化油器具有壳体，其中控制鼓可旋转地安装。 在化油器中形成进气通道的一部分。 该部分的一部分形成在控制鼓中。 控制滚筒控制进气通道的自由流动截面。 燃料开口经由通向进气通道的子部分的无分支燃料通道连接到燃料室。 化油器的简单配置是通过化油器实现的，该化油器包括控制通过燃料通道的燃料流动的电致动阀。 对于使用化油器操作内燃机的方法，在发动机启动之前或期间确定温度（T），并且在发动机起动期间通过燃料通道的燃料流量根据 温度（T）。

A carburetor having a housing (18), in which a control roller (22) is rotatably mounted. In the gasifier, a portion (25) of an intake duct (21) is formed. In the control roller (22) a section (27) of the intake duct (21) is formed. The control roller (22) controls the free flow cross section of the intake passage (21). The carburettor (11) has a fuel chamber (28). In the partial section (27) of the intake passage opens a fuel opening (19), which is connected by a straight fuel passage (29) with the fuel chamber (28). A simple construction of the carburettor is achieved in that the gasifier (11) comprises an electrically actuated valve (30) that controls the fuel flow through the fuel passage (29). For a method of operating an internal combustion engine with a carburetor (11) is provided that before or during starting of the engine temperature (T) is determined and that the fuel flow through the fuel passage (29) when starting the internal combustion engine in dependence of the temperature (T ) is controlled.