Page 1285 - Foton Workshop Manual - Tunland (AT)

ENGINE CONTROL SYSTEM - ENGINE PREHEATING SYSTEM 11-59

ENGINE PREHEATING SYSTEM 11

HOW IT WORKS

The intake air heater

The intake air heater is mounted at the joint of the
air inlet and can improve the starting performance
and white smoke control in low temperature
environment.It preheats the engine intake air before
staring the cool engine, and quickly reaches the
temperature required for ignition. The temperature
of the intake heater is limited to a critical value. If
the engine temperature is below 10 degrees, the
intake heater can remain energized for several
minutes after the engine starts. The successful
starting heater can ensure the stability of the
warm-up process, reduce smoke exhaust and
reduce combustion noise during cold starting
operation. If the startup is not successful, the
protective circuit of the intake heater is disconnected,
preventing excessive discharge of the battery.

The preheating relay

The preheating relay is used to control the operation
of the intake heater, ensure the effective cold start
and shorten the warm-up time, which is closely
related to the exhaust emissions.The warm-up time
is a function of the coolant temperature. During the
engine starting or actually running, the opening time
of the intake heater is determined by a series of
parameters including fuel injection and engine
speed. It collects information from the ECM to control
the operation of the intake heater, thereby improving
the fuel economy and dynamic performance.

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