GB402036A - Improvements in or relating to internal combustion engines - Google Patents

Abstract

402,036. Rotary internal-combustion engines. DUPAU, F., 3, Rue Lebrun, Paris. Feb. 15, 1932, No. 4477. Void [Abridged as open to inspection under Sect. 91 of the Acts, Feb. 24, 1932]. [Class 110 (ii).] A rotary internal-combustion engine comprises a pair of continuously rotating sector pistons 19 which cooperate with a pair of sector pistons 17 alternately held stationary and then rotated at a greater speed to approach the first pistons so that the spaces conrined between the pistons vary in volume, the spaces 35 between the rear faces of the continuously moving pistons 19 and the front faces of the alternately moving and stationary pistons 17 being used for a four-stroke internal-combustion-engine cycle and the other spaces 36 for the intake and discharge of air whereby cooling is effected, the admission and discharge to both sets of spaces 35, 36 being controlled by a ported disc 5 which is fixed to the engine shaft 4 and co-operates with ports in a partition wall 1a which divides the main casing into distribution and working chambers 2, 3. The continuously moving pistons are fixed to two small discs 20 one of which is keyed to the shaft 4 while the alternately moving and stationary pistons are secured to a sleeve 18 which surrounds the shaft 4 and is driven by gearing 30, 29 from the Maltese cross unit 24 of a Geneva mechanism, the disc and pin member 28 of which is fixed to the shaft 4. This mechanism is contained in a separate housing 23 and is splash or otherwise lubricated. The partition wall 1a contains: ports 13 through which the mixture is drawn so long as an arcuate port 7 in the valve disc 5 registers therewith ; ports 16 which are always open to a circular groove 11 in the valve disc which is permanently open to the atmosphere by ports 12 and the port 2<1> in the distribution chamber wall ; and ports 14, 15 which are likewise open to atmosphere when arcuate ports 10 in the valve disc 5 register therewith. The intermittently moving pistons are formed with rearwardly extending passages 32 having transverse ports to register in their stationary position with the partition ports 16. Figs. 8-11 illustrate the cycle. From the position shown in Fig. 8 the pistons 19 move forward to draw in charges to the two spaces 35, Fig. 9, which charges are compressed as the intermittent pistons 17 overtake the pistons 19, Fig. 10, are then fired and expand, the pistons 17 being now stationary, Fig. 11, until the pistons 19 uncover the exhaust ports 16 whereupon the intermittent pistons 17 again overtake the pistons 19 to expel the exhaust products, Fig. 8. The spaces 36 draw in and expel air to effect cooling. From the position shown in Fig. 8 the pistons 19 move forward to expel air through the passages 32 in the intermittent pistons 17 which are stationary with the passages 32 registering with the partition ports 16, Fig. 9. Thereafter the intermittent pistons move forward and air is drawn in through the ports 16, Fig. 10. The intermittent pistons 17 are then again held stationary so that the air is now expelled by the continuously moving pistons 19 through the ports 16 until they are covered by the continuously moving pistons 19 at which point the ports 14 are now opened by the registering of the ports 10 of the disc valve 5 to allow the completion of this expulsion stroke, Fig. 11. The intermittent pistons 17 again move forward and air is drawn in through the port 15 which is open by the registering of the port 10 of the disc valve, Fig. 8. The air pressure may be utilized for pressure lubrication.