Exhaust oxidation

Details Exhaust oxidation Exhaust oxidation

1996-02-22

2000-03-28

Denion, Thomas E.

Power plants

Internal combustion engine with treatment or handling of...

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

60289, 60305, 60274, F01N 300

Patent

active

060415932

ABSTRACT:
The invention relates to a device and a method for reducing emissions in catalytic converter exhaust systems for a vehicle provided with a combustion engine. The invention comprises a control unit adapted to control the air-fuel being fed to the engine so that a high concentration of hydrogen is generated in the exhaust gas during start-up of the engine. Furthermore, secondary air is supplied downstream of the engine during cold starting thereof for forming a gas mixture with the exhaust gas. This gas mixture is oxidized, so that heat energy generated by means of this oxidation is supplied to the catalyst, thereby providing a reduction of the light-off time of the catalyst.

REFERENCES:
patent: 3986352 (1976-10-01), Casey
patent: 4099377 (1978-07-01), Yoshimura
patent: 4106287 (1978-08-01), Auclair et al.
patent: 4209981 (1980-07-01), Miyamori
patent: 5577383 (1996-11-01), Kuroda et al.
Die Motoren im neuen Opel Omega, Heinz-Ewo Brand et al., Motortechnische Zeitschrift, vol. 55 (1994), No. 4, pp. 198-206.
SAE Report No. 730201, Warmup Limitations on Thermal Reactor Oxidation, Donald D. Patterson et al.
SAE Report No. 710608, A Well-Mixed Thermal Reactor System for Automotive Emission Control, Robert J. Lang.
SAE Report No. 730202, Limiting Factors on Steady-State Thermal Reactor Performance, Robert H. Kadlec et al.
SAE Report No. 920400, Exhaust gas ignition (EGI)--A New Concept for Rapid Light-Off of Automotive Exhaust Catalyst, T. Ma et al.

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