Self-Aspirated Reciprocating Internal Combustion Engine

• US 20110146601A1
• Filed: 12/22/2009
• Published: 06/23/2011
• Est. Priority Date: 12/22/2009
• Status: Abandoned Application

• Current Assignee: Patrick T. Fisher
• Original Assignee: Patrick T. Fisher
• Inventors: Fisher, Patrick T.
• Application Number:
  US12/644,902
• Publication Number:
  US 20110146601A1
• Time in Patent Office: Days
• US Class Current: 123/62
• CPC Class Codes: F01B 2009/063 Mono-lobe cams
• CPC Class Codes: F01B 2009/066 Tri-lobe cams
• CPC Class Codes: F01B 9/047 with rack and pinion
• CPC Class Codes: F01B 9/06 the piston motion being transmitted by curved surfaces
• CPC Class Codes: F02B 33/06 with reciprocating-piston pumps other than simple crankcase pumps
• CPC Class Codes: F02B 33/20 with pumping-cylinder axis arranged at an angle to working-cylinder axis, e.g. at an angle of 90 degrees
• CPC Class Codes: F02B 33/22 with pumping cylinder situated at side of working cylinder, e.g. the cylinders being parallel
• CPC Class Codes: F02B 75/16 Engines characterised by number of cylinders, e.g. single-cylinder engines F02B75/26 takes precedence
• CPC Class Codes: F02B 75/22 with cylinders in V, fan, or star arrangement
• CPC Class Codes: F02B 75/222 with cylinders in star arrangement
• 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: F16J 7/00 Piston-rods

Abstract

Disclosed are crankshaft, single-plate cam and beam mechanisms that provide significant improvements in performance for 2- & 4-stroke engines, compressors and pumps. These cost effective mechanisms include linkages with the new and improved use of pivoting arms that operate with a variety of cylinder arrangements. One embodiment of the crankshaft mechanism has its crankpin roller positioned within a novel yoke-arm. The cam mechanism uses a pair of centrally positioned parallel links that are connected to roller cam followers and single or diametrically-opposed pistons. A pair of laterally extending follower arms connects to the ends of the links to provide support and alignment for the piston rods. Between the reciprocating links, cam followers and follower arms is a rotating odd-lobe plate cam. A beam mechanism uses opposite-direction extending balancing beams that are connected to links, cam followers and piston rods.

Claims

1. A self-aspirated reciprocating internal combustion engine that has a laterally-reciprocating slider seal for sealing around an oscillating piston rod which functions with an under-piston pump comprising:

a cylinder containing a double-acting reciprocating piston for combustion at the piston head end and a piston pump at the under-piston end;

an engine case attached to the cylinder;

an eccentric mechanism including a pivotally attached piston rod and rotatable power shaft supported within the case, the piston rod pivotally connected at its opposite end to the piston;

the under-piston pump providing induction and compression of the air during piston reciprocation for delivering air to the combustion chamber;

a casehead seal guide plate including a passage through which the piston rod extends and having space apart parallel upper and lower laterally-extending seal guide surfaces; and

a laterally-reciprocating slider seal configured to seal around the piston rod and the casehead seal guide plate, the slider seal having a pair of spaced apart parallel upper and lower seal sliding surfaces for supporting and guiding the slider seal back-and-forth while the piston rod oscillates, thereby providing a sealing means during induction and compression of gases within the under-piston pump.

2. The engine of claim 1 wherein the reciprocating slider seal has a convex inner surface fitting around its associated piston rod.

3. The engine of claim 1 further comprising a piston rod slider seal having a swiveling spherical inner-ring disposed within an outer-ring socket, thereby reducing wear between the piston rod and seal.

4. A self-aspirated reciprocating two or four-stroke cycle internal combustion engine including an under-piston pump and connecting pulse case comprising:

a double-acting piston mounted for reciprocation within a cylinder, the piston performs a power cycle at its head end;

an eccentric mechanism with a rotatable power shaft operatively connected to the piston by a piston rod;

an under-piston pump providing induction and compression within the under-piston end of the cylinder;

a pulse case with the eccentric mechanism mounted within it, the pulse case connected to the cylinder;

a pump intake port allowing induction of the charge;

a pump transfer pipe with associated check valve connecting the pump to the pulse case, the pump compressing the charge through the pipe for delivery into the pulse case; and

at least one transfer port with associated check valve connecting the pulse case to the combustion chamber, the pulse case delivering compressed charge through the transfer port for combustion at the piston head end.

5. A self-supercharged reciprocating four-stroke cycle internal combustion engine including a piston pump comprising:

a double-acting piston reciprocating within a cylinder;

a cylinder head containing a poppet-valve intake port;

an eccentric mechanism with a rotatable power shaft operatively connected to the piston by a piston rod;

a pulse case compression pump or under-piston pump;

a pump intake check valve functioning with the pump; and

a pump transfer port disposed on one side of the cylinder, the lower end of the transfer port connected to the pump, the upper end of the transfer port connected to the poppet-valve intake port of the cylinder head, during the pump intake stroke, the piston providing induction of air through the pump intake check valve into the pump, during alternating pump compression strokes, the piston compressing air through the transfer port and the open poppet-valve intake port, the combustion chamber receiving an air charge during alternating pump compression strokes.

6. The internal combustion engine of claim 5 further comprising:

a plurality of double-acting pistons reciprocating generally in unison within cylinders having combustion chambers;

a plurality of cylinder heads containing poppet-valve intake ports;

the eccentric mechanism with a rotatable power shaft operatively connected to the pistons by piston rods;

at least one interconnected pulse case compression pump or under-piston pump; and

the upper end of at least one transfer port connected to at least one corresponding poppet-valve intake port of the heads, during the pump intake stroke, the pistons providing induction of air through the pump intake check valve into the pump, during the pump compression stroke, the pistons compressing air through the at least one transfer port and at least one open poppet-valve intake port, each combustion chamber receiving an air change during alternating pump compression strokes.

7. A self-aspirated reciprocating internal combustion engine including an intake manifold for interconnecting an engine case and at least one under-piston pump comprising:

a double-acting piston mounted for reciprocating within a cylinder, the piston performs a power cycle at its head end;

an eccentric mechanism with a rotatable power shaft operatively connected to the piston by a piston rod;

an under-piston pump providing induction and compression within the under-piston end of the cylinder; and

an intake manifold with an intake check valve, the intake manifold having air passages connecting the engine case and the under-piston pump, the under-piston pump compressing and delivering air to the combustion chamber.