| 摘要 |
PURPOSE:To restrain a mixture for low-speed running from becoming too rich by a method wherein a cavity, stagnating the uprising of fuel, is provided at a proper position in a plunger or the like, in a cuarburettor in which the control of air and fuel is effected simultaneously by the vertical motion of the plunger caused by the energization of a coil. CONSTITUTION:In the titled electromagnetic valve, the plunger 2 is descended by a distance 11 to close a main jet 8 with a valve 6 and a slow air bleed 1 is opened when an electric current is flowed therethrough. In this case, when the plunger 2 and a rod 5 are reciprocated through a gap under being guided along the inner raidal surfaces of a guide 12, a bobbin 4 and a core 11, the fuel at the gap is forced up and is reserved immediately below the slow air bleed 1. Therefore, a fine diametral section 16 is formed at the intermediate section of the plunger 2', for example, and said fuel being forced up is stagnated in the fine diametral section 16 in order to prevent the fuel from arriving at the part of the guide 12 after exceeding the fine diametral section 16. According to this method, an air volume, proportional to the operation of the plunger 2, may be supplied to an air path 15 and the proper operation of the engine may be permitted. |
