Common rail system

Abstract

This paper outlines the operative principle of the Common Rail System and WECS (Wartsila Electronic Control System) that controls the engine performance of the common rail system. In comparison to classical engines the system has many advantages, such as: decreased fuel consumption, reduced engine weight, smoother running during low rpm, lesser maintenance costs, and most important is that the system provides considerable reduction of detrimental gas emission below the level prescribed by the MARPOL 73/78 Convention, from which it may be concluded that this system will to a steadily increasing extent be used on ships in the future. The electronic control system that regulates the quantity of injected fuel and the intervals of injection along with electronic regulation of the opening and closing of the exhaust valves have in the highest degree contributed to the reduction of detrimental gas emission.