Since the beginning of hot rodding, gearheads have endeavored to increase the performance of internal combustion engines through the optimization of valve timing. It's been proven time after time that ...
The first production car engine with variable valve timing (VVT) came from Alfa Romeo in 1980. It was installed in the fuel-injected Alfa Romeo Spider. Before this, a few experimental systems existed, ...
Harley-Davidson has filed a patent application for a variable valve timing (VVT) V-twin engine, possibly for the Sportster to improve economy and reduce emissions. The iconic American manufacturer has ...
SAE Transactions, Vol. 112, Section 3: JOURNAL OF ENGINES (2003), pp. 124-134 (11 pages) An experimentally derived map of the engine volumetric efficiency is usually employed to control the A/F ratio ...
Downsizing and turbocharging. For a car nut, those two words spell trouble. Most automakers, however, think otherwise. Mazda tries to keep the N/A flame alive, and so does Toyota. If you’re living in ...