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
2.1.1. Mechanical part of engines
2.1.2. Mechanism of change of phases of gas distribution
2.1.3. Lubrication system
2.1.4. Cooling system
2.1.5. Fuel system
2.1.5.1. General information
2.1.5.2. System of an admission
2.1.5.3. The main features of an air duct with variable characteristics (VAD) (L3)
2.1.5.4. Executive mechanism of system (VAD) (L3)
2.1.5.5. Electromagnetic valve of system (VAD) (L3)
2.1.5.6. Backpressure valve of system (VAD) (L3)
2.1.5.7. Fuel knot
2.1.5.8. Block of the fuel pump
2.1.6. System of production of the fulfilled gases and system of decrease in toxicity
2.1.7. Electric equipment of engines
2.2. Mechanical part of engines
2.3. Appendix 1
2.4. Appendix 2
2.5. Appendix 3
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
 








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2.1.5.7. Fuel knot

Fig. 2.61. Fuel knot of the Mazda 3 car: 1 – fuel tank; 2 – backpressure valve; 3 – block of the fuel pump; 4 – fuel nozzle; 5 – quencher of pulsations; 6 – relay of the fuel pump; 7 – control socket; 8 – quick-detachable connector; 9 – cover of a jellied mouth of the fuel tank


The fuel knot of the car consists of the block of the fuel pump of high pressure, the fuel tank, fuel nozzles and fuel connecting tubes (fuel-supply lines). From the fuel tank the fuel pump under pressure gives fuel to the fuel highway from where it through nozzles comes to cylinders. Nozzles dose and spray fuel. When giving tension the needle rises by a solenoid winding, passing fuel. The amount of fuel is defined by duration of an impulse during which the nozzle is open. Further fuel flows back in the fuel tank through two metal tubes located under the car bottom. The fuel pump is installed in the fuel tank (fig. 2.61).

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2.1.5.6. Backpressure valve of system (VAD) (L3)
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2.1.5.8. Block of the fuel pump