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1 As the demand for so-called eco-cars has been increasing recently, new hybrid transaxle P610 has been developed to achieve outstanding fuel economy and an excellent driving performance. P610 was installed in the 4th generation Prius, the first car to implement TOYOTA's new development strategy, TNGA (Toyota New Global Architecture). In order to accomplish the goal, radical reduction of mechanical loss, size and weight, dual-axle motor structure are adopted to draw out the potential capability of the THS (Toyota Hybrid System) to the maximum extent possible. Furthermore, placing the compact power train low, which is realized by installed the PCU(Power Control Unit) on top of the transaxle, led to provide the low center of gravity of the vehicle and excellent driving performance.

Recently, due to mounting concerns regarding the environment and energy conservation, demand for compact and hybrid vehicles with good fuel economy has been increasing. Toyota Motor Corporation has developed its first hybrid transaxle for installation in sub-compact class vehicles. This new hybrid transaxle is both smaller and lighter than the P410 hybrid transaxle for compact class vehicles, including the 2009 Prius. This was accomplished by creating new designs of the gear train, motor, and motor cooling system, and by adopting advanced technology. This paper describes the major features and performance of this transaxle in detail.

A new hybrid transmission has been developed for New compact class vehicles. The development of this transmission has been aimed at improving fuel economy and achieving the weight reduction and compact size. In order to achieve these goals, the gear train and motor have been newly designed and advanced technology applied. This paper describes the major features and performance of this transmission in detail.

1 A new hybrid transmission (P310) has been developed for FWD 3-liter engine class sports utility vehicles. The development of this transmission has been aimed at improving power performance and fuel economy, achieving the world's top-level weight reduction and compact size, while maintaining high torque capacity. In order to achieve these goals, the gear train and motor have been newly designed, and advanced technology has been applied. Moreover, this hybrid transmission achieves seamless acceleration and quiet performance. This paper describes the major features and performance of this transmission in detail.