Piston and a connecting rod apparatus
AssigneeIsuzu Motors Limited
InventorShigeaki Horiuchi
Life of this patent
Estimating the term…
Abstract
A groove in a direction of a crank shaft is provided in an inner surface of a top wall of a cup-shaped inner sleeve. The groove provides a stop for a semicylindrical slidable guide member that cooperates with a cylindrical concave portion of a cylindrical member to smoothly guide oscillation of a pair of arms at a small end portion of a connecting rod. Further, the slidable guide member allows relative sliding movement of the small end portion of the connecting rod in the direction of a crank shaft but inhibits relative rotation along the center axis of the piston.
Claims18
Internal combustion engine apparatus comprising:
- piston means having a crown portion with a bottom surface, and a skirt projecting therefrom and defining a cavity;
- a cup shaped sleeve retained in said cavity and having a bottom wall engaging said bottom surface and a sidewall engaging said skirt;
- a connecting rod having at one end a yoke portion with a pair of parallel, spaced apart, semicylindrical arms each having an upwardly directed concave surface and a downwardly directed convex surface;
- a guide member slidably retained between said bottom wall and said concave surfaces;
- a substantially cylindrical member projecting into said sleeve, fixed to said skirt, and defining spaced apart concave semicylindrical surfaces each engaging one of said convex surfaces;
- and
- sleeve retainer means fixing said sleeve to said cylindrical member.
Internal combustion engine apparatus comprising:
- piston means having a crown portion with a bottom surface, and a skirt projecting therefrom and defining a cavity, an inner surface portion of said skirt defining an annular groove;
- a cup shaped sleeve retained in said cavity and having a bottom wall engaging said bottom surface and a sidewall engaging said skirt;
- a connecting rod having at one end a yoke portion with a pair of parallel, spaced apart, semicylindrical arms each having an upwardly directed concave surface and a downwardly directed convex surface;
- a guide member slidably retained between said bottom wall and said concave surfaces;
- a substantially cylindrical member projecting into said sleeve and defining spaced apart concave semicylindrical surfaces each engaging one of said convex surfaces;
- sleeve retainer means fixing said sleeve to said cylindrical member;
- and
- an elastic ring having a diameter greater than said inner surface portion of said skirt, said elastic ring being contractible to allow passage by said inner surface portion and circumferentially expandable into said annular groove.
Internal combustion engine apparatus comprising:
- piston means having a crown portion with a bottom surface, and a skirt projecting therefrom and defining a cavity;
- a cup shaped sleeve retained in said cavity and having a bottom wall engaging said bottom surface and a sidewall engaging said skirt;
- a connecting rod having at one end a yoke portion with a pair of parallel, spaced apart, semicylindrical arms each having an upwardly directed concave surface and a downwardly directed convex surface;
- a guide member slidably retained between said bottom wall and said concave surfaces;
- said guide member defining spaced apart, parallel and juxtaposed arcuate grooves, each receiving one of said arms and slidably engaging said concave and convex surfaces thereof;
- and
- a cylindrical means projecting into said sleeve and engaged between said guide member and said skirt.
Dependencies are inferred from the claim text.