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In December 2006, Nissan announced its Nissan Green Program 2010 (NGP 2010), a mid-term environmental action plan that includes initiatives to reduce vehicle emissions. In line with this plan, the company intends to introduce a new and original hybrid system in fiscal year 2010. Specifically, this system-called the “Infiniti Direct Response Hybrid”-is a one-motor, two-clutch parallel hybrid system that eliminates the need for a torque converter. It will be featured in the 2012 Infiniti M35 Hybrid and provides the following advantages. 1 Significant improvement in fuel economy even in Highway driving 2 Better response and a more direct feeling 3 Lightweight and low cost This one-motor, two-clutch system without torque converter possesses a simple but highly capable architecture that is new to the passenger vehicle segment.

This paper describes the new VK56VD engine, which was developed in response to growing demand for cleaner automobiles, better fuel economy, and improved engine performance. A 5.6 L V8 engine, the VK56VD will go into the new Infiniti M56 premium sport luxury sedan. To boost power and efficiency and lessen its environmental impact, this engine will utilize key technologies such as Continuous Variable Valve Event and Lift (VVEL) and Direct Injection Gasoline (DIG). Details of the VK56VD are presented here along with highlights of the applied technologies and the development means.