Cylinder Deactivation

Jacobs' Cylinder Deactivation (CDA) system aids in meeting stringent fuel economy standards such as the new ultra-low NOx standards and drive cycle testing.

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Jacobs Vehicle Systems Cylinder Deactivation Technology

Performance benefits of Jacobs’ CDA system

  • Key technology for meeting upcoming emissions standards
  • Fuel economy improvements through reduced pumping losses and friction
  • Faster engine and aftertreatment system warm-up
  • Improves combustion and fuel consumption in firing cylinders
  • Improves emissions by keeping the aftertreatment system hot during low load operation
  • Minimizes cooling of aftertreatment during coasting
  • Hydraulically actuated mechanism integrates into pushrod, rocker, or bridge
  • Modular with High Power Density® (HPD®) and compression release engine brake technology
  • Mechanism is capable of individual cylinder control and dynamically switchable between cylinders
  • An optional feature of Jacobs’ Lost Motion VVA
Cylinder Deactivation performance graph

How Jacobs’ CDA works

Cylinder Deactivation leverages Jacobs’ well-established componentry to disable engine valves in selected cylinders allowing a large engine to have the fuel economy of a smaller engine. Also, higher exhaust temperatures in operating cylinders maintain aftertreatment temperatures at low load conditions and start-up.  Cylinder Deactivation can be utilized in diesel engines as well as gasoline, natural gas, and ethanol-fueled engines.

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Download this information package for more details and technical information about Jacobs’ Cylinder Deactivation system.