FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
PROVISIONAL SPECIFICATION
(See Section 10; rule 13)
TITLE OF THE INVENTION CNG MOUNTING ASSEMBLY AND VENTILATION SYSTEM THEROF
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
INVENTORS
Sandip R Gholkar
Indrajeet P Kondhare
An 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 particularly describes the invention.

FIELD OF INVENTION
This present invention is related to CNG system and more particularly CNG mounting assembly and ventilation system thereof.
BACKGROUND OF INVENTION
Generally CNG vehicle having cylinder which is mounted on long member with the help of mounting bracket and strap are used to hold the cylinder in position. The said straps are tightened at the end of it by stud means which is difficult to access because two ends of said straps are inside the cylinder surface. In order to make the two ends of said straps accessible, more space is required between two cylinders which are not desirable due to packaging constraint.
For providing ventilation system in the CNG vehicle, separate pipes are used which are connected to the said cylinder valve which requires more connection points on the said cylinder valve which leads to more chance of gas leakage. For venting the gas in atmosphere separate pipe is used which is provided on Body In Wide (BIW).
Moreover the venting connection through pipe is required between high pressure regulator and said cylinder valve which leads to more connections and further increases risk of gas leakage.
BRIEF DESCRIPTION OF INVENTION
In accordance with this invention, CNG mounting assembly and ventilation system comprises; CNG cylinder (1) mounted on the frame connected to cross member, cylinder mounting bracket (2) provided on the said frame, two piece mounting strap (3) configured to be fitted on the said mounting bracket, solenoid cylinder valve (4) provided at one end of said cylinder for controlling the flow of gas, at least three corrugated hose (5), one is connected between two said cylinder valve and two are connected at other end of the cylinder valve for venting the gas, at least two nipples (6) mounted on the floor of vehicle and said corrugated hose connected to one end of said nipple for holding the said corrugated hose, high pressure pipes(ll) , receptacle(8) disposed in fuel filler for filling the gas in the said


cylinder comprises pressure gauge (9), said receptacle (8) mounted on the mounting bracket (10), said high pressure pipe (11) routed beneath the floor to release the gas to atmosphere, high pressure regulator (7) to regulate gas pressure which is mounted on LH side long member with the help of mounting bracket towards the front end of vehicle to maintain the minimum specified distance between engine and regulator to reduce knocking, high pressure filter (12) for filtering the high pressure gas connected between said receptacle and said regulator, low pressure filter connected between said regulator and engine which supply low pressure gas to the engine through rubber hose.
Regulator heating system provided from engine to avoid the freezing of gas in regulator.
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,
Figure-01 shows rear view of CNG cylinder mounting assembly.
Figure-02 shows details of high pressure regulator mounting.
Figure-03 shows the details of receptacle mounting assembly.
Figure-04 shows the top view of said CNG mounting system.
Figure-05 shows the rear view of CNG cylinder mounting and high pressure pipes.
Figure-06 shows the side view of receptacle mounting assembly.
Figure-07 shows the details of high pressure filter mounting assembly.
Figure-08 shows the top view of CNG cylinder mounting assembly.
Figure -09 shows the side view of CNG cylinder mounting assembly.
Now referring to figure-01 to 09,In accordance with this invention, CNG mounting assembly and ventilation system comprises; CNG cylinder (1) mounted on the frame connected to cross member, cylinder mounting bracket (2) provided on the said frame, two piece mounting strap (3) configured to be fitted on the said mounting bracket , solenoid cylinder valve (4) provided at one end of said cylinder for controlling the flow of gas, at least three corrugated hose (5), one is connected between two said cylinder valve and two are connected at other end of the cylinder valve for venting the gas, at least two nipples (6) mounted on the floor of vehicle and said corrugated hose connected to one end of said nipple for holding the said


corrugated hose, high pressure pipes(l 1) , receptacle (8) disposed in fuel filler for filling the gas in the said cylinder comprises pressure gauge (9) , said receptacle (8) mounted on the mounting bracket (10), high pressure pipe (11) routed beneath the floor to release the gas to atmosphere, high pressure regulator (7) to regulate gas pressure which is mounted on LH side long member with the help of mounting bracket towards the front end of vehicle to maintain the minimum specified distance between engine and regulator to reduce knocking, high pressure filter (12) for filtering the high pressure gas connected between said receptacle and said regulator, low pressure filter connected between said regulator and engine which supply low pressure gas to the engine through rubber hose.
Regulator heating system provided from engine to avoid the freezing of gas in regulator.
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.