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Section 08 ENGINE MANAGEMENT (4-TEC)
Subsection 01 (OVERVIEW)
MAGNETO SYSTEM AND
POWER SUPPLY
The magneto is the primary source of electrical
energy. It transforms magnetic field into electric
current (AC).
The magneto has a 3 phase-delta wound stator on
18 poles. Capacity is 380 watts.
It supplies DC current to battery after being trans-
formed by the voltage regulator/rectifier. Refer to
CHARGING SYSTEM.
The battery then supplies all the electrical system
with regulated 12 Vdc.
OPERATING PRINCIPLE OF
ENGINE MANAGEMENT
A highly advanced EMS has been used to ensure
a high power output with cleanest combustion.
The EMS calculates the proper air/fuel mixture and
ignition timing for each cylinder separately. The
fuel is injected into the intake port of each cylinder.
NOTE:
On the 1503, PTO and magneto (MAG) are
on the same engine side (rear). Each cylinder is
referenced as 1 , 2 and 3 instead of PTO, CENTRE
and MAG. The numbers are stamped on the valve
cover.
1
R1503motr218A
2
3
1. Cylinder 1
2. Cylinder 2
3. Cylinder 3
NOTE:
The EMS includes an ECM (engine con-
trol module), sensors, injectors, electromagnetic
valves and ignition system.
AIR INDUCTION
4-TEC Naturally-Aspirated Engine
Air for combustion is drawn directly at the front
of the engine through one 52 mm throttle body.
The air flow is controlled by a throttle plate and an
idle bypass valve. The air continues through the
intake manifold, which contains the flame arrester
and goes into the cylinder head.
1
2
R1503motr216A
52 MM THROTTLE BODY
1. Idle bypass valve
2. Throttle position sensor (TPS)
4-TEC Supercharged Engine
Air for combustion is drawn at the back of the
engine by a mechanical driven supercharger. The
compressed air flows through one 52 mm throttle
body and is controlled by a throttle plate and an
idle bypass valve. The air continues through the
intake manifold, which contains the flame arrester
and goes into the cylinder head.
smr2004-Complete Line Up
393
www.SeaDooManuals.net
Содержание 2006 GTI
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