Suzuki DF250SS Suzuki Technologies Deliver Outstanding Performance, VVT Variable Valve Timing

DF250SS PRODUCT INFORMATION

Suzuki Technologies Deliver Outstanding Performance

VVT (Variable Valve Timing)

Suzuki engineers started o￿ in a big way by designing the DF250SS based on a big block 4.0-liter engine, the largest displace- ment found in this class. Äis V6 engine features an aggressive cam profile, delivering maximum output and performance at high rpm, and Suzuki’s advanced Variable Valve Timing (VVT), provides the DF250SS with the torque needed to boost low- to mid-range acceleration. VVT provides this boost by adjusting the intake valve timing, allowing intake valves to open before the exhaust valves are fully closed. Äis process creates a momentary overlap in the timing where both sets of valves are open. With VVT, this overlap can be increased or

decreased by altering		Advance
			40° Movable Angle
intake timing with the	Lift	Ex Valve			Intk Valve
camshaÅs to optimize
timing for low- and	Valve				Retard
mid-range operation.
				Crank Angle
			Valve Overlap

		with VVT
TORQUE	without VVT
LOW	MID	HIGH

ENGINE SPEED

Diagram of VVT Mechanism

VVT Actuator

Rotation Direction

Camshaft Position Sensor

Intk Camshaft

Intk Camshaft	Ex Camshaft
	Crankshaft		Retard
			Advance
	Crankshaft Position Sensor		Oil	Oil
		Drain	Filter	Pump

	Crank	ECM
	Position		Duty Control
	Throttle Opening Angle
Throttle Sensor		Target
	Water Temp
Water Temp Sensor		Advance	Oil Control Valve (OCV)	Oil Pan
	Cam Position
Map Sensor*	Manifold Pressure	Feed
		back
		Actual Valve		Engine Oil Flow
		Timing
				Signal
*Manifold Absolute Pressure Sensor

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