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Device for actuating a rocker arm of a valve train for an internal combustion engine

A technology of a transmission mechanism and an internal combustion engine, which is applied in the field of rocker arm devices, and can solve the problems of expensive structure and high cost of the control device

Active Publication Date: 2021-05-28
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although electromechanical actuating devices of switchable rocker arms are known, for example, from EP 2050933A1, US 2008006232A and US 5544626, in which the switching of the rocker arms can be performed independently of the hydraulic medium pressure generated by the internal combustion engine, the structure of the actuating device is expensive. expensive and costly, in particular a separate actuator is required for each switchable rocker arm to be actuated

Method used

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  • Device for actuating a rocker arm of a valve train for an internal combustion engine
  • Device for actuating a rocker arm of a valve train for an internal combustion engine
  • Device for actuating a rocker arm of a valve train for an internal combustion engine

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Embodiment Construction

[0027] exist Figures 1 to 3 The device shown in the first embodiment has an actuating shaft 2, which can be axially reciprocated between two final positions; a switching element 3, which converts the movement of the actuating shaft conversion into a rotational movement; and a torsion spring mechanism 4 which can be prestressed by rotating the conversion element and is used for pretensioning the levers 5, 6 supported on the conversion element 3 for actuating At least one switching element 7 of a rocker arm 1 , the device being used for electromechanically actuating at least one switchable rocker arm 1 for a valve train of an internal combustion engine. The movement of the steering axis 2 is indicated by a double arrow ( figure 1 ). In this case, the actuating shaft 2 is designed as a rod, and the switching element 3 is designed as a rotatably arranged tube.

[0028] The movement of the actuation shaft 2 can be controlled via the groove guide 11 by the rotational movement of...

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Abstract

The invention relates to a device for electromechanically actuating at least one switchable rocker arm (1) for a valve drive of an internal combustion engine, characterized in that an axially displaceable actuating shaft (2) is provided. ), the actuating shaft has an actuating element ( 8 ) that can be actuated by an electrically controllable actuator ( 9 ), wherein the movement of the actuating shaft ( 2 ) can be affected by the movement of the camshaft ( 10 ) via the actuating element ( 8 ) control and can be converted by means of the conversion element (3) into a rotational movement for spring preloading at least one lever (5, 6) for actuating at least one of the rocker arms (1) Switching element (7).

Description

technical field [0001] The invention relates to a device for electromechanically actuating at least one switchable rocker arm for a valve train of an internal combustion engine. Background technique [0002] Hydraulically switchable rocker arms are known from DE 101 55 827 A1 and DE 100 48 619 A1. In this refinement, it is disadvantageous that, in certain operating states of the internal combustion engine, in particular when the engine is started, the hydraulic medium pressure required for switching is not supplied to a sufficient magnitude and not with the required reaction time . [0003] Although electromechanical actuating devices of switchable rocker arms are known, for example, from EP 2050933A1, US 2008006232A and US 5544626, in which the switching of the rocker arms can be performed independently of the hydraulic medium pressure generated by the internal combustion engine, the structure of the actuating device is expensive. This is expensive and expensive, in parti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L1/18F01L13/00
CPCF01L1/18F01L13/0015F01L1/185F01L13/00F01L13/08F01L2001/186F01L2013/101
Inventor 哈拉尔德·艾伦德特
Owner SCHAEFFLER TECH AG & CO KG
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