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

Comments

Load Line & Why it is Important

Merchant ships have a marking on their hull know as the Plimsoll line or the Plimsoll mark, which indicates the limit until which ships can be loaded with enough cargo, internationally, the Plimsoll line on a ship is officially referred to as the international load line. Every type of ship has a different level of floating and the Plimsoll line on a ship generally varies from one vessel to another. All vessels of 24 meters and more are required to have this Load line marking at the centre position of the length of summer load water line. There are two types of Load line markings:- Standard Load Line marking – This is applicable to all types of vessels. Timber Load Line Markings – This is applicable to vessels carrying timber cargo. These marks shall be punched on the surface of the hull making it visible even if the ship side paint fades out. The marks shall again be painted with white or yellow colour on a dark background/black on a light background. ...

Bilge Injection Valve

Bilge Injection is a valve that enables the engine room bilges to be pumped out directly overboard in the event of an emergency such as flooding. The valve is normally fitted to the end of a branch connection with the main sea water suction line. This enables large main seawater cooling pumps to be used as a bilge pump in an emergency. Emergencies like fire and flooding involve the use of seawater. If there is a fire, seawater is the biggest resource of water available in the sea. Similarly, if it involves flooding of the engine room, cargo spaces or any other place on the ship for that matter; you would again require pumping the sea water out of the ship. In both these cases, you require pumps. There are two valves in close proximity namely main injection valve and bilge injection valve. Both of them have their own independent controls. The diameter of the bilge injection valve is kept nearly 66% of the main valve diameter which draws water directly from the sea th...

Difference Between A, B & C-Class Divisions?

IMO Symbol A Class Division IMO Symbol B Class Division SOLAS has tables for structural fire protection requirement of bulkheads and decks. The requirements depend on the spaces in question and are different for passenger ships and cargo ships. The Administration has required a test of a prototype bulkhead or deck in accordance with the Fire Test Procedures Code to ensure that it meets the above requirements for integrity and temperature rise. Types of Divisions: "A" Class "B" Class "C" Class "A" Class: "A" class divisions are those divisions formed by bulkheads and decks which comply with the following criteria: They are constructed of steel or equivalent material They are suitably stiffened They are constructed as to be capable of preventing the passage of smoke and flame to the end of the one-hour standard fire test. they are insulated with approved non-combustible materials such that the average tempera...

Marine Engineering

Search This Blog