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2-5-2-8-upravlenie-vpryskom-topliva.html 2.5.2.8. Management of fuel injectionMain characteristics
There are two operating modes of system of injection of fuel: "synchronous injection" and "asynchronous injection". Regulation with use of feedback on the barometric pressure and a signal of the back sensor of concentration of oxygen is entered.
Synchronous injection
The PCM block defines the choice of timepoint of injection and amount of fuel, synchronized with an angle of rotation of a bent 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 the choice of timepoint 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 use of feedback on a signal of the back sensor of concentration of oxygen
Purpose: control of a ratio air / fuel for ensuring the maximum productivity of catalytic converter.
Conditions: in a feedback zone.
Action: output tension of the back sensor of concentration of oxygen.
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