Adaptive manifold tuning
AssigneeSiemens Electric Limited
InventorsStephen E. Brackett, Dennis E. Houle
Life of this patent
Estimating the term…
Abstract
The effective area of a Helmholtz resonator used to tune the manifold is varied in accordance with engine speed to improve the engine-torque speed curve. The organization and arrangement of air intake passage, plenum chamber, runners, and Helmholtz resonator is also advantageous.
Claims9
An internal combustion engine induction system comprising an induction air intake passage containing throttle valve means for selectively throttling induction air flow, plenum chamber means for receiving the induction air flow that has passed through said induction air intake passage, runners leading from said plenum chamber means for delivering induction air to individual combustion chambers of an engine, and a Helmholtz resonator chamber that is placed in communication with said induction air intake passage by means of a neck of the Helmholtz resonator, characterized by means for selectively setting the effective transverse cross sectional area of communication that said neck provides between said resonator chamber and said induction air intake passage, said means for selectively setting the effective transverse cross sectional area of communication that said neck provides between said resonator chamber and said induction air intake passage comprising obturator means that is operated by an actuator means in accordance with an engine operating parameter, said obturator means comprising a slide that is selectively positionable in the plane of said transverse cross sectional area by said actuator means, and characterized further in that said slide is guided, at least in part, on the exterior of a wall portion of at least one of said induction air intake passage and said plenum chamber.
An internal combustion engine induction system comprising an induction air intake passage containing throttle valve means for selectively throttling induction air flow, plenum chamber means for receiving the induction air flow that has passed through said induction air intake passage, runners leading from said plenum chamber means for delivering induction air to individual combustion chambers of an engine, and a Helmholtz resonator comprising a resonator chamber that is placed in communication with said induction air intake passage by means of a neck of the Helmholtz resonator, characterized by means for selectively setting the effective transverse cross sectional area of communication that said neck provides between said resonator chamber and said induction air intake passage, and characterized further in that said neck places said resonator chamber in communication with said induction air intake passage at a location along said induction air intake passage that is downstream of said throttle valve means.
An internal combustion engine induction system comprising an induction air intake passage containing throttle valve means for selectively throttling induction air flow, plenum chamber means for receiving the induction air flow that has passed through said induction air intake passage, runners leading from said plenum chamber means for delivering induction air to individual combustion chambers of an engine, and a Helmholtz resonator comprising a resonator chamber that is placed in communication with said induction air intake passage by means of a neck of the Helmholtz resonator, characterized by means for selectively setting the effective transverse cross sectional area of communication that said neck provides between said resonator chamber and said induction air intake passage, and characterized further in that said plenum chamber means and said resonator chamber are juxtaposed generally side-by-side with said runners extending from a side of said plenum chamber means to wrap partially around a side of said resonator chamber.
An internal combustion engine induction system comprising an induction air intake passage containing throttle valve means for selectively throttling induction air flow, plenum chamber means for receiving the induction air flow that has passed through said induction air intake passage, runners leading from said plenum chamber means for delivering induction air to individual combustion chambers of an engine, and a Helmholtz resonator comprising a resonator chamber that is placed in communication with said induction air intake passage by means of a neck of the Helmholtz resonator, characterized in that a portion of said plenum chamber means and a portion of said resonator chamber are juxtaposed generally side-by-side with said runners extending from said portion of said plenum chamber means to wrap partially around said portion of said resonator chamber.
Dependencies are inferred from the claim text.