Patent ID: 6253732
Filing Date: 2001-07-03
Classification: F02D

Abstract:
An electronic throttle control assembly comprising:a housing;an air passageway in said housing;a throttle shaft member rotatably positioned in said housing and extending through said air passageway;a throttle plate member attached to said throttle body shaft and positioned in said air passageway;said throttle plate member rotatably between a first position preventing air from passing through said air passageway and a second position allowing a full compliment of air to pass through said air passageway;a motor positioned in said housing having a rotatable motor shaft;a gear assembly positioned in said housing, said gear assembly comprising a first gear member attached to said motor shaft, a second gear member attached to said throttle shaft member, and a third gear member operably positioned between said first and second gear members;wherein operation of said motor rotates said throttle plate between said first position and said second position;a default mechanism positioned on said housing, said default mechanism comprising a main lever member, a main spring member, a default lever member having an arm member and a default spring member;a contact member on said third gear member positioned to contact said arm member on said default lever member;said main spring member positioned between said main lever member and said second gear member, said first spring member biasing said throttle shaft member away from said second position and toward said first position;said default spring member positioned between said main lever member and said default lever member;said default spring member biasing rotation of said throttle body shaft toward a third position of said throttle plate between said first and second positions;wherein in the event of failure of said motor, said throttle plate will be rotated to said third position and allow limited passage of air through said air passageway.