Difference Between RTA to RT-flex engines

	RTA	RT-flex
Developing fuel oil pressure	One fuel pump per cylinder	Fuel pumps on supply unit
Storing of fuel oil		Fuel rail
Timing of injection	Fuel cam on camshaft	WECS-9520/ICU
Developing pressure for exhaust valve activation	One activating pump per cylinder	Servo pumps on supply unit
Storing of servo oil pressure		Servo rail
Timing of exhaust valve	Valve cam on camshaft	WECS-9520/VCU
Fuel pump actuator	Regulating power/speed	Keeping fuel rail pressure
Power/speed control	Fuel pump	Fuel quantity piston
Timing of starting air	Staring air distributor	WECS-9520
Reversing	Reversing of cam	WECS-9520
Alarm & monitoring system	External	External
Emergency control	By mechanic shaft and cams acting on pneumatic valves of the engine control	Backup panels deliver maneuvering signals and fuel commands to WECS inputs independent from the RC inputs channels
Load signal	RC receives load signal from angle transmitter on intermediate shaft	WECS supplies a fuel command feedback as load signal to the RC system
VIT, VEC	Functions provided in RC system	Functions and VEO included in WECS
Wring from engine to external	Individual cables	Bus system

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