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.
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
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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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