Oxidant storage capacity estimation

Details Oxidant storage capacity estimation Oxidant storage capacity estimation

2005-04-05

2005-04-05

Tran, Binh Q. (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

Having sensor or indicator of malfunction, unsafeness, or...

C060S274000, C060S276000, C060S285000, C123S184550

Reexamination Certificate

active

06874312

ABSTRACT:
A method for determining the efficiency of a three-way catalyst is presented. It is shown that more accurate results are achieved if the efficiency estimates are performed when the engine is at idle or during low load operating conditions. The efficiency is inferred from the amount of fuel required to purge the device after it has been fully saturated with oxidants due to lean operation. Due to improved accuracy and reduced reductant waste, this method allows for improved emission control and fuel efficiency.

REFERENCES:
patent: 5351484 (1994-10-01), Wade
patent: 6220018 (2001-04-01), Yamanashi et al.
patent: 6374596 (2002-04-01), Taga et al.
patent: 6383267 (2002-05-01), Takaku et al.
patent: 6481201 (2002-11-01), Kako et al.
patent: 6571551 (2003-06-01), Lundgren et al.
patent: 6622479 (2003-09-01), Kakuyama et al.

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