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2-5-2-8-upravlenie-vpryskom-topliva.html
2.5.2.8. Management of fuel injectionMain characteristics
There are two working hours of system of injection of fuel: «synchronous injection» and «asynchronous injection». Regulation with feedback use on barometric pressure and a signal of the back sensor of concentration of oxygen is entered.
Synchronous injection
The PCM block defines a choice of the moment of time of injection and amount of the fuel, synchronized with an angle of rotation of a cranked shaft, on the basis of the following signals during steps of an admission and release of each cylinder:
– position of the crankshaft, a mass consumption of air, temperature of cooling liquid, air temperature on an admission.
Asynchronous injection
The PCM block defines a choice of the moment of time of injection and amount of fuel on the basis of the following signals (without synchronization with a crankshaft angle of rotation):
– the provision of a butterfly valve, a mass consumption of air, temperature, temperature of cooling liquid, air temperature on an admission.
Correction on barometric pressure
Purpose: to keep stability of operation of the engine
Working conditions: always.
Action: lower barometric pressure, big correction.
Regulation with feedback use on a signal of the back sensor of concentration of oxygen
Purpose: ratio control air / fuel for ensuring the maximum productivity of catalytic converter.
Conditions: in a feedback zone.
Action: target tension of the back sensor of concentration of oxygen.
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