Jacobs Vehicle Systems® has introduced Active Decompression Technology® (ADT®), enabling heavy-duty commercial vehicles to benefit from an engine stop-start system and eliminating engine-shake at both start-up and shutdown. In addition to improving fuel economy and reducing emissions, ADT also improves cold engine starts, reduces loading and wear on engine components during start-up, and makes start-up faster.
Jacobs’ ADT device incorporates valve actuation technologies proven over many millions of miles and can be cost-effectively added to many engine platforms.
Stop-start engine technology, which automatically switches off the engine when it would otherwise be idling, is widely adopted by automotive manufacturers, however, it is less common in heavy-duty commercial vehicles. This is largely due to the intrusive engine and cabin-shake experienced whenever a heavy-duty diesel engine starts or stops, and because of the cost of technologies needed to mitigate increased wear-and-tear on the starter motor, ring-gear, and battery. ADT significantly reduces these issues.
Extensive testing has shown that ADT reduces the magnitude of engine-shake during shutdown by 90 percent, which is when vibrations transmitted to the cabin are of greatest frequency and strength. This has the additional benefit of preventing disturbance to drivers sleeping in cabs overnight when there are automated engine starts and stops to maintain battery charge.
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SOURCE: Jacobs Vehicle Systems
