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Patent Searching and Data


Title:
SECONDARY AIR SUPPLYING DEVICE FOR ENGINE
Document Type and Number:
Japanese Patent JP3202288
Kind Code:
B2
Abstract:

PURPOSE: To enhance an exhaust emission purifying effect by making appropriate a quantity of secondary air with respect to an exhaust emission purifying catalyst.
CONSTITUTION: When an oxygen adsorbing quantity by itself of an exhaust emission control catalyst 23 disposed on an exhaust passage 22 is large, a quantity of secondary air supplied from an air passage 31 is reduced in comparison with in the case where the quantity is small. The oxygen adsorbing quantity of the catalyst 23 is detected by using, for example, an engine speed reducing time or an idle time as a parameter.


Inventors:
Terada, Koichi
Yamamoto, Yoshimi
Tokuda, Yoshiharu
Application Number:
JP1991000352746
Publication Date:
August 27, 2001
Filing Date:
December 16, 1991
Export Citation:
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Assignee:
MAZDA MOTOR CORP
International Classes:
F01N3/22; F01N3/34; F02D43/00; (IPC1-7): F01N3/34; F01N3/22; F02D43/00
Attorney, Agent or Firm:
村田 実 (外1名)