Internal-combustion engines – Charge forming device – Auxiliary control of carburetor fuel metering
Patent
1980-05-13
1982-06-29
Nelli, Raymond A.
Internal-combustion engines
Charge forming device
Auxiliary control of carburetor fuel metering
123437, 123440, 261DIG39, F02M 714
Patent
active
043367801
ABSTRACT:
A jet control type carburetor according to the present invention includes an intake pipe having an intake passage formed in an inner wall thereof, the intake passage allowing an intake air to flow therethrough; a venturi provided in the intake pipe, for controlling flow velocity and pressure of the intake air in the intake passage; a fuel nozzle opened into the intake passage and connected to a fuel supply source through a fuel passage for sucking the fuel within the intake passage from the fuel nozzle in order to introduce the mixture of air and fuel within the intake passage; a throttle valve provided downstream of the venturi, for controlling the flow rate of the mixture of intake air and fuel; a control air nozzle opened into the intake passage and connected to an air supply source through a control air passage for jetting the flow of the control air to the fuel spurted from the fuel nozzle to afford the kinetic energy of the control air to the fuel; and a throttle means provided upstream of the control air nozzle in the control air passage, for controlling the flow rate of the control air. The control air nozzle has a predetermined inner diameter (d.sub.a) and is provided at a portion apart from the fuel nozzle with a predetermined spacing (W), and a dimensional relationship of the spacing W between the fuel nozzle and the control air nozzle to the inner diameter (d.sub.a) of the control air nozzle is set as follows:
REFERENCES:
patent: 2541316 (1951-02-01), Winkler
patent: 4173956 (1979-11-01), Ikeura et al.
patent: 4187805 (1980-02-01), Abbey
Fujikake Kenji
Idota Yoshinori
Ohsawa Katsuyuki
Sugiyama Katsuhiko
Kabushiki Kasiha Toyota Chuo Kenkyusho
Nelli Raymond A.
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