REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Mazda 3 (2003 release)

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Mazda
	3
		Operation and maintenance of car
		Engine
			General description new engines models L8, LF, L3
				The mechanical part of engines
				Variable valve timing mechanism
					Variable valve timing
					The design of the variable valve timing mechanism
					Main features of the mechanism of variable valve timing
					The design of the variable valve timing mechanism
					The oil control valve (OCV)
				Lubrication system
				Cooling system
				Fuel system
				Exhaust and Emission
				Electric motors
			The mechanical part of engines
			Appendix 1
			Annex 2
			Appendix 3
			Engine Z6 - mechanical part
			Lubrication system
			Cooling system
			Intake system
			Fuel system
			Exhaust and Emission
			Ignition system
			Control system
			Tables
		Transmission
		Chassis
		Steering Gear
		Brakes
		Onboard electric
		Body

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The design of the variable valve timing mechanism

Fig. 2.31. The structural diagram of the valve timing mechanism: 1 - crankshaft position sensor; 2 - camshaft position sensor; 3 - the block of PCM; 4 - the oil control valve (OCV); 5 - actuator variable valve timing; 6 - an electrical signal; 7 - a hydraulic pressure

Variable valve timing mechanism includes an actuator oil control valve (OCV), crankshaft position sensor, camshaft position sensor and the block of PCM (Fig. 2.31, 2.32, and Table. 2.12).

Fig. 2.32. A block diagram of the hydraulic pressure system: 1 - the oil sump; 2 - the oil pump; 3 - oil line; 4 - the oil filter; 5 - the oil control valve (OCV); 6 - adapter of the oil control valve (OCV); 7 - camshaft; 8 - actuator variable valve timing; 9 - the cylinder block

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Main features of the mechanism of variable valve timing