ITRM20000599A1 - VARIABLE SUBMERGED EXHAUSTS. - Google Patents

Description

TITLE: S SUBMERSIBLE VARIABLE CARCHI

"Submerged Variable Exhausts" for exhaust gases related to marine engines intended for planing boats, for the reduction of costs and atmospheric / acoustic pollution. SUMMARY:

The invention relates to the installation of pipes / manifolds for the expulsion of exhaust gases, positioned on the transom and below the waterline, i.e. underwater, and related exhaust pipes of smaller diameter than starting from any point of the main pipe are positioned above the waterline for the expulsion of idle gases.

This system allows the drains to remain submerged under water during maneuvering, mooring, idling and / or before gliding, thus obtaining a great reduction in noise and atmospheric pollution. While during navigation or after gliding, since the boat is completely out of the water, these allow the perfect disposal of exhaust gases while minimizing noise pollution thanks to their positioning. They are also very cheap in construction / application.

DESCRIPTION:

The invention relates to a "mixed" exhaust gas disposal system for marine engines relating to planing boats.

It is well known that all motor boats are equipped with pipes for the emission of exhaust gases (see Table N ° 1). Normally these exhaust pipes are installed above the waterline to release the exhaust gases themselves which create considerable problems of atmospheric pollution, particularly in the ignition, maneuvering, start / glide phases.

Another problem is represented by noises; normally, mufflers / silencers are used, installed in the engine room (see table n ° 2) which, however, have the counter-indication of stealing useful space in the engine room and reducing the performance of the engines, as well as the high cost. Furthermore, the considerable wear, maintenance and cost must be considered and, in any case, they do not solve the great problem of atmospheric pollution during the ignition, maneuvering, anchoring and, even worse, planing / starting phases where the boat puts the engines under stress. which in this phase have the greatest emission of exhaust gases / fumes.

Alternatively, "submerged" drains are installed.

These types of submerged drains are installed under the hull / bottom (see table n ° 3). The engines then discharge the gases directly under the water halfway, but this type of system presents significant problems:

1) When starting the engines, the water acts as a plug and the gases are unable to escape, creating violent counter pressures that damage the engines, and also create annoying jolts that alter stability.

2) During navigation there is no complete and optimal disposal of exhaust gases and back pressures are created which inevitably tend to significantly raise the temperature of the exhaust gases and damage the engines and reduce their performance.

3) The opening under the hull / bottom (see table n ° 3), whether it is a hole or any other shape, reduces the hydro dynamism of the hull, reducing its performance, consistency and safety of the hull itself.

4) The exhaust gases that come out from under the hull dirty the hull (reducing its performance) and, escaping halfway, pollute the interior / cockpit of the boat and / or the cockpit.

In order to optimize / improve in a remarkably economic way all types of exhaust gas disposal systems / plants intended for planing boats, a system of "Variable Submerged Exhausts" has been studied / invented: this name has been assigned as these they work both underwater and out of the water.

This system also provides for the installation of drain pipes for the minimum, secondary pipe (see table N ° 5). That is a branch pipe that from any point of the main drain pipe, which goes underwater, comes out above the waterline. That is, a smaller sized tube protrudes above the waterline so that during the ignition phase of the engines, with the boat stationary and / or in displacement, the "plug" effect of the water is not formed as the reduced quantity of exhaust gases of idle is disposed of by the secondary pipe.

The following advantages are thus determined:

1) When the boat is idling, maneuvering, mooring, anchoring, or in displacement attitude (before gliding), the discharges remain underwater, minimizing atmospheric pollution, remission of bad smells and in particular noises.

2) When the boat is underway, or gliding, the stern is completely out of the water, letting the exhaust gases escape (see Table n ° 4).

The following further advantages are thus obtained:

1) Maximum engine efficiency;

2) Elimination of gases inside the well;

3) Elimination of holes in the hull with maximum performance of the hull;

4) Cleaning the hull;

5) Elimination of noises, as the positioning of the outlet pipes is very low and in the most extreme part of the boat, below the stern platform; 6) Remarkable economy.

CLOSURE:

The materials and the dimensions of the invention as described above, illustrated in the accompanying drawings and claimed hereinafter, may be different according to requirements. Furthermore, all the details can be replaced with other technically equivalent ones, without thereby departing from the protective scope of the patent.

Claims (1)

CLAIMS: The first part of the exhaust gas pipes / manifolds depart from the engines form a "Gooseneck" or curve that serves to prevent sea water from entering the engines, this part of the exhaust pipe / manifold will be connected by means of of a high-strength rubber hose to the fixed hose / manifold that continues along the bilge and exits through the transom below the waterline (submerged). The rubber hose has the fundamental importance of reducing vibrations, as well as for flexibility, so that it can be positioned anywhere (see Table N ° 5). Thanks to its positioning (in the lower part of the transom) these exhaust holes remain immersed during the maneuvering, mooring, etc. phase, i.e. in displacement, and in these phases the idle gases are expelled from the idle pipes which by deviation from the main pipes they come out above the waterline, while when the boat is gliding the exhaust holes, being out of the water, allow the exhaust gases to be perfectly disposed of.