Abstract:
A method and apparatus for improving the performance of an internal combustion engine in which a piston (10) has a hollow head (11) within the cavity of which there is mounted an open topped frusto-conical bulbous casing (13), the opening of which is covered with a mesh (14) preferably welded to its rim (15). The casing-mesh unit is attached by means of spacers (16) preferably comprising pins (17) and (21) in such a way that a space is formed between the convex exterior walls of the casing (13) and the concave interior walls of the cavity (12) of the piston head (11).
Abstract:
In a fluid machine, wherein fluid flows through working chambers, as in pumps, compressors, motors, transmissions, a rotor and a drive shaft are revolvingly borne in the housing of the machine. Since slight departures of the axes of the rotor and shaft from each other might result in wearing of faces or in widened clearances in the machine, the shaft and rotor are coupled flexibly. The coupling is managed by providing the drive shaft with arms or fingers and the rotor with gaps whereby the gaps are extending into the axially seen medial rotor portion. The arms or fingers are engaging the walls of the gaps in the mentioned medial rotor portion, whereby tilting components of forces, which might occur, when the coupling would be on an axial end of the rotor, are prevented.
Abstract:
A piston bottom for large capacity internal-combustion engines is made by forging a saucer-shaped blank from refractory-forging steel and then in a second forging step transforming the saucer-shaped blank into a cup configuration with a planar rim of the blank being transformed into a cylindrical shoulder and an annular bulge of the blank being transformed into an annular boss for connecting the piston bottom of the cylindrical body of the piston. The blank has a convexity projecting on one side of the blank opposite that formed with the bulge.
Abstract:
A piston assembly for an internal combustion engine is made up from a piston main body and a lubricant reservoir defining member. The piston main body has a cup shaped structure including a crown portion and a hollow cylindrical wall portion joining thereto. The lubricant reservoir defining member includes a shelf plate main body portion formed with first and second depressions which define first and second lubricant reservoirs, and is securely mounted within the cup shaped piston structure with the shelf plate portion generally to and opposing the piston crown. The ratio of the surface area of the first lubricant reservoir to the surface area of the second lubricant reservoir is less than the ratio of the volume of the first lubricant reservoir to the volume of the second lubricant reservoir. Lubricant is supplied more towards the first lubricant reservoir and is drained more from the second reservoir.
Abstract:
External chambers are applied around the working cylinder of an engine to permit high temperature for mechanically weak materials for the very hot parts of the engine, when the external chambers are filled with plural different pressures substantially equal to that in plural different pressure areas in the working cylinder.
Abstract:
To avoid the necessity of piston rings in a piston-cylinder set, it is prsed that the cylinder liner be surrounded by a band consisting of a fiber composite whose thermal expansion in a radial direction is less than that of the cylinder liner, the impediment to expansion presented by the band varying over the length of the cylinder housing; that the piston be constructed with a cap consisting of a piston head facing the combustion chamber and an essentially cylindrical piston skirt adjacent to the cylinder bearing surface, and a force-transmitting core that contains the bearing for the piston pin and the spherical pressure pad; that a force-transmitting connection rotationally symmetrical to the piston's longitudinal axis be provided above the spherical pressure pad; that the cap be connected at the lower edge of the piston skirt to the force-transmitting core, but otherwise no contact be provided between cap and force-transmitting core except in the area of the force-transmitting connection; and that both cylinder liner and cap be fabricated from ceramic material.
Abstract:
An improved heat insulated piston assembly for an internal combustion engine and a method of assembly. The improved piston assembly includes a piston constructed of a sleeve having an interference fit about a heat insulated core. The core has a first end positioned flush with an end of the sleeve and has a second end located within the sleeve with a concave configured cavity formed therein. Mating in the concave configured cavity of the core is a connecting rod having a spherical ball shaped end. The spherical ball shaped end is securely held in the cavity by a retaining ring which attaches to the piston sleeve. The retaining ring allows for limited movement of the spherical ball shaped end of the connecting rod in the cavity while providing a means for returning the piston to its bottom position during the intake stroke.
Abstract:
An engine piston composed of a head and a body separately formed from the head. The head is of ceramic material and the body is light metal or light alloy. The head and the body are connected against axial movement by interengaging means provided on the head and body by rotation of the head relative to the body, and the head and body are then fixed against relative rotation by an anti-turning device, this arrangement preventing development of excessive thermal stress. The piston is of reduced weight, can be mass-produced, and reduces fuel consumption.
Abstract:
Ceramic coatings prevent metal to metal contact between double acting pistons and cylinders. Cylinders and pistons operate in true cylindrical form. Ceramic coated cylinders are gradually brought to operating temperatures while temporary cutting pistons shape the coating to a true cylinder at operating temperature. Cylinders are formed true while cold and cylinders and heads are jacketed with high heat flow conductors so that the cylinders and cylinder heads have uniform operating temperature.