Exhaust and drain structure for vessels

Details Exhaust and drain structure for vessels Exhaust and drain structure for vessels

2002-12-04

2004-08-03

Basinger, Sherman (Department: 3617)

Marine propulsion

Means for accomodating or moving engine fluids

Means for handling exhaust gas

C440S08900C, C440S08900C

Reexamination Certificate

active

06769944

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an exhaust and drain structure for vessels, and more specifically, to an exhaust and drain structure for discharging exhaust gas from an engine mounted on a vessel through an exhaust pipe having a water jacket and into a water muffler together with water passed through the water jacket.
2. Description of Background Art
Hitherto fore, an exhaust and drain structure for vessels is known as shown in FIG.
5
and as disclosed in Japanese Patent No. 2,770,135.
The exhaust and drain structure is adapted to discharge exhaust gas from an engine
1
mounted on a vessel through an exhaust pipe
2
having a water jacket
2
a
into a water muffler
3
together with water passed through the water jacket
2
a.
The interior of the water muffler
3
is divided into a first chamber
3
c
, a second chamber
3
d
, and a third chamber
3
e
by partition plates
3
a
,
3
b
. The exhaust pipe
2
is connected to the first chamber
3
c
. A first communication pipe
3
f
is provided between the first chamber
3
c
and the second chamber
3
d
for bringing the chambers into communication with each other. A second communication pipe
3
g
is provided for bringing the second chamber
3
d
and the third chamber
3
e
into communication with each other. An exhaust and drain pipe
4
is connected to the third chamber
3
e.
Therefore, exhaust gas and water discharged from the exhaust pipe
2
into the first chamber
3
c
in the water muffler
3
passes through the first chamber
3
c
and the first communication pipe
3
f
and flows into the second chamber
3
d
, then flows from the second chamber
3
d
through the second communication pipe
3
g
into the third chamber
3
e
, and then is discharged from the third chamber
3
e
through the exhaust and drain pipe
4
toward the outside of the vessel.
In the aforementioned exhaust and drain structure in the related art, both an exhaust exit
2
b
and a water outlet port
2
c
of the exhaust pipe
2
are directed toward the partition plate
3
a
of the water jacket
3
and are substantially parallel with each other. Therefore, exhaust gas at high temperature from the exhaust exit
2
b
is directly blown onto the partition plate
3
a
, whereby the temperature of the portion
3
a
1
of the partition plate
3
a
on which exhaust gas is blown rises. However, this portion
3
a
1
also receives water discharged from the outlet port
2
c
. Thus, the increase in temperature is suppressed to some extent.
However, in this related art, since the portion
3
a
1
on which a high temperature exhaust gas is blown and the portion
3
a
1
on which water is discharged are substantially the same and thus located at the same height, the portion
3
a
1
on which exhaust gas is blown is not necessarily cooled effectively. As a consequent, there arises a problem in that the temperature of the water muffler tends to increase.
SUMMARY AND OBJECTS OF THE INVENTION
It is an object of the present invention to provide an exhaust and drain structure for vessels in which the problem as described above is solved and thus the water muffler may be cooled effectively.
In order to achieve the object described above, an exhaust and drain structure for vessels according to the present invention is an exhaust and drain structure for discharging exhaust gas from an engine through an exhaust pipe having a water jacket into a water muffler together with water passed through the water jacket wherein a water outlet port of the aforementioned exhaust pipe is directed toward the upper portion of the inner wall surface of the water muffler on which exhaust gas discharged from the exhaust pipe is directly blown.
An exhaust and drain structure for vessels according to the present invention includes an exhaust and drain structure for discharging exhaust gas from an engine through an exhaust pipe having a water jacket into a water muffler together with water passed through the water jacket wherein an exhaust exit of the aforementioned exhaust pipe is directed directly toward the side surface in the case of the water muffler, and a water outlet port of the aforementioned exhaust pipe is directed directly toward the side surface in the aforementioned case and directed toward the portion upwardly of the portion on which exhaust gas discharged from the aforementioned exhaust pipe is directly blown.
The exhaust and drain structure for vessels according to the present invention is an exhaust and drain structure for discharging exhaust gas from an engine through the exhaust pipe having a water jacket into the water muffler together with water passed through the water jacket, wherein the water outlet port of the aforementioned exhaust pipe is directed toward the upper portion of the inner wall surface of the water muffler on which exhaust gas discharged from the exhaust pipe is directly blown. Therefore, according to this exhaust and drain structure for vessels, the following effects are achieved.
In other words, since the portion of the inner wall surface of the water muffler on which water is discharged is located upwardly of the portion on which exhaust gas is blown, water discharged on the portion on which water is discharged cools the aforementioned portion on which exhaust gas is blown effectively in the process of falling along the inner wall surface.
Therefore, with the exhaust and drain structure for vessels according to the present invention, the portion on which exhaust gas is blown is effectively cooled, and consequently, the water muffler is effectively cooled.
The exhaust and drain structure for vessels according to the present invention is an exhaust and drain structure for discharging exhaust gas from the engine through an exhaust pipe having a water jacket wherein a water muffler together with water passed through the water jacket is provided. The exhaust exit of the aforementioned exhaust pipe is directed directly toward the side surface in the case of the water muffler, and the water outlet port of the aforementioned exhaust pipe is directed directly toward the side surface in the aforementioned case. Therefore, the passage for exhaust and water in the water muffler may be elongated.
When the exhaust exit is directed directly toward the inner surface of the case of the water muffler, the temperature of the case of the water muffler increases. However, according to the structure as set forth in the present invention, the water outlet port in the exhaust pipe is directed directly toward the inner surface of the case, and directed toward the portion upwardly of the portion on which exhaust gas discharged from the aforementioned exhaust pipe is directly blown. Therefore, the portion of the inner surface in the case of the water muffler on which water is discharged is located upwardly of the portion on which exhaust gas is blown. Thus, water discharged on the portion on which water is discharged cools the aforementioned portion on which exhaust gas is blown effectively in the process of falling along the inner surface of the case.
Therefore, with the exhaust and drain structure for vessels according to the present invention, the passage of exhaust gas and water in the water muffler may be elongated, and simultaneously, the portion on which exhaust gas is blown may be cooled effectively though the exhaust exit of the exhaust pipe is directed directly toward the inner surface of the case of the water muffler. As a consequent, the water muffler is effectively cooled.
Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.


REFERENCES:
patent: 5846102 (1998-12-01), Nitta et al.
patent: 6213827 (2001-04-01), Hat

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