Patent ID: 6575427
Filing Date: 2003-06-10
Classification: F02D,F05C,F16K

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 first 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 having a spring biased plunger member and a plunger housing, said plunger member being positioned to engage and apply a biasing force against 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 range of travel relative to said plunger housing; said plunger member being moved throughout said range of travel during normal operation of said electronic valve control assembly and rotation of said throttle valve; said stop shoulder being positioned substantially perpendicular to said longitudinal axis of said plunger member at a point in the range of travel of said plunger member; wherein friction between and wear of said stop shoulder and plunger member are reduced, and wherein deflection of said first gear member is reduced.