SI Engine Hardware and Software Design for High Power, Low Emission Applications 2009-01-0617
High technology, spark ignition direct injection (SIDI), engines are currently capable of achieving optimum horsepower and ULEV emissions levels. However, to meet the requirements of modern automotive powertrains, the task of increasing power density, improving fuel economy and reaching SULEV2 emissions is much more challenging. To achieve this, direct injection (DI) fuel systems offer the greatest precision and flexibility for engine fuel control. Features like high pressure start and improved catalyst heating, through multiple injections per combustion cycle, produce low engine-out emissions without the need for a secondary air injection system. This paper describes the analytical and experimental work done to achieve SULEV emissions levels for a twin-turbocharged derivative of General Motors (GM) high feature V6 engine.
Adrian Brdarski, Justin Kern, David Woldring, Hakan Yilmaz, Mark Christie, Klaus Müller-Haas
Robert Bosch LLC
SAE World Congress & Exhibition
SI and CI Engine Cold Start and Transient Emissions and Control, 2009-SP-2246, SAE International Journal of Fuels and Lubricants-V118-4, SAE International Journal of Fuels and Lubricants-V118-4EJ