Patent ID: 8893683
Filing Date: 2014-11-25
Classification: F01B,F02B,F02M,F16J,Y02T

Abstract:
1. An internal-combustion engine system, comprising: a cylinder wall having a plurality of intake ports defined therein at a first distance along the cylinder wall and a plurality of exhaust ports defined therein at a second distance along the cylinder wall; a crankshaft; an intake piston disposed within the cylinder wall and coupled to the crankshaft via a connecting rod with the piston adapted to reciprocate in the cylinder in response to rotation of the crankshaft thereby covering and uncovering the intake ports; an intake system coupled to the intake ports with the intake system including: a first generally volute-shaped plenum fluidly coupled to a first portion of the intake ports and a locus of geometric centers of cross sections of the first plenum spirals inwardly with a monotonically decreasing radius as considered in the direction of flow; and a second generally volute-shaped plenum fluidly coupled to a second portion of the intake ports and a locus of geometric centers of cross sections of the second plenum spiral inwardly with a generally decreasing radius as considered in the direction of flow, wherein: the first and second plena wrap around an outside of the cylinder wall with a direction of flow induced in the first and second plena having the same rotational direction.