Power plants – Internal combustion engine with treatment or handling of... – Methods
Patent
1993-12-27
1995-07-18
Hart, Douglas
Power plants
Internal combustion engine with treatment or handling of...
Methods
60276, 60285, F01N 320
Patent
active
054330718
ABSTRACT:
The invention relates to an improved emission control system. The system has particular applicability for use in an internal combustion engine (10) utilizing alternative fuels such as natural gas. More particularly, the invention provides an apparatus and method wherein hydrogen is removed by a conditioning catalyst (16) from the exhaust gas stream (21) to produce a conditioned exhaust gas (22). An exhaust gas oxygen (EGO) sensor (18) is in communication with the conditioned exhaust gas (22) and generates a signal in response to the sensed oxygen concentration of the conditioned exhaust gas (22). The A/F mixture entering engine (10) is adjusted by closed loop control means (14) in response to the signal generated by EGO sensor (18). The removal of hydrogen from the exhaust gas stream (21) eliminates lean shifts and allows oxygen sensor (18) and closed loop control means (14) to more accurately control the A/F ratio. As a result of improved control over the A/F mixture entering engine (10), main three-way catalyst (20) optimally converts noxious components present in the conditioned exhaust gas (22) to produce a purified exhaust stream (23).
REFERENCES:
patent: 4251990 (1981-02-01), Norimatsu et al.
patent: 4256074 (1981-03-01), Sugasawa et al.
patent: 4274373 (1981-06-01), Sugasawa et al.
patent: 5052177 (1991-10-01), Nada
patent: 5083427 (1992-01-01), Anderson
patent: 5157920 (1992-10-01), Nakaniwa
patent: 5158058 (1992-10-01), Yoshida et al.
patent: 5230322 (1993-07-01), Curran et al.
"Characteristics of a Zirconia Oxygen Sensor In Oxygen-Combustible Gas Mixtures", by Takashi Takeuchi et al., The Electrochemical Soc. Extended Abstracts, Abstract No. 74, Pittsburgh, Pa., Oct. 15-20, 1978, pp. 196-198.
"EMF Characteristics of Zirconia Oxygen Sensor in Nonequilibrium Gas Mixtures Containing Combustible Gas and Oxygen", by Keiichi Saji et al., Proceedings Of The 1st Sensor Symposium, 1981, pp. 103-107.
"A Comparison Between the Combustion of Isooctane, Methanol, and Methane in Pulse Flame Combustors With Closed Loop A/F Control", by Jeffrey S. Hepburn, SAE Technical Paper Series, Article #920799, International Congress & Exposition, Detroit, Mich., Feb. 24-28, 1992, pp. 151-157.
Hepburn Jeffrey S.
McCabe Robert W.
Willey Raymond L.
Ford Motor Company
Hart Douglas
Malleck Joseph W.
May Roger L.
LandOfFree
Apparatus and method for controlling noxious components in autom does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for controlling noxious components in autom, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for controlling noxious components in autom will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2415117