AirMan PDS400S-6C3, Руководство по обслуживанию

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3. Electric System
3-2
(2) Injection pressure control
Injection pressure is controlled by controlling the fuel pressure in the common rail. The appropriate
pressure in the common rail is calculated based on the engine revolution speed and fuel injected
amount, and proper fuel amount is injected by the control of the supply pump and it is sent to the
common rail with pressure and being controlled.
(3) Injection time control
This control is conducted by calculation of fuel injection timing mainly based on engine revolution
speed and injection amount as a substitute of timer and control of injectors.
(4) Injection rate control
In order to improve combustion in cylinders, at first a little fuel is injected (pre-injection) to ignite,
and then once ignited, fuel is injected 2nd time (main injection). Control of injection timing and
injection volume is performed by controlling injectors.
(5) Maximum fuel injection amount
This is calculated by adjustment of initial starting injection amount in accordance with water
temperature and limitation of this maximum injection amount by boost pressure, and also control of
fuel injection amount at high altitude by barometric pressure.
(6) Inter-cylinder correction
This is not used for this model.
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