The New Global Passenger Car Diesel Engine: will it be a Downsized 3-Cylinder Engine?

Improving the environmental performance of heavy-duty vehicles and engines: particular technologies

“…Downsizing is a very effective way of reducing BSFC in the entire engine speed-load domain, especially at low loads or high speeds (Mayer et al, 1982;Ecker et al, 2000;Ge et al, 2011;Saulnier and Guilain, 2004;Bargende and Berner, 2005;Banks et al, 2009;Fraser et al, 2009;Lumsden et al, 2009;Chadwell and Walls, 2010;Kirwan et al, 2010;Sisken et al, 2010;Thirouard and Pacaud, 2010;Gheorghiu, 2011;Pohorelsky et al, 2012). Downsizing (or even combined with down-speeding) at the same brake power means increased BMEP so that the engine speed-load modes re-defined by the US SET 13-mode or FTP cycle certification will all have elevated BMEP levels and hence lower BSFC and brake specific CO 2 emission.…”