Patent ID: 9169772
Filing Date: 2015-10-27
Classification: F01C,F02B,Y02T

Abstract:
1. An internal combustion engine having four power strokes of a four stroke Otto cycle, the internal combustion engine comprising: a piston assembly of four single-headed pistons for driving a crankshaft, each single-headed piston mounted in a respective cylindrical housing having an end plate, each end plate and each corresponding single-headed piston having a central shaft mounted for reciprocating motion with the other three single-headed pistons to drive the crankshaft, the crankshaft being coupled to an output shaft for rotational movement through one hundred eighty degrees with each power stroke of the four piston assembly, the four pistons being numbered one, two, four and three in order along the crankshaft, the first and third single-headed pistons one and three being located opposite to the second and fourth single-headed pistons two and four, the first and third single-headed pistons one and three being mounted on an opposite side of the crankshaft and the second and fourth single-headed pistons two and four being mounted adjacent to one another and on an opposite side of the crankshaft from the first and third single-headed pistons one and three, the cylindrical housings defining respective, alternatively expandable and compressible chambers between the end plates of the cylindrical housings and the respective first through fourth pistons of the piston assembly such that when first and third chambers of the housings of the first and third pistons are expanded, the second and fourth chambers of the housings of the second and fourth pistons are compressed; and the first, second, third and fourth chambers respectively being sequentially ignited in four power strokes of a repeating Otto cycle.