US 4,109,619 A · Flow control insert for internal combustion engine intake manifolds

Abstract

An insert for the receiver of an intake manifold for an internal combustion engine. The receiver receives air/fuel mixture from a carburetion system, usually from a plurality of carburetor barrels, and runners exit from the receiver to conduct the mixture to respective cylinders. The insert, which can be of a selectible or adjustable contour, serves to direct the flow of mixture to the various runners in accordance with the demands of the respective cylinders. Correct selection of insert contour and size enables an individual manifold configuration to be adapted to the unique airflow pattern and volumetric requirements of an individual engine, rather than to an average engine, and also to specific performance ranges, rather than to a wider average performance range. The insert can also be movably mounted to provide for various load conditions. The invention comprehends the combination of the insert and a manifold. The invention also comprehends an insert which does not divide the charge among runners, but instead specifically affects the supply to an individual runner.

Claims31

Dependent claims

An insert for the receiver of a manifold which receives fuel/air mixture and in turn supplies the mixture through a plurality of runners to respective internal engine combustion chambers, the receiver having an inlet opening, a bottom wall and a sidewall, the runners having exit openings in the sidewall spaced apart from one another around the receiver and below the inlet opening, said insert comprising:

a body having a boundary surface in the path of mixture flowing into the receiver from the inlet opening and having an axis facing toward and substantially aligned with said incoming mixture, the portion of the boundary surface which is to be placed nearest to said inlet opening having a surface perimeter extends in planes normal to said axis, which surface is non-circular and and at least in part relieved to form concave curved lines with said normal planes in order to form with the sidewall a plurality of paths for flow of said mixture, the portion of the boundary surface which is to be remote from the inlet opening having a surface configuration to encourage flow of mixture through the exit ports.

Dependencies are inferred from the claim text.

Flow control insert for internal combustion engine intake manifolds

Life of this patent

Flow control insert for internal combustion engine intake manifolds

Life of this patent

Abstract

Claims31