GM has filed a patent application a variable displacement valvetrain system with rocker shaft porting and insert sleeves for ...

When cylinder deactivation returned decades later, it finally worked. It also fundamentally changed what a modern V8 was ...

When installing a performance cam, many owners lose the engine’s cylinder deactivation feature. Here’s why you may want to keep it active. Manufacturers of modern V-8 engines have realized that we don ...

General Motors has filed a new patent that offers a look at how the company may be rethinking cylinder deactivation for its ...

A recently filed patent details a new GM cylinder deactivation system that appears to be heading to the next-gen V8 engines ...

Today we have the incredible luck of choosing exactly the kind of car and powertrain we want. The auto industry was never this diverse in its offerings. This might mean that we should better inform ...

How does cylinder deactivation work? When not needed, the system shuts down fuel supply to the cylinders not being used and closes the valves. There are two ways to accomplish this: 1) rocker arm ...

Jacobs Vehicle Systems provides a closer look at how Cylinder Deactivation (CDA) and Active Decompression Technology (ADT) improves emissions, fuel economy and driver comfort in an International LT625 ...

Cummins Valvetrain Technologies reports positive results from further on-road testing of its Jacobs cylinder deactivation (CDA) technology. CDA for diesel engines is a new powertrain technology.

Manufacturers continue to develop advanced technologies that aid in the improved operational efficiency of heavy-duty commercial vehicles. This effort has been a priority for vehicle suppliers and ...

Testing of a sophisticated cylinder deactivation technology on a Cummins engine showed a 74% reduction in nitrogen oxides (NOx) emissions. Cylinder deactivation is viewed as one of the main strategies ...