For protecting our environment from global warming and air pollution, increasingly stringent automotive-related regulations have been issued year after year as requirements for further improvement in fuel efficiency and further reduction in emission gas. Efficient conversion from fuel energy to kinetic energy is required to reduce CO2 emission from automobiles. With its state-of-the-art technologies in combustion control and simulation that Hitachi group have fostered over many years, Hitachi Astemo Americas, Inc. offer a range of engine powertrain products meeting diverse engine designs for direct injection, port injection, and diesel combustion, to name just a few. To realize a highly efficient engine by reducing the conversion loss of fuel energy, we are carrying out comprehensive and multidisciplinary research.