Abstract: A displacement machine for compressible mediums exhibits several spiral-shaped convoying spaces (11a, 11b), which are disposed in a stationary housing (7a, 7b). A displacement body (1-4) is assigned to the conveying spaces and is held in such a manner on a disk-shaped rotor (1) that can be driven eccentrically relative to the housing that during service each of its points effects a circular movement defined by the circumferential walls of the conveying spaces. To this end an eccentric disk (23), on which the rotor (1) is mounted by means of an oil-lubricated mounting, is disposed on the drive shaft (24). A sliding bearing (22) is provided on the rotating eccentric disk (23) for the orbiting rotor (1). The oil is fed in and drawn off by way of a borehole (31) in the eccentric disk. Passages are disposed within the eccentric disk to feed oil without air into the sliding bearing gap.

Abstract: A displacement machine for compressing fluids includes a housing, a rotor in the housing and a drive shaft journalled in the housing and eccentrically mounting the rotor. A guide shaft journalled in the housing by a slide bearing guides the oscillation of the rotor. Intermeshing spiral strips on the rotor and housing produce compression of fluid in working chambers during oscillation of the rotor. In order to lubricate the drive and guide shafts, a lubricating system includes a bore supplying lubricant to the slide bearing, lubricant passages in the drive shaft and an intermediate line connecting the lubricant outlets from the slide bearing to the lubricant passages in the drive shaft. The guide shaft may be hollow to provide a bore therein which also communicates with the lubricant outlets from the slide bearing and supplies lubricant to an eccentric of the guide shaft.

Abstract: In a displacement machine for compressible media, having a delivery space (6) which is delimited by spiral-shaped peripheral walls (8, 9) extending perpendicularly from a side wall and leads from an inlet (2) outside the spiral to an outlet (3) inside the spiral, and having a spiral-shaped displacement body (5) which projects into the delivery space (6) and is mounted with respect to the delivery space so as to execute a rotary, twist-free movement, the center (10) of said displacement body is offset eccentrically relative to the center (11) of the peripheral walls (8, 9) in such a way that the displacement body (5) at all times almost touches both the outer and the inner peripheral wall (9 and 8 respectively) of the delivery space (6) at in each case at least one advancing sealing line. The sealing line at the inlet-side end of the outer peripheral wall (9) is advanced relative to the 0.degree./360.degree. position by an angle (.alpha.) between 5.degree. and 50.degree.

Abstract: In a displacement machine for compressible media, having four delivery spaces arranged in a fixed housing, each housing half (7) has two delivery spaces (11, 11') which are offset by about 180.degree. with respect to one another and extend in a spiral shape from an inlet (12,12') to an outlet (13). Each delivery space is allocated a displacement body which fits into the latter and is held, as a spiral-shaped strip (3,3') perpendicularly on a disk-shaped rotor (1) which can be driven eccentrically with respect to the housing. For the guidance of said rotor a second eccentric guiding arrangement (10) arranged at an interval from a first eccentric drive arrangement (9) is provided in the housing. For the flexible accommodation of any length differences between delivery space and displacement body, the guide eye (5) of the eccentric guiding arrangement is connected to the disk-shaped rotor (1) via a stem (29) which is formed as a tangential extension on the inlet-side end of one of the spiral-shaped strips (3).

Abstract: In a water cooling system for an internal-combustion engine supercharger by means of mechanical supercharger, main cooling circuit for the engine (1) and secondary cooling circuit for the supercharged (9) are operated with the same coolant and are cooled in a joint radiator (2), but in separate compartments, in order to ensre the independence of the respective operating temperatures. An ejector (10), driven by coolant from the main cooling circuit, delivers the secondary medium. The system is suitable in particular for spiral compressors which are provided on the outside with cooling ribs which protrude into externally mounted water chambers.

Abstract: In a rotary-piston displacement machine, to seal the flat sealing planes between the end faces of the displacement body (5), executing a circular motion, and the side faces (20) of the stationary housing (7) which run parallel thereto, the end faces of the displacement body (5) are provided with a groove (13) in which an elastic sealing strip (14) made of slideable material is inserted. The sealing strip is pressed by a silicone tube (15) against the side wall (20).

Abstract: In a free-running pressure wave supercharger driven by the gas forces, nozzles (27) are provided in the gas casing (6) and possibly also in the air casing (5), which nozzles are connected--via a drive line (26)--with a position in the air casing (5), preferably with the high-pressure air port (2), at which position a surplus pressure relative to the nozzle entry occurs during the run-up phase of the pressure wave supercharger. A control device 15 actuates a supercharge air flat (14) in the port (2) and a valve device (23+25) in the drive line (26) in the opposite sense, i.e. if the supercharge air flap (14) holds the port (2) closed, the valve device (23+25) frees the flow through the drive line (26) to the nozzle (27) and vice versa. The diaphragm capsule (17) of the control device (15) is subjected, on one side, to the pressure in a compression pocket (11) via a control pressure line (19) and, on the other side, to the pressure before the supercharge air flap (14) in the port (2).

Abstract: The pressure wave supercharger of the internal combustion engine has a diaphragm capsule (20) for controlling the supercharge air butterfly (14). The diaphragm (21) of the diaphragm capsule is, in operation, subjected on the butterfly side to the high pressure air in the high pressure air duct (2) and on the other side to the pressure at the protrusion 27 or in the compression pocket (5), via a control pressure line (26; 28). These pressures typical of the process vary with the speed of the cell rotor and control the setting of the supercharge air flap as a function of the speed and loading condition of the engine.

Abstract: Whereas the total noise level of an internal combustion engine supercharged by means of a gas-dynamic pressure-wave engine (1) (PWS) is usually only slightly higher than that of an engine supercharged by means of an exhaust-gas turbo supercharger (ETS), the narrow-band noise in the PWS rotational sound frequency range, the so-called PWS "whistle", is considered troublesome. The absorption muffler (3) is an elongate body, the length (l.sub.1) of which is at least 10 times the rotor outside diameter of the PWS. The inside diameter (d) of the muffler (3) corresponds to the inside diameter of the exhaust pipe (4) and is at least 0.6 times the rotor outside diameter of the PWS. The thickness (S) of the insulating material, which directly surrounds the inside diameter (d) or inner cross-section (F) of the muffler (3), is at least 6 times the rotor outside diameter of the PWS divided by the number of cells of the PWS.

Abstract: Provision is made in the induced air duct and/or in the exhaust duct of the pressure wave supercharger for butterfly valves, by the control of which the exhaust gas proportion to be returned to the charge air is matched to the load condition of the engine. The adjustment of the butterfly valve or butterfly valves occurs through a linkage as a function of the load condition of the engine. A correction link acts on the linkage being provided to compensate for pressure alterations in the induced air duct and/or exhaust duct.

Abstract: An internal combustion reciprocating engine includes an intake gas conduit system for supplying each engine cylinder with intake gas. Maximum four engine cylinders whose suction cycles are in a substantially non-overlapping relationship with one another form a cylinder group. The intake gas conduit system has a feed resonator vessel communicating with the intake opening of each cylinder of the cylinder group, a dampening vessel having an intake gas inlet opening and a feed resonance tube maintaining communication between the feed resonator vessel and the dampening vessel. The feed resonator vessel and the feed resonance tube form a first oscillating system in which intake gas oscillations are generated by the effect of periodic suction cycles of the cylinders forming the cylinder group. The intake gas conduit system further has a closed resonator vessel and an equalizing resonance tube maintaining communication between the dampening vessel and the closed resonator vessel.