New ACE Diesel Engine with Biodiesel Cuts NOx Emissions 80%
26 December 2006
The Nikkei Business Daily reports that New ACE Institute Co. and the National Traffic Safety and Environment Laboratory have developed diesel engine technology that reduces emissions of oxides of nitrogen from engines fueled by rapeseed-based biodiesel blends by 80%.
The engine uses a combination of Exhaust Gas Recirculation (EGR) and a high-boost strategy that runs combustion at triple the pressure of naturally aspirated diesel engines. New ACE, founded in 1992, is a consortium funded by Hino Motors, Ltd.; Isuzu Motors Ltd.; Mitsubishi Fuso Truck & Bus Corp.; and Nissan Diesel Motor Co., Ltd. to pursue new diesel combustion strategies aimed at reducing the exhaust emissions and increasing thermal efficiency for future heavy duty diesel engines.
New ACE has been investigating engine technologies using a combination of EGR, high-boost, high-pressure injection and flexible intake and exhaust valve strategies.
In August 2006, New ACE recognized Sturman Industries—the digital valve company—for its cooperation in research. Sturman Industries has supplied New ACE with Hydraulic Valve Actuation and intensified fuel injection systems. These proprietary technologies rely on the miniature, ultra fast, and energy efficient Sturman Digital Valves. The Digital Valves, when integrated with advanced hydraulics control systems and intelligent electronics, are an enabling technology to control the combustion process.
Earlier this year, New ACE researchers published a paper describing their use of a high-boost (5x naturally aspirated pressure) and high-pressure (200 MPa or 2,000 bar) fuel injection in a single-cylinder engine to deliver improvements in combustion and brake thermal efficiency with low PM and NOx.
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