Arrangement for electromechanical actuation of at least one switchable drag lever for valve train of internal combustion engine

Abstract

The invention relates to an arrangement for the electromechanical actuation of at least one switchable drag lever (1) for a valve train of an internal combustion engine, characterized in that an axially displaceable actuating shaft (2) is provided with an actuating element (8) actuatable by an electrically controllable actuator (9), wherein the displacement of the actuating shaft (2) is controllable via the actuating element (8) by the movement of a camshaft (10) and can be transferred by a transmission member (3) to a rotational movement for pre-tightening a spring of at least one actuating lever (5, 6) for actuating at least one switching element (7) of the drag lever (1).

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...

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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

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