Catalytic converter early light off using cylinder deactivation

Details Catalytic converter early light off using cylinder deactivation Catalytic converter early light off using cylinder deactivation

2005-08-02

2005-08-02

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...

C060S274000, C060S285000, C060S300000, C123S19800E

Reexamination Certificate

active

06922986

ABSTRACT:
A vehicle includes an engine that has a plurality of cylinders and that generates exhaust gas. A catalytic converter reduces harmful emissions from the exhaust gas after achieving a light off temperature. A controller is connected to the engine and the catalytic converter. The controller deactivates the cylinder(s) of the engine before the catalytic converter achieves the light off temperature if the engine is operating at idle or low load. The controller waits a first period before deactivating the cylinder(s). The controller optimizes engine operating parameters to reduce a second period that is required to achieve the light off temperature. A temperature sensor is connected to the controller and senses ambient temperature. The controller does not deactivate the cylinders if the ambient temperature is below a first predetermined temperature. The controller activates all of the cylinders if the engine is operating at high load.

REFERENCES:
patent: 4134261 (1979-01-01), Iizuka et al.
patent: 4230076 (1980-10-01), Mueller
patent: 4249488 (1981-02-01), Siegla
patent: 5007390 (1991-04-01), Tanaka et al.
patent: 6023929 (2000-02-01), Ma
patent: 6164065 (2000-12-01), Denari et al.
patent: 6182446 (2001-02-01), Gunther et al.
patent: 6205776 (2001-03-01), Otsuka
patent: 6276138 (2001-08-01), Welch
patent: 6389806 (2002-05-01), Glugla et al.
patent: 6415601 (2002-07-01), Glugla et al.
patent: 55-029002 (1980-03-01), None
patent: 55-049549 (1980-04-01), None
7. Aachener Kolloquium Fahrzeug- und Motorentechnik 1998; “Reduzierung Von Kraftstoffverbrauch und Abgase Durch Zylinderabschaltung” (Reduced Fuel Consuption & Emissions Through Cylinder Deactivation); Sandford/Allen/Tudor/Maas/Hass; p. 1-11.
Mercedes-Benz S-Class; “Four Made of Eight—The New 4.31 and 5.01 V8 Engines”, Fortnagel/Doll/Kollmann/Weining; p. 58-63.
Road & Track; V-8-6-4 Cadillac tries multi displacement, John Lamm; p. 14.
Road Test; Cadillac Sedan de Ville, “Holding on for dear life with the world's first variable-displacement engine”, Apr. 1981; p. 63-70.
WARD'S Engine and Vehicle Technology Update; “New Mercedes revives V-8 cylinder deactivation”, Oct. 1, 1998; p. 4.

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