APPARATUS FOR FORCIBLY CLOSING AN ENGINE THROTTLE VALVE

• US 3,722,492 A
• Filed: 12/23/1970
• Issued: 03/27/1973
• Est. Priority Date: 12/26/1969
• Status: Expired due to Term

• Current Assignee: Yasuo Shibata
• Original Assignee: Yasuo Shibata
• Inventors: Shibata, Yasuo
• Primary Examiner(s): Myhre, Charles J.
• Assistant Examiner(s): Heald, Randall
• Application Number:
  US05/100,965
• Time in Patent Office: 825 Days
• Field of Search: 74/512B 123/198R 180/82,103,105 200/61.9 340/53
• US Class Current: 123/198.00R
• CPC Class Codes: B60K 28/00 Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions for electrically-propelled vehicles B60L3/00; road vehicle drive control systems for purposes not related to the control of a particular sub-unit B60W30/00; drive control systems specially adapted for autonomous road vehicles B60W60/00
• CPC Class Codes: F01L 1/00 Valve-gear or valve arrangements, e.g. lift-valve gear lift-valve and valve-seat assemblies per se F01L3/00; slide-valve gear F01L5/00; actuated non-mechanically F01L9/00; valve arrangements in working piston or piston rod F01L11/00; modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations F01L13/00
• CPC Class Codes: F01L 2710/006 Safety devices therefor
• CPC Class Codes: G05G 1/30 Controlling members actuated by foot
• CPC Class Codes: Y10T 74/20528 Foot operated

Abstract

An apparatus for forcibly closing a throttle valve in a suction passage of an internal combustion engine, the throttle valve being movable to open and close by an acceleration operation member such as an acceleration pedal or the like. The apparatus for forcibly closing the throttle valve is mounted on one side of the throttle valve, and is operated when the throttle valve is not closed and the acceleration operation member is released from operation. The apparatus for forcibly closing the throttle valve comprises an electromagnetic solenoid with a core which is advanced with rotation when the solenoid is energized, there being a first detecting switch which is closed when the acceleration operation member is released from operation and a second detecting switch which is closed when the throttle valve is in its open position, the two switches being interposed in series in an electrical circuit containing the solenoid and an electric source.

Claims

1. For a throttle valve in a suction passage of an internal combustion engine wherein the throttle valve is opened by the operation of an acceleration operation member and is closed when the acceleration operation member is released, an improvement comprising first means for forcibly closing said throttle valve, and second means including detecting means to detect when the acceleration operation member is released and the throttle valve remains opened, and means coupling the first and second means to effect operation of the first means when the second means detects release of the acceleration operation member and an open throttle valve.

2. An improvement as claimed in claim 1 wherein said first means comprises a displaceable and turnable member having an inoperative position and being displaceable to an operative position with rotation to close the throttle valve, and an electromagnet acting on said displaceable and turnable member upon activation of said second means.

3. An improvement as claimed in claim 2 wherein said second means comprises an electrical circuit containing said electromagnet, an electrical power source therefor, a first switch means which is closed when the throttle valve is open, and a second switch means in series with the first switch means and being closed when the acceleration operation member is released.

4. An improvement as claimed in claim 3 comprising a rotatable shaft supporting said throttle valve, a disc fixedly mounted on said shaft, a pulley loosely mounted for rotation on said disc and coupled to the acceleration operation member for being rotated on said disc by the operation of said acceleration operation member, and a lost motion mechanism coupling said pulley and disc.

5. An improvement as claimed in claim 4 wherein said lost motion mechanism comprises a spring having one end fixedly connected to the disc and means connected to the other end of the spring and supported for relative travel in a slot provided in said pulley.

6. An improvement as claimed in claim 4 wherein said displaceable and turnable member is a second disc facing the first disc and in spaced relation therewith when said first means is inoperative, said discs being coupled in rotation when the first means is operated.

7. An improvement as claimed in claim 6 comprising teeth on said discs engageable with one another when the discs are coupled in rotation.

8. An improvement as claimed in claim 6 wherein said electromagnet comprises a displaceable core connected to the second disc, said core having a helical slot therein, and a fixed Pin engaged in said slot to produce turning of the second disc as the core is displaced.

9. An improvement as claimed in claim 6 comprising a return spring acting on said pulley to return the same to an initial position after the acceleration operation member is released.