US3805760A - Run-on prevention device for internal combustion engines - Google Patents

Run-on prevention device for internal combustion engines Download PDF

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Publication number
US3805760A
US3805760A US00309745A US30974572A US3805760A US 3805760 A US3805760 A US 3805760A US 00309745 A US00309745 A US 00309745A US 30974572 A US30974572 A US 30974572A US 3805760 A US3805760 A US 3805760A
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Prior art keywords
throttle valve
valve
control chamber
lever
solenoid
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Expired - Lifetime
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US00309745A
Inventor
S Yagi
M Atsumi
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Publication date
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to US00309745A priority Critical patent/US3805760A/en
Priority to JP47123411A priority patent/JPS5012542B2/ja
Priority to AR251164A priority patent/AR207321A1/en
Priority to BR9262/73A priority patent/BR7309262D0/en
Priority to FR7341959A priority patent/FR2208054B1/fr
Priority to CH1659273A priority patent/CH567658A5/xx
Priority to SU731976201A priority patent/SU735186A3/en
Priority to CS738123A priority patent/CS198131B2/en
Priority to IT53912/73A priority patent/IT997645B/en
Priority to CA186,675A priority patent/CA975637A/en
Priority to DE2358791A priority patent/DE2358791C3/en
Priority to GB5468973A priority patent/GB1452075A/en
Priority to DD174884A priority patent/DD109418A5/xx
Priority to ES420857A priority patent/ES420857A1/en
Priority to NL7316137A priority patent/NL7316137A/xx
Priority to BE138153A priority patent/BE807788A/en
Priority to SE7315990A priority patent/SE403507B/en
Application granted granted Critical
Publication of US3805760A publication Critical patent/US3805760A/en
Priority to US05/631,657 priority patent/USRE30844E/en
Priority to AU61377/73A priority patent/AU487252B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M19/00—Details, component parts, or accessories of carburettors, not provided for in, or of interest apart from, the apparatus of groups F02M1/00 - F02M17/00
    • F02M19/12—External control gear, e.g. having dash-pots
    • F02M19/122—Damping elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M3/00—Idling devices for carburettors
    • F02M3/02—Preventing flow of idling fuel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S123/00—Internal-combustion engines
    • Y10S123/11—Antidieseling

Definitions

  • the present invention is directed to a run-on preventing device which is particularly directed to use in conjunction with the internal combustion engines utilizing features of the aforementioned patent applications;
  • FIG. 3 is a diagrammatic view showing the electrical relationship between the solenoids shown in FIGS. 1 and 2 and an ignition switch.
  • FIG. 1 a portion of an air inlet duct 1 downstream from the venturi passage is shown.
  • a throttle valve 2 is mounted therein and is shown in its closed position.
  • Attached to the throttle valve by means of a stem protruding from the duct 1 is a control lever 3.
  • the control lever is shown as comprising opposing arms 4 and 5, the arm 4 being connected to a line 6 actuated by an accelerator pedal (not shown), and also connected to an op posing spring 7. The spring urges the throttle valve toward its closed position.
  • a control unit 8 or pneumatic dampener which includes a housing 9 having a stud 10 or other mounting means to place the housing at one side of the air duct 1.
  • the housing is provided with a diaphragm ll dividing the housing into a vented chamber 12 and a control chamber 13.
  • An operating pin 14 extends from the diaphragm through the vented chamber 12 into engagement with the arm 5 of the control lever 3 when the throttle valve 2 is within a predetermined proximity to its closed position.
  • a spring 15 within the control chamber 13 urges the pin 14 toward the control lever.
  • Air is permitted to enter or leave the control chamber through several devices.
  • One of the devices includes a venting passage 16 having a restriction 17 and capped by a filter 18.
  • Another includes a passage 19 having a check valve 20 backed by a spring 21v to permit entrance of air to the passage 19, but to close the passage against exhaust of air therethrough.
  • the inlet to the passage is capped by a filter 22
  • the third device includes a passage 23 having a valve 24 backed by a spring 25.
  • the valve 24 is connected to an armature 26 received in a solenoid 27. The relationship of the armature, solenoid and valve'is such that when the solenoid is deenergized, the port 28 communicates with the control chamber 13, and when the so-. lenoid is energized, thecommunication is cut off and when the solenoid is energized, the port is closed.
  • FIG. 2 indicates fragmentarily a mounting block 29 having a rick mixture supply duct 30.
  • the supply duct 30 is provided with a throttle valve 31 and appropriate fuel supply ports 32 and 33 communicating between a fuel passage 34 and the duct 30.
  • a spring 38 normally closes the valve 35 whereas the solenoid when energized opens the valve.
  • the solenoids 27 and 37 are connected in parallel with an ignition switch 39 so that the two solenoids are energized when the switch -is closed and deenergized when the switch is open.
  • the run-on prevention means is particularly adapted for use in connection with the engine disclosed in the co-pending application, Ser. No. 291,254, and in conjunction. with the carburetor. disclosed in Ser. No. 309,744, but may be adapted to other engines and their carburetors should a runon condition exist.
  • a main fuel supply is introduced principally in the region of a venturi passage which is upstream from the portion of the duct 1 shown in FIG. 1, and also fuel may be introduced at the edge of the throttle valve 2.
  • the resulting fuel air mixture is introduced into the respective cylinders of the engine.
  • an enriched fuel mixture is established in the duct 30 by the introduction of fuel through the ports 32 and .33.
  • the enriched mixture is introduced into each engine cylinder through a special prechamber device.
  • the enriched mixture and the leaner mixture are intermixed in the main combustion chamber of each engine cylinder.
  • the existence of the prechamber device may create a run-on action which will persist for a short period after the ignition key is turned off.
  • Operation of the run-on preventer shown in FIG. 1 is as follows: During normal operation, the ignition switch is closed causing the solenoid 27 to hold the valve 24 in its closed or broken line position shown in FIG. 1 so that the only openings available to the control chamber 13 are those provided by the passages 16 and 19. When the engine is in idling condition or near idling condition, the throttle valve is only partially open and the pin 14 is held in contact with the arm 5 of the control lever by means of the spring 15. If the throttle valve is opened causing the control chamber 13 to expand, air
  • Run-on prevention is attained when the ignition switch 39 is turned off.
  • the ignition switch 39 In practice, when one is about to shut off the engine by turning off the ignition key, he first removes his foot from the accelerator pedal permitting the spring 7 to close the throttle valve. If the restricted venting passage 16 were the only means of air discharge from the control chamber 13 a delay would occur before final closure would be obtained. During this interval fuel would continue to go to the engine cylinders, and be ignited by any hot spot in a combustion chamber, thus causing the engine to continue to run. This is prevented by the solenoid 27 which, when deenergized, permits the spring 25 to open the valve 24 for free ingress and egress of air to and from the control chamber 13 so that actual closing of the throttle valve 2 is virtually instantaneous.
  • a run-on preventing device for a fuel component duct of an internal combustion engine having a throttle valve, a lever arm for controlling movement of the throttle valve, a throttle control line for opening the throttle valve, and a closing spring opposing the throttle control line to close the throttle valve
  • the runon preventing device comprising: a housing means; a diaphragm dividing the housing means into a vented chamber and a control chamber; a pin extending between the diaphragm and the lever arm; a spring backing the diaphragm for maintaining the pin in contact with the lever arm; a restricted outlet from the control chamber tending to delay closing of the throttle valve in response to the closing spring; a check valve to admit air to the control chamber when the control chamber expands; a bleed valve; a spring normally holding the.
  • bleed valve in its open position exposing the control chamber to atmospheric pressure; a solenoid control operable, when energized, to hold the bleed valve in its closed position, and operable, when de-energized, to permit the bleed valve spring to open the bleed valve; and an ignition switch having a closed position energizing the solenoid control to close the bleed valve in an off position de-energizing the solenoid control to open the bleed valve thereby to free the diaphragm for movement with the throttle valve to effect immediate closure in response to the closure spring.
  • a dampener device for impeding closing movement of the throttle valve said dampener device including a housing having a control chamber provided with a movable wall, means connected to the movable wall and positioned for actuation by said lever to impede movement of the lever in a direction corresponding to closing movement of the throttle valve, impeding of such movement being accomplished by change of pressure in the control chamber caused by movement of said movable, wall, means providing a restricted passage connecting said control chamber to atmosphere, resilient means acting on said movable wall in a direction opposing closing movement of the throttle valve, a solenoid-operated valve for-connecting the control chamber to atmosphere, and means for connecting the solenoid valve for actuation of the engine ignition switch whereby opening the ignition switch serves to connect the control chamber to atmosphere
  • a dampener device having means operated by said lever for impeding closing movement of the throttle valve, said dampener device having a control chamber of variable volume, means providing'a restricted passage connecting said valve for connecting the control chamber to atmosphere, and means for connecting the solenoid valve for actuation by the engine ignition switch whereby opening the ignition switch serves to connect the control chamber to atmosphere to disable the dampener device.
  • a pneumatic dampener device having means operated by said lever for impeding closing movement of the throttle valve, said pneumatic dampener device having a control chamber of variable volume, a solenoid-operated valve for connecting the control chamber to atmosphere, and means for connecting the solenoid valve for actuation by the 6 engine ignition switch whereby opening the ignition switch serves to connect the control chamber to atmosphere to disable the dampener device.
  • the improve ment comprising, in combination: a pneumatic dampener device having means operated by said lever for impeding closing movement of the throttle valve, said pneumatic dampener device having a control chamber of variable volume, electric means for venting the control chamber to atmosphere, and means for connecting said electric means for actuation by the engine ignition switch whereby opening the ignition switch serves to disable the dampener device.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

A device which prevents run-on or continued operation of an internal combustion engine when the ignition is shut off; the device including means for preventing delayed closing of the throttle valve or valves when the ignition circuit is opened.

Description

[ 1 Apr. 23, 1974 United States Patent 1191 Yagi et al.
[ RUN-ON PREVENTION DEVICE FOR Wa1ker..... 123/198 DC 123/198 DB 123/198 DC X l23/D1G. 11 X- INTERNAL COMBUSTION ENGINES Sim0net..,.
1 7/1972 Soubis..........
l/l970 Burnia.................... 5/1973 [75] Inventors: Shizuo Yagi, Asaka; Minoru Atsumi,
Kawagoe, both of Japan Assignee: Honda Giken Kogyo Kabushiki 123/103 R 123/97 B X L a I e e Kaisha, Tokyo, Japan Nov. 27, 1972 123/97 B x 123/198 1313 23/010; 11 x 8/1973 Charron et a1.
[22] Filed:
8/1973 Charron et a1..
8/1973 Cedar..............
[2]] Appl. N0.: 309,745
Primary Examiner-Al Lawrence Smith [52] US. Cl... 123/198 DB, 123/D1G. 11, 123/97 B,
123/103 R 123/119 R Attorney, Agent, or Fzrm Lyon and Lyon F02m 9/12, F02m 3/02, F02m 1/14 Field of Search ABSTRACT [51] Int. Cl.
1'23/DIG. 11, 198 D, 198 DB,
A device which prevents run-on or continued operation of an internal combustion engine when the ignition is shut off; the device including means for preventing delayed closing of the throttle valve or valves when the ignition circuit is opened.
9 Claims, 3 Drawing Figures 9 1 l l .B. R pm 3 wm 13 m wn E E 3 N m 0 E n 1 d B mmm 7 0 m 9 S t. s %E "w 8 CT fm 0 n n 1. e TT1 1 T fl e 0O RSHMG 9 8D c, nn D m9 8 9 U U H 3 002 n 48 1 6 1 5 33 1 RUN-ON PREVENTION DEVICE FOR INTERNAL COMBUSTION ENGINES Internal combustion engines of the spark ignition type may continue to operate after the ignition is turned off. This condition is known as run-on. This is due to the presence of a hot spot existing in the combustion chamber of sufficient intensity to ignite the fuel mixture even though the electrical ignition through the spark plug is not activated.
Reference is directed to the following copending applications Yagi et al., filed Nov. 27, 1972, Ser. No. 309,744, for CARBURETOR; and Date et al., filed Sept. 22, I972, Ser. No. 2 9 l l254, entitled Reduction of N04,, BC and CO in the Exhaust Gases of Internal Combustion Engines.
The present invention is directed to a run-on preventing device which is particularly directed to use in conjunction with the internal combustion engines utilizing features of the aforementioned patent applications;
however, the present invention is not limited to such use. The present invention is summarized in the following objects:
First, to provide an anti-run-on device which insures complete shut-off of fuel supply simultaneous with opening of the ignition circuit withoutinterfering with the normal'function of other devices designed to control operation of an internal combustion engine so as to minimize unwanted emissions.
Second, to provide an anti-run-on device which utilizes a solenoid controlled valve operable in conjunction with a dash pot device to cause instant closure of the throttle valve when the ignition switch is opened.
Third, to provide an anti-run-on device which may be employed in internal combustion engine control systems having more than one fuel supply means, which device effects instant closure of all fuel supply means.
DESCRIPTION OF THE FIGURES showing a. portion of the carburetor disclosed in the aforementioned co-pending application, Ser. No.
309,744 and including a solenoid controlled shutoff valve.
FIG. 3 is a diagrammatic view showing the electrical relationship between the solenoids shown in FIGS. 1 and 2 and an ignition switch.
Referring first to FIG. 1, a portion of an air inlet duct 1 downstream from the venturi passage is shown. A throttle valve 2 is mounted therein and is shown in its closed position. Attached to the throttle valve by means of a stem protruding from the duct 1 is a control lever 3. For the purposes of illustration, the control lever is shown as comprising opposing arms 4 and 5, the arm 4 being connected to a line 6 actuated by an accelerator pedal (not shown), and also connected to an op posing spring 7. The spring urges the throttle valve toward its closed position.
Mounted at one side of the air duct is a control unit 8 or pneumatic dampener which includes a housing 9 having a stud 10 or other mounting means to place the housing at one side of the air duct 1. The housing is provided with a diaphragm ll dividing the housing into a vented chamber 12 and a control chamber 13. An operating pin 14 extends from the diaphragm through the vented chamber 12 into engagement with the arm 5 of the control lever 3 when the throttle valve 2 is within a predetermined proximity to its closed position. A spring 15 within the control chamber 13 urges the pin 14 toward the control lever.
Air is permitted to enter or leave the control chamber through several devices. One of the devices includes a venting passage 16 having a restriction 17 and capped by a filter 18. Another includes a passage 19 having a check valve 20 backed by a spring 21v to permit entrance of air to the passage 19, but to close the passage against exhaust of air therethrough. The inlet to the passage is capped by a filter 22 The third device includes a passage 23 having a valve 24 backed by a spring 25. The valve 24 is connected to an armature 26 received in a solenoid 27. The relationship of the armature, solenoid and valve'is such that when the solenoid is deenergized, the port 28 communicates with the control chamber 13, and when the so-. lenoid is energized, thecommunication is cut off and when the solenoid is energized, the port is closed.
Reference is now directed to FIG. 2, which indicates fragmentarily a mounting block 29 having a rick mixture supply duct 30. This construction is part of the carburetor more fully disclosed in the aforementioned copending application, Ser. No. 309,744. The supply duct 30 is provided with a throttle valve 31 and appropriate fuel supply ports 32 and 33 communicating between a fuel passage 34 and the duct 30. Interposed in the passage 74 is a valve 35-connected to an armature 36 of a solenoid 37. A spring 38 normally closes the valve 35 whereas the solenoid when energized opens the valve.
' As indicated in FIG. 3, the solenoids 27 and 37 are connected in parallel with an ignition switch 39 so that the two solenoids are energized when the switch -is closed and deenergized when the switch is open.
The run-on prevention means is particularly adapted for use in connection with the engine disclosed in the co-pending application, Ser. No. 291,254, and in conjunction. with the carburetor. disclosed in Ser. No. 309,744, but may be adapted to other engines and their carburetors should a runon condition exist. As more fully disclosed in the co'pending applications, a main fuel supply is introduced principally in the region of a venturi passage which is upstream from the portion of the duct 1 shown in FIG. 1, and also fuel may be introduced at the edge of the throttle valve 2. The resulting fuel air mixture is introduced into the respective cylinders of the engine. Also as disclosed in the copending applications, an enriched fuel mixture is established in the duct 30 by the introduction of fuel through the ports 32 and .33. The enriched mixture is introduced into each engine cylinder through a special prechamber device. The enriched mixture and the leaner mixture are intermixed in the main combustion chamber of each engine cylinder. The existence of the prechamber device may create a run-on action which will persist for a short period after the ignition key is turned off.
Operation of the run-on preventer shown in FIG. 1 is as follows: During normal operation, the ignition switch is closed causing the solenoid 27 to hold the valve 24 in its closed or broken line position shown in FIG. 1 so that the only openings available to the control chamber 13 are those provided by the passages 16 and 19. When the engine is in idling condition or near idling condition, the throttle valve is only partially open and the pin 14 is held in contact with the arm 5 of the control lever by means of the spring 15. If the throttle valve is opened causing the control chamber 13 to expand, air
is permitted to enter relatively freely through the check valve 20. When the throttle valve moves toward its closed position causing the arm 5 to press against the pin 14 overcoming the spring 15, the rate of movement is dampened by the restriction 17 in the venting passage 16. The purpose of this is to provide a slight delay in the final closing movement of the throttle valve and to improve the quality of the engine exhaust emissions. As disclosed in the co pending applications, additional means are provided for this purpose and are also connected to the throttle valve. However, these further refinements which do not relate to run-on prevention are omitted to simplify the illustration.
Run-on prevention is attained when the ignition switch 39 is turned off. In practice, when one is about to shut off the engine by turning off the ignition key, he first removes his foot from the accelerator pedal permitting the spring 7 to close the throttle valve. If the restricted venting passage 16 were the only means of air discharge from the control chamber 13 a delay would occur before final closure would be obtained. During this interval fuel would continue to go to the engine cylinders, and be ignited by any hot spot in a combustion chamber, thus causing the engine to continue to run. This is prevented by the solenoid 27 which, when deenergized, permits the spring 25 to open the valve 24 for free ingress and egress of air to and from the control chamber 13 so that actual closing of the throttle valve 2 is virtually instantaneous.
Referring to FIG. 2, if air-fuel mixture is permitted to enter the cylinders through the duct 30, a run-on condition will tend to occur. During operation of the engine, the solenoid 37 holds the valve 35 open permitting the flow of fuel to the duct 30. When the ignition is turned off the solenoid 37 is deenergized permitting the spring 38 to shut off the supply of fuel to the duct 30. As a result, this source of run-on is instantly closed when the ignition switch is turned off.
We claim: 7 I
1. A run-on preventing device for a fuel component duct of an internal combustion engine, the duct having a throttle valve, a lever arm for controlling movement of the throttle valve, a throttle control line for opening the throttle valve, and a closing spring opposing the throttle control line to close the throttle valve, the runon preventing device comprising: a housing means; a diaphragm dividing the housing means into a vented chamber and a control chamber; a pin extending between the diaphragm and the lever arm; a spring backing the diaphragm for maintaining the pin in contact with the lever arm; a restricted outlet from the control chamber tending to delay closing of the throttle valve in response to the closing spring; a check valve to admit air to the control chamber when the control chamber expands; a bleed valve; a spring normally holding the.
bleed valve in its open position exposing the control chamber to atmospheric pressure; a solenoid control operable, when energized, to hold the bleed valve in its closed position, and operable, when de-energized, to permit the bleed valve spring to open the bleed valve; and an ignition switch having a closed position energizing the solenoid control to close the bleed valve in an off position de-energizing the solenoid control to open the bleed valve thereby to free the diaphragm for movement with the throttle valve to effect immediate closure in response to the closure spring.
2. A run-on preventing device as defined in claim 1, for an internal combustion engine having a fuel supply means, wherein: a normally closed valve means is provided for the fuel supply means; a solenoid actuator operable, when energized, to open the valve means, the solenoid actuator being connected with the ignition switch in parallel with the solenoid actuator to permit supply of fuel when the ignition switch is closed and to shut off the fuel supply when the ignition switch is opened.
3. For use with an internal combustion spark-ignition engine having an intake passage containing a throttle valve, a lever for operating the throttle valve, an actuator connected to the lever for opening the throttle valve and a spring for closing the throttle valve, the improve ment comprising, in combination: a dampener device for impeding closing movement of the throttle valve, said dampener device including a housing having a control chamber provided with a movable wall, means connected to the movable wall and positioned for actuation by said lever to impede movement of the lever in a direction corresponding to closing movement of the throttle valve, impeding of such movement being accomplished by change of pressure in the control chamber caused by movement of said movable, wall, means providing a restricted passage connecting said control chamber to atmosphere, resilient means acting on said movable wall in a direction opposing closing movement of the throttle valve, a solenoid-operated valve for-connecting the control chamber to atmosphere, and means for connecting the solenoid valve for actuation of the engine ignition switch whereby opening the ignition switch serves to connect the control chamber to atmosphere to permit rapid closing of the throttle valve.
4. The combination set forth in claim 3 in which the means connected to the movable wall comprises an axially movable pin positioned to engage said lever arm.
5. The combination set forth in claim 3 together with a fuel supply conduit for the engine, a solenoidactuation by the engine ignition switch.
6. The combination set forth in claim 3 in which said resilient means is positioned within said control chamber and wherein closing movement of the throttle valve acts to increase pressure in said control chamber.
7. For use with an internal combustion spark-ignition engine having an intake passage containing a throttle valve, a lever for operating said throttle valve, an actuator connected to the lever-for opening. the throttle valve and a spring for closing the throttle valve, the improvement comprising, in combination: a dampener device having means operated by said lever for impeding closing movement of the throttle valve, said dampener device having a control chamber of variable volume, means providing'a restricted passage connecting said valve for connecting the control chamber to atmosphere, and means for connecting the solenoid valve for actuation by the engine ignition switch whereby opening the ignition switch serves to connect the control chamber to atmosphere to disable the dampener device.
' 8. For use with an internal combustion spark-ignition engine having an intake passage containing a throttle valve, a lever for operating said throttle valve, an actuator connected to the lever for opening the throttle valve and a spring for closing the throttle valve, the improvement comprising, in combination: a pneumatic dampener device having means operated by said lever for impeding closing movement of the throttle valve, said pneumatic dampener device having a control chamber of variable volume, a solenoid-operated valve for connecting the control chamber to atmosphere, and means for connecting the solenoid valve for actuation by the 6 engine ignition switch whereby opening the ignition switch serves to connect the control chamber to atmosphere to disable the dampener device.
9. For use with an internal combustion spark-ignition engine having an intake passage containing a throttle valve, a lever for operating said throttle valve, an actuator connected to the lever for opening the throttle valve and a spring for closing the throttle valve, the improve ment comprising, in combination: a pneumatic dampener device having means operated by said lever for impeding closing movement of the throttle valve, said pneumatic dampener device having a control chamber of variable volume, electric means for venting the control chamber to atmosphere, and means for connecting said electric means for actuation by the engine ignition switch whereby opening the ignition switch serves to disable the dampener device.

Claims (9)

1. A run-on preventing device for a fuel component duct of an internal combustion engine, the duct having a throttle valve, a lever arm for controlling movement of the throttle valve, a throttle control line for opening the throttle valve, and a closing spring opposing the throttle control line to close the throttle valve, the run-on preventing device comprising: a housing means; a diaphragm dividing the housing means into a vented chamber and a control chamber; a pin extending between the diaphragm and the lever arm; a spring backing the diaphragm for maintaining the pin in contact with the lever arm; a restricted outlet from the control chamber tending to delay closing of the throttle valve in response to the closing spring; a check valve to admit air to the control chamber when the control chamber expands; a bleed valve; a spring normally holding the bleed valve in its open position exposing the control chamber to atmospheric pressure; a solenoid control operable, when energized, to hold the bleed valve in its closed position, and operable, when deenergized, to permit the bleed valve spring to open the bleed valve; and an ignition switch having a closed position energizing the solenoid control to close the bleed valve in an off position de-energizing the solenoid control to open the bleed valve thereby to fRee the diaphragm for movement with the throttle valve to effect immediate closure in response to the closure spring.
2. A run-on preventing device as defined in claim 1, for an internal combustion engine having a fuel supply means, wherein: a normally closed valve means is provided for the fuel supply means; a solenoid actuator operable, when energized, to open the valve means, the solenoid actuator being connected with the ignition switch in parallel with the solenoid actuator to permit supply of fuel when the ignition switch is closed and to shut off the fuel supply when the ignition switch is opened.
3. For use with an internal combustion spark-ignition engine having an intake passage containing a throttle valve, a lever for operating the throttle valve, an actuator connected to the lever for opening the throttle valve and a spring for closing the throttle valve, the improvement comprising, in combination: a dampener device for impeding closing movement of the throttle valve, said dampener device including a housing having a control chamber provided with a movable wall, means connected to the movable wall and positioned for actuation by said lever to impede movement of the lever in a direction corresponding to closing movement of the throttle valve, impeding of such movement being accomplished by change of pressure in the control chamber caused by movement of said movable wall, means providing a restricted passage connecting said control chamber to atmosphere, resilient means acting on said movable wall in a direction opposing closing movement of the throttle valve, a solenoid-operated valve for connecting the control chamber to atmosphere, and means for connecting the solenoid valve for actuation of the engine ignition switch whereby opening the ignition switch serves to connect the control chamber to atmosphere to permit rapid closing of the throttle valve.
4. The combination set forth in claim 3 in which the means connected to the movable wall comprises an axially movable pin positioned to engage said lever arm.
5. The combination set forth in claim 3 together with a fuel supply conduit for the engine, a solenoid-operated valve for closing said conduit, and means for connecting the latter said solenoid-operated valve for actuation by the engine ignition switch.
6. The combination set forth in claim 3 in which said resilient means is positioned within said control chamber and wherein closing movement of the throttle valve acts to increase pressure in said control chamber.
7. For use with an internal combustion spark-ignition engine having an intake passage containing a throttle valve, a lever for operating said throttle valve, an actuator connected to the lever for opening the throttle valve and a spring for closing the throttle valve, the improvement comprising, in combination: a dampener device having means operated by said lever for impeding closing movement of the throttle valve, said dampener device having a control chamber of variable volume, means providing a restricted passage connecting said control chamber to atmosphere, a solenoid-operated valve for connecting the control chamber to atmosphere, and means for connecting the solenoid valve for actuation by the engine ignition switch whereby opening the ignition switch serves to connect the control chamber to atmosphere to disable the dampener device.
8. For use with an internal combustion spark-ignition engine having an intake passage containing a throttle valve, a lever for operating said throttle valve, an actuator connected to the lever for opening the throttle valve and a spring for closing the throttle valve, the improvement comprising, in combination: a pneumatic dampener device having means operated by said lever for impeding closing movement of the throttle valve, said pneumatic dampener device having a control chamber of variable volume, a solenoid-operated valve for connecting the control chamber to atmosphere, and means for connecting the solenoid valve for actuation by the engine igniTion switch whereby opening the ignition switch serves to connect the control chamber to atmosphere to disable the dampener device.
9. For use with an internal combustion spark-ignition engine having an intake passage containing a throttle valve, a lever for operating said throttle valve, an actuator connected to the lever for opening the throttle valve and a spring for closing the throttle valve, the improvement comprising, in combination: a pneumatic dampener device having means operated by said lever for impeding closing movement of the throttle valve, said pneumatic dampener device having a control chamber of variable volume, electric means for venting the control chamber to atmosphere, and means for connecting said electric means for actuation by the engine ignition switch whereby opening the ignition switch serves to disable the dampener device.
US00309745A 1972-11-27 1972-11-27 Run-on prevention device for internal combustion engines Expired - Lifetime US3805760A (en)

Priority Applications (19)

Application Number Priority Date Filing Date Title
US00309745A US3805760A (en) 1972-11-27 1972-11-27 Run-on prevention device for internal combustion engines
JP47123411A JPS5012542B2 (en) 1972-11-27 1972-12-11
AR251164A AR207321A1 (en) 1972-11-27 1973-01-01 OVERDRIVE PREVENTION DEVICE FOR INTERNAL COMBUSTION ENGINES
DD174884A DD109418A5 (en) 1972-11-27 1973-11-26
CH1659273A CH567658A5 (en) 1972-11-27 1973-11-26
SU731976201A SU735186A3 (en) 1972-11-27 1973-11-26 Throttling valve control device
CS738123A CS198131B2 (en) 1972-11-27 1973-11-26 Carburetter for the combustion motor
IT53912/73A IT997645B (en) 1972-11-27 1973-11-26 PNEUMATIC DAMPING DEVICE FOR INTERNAL COMBUSTION ENGINES
CA186,675A CA975637A (en) 1972-11-27 1973-11-26 Run-on prevention device for internal combustion engines
DE2358791A DE2358791C3 (en) 1972-11-27 1973-11-26 Controllable sleep damper for the main throttle valve of a carburetor for internal combustion engines
BR9262/73A BR7309262D0 (en) 1972-11-27 1973-11-26 IMPROVEMENTS IN DEVICE TO AVOID CONTINUATION OF MOVEMENT TO A FUEL DUCT FOR AN INTERNAL COMBUSTION MACHINE OR ENGINE
FR7341959A FR2208054B1 (en) 1972-11-27 1973-11-26
ES420857A ES420857A1 (en) 1972-11-27 1973-11-26 Run-on prevention device for internal combustion engines
NL7316137A NL7316137A (en) 1972-11-27 1973-11-26
BE138153A BE807788A (en) 1972-11-27 1973-11-26 PNEUMATIC SHOCK ABSORBERS
SE7315990A SE403507B (en) 1972-11-27 1973-11-26 COMBUSTION ENGINE DEVICE
GB5468973A GB1452075A (en) 1972-11-27 1973-11-26 Internal combustion engines
US05/631,657 USRE30844E (en) 1972-11-27 1975-11-13 Run-on prevention device for internal combustion engines
AU61377/73A AU487252B2 (en) 1972-11-27 1977-10-15 Run-on prevention device for internal combustion engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00309745A US3805760A (en) 1972-11-27 1972-11-27 Run-on prevention device for internal combustion engines

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/631,657 Reissue USRE30844E (en) 1972-11-27 1975-11-13 Run-on prevention device for internal combustion engines

Publications (1)

Publication Number Publication Date
US3805760A true US3805760A (en) 1974-04-23

Family

ID=23199500

Family Applications (1)

Application Number Title Priority Date Filing Date
US00309745A Expired - Lifetime US3805760A (en) 1972-11-27 1972-11-27 Run-on prevention device for internal combustion engines

Country Status (17)

Country Link
US (1) US3805760A (en)
JP (1) JPS5012542B2 (en)
AR (1) AR207321A1 (en)
BE (1) BE807788A (en)
BR (1) BR7309262D0 (en)
CA (1) CA975637A (en)
CH (1) CH567658A5 (en)
CS (1) CS198131B2 (en)
DD (1) DD109418A5 (en)
DE (1) DE2358791C3 (en)
ES (1) ES420857A1 (en)
FR (1) FR2208054B1 (en)
GB (1) GB1452075A (en)
IT (1) IT997645B (en)
NL (1) NL7316137A (en)
SE (1) SE403507B (en)
SU (1) SU735186A3 (en)

Cited By (13)

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Publication number Priority date Publication date Assignee Title
US3952719A (en) * 1975-03-28 1976-04-27 Borg-Warner Corporation Vacuum pulse actuated fuel control valve
US3971356A (en) * 1975-09-09 1976-07-27 Acf Industries, Incorporated Solenoid-dashpot
US4022179A (en) * 1975-12-29 1977-05-10 Acf Industries, Incorporated Vacuum controlled throttle positioner and dashpot
US4086900A (en) * 1976-07-19 1978-05-02 Colt Industries Operating Corporation Variable position throttle stop and dashpot apparatus
US4089307A (en) * 1975-02-10 1978-05-16 Nissan Motor Company, Limited Throttle valve operating mechanism
US4090481A (en) * 1975-11-29 1978-05-23 Volkswagenwerk Aktiengesellschaft Throttle closing mechanism for internal combustion engine
US4126303A (en) * 1975-05-16 1978-11-21 Hitachi, Ltd. Dashpot
US4136649A (en) * 1976-01-16 1979-01-30 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Dashpot
US4187817A (en) * 1978-10-05 1980-02-12 Cummins Engine Company, Inc. Apparatus and method for averting the effects of seal failure in an I.C. engine fuel supply system
US4210110A (en) * 1976-06-28 1980-07-01 Krebaum Gerald E Carburetor control device
US4569321A (en) * 1982-02-22 1986-02-11 Weber S.P.A. Carburetor for internal combustion engines with electronically controlled elements capable of maintaining the idling speed of the engine at a constant level
US9261030B2 (en) 2013-05-20 2016-02-16 Kohler Co. Automatic fuel shutoff
US10343692B2 (en) * 2016-09-09 2019-07-09 Hyundai Motor Company Method and apparatus for preventing dieseling of engine for mild hybrid electric vehicle

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5527517Y2 (en) * 1975-01-13 1980-07-01
DE2656538C2 (en) * 1976-12-14 1985-07-11 Audi AG, 8070 Ingolstadt Fuel injection system
JPS54154640U (en) * 1978-04-20 1979-10-27
JPS557945U (en) * 1978-07-03 1980-01-19
DE3331597A1 (en) * 1983-09-01 1985-03-21 Bayerische Motoren Werke AG, 8000 München DEVICE FOR REDUCING THE BRAKING TORQUE OF INTERNAL COMBUSTION ENGINES IN MOTOR VEHICLES
IT208323Z2 (en) * 1986-10-31 1988-05-28 Weber Srl BUTTERFLY ROTATION CONTROL DEVICE IN THE RELEASE PHASE FOR A FUEL AND AIR MIXTURE SUPPLY EQUIPMENT TO AN INTERNAL COMBUSTION ENGINE

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US3158144A (en) * 1964-11-24 Walker
US3354877A (en) * 1966-03-25 1967-11-28 Acf Ind Inc Means for preventing auto ignition at engine shut down
US3491737A (en) * 1968-03-22 1970-01-27 Ford Motor Co Throttle blade control mechanism for preventing engine dieseling
US3618581A (en) * 1968-09-05 1971-11-09 Zenith Carburateur Soc Du Carburetors for internal combustion engines
US3618582A (en) * 1969-12-04 1971-11-09 F & E Mfg Co Throttle control system
US3678911A (en) * 1969-07-16 1972-07-25 Chrysler France Switching-off device for internal combustion engine fed by a dual-body carburetor
US3682148A (en) * 1971-03-04 1972-08-08 Ford Motor Co Carburetor throttle valve positioner
US3730153A (en) * 1971-07-06 1973-05-01 Ford Motor Co Carburetor throttle valve positioner
US3744470A (en) * 1971-11-29 1973-07-10 Ford Motor Co Engine anti-diesel control
US3744471A (en) * 1971-11-29 1973-07-10 Ford Motor Co Carburetor emission control
US3752450A (en) * 1971-07-26 1973-08-14 Ford Motor Co Vacuum controlled carburetor throttle valve positioner
US3752141A (en) * 1972-08-07 1973-08-14 Ford Motor Co Vacuum controlled carburetor throttle valve positioner
US3753427A (en) * 1971-11-29 1973-08-21 Ford Motor Co Engine anti-diesel and deceleration control

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US2692651A (en) * 1951-03-14 1954-10-26 Chrysler Corp Dashpot control for vehicle engine throttle valves

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3158144A (en) * 1964-11-24 Walker
US3354877A (en) * 1966-03-25 1967-11-28 Acf Ind Inc Means for preventing auto ignition at engine shut down
US3491737A (en) * 1968-03-22 1970-01-27 Ford Motor Co Throttle blade control mechanism for preventing engine dieseling
US3618581A (en) * 1968-09-05 1971-11-09 Zenith Carburateur Soc Du Carburetors for internal combustion engines
US3678911A (en) * 1969-07-16 1972-07-25 Chrysler France Switching-off device for internal combustion engine fed by a dual-body carburetor
US3618582A (en) * 1969-12-04 1971-11-09 F & E Mfg Co Throttle control system
US3682148A (en) * 1971-03-04 1972-08-08 Ford Motor Co Carburetor throttle valve positioner
US3730153A (en) * 1971-07-06 1973-05-01 Ford Motor Co Carburetor throttle valve positioner
US3752450A (en) * 1971-07-26 1973-08-14 Ford Motor Co Vacuum controlled carburetor throttle valve positioner
US3744470A (en) * 1971-11-29 1973-07-10 Ford Motor Co Engine anti-diesel control
US3744471A (en) * 1971-11-29 1973-07-10 Ford Motor Co Carburetor emission control
US3753427A (en) * 1971-11-29 1973-08-21 Ford Motor Co Engine anti-diesel and deceleration control
US3752141A (en) * 1972-08-07 1973-08-14 Ford Motor Co Vacuum controlled carburetor throttle valve positioner

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4089307A (en) * 1975-02-10 1978-05-16 Nissan Motor Company, Limited Throttle valve operating mechanism
US3952719A (en) * 1975-03-28 1976-04-27 Borg-Warner Corporation Vacuum pulse actuated fuel control valve
US4126303A (en) * 1975-05-16 1978-11-21 Hitachi, Ltd. Dashpot
US3971356A (en) * 1975-09-09 1976-07-27 Acf Industries, Incorporated Solenoid-dashpot
US4090481A (en) * 1975-11-29 1978-05-23 Volkswagenwerk Aktiengesellschaft Throttle closing mechanism for internal combustion engine
US4022179A (en) * 1975-12-29 1977-05-10 Acf Industries, Incorporated Vacuum controlled throttle positioner and dashpot
US4136649A (en) * 1976-01-16 1979-01-30 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Dashpot
US4210110A (en) * 1976-06-28 1980-07-01 Krebaum Gerald E Carburetor control device
US4086900A (en) * 1976-07-19 1978-05-02 Colt Industries Operating Corporation Variable position throttle stop and dashpot apparatus
US4187817A (en) * 1978-10-05 1980-02-12 Cummins Engine Company, Inc. Apparatus and method for averting the effects of seal failure in an I.C. engine fuel supply system
US4569321A (en) * 1982-02-22 1986-02-11 Weber S.P.A. Carburetor for internal combustion engines with electronically controlled elements capable of maintaining the idling speed of the engine at a constant level
US9261030B2 (en) 2013-05-20 2016-02-16 Kohler Co. Automatic fuel shutoff
US9739214B2 (en) 2013-05-20 2017-08-22 Kohler, Co. Automatic fuel shutoff
US10343692B2 (en) * 2016-09-09 2019-07-09 Hyundai Motor Company Method and apparatus for preventing dieseling of engine for mild hybrid electric vehicle

Also Published As

Publication number Publication date
CS198131B2 (en) 1980-05-30
JPS5012542B2 (en) 1975-05-13
ES420857A1 (en) 1976-09-01
SE403507B (en) 1978-08-21
DE2358791A1 (en) 1974-05-30
NL7316137A (en) 1974-05-29
BR7309262D0 (en) 1974-08-29
IT997645B (en) 1975-12-30
GB1452075A (en) 1976-10-06
AR207321A1 (en) 1976-09-30
DE2358791C3 (en) 1978-12-14
DE2358791B2 (en) 1978-04-20
CH567658A5 (en) 1975-10-15
BE807788A (en) 1974-05-27
FR2208054B1 (en) 1979-08-31
FR2208054A1 (en) 1974-06-21
AU6137773A (en) 1975-04-17
JPS49108434A (en) 1974-10-15
DD109418A5 (en) 1974-11-05
SU735186A3 (en) 1980-05-15
CA975637A (en) 1975-10-07

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