Page 208 - Understanding Automotive Electronics
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SENSORS AND ACTUATORS 6
Figure 6.4
Circuit Diagram for
MAP Sensor Using
Strain Gauges
FPO
360˚ in one revolution. However, one full engine cycle from intake through
exhaust requires two complete revolutions of the crankshaft. That is, one
complete engine cycle corresponds to the crankshaft angular position going
from zero to 720˚. During each cycle, it is important to measure the crankshaft
position with reference to TDC for each cylinder. This information is used by
the electronic engine controller to set ignition timing and, in most cases, to set
the fuel injector pulse timing.
UNDERSTANDING AUTOMOTIVE ELECTRONICS 195
