The Jacobs® Cylinder Deactivation (CDA) system aids in meeting stringent fuel economy standards such as the new ultra-low NOx standards and drive cycle testing.
- 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
Fuel savings of 2.76 percent were returned in the first SAE J1321 standardized fuel consumption testing of Jacobs® CDA, using fully loaded comparison trucks on a highway route in North America. Similar tests on a distribution route returned fuel savings of two percent.
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.
Cylinder Deactivation is just one of the technologies on Jacobs latest demonstration vehicle which will be touring the U.S.
Tech Talk: CDA
Learn how CDA can help meet upcoming emission regulations by improving emissions and aftertreatment temperature warmup while decreasing fuel consumption.
CDA with Skip Fire Operation
Watch Jacobs' collapsing bridge rig test with Skip Fire operation on a heavy-duty diesel valvetrain.
CDA for Type 5 Valvetrains
Watch Jacobs rig test showing CDA for type 5 valvetrains.