Throttle valve control device

A throttle valve control device including a throttle valve for supplying controlled air to an engine suction pipe, a motor having a shaft for driving said throttle valve, an electromagnetic clutch disposed coaxially with said shaft and driving force transmitting unit having a speed reduction mechanism for transmitting a driving force from said motor, wherein:

• said driving force transmitting unit comprises a driving force transmitting member rotatably carried by said shaft;
• and
• said electromagnetic clutch comprises a clutch rotor secured to said shaft, an armature rotatably carried by said shaft and having a contact member engageable with said clutch rotor, said contact member being greater in diameter than an outer periphery of said driving force transmitting member;
• a biasing member, secured to said unit, for biasing said armature to separate said armature from said clutch rotor;
• and
• a clutch coil for generating magnetic force when energized to engage said armature with said clutch rotor against said biasing member.

A throttle valve control device including a throttle valve for supplying controlled air to an engine, said device comprising:

• a housing for said throttle valve;
• a first lever member connected to said throttle valve for biasing said throttle valve in a direction to open said valve;
• a guard member, biased in the direction to open said throttle valve and engageable with said first lever member in response to an accelerator pedal operation, for limiting said first lever member to open said throttle valve within a set range;
• an electric motor unit disposed in said housing for generating a driving force;
• and
• throttle valve control means, having a speed reduction mechanism, an electromagnetic clutch and a second lever member connected to said throttle valve, for controllably driving said throttle valve through said second lever member under a driving force which is greater than the driving force generated by said motor unit and biasing force of said guard member.

A throttle valve control device including a throttle valve for supplying controlled air to an engine, said device comprising:

• a housing for said throttle valve;
• a first lever member connected to said throttle valve for biasing said throttle valve in a direction to open said valve;
• a second lever member connected to said throttle valve:
• a guard member engageable with said first lever member for biasing said first lever member to limit further opening of said throttle valve;
• an electric driving unit disposed in said housing, said unit having a motor, an electromagnetic clutch disposed coaxially with said motor and a speed reduction mechanism connected to said clutch, for generating a driving force which is greater than a biasing force of said guard member;
• and
• a throttle valve control member connected to said speed reduction mechanism for engaging with said second lever member when said control member opens and closes said throttle valve.

A throttle valve control device including a housing, a throttle valve, a first throttle valve operating system and a second throttle valve operating system,

• wherein said first throttle valve operating system comprises:
• an accelerator pedal,
• a first lever member connected to said throttle valve for biasing said throttle valve to open, and
• a guard member, biased in a direction to open said throttle valve against said first lever member and disposed to engage said first lever member in response to said accelerator pedal, for limiting said first lever member to open said throttle valve within a set value;
• and, wherein said second throttle valve operating system comprises:
• a second lever member connected to said throttle valve,
• an electric motor unit disposed in said housing for generating a driving force;
• an electromagnetic clutch connected to said motor unit for controllably transmitting said driving force,
• a speed reduction unit connected to said electromagnetic clutch for increasing the driving force from said motor unit so that it is greater than a biasing force of said guard member, and
• a control member connected to said speed reduction unit for engaging said second lever member when said second system opens and closes said throttle valve.