The protection of this invention also extends to a support module with holes in the support walls and only the possibility of receiving camshaft (s) and lever axis (s), therefore, without the latter components.

As a sheet metal sheet (board / tape) in particular, in question, the unit (supporting walls and foot area) preferably, but not exclusively, to be formed by a separation process such as punching with subsequent bending up of the supporting walls. The partial separation of the support walls from the foot area can take place in one go with the separation of the foot area from the board / the strip or in a subsequent method step.

Instead of the o. G. Steel materials for the unit also offer other lightweight materials such as aluminum sheet, also packaged or otherwise reinforced, plastics, also fiber or particle reinforced, etc. on.

The carrier module according to the invention is designed to accommodate only a central, short-building camshaft and at least one lever axis flanking the camshaft, wherein preferably an inlet and an outlet lever axis each mounted thereon cam followers (at least one per axle) are provided and more than one camshaft are used can.

According to a further development of the invention, the supporting walls can be bent upwards from the foot area, their head areas advantageously lying on the outer edge of the foot area prior to bending up, and ultimately a middle bar remaining in the foot area. Thus, the foot area claimed at the edge comparatively little footprint. Collisions with environmental components may be avoided.

Alternatively, it is proposed to provide a central separating gap in the foot area and to bend the supporting walls away from each other. The foot area thereby attains a box or frame-like design.

The foot area has, as further proposed, in the region of its edges openings, which may be, for example, punched holes. The openings serve, for the mounting case of the support module on the cylinder head, an engagement of, for example, screws or centering pins.

The camshaft (s) and lever axis (s) can also run directly into bores of the support plates, which bores may possibly not be finished, which has a favorable effect on the cost of the support module. However, it is also provided to provide the holes with separate sleeves, which are, for example. Pressed and can also take bearings.

The invention is apparent from the drawing.

1 shows a spatial side view of the carrier module and

2 shows a spatial view of the carrier module from above.

Shown in both figures is a punch-bending technology made of sheet steel carrier module 1 for an OHC valve train of a single-cylinder motorcycle engine.

The carrier module 1 has, as both figures reveal, two upright and spaced apart supporting walls 2 in which a center camshaft 3 sitting, which on both sides of a lever axis 4 . 5 flanked. The lever axis 4 carries a cam follower lever 6 , which serves to actuate an intake valve, whereas on the lever axis 5 a cam follower lever 7 is attached, via which an exhaust valve can be actuated. Possibly. can the levers 6 . 7 also act on bridges, so that simultaneously several equally acting gas exchange valves can be operated.

The supporting walls 2 go from a footer available as a plate 8th out and are integrally connected with this. This will be the contour of the supporting walls 2 by punching, leaving a bending edge, from the foot area 8th separated and then the supporting walls 2 bent up towards each other. In the foot area 8th thus remains a central pier 9 between the supporting walls 2 ,

How best 1 is removable, are the lever axes 4 . 5 in flared flaps 10 the supporting walls 2 stored, which in the top edge area 11 the supporting walls 2 lie. Thus, below the tabs 10 free space formed.

In the section of tab-like upstanding edges 12 of the foot area 8th are openings 13 for screwing / centering of the carrier module 1 punched with the cylinder head.

Last but not least is on the right supporting wall 2 to 1 an oil riser 14 located, which is clipped there and a forwarding of lubricating oil in the direction of the cylinder head cover (not shown) is used.

LIST OF REFERENCE NUMBERS

1

carrier module

2

supporting wall

3

camshaft

4

Lever axis (inlet)

5

Lever axis (outlet)

6

Cam follower lever

7

Cam follower lever

8th

footer

9

center web

10

flap

11

Head edge region

12

Edge (footer)

13

opening

14

Oil riser tubes

15

head area

16

outer edge

Claims (10)

Carrier module ( 1 ) for an OHC valve drive of an internal combustion engine, with two upright and mutually spaced support walls ( 2 ), in which at least one camshaft ( 3 ) and at least one lever axis ( 4 . 5 ) with one or more cam followers ( 6 . 7 ) on this, the supporting walls ( 2 ) are each bridging, are stored, wherein the carrier module ( 1 ) in its footer ( 8th ) is connectable to a cylinder head, characterized in that the supporting walls ( 2 ) with the base area as a plate ( 8th ) form a one-piece, obtained from sheet metal by separating unit and from the foot area ( 8th ) are bent up. Carrier module according to claim 1, characterized in that as a separation method punching is applied. Carrier module according to claim 1, characterized in that the supporting walls ( 2 ), with the fate of a connecting central web ( 9 ) in the foot area ( 8th ), are bent towards each other, so that the foot area ( 8th ) forms an H-like profile in plan view. Carrier module according to claim 1, characterized in that the supporting walls ( 2 ), forming a recess between them in the foot area ( 8th ), are bent away from each other so that the foot area ( 8th ) has a frame-like profile in plan view. Carrier module according to claim 1, characterized in that in the carrier module ( 1 ) exactly one camshaft ( 3 ), which, in the transverse direction of the supporting walls ( 2 ), on both sides of each one lever axis (intake lever axis ( 4 ), Exhaust lever axis ( 5 )) with only one cam follower lever ( 6 . 7 ) is flanked. Carrier module according to claim 5, characterized in that the lever axes ( 4 . 5 ) in flared flaps ( 10 ) of the supporting walls ( 2 ), which in the top edge region ( 11 ) of the supporting walls ( 2 ) lie. Carrier module according to claim 1, characterized in that at edges ( 12 ) of the footer ( 8th ) punched / drilled openings ( 13 ) for screwing or centering the carrier module ( 1 ) lie with the cylinder head. Carrier module according to claim 1 or 7, characterized in that the edges ( 12 ) of the footer ( 8th ) protrude like a tab. Carrier module according to claim 1, characterized in that on at least one supporting wall ( 2 ) at least one oil riser ( 14 ) is attached. Carrier module according to claim 1, characterized in that the carrier module ( 1 ) for one Valve gear is provided a single-cylinder internal combustion engine.

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