Pumps – Motor driven – Electric or magnetic motor
Reexamination Certificate
2000-03-02
2001-09-04
Freay, Charles G. (Department: 3746)
Pumps
Motor driven
Electric or magnetic motor
C123S509000, C123S510000, C137S038000, C137S044000, C137S574000, C137S576000
Reexamination Certificate
active
06283731
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a fuel supplying apparatus for a vehicle of an in-tank type in which a fuel pump is incorporated in a fuel tank, and more particularly to a fuel supplying apparatus for a vehicle which is capable of supplying fuel even when the vehicle is braked quickly.
BACKGROUND ART
FIG. 7
is a side cross-sectional view illustrating a conventional fuel supplying apparatus for a vehicle disclosed in, for example, Japanese Utility Model Examined Publication No. 37178/1989. In
FIG. 7
, reference numeral
1
denotes a main tank for storing fuel
2
,
1
a
denotes a bottom wall of the main tank
1
, and
1
b
denotes a bottom wall opening provided in the bottom wall
1
a
of the main tank
1
. Numeral
3
denotes a setting plate which is oil-tightly attached to the bottom wall opening
1
b
by means of bolts
15
through packing
4
.
A sub-tank
5
which is inserted in the main tank
1
is provided on an inner surface
3
a
of the setting plate
3
, and an in-tank type fuel pump
7
which is attached by a pump holder
6
is provided on an inner bottom surface
5
a
of the sub-tank
5
. FIG.
8
is an enlarged perspective view of a suction filter portion of the fuel supplying apparatus for a vehicle shown in FIG.
7
. In
FIG. 8
, numeral
8
a
denotes an opening portion connected to an inlet port
7
a
(located inside the fuel pump
7
in FIG.
7
and is invisible) of the fuel pump
7
,
8
b
denotes a screen portion for filtering the passing fuel
2
, and
8
c
denotes a protector for preventing the rubbing against each other of the screen portion
8
b
and the inner bottom surface
5
a
of the sub-tank
5
.
The sub-tank
5
is attached to prevent the fuel
2
from not being supplied to an unillustrated engine from the fuel pump
7
when the vehicle body is inclined in a state in which the amount of fuel
2
in the main tank
1
has become small. A discharge port
7
b
of the fuel pump
7
is connected to a main tube
10
by means of a rubber hose
9
. The main tube
10
is bent downward, is oil-tightly passed through the setting plate
3
, and is connected by a joint
14
to a delivery pipe
16
directed to the unillustrated engine. Further, a power supply line
11
having one end connected to a connector
12
outside the main tank
1
has its other end oil-tightly passed through the setting plate
3
and connected to a power supply terminal
13
of the fuel pump
7
.
Next, a description will be given of the supply of the fuel
2
. A voltage is applied from the power supply terminal
13
through the connector
12
and the power supply line
11
to drive the fuel pump
7
, which in turn causes the fuel
2
in the main tank
1
to be sucked from the suction filter
8
, and after the fuel
2
is pressurized by the fuel pump
7
, the fuel
2
passes through the main tube
10
and is supplied to the delivery pipe
16
directed to the unillustrated engine.
However, with the above-described conventional fuel supplying apparatus for a vehicle, since the sub-tank
5
is cup-shaped with its upper surface
5
b
open, during quick braking when the acceleration acting in the vehicle becomes maximum the fuel inside the sub-tank
5
rides over the upper surface
5
b
of the sub-tank
5
and flows to outside the sub-tank
5
. For this reason, there has been a problem in that when the amount of fuel
2
in the main tank
1
has become small, the fuel
2
fails to be supplied to the unillustrated engine by the fuel pump
7
.
The present invention has been devised to overcome the above-describe problem, and its object is to obtain a fuel supplying apparatus for a vehicle which is capable of supplying fuel to the engine even when the vehicle is braked quickly.
DISCLOSURE OF THE INVENTION
In accordance with the present invention, a fuel supplying apparatus for a vehicle for supplying fuel, by means of an in-tank type fuel pump provided in a fuel tank, to outside the fuel tank through a pipe connected to the fuel pump, comprises: fuel holding means having an opening portion which is open in an opposite direction to a forwardly moving direction of the vehicle and formed so as to hold a predetermined amount of fuel in a vicinity of a fuel inlet portion of the fuel pump during the quick braking of the vehicle.
Further, the opening portion has a guide portion for guiding the fuel to the fuel holding means during the quick braking of the vehicle.
Further, the fuel holding means is a tubular case surrounding the fuel inlet portion of the fuel pump.
Further, a portion of the fuel holding means is disposed between the fuel tank and a suction filter portion provided in the fuel inlet portion of the fuel pump.
Furthermore, the fuel holding means is arranged such that a portion of a sealing member for sealing a gap between a setting plate, on which the fuel pump is disposed, and the fuel tank is formed in a concave shape for covering the fuel inlet portion of the fuel pump.
REFERENCES:
patent: 4354521 (1982-10-01), Harde
patent: 4966522 (1990-10-01), Koyama
patent: 5718208 (1998-02-01), Brautigan et al.
patent: 5988213 (1999-11-01), Yoshioka
patent: 1-37178 (1989-11-01), None
patent: PCT/JP97/04214 (1997-11-01), None
Freay Charles G.
Hayes Eric D.
Mitsubishi Denki & Kabushiki Kaisha
Sughrue Mion Zinn Macpeak & Seas, PLLC
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