TOYOTA DEVELOPS NEXT-GENERATION ENGINE VALVE MECHANISM

TOYOTA DEVELOPS NEXT-GENERATION ENGINE VALVE MECHANISM

'Valvematic' Achieves High Fuel Efficiency and Dynamic Performance

TOYOTA MOTOR CORPORATION (TMC) recently announced that it has developed
Valvematic, 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.

While conventional engines control air intake using a throttle valve,
Valvematic adjusts the volume of air taken in by continuously controlling
the intake valve lift volume and timing of valve opening and closing.  This
ensures optimal performance based on the engine’s operational condition,
thus helping vehicles achieve both high fuel efficiency and dynamic
performance.

The first application of Valvematic will be in a new 2.0-litre engine being
introduced in the near future. This new system further evolves the Toyota
petrol engine and improves fuel efficiency by between 5 and 10 per cent
(depending on driving conditions), reduces CO2 emissions, boosts power
output by at least 10 per cent and enhances throttle response.

Toyota positions global environmental preservation and initiatives toward
energy diversification as a priority management issue in terms of its
corporate social responsibility.  As a part of its efforts to reduce CO2
emissions through high fuel efficiency and to achieve cleaner exhaust
emissions, Toyota plans to completely revamp its petrol engine and
transmission lineup by 2010.

Via: TOYOTA MOTOR CORPORATION