INSTALLATION IN INTERNAL COMBUSTION ENGINES FOR PREVENTING THE ESCAPE OF FUEL OUT OF THE MIXTURE FORMATION SYSTEM INTO THE ATMOSPHERE

• US 3,678,912 A
• Filed: 04/09/1970
• Issued: 07/25/1972
• Est. Priority Date: 04/11/1969
• Status: Expired due to Term

• Current Assignee: Paul Hensler
• Original Assignee: Paul Hensler
• Inventors: Hensler, Paul
• Primary Examiner(s): Smith, Al Lawrence
• Application Number:
  US05/026,863
• Time in Patent Office: 838 Days
• Field of Search: 123/126,119,119F,198D,122D 55/DIG.28,418,419,420,276
• US Class Current: 123/518
• CPC Class Codes: F02M 35/04 specially arranged with respect to engine , to intake system or specially adapted to vehicle; Mounting thereon ; Combinations with other devices combined with silencers F02M35/14
• CPC Class Codes: F02M 35/10013 Means upstream of the air filter; Connection to the ambient air
• CPC Class Codes: F02M 35/10255 Arrangements of valves; Multi-way valves F02M35/10032 takes precedence; valves in the plenum chamber F02M35/10065; check valves F02M35/10275
• CPC Class Codes: F02M 35/10275 Means to avoid a change in direction of incoming fluid, e.g. all intake ducts diverging from plenum chamber at acute angles; Check valves; Flame arrestors for backfire prevention
• CPC Class Codes: F02M 35/1038 for temperature or pressure
• CPC Class Codes: Y10S 55/28 Carburetor attached

Abstract

An installation for internal combustion engines to prevent the escape of fuel out of the mixture formation system into the atmosphere, in which combustion air is taken out of the atmosphere by way of a suction pipe with an air filter connected to its inlet and is enriched with fuel, prior to the entry into the combustion spaces, by means of a fuel-feed installation, whereby a closure valve is arranged on the inlet side of the air filter and is actuated by an adjusting device adapted to be automatically engaged in dependence on at least one operating condition of the internal combustion engine.

Claims

1. An installation in internal combustion engines for preventing the escape of fuel out of its mixture formation system into the atmosphere, in which combustion air is taken out of the atmosphere by way of a suction pipe means constituting the only air inlet path and an air filter meanS connected in the input thereof and is enriched with fuel prior to the entry into the combustion spaces by way of a fuel-feed means, characterized by a closure valve means on the side of the air inlet aperture of the air filter means, said closure valve means being in the closed position when the engine is shut down, and adjusting motor means for actuating the closure valve means, said adjusting means being automatically engaged by way of control means in dependence of at least one operating condition of the internal combustion engine.

2. An installation according to claim 1, characterized in that the internal combustion engine is provided with a carbureting mixture formation.

3. An installation in internal combustion engines for preventing the escape of fuel out of its mixture formation system into the atmosphere, in which combustion air is taken out of the atmosphere by way of a suction pipe means and an air filter means connected in the input thereof and is enriched with fuel prior to the entry into the combustion spaces by way of a fuel-feed means, characterized by a closure valve means on the side of the air inlet aperture of the air filter means, and adjusting means for actuating the closure valve means, said adjusting means being automatically engaged by way of control means in dependence of at least one operating condition of the internal combustion engine, the closure valve means being arranged in the suction connection of the air filter means and including a relief valve means.

4. An installation according to claim 3, characterized in that the closure valve means includes two support plates held from each other at a spacing and of sealing lamellae displaceably arranged between the support plates, the diameter of said lamellae being larger than the cross-section of the suction connection of the air filter means.

5. An installation according to claim 4, characterized in that the adjusting means for the closure valve means is formed by an adjusting motor constituted by an electric rotating armature magnet having an adjusting range of about 90*.

6. An installation according to claim 5, characterized in that said adjusting motor means has a permanent-magnet-type end position lock means.

7. An installation with a starter ignition switch according to claim 6, characterized in that a contact at the starter ignition switch and a time-delay relay connected behind said contact is provided in the energizing circuit for the rotating armature magnet of said adjusting means.

8. An installation with a starter ignition switch according to claim 6, characterized in that a Zener diode with predetermined breakdown voltage is provided in the energizing circuit from the starter ignition switch to the rotating armature magnet of said adjusting means, said breakdown voltage being produced by a means operable in proportion to the engine rotational speed.

9. An installation according to claim 6, characterized by vacuum sensor means inserted into the suction connection downstream of the closure valve means which closes the energizing circuit for energizing the adjusting means for the actuation of the closure valve means by way of a switch.

10. An installation according to claim 9, characterized in that the internal combustion engine is provided with a carbureting mixture formation.

11. An installation according to claim 3, wherein said relief valve means is provided with a cross section corresponding approximately to the combustion air requirement of the internal combustion engine at partial load.

12. An installation in internal combustion engines for preventing the escape of fuel out of its mixture formation system into the atmosphere, in which combustion air is taken out of the atmosphere by way of a suction pipe meanS and an air filter means connected in the input thereof and is enriched with fuel prior to the entry into the combustion spaces by way of a fuel-feed means, characterized by a closure valve means on the side of the air inlet aperture of the air filter means, and adjusting motor means for actuating the closure valve means, said adjusting motor means being an electric rotating armature magnet having an adjusting range of about 90* automatically engaged by way of control means in dependence of at least one operating condition of the internal combustion engine.

13. An installation according to claim 12, characterized in that said adjusting motor means has a permanent-magnet-type end position lock means.

14. An installation in internal combustion engines for preveNting the escape of fuel out of its mixture formation system into the atmosphere, in which combustion air is taken out of the atmosphere by way of a suction pipe means and an air filter means connected in the input thereof and is enriched with fuel prior to the entry into the combustion spaces by way of a fuel-feed means, characterized by a closure valve means on the side of the air inlet aperture of the air filter means, and adjusting means for actuating the closure valve means, said adjusting means being automatically engaged by way of control means in dependence of at least one operating condition of the internal combustion engine, the closure valve means being arranged in the suction connection of the air filter means, the closure valve means including relief valve means and two support plates held from each other at a spacing and of sealing lamellae displaceably arranged between the support plates, the diameter of said lamellae being larger than the cross section of the suction connection of the air filter means.

15. An installation internal combustion engines for preventing the escape of fuel out of its mixture formation system into the atmosphere, in which combustion air is taken out of the atmosphere by way of a suction pipe means and an air filter means connected in the input thereof and is enriched with fuel prior to the entry into the combustion spaces by way of a fuel-feed means, the installation including a starter ignition switch, characterized by a closure valve means on the side of the air inlet aperture of the air filter means, and adjusting means for actuating the closure valve means, said adjusting means being automatically engaged by way of control means in dependence of at least one operating condition of the internal combustion engine, and a contact at the starter ignition switch and a time-delay relay connected behind said contact being provided in the energizing circuit for the adjusting means.

16. An installation in internal combustion engines for preventing the escape of fuel out of its mixture formation system into the atmosphere, in which combustion air is taken out of the atmosphere by way of a suction pipe means and an air filter means connected in the input thereof and is enriched with fuel prior to the entry into the combustion spaces by way of a fuel-feed means, the installation including a starter ignition switch, characterized by a closure valve means on the side of the air inlet aperture of the air filter means, and adjusting means for actuating the closure valve means, said adjusting means being automatically engaged by way of control means in dependence of at least one operating condition of the internal combustion engine, and a Zener diode with predetermined breakdown voltage being provided in the energizing circuit from the starter ignition switch to said adjusting means, said breakdown voltage being produced by a means operable in proportion to the engine rotational speed.

17. An installation in internal combustion engines for preventing the escape of fuel out of its mixture formation system into the atmosphere, in which combustion air is taken out of the atmosphere by way of a suction pipe means and an air filter means connected in the input thereof and is enriched with fuel prior to the entry into the combustion spaces by way of a fuel-feed means, characterized by a closure valve means on the side of the air inlet aperture of the air filter means, and adjusting means for actuating the closure valve means, said adjusting means being automatically engaged by way of control means in dependence of at least one operating condition of the internal combustion engine, and a vacuum sensor means inserted into the suction connection downstream of the closure valve means which closes the energizing circuit for energizing the adjusting means for the actuation of the closure valve means by way of a switch.