30
On previous systems, it was not possible to
initiate the first combustion cycle until a crank
angle of approx. 600˚ - 900
o
was reached. The
quick-start sender wheel enables the engine
control unit to recognise the position of the
crankshaft relative to the camshaft after a
crank angle of 400˚ - 480
o
.
This allows the first combustion cycle to be
initiated sooner and the engine to start more
quickly.
Quick-start sender wheel
The quick-start sender wheel is attached to the
camshaft. It supplies a signal which enables
the engine control unit to determine the posi-
tion of the camshaft relative to the crankshaft
more quickly and, in combination with the
signal which the engine speed sender supp-
lies, to start the engine more quickly.
Drive units
The quick-start sender wheel comprises a
twin-track sender wheel and a Hall sensor. The
sender wheel is designed so that two tracks
are located side by side. In the position where
there is a gap in one track, there is a tooth in
the other track.
Twin-track sender wheel
Track 1
Track 2
Tooth
Gap
Hall device
Track 2
Hall device
Track 1
SSP207/84
Hall sensor
