Patent ID: 7798121
Filing Date: 2010-09-21
Classification: F02D,G01D

Abstract:
1. A device for detecting the angle of rotation of a throttle valve operated by an electric motor, comprising: a throttle valve shaft configured as a hollow shaft; an intake system; a throttle valve housing, the device being supported in a rotatable manner on the throttle valve shaft in the intake system of the throttle valve housing; a servomotor coupled to the throttle valve shaft; an electronic control unit, the servomotor being controlled by the electronic control unit, the electronic control unit predetermining the rotational position of the throttle valve; a manually operatable setpoint value input apparatus, a setpoint value of the rotational position of the throttle valve being predetermined by the manually operatable setpoint value input apparatus and being supplied to the electronic control unit; a setpoint value sensor shaft coupled to the manually operatable setpoint value input apparatus, the setpoint value sensor shaft being arranged coaxially and rotatably in the hollow throttle valve shaft so that a rotational position of the setpoint value sensor shaft corresponds respectively to the manually predetermined setpoint value of the rotational position of the throttle valve, wherein one end of the throttle valve shaft and one end of the setpoint value sensor shaft extend out of a first side of the throttle valve housing, a first permanent magnet being arranged at the end of the throttle valve shaft and a second permanent magnet being arranged at the end of the setpoint value sensor shaft, and wherein for detection of magnetic fields of the first and second permanent magnet a magnetic field sensor arrangement is provided generating an angle-dependent electric signal respectively of the rotational position of the throttle valve and of the rotational position of the setpoint value sensor shaft and each of these signals being supplied to the electronic control unit.