The supercharged 4.2-liter V8 under the XKR’s hood features twin air intakes and continuously variable valve timing—mated to what Jag claims is a “class-leading” six-speed automatic paddle-shift ...

Cars are Andrew's jam, as is strawberry. After spending years as a regular ol' car fanatic, he started working his way through the echelons of the automotive industry, starting out as social-media ...

Variable valve timing (VVT) and variable valve lift (VVL) have very similar names, both referring to variable valve performance. Does that mean that they are basically the same thing? The are most ...

Hyundai figured out continuously variable valve duration in a production vehicle (or at least one about to hit production). increase in performance of 4 percent with 5 percent better efficiency, along ...

Set to debut in a new 1.6-liter 4-cylinder Smartstream turbo engine, Hyundai's new valve tech is able to continuously change the duration of valve openings to suit driving conditions, which Hyundai ...

Earlier this year, I wrote about the very first Continuously Variable Valve Duration, or CVVD, system from Hyundai. I claimed it to be the first production engine with the technology. As did Jason ...

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 ...

Both of these Silverado engines feature continuously variable valve timing and Active Fuel Management (AFM), which shuts down cylinders to improve fuel economy when only small amounts of power are ...

Hyundai last week announced that it has developed what it claims is the world’s first mass-production continuously variable valve duration (CVVD) technology. The company asserted the new valve tech, ...

Ducati has announced it will introduce new engine technology that will boost power and torque, improve fuel economy, reduce emissions and won’t affect servicing intervals. Ducati Testastretta engine ...

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 ...

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?