Engine
Bravo-
Brava <fp ™
Fuel feed system 2000 range
The control unit self-diagnostic system checks signals from the sensors and compares them with permitted
limit values:
- fault indication upon start-up
- warning light on for 4 seconds indicates test stage
- warning light off after 4 seconds indicates no faults in components that could alter values required
by emission control regulations
- warning light on after 4 seconds indicates fault.
- fault indication during operation
- warning light on indicates fault
- warning light off indicates no fault in components that could alter values required by emission
con-
trol regulations.
- recovery
- the control unit defines recovery type on each occasion according to the faulty component type
- recovery parameters are controlled by non-faulty components.
Control of cylinder balance when idling
On the basis of signals from sensors, the injection control unit controls the evenness of torque at idle
speed by altering injector control times.
Control of judder
On the basis of signals from the sensors, the injection control unit corrects the amount of fuel to be in-
jected with the aim of improving handling by reducing jerkiness during driving.
The correction is achieved by adjusting the fuel pressure regulator and altering injector control times.
Control of electric balance
On the basis of battery voltage, the injection control unit alters idle speed to ensure sufficient current de-
livery by the alternator under conditions of high power uptake by appliances.
Idle speed is altered by adjusting fuel pressure and altering injector control times.
Control of turbocharger wastegate
At various engine service speeds, the injection control unit processes the signal from the turbo sensor and
determines the amount of fuel to be injected by adjusting the fuel pressure governor and injector control
times.
The control unit also controls the opening of the wastegate on the turbocharger via the control solenoid in
order to optimise performance under all service conditions.
Control of throttle closure upon engine power-off
When the engine is turned off (ignition turned to OFF), the injection control unit control closure of the
throttle valve on the air intake port by means of a solenoid.
This action limits annoying engine shake as the engine is turned off
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Print n° 506.670/22
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