AIR-FUEL RATIO CONTROL DEVICE OF MIXTURE FOR ENGINE

Title:

AIR-FUEL RATIO CONTROL DEVICE OF MIXTURE FOR ENGINE

Document Type and Number:

Japanese Patent JPS61106959

Kind Code:

A

Abstract:

PURPOSE: To equalize resolving power in the whole position when air-fuel ratio is feedback controlled, by forming an external shape of a solenoid controlled needle valve for controlling fuel in an LPG engine in the shape such that the air-fuel ratio changes in proportion to a reciprocating movement distance of the needle valve.

CONSTITUTION: Fuel in an LPG engine, being allowed to flow in a pipe 4 from a vaporizer 2, is supplied to a Venturi 8. A valve hole 9 in a part guided into the Venturi 8 equips a needle valve 6 driven by a step motor 5. The external shape of this needle valve 6 is formed in such a manner that a mixture supplied from a carburetor 7 is in proportion to a moving distance of the valve 6 over the full stroke the needle valve 6 is moved by the step motor 5. In this way, an exhaust gas level is reduced by equalizing resolving power in any range of the stroke when air-fuel ratio is feedback controlled.

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Inventors:

TATEMATSU MASATO
YAMAMOTO SHINYA
SARAI NAOTO
NAKANO MASATAKA

Application Number:

JP22954084A

Publication Date:

May 24, 1986

Filing Date:

October 30, 1984

Export Citation:

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Assignee:

AISAN IND

International Classes:

F02D19/02; F02M7/24; F02M21/02; (IPC1-7): F02M7/24

Domestic Patent References:

JPS59192856A

1984-11-01

Attorney, Agent or Firm:

Hideo Kodama (3 others)

Previous Patent: JPS61106958

Next Patent: EXHAUST GAS RECIRCULATING DEVICE