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Patent Searching and Data


Title:
METHOD AND DEVICE FOR CONTROLLING CARBURETOR
Document Type and Number:
Japanese Patent JP3720379
Kind Code:
B2
Abstract:

PURPOSE: To automatically adjust air/fuel(A/F) ratio to a preferred level during varying operation conditions by adjusting mixing ratio in a first control circuit with dependency on rotation speed of an existing A/F ratio, periodically changing the mixing ratio within a short time in a second control circuit and changing the mixing ratio according to rotation change and memory information.
CONSTITUTION: A first control circuit 3 modifies air/fuel ratio in connection with the rotation number of an engine to uniform the A/F ratio at varying engine rotation speeds. A second control circuit 6 has a feed back connection to the engine rotation, deals with the rotation number and its first differentiation its first and gives a single short-term actions to adjusting means 5 or 9. While measure conditions, for example the rotation number, are confirmed to be in the permissible range, the adjusting means 9 is closed. As a result, while the rotation number or the first differentiation is lower, the correction of the basic graph lowers the A/F ratio, the adjusting means 9 is closed again, changing of the rotation number is analyzed, a new adjustment is carried out, and the adjustments are carried out repeatedly until the level that does not need the adjustment. After the A/F ratio is maintained for a predetermined period of time, adjustment of the A/ F ratio starts.


Inventors:
Svensson, Ulf
Stroem, Hans
Application Number:
JP1993000030677
Publication Date:
November 24, 2005
Filing Date:
February 19, 1993
Export Citation:
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Assignee:
ELECTROLUX:AB
International Classes:
F02D41/02; F02D35/00; F02M7/12; F02M17/04; (IPC1-7): F02M7/12; F02D41/02; F02M17/04
Domestic Patent References:
JP61195364A
JP58180756A
JP58170843A
JP1163448A
JP61051657B1
Attorney, Agent or Firm:
石田 敬
西山 雅也