Hot Rod

Variable Valve Timing For Circle Track Engines

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 ...
Hot Rod

Why Variable Valve Timing? IVC Systems' 1999 Breakthrough Helps to Answer

To celebrate HOT ROD's 75th anniversary, we teamed up with CASTROL GTX to bring you some of the stories that exemplify the core of what HOT ROD is and reflect the brand's influence on America's car ...
CNET

Variable valve tech and what it does in your car

Brian Cooley is CNET's Editor at large and has been with the brand since 1995. He currently focuses on electrification of vehicles but also follows the big trends in smart home, digital healthcare, 5G ...
autoevolution

Variable Valve Timing Helps Chevrolets Breathe Better

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 ...
webBikeWorld

Fast Filings: Suzuki’s Hayabusa Could Get Variable Valve Timing

The bike that won the title of “world’s fastest production motorcycle” at the turn of the century could soon sport a bit of tech that will support hi-rev performance at lower emissions… but at what ...
webBikeWorld

Techy Stuff: Aprilia’s Getting Variable Valve Timing

We’ve just heard that Piaggio Group, parent company to Aprilia, is working on a mechanical variable valve timing (VVT) system – and the first to reap the benefits of the tech will be none other than ...
autoevolution

Ducati Introduces the Desmodromic Variable Timing Technology

Ducati has made public the new Variable Valve Timing technology we wrote about only two days ago. While one of the small mysteries was whether the D from the DVT acronym stood for Ducati, Dynamic or ...
autoweek

This is the future of variable valve timing

Despite current efforts to revisit light-vehicle fuel economy standards enacted during the Obama administration, there have been no changes to the law, and there might not be for years, as the wheels ...
JSTOR Daily

Variable Valve Timing for Fuel Economy Improvement — The Mitchell System

The Mitchell mechanical Variable Valve Timing (VVT) system is described. The way in which it exploits variable angular velocity to change valve timing is explained. The system was used in a programme ...
Motor Trend

GM V-8 Variable Valve Timing

But because today's near-ubiquitous OHCs, driving valves from above, enjoy inherent efficiency advantages over one in the block operating them from below through pushrods while enabling higher rpm for ...
Jalopnik

The Forgotten Story Of Cadillac's Brass Era VTEC

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?