Two stroke motor for e.g. chain saw, has air canal where entry for fuel is separated in crankshaft case, and fuel proportioning system with electromagnetic valve and unit to carry fuel based on nozzle position and/or motor speed

摘要

The motor has a crankshaft rotatably mounted in a case. An exit allows air to escape from a combustion chamber, and an air canal (9) carries combustion air in the case. A nozzle is placed in the canal, where an entry for fuel (13) is separated in the case. The fuel is supplied by a fuel proportioning system (15) having an electromagnetic valve. The system has a unit to carry fuel based on nozzle position and/or motor speed. The combustion chamber formed in a cylinder is restricted by a piston whose rising and lowering is carried by an intermediate rod. The combustion chamber is linked to the crankshaft case at a preset position of the piston by an intermediate transfer canal. An Independent claim is also included for a method of operating a two stroke motor.