Dilution controlled lean burn system

Details Dilution controlled lean burn system Dilution controlled lean burn system

F - Mech Eng,Light,Heat,Weapons

02

D

F02D 41/14 (2006.01) F02D 21/08 (2006.01) F02D 41/00 (2006.01) F02M 23/06 (2006.01) F02M 25/07 (2006.01) F02B 1/04 (2006.01) F02D 41/30 (2006.01)

Patent

CA 2142199

2142199 9403717 PCTABS00030 A lean burn internal combustion engine system (10) including a motor driven exhaust dilution means (11, 16, 17) for diluting the intake air (18) with a variable level of exhaust gas dilution (19) introduced at the high pressure side of the throttle (14) such that the dilution equations governing the relationship between exhaust fuel ratio, EFR, and gas fuel ratio, GFR, are utilized to implement controlled air and exhaust dilution by control means (24), employing an air-fuel ratio, AFR, sensor (23), for maintaining: (a) lean operation at light engine loads with high GFR, (b) closed-loop feedback controlled engine operation at medium to high loads with high GFR, EFR, and essentially stoichiometric AFR, and (c) smooth transition with minimum fuel consumption and low NOx emissions between light load and high engine load through reliance upon the dilution equations and engine operating characteristics.

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