Patent GB-740446-A (GB)
Title: Improvements in reciprocating piston engines of the wobbler type
IPC: F16H23/08
Filed: 1952-04-03
Abstract: 740,446. Two-stroke engines; driving-gear; valves. WILLSON, A. E., BLACK, E., and PHILLIPS, G. C. Jan. 5, 1953 [April 3, 1952], No. 8490/52. Classes 7(2) and 7(6) [Also in Groups XXVI and XXVIII] Universal connections as by balls 23. Fig. 1 .  between a wobbler 17, rotatably mounted on an inclined journal 18 of 'an engine shaft 4, and connecting-road 12 of pistons 7 in cylinders 2 substantially parallel to the shaft 4, are made at only two diametrically opposed points on the wobbler 17, lying on a wobbler diameter passing through the intersection of the journal and shaft axes, the wobbler being so constrained, as by guide plates 30. from rotation relative to the cylinders that the connecting-rods are confined to angular movement in one plane. As shown, applied to a two-stroke spark-ignition engine, the cylinders are arranged as a diametrically-opposed pair, Fig. 1. or pairs, each pair. where there are more than one, being connected to a separate wobbler. such as 17<SP>1</SP>, 17<SP>2</SP>, Fig. 3, for a four-cylinder engine, all the balls 23 being located in a common plane normal to the journal axis. a conduit 19 to dry the plugs. The, liquid drains from the plugs into the container 12. the cylinder space is closed by a surface inclined to the cylinder axis, an admission valve 4, Fig. 2, with its stem at right angles to the inclined surface, being arranged in the part of the inclined surface which makes an obtuse angle with the cylinder wall, an injection nozzle 6 is disposed in the cylinder wall on the side which makes an acute angle with the inclined surface and is arranged so as to direct at least part of its delivery towards the air flowing into the combustion space past that peripheral part of the admission valve disc which is nearest to the nozzle. The nozzle 6 may be disposed in the clearance space and may direct a single jet towards the valve 4; alternatively shown the nozzle spray may consist of three jets of which one jet 7 is directed against the air flowing past the part of the valve nearest the nozzle whilst the other jets 8, 9, are directed to the sides of the valves. In a modification. Fig. 3 the nozzle 10 is situated in the part of the cylinder wall traversed by the piston and may direct a, hollow conical spray towards the valve 4. In Fig. 1, the pistons 7 control inlet ports 34, and further pistons 6 in the cylinders 2 controlling exhaust ports 33 are linked to the shaft 4 through a further wobbler. Pump pistons 8 integral with the pistons 7 draw in combustible mixture alternately via a hollow valve 38, fast on the shaft 4 and having a port 40, co-acting with pump inlet ports 42, and a ring of ports 39 through which its interior is in constant communication with a carburetter delivery 35, and each deliver the mixture to the other cylinder 2 via a piston recess or recesses 43 and a transfer duct or ducts 45. The rods 12 are connected to the pistons by normal gudgeon pins or by balls 13. and may have cups 25, mutually adjustable as by screw means, receiving the balls '23. The cylinder block 1 may be cast whole with water &c. jackets 3 or may he built up of cylinders secured as by welding between end plates and either finned for air cooling or provided with water &c. jackets similarly secured to the end plates. The guide plates 30, one of which is provided on at least one side of each rod 12, may be mounted on end casings 28 or on members attached, as appro-. priate, to the block 1 or the casing 10 enclosing the pistons 8. A counter-shaft, chain or otherwise driven from the shaft 4. may power a charging blower delivering to the pumps described, also an ignition distributer or magneto together with other auxiliaries such as a radiator fan and dynamo. Cylinder inlet and exhaust may be controlled by engine-driven rotary, sleeve or poppet valves. The invention is applicable to four-stroke and to compression-ignition engines and to engines having cylinders arranged on either side .of a common wobbler.