LP-GAS RAM-AIR CHARGER

• US 3,664,315 A
• Filed: 03/16/1970
• Issued: 05/23/1972
• Est. Priority Date: 03/16/1970
• Status: Expired due to Term

• Current Assignee: John B. Kramer
• Original Assignee: John B. Kramer
• Inventors: Kramer, John B.
• Primary Examiner(s): Wayner, William E.
• Application Number:
  US05/019,950
• Time in Patent Office: 799 Days
• Field of Search: 123/120,121 239/424.5,430
• US Class Current: 123/445
• 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 21/0212 comprising at least 3 C-Atoms, e.g. liquefied petroleum gas [LPG], propane or butane
• CPC Class Codes: F02M 21/047 Venturi mixer
• CPC Class Codes: Y02T 10/30 Use of alternative fuels, e.g. biofuels

Abstract

Method and apparatus for introducing vapor of LPG or natural gas into the air intake system of an internal combustion engine.

Claims

1. A method of introducing vapor of liquefied petroleum gas or natural gas into the air intake system of an internal combustion engine which comprises obtaining and regulating the pressure of said vapor in the range of about 250 to 350 pounds per square inch, injecting said vapor at a point of constriction in air entrainment gas injection means at an angle so as to create a substantially maximum venturi effect at said point of constriction, entraining separately introduced air with said vapor at the point of constriction, moving at least a portion of the separately introduced air through means in said injection means positioned with respect to the movement of the injected vapor so as to promote mixing and entraining of air by said vapor, immediately after said constriction subjecting the vapor and said air to mixing, and further entraining secondarily supplied air as a result of the mixing downstream of said constriction, and before any burning of the mixture takes place, and then moving said vapor and air, homogeneously mixed, for introduction into the internal combustion engine.

2. The method as recited in claim 1, the regulated pressure being about 300 pounds per square inch.

3. Apparatus for entraining and mixing air with vapor of liquefied petroleum gas or natural gas comprising air entrainment gas injector means to be located within the engine air intake system of an internal combustion engine, said means having a point of constriction for the creation of a venturi effect, nozzle means for injecting vapor into said air entrainment gas injector means, said nozzle means located adjacent said point of constriction at an angle so as to create s substantially maximum venturi effect at said point of constriction, intake ports in said air entrainment air injector means for introducing air into said means, mixing ports in said air entrainment gas injector means for movement through said last mentioned means of said introduced air for substantial homogeneous mixture at and after the point of constriction with the vapor, and means for substantially homogeneously mixing secondarily derived air with said substantially homogeneous mixture previously defined downstream of said point of constriction and before any burning of the mixture takes place.

4. Apparatus as recited in claim 3, the axis of said mixing ports at an angle of about 20* to 25* to the axis of said nozzle means.