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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2-1-5-3-osnovnye-osobennosti-vozdukhovoda-s-peremennymi-kharakteristikami-vad-l3.html

2.1.5.3. The main features of an air duct with variable characteristics (VAD) (L3)

Fig. 2.57. The VAD system of the Mazda 3 car with the L3 engine: 1 – VAD system gate; 2 – the operating electromagnetic valve of the VAD system; 3 – vacuum chamber of the VAD system; 4 – backpressure valve of the VAD system


The control system of VAD opens the gate in the case of the air filter with high frequencies of rotation of the engine for increase in an air stream. The system consists of the gate, the electromagnetic valve of management, the vacuum chamber and the backpressure valve. Usually, the core under the influence of a spring opens the gate (fig. 2.57).

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2.1.5.2. System of an admission
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2.1.5.4. Executive mechanism of system (VAD) (L3)