Variable valve timing is one of the key technologies in the further development of automotive engines. A variation of valve lift profiles and variable valve timing in the engine operation map offer ...

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 ...

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 ...

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 ...

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, ...

Valve overlap—that crucial interval when both the intake and exhaust valves are open, expressed in degrees of crankshaft rotation—is typically a fixed parameter and always a compromise. For example, ...

The US market Hyundai Elantra comes with a 2.0 liter DOHC engine with continuous variable valve timing. The CVVT unit controls the intake valve timing by advancing and retarding the intake cam in ...

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 ...

Everybody kind of knows what it is and has a picture in their mind of what a camshaft looks like, but maybe not a full understanding of what it really does or the technological advances that ...