Two stroke oscillating piston engine

• US 4,414,927 A
• Filed: 04/16/1982
• Issued: 11/15/1983
• Est. Priority Date: 04/16/1982
• Status: Expired due to Fees

• Current Assignee: Istvan Simon
• Original Assignee: Istvan Simon
• Inventors: Simon, Istvan
• Primary Examiner(s): Burns, Wendell E.
• Application Number:
  US06/368,985
• Time in Patent Office: 578 Days
• Field of Search: 123/62, 123/69 R, 123/69 V, 123/61 R, 123/61 V, 123/57 B, 123/56 BC, 123/56 L
• US Class Current: 123/62
• CPC Class Codes: F02B 2075/025 two
• CPC Class Codes: F02B 71/00 Free-piston engines; Engines without rotary main shaft

Abstract

A two stroke oscillating piston engine comprising cylinder sections provided with feed chambers for additional fresh air. The two outer rings, acting as pistons, draw in fresh air through intake ports and force that air to enter combustion chambers through communication ducts and ports. The middle ring is intended for the fresh gas supply of the combustion chambers. The radial grooves for fresh air are provided at a shorter distance from the ports than the radial grooves for fresh gas. Burnt and expanded gas is first exhausted from the combustion chambers by fresh gas; then the combustion chambers are filled with fresh gas and fresh air. Thus, exhausting unburnt gas together with burnt gas is avoided and improved combustion is provided in the combustion chambers.

Claims

1. A two stroke oscillating piston engine with at least one reciprocating piston barrel and a corresponding number of hollow cylinders designed for two stroke operation and provided with fresh gas intake ports, fresh gas communication ducts and exhaust gas outlet ports, with this hollow cylinder composed of parallel sections bolted together and with the piston barrel actively connected with a crank gear so that the radial component forces on the piston barrel are kept as low as possible, characterized in that the piston barrel has a cylindrical shaft on which are fitted three cylinder-shaped rings acting as pistons, that the hollow cylinder surrounding the piston barrel has in its longitudinal center a cylinder section that is symmetrical with regard to this center and whose axial bore is divided by the middle ring of the piston barrel into two fresh gas feed chambers, with this cylinder section displaying, symmetrically to its longitudinal center, two fresh gas intake ports arranged side by side, and with the feed chambers connected at their outer ends each by one radial groove with the corresponding fresh gas communication duct, that on both front faces of the middle cylinder section is provided the same partition with the passing section of the pertaining fresh gas communication duct, that then and on these two partitions are assembled two reciprocally symmetrical working cylinder sections whose axial bores are divided by the two outer rings of the piston barrel into one inner combustion chamber and one outer fresh air feed chamber, that in the longitudinal center, at least, of these working cylinder sections are arranged two radial ports side by side, with the inner ports designed as exhaust gas outlet ports and the outer ports as fresh air intake ports, and that, diametrically opposed to the exhaust gas outlet ports, one radial communication port each leads to the pertaining fresh gas communication duct and at the outer ends of the fresh gas feed chambers, one radial fresh air groove each leads to the corresponding fresh gas communication duct.

2. A two stroke oscillating piston engine according to claim 1, characterized in that the distance separating the radial fresh air grooves from the radial communication ports is smaller compared to the distance separating the radial fresh gas grooves from the radial communication ports.

3. A two stroke oscillating piston engine according to claim 1, characterized in that the two working cylinder sections are sealed by one outer wall each.

4. A two-stroke oscillating piston engine comprising:

a hollow cylinder;

2 partition walls spaced substantially equidistant from the longitudinal center of said cylinder and dividing said cylinder into a central gas inlet space;

a first combustion space on one side of said central gas inlet space, and;

a second combustion space on the other side of said central gas inlet space;

a piston rod for reciprocating in said hollow cylinder;

a central piston carried by said piston rod for reciprocating in said central gas inlet space;

a first piston having a predetermined axial width carried by said piston rod for reciprocating in said first combustion space;

a second piston having a predetermined width carried by said piston rod for reciprocating in said second combustion space;

a first and second gas inlet aperture in said hollow cylinder communicating with said central gas inlet space and spaced so that said center piston opens one of the said gas inlet apertures while closing the other of said gas inlet apertures;

first conduit means to connect said central gas inlet space with said first combustion space;

a first air inlet aperture located in said cylinder near the outer end of said first combustion space;

a first exhaust aperture in said cylinder spaced inwardly from said first air inlet aperture;

a second air inlet aperture located in said cylinder near the outer end of said second combustion space;

a second exhaust aperture in said cylinder spaced inwardly from said second air inlet aperture;

reciprocating movement of said center piston away from that first combustion space opening said first gas inlet aperture;

reciprocating movement of said center piston towards said second combustion space opening said second gas inlet aperture while closing said first gas inlet aperture;

the predetermined width of said first and second piston being of a dimension in relation to the locations of said air inlet apertures and said exhaust apertures being arranged so that said first and second pistons alternately close and open the respective air inlet and exhaust apertures in the respective combustion spaces.