Gknaerospace Sweden Ab

Wartsila Diesel International Ltd Oy

Peter Johansson

An airflow arrangement for a gas turbine engine in which air can be selectively directed to and from a bypass channel of the engine and into a duct communicating air into a compressor of a gas turbine engine.

Reversible bleed configuration

The invention concerns a transition duct for a multi-stage compressor of a gas turbine engine. Regions of the inner surface of the duct are provided with a predetermined and dissimilar surface roughness to optimise gas flow efficiency within the duct.

Zoned surface roughness

An improved valve rotation arrangement for providing valve rotation for a pressure medium valve in an internal combustion engine, especially a large diesel engine or gas engine, whereby the valve is opened under positive guidance for instance under the influence of a rocker arm and is closed by means of a spring, comprises a bearing arrangement for turnably journalling the upper part of a valve stem to the valve spring and a rotation mechanism supported to the cylinder head of the engine and arranged to provide valve rotation. The bearing arrangement comprises a slide bearing between a rotation element, arranged to the upper part of the valve stem, and a bearing housing element supported to the valve spring.

Growing community of inventors

Trollhättan, Sweden

Peter Johansson