Description
(1) engine speed sensor
"a" 3 way connector
"Hall effect" sensor
Role
Role of the engine speed sensor
- To measure the speed of rotation of the engine
- Locate top dead centre (TDC) and bottom dead centre (BDC) of cylinders 1 and 4
Function
The target is composed of 32 pairs of magnetic poles distributed on its periphery, two poles being absent in order to mark the top dead centre of pistons 1 and 4
"b" detection of the signal
"c" magnetic signal
"d" magnetic track
"e" direction of rotation of the target
A high status corresponds to a south pole
The transition from high/low after the zone where both poles are absent indicate top dead centre
The passing of the north and south poles of the target in front of the engine speed sensor modifies the high status and low status engine speed sensor output voltage
The frequency of the square signals produced by the passing of the poles of the target constitutes the engine's speed of rotation
Connector
| channel number | allocation of channels of connector |
|---|---|
| 1 | earth |
| 2 | signal |
| 3 | supply +5V |
Programming/initialisation
Not applicable