Marine propulsion – Jet drive – Propulsion fluid is pressurized gas
Patent
1998-12-31
2000-10-17
Morano, S. Joseph
Marine propulsion
Jet drive
Propulsion fluid is pressurized gas
440 38, 60221, B63H 1114
Patent
active
061322709
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention concerns a combustion motor having a combustion chamber for the combustion of the working gas during communication with combustion chamber. The pump chamber can be an explosion phase and a pump chamber which is in communication with combustion chamber. The pump chamber can be filled with a drive fluid by way of an inlet opening, and then can have the drive fluid expelled out of an outlet opening under the action of the combustion gas formed during the explosion phase.
A combustion motor of this kind is known for example from Swiss patent specification No 450 946 and is referred to therein as a reaction motor which can be used for example for driving water craft. In such motors the fluid in the pump chamber represents a kind of a fluid piston which is to be expelled as a whole from the pump chamber by the pressure of the combustion gas.
The known combustion motors of this kind suffer from the disadvantages inter alia of the relatively low level of efficiency of the machine and the low numbers of phases which can be achieved.
SUMMARY OF THE INVENTION
The object of the present invention is to provide an improved combustion motor of the kind set forth in the opening part of this specification.
By virtue of a cooling medium being injected into the pump chamber, the hot combustion gas is abruptly cooled down and as a result experiences a substantial reduction in its volume. The resulting reduced pressure now promotes conveyance of the next fluid piston into the pump chamber and desirably also promotes the conveyance of fresh working gas into the combustion chamber. That provides for a considerable reduction in the duration of the post-filling phase and enhances the level of efficiency of the combustion motor.
A certain implosion also occurs after the explosion phase in conventional combustion motors, but this takes place substantially more slowly and is less highly pronounced as heat exchange with respect to the combustion gas occurs only slowly and incompletely.
Further advantages and details of the invention are described hereinafter with reference to the accompanying drawing in which:
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a first embodiment of the invention, partly in the form of a longitudinal section and partly in the form of a diagrammatic view,
FIG. 2 is a view in cross-section taken along line A--A in FIG. 1,
FIG. 3 is a view in cross-section taken along line B--B in FIG. 2,
FIG. 4 is a view in longitudinal section through a second embodiment of the invention in the form of a boat drive,
FIGS. 5a-5e are views of showing the operating procedure involved in a phase cylinder,
FIG. 6 is a detail view in longitudinal section of an inlet valve,
FIGS. 7a and 7b are detail views of an outlet valve from a side view (a) and a rear view (b),
FIG. 8 is a detail view in longitudinal section of an igniter bar,
FIG. 9 is a detail view of an inner tube of an injector pump, shown in an unrolled condition,
FIG. 10 is a diagrammatic view of a fluid impulsion circuit with a combustion motor according to the invention, and
FIGS. 11a and 11b are diagrammatic views of a tubular piston flow and a piston bubble flow.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to FIGS. 1 through 3, shown therein is a first embodiment of the invention in which a multiplicity of pump chambers 18 are arranged generally in an annular array around a combustion chamber 8. In this case the individual pump chambers 18 are separated from each other by radial partitions 35. A working gas which is capable of exploding is fed to the combustion chamber 8 by way of the combustion chamber check valve 6, a combustion chamber inlet valve 38 and a carburetor 3. For initial ignition when starting the motor, the working gas is conveyed into the combustion chamber 8 by way of the delivery pump 2, which is driven by the drive motor 1. Immediately after initial ignition the delivery pump 2 becomes non-functional as the following charges for the combustion chamber 8 are conveyed by the reduced
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patent: 3060682 (1962-10-01), Kemenczky
patent: 3271947 (1966-09-01), Kemenczky
patent: 4057961 (1977-11-01), Payne
patent: 4535735 (1985-08-01), Yoshinaga et al.
patent: 4726183 (1988-02-01), Gongwer
patent: 5417057 (1995-05-01), Robey
Morano S. Joseph
Siegfried Nagel
Wright Andrew D.
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