peculiar to machines or engines of specific type other than four-stroke cycle

Full Title

Valve-gear or valve arrangements, e.g. lift-valve gear (lift-valve and valve-seat assemblies per se F01L3/00; slide-valve gear F01L5/00; actuated non-mechanically F01L9/00; valve arrangements in working piston or piston rod F01L11/00; modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations F01L13/00) > peculiar to machines or engines of specific type other than four-stroke cycle

Child Classifications

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• F01L 1/38 for engines with other than four-stroke cycle, e.g. with two-stroke cycle (F01L1/26, F01L1/28 take precedence)
• F01L 1/40 for engines with scavenging charge near top dead centre position, e.g. by overlapping inlet and exhaust time
• F01L 1/42 for machines or engines characterised by cylinder arrangements, e.g. star or fan