Patent ID: 6622984
Filing Date: 2003-09-23
Classification: F02D,F05C

Abstract:
An electronic valve control assembly with a failsafe mechanism comprising:a housing having an air flow passageway; a gear train positioned in the housing and having a first gear member and a second gear member; said first and second gear members in mesh with each other, and said first gear member having a stop shoulder thereon; a motor positioned in the housing and having a third gear member, said third gear member being in mesh with said second gear member; a throttle shaft member positioned in said housing and connected to said third gear member and rotatable therewith; a throttle valve positioned in said air flow passageway, said throttle valve being secured to said throttle shaft member and rotatable therewith; and a plunger mechanism positioned in said housing and comprising a plunger member and a first spring biasing member, said first spring biasing member having an hourglass shape, said plunger member being positioned to engage said stop shoulder on said first gear member during a portion of the range of rotation of said first gear member; said plunger member having a longitudinal axis and a plurality of ribs and recessed portions in-between said ribs, said rib members being elongated and extending parallel to said longitudinal axis, wherein contact with said spring biasing member and friction are minimized.