Manuals through 2025 now available!
Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.
LEMON is the spiritual successor to CHARM, I recommend you try it!
Link:
lemon-manuals.la or
lemon-manuals.org.ua
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Ignition System: Description and Operation
The
ignition system consists of a Multi Point Injection (MPI) controller and its sensors, a
power transistor,
ignition coil, and
distributor. The distributor sends crank position information from the
Crank Angle Sensor (CAS) and piston location information from the Top Dead Center (TDC) sensor to the MPI controller. It also distributes coil secondary output. The Multi Point Injection Controller (MPI) regulates the entire ignition and
fuel injection system. It has the capability of igniting the fuel mixture according to different engine conditions during engine operation by delivering a variable electronic spark advance curve. The MPI controller has a built in microprocessor that continually receives input from the engine monitoring sensors. The computer then electronically advances or retards the
ignition timing to provide good driveability during operation. The amount of electronic spark advance provided by the MPI controller is determined by three input factors, coolant temperature, engine rpm, and manifold vacuum.