Saab Automobile Ab

Alf Hedlund

Karl Marforio

David Charles Viano

Kristina Wiklund

Mats F&auml;gerhag

In an ignition electrode arrangement at a cylinder in an internal combustion engine, for example an Otto-engine, a first electrode and a second electrode co-operate with each other, the first electrode being arranged on an ignition device secured to a cylinder head. Both electrodes are movable in order to enable a change in the size of the spark gap and/or the position of the spark gap. The electrodes are each manipulated by an operating device that is controlled by a control unit included in the ignition system of the engine.

Ignition electrode arrangement at an internal combustion engine

In an ignition electrode arrangement for a cylinder in an internal combustion engine, for example an Otto engine, a cylinder head ( ) bears a first electrode ( ) and a second electrode ( ) which interact with one another. At least the first electrode ( ) is arranged on an ignition means ( ) fastened in the cylinder head. According to the invention, the second electrode ( ) is movable relative to the cylinder head ( ) and the first electrode ( ) in order to make it possible to change the spark gap. The second electrode ( ) can be mounted on the cylinder head ( ) itself or on the ignition device ( ). The size of the spark gap is controlled during operation by the ignition system of the engine.

Spark electrodes with adjustable gap

For a safety belt ( ) in a vehicle, the belt is tightened in the event of a collision for at least 300 ms, at the same time as the maximum pull on the safety belt is limited to a predetermined value during the whole tightening process. This is made possible by a tightening device ( ) being arranged to be able to operate for at least 300 ms and by there being a load-limiting device ( ) between the tightening device ( ) and the belt.

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Skelleftea, Sweden

Alf Hedlund