man b& w me engine
ME Engines – the New Generation of Diesel Engines
INTRODUCTION
The introduction of the electronically controlled camshaft-less low speed diesel engines, which is now gaining momentum, is a milestone in diesel technology that deserves a place in history like
Rudolf Diesel’s first engine in Augsburg, the
1912 motor vessel Selandia, the introduction of turbocharging on two-stroke diesels in 1954, and the first SCR (Selective Catalytic NOx
Reduction) systems on ships in 1989.
This paper will outline how MAN B&W takes advantage of this new technology in its MErange of engines by combining traditional, proven technologies with enhanced electronic control so as to design engines which, while being both production-friendly and operationally easy to handle, yet will provide all benefits to the owner and operator of contemporary and future software achievements. Fig. 1 shows the first such commercial ME-C engine in
Frederikshavn, Denmark.
Camshaft-controlled diesel engines have been the state of the art ever since the birth of reciprocating machinery and have been refined and developed ever since. However, a mechanical cam is fixed once made and, in spite of various mechanical and hydraulic add-on devices like VIT, etc., timing control possibilities are limited with mechanical cams. Not least fuel injection pressure control and variation over the load range have limitations with a camcontrolled engine.
Therefore, the main purpose of changing to electronic control is to ensure fuel injection timing and rate, as well as the exhaust valve timing and operation, exactly when and as desired, see Fig. 2.
Especially with respect to the fuel injection rate,
the control system has been so designed that it is possible to maintain a rather high injection pressure also at low load, without the limitation from the camshaft-controlled engine, where this would result in too high pressure at high load.
Both the ‘cam angle, inclination and length’
INTRODUCTION
The introduction of the electronically controlled camshaft-less low speed diesel engines, which is now gaining momentum, is a milestone in diesel technology that deserves a place in history like
Rudolf Diesel’s first engine in Augsburg, the
1912 motor vessel Selandia, the introduction of turbocharging on two-stroke diesels in 1954, and the first SCR (Selective Catalytic NOx
Reduction) systems on ships in 1989.
This paper will outline how MAN B&W takes advantage of this new technology in its MErange of engines by combining traditional, proven technologies with enhanced electronic control so as to design engines which, while being both production-friendly and operationally easy to handle, yet will provide all benefits to the owner and operator of contemporary and future software achievements. Fig. 1 shows the first such commercial ME-C engine in
Frederikshavn, Denmark.
Camshaft-controlled diesel engines have been the state of the art ever since the birth of reciprocating machinery and have been refined and developed ever since. However, a mechanical cam is fixed once made and, in spite of various mechanical and hydraulic add-on devices like VIT, etc., timing control possibilities are limited with mechanical cams. Not least fuel injection pressure control and variation over the load range have limitations with a camcontrolled engine.
Therefore, the main purpose of changing to electronic control is to ensure fuel injection timing and rate, as well as the exhaust valve timing and operation, exactly when and as desired, see Fig. 2.
Especially with respect to the fuel injection rate,
the control system has been so designed that it is possible to maintain a rather high injection pressure also at low load, without the limitation from the camshaft-controlled engine, where this would result in too high pressure at high load.
Both the ‘cam angle, inclination and length’