Extremely ignited two-stroke piston engine with crankcase flushing.

摘要

An externally ignited two-stroke internal combustion engine with crankcase scavenging has a fuel injection nozzle (8) and a throttle element (11), which is provided in the air inlet in front of inwardly opening closing tongues (12, 15). In order to obtain a good throttle response, to achieve favourable values in the partial load range and to prevent undesirable fuel-air mixtures when the throttle element (11) is opened rapidly, the closing tongues (12, 15) are located directly after the throttle element (11). In addition the throttle element (11) is so designed that from the idling position up to a predetermined partial load position it only opens a branch pipe (14), which leads to the area of the outlet (8') of the fuel injection nozzle (8), aiding the flow, and has its own closing tongue (15). The internal diameter of the branch pipe (14) is only a fraction of the internal diameter of the overall inlet. …IMAGE…