Overview of New 1.8-liter Gasoline Engine
Aiming to create an engine capable of delivering one of the best performances in its displacement class, TMC has developed a new 1.8-liter gasoline engine that features advanced mechanisms such as Dual VVT-i (Variable Valve Timing-intelligent), provides torque-strong output, reduces CO2 emissions through high fuel efficiency, achieves cleaner exhaust emissions and is light and compact.
Main features of new engine
1) Torque-strong performance
While Dual VVT-i enables continuous control of optimum valve timing for various engine speeds and loads, abundant torque at low and medium speeds allows for easy-to-handle output, providing one of the best torque-strong performances in the 1.8-liter class.
2) Excellent fuel efficiency and clean exhaust emissions
The use of Dual VVT-i and ultra-light pistons, along with efforts to reduce friction loss among parts such as by using roller bearings in the rocker arm valve train, are aimed at achieving at least 5% greater fuel efficiency than that achievable by conventional engines and at achieving clean exhaust emissions (equivalent to 75% lower than the maximum allowed by 2005 emissions standards).
3) Reduced size and weight
Reduced exterior dimensions and weight have been achieved by modularizing the front section of the engine and using smaller-diameter spark plugs, etc.
http://www.toyota.co.jp/en/news/06/0613.html


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