Sices HS 315, Техническое руководство

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Technical Handbook 151
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ST.132 (START).
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ST.133 (STOP).
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ST.134 (IDLE).
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ST.135 (PREHEAT).
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ST.136 (PRELUBE).
As follows, the controls are described individually.
Note: for electronic engines connected via CAN0 CAN-BUS to HS315, many of these controls
are managed directly through the CAN-BUS connection, and therefore it is not necessary to
configure the outputs. If the outputs are configured, the board controls them, although the
engine is connected in CAN-BUS.
The board can control an external heating system, to maintain the temperature of the engine
cooling liquid above a specific temperature. This to heat the engine, so that it is ready to deliver
at any time.
This function is disabled if the board does not acquire the temperature of the cooling liquid
(neither via CAN-BUS from the engine control board nor through the analogue inputs -
AIF.1110 or AIF.1111 functions).
The function is configured via P.0355 and P.0356 parameters:
•
P.0355: temperature below which the heating system must activate.
•
P.0356: temperature above which the one the heating system must deactivate.
The threshold P.0356 must be set to a value higher than P.0355: the two thresholds guarantee
a hysteresis to avoid continue turn the heating system on/off due to minimum temperature
shifts. The heating activates if the temperature drops below the threshold P.0355 for at least
one second; it turns off when the temperature rises above the threshold P.0356 for at least
one second.
This function is always active, even when the engine is running: it is clear however that when
the engine is running, the temperature of the coolant will always be higher than P.0356
threshold, therefore the heating system will always be disabled.
The board can control the engine pre-lubrication pump. In practice, before starting the engine
(so when the mechanic pump of the engine is not working yet), the board can control an
auxiliary pump to have the lubricating oil already under pressure when the engine starts
moving.
To enable this function, it is necessary to set P.0242 parameter ("Maximum duration of pre-
lubrication cycle") to a value other than zero.
The board activates the pre-lubrication control at the beginning of the starting cycle, along with
the opening of the fuel solenoid valve. The output is active for the entire pre-lubrication cycle:
it ends after P.0242 seconds, or if the board realizes that the lubricating oil is under pressure.
The board considers that the lubricating oil is under pressure if at least one of the following
conditions is met:
•
If the board acquires the measurement of the lubricant pressure (from the engine
control unit via CAN0 CAN-BUS, or via the analogue inputs, AIF.1000 or AIF.1001
functions):
o
If the lubricant low-pressure threshold is set (P.0339 <> 0), when the
measured pressure is higher than the threshold.