Jacobs Vehicle Systems - Technology

Variable Valve Actuation allows real-time adjustments to valve openings and closing, maintaining precise control of valve motion. By creating a hydraulic link between the cam and the valve, VVA precisely tunes the engine across its operating range. This allows the designer to extract superior performance from the engine.

VVA is one of an engineer’s most powerful and cost-effective tools for accomplishing vehicle system performance goals: meeting tightening emissions standards while maintaining fuel economy. Elegant in its simplicity, Jacobs Evolve VVA provides a means to achieve desired valve movement, integrating with minimal impact to engine overhead designs. What’s more, VVA enables the engine to utilize Homogeneous Charge Combustion Ignition (HCCI), with its potential to both lower emissions and reduce after-treatment system complexity.