Intake system in multi-cylinder type internal combustion engine

Details Intake system in multi-cylinder type internal combustion engine Intake system in multi-cylinder type internal combustion engine

1992-02-27

1993-01-26

Nelli, Raymond A.

Internal-combustion engines

Engine speed regulator

Having plural throttle valve structure

123 52M, F02D 900, F02B 7518

Patent

active

051814919

ABSTRACT:
An intake system in a multi-cylinder type internal combustion engine comprises throttle valves disposed in a plurality of intake passages commonly connected to an air cleaner, and fuel injection valves disposed in the intake passages downstream of the throttle valves in an intake direction. In such intake system, a plurality of funnel-shaped portions are provided in a throttle body having opposite ends directly coupled to an intake manifold and an air cleaner, respectively, and each of the throttle valves is disposed in the throttle body, so that its upstream end in the intake direction is located at least on the corresponding funnel-shaped portion, when the throttle valve is fully opened. The throttle body includes ports provided therein, which are opened into the intake passages between a coupled surface of the throttle body to the intake manifold and the throttle valves, respectively, and which communicate with one another. This provides an increase in space efficiency and an increase in intake inertial effect.

REFERENCES:
patent: 4846996 (1989-09-01), Hoover
patent: 4924834 (1990-05-01), Bonfiglioli et al.
patent: 5036816 (1991-08-01), Mann

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