2-Step Variable Valve Actuation

Jacobs' Two-Step Variable Valve Actuation (VVA) system is for OEMs challenged with meeting future transient emissions and fuel economy targets at a lower overall system cost. 

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JVS's 2-Step Variable Valve Actuation Technology

Performance benefits of Jacobs’ 2-Step VVA

  • Reduces fuel consumption
  • Optimizes compression ratio vs load
  • Improves transient response
  • Improves tail pipe emissions by keeping the aftertreatment system hot during low load operation
  • Reduces engine-out NOx emissions
  • Available for multiple valvetrain types
  • Provides many benefits of a fully-flexible VVA system with a less complex, lower cost system
2-step VVA performance graph

How Jacobs’ 2-Step VVA works

Using Jacobs’ proven mechanisms, a variable lift valvetrain provides the means to meet exhaust thermal management, engine performance and emissions needs with minimal changes to the base engine, with the goal of reducing the size and cost of the aftertreatment system leading to reduced overall system costs.

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Download this information package for more details and technical information about Jacobs’ 2-Step Variable Valve Actuation.