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Oscillating lever in a valve train of an internal-combustion engine

A valve mechanism and internal combustion engine technology, applied in the direction of machines/engines, mechanical equipment, engine components, etc., can solve problems such as unused

Inactive Publication Date: 2012-07-25
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here too, the bearing of the rocker arm on the fixed shaft of the machine is implemented not as a rolling bearing, but as a sliding bearing, so that the potential for reducing friction that can be achieved with rolling bearings remains unused

Method used

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  • Oscillating lever in a valve train of an internal-combustion engine
  • Oscillating lever in a valve train of an internal-combustion engine
  • Oscillating lever in a valve train of an internal-combustion engine

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Embodiment Construction

[0020] exist Figure 4 to Figure 7 A rocker arm 1 of the type mentioned at the outset is shown in . Among them, in Figure 4 The rocker arm 1 shown in is a seesaw rocker arm, while in Figure 5 and Figure 6 The rocker 1 shown in is a pendulum rocker. Each rocker arm 1 has a bearing hole 2 with which the rocker arm surrounds an axis 3 so that the rocker arm is supported in a pivotable manner. This bearing is implemented as a sliding bearing.

[0021] The shaft 3 has a feed line 6 for hydraulic medium. In the region of the end 4 of the rocker arm 1 a hydraulic valve play compensation element 5 is arranged. The valve play compensating element rests with its contact area 9 on the end 10 of the gas exchange valve plunger 11 .

[0022] A first radial bore 7 starts from the feed line 6 of the shaft 3 for feeding hydraulic medium to the valve play compensation element 5 . A second radial hole 8 is arranged in the shaft 3 for splash lubrication of the contact area 9 . In the ...

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Abstract

A rocker or swing arm in a valve train of an internal combustion engine has a bearing bore(27) pivotally supporting the arm on a hollow axis located in a fixed position in the engine. The valve train has a camshaft with cams for causing the arm (26)to pivot. A hydraulic valve lash compensation element that acts on the tappet of a gas exchange valve connects to the arm(26). A supply line is arranged in the arm, and a radial opening connecting the hollow interior space of the axis to the supply line is arranged in the axis in the region of the arm(26) to deliver hydraulic means through the hollow axis to the lash compensation element. According to the invention, a labyrinth seal (35) surrounding the hollow axis without contact is arranged on the arm at each axial end of the bearing bore(27). The bearing space of the arm (26)is laterally sealed by this means.

Description

technical field [0001] The invention relates to a seesaw or pendulum rocker arm in a valve train of an internal combustion engine, having a bearing bore, via which the seesaw or pendulum rocker arm is pivotably supported on a hollow shaft arranged fixedly in the internal combustion engine . Background technique [0002] From the publication DE-OS 198 44 202 there is known a valve train of an internal combustion engine with a seesaw-type rocker arm, the seesaw-type rocker arm acts on the push rod of the gas exchange valve with one end, and with the other end, it is connected in the middle In the case of hydraulic valve play compensation elements, they are supported on the cams of the camshaft. In the central region of the seesaw rocker, the seesaw rocker has a bearing bore, by means of which the seesaw rocker is pivotally supported on a fixedly arranged axle. This bearing is a sliding bearing. Here, therefore, the potential for reducing friction remains unused without a ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/18F01L1/24
CPCF01L1/2411F01L1/12F01L2105/00F01L1/181F01L1/14F01L2001/0476F01L1/18F01L13/0005F01L1/24F01L2305/00
Inventor 奥利弗·施内尔奥利弗·维特尔
Owner SCHAEFFLER TECH AG & CO KG