In order to set a stage for what follows, let's first revisit some of the fundamentals involved in how valve timing relates to power output. And to further clarify how "power" is defined in the ...

Hyundai claims it has created the world's first Continuously Variable Valve Duration (CVVD) engine technology, which it says increases engine performance by 4 percent and efficiency by 5 percent. The ...

Getting air in and exhaust gases out of the combustion chamber under all speeds and driving conditions is essential for a car’s fuel efficiency and low emissions. That’s why virtually all Chevrolet ...

Valve train improvements are an important part of the continued efficiency advancements of internal combustion engines. Today's electronics allow more precise control and different approaches to valve ...

GM has announced that all V-8 powered Chevrolet and GMC trucks now feature variable valve timing (VVT) for the 2010 model year. A quick trip back to engineering 101 reminds us that VVT is a piston ...

The problem is as old as the internal combustion engine itself: Static valve timing is always a compromise. Figures that produce good power at lower engine speeds aren't ideal for higher-rpm operation ...

Alanson Partridge Brush. Remember that name. Because it was according to his patents that Cadillac put into production something that Honda and Alfa Romeo took decades to match. Mr. Brush's invention?

COVID-19 has been unkind to even the healthiest of businesses, but to already-troubled companies like the storied Harley-Davidson, the pandemic came as an unwelcome wildcard. With its dated lineup and ...

Decades ago (OK, half a century or more), there was a product advertised in many of the performance magazines called the Varicam. The idea was a set of springs attached to a centrifugal device that ...