Toyota develops next-generation engine valve mechanism

June 19, 2007 Toyota has developed a new form of valve actuation for internal combustion engines which it claims improves fuel efficiency by 5 to 10 per cent, enhances throttle response, reduces CO2 emissions, and boosts power by at least 10 per cent. To be known as Valvematic, the new design offers a variable valve lift mechanism created through combining VVT-i (Variable Valve Timing-intelligent), which controls the timing of intake valve opening/closing, with a new mechanism that can also control the intake valve lift volume. The first application of Valvematic will be in a new 2.0-litre engine being introduced in the near future.

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