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Old 08 Feb 2014, 10:55 pm
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Default Re: Who Invented Variable Valve Timing (vtec)?

On Monday, February 22, 1999 8:00:00 AM UTC, Philnita wrote:
> Probably General Motors.
> David Malinovsky wrote:
> > A Trivia question, Honda lovers are so hot on VTEC. Who was the first
> > manufacturer to have variable valve timing on a production car? post your
> > answers and I'll tell you in a couple days

Guess work is rubbish!!! anyone can steal an idea and patent it!!
Fiat was the first auto manufacturer to patent a functional automotive variable valve timing system which included variable lift. Developed by Giovanni Torazza in the late 1960s, the system used hydraulic pressure to vary thefulcrum of the cam followers (US Patent 3,641,988).[5] The hydraulic pressure changed according to engine speed and intake pressure. The typical opening variation was 37%.
Alfa Romeo was the first manufacturer to use a variable valve timing systemin production cars (US Patent 4,231,330).[5] The fuel injected models of the 1980 Alfa Romeo Spider 2000 had a mechanical VVT system. The system was engineered by Ing Giampaolo Garcea in the 1970s.[6]
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