Valve train device for internal combustion engine, has cam elements that are provided with first and second transmitter wheels, and third torque-proof and axially fixed transmitter wheel which is located on basic camshaft

摘要

#CMT# #/CMT# The valve train device has a first torque-proof and axially displaceable cam element (6) and a second torque-proof and axially displaceable cam element (11) that are arranged on a basic camshaft (1). A sensing unit (7) is located on the basic camshaft. The first cam element is provided with a first transmitter wheel (9) and the second cam element is provided with a second transmitter wheel (10). A third torque-proof and axially fixed transmitter wheel (8) is located on the basic camshaft. #CMT#USE : #/CMT# Valve train device for internal combustion engine. #CMT#ADVANTAGE : #/CMT# The axial position of the cam element and the radial position of the basic cam shaft can be determined accurately by the contactless sensing unit by detecting the number and the width of tooth spaces of the third transmitter wheel in the valve train device. The transmitter wheels can be displaced axially during the axial displacement of the cam elements, by providing the transmitter wheels at the cam elements. Since the sensing unit is arranged at a center position of the third transmitter wheel, need of axial displacement of the sensing unit and/or need of several sensing units in the valve train device can be prevented efficiently. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawings show the perspective and exploded perspective views of the valve train device. 1 : Basic camshaft 3 : Actuator 6,11 : Cam elements 7 : Sensing unit 8-10 : Transmitter wheels.