Toyota Valvematic next-generation Engine Valve Mechanism
Toyota announced today that it has developed Valvematic , a variable valve lift mechanism created through combining VVT-i (Variable Valve Timing-intelligent), which continuously controls intake valve opening/closing timing, with a new mechanism that continuously controls the intake valve lift volume. In the case of a new 2.0-liter engine developed by Toyota, Valvematic—which further evolves the gasoline engine—improves fuel efficiency by 5% to 10% (depending on driving conditions), reduces CO2 emissions, boosts output by at least 10% and enhances acceleration responsiveness. Toyota plans to introduce Valvematic shortly, starting with a new vehicle model featuring a 2.0-liter engine.
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 gasoline engine and transmission lineup by 2010.