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

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

GM files a patent for advanced cylinder deactivation, aiming to make V-8 engines much more efficient without sacrificing ...

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

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.

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 ...

Is the V8 lifter nightmare finally over? One 2026 Chevy Silverado owner dug into his VIN data and found the news every truck ...

COLUMBUS, Ind.--(BUSINESS WIRE)-- Cummins Inc. (NYSE: CMI) today announced the signing of an agreement to acquire Jacobs Vehicle Systems (JVS), a subsidiary of Altra Industrial Motion Corp., and a ...

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 ...

We share the real reason why modern engines are failing in cars from Toyota, GM, Hyundai, Kia, and Nissan.We cover the major ...