![]() Using this measuring method, the magnetic field difference between these two is calculated with two Hall effect speed sensors mounted on a surface. The constant change between the two hall sensors can be directly related to the speed of the movement. Because of this, a potential difference appears across the semiconductor material at right angles to the magnetic field, from both the magnet and the flow of the electric current. This is caused by their magnetic field reacting to the different fields of the magnet.Īs a result of the now curved movement, there are more electrons present on one side of the semiconductor material. If the semiconductor material is then placed between the two poles of a magnet, instead of moving in a straight line as before, the electrons will be pushed to one side and into a curved line, forming a curved path as they move through the material. The electricity creates its magnetic field as it becomes electrically charged – known as a semiconductor. When an electric current is flowing through any material, the electrons within that current will naturally move in a straight line. The Hall Effect is caused by the Lorentz force, this acts on the moving charge carriers within the magnetic field. How does a Hall Effect Speed Sensor Work?Ī Hall Effect sensor uses a magnetic field-dependent semiconductor. They can be found in applications where contact-free speed measurement is required in areas that can be hard to access.ĭifferent speed sensors use different types of technology, the sensors that we can offer use magnetic or hall effect position sensing technology. They work by providing a voltage measurement corresponding to the magnetic rotational speed. Like many devices, a speed sensor is an integral part of onboard systems. They are present in various types of commercial and motorsport vehicles. For all you 16Vers, this table was taken from the E36 handbook hopefully it will prove to be applicable to the E30 as well.A speed sensor is a type of position sensor which is used to measure rotational speed. The Motronic 1.7 system was exclusive to the 318iS before being fitted to the E36. Vehicle Speed input from instrument clusterĪutomatic Transmission Torque Converter Lock-up Switch Start input- to ignition switch and coil from OBC However, the small differences that crept into production during the lifetime of Motronic 1.3 mean that a few extra wires are in place, to control features such as ABS. Motronic 1.3 uses the same engine loom as Motronic 1.1, and therefore the 55-pin plug remains the same. Unlike Jetronic and Motronic 1.0, pin 1 is now at the end furthest from the cable.Įngine Speed output- to instrument cluster Motronic 1.1 uses a much chunkier plug, fitting 55 pins into three rows. The Motronic 1.0 ECU employs a 35-pin plug to connect to all the engine bay components. ![]() Note that the ECU connector is accompanied by the C104, a small 3-pin plug that provides data for the Instruments.Ĭancels deceleration fuel shutoff when A/C clutch is on ![]() The control model uses a 25-pin plug, with Pin 1 at the cable end. Jetronic's primitive management system only controlled fuelling, so the ECU is little more than an injection control unit. ![]()
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