Throttle device

Details Throttle device Throttle device

2006-10-10

2006-10-10

Wolfe, Jr., Willis R. (Department: 3747)

Internal-combustion engines

Engine speed regulator

Open loop condition responsive

C123S399000, C123S336000, C251S129120

Reexamination Certificate

active

07117848

ABSTRACT:
According to the present apparatus, there are provided throttle valves20that are disposed in intake passages, a throttle shaft30that supports the throttle valves20to be opened/closed, drive means40that rotatably drives the throttle shaft30, and a torsion type return spring50that deforms in a manner interlocked with the turn of the throttle shaft30, and returns the throttle valves20to a rest position on a close side, and a deformation force transmission mechanism60including a speed reducing gear62is provided to cause a torsion deformation on the return spring50within an angular range smaller than the rotation angle range of the throttle shaft30. As a result, the maximum energizing force is reduced. Consequently, the maximum energizing force of the return spring is reduced on the throttle apparatus where the throttle valves are returned to the rest position by the return spring.

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