The New Toyota 1.0L L3 ESTEC Gasoline Engine

Authors

Y. Sasaki, S. Adachi, K. Nakata, K. Tanei,
S. Shibuya, Toyota Motor Corporation, Aichi, Japan

Year

2014

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 777

Summary

In recent years, improving vehicle fuel economy is becoming much more important for meeting the challenging CO₂ emission target of 95g/km by 2020. One essential way to improve vehicle fuel economy is the enhancement of engine thermal efficiency. Therefore, many studies have been conducted in automotive industry, all around the world, in order to enhance the engine thermal efficiency. Basically, to achieve high engine performance while keeping low fuel consumption, development of engine technologies to enhance knock resistance to allow higher compression ratio usage is required. It is well known that the exhaust loss increases as a result of retarded ignition timing to avoid knocking in case of high compression ratio. Therefore, some countermeasures, such as lowering combustion temperature by applying cooled EGR, are required in order to maintain the benefit of high compression ratio. It is also proven that a high tumble air flow leads to fast combustion and reduces fuel consumption. Moreover, it prevents occurrence of knocking, which contributes to enhancement of engine performance.

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