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Patent Searching and Data


Title:
ALTITUDE COMPENSATOR OF CARBURETOR
Document Type and Number:
Japanese Patent JPS5879647
Kind Code:
A
Abstract:

PURPOSE: To smoothly perform cold operation further purify exhaust gas, by connecting auxiliary passages branching from before and after throttles in passages and both interposing the other throttles and attachine auxiliary passage- opening and closing-temperature sensors in said auxiliary passages.

CONSTITUTION: Auxiliary passages 25W28 are connected branching from before and after fixed throttles 12, 13, provided in passages 14, 15, and cold operational throttles 33, 34 are interposed, further auxiliary passage-opening and closing- temperature sensors 29, 30, operating valves 31, 32, are provided in said auxiliary passages 25W28. Cold operation of an automobile engine is performed at highland, then the sensors 29, 30 sense a cold condition of the engine to cause the valves 31, 32 to open the auxiliary passages 25W28. In consequence, a bellows 23 closes an intake port 24 because of low pressure at cold operation, and an inlet of a passage 16 is opened by a diaphragm valve 6 through negative pressure in an intake pipe simultaneously with cranking operation. Then air from a filter 22 is conducted from the passage 16 also to the passage 14, 15 and 25, 27, to flow in the throttles 12, 13 and 33, 34. Accordingly, as compared with after warming, a more air bleed by the amount of the throttles 33, 34 is supplied to a setting quantity, and air fuel ratio can be prevented from becoming a rich state.


Inventors:
KANBARA TATSUYOSHI
OONAKA HIDEMI
Application Number:
JP17725381A
Publication Date:
May 13, 1983
Filing Date:
November 06, 1981
Export Citation:
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Assignee:
TOYOTA MOTOR CO LTD
International Classes:
F02M1/14; F02M7/28; (IPC1-7): F02M1/00; F02M7/00
Attorney, Agent or Firm:
Tomita Koharu