- They are hard, abrasive particles.
- It is also possible to contaminate a clean marine residual fuel oil with catalyst particles during transport. For example, if steamship fuel (frequently containing catalyst particles) has been transported by barge prior to moving a clean heavy fuel oil for a diesel powered ship, the barge bottom sediment will be mixed with the clean fuel oil and will contaminate it.
- Cat-fines are generally small, very hard, and quite abrasive to pumps, atomizers, piston rings and liners.
- (30 ppm) of alumina in the bunkered fuel oil is the upper limit for successful treatment and engine operation.
- The average particle size, as well as the concentration, greatly impacts the wear rate of engine components.
- Small sized catalyst particles (1-10) micron range typically cause accelerated wear in injection pumps and injectors and only moderate increases in cylinder assembly wear, such as piston rings, piston grooves, and liners.
- The larger sized catalyst particles, in the ten to seventy (10-70) micron range, typically causes very accelerated wear rates in the cylinder assembly area. Also on injection pump inlet valves, exhaust valve seating areas, and turbocharger turbine blading.
The electrohydraulic control mechanisms of the ME engine replace the following components of the conventional MC engine: Chain drive for camshaft Camshaft with fuel cams, exhaust cams and indicator cams Fuel pump actuating gear, including roller guides and reversing mechanism Conventional fuel pressure booster and VIT system Exhaust valve actuating gear and roller guides Engine driven starting air distributor Electronic governor with actuator Regulating shaft Engine side control console Mechanical cylinder lubricators. The Engine Control System of the ME engine comprises: Control units Hydraulic power supply unit Hydraulic cylinder units, including: Electronically controlled fuel injection, and Electronically controlled exhaust valve activation Electronically controlled starting air valves Electronically controlled auxiliary blowers Integrated electronic governor functions Tacho system Electronically controlled Alpha lubricators
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