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1. 发明专利

JPS60249656A DOUBLE CARBURETOR 失效
公开(公告)号：JPS60249656A
公开(公告)日：1985-12-10
申请号：JP10461384
申请日：1984-05-25
申请人： HITACHI LTD
发明人： UJIIE KENJIROU , ROKUHARA MAKOTO , SEKI YOSHINORI , HORI TOSHIO , NOUZUKA HIROBUMI
IPC分类号： F02M11/02
摘要： PURPOSE:To prevent the delay of the operation of a throttle valve by driving a throttle valve in the secondary-side bore by a servodiaphragm operated by the synthetic pressure of the pressure of a large venturi in the primary-side bore and the pressure of a common venturi in the secondary-side bore. CONSTITUTION:A double carburetor is equipped with large venturies 2a and 2b and the primary side bore 1a and the secondary side bore 1b into which throttle valves 3a and 3b are housed on the downstream side of the venturies. In this case, the pressure introduced into the pressure chamber 5 of a servodiaphragm 4 which drives the secondary-side throttle valve 5b is the synthetic pressure of the pressure supplied from a jet 6a opened at the narrowest part of the large venturi 2a in the primary-side bore 1a and the pressure supplied from a jet 8b opened at the narrowest part of the common venturi 7b in the secondary-side bore 1b. Therefore, the reduction of the synthetic pressure in the case when the primary and the secondary side throttle valves 3a and 3b are perfectly opened is suppressed, and the delay of the operation of the secondary-side throttle valve 3b is prevented.

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