公开(公告)号：US5560345A

公开(公告)日：1996-10-01

申请号：US418448

申请日：1995-04-07

申请人： Werner Geyer ,  Thilo Barth ,  Peter Stucke ,  Horst Eckhardt ,  Harald Schliemann ,  Manfred Rabis ,  Jorg Schlossarczyk

发明人： Werner Geyer ,  Thilo Barth ,  Peter Stucke ,  Horst Eckhardt ,  Harald Schliemann ,  Manfred Rabis ,  Jorg Schlossarczyk

IPC分类号： B27B17/00 ,  F02B63/02 ,  F02B75/02 ,  F02M1/16 ,  F02M17/04 ,  F02M1/08 ,  F02M37/20

CPC分类号： F02M17/04 ,  B27B17/00 ,  F02M1/16 ,  F02B2075/025

摘要： The invention is directed to a start-assist device on a membrane carburetor of an internal combustion engine in a motor-driven chain saw which is to be started manually. The carburetor includes a control chamber delimited by a control membrane. The control chamber is supplied with fuel from a fuel tank via control valve. The control valve is opened by the control membrane when the underpressure builds up in the control chamber so that fuel flows in. This fuel is supplied to the air-inducting intake channel via an idle nozzle and a main nozzle. The fuel feed system further has an outlet for vapor bubbles or the like. A pump which is driven indirectly from the start operation is provided and has a suction connection connected to the outlet in order to ensure, with few start attempts, a reliable start of the engine independently of the temperature state of the engine and other influences.

摘要翻译： 本发明涉及一种手动启动的马达驱动链锯内燃机的膜式化油器上的启动辅助装置。 化油器包括由控制膜限定的控制室。 控制室通过控制阀从燃料箱供应燃料。 当控制室中的负压积聚在控制室中时，由控制膜打开控制阀，使得燃料流入。该燃料经由怠速喷嘴和主喷嘴供给到空气导入进气通道。 燃料供给系统还具有蒸气泡等的出口。 提供从启动操作间接驱动的泵，并且具有连接到出口的吸入连接，以便在发动机的温度状态和其他影响的情况下，几乎没有启动尝试可靠地启动发动机。