Carburetor with starting means

Abstract

A carburetor for an internal combustion engine including a main suction conduit having a control throttle and a starting suction conduit having an on-off valve and opening at one end in a portion of the main suction conduit disposed downstream of the control throttle, wherein a main fuel passage and a main air bleed passage having a main air bleed for the main fuel passage are provided for the main suction conduit. A communication passage is provided to communicate a portion of the starting suction conduit disposed upstream of the on-off valve with a portion of the main air bleed passage disposed upstream of the main air bleed. By this arrangement, when the throttle valve is opened to accelerate the engine before it is completely warmed up after being started, the suction pressure from the starting suction conduit is transmitted through the communication passage to the upstream side of the main air bleed passage whereby the fuel-air mixture supplied through the main suction conduit to the engine can be enriched substantially at a uniform rate.

Dependencies are inferred from the claim text.