Device at internal combustion engines

Details Device at internal combustion engines Device at internal combustion engines

1989-04-25

1990-11-13

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Auxiliary air or oxygen added to combustible mixture

123432, 123568, 123 25A, F02M 2300

Patent

active

049694464

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field of the Invention:
The present invention relates to an internal combustion engine.
Description of the Related Art:
DE-1,933,514-A1 discloses a fuel injection system for atomizing fuel. However, this system cannot be used to effectively supply fluid directly to the inlet opening of a combustion chamber. The continuously operating injection valve is so big that if it is arranged close to the inlet valve and if it is arranged so as to inject fluid in the desired direction, then it disturbs the air stream. The problems increase dramatically if the injection valve is surrounded by an additional mantle.
An alternative suggested in the German publication is to convey the atomized fluid in a tube, possibly provided with means for preheating. However, atomization is more difficult in this alternative, particularly if the fluid is water or alcohol.
The prior art has not been able to achieve continuous injection in close proximity to an inlet valve without disturbing the air flow, incorrectly aligning the atomizer or deteriorating the atomization.
Further, known continuous injection valves get stuck when run with water and/or alcohol. The known injection valves must be cleaned after each period of non-use that lasts for a period of hours.
Further, it is especially important that the fluid not be atomized too early. The fluid should be atomized just before it is sucked into the combustion chamber. But according to the German publication, admixing of the fuel and the air occurs on the way to the inlet opening.


SUMMARY OF THE INVENTION

An object of the present invention is to provide a very simple device for atomizing and injecting small quantities of liquid into a cylinder.
The present invention relates to an internal combustion engine which includes: a combustion chamber with a suction opening; an inlet valve for closing the suction opening; a fluid supply line with an open end; and a gaseous medium supply line with an open end. The open end of the fluid supply line is in close proximity to the suction opening. The gaseous medium supply line surrounds a portion of the fluid supply line in the vicinity of the open end of the fluid supply line. The open end of the gaseous medium supply line is in close proximity to the open end of the fluid supply line. And the open end of the gaseous medium supply line is directed toward the suction opening of the combustion chamber. In operation, fluid is supplied through the fluid supply line in such small quantities that the fluid is in an almost pressure-free condition at the open end of the fluid supply line. The fluid is atomized by supplying a gaseous medium through the gaseous medium supply line and past the open end of the fluid supply line at a pressure which is different than the pressure prevailing outside of the open end of the gaseous medium supply line.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a vertical cross-sectional view through a portion of a combustion engine in accordance with the invention.
FIG. 2 is a cross-sectional view along the line II--II of FIG. 1.
FIGS. 3-6 are enlarged cross-sectional views through different embodiments of an end portion of a supply line in accordance with the invention.


DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

A portion of an internal combustion engine is illustrated in FIGS. 1 and 2. The engine includes a cylinder head 11, an inlet channel 12, a combustion chamber 13 and an inlet valve 14. The valve 14 cooperates with a valve seat 15. The cylinder head 11 includes an exhaust channel 16 and an outlet valve 17.
A bore 18 is provided in the inlet channel 12. A supply line 19 for supplying a fluid (e.g., water, which, e.g., may be admixed with an antifreeze agent) is introduced into the cylinder head 11 through the bore 18. The supply line 19 is surrounded by and spaced apart from a second supply line 20. The second supply line is adapted to supply a gaseous medium at a pressure which deviates from the pressure prevailing at an orifice 21.
The orifice 21 is preferably situated in cl

REFERENCES:
patent: 3677241 (1972-07-01), Gele et al.
patent: 4351304 (1982-09-01), Schweizer
patent: 4361126 (1982-11-01), Knapp et al.
patent: 4387695 (1983-06-01), Hoppel et al.
patent: 4465050 (1984-08-01), Igashira et al.
patent: 4566634 (1986-01-01), Wiegand
patent: 4640234 (1987-02-01), Olsson et al.
patent: 4714063 (1987-12-01), Oda et al.

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