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Products and solutions, 2005-04-26, 02:44 PM

ThyssenKrupp Presta develops continuously variable valve control

The new European emissions standard EU5 puts stricter requirements into place for the environmental compatibility of vehicle IC engines. Responding to this at an early stage, ThyssenKrupp Presta developed the Presta DeltaValveControl, a continuously variable mechanical valve control system.

The Presta DeltaValveControl varies engine valve lift and opening angle depending on load. This makes it possible to control gasoline-engine load via the valve opening. It is therefore no longer necessary to throttle valve intake, as is the case in most engines today. In particular in part-load operation, this leads to a considerable reduction in pumping losses and thus to lower fuel consumption. Furthermore, in IC and diesel engines, variable valve timing permits faster valve intake and higher exhaust gas recirculation rates. This enhances engine efficiency and combustion while significantly reducing the share of hazardous emissions.

The Presta DeltaValveControl can be mounted as a separate module on an existing cylinder head. If a suitable engine control system exists, fully variable operation is easy to implement with only minor modifications to the cylinder head. Other advantages of the system are low cost and fast implementation on existing engines. With the Presta DeltaValveControl, ThyssenKrupp Presta has developed a forward-looking product for IC engines today and in the future.

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