Scania Cv Ab

Ola Jönsson

Andreas Dahl

Håkan Sarby

Ragnar Glav

Marcus Ahlin

Adam Wikström

Fredrik Birgersson

Manfred Klopotek Von Glowczewski

Bror Tingvall

Roger Johnsson

The disclosure concerns a method for vibration reduction in a compression ignition four-stroke internal combustion engine. The internal combustion engine comprises exhaust and intake valves controlled by exhaust and intake camshafts. The method comprises, when operating the internal combustion engine below a threshold rotational speed, steps of: changing a timing of the exhaust camshaft to advance closing of the exhaust valve, and —changing a timing of the intake camshaft to delay opening of the intake valve.

Vibration reduction in internal combustion engine

A method for generating engine acoustic emissions including the steps of providing a loudspeaker configuration () based upon the configuration of said engine, and feeding the said loudspeaker configuration () with signals for providing desired engine acoustic emission. Also a device, a computer program and a computer program product for performing the method.

Method and a device for generating engine acoustic emissions, a computer program and a computer program product

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Huddinge, Sweden

Ola Jönsson