Ford Corsar Repair Manual page 257

E.C.C.S. DESCRIPTION
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E.C.C.S. Components
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KA24E
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Connector
Isolation bushing
L~ontact
plate
SEC336A
9
0
'L
Rich
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Ideal ratio
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Lean
Pressure Regulator
The pressure regulator maintains the fuel pressure at 299.1 kPa
(3.05 kg/cm2, 43.4 psi). Since the injected fuel amount depends
on injection pulse duration, it is necessary to maintain the
pressure at the above value.
Exhaust Gas Sensor
The exhaust gas sensor, which is placed into the exhaust
manifold, monitors the amount of oxygen in the exhaust gas.
The sensor has a closed-end tube made of ceramic zirconia.
The outer surface of the tube is exposed to exhaust gas, and the
inner surface to atmosphere. The zirconia of the tube compares
the oxygen density of exhaust gas with that of atmosphere. and
generates electricity. In order to improve the generating power
of the zirconia, its tube is coated with platinum. The voltage is
approximately 1V in a richer condition of the mixture ratio than
the ideal air-fuel ratio, while approximately O V in leaner condi-
tions. The radical change from 1V to O V occurs at around the
ideal mixture ratio. In this way, the exhaust gas sensor detects
the amount of oxygen in the exhaust gas and sends the signal
of approximately 1V or O V to the E.C.U.
Mixture ratio
S E F 2 8 8 D
Fuel Pump
The fuel pump assembly consists of an intake filter, a low pressure
vane pump element feeding a high pressure "G-rotor" pump element
motor, relief valve and check valve. This combination of low and
high pressure pump elements in series minimizes fuel pulsati~~rr,
therefore eliminating the need for a low pressure dampener.
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Power Transistor
1
The ignition signal from the E.C.U. is amplified by the power
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transistor, which turns the ignition coil primary circuit on and
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off, inducing the proper high voltage in the secondary circuit.
The ignition coil is a small, molded type.
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1