Components; Flywheel; Charge Coil; Crankshaft Position Vcsensor (Cps) - BRP Johnson J30TEL4SUA 2007 Service Manual

ENGINE CONTROL

COMPONENTS

COMPONENTS

Flywheel

The flywheel contains permanent magnets which
energize the charge coil, the crankshaft position
sensor (CPS) coils, and the alternator stator.
Once the flywheel exceeds a minimum cranking
RPM, the flywheel's magnetic lines of force pass
through the ignition plate components to produce
voltage in those circuits.
1. Permanent magnets (Not shown)

Charge Coil

The charge coil consists of many windings of wire
wrapped around a metal lamination. Once the fly-
wheel exceeds a minimum cranking RPM, the fly-
wheel's magnetic lines of force pass through the
charge coil windings to produce approximately
300 V of alternating current. This voltage is sup-
plied to the power pack to operate the system.
1. Charge coil
70
Crankshaft Position Sensor (CPS)
There are two crankshaft position sensors
installed below the flywheel rotor. When the reluc-
tor bar on the flywheel passes the sensors, a sig-
nal (voltage pulse) is generated and sent to power
pack. This is the basic signal that is used to deter-
mine the engine speed and the crankshaft angle.
The sensors send a basic signal to the power
pack for determining the ignition timing.
1
1. Crankshaft position sensors
001851

Power Pack

The power pack has several basic functions. It
stores and distributes the voltage received from
the charge coil and operates the caution system.
The power pack uses electronic switches (SCRs),
activated by crankshaft position sensors output, to
select the correct ignition coil primary winding for
firing.
1
1. Power pack
001653
1
001654
1
001655