Actuating device, switchable rocker arm and variable valve mechanism

A technology for actuating devices and valve trains, applied in valve devices, engine components, machines/engines, etc., can solve the problems of serious friction between selector cams and locking pins, short life of parts, etc., and achieve simplified design, compact structure and layout , control fast effects

Inactive Publication Date: 2019-09-27
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem with this design is that the friction between the selector cam and the locking pin is severe, making the parts life shorter

Method used

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  • Actuating device, switchable rocker arm and variable valve mechanism
  • Actuating device, switchable rocker arm and variable valve mechanism
  • Actuating device, switchable rocker arm and variable valve mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] figure 1 and figure 2 Schematic diagrams respectively showing a switchable rocker arm in a locked state and an unlocked state according to a preferred embodiment of the present invention. The switchable rocker arm is used in a variable valve train of an internal combustion engine.

[0031] exist figure 1 and figure 2 The cam 1, the switchable rocker arm 2, the valve stem 3 and the valve lifter 4 of the variable valve train are shown in . In this preferred embodiment, the switchable rocker arm 2 is a roller rocker arm, but the invention is not limited to roller rocker arms. When the valve system is running, the cam 1 rotates with the camshaft (not shown), and the rotation of the cam 1 can make the switchable rocker arm 2 move, thereby driving the valve stem 3 connected with the switchable rocker arm 2 . The valve stem 3 and the hydraulic valve lifter 4 are respectively arranged at both longitudinal ends of the switchable rocker arm 2 , so that the hydraulic valve ...

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PUM

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Abstract

The invention relates to an actuating device, a switchable rocker arm and a variable valve mechanism. The switchable rocker arm comprises two branch arms which can move relative to each other and a locking mechanism, wherein the locking mechanism comprises a locking pin and the actuating device, the locking pin is accommodated between longitudinal end parts of the two branch arms and can be used for connecting or disconnecting the two branch arms, the actuating device can be used for actuating the locking pin, so that the locking pin moves between a connecting position and a disconnecting position; and the actuating device comprises a locking rocker arm and a linear actuator, wherein the locking rocker arm can rotate around a pivot which is perpendicular to the locking rocker arm and is longitudinally arranged, one longitudinal end part of the locking rocker arm is actuated by the linear actuator, so that the other longitudinal end part of the locking rocker arm can actuate the locking pin, and the locking pin can move between the connecting position and the disconnecting position.

Description

technical field [0001] The invention relates to an actuation device for a locking mechanism of a switchable rocker arm. The invention also relates to a switchable rocker arm comprising an actuation device as described above. Furthermore, the present invention also relates to a variable valve train comprising the above-mentioned switchable rocker arm. Background technique [0002] In order to improve the performance of internal combustion engines, improve fuel economy and reduce exhaust emissions, variable valve trains are often used. A possible solution is known as a switchable rocker arm, wherein the rocker arm can have several partial arms, for example an inner arm and an outer arm. The switchable rocker arm can be switched between a locked state and an unlocked state by means of a locking mechanism to control valve actuation. In one possible mode, the locking mechanism has a locking pin, when the locking pin is in the connected position, the switchable rocker arm is in...

Claims

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Application Information

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IPC IPC(8): F01L1/18F01L1/46F01L9/04F01L9/20
CPCF01L1/18F01L1/46F01L2001/186F01L9/21F01L2009/2146F01L9/40F01L9/20
Inventor 黄伯超
Owner SCHAEFFLER TECH AG & CO KG
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