Geely EC718 2009 Workshop Manual page 633

Engine
2.11.3 System Working Principle
2.11.3.1 Starting System Working Principle
When the ignition switch in at "ST" position:
–
Power passes through the underhood fuse EF15 to starter
relay terminal No.87.
– Power passes through the underhood fuses EF01, EF18 to
the ignition switch wiring harness connector IP23 terminal
No.5.
–
Power passes through the ignition switch wiring harness
connector IP23 terminal No.4 to starter relay terminal No.
85.
– Starter relay terminal No.86 and the BCM harness
connector IP29 terminal No.11 is connected. When the
engine anti-theft locking system and vehicle Anti-theft
alarm system are not activated, BCM grounds the terminal
No.11, relay coil is provided with power and the relay pull-
in.
–
After the relay pull-in, the relay provides power through
terminal No.30 to the starter motor wiring harness
connector EN18.
– Starter motor electromagnetic switch is closed after power
provided between the battery and starter motor closed-
loop. Starter motor is grounded through the engine block.
When the power supply and ground conditions are meet,
the starter motor starts running and the engine starts.
Start motor working principle: The motor is a DC reduction
motor. The stator is a permanent magnet and the rotor is coil
windings located in the armature. Through the magnetic field
the coil excites the windings. Solenoid core is located inside
the drive cover to avoid dust, ice and splash of water. When
the switch is closed, the electromagnetic switch coil power
resulting a magnetic field, causing the core and fork move and
driving gear and the engine flywheel ring gear meshing. When
the electromagnetic switch main contacts are closed, the
battery to starter motor circuit is connected. The armature
rotates and through a reduction mechanism increases the
torque to drive the engine to rotate. With the starter motor
rotating, due to the driving gear and the engine flywheel ring
gear mesh, so the engine rotates. When the engine starts, the
driver gear overdrive in order to prevent the armature speed is
too high to damage the starter, at this moment the return spring
separates the drive gear. In order to prevent the speed is too
high to damage the starter, the ignition switch should be
immediately released after the engine starts.
Starting / Charging System JL4G18-D
2.11.3.2 Charging System Working Principle
Generator provides DC voltage to the vehicle electrical system
and maintains the battery charged. The voltage output is
controlled by the regulator integrated inside the generator:
– When the ignition switch is at "OFF" position: battery
voltage passes through the I/P fuse EF03 to the generator
harness connector EN07 terminal No.3. This voltage is the
regulator working power supply.
– When the ignition switch is at "ON" position and the engine
is not running:
1. Generator harness connector EN07 terminal No.3 still
has voltage. When the ignition switch is at "ON"
position, it provides IG1 relay terminal No.85 voltage.
The relay pull-in.
2. Battery voltage passes through the I/P fuse EF01, EF22
to IG1 relay terminal No.87, due to relay pull-in, relay
output passes the battery voltage through relay terminal
No.30, to the I/P fuse IF25, and then to the generator
harness connector EN07 terminal No.2. After the
magnetizing coil is provided with power, this voltage
produces a good magnetic field around the coil.
3. Generator harness connector EN07 terminal No.1 is
connected with the instrument cluster connector IP03
terminal No.13, so the EN07 terminal controls the
generator charging indicator. When the engine is not
running, the terminal provides a good ground, so the
charging indicator lights.
–
When the engine is running: Because the excitation coil
produces a magnetic field, so the stator coil produces
alternating voltage. Voltage regulator senses the voltage
and controls the field current. The AC voltage is generated
by the three stator coils. This AC voltage is converted to DC
voltage through the built-in rectifier. Adjusted by the voltage
regulator, the generator output voltage is applied to the
vehicle battery and the battery terminals power circuit. With
the generator working, generator harness connector EN07
terminal No.1 voltage and the charging indicators on both
sides is the same, thus the charging indicator loses ground
and off.
EC718/EC718RV EC715/EC715RV 10/2009
2-551