Electronic governor enhances marine engine speed control
Due to a failure of a Caterpillar Hydraulic Governor on the Tug Vessel “Te Matua”, operated by South Port NZ, Emee NZ Ltd of Mossburn, was consulted to check out the possibility of an improved, reliable, readily available, cost-wise and serviceable system. Having deliberated and sourcing suitable and reliable hardware involved to substitute the original system, it was found that the movement of the Caterpillar 3606 Engines Fuel Injection Pumps mechanisms demanded a high torque to move such from idle to full throttle. The requirement was also to have a system that originally was air control to the Bridge, superseded by simple “Rotational Dial” and have simple 4–20mA wiring connection. Other air control levers and parts subject to age failure were removed. Recommendation and Solution It was decided to use a combination of a GAC ACB 2001 12Ft Lb Actuator and an AXIOMATIC AX100310 Unidirectional Digital Control for each engine to supersede the original equipment. The combination of both these products together with suitable developed programed firmware and a mechanically driven encoder has now made reliable use of this vessel. This equipment was fitted to both Engines and to date has more than proved their worth in speed control which incidentally this vessel is used extensively for moving large ships within the Island Harbour complex and narrow channel entrance. Installation Installation of the Emee System is very simple, with a Manufactured Actuator Bracket fitted to each engine with linkage, also an enclosure for the required wiring and having the Axiomatic Controllers externally mounted for access. The Axiomatic units are totally encapsulated protecting the internal hardware from the sea environment. This is a major plus to eliminate corrosion and damage. A further feature is an emergency “override key switch” which in the event of Bridge Control failure will put the engine […]