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1.5L REVOTORQ ENGINE
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D. Water Pump
The water pump is a simple centrifugal pump driven
by belt. The pump circulates the engine coolant
when it is driven by the engine.
The water pump uses centrifugal force to send fluid
to the outside while it spins, causing fluid to be
drawn from the center continuously. The inlet to the
pump is located near the center so that fluid return-
ing from the radiator hits the pump vanes. The
pump vanes pushes the fluid to the outside of the
pump, where it can enter the engine.
The fluid leaving the pump flows first through the
engine block and cylinder head, then into the radia-
tor and finally back to the pump.
Water pump flow Characteristics
Pump Speed
in RPM
Discharge in
LPM
Inlet Pressure
in Bar
4200
120
1.2
E. Temperature Sensor
A semi-conductor material changes its resistance
when exposed to variable temperature source.
Resistance decreases as temperature increases.
Temperature sensor provides engine operating
temperature input to the ECU.
Corrections for injection parameters are done by the
ECU based on coolant temperature to run the
engine with maximum efficiency at all temperatures.
F. Water Box
The thermostat and temperature sensor are
mounted on the water box. The water box is
mounted on side of cylinder head. It’s a supportive
component to the temperature sensor