Toyota's new fuel-efficient engines outlined

In order to improve the fuel efficiency of their vehicles, Toyota outlined a new range of newly-developed, fuel-efficient engines with improved thermal efficiency. Those new engines will achieve 10% of fuel consumption and they'll be used in models (possibly the Passo and the Vitz/Yaris) scheduled for minor change this year and by next year, a total of 14 new variations will be introduced to the world market.

Toyota's new 1.0L petrol engine

Toyota's new 1.3L petrol engine

Seen in the pics is the 1.0L petrol engine (above), which is co-developed by Daihatsu, that achieves a maximum thermal efficiency of 37% thanks to the use of a tumble flow-generating intake, cooled EGR system, and an improved compression ratio. Couple that with the idling stop feature and it achieves about 30% of fuel consumption.

Then, there's the new 1.3L petrol engine (below) which uses the Atkinson Cycle commonly used in their hybrid cars. With this, the new 1.3L petrol engine provides and enhanced expansion ration and reduces waste heat through a high compression ratio of 13.5:1. It can be utilized with the use of a tumble flow-generating intake, cooled EGR, and VVT-iE (Variable Valve Timing - intelligent Electric) technology. Couple that with the idling stop feature and about 15% of fuel consumption is improved.

Source: Toyota