Throttle apparatus for internal combustion engine
AssigneeDenso Corporation
InventorsKatsuya Torii, Yuichiro Miura
Life of this patent
Estimating the term…
Abstract
A metal plate is made of a material having strength higher than a resin material for forming a throttle body and is disposed in the throttle body. The plate supports one end of a throttle shaft, fixes a shaft, and holds a motor. When the throttle body is made of a resin material, therefore, the rigidity of the throttle apparatus is enhanced and high dimensional accuracy among the throttle shaft, the shaft, and a rotary shaft can be assured.
Claims13
A throttle apparatus for adjusting an air flow rate through an air path formed in an internal combustion engine, said throttle apparatus comprising:
- a resin throttle body material having an air path formed therein;
- a valve member provided in the throttle body that controls an opening angle of the air path;
- electric driving device housed in the throttle body, said electric driving device generating a driving force that drives the valve member;
- and
- a holding member provided in the throttle body that rotatably supports the valve member, said holding member holding the electric driving device, said holding member being made of a material having strength higher than a resin material used for forming the throttle body.
A throttle apparatus for adjusting an air flow rate through an air path formed in an internal combustion engine, said throttle apparatus comprising:
- a resin throttle body material and having an air path formed therein;
- a valve member provided in the throttle body so as to control an opening angle of the air path;
- an electric driving device housed in the throttle body, said electric driving device generating a driving force that drives the valve member;
- a transmitting device connected to the electric driving device, said transmitting device transmitting the driving force from the electric driving device to the valve member;
- a supporting member that rotatably supports the transmitting device;
- and
- a holding member provided in the throttle body that affixes the supporting member and holds the electric driving device, said holding member being made of a material having strength higher than a resin material used for forming the throttle body.
A retaining member for retaining a position between elements of a throttle body, comprising:
- a plate made of a material, wherein said plate has:
- a first bore having a diameter sized to support a throttle shaft of a throttle valve;
- a second bore having a diameter sized to support an electric driving device, a centerline of said second bore being positioned a predetermined distance from a centerline of said first bore;
- and
- an outer periphery of said plate sized to fit within a recess of a resin throttle body, said material having a strength higher than that of said resin throttle body.
A retaining member for retaining a position between a throttle shaft, electric driving device, and a transmitting device of a resin throttle body, said retaining member comprising:
- a plate made of a material having:
- a first bore with a diameter sized to support a bearing, said bearing having a diameter sized to support a throttle shaft of a throttle valve;
- a second bore having a diameter sized to support an electric driving device;
- a third bore having a diameter sized to support a transmission member;
- wherein centerlines of said first bore, said second bore and said third bore are positioned in said plate at predetermined distances from each other;
- and
- whereby said throttle shaft, said electric driving device and said transmission member are maintained at a predetermined relationship with each other when said plate is assembled in said resin throttle body;
- an outer periphery of said plate that fits within a recess of said resin throttle body, said material having a strength higher than that of said resin throttle body.
Dependencies are inferred from the claim text.