VIRVELBILDANDE KANAL, SERSKILT I INSUGNINGSSYSTEMET I FORBRENNINGSMOTORER AV KOLVTYP

摘要

1442605 I C engines admission and exhaust passages L ELSBETT and G ELSBETT 16 Aug 1973 [29 Aug 1972] 38717/73 Addition to 1442442 Heading F1B The admission or exhaust passage according to the Parent Application is modified in that the passage is of trapezoidal cross-section, over the whole length of the helical portion, there being a portion preceding the helical portion over which the passage shape changes from round or rectangular to trapezoidal.