Mazda 3 since 2003
1. Operation and maintenance of the car
2. Engine
2.1. General description of new engines of the L8, LF and L3 models
2.2. Mechanical part of engines
2.3. Appendix 1
2.4. Appendix 2
2.5. Appendix 3
2.5.1. Control system
2.5.2. Principle of work and purpose of some components of a control system
2.5.2.1. Sensor of provision of a cam-shaft (SMR)
2.5.2.2. Sensor of provision of a cam-shaft (ICR)
2.5.2.3. Regulator of idling (IAC)
2.5.2.4. Management of an air duct with variable characteristics (VAD)
2.5.2.5. System of start-up with variable characteristics (VIS)
2.5.2.6. A control system of hashing of air on an admission (VTCS)
2.5.2.7. Control of the mechanism of change of phases of gas distribution
2.5.2.8. Management of fuel injection
2.5.2.9. Management of switching off of the air conditioning system
2.5.2.10. Control of the electric fan
2.5.2.11. Local network of the controller (CAN)
2.5.2.12. System of onboard diagnostics
2.5.3. Codes of malfunctions
2.6. The Z6 engine – a mechanical part
2.7. Lubrication system
2.8. Cooling system
2.9. System of an admission
2.10. Fuel system
2.11. System of production of the fulfilled gases and system of decrease in toxicity
2.12. System of ignition
2.13. Control system
2.14. Tables
3. Transmission
4. Running gear
5. Steering mechanism
6. Brake system
7. Onboard electric equipment
8. Body
 








2-5-2-8-upravlenie-vpryskom-topliva.html

2.5.2.8. Management of fuel injection

Main 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.

"previous page
2.5.2.7. Control of the mechanism of change of phases of gas distribution
following page"
2.5.2.9. Management of switching off of the air conditioning system




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