# US 2017/0284286 A1 · Internal combustion engine and method to build it > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0284286 A1 - Document ID: US20170284286A1 - Status: Published application - Kind: A1 - Application number: 15/513,564 - Filed: 2015-09-22 - Published: 2017-10-05 - Earliest claimed: 2014-09-23 - Inventors: Giuseppe Maria MICELI - Web page: https://patentgrep.com/patent/US20170284286A1 ## CPC - F02B 41/04: in main cylinders - F02B 75/065: {with double connecting rods or crankshafts} - F02D 15/02: by alteration or displacement of piston stroke - F16H 21/18: Crank gearings; Eccentric gearings - F16H 21/20: with adjustment of throw - F16H 21/32: with additional members comprising only pivoted links or arms - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W) - F16H: GEARING ## Abstract Subject of the present invention, is an internal combustion engine comprising one or more cylinders, inside each of which a piston slides in variable strokes, which realizes the strokes of intake, compression, combustion and exhaust with a 360° rotation of two crank shafts. The present invention is in the field of engine destined to automotive applications as well as the engine destined to fixed installation such as generators. ## Claims ### Claim 1 Internal combustion engine comprising one or more cylinders (11), inside each of which a piston (12) and two crankshafts (2 and 21) slide, which are provided with cranks integral with two gear wheels that have equal diameter (30 and 23) being fixed on the engine crankcase and are free to rotate, characterised in that a) each piston (12) is connected to the first crank of the first crankshaft (21) integral with the first gear wheel (23) through a first connecting rod (10), a rod (7), and a second connecting rod (18), b) an end (5) of the rod (7) is connected to one end of an arm (24), the latter being free to rotate at the end (28) around a pin (27) fixed on the engine crankcase, c) the two gear wheels (30 and 23) meshing each other, d) the second crank of the second crankshaft (2) is connected to the arm (24) by means of a third connecting rod (29). ### Claim 2 (depends on 1) Internal combustion engine according to claim 1 characterised in that the two crankshafts (2 and 21) provided with counterweights (1 and 22) integral with the two gear wheels (30 and 23), the first connecting rod (10), the rod (7), the second connecting rod (18), the arm (24), and the third connecting rod (29) are connected to each other through pins (3, 25, 6, 8, 16, 13, and 20) which allow the rotation. ### Claim 3 (depends on 1, 2) Internal combustion engine according to claim 1 or 2 characterised in that the first connecting rod (10) is connected to one end of the rod (7), the second connecting rod is connected to an intermediate point of the rod (7), the arm (24) is connected to the other end of the rod (7). ### Claim 4 (depends on 3) Internal combustion engine according to claim 3 characterised in that the first connecting rod (10), the second connecting rod and the arm (24) are connected to the rod (7) by means of pins (6, 8, and 16) which allow the rotation. ### Claim 5 (depends on 1) Internal combustion engine according to claim 1 characterised in that the first connecting rod (10) and the second connecting rod are connected to the same end of the rod (7). ### Claim 6 (depends on 5) Internal combustion engine according to claim 5 characterised in that the first connecting rod (10) and the second connecting rod are connected to the same end of the rod (7) by means of a pin (8) that allows the rotation. ### Claim 7 (depends on 1) Internal combustion engine according to claim 1 characterised in that the third connecting rod (29) is mounted to the crank of the crankshaft (2) at one end, and to an intermediate point of the arm (24) at the other end. ### Claim 8 (depends on 7) Internal combustion engine according to claim 7 characterised in that the third connecting rod (29) at the two ends is connected to the crankshaft (2) and to the ami (24) by means of pins (3 and 25) which allow the rotation. ### Claim 9 (depends on 1) Method to build an internal combustion engine engine according to claim 1, characterised in that the coordinates of the end of the first connecting rod (10), connected to the rod (7), are a function of the following elements: the coordinates of the rotation points of the crankshafts (2 , 21), the coordinates of the pin (27) around which the arm (24) rotates, the radii of the cranks of the crankshaft, the lengths of the first (10) and the second connecting rod (18), the length of the rod (7), the initial angles of the cranks of the first and the second crankshafts (2,21) with the abscissa axis as reference, the angle between the line joining the centres of the pins (27 and 25) and the line joining the centres of the pins (27 and 6), the length of the line joining the centres of the pins (27 and 25), and the line joining the centres of the pins (27 and 6) belonging to the arm (24) and that, by suitably varying the sizes of the elements, the coordinates of the rotation points of crankshafts (2 21), the coordinates of the two arms that rotate around the pin (27), the radii of the cranks of the crankshafts, the lengths of the first (10) and the second connecting rod (18), the length of rod (7), the initial angles of the cranks of the first and the second crankshafts (2,21) with the abscissa axis as reference, the angle between. the two arms that rotate around the pin (27), will vary the position of the upper and lower dead points during the combustion cycle. ### Claim 10 (depends on 9) Method to build an internal combustion engine according to claim 9, characterised in that the elements: the coordinates of the rotation points of the crankshafts (2,21), the coordinates of the two arms that rotate around the pin (27), the radii of the cranks of the crankshafts, the lengths of the first (10) and the second connecting rod (18), the length of the rod (7), the initial angles of the cranks of the first and the second crankshafts (2,21) with the abscissa axis as reference, the angle between the line joining the centres of the pins (27 and 25) and the line joining the centres of the pins (27 and 6), the length of the line joining the centres of the pins (27 and 25) and the line joining the centres of the pins (27 and 6) belonging to the arm (24), can be modified in such a way that the line joining the top dead points is not perpendicular to the axis of the cylinder (11) within which the piston (12) slides, realising a volume of the combustion chamber that is different from that of the exhaust chamber. ### Claim 11 (depends on 2) Internal combustion engine according to claim 2 characterised in that the first connecting rod (10) is connected to one end of the rod (7), the second connecting rod is connected to an intermediate point of the rod (7), the arm (24) is connected to the other end of the rod (7).