The New PRIUS Powertrain: The New 1.8L ESTEC 2ZR-FXE Engine with the New Generation Hybrid System

Authors

Y. Ohta, S. Fushiki, S. Matsuo, TOYOTA Motor Corporation, Shizuoka, Japan

Year

2016

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 799

Summary

The New PRIUS Powertrain has adopted the new 1.8L ESTEC 2ZR-FXE engine with the new generation hybrid system. The new 4-cylinder engine achieves a high maximum thermal efficiency of 40% which is the world’s highest for a mass-produced gasoline engine. Obtaining a high engine thermal efficiency is of high importance for achieving customer’s satisfaction. Toyota Motor Corporation has started developing a series of engines which belong to its new development concept called Economy with Superior Thermal Efficient Combustion (ESTEC). Toyota has been developing fast combustion technologies to enhance the engine thermal efficiency for conventional vehicles and hybrid vehicles (HVs). Similar to other ESTEC engines, the new 2ZR-FXE engine utilises a large amount of exhaust gas recirculation (EGR) gas with uniform distribution by the new shape intake manifold to achieve a thermal efficiency of 40%. In addition, knock resistance has been improved and mechanical loss has been reduced by various component e.g. the new shape crank bearing. The new generation Toyota hybrid system is completely re-engineered to maximize the potential of THS (Toyota Hybrid System).