Insulator

Abstract

An insulator is provided with a housing section integrated with an insulating section at a lower portion thereof. The housing section forms a part of a housing of an acceleration pump. Accordingly, the acceleration pump can be disposed at a space around the insulator, which is conventionally a dead space. Thus, a dedicated space for installing the acceleration pump is not required, which achieves space saving. Further, since the acceleration pump is disposed directly around the insulating section, even when a duct that intercommunicates an insulator leading-air passage and the acceleration pump is used, the length of the duct can be reduced to simplify a structure of the interconnection. Furthermore, since the housing section is integrated with the insulating section, the number of components can be reduced to reduce costs and facilitate assembly of the acceleration pump.

Dependencies are inferred from the claim text.