An exhaust manifold for an engine has sets of branches tuned to the fundamental frequency of exhaust products but with the branch length of the sets different so that the engine speed at which resonance occurs in each set is different. An inlet manifold has runner sets with each set being paired with an exhaust manifold branch set serving the same cylinders and tuned to effect resonance of combustion air in the runners at the same engine speed that resonance occurs in its associated exhaust branches.
Manifold For Internal Combustion Engines Having Independent Runners, A Two-Plane Layout, And Independent Plenums
Independent runners of a multiple runner manifold feed from two independent plenums. Alternate runners, in the sense of engine firing order, feed from alternate of the plenums. The physical separation of the plenums attenuates intercylinder interference. Long runners of small cross section provide large mixture quantity and high mixture velocity for good torque. Runner cross-sectional area also is determined by that mixture velocity at which maximum torque occurs. The runners are tuned to the first harmonic to correspond to optimum torque. The runners of one plenum pass over the runners of the other so that runner geometry is simple.
Broad Torque Band Producing Intake Manifold For An Internal Combustion Engine
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.
Dr. McFarland graduated from the Emory University School of Medicine in 1964. He works in Boston, MA and specializes in Cardiovascular Disease. Dr. McFarland is affiliated with Massachusetts General Hospital.
CALIFORNIA INSTITUTE OF TECHNOLOGY Pasadena, CA Mar 2008 to Sep 2008 Research Support AssistantSKID ROW HOUSING TRUST Los Angeles, CA Feb 2008 to Mar 2008 Hotel Desk ClerkGOODWILL INDUSTRIES Hollywood, CA 2006 to 2008 Retail Clerk
Education:
CALIFORNIA POLYTECHNIC STATE UNIVERSITY San Luis Obispo, CA Jan 2009 to Jan 2011 Bachelor of Science in Business Administration. Concentration in Accounting
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Microsoft Office Excel, PowerPoint, Microsoft Word, Taxwise (Tax preparation software)
I'm 62, Cancer, Serious Christian and have many interests, ie...fixing things around the house, landscaping, NASCAR, fishing, camping, walking, jogging, reading (Spiritual Lituature), having fun t...