CONSTRUCTION
A non-contact type accelerator pedal sensor assembly is used.
This sensor uses a Hall IC*1, which can retrieve the strength of the magnetic field as an electrical signal, using the Hall effect*2, in which the output voltage can be directly received in accordance with the accelerator pedal depression amount. When the accelerator pedal depression amount changes, the angle of the magnetic field towards the flow of the current in the Hall IC changes. As a result, the strength of the current and vertical magnetic field changes. Due to this, the change in the voltage generated in the vertical direction towards the forced current and direction of the magnetic field is sent to the ECM as an accelerator pedal depression amount signal. Also, in order to ensure reliability, duplicate sensors (main and sub) with differing sensor output characteristics, are used.
Tech Tips
*1: An electrical component which uses the electromotive force resulting from the potential difference in the magnetic field.
*2: Phenomenon in which a potential difference occurs in the electric current and magnetic field in the vertical direction when a magnetic field in the vertical direction is applied and electric current is flowing through a rod or plated conductor or semiconductor.