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This paper describes a newly developed electrified powertrain that incorporates various energy-saving improvements and is intended for use on a 2013 model year EV. Based on a 2011 model year EV that was specifically designed and engineered as a mass-produced EV, this powertrain integrates the traction motor, inverter and charging unit to achieve a smaller, lighter package for expanding application to more vehicles. Integration of the motor and inverter in particular reduced the part count for enhanced assembly ease, in addition to reducing heat transfer, noise and vibration. The specific features described in the paper are the three points below. Improving the layout of the inverter parts in order to downsize and integrate the inverter with the motor. Reducing the transfer of heat from the motor to the inverter. Reducing the excitation forces of the motor and optimizing the inverter for noise and vibration.

A new series of 6 cylinder direct injection 8.4 liter diesel engines have been designed by Isuzu Motors Limited. Naturally aspirated, turbocharged and turbocharged-aftercooled versions, have been developed to meet the needs of 8 to 16 ton GVW commercial vehicles, as well as industrial and marine applications. These engines cover the range of 147 - 200 kw (195 - 270HP) output. The design objectives for these engines included such features as high output, better fuel economy, high reliability and durability, as well as minimum weight and cost. This paper deals with the design, development and performance aspects of these engines.

This paper presents the results of recent investigations carried out at Isuzu Motors Ltd. into the reduction of noise radiated from exhaust system of heavy duty diesel truck. Radiation noise from the exhaust system is considered to be originated from the following vibrations. One is the vibration transmitted from exhaust manifold and the other is the vibration excited by fluctuation of inside gas pressure. Each contribution to the noise is analysed in conjunction with experimental results. Also presented are the results of a study into the optimum way of isolating the vibration and the practical way of damping by using laser holographic interferometry technique.