Method and arrangement for controlling the operation of a second

Power plants – Internal combustion engine with treatment or handling of... – Methods

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60284, F01N 322

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active

053199286

ABSTRACT:
The emission of toxic materials when starting an internal combustion engine equipped with a catalytic converter and a secondary air pump can be further reduced with the method and arrangement of the invention. This reduction takes place by a switch-on of the secondary air pump under selectable conditions which include a warm start of the engine. The danger of overheating the catalytic converter by the operation of the secondary air pump for a warm engine is taken into account by a variable switch-on duration of the secondary air pump which can be realized by a counting procedure having an increment dependent on operating parameters.

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"Die Abgasreinigung der neuen Mercedes-Benz 300 SL-24 und 500 SL-Aufbau und Wirkungsweise", by W. Zahn et al. MTZ Motortechnische Zeitschrift 50 Dec. (1989) 6, p. 249.

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