ONE-STROKE INTERNAL COMBUSTION ENGINE

• US 20140290616A1
• Filed: 03/26/2014
• Published: 10/02/2014
• Est. Priority Date: 03/27/2013
• Status: Active Grant

• Current Assignee: Differential Dynamics Corporation
• Original Assignee: Differential Dynamics Corporation
• Inventors: Han, Kyung Soo
• Granted Patent: US 9,169,772 B2
• Time in Patent Office: Days
• US Class Current: 123/18.A
• CPC Class Codes: F01C 1/063 with coaxially-mounted members having continuously-changing circumferential spacing between them
• CPC Class Codes: F01C 9/00 Oscillating-piston machines or engines
• CPC Class Codes: F02B 2075/023 one
• CPC Class Codes: F02B 53/04 Charge admission or combustion-gas discharge
• CPC Class Codes: F02B 75/265 Engines with cylinder axes substantially tangentially to a circle centred on main-shaft axis
• CPC Class Codes: F02B 75/282 the pistons having equal strokes
• CPC Class Codes: F02B 75/32 Engines characterised by connections between pistons and main shafts and not specific to preceding main groups
• CPC Class Codes: Y02T 10/12 Improving ICE efficiencies

Abstract

One-stroke internal combustion engines may comprise reciprocating pistons which are either straight or rotary. Three principles are required to make one-stroke engines work: create four dedicated chambers, assign the chambers with coordinated functions, and make pistons move in unison. The functions will be assigned only to a single stroke but an Otto cycle produces a repeating four stroke cycle. Since four functions are performed simultaneously during one stroke, every stroke becomes a power stroke. In reality, 1-stroke engines are physically rearranged 4-stroke engines. Both straight and rotary 1-stroke engines can be modified to comprise opposed piston opposed cylinder (OPOC) engines. The reciprocating piston output of 1-stroke pistons may be converted to continuously rotating output by using crankshafts with split bushings or newly developed Crankgears with conventional bearings. A 1-stroke engine may require only one crankshaft and thus may reduce the number of parts and increase the specific power ratio.

Claims

1. A reciprocating rotary or straight piston engine for providing an approximately 180°

or unidirectional power stroke, the rotary or straight piston respectively comprising

A first piston on a central shaft or tied by external rods to a second piston for reciprocating movement within a cylinder housing, the housing having first, second, third and fourth chambers, each chamber adapted to be in a compressed state when the piston substantially covers the chamber and an expanded state when the piston does not cover the cavity, first and second expanded chambers being dedicated to one of exhaust and compression functions and third and fourth compressed chambers being dedicated to one of intake and ignition in the power stroke, the first piston and second piston moving together, the first and second pistons having a reciprocating motion and the four chambers being dedicated to intake, exhaust, ignition and compression in each of four strokes of a four stroke cycle.

2. A reciprocating rotary or straight piston engine comprising the reciprocating pistons of claim 1, the engine with different, dedicated intake, compression, ignition/combustion and exhaust chambers during each of four strokes of a repeating engine cycle.

3. The reciprocating rotary or straight engine of claim 2 wherein the engine is in a straight configuration, the first and second pistons being double-headed pistons joined together by a central common shaft, the central common shaft extending outside the cylindrical housing.

4. The reciprocating rotary or straight piston engine of claim 2 having a sequenced cycle comprising the following four strokes in a cycle, not having the same first stroke:

wherein stroke 1 may comprise exhaust chamber B, compression chamber D, chambers B and D being expanded, intake chamber A and ignite chamber C, chambers A and C being compressed;

wherein stroke 2 may comprise compress chamber A, exhaust chamber C, chambers A and C being expanded, intake chamber B and ignite chamber D, chambers B and D being compressed;

wherein stroke 3 may comprise compress chamber B, exhaust chamber D, chambers B and D being expanded and ignite chamber A and intake chamber C, chambers A and C being compressed; and

wherein stroke 4 may comprise exhaust chamber A, compress chamber C, chambers A and C being expanded and ignite chamber B and intake chamber D, chambers B and D being compressed to complete one Otto cycle of either a rotary or straight 1-stroke engine.

5. The reciprocating rotary or straight internal combustion engine of claim 4 wherein the sequenced cycle is controlled by a rotary switch.

6. The reciprocating rotary or straight internal combustion engine of claim 4 wherein the sequenced cycle is controlled by an electronic circuit.

7. The reciprocating rotary or straight internal combustion engine of claim 4 being controllable via solenoids.

8. The reciprocating rotary or straight internal combustion engine of claim 2 having fuel injection for each dedicated intake chamber prior to ignition.

9. The reciprocating rotary or straight internal combustion engine of claim 2 having at least one Sprag for providing unidirectional motion of an output shaft.

10. The reciprocating rotary or straight internal combustion engine of claim 2 further comprising a driver and gears for providing unidirectional motion of an output shaft from a reciprocating input motion.

11. The reciprocating rotary or straight internal combustion engine of claim 1 comprising a crankshaft for unidirectional push-pull unidirectional motion of an output shaft.

12. An internal combustion engine having first and second double-headed pistons aligned on a shaft for straight-line reciprocating motion having ignition points at each end of first and second volumes of piston housings for the first and second double-headed pistons such that a first chamber and a third chamber of the first and second volumes are expanded while a second and fourth chamber of the first and second volumes are compressed and sequential ignition of the first through fourth chambers in a repeating cycle is provided, the first through fourth chambers formed in the piston housings of the two double-headed pistons causing the double-headed pistons to achieve a straight-line reciprocating motion.

13. An internal combustion engine having first and second double-headed pistons aligned parallel to one another and each having an associated shaft, each for straight line reciprocating motion having ignition points at each end of first and second volumes for the first and second double-headed pistons such that a first chamber and a third chamber of the first and second volumes are expanded while a second and fourth chamber of the first and second volumes are compressed and sequential ignition of the first through fourth chambers in a repeating cycle causes the pistons to achieve a parallel, reciprocating motion of their respective shafts.

14. An internal combustion engine having first and third single-headed pistons opposite to and interleaved with second and fourth single-headed pistons having alternatively expandable and compressible chambers such that when first and third chambers of the first and third pistons are expanded, the second and fourth chambers of the second and fourth pistons are compressed, the first, second, third and fourth pistons coupled to a crankshaft and the first, second, third and fourth chambers associated with the first, second, third and fourth chambers respectively being sequentially ignited in a repeating cycle.

15. A rotary one-stroke internal combustion engine having a one hundred eighty degree power stroke per piston wherein a piston of the engine comprises an opposed pair of pistons moving in opposite clockwise and counterclockwise directions, the internal combustion engine having dedicated chambers proximate the reciprocating opposed pistons.

16. An internal combustion engine having a one hundred eighty degree power stroke per piston, the engine comprising first and second opposed pistons for motion in opposite directions from one another and having four dedicated chambers to functions of ignite, intake, compress and exhaust.

17. The internal combustion engine as recited in claim 16 comprising a cylindrical housing and a shaft coupled to an output section, the output section being transgear controlled to provide a coordinated expansion/compression motion of an output shaft.

18. The internal combustion engine as recited in claim 16 comprising a square housing and two pairs of opposed pistons and associated centrally located gears, the internal combustion engine having four dedicated chambers to functions of ignite, intake, compress and exhaust.

19. The internal combustion engine as recited in claim 16 having four stroke straight opposed pistons coupled to a central output shaft, two pairs of opposed pistons each having associated drive and idle gears for engaging the output shaft.

20. An internal combustion engine having a left cylinder, a central plate of an external housing and a right cylinder, each of the left and right cylinders comprising a piston joined together for corresponding reciprocating movement such that the left and right pistons of the left and right cylinders form four dedicated chambers during repeating cyclical operation for compression, explosion after ignition, exhaust and intake.