Gas injection system

• US 5,025,758 A
• Filed: 04/25/1990
• Issued: 06/25/1991
• Est. Priority Date: 04/03/1990
• Status: Expired due to Fees

• Current Assignee: Joco Djurdjevic
• Original Assignee: Joco Djurdjevic
• Inventors: Djurdjevic, Joco
• Primary Examiner(s): CROSS, ETHEL R
• Application Number:
  US07/514,312
• Time in Patent Office: 426 Days
• Field of Search: 123/527, 123/452
• US Class Current: 123/527
• CPC Class Codes: F02B 43/00 Engines characterised by operating on gaseous fuels; Plants including such engines engines characterised by the gas-air charge being ignited by compression ignition of an additional fuel F02B7/06; engines convertible from gas to other fuel consumption F02B69/04
• CPC Class Codes: F02M 21/0215 Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
• CPC Class Codes: F02M 21/0233 Details of actuators therefor
• CPC Class Codes: F02M 21/0239 Pressure or flow regulators therefor
• CPC Class Codes: F02M 21/029 Arrangement on engines or vehicle bodies; Conversion to gaseous fuel supply systems
• CPC Class Codes: Y02T 10/30 Use of alternative fuels, e.g. biofuels

Abstract

This invention relates to apparatus for metering the supply of natural gas to an internal combustion engine having an air intake manifold and throttle valve mounted therein comprising: a pressure regulator for regulating the pressure of said natural gas; a sensor plate associated with said air intake manifold and moveable in response to variations in said throttle; and a valve being actuable by said moveable sensor plate to vary the supply of natural gas to said air intake manifold in response to variations in said throttle valve so as to meter the supply of natural gas to said internal combustion engine.

Claims

1. Apparatus for metering the supply of natural gas to an internal combustion engine having an air intake manifold and throttle valve mounted therein comprising:

(a) pressure regulator means for regulating the pressure of said natural gas;

(b) sensor plate means associated with said air intake manifold and moveable in response to variations in said throttle valve;

(c) valve means being actuable by said moveable sensor plate means to vary the supply of natural gas to said air intake manifold in response to variations in said throttle valve so as to meter the supply of natural gas to said internal combustion engine.

2. Apparatus as claimed in claim 1 wherein said sensor plate means includes arm means associated with said air intake manifold, said arm means disposed for pivotable movement about one end thereof, and said other end of said arm means including a sensor plate whereby said sensor plate and said arm means pivotly move about said one end of said arm means in response to variations in said throttle valve.

3. Apparatus as claimed in claim 2 further including chamber means for receiving said valve means for relative slidable movement therein.

4. Apparatus as claimed in claim 3 wherein one end of said valve means contacts said arm means between said ends of said arm means, said valve means being actuable by said arm means when said sensor plate and said arm means move in response to variations in said throttle.

5. Apparatus as claimed in claim 4 wherein said other end of said valve means is disposed within said chamber means and a portion of said natural gas is fed into the region bounded by said chamber means and said other end of said valve means so as to minimize fluctuation of said valve means in response to pivotable movement of said arm means and said sensor plate in response to variations of said throttle.

6. Apparatus as claimed in claim 5 wherein said chamber means includes an input natural gas opening for receiving natural gas into said chamber means, and output natural gas opening for communicating natural gas to said air intake manifold.

7. Apparatus as claimed in claim 6 wherein said valve means control the opening and closing of said input and output natural gas openings to control the supply of natural gas to said air intake manifold in response to variations in said throttle means.

8. Apparatus as claimed in claim 7 further including high pressure solenoid means for opening or shutting off the supply of natural gas to said chamber means.

9. Apparatus as claimed in claim 8 including natural gas cylinder means for storing said natural gas.

10. Apparatus as claimed in claim 9 including stainless steel conduit means for communicating said natural gas from said natural gas cylinder means to said high pressure solenoid means, said pressure regulator means, said chamber means and to said air input manifold means.

11. Apparatus as claimed in claim 10 including adjustable means associated with said arm means for adjusting the mixture of said natural gas and air to said air intake manifold.

12. Apparatus as claimed in claim 11 wherein said pressure regulator means and said chamber means are disposed in a single unit.

13. Apparatus as claimed in claim 12 wherein said unit includes a first stage pressure regulator means for regulating the pressure of said natural gas and a second stage pressure regulating means for further regulating the pressure of said natural gas.

14. Apparatus as claimed in claim 12 wherein said unit includes multiple stage pressure regulator means for regulating the pressure of said natural gas in multiple stages.

15. In a method for metering the supply of natural gas to an air intake manifold having throttle means mounted therein for an internal combustion engine comprising the steps of:

(a) regulating the pressure of said natural gas from natural gas cylinder means;

(b) metering said regulated natural gas by valve means so as to apply said metered natural gas to said air intake manifold;

(c) actuating said valve means by sensor plate means associated with said intake manifold, said sensor plate means responding to variations in said throttle so as to meter the supply of natural gas to said air intake manifold.

16. In a method as claimed in claim 15 wherein said sensor plate means actuates said valve means for slidable movement within chamber means.

17. A method as claimed in claim 16 including the step of applying a portion of said natural gas to said chamber means so as to minimize fluctuations of said valve means when said sensor plate means actuates said valve means in response to variations in said throttle means.

18. A method as claimed in claim 17 wherein said regulating and metering of said natural gas is conducted in a single unit.

19. A method as claimed in claim 17 wherein said regulating and metering of said natural gas is conducted in separate units.