Mitsubishi LANCER EVOLUTION-VII 2001, Техническое руководство

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ENGINE -
Control System
1-16
LIST OF COMPONENT FUNCTIONS
Name Function
ECU Engine-ECU Uses the signals input from the various sensors to control operation of
actuators in accordance with the driving conditions.
Sensors Ignition switch-IG Detects the ON/OFF position of the ignition switch. When this signal
is input to the engine-ECU, power is supplied to components such as
the injectors, air flow sensor, idle speed control servo and crank angle
sensor.
Ignition switch-ST Detects whether the engine is cranking. The engine-ECU controls the
fuel injection, throttle valve opening angle and ignition timing to the
appropriate settings based on this signal.
Air flow sensor Detects the amount of intake air (volumetric capacity) by means of a
Karman vortex meter. The engine-ECU controls the basic injector drive
time based on this signal and on the engine speed.
Barometric pressure sensor Detects the barometric pressure by means of a semiconductor
diffusion-type pressure sensor. The engine-ECU detects the vehicle’s
altitude based on this signal, and uses this to correct the fuel injection
amount so that the optimum air/fuel mixture ratio is obtained for that
altitude.
Oxygen sensor Detects the concentration of oxygen in the exhaust gas by means of
zirconia and platinum electrodes. The engine-ECU judges whether the
air/fuel mixture ratio is at the optimum theoretical ratio based on this
concentration.
Intake air temperature sensor Detects the temperature of the intake air by means of a thermistor. The
engine-ECU corrects the fuel injection amount to the correct amount
corresponding to the intake air temperature based on the voltage
output from this sensor.
Engine coolant temperature
sensor
Detects the temperature of the engine coolant by means of a
thermistor. The engine-ECU detects how warm the engine is based on
the signal from this sensor, and uses this to control the fuel injection
amount, idle speed and ignition timing.
Throttle position sensor Detects the throttle valve opening angle by means of a potentiometer.
The engine-ECU controls the throttle valve and also determines the
optimum fuel injection for the vehicle’s degree of acceleration based
on the voltage output from this sensor.
Vehicle speed sensor Detects the vehicle speed by means of a magnetic rheostatic element.
Camshaft position sensor Detects the No. 1 cylinder compression top dead centre position by
means of a hall element.
Crank angle sensor Detects the crank angle by means of a hall element. The engine-ECU
controls the injectors based on the signal from this sensor.
Alternator FR terminal Detects the energising duty ratio of the alternator field coil.
Power steering fluid pressure
switch
Detects whether there is a power steering load present by means of a
contact switch.
A/C switch Detects the ON/OFF condition of the A/C.