Fuel injection carburetor in internal combustion engine

Details Fuel injection carburetor in internal combustion engine Fuel injection carburetor in internal combustion engine

1984-09-12

1986-02-25

Moy, Magdalen Y. C.

Internal-combustion engines

Engine speed regulator

Idle speed control

123470, F02M 300

Patent

active

045721289

ABSTRACT:
A fuel injection carburetor in an internal combustion engine, comprising: a fuel injection valve provided at a position upstream of a throttle valve mounted in an intake passage; and an idling bypass air passage bypassing the throttle valve; wherein the range of fuel spray angle of the fuel injection valve is determined such that the fuel injection valve is disposed in such a manner that a position on the surface of the throttle valve, to which the sprayed fuel reaches, is always located at an opening forward end in the downstream direction of the throttle valve rather than an opening forward end in the upstream direction within the total throttle opening of the throttle valve from the full closing to the full opening, there are provided a bypass air valve of a wax-type provided in the idling bypass air passage and in which the higher the temperature rises, the less the flowing area of the bypass air passage is made, and a hot water passage for circulating the engine coolant from a position adjacent the opening forward end in the downstream direction of the throttle valve and through a wax portion of the bypass air valve of the wax-type, and an outlet of a bypass air passage for the idle adjustment to correct an air flow rate in the idling bypass air passage is provided on an inner wall of the intake passage on the side of the opening forward end in the upstream direction of the throttle valve.

REFERENCES:
patent: 4212277 (1980-07-01), Melotti
patent: 4235375 (1980-11-01), Melotti
patent: 4337742 (1982-07-01), Carlson et al.
patent: 4373491 (1983-02-01), Knapp
patent: 4416241 (1983-11-01), Knapp et al.

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