US 5,634,442 A · Method and apparatus providing cold startup assistance for small gasoline fueled engines

Abstract

Start-up assistance is provided for small low-horsepower gasoline fueled internal combustion utility engines. A portable supply of starting fuel, such as naphtha, benzine, benzol, ether or alcohol, is directly injected through an temporarily openable aperture effective as an indraft port and entered into the carburetor bore, or an intercurrent carburetion duct utilized between the carburetor and the engine's intake port, to thereby enable immediate intake of the starting fuel through the engine valving and permit spark ignition and combustion upon initial engine cranking. Manual starting fuel injection also serves to overcome engine start-up difficulty generally caused by the inferior low-temperature volatility of contemporary gasoline products. As a result, this occurrence of nearly immediate engine firing remarkably enhances the liklihood for carburetion and induction of the usual running fuel supply and continued engine operation.

Claims20

Dependent claims

A method for portable prestart manual injection of a starting fuel admixture into an intercurrent carburetion duct immediately coupled between a throttle portion of a carburetor and a combustion chamber intake port portion of an internal combustion engine, comprising:

storing a quantity of starting fuel in a portable containment vessel including a tubule extending therefrom;
temporarily uncovering an aperture in the intercurrent carburetion duct;
inserting said tubule through the aperture;
urging a portion of the starting fuel to issue forth from the portable vessel through the tubule and into the intercurrent carburetion duct;
withdrawing the tubule from the aperture;
recovering the aperture;
and, cranking the engine to initiate startup of the engine.

4 more elements

A method for portable prestart manual injection of a starting fuel admixture through a temporary priming port into an intercurrent carburetion bore immediately coupled between an air and running fuel mixing portion of a carburetor and a combustion chamber intake port of an internal combustion engine, comprising:

storing a supply of the starting fuel admixture in a portable containment vessel including a tubule extensive therefrom;
uncovering the temporary priming port;
inserting said tubule through the temporary priming port;
urging a portion of the starting fuel admixture to issue forth from the portable containment vessel, through the tubule and into the intercurrent carburetion bore;
withdrawing the tubule from the temporary priming port;
recovering the temporary priming port;
and, cranking the engine to initiate startup of the engine.

4 more elements

Means for enabling temporary manual injection of a starting fuel admixture into an intercurrent carburetion duct means coupled between an air and running fuel mixing portion of a carburetor means and combustion chamber intake port means of an internal combustion engine means, comprising:

means providing a usually covered priming port means coupled into the intercurrent carburetion duct means;
means enabling temporary uncovering of the priming port means;
means providing a portable supply of the stinting fuel admixture including a tubule means extending therefore which is sized for temporary insertion through the priming port means and into the intercurrent carburetion duct means;
means for effecting manual injection of a priming portion of the starting fuel admixture through the tubule means, as temporarily inserted through the temporarily uncovered said priming port means:
and effectively into the intercurrent carburetion duct means;
means for recovering and sealing the temporarily uncovered said priming port means;
and,
means for cranking and thereby at least attempting startup of the engine means.

5 more elements

Dependencies are inferred from the claim text.

Method and apparatus providing cold startup assistance for small gasoline fueled engines

Life of this patent

Method and apparatus providing cold startup assistance for small gasoline fueled engines

Life of this patent

Abstract

Claims20