GB1191416A - Improvements in Rotary-Piston Internal Combustion Engines. - Google Patents

Abstract

1,191,416. Rotary-piston internal combustion engines. CHRYSLER CORP. May 28, 1968, No.25588/68. Heading F1F. A rotary-piston I. C. engine comprising an outer body having an internal cavity formed by spaced apart end walls and an inter-connecting peripheral wall having a multi-lobed inner surface within which an inner body having a plurality of circumferentially spaced apex portions around its periphery rotates relative to the outer body about an axis spaced from but parallel to the cavity axis and wherein the outer body includes an intake port for the admission of a gaseous fuel/air mixture, includes for each apex portion a sealing means engaging the inner surface which also communicates with the intake port by means forming a vent passage through the interior of the inner body. As shown, an outer body 23, Figs. 1, 7, having spaced apart end walls 25, 27 and a two-lobed epitrochoidal peripheral wall 29 forming a cavity 31 houses a planetary rotation piston 49 having three apex portions 59. Each end wall includes an intake port 71 and each apex portion is fitted with a sealing and vent means 61, comprising in the direction of piston rotation, a leading sealing strip 103, Fig.2, formed in two parts 109, 111, Fig. 5 (not shown) having complementary sloping faces and a trailing sealing slip 101 similarly formed in two parts 105, 107, Fig.6 (not shown). The strips 103, 101 are mounted with slight lateral clearance in an axially-extending piston groove 91 with adjacent faces thereof formed with cut-out portions having deeper confronting recesses 137, 135. The recess 137 communicates through ports 145 and aligned ports 147 in radiallymounted tubular piston members 149 having lateral ports 159 with transfer tubes fitted with plugs 163 having restricted bores 165 communicating with piston recesses 167 on the piston end-faces between end-face gas seals 63 and oil sealing rings 77 with the recesses 167 communicating with the intake ports 71. In operation, in the chamber opposite the spark-plug in which maximum compression occurs, the sealing means are urged as units and leave a gap between the trailing strip 101 and the side of the groove 91 at the leading end of the chamber and a gap between the leading strip 103 and the side of the groove 91 at the trailing end of the chamber, so that any unburned fuel/air mixture entering the grooves assists springs 115, 117 urging the strips 101, 103 into sealing engagement with the inner surface 28 of the cavity 31 and the unburnt fuel/air mixture leaking from the chamber passes through the vent passage to be transferred to the inlet ports for burning during the next combustion cycle and thus prevents pollution of the atmosphere.