Manufacturers like to use a lot of acronyms on their cars. Variable valve lift (VVL) and variable valve timing (VVT) are two of the most popular ones. These systems sound pretty similar, but what do ...

March 30, 2007 Over the last century of automobile development, we have seen an enormous range of valve actuation technologies, ranging from pushrod, through single then double overhead camshafts, ...

Internal-combustion engines are now all about the trade-off between power and efficiency. Until now, the tools to address that trade-off have been variable valve timing and variable valve lift, which ...

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 ...

VTEC stands for Variable Valve Timing and Lift Electronic Control and represents a variable valve control system developed by Japanese car manufacturer Honda for its gasoline engines. The system was ...

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 ...

The fifth generation of BMW's four-valve boxer engine will make its debut in the new R 1250 GS and RT. The latest evolution of its liquid-cooled boxer features increased capacity, more power and ...

It's springtime! Time to start working on your project car, learn a new wrenching skill, discover what everything is under the hood (and how it works), or just spruce up your daily driver. All month, ...

Hyundai's Continuously Variable Valve Duration (CVVD) is a breakthrough engine technology first used in the 2020 Sonata’s 1.6L turbo engine. Traditional engines use fixed valve timing, but modern ...

There is so much going on with internal combustion engines (ICEs) these days, it can give you a headache just reading about them. That's why we do the research for you and then cram it into bite-size ...