Internal-combustion engines – Rotating cylinder – Radial
Patent
1999-02-22
2000-12-19
Koczo, Michael
Internal-combustion engines
Rotating cylinder
Radial
F02B 5710
Patent
active
061615080
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a device in a rotary radial-piston engine of the kind defined in the preamble of Claim 1.
A radial-piston engine of this kind is described e.g. in Applicant's U.S. Pat. No. 5 357 911 and PCT/SE95/00149. The radial-piston engine described therein is a four-stroke engine comprising a stationary housing, a drive shaft which is rotationally mounted essentially centrally inside said housing and which supports a hub co-rotating therewith, radially projecting cylinders which are mounted on the hub for rotation therewith, said cylinder being positioned inside a circumferentially extending chamber in said housing and each receiving a piston which is mounted for radial reciprocating movement therein, the piston heads of said pistons facing radially inwards towards the hub, a circumferentially extending guide cam, said cam being mounted inside the housing in alignment with the pistons adjacent the radially outwardly directed piston ends and having a cam face facing said pistons, bearing means mounted on each piston abutting against said cam face in order to impart a radial movement to said pistons in the direction towards the hub upon rotation of the rotary unit formed by the pistons, the cylinders, the hub, and the drive shaft, relative to the stationary housing, and combustion chambers formed in said hub essentially in alignment with the heads of the respective pistons, each combustion chamber having valve-operated inlets/outlets for intake and exhaustion, respectively, of a gas taking part in the combustion an of combusted exhaust gases, respectively, so as to impart a radial movement to said pistons in a direction away from the hub in response to the pressure increase upon combustion and to the centrifugal force, said inlets/outlets to and from, respectively, each combustion chamber being formed axially in a valve ring which co-rotates with the hub and which is essentially concentric therewith, said valve ring sealingly abutting against a stationary port ring which is essentially concentric with the valve ring and which is connected to the housing, said port ring being formed with axial intake and exhaust ports communicating with inlet and outlet ducts and arranged, upon rotation of said rotary unit relative to the housing, to alternatingly assume a position in alignment with that inlet/outlet in the valve ring that is associated with the respective combustion chamber.
The object of the invention is to improve the combustion efficiency even further, with resulting fuel-consumption savings as well as reduced effects on the environment.
This object is obtained in a device in accordance with the invention which is essentially characterized in that an injection duct extends through the port ring, one end of said duct being connected to an injection pump system and the opposite end of said duct, which is positioned in said port ring, debouching, via an injection nozzle, into the combustion chamber at a point in close proximity to the place where the combustion chamber, disposed in said rotor, is positioned upon ignition of the combustion gas, and in that said valve ring has a through opening which in said position of the rotor forms an open communication means between the injection nozzle and the combustion chamber.
The invention will be described in closer detail in the following with reference to the accompanying drawing illustrating a presently preferred embodiment thereof. In the drawings:
FIG. 1 is a cross-sectional view through an engine in accordance with the subject invention, being shown air a first operative position,
FIG. 2 is a longitudinal section through the same engine taken on line II--II of FIG. 1,
FIG. 3 illustrates the engine in a second operative position thereof,
FIG. 4 is a longitudinal section taken on line IV--IV of FIG. 3, and
FIG. 5 is an exploded view of a valve system incorporated in the device.
FIG. 5a is an enlarged side view of a sealing ring,
FIG. 5b is an enlarged view of a valve ring.
The engine illustrated in the drawings is a four-stroke internal com
REFERENCES:
patent: 686801 (1901-11-01), Box et al.
patent: 951388 (1910-03-01), Conill
patent: 1990660 (1935-02-01), McCann
patent: 5357911 (1994-10-01), Lindblad
Kesol Production AB
Koczo Michael
LandOfFree
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