Nail gun or similar with IC motor has fuel feed duct from fuel source to combustion chamber, connected to bypass channel to divert part fuel volume

摘要

The tool has a fuel source (11) and a combustion chamber (13), and a fuel dosing valve (15). A fuel feed (12) from source to chamber is connected to a channel (22), by a regulator device (30), to divert a part fuel volume away from the chamber. The channel end (23) away from the fuel feed opens into an exhaust (19). The regulator has an actuator element (31) operated by an external control part (36). The fuel feed line contains a nozzle (26) to reduce the size of its cross section. The actuator element has a passage channel (32) and a bypass channel (33).