Electrohydraulically Actuated Valve Train

Internal combustion engines require valves to aspirate and discharge gases. Engine designers require a high degree of flexibility to improve efficiency, reduce pollutants, and optimize the use of renewable fuels. Currently, the gas exchange valves of four-stroke engines are controlled through camshaft drives. Despite some complex additional mechanics, the flexibility of such camshaft-driven systems remains limited. An electrohydraulically actuated valve train — the FlexWork valve train - was developed that enables completely free adjustment of stroke and timing, while at the same time being robust and cost-effective.