Camshaft Hall Sensor, Basic Function - GF15.10-P-2001A

ENGINE ALL (CAR) 

Overview 

This document contains information on: 

• Location 
• Task 
• Structure 
• Function 

Location 

The Hall sensors are located on the cylinder head above the respective camshaft.

Task 

Through the pulse wheels on the camshafts, the Hall sensors contactlessly determine camshaft positions for the following functions:

• Camshaft adjustment
• Synchronization of ignition and injection sequence
• Recognition of ignition TDC (top dead center)
• Emergency engine start in case of defective crankshaft Hall sensor

Structure 

The Hall sensors are made up of a Hall sensor cast into a plastic housing with a 3-pin plug connection.

Function 

Detection of the camshaft takes place via the position of the camshaft pulse wheels. Via the evaluation of the Hall sensors, the individual cylinders can be assigned to the respective working cycle.