F - Mech Eng,Light,Heat,Weapons – 01 – N
Patent
F - Mech Eng,Light,Heat,Weapons
01
N
F01N 3/02 (2006.01) F01N 3/023 (2006.01) F01N 9/00 (2006.01) F02D 41/02 (2006.01) F02D 41/14 (2006.01) F02D 41/38 (2006.01) F02B 3/06 (2006.01) F02D 9/04 (2006.01)
Patent
CA 2073767
2073767 9112417 PCTABS00006 A control system for regenerating a particulate trap in the exhaust system of a diesel engine includes control logic which controls the air/fuel ratio of the engine by operating a backpressure valve in the engine exhaust system to provide a proper amount of excess oxygen to permit efficient combustion of the particulate content of the trap, but to avoid rapid and damaging combustion rates. Actual engine air/fuel ratio is compared to a commanded air/fuel ratio, and the position of the backpressure valve is adjusted accordingly. The commanded air/fuel ratio is ratcheted upwardly or downwardly once in a predetermined time period in response to a temperature error signal between exhaust gas temperature sensed in the engine exhaust manifold and a predetermined commanded temperature. An override is provided to permit the vehicle operator to override regeneration when power is required from the engine, and a low power cut-off is provided to suspend regeneration when the engine is operated for a period of time at low power conditions where regeneration is inefficient.
Gabelman Brian C.
Hardy James A.
Stiglic Paul M.
Alliedsignal Inc.
Gabelman Brian C.
Gowling Lafleur Henderson Llp
Hardy James A.
Stiglic Paul M.
LandOfFree
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