GENERAL INFORMATION
GLOW
SYSTEM <4D5>
The self-regulating glow system
enables the vehicle to start ideally at low temperature
by preheating the glow plug at super speed. When the ignition switch is
turned to the ON position,
the engine-ECU supplies electric currents and controls the diesel
preheat indicator lamp illumination
in accordance with the engine coolant temperature. The control
resistance wire built in the
glow plug has a higher resistance as the glow plug temperature becomes
higher. Because of this,
the currents in the heater wire gradually decrease. The glow plug is
stabilized at the specified temperature.
After the engine start at low temperature, the current going to the glow
plug is controlled
to perform the stable combustion.
SYSTEM DIAGRAM
GLOW SYSTEM
<4N1>
The glow control unit of the glow system
employs the method of energising the glow plug
of each cylinder respectively.
The glow control unit carries out the
duty control to the energisation of the glow plug,
in accordance with the signal from the engine-ECU.This achieves the
optimum voltage of the glow
plug in accordance with the engine conditions at the after glow to
stabilize the combustion.
Also the combustion noise or hydrocarbon (HC) emissions are
reduced.
The engine-ECU determines the glow start, the glow time and
the energisation duty cycle
of the glow plug.
SYSTEM DIAGRAM
