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

2-1-5-6-obratnyjj-klapan-sistemy-vad-l3.html

2.1.5.6. Backpressure valve of system (VAD) (L3)

Fig. 2.60. Backpressure valve of the VAD system: 1 – backpressure valve; 2 – green; 3 – white; 4 – inlet collector; 5 – vacuum chamber of the VAD system

The backpressure valve (unidirectional) keeps vacuum in the vacuum chamber of the VAD system. The backpressure valve allows air to pass only from the vacuum chamber of the VAD system to an inlet collector (fig. 2.60).

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2.1.5.5. Electromagnetic valve of system (VAD) (L3)

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2.1.5.7. Fuel knot