Activation of Variocam Plus

Activation of VarioCam Plus







The VarioCam Plus camshaft adjustment system which is familiar from the 911 Carrera (997) is also employed on the Boxster S (987). The DME control unit controls infinite camshaft adjustment and valve lift of the inlet camshafts.

The requirements imposed on engine design with regard to high performance combined with good driving comfort, compliance with emission regulations and reduced fuel consumption lead to conflicting objectives in developing engines. The idea of creating a variable engine spurred the development of VarioCam Plus (premiered on the 911 Turbo 996).

Such an engine is intended to provide peak performance in terms of torque and power output while also offering optimized emissions and fuel consumption in frequent use in stop and go traffic or on country roads.

VarioCam Plus features vane adjuster and switchable hydraulic tappet control elements for infinite adjustment of the timing of the intake valves and switching the maximum valve lift of the intake valves between 3.6 mm and 11.0 mm on the basis of a map. The infinite vane adjuster, which is familiar from the 911 Carrera and Cayman S, has an adjustment range of 40°.