The crankshaft sensor serves to record the engine
speed and the position of the crankshaft. The control unit uses these values to
calculate the injection and ignition impulses.
The camshaft sensor is on the cylinder head and scans
a ring gear on the camshaft. This information is required, for example, for the
start of injection for sequential injection, for the triggering signal of the
solenoid valve for the pump-nozzle injection system and for cylinder-selective
The airflow meter is mounted between the air filter
housing and the intake manifold. It measures the amount of air that flows into
the engine. This is the basis for calculating the amount of fuel that has to be
fed to the engine.
Manifold air temperature sensor
The manifold air temperature sensor is
in the engine intake air system and records the air temperature. This value is
used by the engine management as a correction parameter for carburetion and
Coolant temperature sensor
The coolant temperature sensor is screwed
into the coolant system. The measuring tip juts into the coolant and records the
temperature. The control unit uses this value to adapt the amount of fuel to be
injected into the engine to the engine temperature.
Throttle valve sensor
Throttle valve sensors are attached to the
throttle valve axis and monitor the opening angle of the throttle valve. From
these values, the engine electronics calculates the amount of fuel to be
injected, dependent on further factors.
Knocking is an uncontrolled form of spark ignition
combustion. Since knocking leads to engine damage in the long term, it has to be
monitored. The engine control unit evaluates the voltage signals being sent by
the knocking sensor and controls the ignition point in a range just below the
so-called knocking limit.
Wheel speed sensor
The wheel speed is used by assistance systems such
as ABS and ASR as a speed value and by GPS systems to calculate the distance
covered. A sensor fault will lead to these systems failing. Which significantly
For reasons of operating safety and to increase driving
comfort, filling levels such as engine oil, coolant and wiper system water are
monitored using level sensors. These send a signal to the cockpit which
activates a signal lamp.
By 2010 the share of electronics in vehicles will be
make up more than 30% of the overall material value. The number of electronic
vehicle components is increasing with every vehicle that comes off the assembly
So that you can fall back on the HELLA quality you are used to, HELLA now also
has a range of oxygen sensors available.