Wednesday August 31 – 8.30-9.30 hrs – Aula Magna

	Koei Saga Managing Officer Toyota Motor Corporation Japan

Energy management of Toyota Hybrid System

Abstract:
Toyota has marketed HV starting from Prius since 1997. Our goal is to contribute to spreading personal mobility to all over the world, simultaneously to provide the solution to GHG, energy resource shortage and emission problems.
Toyota’s practical target is to introduce the power-train whose fuel economy is extremely higher than the conventional gasoline engine system, and its efficiency is also continued to be improved. In order to realize our target, the reduction of energy usage is necessary by not only improvement of each HV component such as engine, battery, motor/generator and inverter, but innovation of control method to use them in maximum efficiency balance. Each HV
component unit is controlled by its control system and HV system management control can realize the best balance between system efficiency and “fun to drive” feeling. Each control system is developed by thorough design reviews, proper size simulators such as SILS, HILS, and finally actual vehicle test including VRS. The results are feed backed into improvement of each component. This process is repeated without any compromise for the target.The experience of the system balance control method contributes to establish more complex system such as PHV or FC, or system control of fail-safe mode. Toyota will continue to introduce more new HV and PHV into the market.

.

.

Koei Saga biosketch:
Koei Saga was born February 1, 1951 in Oga City, Akita Prefecture. He earned a master’s degree in Mechanical Engineering from the Musashi Institute of Technology in March 1977 and joined Toyota Motor Corporation (TMC) the following month.
Mr. Saga began his career at TMC developing engines and other drivetrain components. He led a team that developed the world’s first mass-produced super-charger equipped engine in 1984, and in 1995 helped draft the technology scenario that resulted in the Prius. In 1997, he was transferred to the Racing Engine Development Department of the Motorsports Division and became general manager of the department in January 1999, the year TMC announced it would enter Formula One racing. He became general manager of the Motorsports Division in June 2000.
In January 2001, he became general manager of the Engine Engineering Division 2, where he supervised 4-cylinder engine development and in January 2003, he became general manager of the New Engine Development Division, where he was charged with developing improved gasoline and diesel engines. He was assigned to the Hybrid Vehicle Engineering Promotion Division in June 2004. Mr. Saga was made a managing officer in June 2008.
Mr. Saga believes in his engineers including younger team members when he is facing major challenges. He seeks to set clear goals and streamline the development process, using bold hypotheses and meticulous analysis. He is grateful for having had the opportunity to help develop Toyota’s hybrid vehicle technology and thereby contribute to society and the environment.
Mr. Saga enjoys motorsports, is also a Chunichi Dragon’s baseball fan and enjoys golfing and skiing. He and his wife, Miyuki, have two sons, the elder being a race-car driver.