Claims
- 1. A throttle actuator comprising:
- an intake pipe of feeding vaporized fuel to an engine,
- a throttle valve arranged in said intake pipe and adapted to rotatably be driven to open and closed positions,
- a throttle valve shaft supporting said throttle valve and rotatably mounted on a portion of a vehicle,
- a motor for supplying a torque to said throttle valve shaft,
- a first link member secured to and transmitting a torque to said throttle valve shaft,
- a second link member having two stopper parts engageable with said first link member and movable in response to an accelerator depression amount,
- a motor control means for controlling said motor,
- an accelerator returning means of always supplying a torque to said throttle valve shaft so as to close the throttle valve, and
- said first link member being coupled to said second link member in a manner that said first link member is allowed to rotate between said two stopper parts, and said motor control means driving said motor to control said throttle valve shaft so as to make said first link member rotate between said two stopper parts.
- 2. A throttle actuator in accordance with claim 1, further comprising:
- an accelerator opening sensing device for detecting a moving amount of an accelerator, and
- said motor control means driving said motor in response to an output of said accelerator opening sensing device.
- 3. A throttle actuator in accordance with claim 1, wherein:
- said two stopper parts are both edges of a slot and
- said first link member is coupled to said second link member with a pin fixed to the first link member and inserted to said slot.
- 4. A throttle actuator in accordance with claim 1, further comprising:
- a stator return spring connected with a stator of the motor for rotating said stator to bring the throttle valve to a full-closed position if abnormality arises, and
- a stator locking means for normally locating said stator in a locked position, while releasing said stator in case of emergency, and
- said motor control means issuing a command to said stator locking means as to the stator to be released into rotation, when the motor control means judged that the motor is in the lock.
- 5. A throttle actuator in accordance with claim further comprising:
- a stator return spring connected with a stator of the motor for rotating said stator to bring the throttle valve to the full-closed position, and
- a wire movable dependent on the accelerator depression amount and being connected with the stator of the motor.
- 6. A throttle actuator in accordance with claim 1, wherein:
- said second link member is provided with an upper-limit link member and a lower-limit link member,
- said upper- and lower-limit link members are connected through a wire directly or indirectly to an accelerator pedal respectively so that they may separately rotate in response to the accelerator pedal depression amount.
- 7. A throttle actuator in accordance with claim 6, wherein:
- a torque transmission means for transmitting rotations of the upper- and lower-limit link members,
- a wire coming from the accelerator pedal is connected with either upper-limit link member or lower-limit link member, and link member not connected with the wire is supplied with a torque from the other link member through said torque transmission means.
- 8. A throttle actuator in accordance with claim 1, wherein:
- said motor takes a form of a stepping motor.
- 9. A throttle actuator in accordance with claim 1, wherein:
- said throttle valve takes a form of a S-shaped valve.
- 10. A throttle actuator in accordance with claim 1, further comprising:
- a cruise control device, which produces an output to control the motor when a constant speed run is needed.
- 11. A throttle actuator comprising:
- an intake pipe of feeding vaporized fuel to an engine,
- a throttle valve arranged in said intake pipe and adapted to rotatably be driven to open and closed positions,
- a throttle valve shaft supporting said throttle valve and rotatably mounted on a portion of a vehicle,
- a motor for supplying a torque to said throttle valve shaft,
- a first link member secured to and transmitting a torque to said throttle valve shaft, and having two stopper parts,
- a second link member engageable with said first link member by said two stopper parts and movable in response to an accelerator depression amount,
- a motor control means for controlling said motor,
- an accelerator returning means of always supplying a torque to said throttle valve shaft so as to close the throttle valve, and
- said first link member being coupled to said second link member in a manner that said first link member is allowed to rotate by said two stopper parts, and said motor control means driving said motor to control said throttle valve shaft so as to make said first link member rotate by said two stopper parts.
- 12. A throttle actuator in accordance with claim 11, further comprising:
- an accelerator opening sensing device for detecting an moving amount of an accelerator, and
- said motor control means driving said motor in response to an output of said accelerator opening sensing device.
- 13. A throttle actuator in accordance with claim 11, wherein:
- said two stopper parts are both edges of a slot and
- said first link member is coupled to said second link member with a pin fixed to the second link member and inserted to said slot.
- 14. A throttle actuator in accordance with claim 11, further comprising:
- a stator return spring connected with a stator of the motor for rotating said stator to bring the throttle valve to a full-closed position if abnormality arises, and
- a stator locking means for normally locating said stator in a locked position, while releasing said stator in case of emergency, and
- said motor control means issuing a command to said stator locking means as to the stator to be released into rotation, when the motor control means judged that the motor is in the lock.
- 15. A throttle actuator in accordance with claim 11, further comprising:
- a stator return spring connected with a stator of the motor for rotating said stator to bring the throttle valve to the full-closed position, and
- a wire movable dependent on the accelerator depression amount and being connected with the stator of the motor.
- 16. A throttle actuator in accordance with claim 11, wherein:
- said second link member is provided with an upper-limit link member and a lower-limit link member,
- said upper- and lower-limit link members are connected through a wire directly or indirectly to an accelerator pedal respectively so that they may separately rotate in response to the accelerator pedal depression amount.
- 17. A throttle actuator in accordance with claim 16, wherein:
- a torque transmission means for transmitting rotations of the upper- and lower-limit link members,
- a wire coming from the accelerator pedal is connected with either upper-limit link member or lower-limit link member, and link member not connected with the wire is supplied with a torque from the other link member through said torque transmission means.
- 18. A throttle actuator in accordance with claim 11, wherein:
- said motor takes a form of a stepping motor.
- 19. A throttle actuator in accordance with claim 11, wherein:
- said throttle valve takes a form of a S-shaped valve.
- 20. A throttle actuator in accordance with claim 11, further comprising:
- a cruise control device, which produces an output to control the motor when a constant speed run is needed.
Priority Claims (2)
Number |
Date |
Country |
Kind |
4-023505 |
Feb 1992 |
JPX |
|
4-051110 |
Mar 1992 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 08/013,384, filed Feb. 4, 1993, which application is now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (3)
Number |
Date |
Country |
0377875 |
Jul 1990 |
EPX |
0413082 |
Feb 1991 |
EPX |
2599805 |
Dec 1987 |
FRX |
Continuations (1)
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Number |
Date |
Country |
Parent |
13384 |
Feb 1993 |
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