Santana PS-10, Руководство по обслуживанию

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6C-22 ENGINE FUEL AND EMISSION CONTROL SYSTEM
SYSTEM FUCTIONS
Self-diagnosis - BLINK CODE
The control unit system of self-diagnosis checks the signals
received from the sensors against the admitted limit data
(see 6C-45).
Fuel temperature control
When fuel temperature is over 75ºC, control unit orders
pressure regulator to reduce pressure level (not injection
time). If the temperature goes above 90 ºC, power is reduced
to 60%.
Coolant temperature control
When the temperature rises above the following, the con-
trol unit:
-98ºC - switches on electro-magnetic fan.
-105ºC - lights up refrigerant temp. warning light.
Amount of injected fuel control
According to the signals coming from the sensors and the
programmed values, the control unit:
-controls the pressure regulator.
-varies "pilot" injection time up to 2200 rpm.
-varies "main" injection time.
Minimum regime control
The control unit uses the signals coming from the sensors
and regulates the amount of fuel injected:
-controls the pressure regulator.
-varies the electro-injectors injection times.
Within certain limits, the regime will take the battery tension
into account.
Fuel interruption when the pedal is released
(cut-off).
When the accelerator pedal is released, the control unit
acts as follows:
-interrupts the feed to electro-injectors.
-reactivates the feed to electro-injectors before reaching
minimum regime.
-controls the fuel pressure regulator.
Cylinders balancing to a minimun control
Depending on signals received from sensor, control unit
controls torque regularity at idleg speed:
-varies fuel ammount injectors (injection time).
Regularity of engine rotation control (anti-chattering)
This guarantees the regularity of engine rotation at constant
regime during increase of revs. From sensor signals the
control unit determines the amount of fuel to inject via:
-the pressure regulator.
-electro-injector opening time.
Exhaust fumes control
With rapid acceleration and according to signals received
and engine revs, the control unit calculates the amount of
fuel to inject via:
-the pressure regulator.
-varies injection time.
Maximum regime limitation control
According to the number of revs, the control unit intervenes:
-at 4.250 rpm the control board limits the fuel load by
reducing the electro-injector opening time.
-at more than 5.000 rpm it deactivates electro-injectors.
Checking and regulation of rotation in acceleration
The regularity of progress is assured in each circunstance
by checking the regulation of pressure and electro-injector
opening time.
Thermostarter control
During the stages of:
-starting
-post-starting
the injection control unit temporizes the working of the
thermostarter control according to engine temperature.
Activation and deactivation of the air-conditioning
compressor (if fitted)
The control unit controls the air-conditioning compressor:
- activating and deactivating it when the corresponding
switch is selected.
- deactivating it (6 secs approx) during rapid acceleration
or need for full power, or if the engine refrigerant reaches
105ºC.
Fuel electro-pump control
Regardless of the engine rpm, the control unit:
-feeds the auxiliary fuel pump with the ignition key in 2nd
position
-excludes feed to auxiliary pump if the engine does not
start within several seconds
Fuel preheat control
Temporizes the diesel preheat function according to the
outside ambient temperature..
Piston position control
During each turn of the engine, the control unit recognises
that the piston is in explosion stage and sends the injection
sequence to the right cylinder.