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The oldest Burmeister & Wain diesel Engine Start up
1907 year built

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Burmeister and Wain air-blast injection diesel engine from 1907 located in a water pumping station at Alborg, Denmark being started in 1996 for the 150th anniversary of B&W. At the time it was the oldest known B&W diesel to operate. It is very similar in design to the engine successfully built and operated in 1897 by Doctor - Engineer Rudolf Diesel.

Because it is an air-blast injection engine, compressed air from 45-62 bar (about 650-900 psi) is used to do the actual fuel injection. Fuel and blast air is delivered to the top of the injector by separate pumps, and when the cam opens up the injector, the very high air pressure at the injector forces the fuel down into the injection nozzle and into the highly heated air inside the combustion chamber. The blast air is actually delivered by an external air line to the engine during startup, and is disconnected when the engine is running to allow the internal air pump to take over.

The air blast diesel engine in operation
1904 year built

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16 hp at 235 rpm
Bore 215 mm
Stroke 340 mm
110V Crompton dynamo and switchboard

Air-blast injection Diesel built by Grazer Wagon & Maschinenfabriks-Aktiengesellschaft (Graz, Austria)to MAN drawings. Lighting plant for a hospital installed in October 1904, later served in a sawmill until compressor damage by lube oil explosion.

The engine is running on air blast. The fourth rocker is not visible on this video clip, it is hidden between camshaft and cylinder head. Lift of injection needle is about 1 mm, this is the reason why you hardly see it lift. Look closely at 5:56. Injection timing is -5/+35 degrees crankshaft rotation. This protracted injection of fuel over 40 degrees is one of the reasons why these engines run so smoothly.

What you hear is a recording loop: noise in the foreground is intake air, remotely you hear the ding of the compressor first stage intake valve. Otherwise the engine is very quiet, somewhat like a steam engine.

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