Broad torque band producing intake manifold for an internal comb

Details Broad torque band producing intake manifold for an internal comb Broad torque band producing intake manifold for an internal comb

1982-03-01

1984-07-24

Feinberg, Craig R.

Internal-combustion engines

Multiple cylinder

123 52MV, 123 59R, F02B 7520

Patent

active

044612486

ABSTRACT:
An intake manifold for internal combustion engines has a plurality of independent runners emanating from a central plenum. Different sets of runners have different cross-sectional areas matched to flow velocity through the manifold at maximum torque and desired engine speeds to produce a wide high torque band. The length of each runner of each set corresponds to a harmonic frequency of the fundamental frequency of air at standard temperature, but the frequency differs for each runner set. Within each set, runner cross-sectional areas are constant throughout their length. In one embodiment, the runners curve from a plenum to their exits and in the curve each runner's cross section is regular trapezoidal with the small side of the trapezoid on the inside curve and the shape of the trapezoid effecting constant static pressure throughout the cross section.

REFERENCES:
patent: 3931811 (1976-01-01), McFarland
patent: 4013049 (1977-03-01), Dilgard et al.
patent: 4119067 (1978-10-01), Aldrich et al.
patent: 4186695 (1980-02-01), Gartner et al.
patent: 4300488 (1981-11-01), Cser

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