General Motors has filed a new patent that offers a look at how the company may be rethinking cylinder deactivation for its next generation of pushrod engines. The application, published by the U.S.

It has been just over a decade since GM V8 engine technology like cylinder deactivation and light-weight oils became standard, how have they impacted sales? This question was raised by a recent ...

GM has filed a patent application a variable displacement valvetrain system with rocker shaft porting and insert sleeves for engine cylinder deactivation. The patent application is tagged with patent ...

GM is hoping new technology can help improve fuel economy by up to 15 percent. Called Dynamic Skip Fire (DSF), the cylinder deactivation technology is being developed by Tula Technology, Inc. a ...