Carburetor arrangement of a portable handheld work apparatus

摘要

The invention relates to a carburetor arrangement of a portable handheld work apparatus and includes a carburetor ( 1 ), an accelerator pump ( 2 ) and a venting pump ( 3 ). The venting pump ( 3 ) acts on the accelerator pump ( 2 ) via a venting line ( 4 ). A check valve ( 5 ) is mounted in the venting line ( 4 ) in such a manner that its outlet end ( 6 ) is directed in the direction of the venting pump ( 3 ). A pretensioning device ( 7 ) is provided which holds a valve body ( 8 ) of the check valve ( 5 ) closed below a selected difference pressure between the outflow end ( 6 ) and an opposite-lying inflow end ( 9 ). A support device ( 10 ) which acts on the valve body ( 8 ) and is actuable, at one end, by pressure at the outflow end ( 6 ) without considering pressure at the other end ( 9 ) or by pressure on the inflow end ( 9 ) without considering the pressure on the other end ( 6 ).