FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
PROVISIONAL SPECIFICATION
(See Section 10; rule 13)
TITLE OF THE INVENTION
Improved Fuel Supply Module Mounting Arrangement For Automotive Fuel Tank And Method Of Mounting Thereof
APPLICANTS
TATA MOTORS LIMITED, an Indian company
having its registered office at Bombay House,
24 Homi Mody Street, Hutatma Chowk,
Mumbai 400 001 Maharashtra, India
INVENTOR
Mr. Umesh Abhyankar & Mr. Abhay Deshpande,
both Indian Nationals
of TATA MOTORS LIMITED,
an Indian company having its registered office
at Bombay House, 24 Homi Mody Street, Hutatma Chowk,
Mumbai 400 001 Maharashtra, India
PREAMBLE TO THE DESCRIPTION
The following specification describes the invention


FIELD OF INVENTION
This invention relates to fuel supply system for automobile vehicles and more particularly, to a fuel supply module mounting arrangement and method of mounting thereof.
BACKGROUND OF INVENTION
The use of fuel pump module to pump fuel from fuel tanks is well known in the automotive industry. A typical fuel pump module may include a fuel pump, a fuel reservoir, a fuel level sensor, a suction filter positioned upstream of the pump inlet and a pressure regulator.
Installation of the fuel pump module into the fuel tank is made possible by an opening or a hole in the tank that provides access to the inside of the tank. The opening is normally formed in the top wall of the tank and is normally circular.
In a typical fuel supply unit mounting, for a vehicle, a covering flange is configured for sealing a fuel pump to a wall of a fuel tank with gasket. Covering flange is secured to wall of fuel tank with metal studs, without passing through the gasket flange mounted for sealing the fuel supply unit with wall of fuel tank. The fuel supply module is structured such that a bottom wall of module is continuously held in abutting contact with bottom wall portion of the fuel tank.
Attempts have heretofore been made to provide an enhanced, sealed mounting arrangement, for a fuel supply module.
OBJECTS OF INVENTION
The main object of this invention is to provide an improved fuel supply module mounting arrangement for automotive fuel tank with enhanced sealing of fuel vapours.


Yet another object of this invention is to provide an improved fuel supply module mounting arrangement for automotive fuel tank which is simple in construction and cost effective.
BRIEF DESCRIPTION OF INVENTION
The fuel supply module mounting arrangement for automotive fuel tank in accordance with this invention basically comprises of a metal mounting ring, fuel pump module disposed with covering flange, gasket flange, mounting studs which protrude upwardly against top wall of fuel tank, and a metal flange. Wherein a single opening is provided on upper wall of fuel tank for mounting fuel pump module. The fuel pump module is mounted on the metal mounting plate having projection welded studs. Gasket flange is inserted between metal mounting ring and covering flange. A metal flange is fastened with former assembly with the aid of flange nuts. Complete assembly of fuel pump module is always submerged in swirl pot mounted on bottom of fuel tank. Fuel pump module is a short column with one end fixed to the upper wall of the fuel tank and other free end protected against slosh forces inside fuel tank with able aid of swirl pot. Moreover the ratios of thickness of gasket seal, covering flange and metal flange are maintained in fixed proportions in accordance with fuel pump module length to ensure effective sealing without hampering the intended cause and increasing the material costs.
This invention ensures improved sealing on account of dearth of counter spring force on or after bottom of the fuel pump module.
This invention ensures improved sealing in regards to absence of additional apertures on the tank upper wall other than that for accommodating fuel pump module.
This invention ensures improved sealing on account of assistance gained from the self weight of fuel pump module backing up the sealing compel provided by the fastening studs.


This invention ensures improved sealing on account of assistance gained from optimized ratios of mating elements with respect to the length of fuel pump module.
This invention ensures reduced assembly cost in regards to absence of springs required for creating abutment force acting against slosh forces in fuel tank.
This invention ensures reduced material costs in regards to usage of optimized thickness ratios of the mating elements of the mounting arrangement.
BRIEF DESCRIPTION OF INVENTION
Figure 1 shows Sectional view, of an automotive fuel supply module mounting
arrangement
Figure 2 shows Exploded perspective view of fuel supply module mounting
arrangement
DETAILED DESCRIPTION OF INVENTION
Referring now to the drawings wherein the showings are for the purpose of illustrating a preferred embodiment of the invention only, and not for the purpose of limiting the same,
Referring to FIG. 1, a sectional view of an automotive fuel supply module assembly illustrating fuel tank (1) includes an upper wall (2) having an access port (3) there in. The access port (3) is closed and sealed by a metal mounting ring (4) and a gasket seal (5) and another metal flange (8).
Referring to fig. 2, mounting studs (9) are arranged circumferentially on mounting ring (4) and are projection welded to it. A gasket seal (5) is mounted over mounting ring (4) with projection welded studs (9) passing through holes in it. The covering flange (7) is mounted over mounting ring (4) with gasket seal (5) inserted in between. The arrangement is then clamped to studs (9) with flange nuts (10) over metal flange


(8). The complete assembly is always submerged in swirl pot (11) assisting to sustain against the slosh forces produced in fuel tank (1) as referred in fig. 1.
Referring to fig. 1, fuel pump module (6) acts as a short column with one end fixed to the upper wall (2) of the fuel tank and other free end protected against slosh forces inside fuel tank (1) with able aid of swirl pot (11). Moreover the ratios of thickness of gasket seal (5) , covering flange (7) and metal flange (8) are maintained in fixed proportions in accordance with fuel pump module (6) length to ensure effective sealing without hampering the intended cause and increasing the material costs.
Referring to fig. 1, fuel pump module (6) is fixed to upper wall (2) of the fuel tank (1) and is submerged in swirl pot (11) without any abutting forces from bottom wall (12) of fuel tank (1) on or after bottom of the fuel pump module (6).
The foregoing description is a specific embodiment of the present invention. It should be appreciated that this embodiment is described for purpose of illustration only, and that numerous alterations and modifications may be practiced by those skilled in the art without departing from the spirit and scope of the invention. It is intended that all such modifications and alterations be included insofar as they come within the scope of the invention as claimed or the equivalents thereof.