| 摘要 |
PROBLEM TO BE SOLVED: To obstruct the invasion of an oil component and moisture stuck to the negative pressure passage to an intake negative sensor, in the device in which the intake negative pressure in a bore on the down streamside than a throttle valve is introduced to the intake negative pressure sensor through a negative pressure passage. SOLUTION: The intake negative pressure in a bore 2 on the down streamside than a throttle valve 3 is introduced to the intake negative sensor 7 by the negative pressure passage 5 formed in a throttle body 1. Return surfaces 5i, 5j pointing to the upper streamside are formed on the wall surfaces 5g, 5h forming the negative pressure passage 5.
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