WO2008148179A1

WO2008148179A1 - Devices against theft of consumer fuel from vehicular tanks

Info

Publication number: WO2008148179A1
Application number: PCT/BR2008/000165
Authority: WO
Inventors: Wilson Erasmo Rebello
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-08
Filing date: 2008-06-06
Publication date: 2008-12-11
Anticipated expiration: 2009-12-08

Abstract

The patent of invention refers to improvements introduced into a device against theft of consumer fuel, such as diesel oil, gasoline or alcohol in tanks of trucks and other vehicles, through a previously built kit with protector (1) of the original fuel filler, with protector of vent, fuel return line, fuel level sensor (2) and protector of screw cap and fuel transfer cock (3) and a device to reduce the internal diameter of the fuel filler with an effective sensor for capacitance measurement, and assembled in the existing tanks or in new tanks or through the construction and installation of a complementary fuel filler (11)with packing (11-A), installation of a special lodging formed through horizontal plate (12) and vertical plates (13) for protection of the vent, fuel return line and fuel level sensor or through complementary fuel filler with chicane (IC), bringing as advantages the protection of the fuel tanks of vehicles, especially trucks, regarding to fuel theft, the tracking of the usage of the fuel filler, without changing the capacity of the tank or its original assembly, with low adaptation cost and allowing normal fuel supply.

Description

"DEVICES AGAINST THEFT OF CONSUMER FUEL FROM VEHICULAR TANKS"

The present patent of invention refers to improvements introduced into a device against theft of consumer fuel, such as diesel oil, gasoline or ethanol from tanks of trucks and other vehicles, through a previously built and assembled kit in the existing or new tank or through the construction and installation of a complementary fuel filler with packing, installation of a special lodging for protection of the vent, fuel return line and fuel level sensor or through complementary fuel filler with chicane, and a device to reduce the internal diameter of the fuel filler with an effective sensor for capacitance measurement, bringing as advantages the protection of the fuel tanks of vehicles, especially trucks, regarding to fuel theft, the tracking of the usage of the fuel filler without changing the tank's capacity or its original assembly, with low adaptation cost and allowing normal fuel supply.

As it is well known in the technical branch of manufacturing fuel tanks for trucks and other vehicles, and especially in the cargo transport, nowadays there are the following antitheft protection devices: a) Fuel filler cap with conventional key, which is vulnerable to the fuel theft, as the key stays in the hands of the driver for the tank supply; b) Fuel tank with bigger capacity, in order to avoid supplying during the route and the key of the fuel filler cap remaining with the company, presenting limitations in autonomy, increases the fuel weight and consequently decreases the weight of the carried cargo, vulnerability to the theft of fuel through the fuel level sensor or by the tank exhaustion plug; c) Plate of resistant metal welded in the interior part of the tank, just after the end of the fuel filler neck which allows the fuel input but avoids the use of hoses for fuel drainage, presenting the inconvenience of not offering total protection against thefts, because still allows the access to the fuel by the fuel filler when the truck is inclined in a ramp. Furthermore, the plate can be forced to bend with a chisel or another similar element to make the theft of the fuel easier. Its weak point is that in order to verify whether there was the theft or not, it is necessary to leave the cover of the tank of each vehicle and to inspect the state of the plate that is forcibly put back in the place; and d) Instead of the cited plate, a sieve with an opening of at least 6 mm is inserted, being this opening needed to avoid foaming, with the disadvantages of letting pass 5 mm diameter hoses; some meshes of the sieve can be torn and after the theft are reallocated in the original pattern which complicates the inspections, also being necessary to leave the cap and to inspect each tank.

The fuel theft by the vent, fuel return line and fuel level sensor of the current tanks occurs by the injection of pressurized air into the tank forcing the output of the fuel by the supplying fuel filler or by the fuel level sensor housing; a great number of vehicles, mostly trucks, have two tanks of fuel interconnected by a transfer pipe that communicate with each other by way of a compensating line on the bases of the principle of communicating vessels, this keeps the same fuel level in the tanks and avoids the necessity of two fuel pumps in the system, working with only one. One of the most common forms of fuel theft consists in sealing the vent of one of the tanks, preventing air drainage, closing the fuel filler of the same tank with a cloth moist with water or even fuel, the fuel filler of the other tank then is open, and a hose with compressed air - by instance, a hose of pressure gauge for tires - is inserted through the cloth and thus by difference of pressure and with the vent closed, the fuel of the tank that is being pressurized migrates to the other tank by the transfer piping, flowing over the open fuel filler.

Other inconvenience of the current tanks concerning fuel theft through the fuel level sensor is that seals and "U"- shaped protection plates do not prevent the access to the fuel tube clamps in the fuel level sensor and allow the body of the fuel level sensor to be loosened from the tank.

Nowadays, there isn't a specific sensor for fuel filler of consumer fuel tank, because the fuel fillers have very large internal diameters - ranging from 85 mm to 150 mm - which turns the creation of an area for the accommodation of an effective sensor which connects to a monitoring and/or tracking system impossible.

"DEVICES AGAINST THEFT OF

CONSUMER FUEL FROM VEHICULAR TANKS", object of the present patent of invention, was developed to overcome the disadvantages and limitations of the devices against theft of fuel from tanks of trucks or other vehicles, existing nowadays or new ones, because it allows the revealing of fuel theft due to the total protection of the apparent pieces and showing of breakings, through a kit previously built and assembled in the existing or new tanks or through the building and installation of a complementary fuel filler with packing, installation of a special lodging for protection of vent, fuel return line and fuel level sensor or through a complementary fuel filler with chicane, and a sensor for monitoring the usage of the fuel filler in case of an insertion of any object into the tank's interior or even in case of a fuel supply, bringing as advantages the protection of fuel tanks, especially trucks, regards to fuel theft, the tracking of the usage of the fuel filler, without doing alterations in the tank's capacity or in its original assembly, with low cost of adaptations and allowing normal fuel supply.

The kit's fuel filler protector, the first option of fuel filler protector that utilizes packing and the second option of fuel filler protector that uses an chicane according to the present patent, assembled in the fuel filler of the tank, when being forced - as they do it in the case of having the protection plate or sieve - offers very high resistance, not being removed without violation, deforming the tank fuel fillers and becoming a revealing element of the theft attempt. Besides, as its main characteristics is its position above of the fuel level after assembled, even if the tank is full, and lower considerably the internal diameter of the supplying fuel filler, allowing just the passage of the filler nozzle, having as characteristic a fuel diffusion system and the liberation of the air outside of the tank, at the moment of the supply, through rips or holes in the protector's internal part, preventing the theft by inclination of the vehicle, since the same would need to be inclined more than 45 degrees.

The kit's protector of vent, of fuel return line and of fuel level sensor from the present patent and the first option of vent protector from the present patent were developed to overcome the disadvantages and limitations of seals and "IT'-shaped protection plate, once they do not prevent the access to the hose's fixation handles to the fuel level sensor, neither that the body of the fuel level sensor be loosened of the tank, allowing the effective protection of the fuel level sensor, once that is encapsulated and not allows the access to the fixation of the hoses close to the fuel level sensor and also prevents that the fuel level sensor be removed or loosened. Besides that, they avoid injection of compressed air into the tank forcing the output of diesel oil through the supply fuel filler or through the tank's fuel level sensor housing.

For a better understanding the present patent the following drawings are attached:

FIGURE 1., which shows the perspective view of the fuel filler feeding protector of the kit of the present patent assembled in the current fuel filler in a original tank of a truck;

FIGURE 2., which shows the perspective view of the fuel filler cap in the threaded version of the kit of the present patent assembled on the current fuel filler in a original tank of a truck;

FIGURE 3., which shows the perspective view of the fuel filler fuel cap with ring and glove for internal fixation in the current fuel filler of the tank of the kit of the present patent assembled on the current fuel filler in a original tank of a truck;

FIGURE 4., which shows the perspective view of the guide tube with sealing ring and limiting pin of the fuel filler of the present patent assembled on the current fuel filler in a original tank of a truck;

FIGURE 5., which shows the perspective view of the cage, in a shape of spiral spring, of the kit of the present patent;

FIGURE 6., which shows the perspective view of the gasket ring of the kit of the present patent assembled in the current fuel filler in a original tank for Scania, Ford and Volkswagen trucks;

FIGURE 7., which shows the perspective view of the gasket ring of the kit of the present patent assembled in the current fuel filler in a original tank for Volvo trucks; FIGURE 8., which shows the perspective view of the gasket ring of the kit of the present patent assembled in the current fuel filler in a original tank for Mercedes Benz trucks;

FIGURE 9., which shows the perspective view of the vent protector, fuel return line and fuel level sensor of the present patent for a fuel tank of a Scania truck;

FIGURE 10., which shows the perspective view of the vent protector, fuel return line and fuel level sensor of the present patent for a fuel tank of a Volkswagen and Ford trucks;

FIGURE 11., which shows the perspective view of the vent protector, fuel return line and fuel level sensor of the present patent for a fuel tank of a Volvo truck;

FIGURE 12., which shows the perspective view of the vent protector, fuel return line and fuel level sensor of the present patent for a fuel tank from the Mercedes Benz truck;

FIGURE 13., which shows the perspective view of the plug protector and tank transfer line of the present patent for fuel tank;

FIGURE 14., which shows a frontal cut view of the first option of a protector for a small fuel filler for fuel feeding, of the present patent, assembled in the current fuel filler in a original tank of a truck;

FIGURE 15., which shows a side cut view of the first option of a protector for a small fuel filler for fuel feeding, of the present patent, assembled in the current fuel filler in the original tank of a truck;

FIGURE 16., which shows a top view from the first option of a protector for a small fiiel filler for fuel feeding, of the present patent, assembled in the current fiiel filler of the original tank of a truck;

FIGURE 17., which shows the frontal view of the first option for the protector of vent, fuel return line and fuel level sensor of the present patent in a original fuel tank;

FIGURE 18., which shows the side view of the first option for the protector of vent, fuel return line and fuel level sensor of the present patent in a original fuel tank;

FIGURE 19., which shows the exploded frontal perspective view of the second alternative for a protector of fuel feeding fuel filler of the present patent, showing only the chicane;

FIGURE 20., which shows the exploded frontal perspective view of the second alternative for a protector of fuel feeding fuel filler of the present patent, showing the chicane complemented by external fuel cap for small original fuel filler;

FIGURE 21., which shows the perspective cut view of the second alternative for a protector of fuel feeding fuel filler of the present patent for small original fuel filler;

FIGURE 22., which shows the exploded frontal perspective view of the second alternative for a protector of fuel feeding fuel filler of the present patent, showing the chicane complemented by external fuel cap for large original fuel filler;

FIGURE 23., which shows the perspective cut view of the second alternative for a protector of fuel feeding fuel filler of the present patent for large original fuel filler;

FIGURE 24., which shows the perspective cut view of the second alternative for a protector of fuel feeding fuel filler of the present patent, showing only the chicane in the option with helical spring;

FIGURE 25., which shows the frontal cut view of the assembly of the second alternative for a protector of fuel feeding fuel filler of the present patent on a small original fuel filler;

FIGURE 26., which shows the frontal cut view of the assembly of the second alternative for a protector of fuel feeding fuel filler of the present patent on a large original fuel filler;

FIGURE 27., which shows in perspective view, the contact tube installed in the device for reducing the diameter, thus forming the sensor for measuring the capacitance;

FIGURE 28., which shows in perspective view, the contact tube without a tear in the side; and

FIGURE 29., which shows in perspective view, the contact tube with a tear in the side.

According to the figures 1 to 13 the preferred embodiment of the present patent is a kit for protection against theft of fuel comprising protector (1), of the current fuel filler (B) original and conventional, endowed with cap fuel filler (1-A), showed in figures 1 to 8, in a cylindrical form, with internal thread with diameter and height variables in function of the diameter and of the height of the current fuel filler (B) or with another conventional means of fitting, consolidated to the fuel cap of the fuel filler (1-B) and connectable by threading or another conventional mean to the tank covers (T); fuel cap of the fuel filler (1-B) of cylindrical format, endowed with of top cover in form of a ring with vent holes (1-B-l), with one to four orifices (l-B-2) in the shell, of nuts (l-B-3) consolidated in the internal shell of the fuel filler's fuel cap (1-B), of ring (1- B-4) consolidated in the internal shell and of fixation glove (l-B-5) consolidated to the ring (l-B-4) and threaded or fitted by other means in the internal top shell of the current fuel filler (B) and consolidated to the guide tube (1-C-l) of the extending tube with cage (1-C); extending tube with cage (1-C) endowed with of guide tube (1-C-l) at the top, cylindrical form, of inner diameter a little larger than the outer diameter of the filler nozzle, of sealing ring (l-C-2) consolidated in the shell of guide tube (1-C-l), limiting pin (l-C-3) in the bottom diameter of guide tube (1-C-l) or over the cage (1- C-4) constituted of helical or conventional spiral spring with angle from 0 to 15 degrees related to the vertical and with return (1-C-4-A) from the bottom to the center and consolidated to the fuel filler's fuel cap (1-B); gasket ring (1-D), with cylindrical form with top face (1-D-l) in a ring format and endowed with a projection for sealing (1-D-l-A) and with one to four undercuts (l-D-2) in shell positioned in the top face of the fuel filler (B); and from one to four screws (1-E) machined in the neck for breaking of the head at the end of the course by the application of torque, screwed in the nuts (1- B-3) and nailed in the shell of the fuel filler (B).

According to the figures 9 to 12, the kit for protection against theft of the present patent is constituted by protector of vent, of return and of fuel level sensor (2) endowed with of body (2-A) in a compatible format with the shell of the tank (T) with protuberances (2-A-l) in a quantity and form compatible with the external assembly of the vent, return and fuel level sensor (P) existing in the tank (T), with one or more undercuts (2-A-2) for fitting of the tank belts and with cut (2-A-3) expandable to one of the protuberances (2-A-l), when necessary for passing of the hoses and connections of the tank (T).

According to the figure 13, the kit for protection against theft of the present patent is constituted by protector of cap screw and fuel transfer cock (3) endowed with of body (3 -A) in a form compatible with the bottom shell of the tank (T) with protuberances (3 -A-I) in a quantity and form compatible with the external assembly of the protector of cap screw and fuel transfer cock already existing in the tank (T) and with one or more undercuts (3-A-2) for passing of the tank (T) belts.

In the case of using the pieces of the kit from the present patent, the fuel supply is done just as the conventional method, placing the filler nozzle inside the cover fuel filler (1-A) and the guide tube (1-C-l), occurring passing of the fuel through the interior of guide tube (1-C-l) and through the cage (l-C-4) getting out by the empty spaces of the cage (l-C-4).

The sealing ring (1-D) has function of sealing the current fuel filler (B) with the protector (1), avoiding leak of the fuel, of guide the positioning of the nuts (l-B-3) in the assembling and to assist the final function of the screws (1-E) avoiding vibration of the whole set and consequent loosening of protector (1).

According to the figures 14 to 16, the first option for protector of the fuel filler (B) for fuel feeding according to the present patent is constituted of complementary fuel filler (11) for fitting of smaller cap, through packing (H-A) endowed with flange (11 -A-I) positioned at the top, top cup (ll-A-2) of cylindrical form, consolidated to the flange (11-A-l), to the lodging tube (1 l-A-3) and to the three connection plates (ll-A-4), auxiliary cup (l l-A-7) of cylindrical form with two smaller rectangular orifices (ll-A-7- A) and with two larger rectangular orifices (11- A-7-B) at the top and with bottom cap (11-A-7-C) of an annular form, tube for lodging of the filler nozzle (1 l-A-3) of circular section and consolidated to the cap (11-A-7-C), three connection plates (ll-A-4) of rectangular prismatic form and consolidated to the bottom cup (ll-A-5) and to the lodging tube (ll-A-3), bottom cup (ll-A-5) in cylindrical form with bottom cap (11-A-5-A), consolidated to the three connection plates (ll-A-4) and to the case (11-A-6-A) and having grooves (11-A-5-B), joint cross (ll-A-6) endowed with a case (11-A-6-A) screwed and consolidated to the cap (11-A- 5-A), of cube (11-A-6-B) with internal thread for threading of the case (ll- A-6- A) and consolidated to four triggers (11-A-6-C) which contains lodging with spring (11-A-6-C-1) and pin with rod (11-A-6-C-2).

In case of using the fuel filler (11) complementary to the fuel filler (B), the fuel supply is done just as the conventional method, placing the filler nozzle inside the fuel filler (11), occurring the passage of the fuel through the interior of the tube (ll-A-3), through the interior of the cup (1 l-A-5), getting out through the grooves (11- A-5-B) and from these through the gap between outer diameter of the bottom cup (ll-A-5) and the inner diameter of the fuel filler (B). In case of overflow the bottom cup (ll-A-5), the fuel will pass through the top border of the referred cup.

According to the figures 17 and 18, the first option of protector of vent, of fuel return line and of fuel level sensor from the present patent is constituted of a special lodging formed by horizontal plate (12), two vertical plates (13) in which two tubes (14) are connected for protection of the hoses (M) for input and output of the fuel level sensor (P) and protective plate (15) for closing of the special lodging and affixed by screws (16) and by nuts (17) and by steel cables (18) passing by the orifices (16- A) of the screws (16) and involving the plate (15), united by seals (19) with seriated numbers and with numbers chosen by the owner of the vehicle, of high mechanical resistance to shear and traction.

According to the figures 19 to 26 the second alternative of fuel filler (B) for fuel feeding of the present patent is constituted of cylindrical chicane (IC) endowed with body (21) of cylindrical form internally threaded and with vent holes (RE) for output of the air from the tank when supplying, of vent holes (RE) positioned soon after the thread, of fixation ring (22), of guide tube (23) for reduction of the diameter of the fuel filler when compared to the existing marketed fuel fillers in order to prevent the easy access to the interior of the tank, besides guiding the filler nozzle, of difruser rings (24) with central hole to release a larger fuel flow and to prevent the passing of hoses by the lateral and fixed by the fixation rods (25), of fixation rods (25) of circular or polygonal section, fixed in the bottom flange (26) and in the guide tube (23), of bottom flange (26) for distribution of the fuel flow and closing of the device against the passing, into the tank, of hoses or tubes for fuel draining and in blind form or with small orifices, and of fixation joint cross (27) endowed with case (27-A) consolidated to the bottom flange (26), of rod (27-B) with internal thread for screwing of the case or screw (27-A) and consolidated to two triggers (27 -C) which contains lodging with spring (27-C-l) and pin with rod (27-C-2); of external fuel cap (28) of a cylindrical form, consolidated in the fixation ring (29) and involving the chicane (IC); and of gasket ring (AV) in a form compatible with the form of the fuel filler (B).

For the fuel fillers (B) for tank of large diameter, the external fuel cap (28) will have a stepping (28-A) with a diameter compatible with the outer diameter of the fuel filler (B) and alternatively the diffuser rings (24) can be replaced by helical spring for both small and large fuel fillers.

The cylindrical chicane (IC) with threaded fuel filler is assembled over the fuel filler (B) existing in the consumer fuel tank; this chicane (IC) with threaded fuel filler will be fixed in the fuel filler of the tank (B) by a joint cross (27) and its external structure will depend on the fuel filler of the tank in which it will be fixed, as showed in the figures 25 and 26; to prevent fuel leak and to give more sealing effect, the original fuel filler (B) of the tank (T) will be hampered by the gasket ring (AV); depending on the type of the fuel filler that the tank has, the assembling of the new fuel filler could double the height between foot of the fuel filler of the tank (B).

The sensor of the present patent operates as a monitoring sensor of the fuel filler tank, connected to systems for satellite tracking of vehicles, or integrated with the electronic system installed in the vehicle. The importance of such monitoring is to inhibit unauthorized removals of fuel from the consumer tank, also to monitor the fuel supplies of the vehicle, providing the identification of the place and time where the supply of consumer fuel happened. It permits to know when any product is inserted into the fuel filler, for example, the filler nozzle, that can only be inserted through the guide tube (1-C-l) of the protector (1) or through the device for reducing the diameter (DR). The sensor, object of this patent application, operates as capacitance gauge, which through an electronic circuit, monitors the dielectric region existing inside the contact tube.

According to figures 27 to 29, the sensor for capacitance measurement (SMC) is constituted by a reducing and receiver tube (TRR) with ring (AF) or guide tube (1-C-l) of the protector (1), assembled in a conventional fuel filler, containing internally and concentrically a contact tube (TC) endowed with an external diameter very close to the internal diameter of the reducing and receiver tube (TRR) or of the guide tube (1-C-l) of the protector (1), endowed with small thickness, enough to make possible the creation of a dielectric region (RD) in its interior and in the device for reducing the diameter (DR), endowed or not with a tear in the side (RL), and endowed with a protective surface with an insulator material, which can be a glue layer of extremely high mechanical resistance and of high resistance against the attack of chemical products used to fix the contact tube (TC) in the reducing and receiver tube (TRR) or in the guide tube (1-C-l); the sensor for capacitance measurement (SMC) is also constituted by a contact wiring (FTC) connected to the contact tube (TC), a contact wiring (FDR) connected to the reducing and receiver tube (TRR) or to the guide tube (1-C-l), and a device for capacitance variation measurement (MVC) endowed with an electronic circuit which is conected at the contact tube (TC) through the contact wiring (FTC) and is conected at the reducing and receiving tube (TRR) or from the guide tube (1-C-l) of the protector (1) through the contact wiring (FDR); the device for capacitance variation measurement (MVC); receive electrical current of 12V to 32V and send positive signal of 12V; and if a variation in the electrodes is detected, the monitoring system stops and calibrates a trigger placed inside the circuit.

The contact tube (TC) can be made of aluminum, carbon steel, or other conductive material, has its dimension calculated in such way that can creates the necessary area of capacitance to a perfect working, according to the internal diameter of the reducing and receiver tube (TRR) or to the guide tube (1-C-l) of the protector (1) where it will be installed, to the thickness of the protective surface of the contact tube (TC), and to the working tension. The internal diameter of contact tube (TC) is such that will make possible only the passage of the most common filler nozzles, whose external diameter is at most of 30mm. When the contact tube (TC) is assembled in the reducing and receiver tube (TRR) or in the guide tube (1-C-l) of the protector (1), this whole set will be the sensor for capacitance measurement (SMC). The sensor for capacitance measurement (SMC) operates through a small electronic system, whose installation will be in the interior of the instrumental panel of the vehicle. The electronic circuit calibrates a trigger placed inside the circuit, whose function is to adjust the sensibility of the sensor for capacitance measurement (SMC) in such way that the electronic circuit does not emit a signal to the tracking system as soon as a variation in the dielectric field happens, on the contrary, it will emit the signal only when that variation in the dielectric region (RD) - which happens when any object is introduced into the tank - remains for a determined period of time - the time will be specified in the calibration of the electronic circuit - for example, after 10 seconds. The specification of the period of time is important to avoid that the shaking of the fuel inside the tank caused by the movement of the vehicle, activates the sensor every time that the fuel pass through the dielectric region (RD), which is placed inside the contact tube (TC). On the other hand, the diameter reduction caused by the reducing and receiver tube (TRR) or by the guide tube (1-C-l) of the protector (1) also decreases substantially the possibilities of the fuel to reach the dielectric region (RD).

The device for reducing the diameter (DR) can be made in different sizes especially concerning the fixing ring (AF) to satisfy the various fuel fillers models available today.

Claims

1. "DEVICES AGAINST THEFT OF

CONSUMER FUEL FROM VEHICULAR TANKS", characterized by, protector (1), of the current fuel filler (B) original and conventional, endowed with cover fuel filler (1-A), of cylindrical form, with internal thread with diameter and height variables in function of the diameter and of the height of the current fiiel filler (B) or with another conventional means of fitting, consolidated to the fuel cap of the fuel filler (1-B) and connectable by threading or another conventional mean to the tank covers (T); fuel cap of the fiiel filler (1-B) of cylindrical format, endowed with of top cover in form of a ring with vent holes (1-B-l), with one to four orifices (l-B-2) in shell, of nuts (l-B-3) consolidated in the internal shell of the fiiel filler's fuel cap (1- B), of ring (l-B-4) consolidated in the internal shell and of fixation glove (1- B-5) consolidated to the ring (l-B-4) and threaded or fitted by other means in the internal top shell of the current fuel filler (B) and consolidated to the guide tube (1-C-l) of the extending tube with cage (1-C); Extending tube with cage (1-C) endowed with of guide tube (1-C-l) at the top, in cylindrical form, of inner diameter a little larger than the outer diameter of the tip of the supply pistol, of sealing ring (l-C-2) consolidated in the shell of guide tube (1-C-l), limiting pin (l-C-3) in the bottom diameter of guide tube (1-C-l) and of cage (l-C-4) constituted of helical or conventional spiral spring with angle from 0 to 15 degrees related to the vertical and with return (l-C-4- A) from the bottom to the center and consolidated to the fiiel filler's fuel cap (1- B); gasket ring (1-D), in cylindrical form with top face (1-D-l) in a ring format and endowed with of projection for gasket (1-D-l-A) and with one to four undercuts (l-D-2) in shell positioned in the top face of the fuel filler (B); and from one to four screws (1-A) machined in the neck for breaking of the head at the end of the course by the application of torque, screwed in the nuts (l-B-3) and nailed in the shell of the fuel filler (B); protector of vent, of fuel return line and of fuel level sensor (2) endowed with of body (2-A) in a forn compatible format with the shell of the tank (T) with protuberances (2- A-I) in a quantity and form compatible with the external assembly of the vent, return and fuel level sensor (P) existing in the tank (T), with one or more undercuts (2-A-2) for fitting of the tank belts and with cut (2-A-3) expandable to one of the protuberances (2-A-l), when necessary for passing of the hoses and connections of the tank (T); protector of cap screw and fuel transfer cock (3) endowed with body (3-A) in a form compatible with the bottom shell of the tank (T) with protuberances (3-A-l) in a quantity and form compatible with the external assembly of the protector of cap screw and fuel transfer cock already existing in the tank (T) and with one or more undercuts (3-A-2) for passing of the tank (T) belts; and the sensor for capacitance measurement (SMC) is constituted by a reducing and receiver tube (TRR) with ring (AF) or guide tube (1-C-l) of the protector (1), assembled in a conventional fuel filler, containing internally and concentrically a contact tube (TC) endowed with an external diameter very close to the internal diameter of the reducing and receiver tube (TRR) or of the guide tube (1-C-l) of the protector (1), endowed with small thickness, enough to make possible the creation of a dielectric region (RD) in its interior and in the device for reducing the diameter (DR), endowed or not with a tear in the side (RL), and endowed with a protective surface with an insulator material, which can be a glue layer of extremely high mechanical resistance and of high resistance against the attack of chemical products used to fix the contact tube (TC) in the reducing and receiver tube (TRR) or in the guide tube (1-C-l); the sensor for capacitance measurement (SMC) is also constituted by a contact wiring (FTC) connected to the contact tube (TC), a contact wiring (FDR) connected to the reducing and receiver tube (TRR) or to the guide tube (1-C-l), and a device for capacitance variation measurement (MVC) endowed with an electronic circuit which is connected at the contact tube (TC) through the contact wiring (FTC) and is connected at the reducing and receiving tube (TRR) or from the guide tube (1-C-l) of the protector (1) through the contact wiring (FDR); the device for capacitance variation measurement (MVC); receive electrical current of 12V to 32V and send positive signal of 12V; and if a variation in the electrodes is detected, the monitoring system stops and calibrates a trigger placed inside the circuit.

2. "DEVICES AGAINST THEFT OF

CONSUMER FUEL FROM VEHICULAR TANKS", according to claim 1, characterized by, alternatively adopting protector of the fuel filler (B) for fuel feeding constituted of complementary fuel filler (11) for fitting of smaller cover, through packing (H-A) endowed with of flange (11-A-l) positioned at the top, top cup (ll-A-2) in a cylindrical form, consolidated to the flange (11-A-l), to the lodging tube (1 l-A-3) and to the three connection plates (ll-A-4), auxiliary cup (ll-A-7) in cylindrical form with two smaller rectangular orifices (11-A-7-A) and with two larger rectangular orifices (11- A-7-B) at the top and with bottom cover (11-A-7-C) in an annular form, tube for lodging of the filler nozzle (1 l-A-3) of circular section and consolidated to the cover (11-A-7-C), three connection plates (ll-A-4) in rectangular prismatic form and consolidated to the bottom cup (ll-A-5) and to the lodging tube (1 l-A-3), bottom cup (ll-A-5) in cylindrical form with bottom cover (11-A-5-A), consolidated to the three connection plates (ll-A-4) and to the case (11-A-6-A) and having grooves (11-A-5-B), joint cross (ll-A-6) endowed with case (11-A-6-A) screwed and consolidated the cover (ll-A-5- A), of cube (11-A-6-B) with internal thread for threading of the case (11 -A- 6-A) and consolidated to four triggers (11-A-6-C) which contains lodging with spring (11-A-6-C-1) and pin with stem (11-A-6-C-2).

3. "DEVICES AGAINST THEFT OF CONSUMER FUEL FROM VEHICULAR TANKS", according to claim 1, characterized by, alternatively adopting protector of vent, of fuel return line and of fuel level sensor constituted of a special lodging formed by horizontal plate (12), two vertical plates (13) in which two tubes (14) are connected for protection of the hoses (M) for input and output of the fuel level sensor (P) and protective plate (15) for closing of the special lodging and fastened by screws (16) and by nuts (17) and by steel cables (18) passing by the orifices (16-A) of the screws (16) and involving the plate (15), united by seals (19) with seriated numbers and with numbers chosen by the owner of the vehicle, of high mechanical resistance to shear and traction.

4. "DEVICES AGAINST THEFT OF CONSUMER FUEL FROM VEHICULAR TANKS", according to claim 1, characterized by, alternatively adopting protector of the feeding fuel filler with cylindrical chicane (IC) endowed with body (21) in an internally threaded cylindrical form and with vent holes (RE), positioned soon after the thread, of fixation ring (22), of guide tube (23), of diffuser rings (24) with central hole and fixed by the fixation stems (25), of fixation stems (25) of circular or polygonal section, fixed in the bottom flange (26) and in the guide tube (23), of bottom flange (26) in blind form or with small orifices, and of fixation joint cross (27) endowed with case (27-A) consolidated to the bottom flange (26), of stem (27-B) with internal thread for screwing of the case or screw (27 '-A) and consolidated to two triggers (27-C) which contains lodging with spring (27-C-l) and pin with stem (27-C-2); of external fuel cap (28) in a cylindrical form, consolidated in the fixation ring (29) and involving the chicane (IC); and of gasket ring (AV) in a form compatible with the form of the fuel filler (B).

5. "DEVICES AGAINST THEFT OF

CONSUMER FUEL FROM VEHICULAR TANKS", according to claim 4, characterized by, alternatively adopting, for the fuel fillers (B) for tank of large diameter the external fuel cap (28) with a stepping (28-A) with a diameter compatible with the outer diameter of the fuel filler (B) and alternatively the difruser rings (24) being replaced by helical spring for both small and large fuel fillers.