Exhaust gas cleaning system having particulate filter

Details Exhaust gas cleaning system having particulate filter Exhaust gas cleaning system having particulate filter

2006-12-12

2006-12-12

Denion, Thomas (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S297000, C060S311000

Reexamination Certificate

active

07146804

ABSTRACT:
An exhaust gas cleaning system for a diesel engine has a diesel particulate filter (DPF) disposed in an exhaust pipe. An electronic control unit of the system controls regeneration of the DPF. The DPF is heated and regenerated only when an operating state of the engine is in an area where temperature-increasing efficiency is high, in the case where a quantity of particulate matters collected by the DPF is equal to or greater than a first threshold and is less than a second threshold. The second threshold is greater than the first threshold. If the quantity of the collected particulate matters becomes equal to or greater than the second threshold, the regeneration is performed even if the operating state is not in the area of the high temperature-increasing efficiency.

REFERENCES:
patent: 4603550 (1986-08-01), Shinzawa
patent: 4630438 (1986-12-01), Shinzawa
patent: 4665690 (1987-05-01), Nomoto et al.
patent: 4756155 (1988-07-01), Shinzawa
patent: 5319930 (1994-06-01), Shinzawa et al.
patent: 6237326 (2001-05-01), Russell
patent: 6644023 (2003-11-01), Hirota et al.

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