Working principle and detection method of Hall throttle position sensor

(1) There is a throttle control motor to control the throttle opening of the engine. The power of the motor is used to overcome the force of the throttle return spring to open the throttle after increasing the torque through the secondary reduction gear. Hall element is installed on the second reduction gear. When the throttle valve is driven to open by the throttle motor. The position of the magnet and the Hall element on the housing moves relatively. Thereby generating a Hall voltage.

(2) Electronic throttle body control principle: Engine ECU controls the magnitude and direction of current flowing to the throttle control motor, so that the motor rotates or keeps rotating, and the throttle is opened or closed through the reduction gear. The actual throttle opening is detected by the throttle position sensor and fed back to the engine ECU. The Hall throttle position sensor converts the throttle opening into voltage and sends it to the engine ECU as a throttle opening signal (VTA). When the VTA voltage is lower than the standard value, other devices determine that it is in an idle state.

Hall element throttle position sensor is mainly composed of Hall element and Hall IC, which is made of a magnet that can rotate around it. The magnet is mounted on the same shaft as the throttle shaft. It rotates with the throttle.