Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
FUEL QUANTITY INCREASING DEVICE FOR CARBURETOR
Document Type and Number:
Japanese Patent JP3196084
Kind Code:
B2
Abstract:

PURPOSE: To provide a carburetor fuel quantity increasing device inhibiting mixture from becoming lean in an engine, during high-opening low-speed operation and during accelerating operation and making the mixture rich positively in a specific operation region where the mixture becomes lean.
CONSTITUTION: A fuel quantity increasing device for a carburetor is formed of a carburetor 1 provided with a throttle valve 9 for mechanically controlling the opening/closing of the effective opening area of an intake passage 2, and a venturi part 11; a fuel inflow passage 17 for applying pressure to the fuel in a fuel tank T by a fuel pump P or the like so as to feed the fuel to a float chamber 5; a fuel quantity increase passage 20 with one end thereof connected to the fuel inflow passage 17 and with the other end thereof connected to the intake passage 2; and a control valve 21 for controlling the opening/closing of the fuel quantity increase passage 20 by a signal from a control circuit 30 receiving the output of a vehicle speed sensor 27 and a pressure sensor 28 for detecting negative pressure in the intake pipe. When the vehicle speed is within a range of the determined speed and the negative pressure in the intake pipe is within a determined range, the control valve 21 is put in action by the signal from the control circuit 30 to open the fuel quantity increase passage 20.


Inventors:
Takao Ishii
Hiroshi Yamazoe
Application Number:
JP9034992A
Publication Date:
August 06, 2001
Filing Date:
March 16, 1992
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
Keihin Co., Ltd.
International Classes:
F02D45/00; F02M7/12; F02M9/06; (IPC1-7): F02M7/12; F02D45/00; F02M9/06
Domestic Patent References:
JP3151551A
JP3151550A
JP5977064A
JP6045873U
JP5523345B2
Attorney, Agent or Firm:
Hiroshi Ikeda