Technology Demonstrator

Jacobs’ Active Decompression Technology (ADT) allows drivers to experience smoother start-ups with faster starting times and engine shutdown without engine-induced cabin vibration.

Benefits:

• Eliminates engine-shutdown-induced cabin vibration
• Improves driver satisfaction
• Increases engine cranking speed for easier start-up
• Improves cold start
• Lowers cranking torque & current draw
• Reduces starter system wear
• Reduces crank and bearing starting loads and wear
• Simple, cost-effective design
• Compliments start-stop fuel savings strategies
• Increases driver willingness to use optional start-stop

CDA leverages  Jacobs’ well-established componentry to disable engine valves in selected cylinders which allows 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.

• A 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