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.
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
- The mechanism is capable of individual cylinder control and is dynamically switchable between cylinders
- An optional feature of Jacobs® Lost Motion VVA
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.
CDA in Action
Cylinder Deactivation is just one of the technologies on Jacobs latest demonstration vehicle which will be touring the U.S.
Learn More
Watch Jacobs' collapsing bridge rig test with Skip Fire operation on a heavy-duty diesel valvetrain.
CDA Improves Fuel Economy and Lowers Emissions with Proven Technologies