RU2296069C2 - Antitheft device - Google Patents

Abstract

FIELD: transport engineering; antitheft devices.

SUBSTANCE: proposed device can be installed on diesel engine high-pressure pump magnetic valve as protective interlock. Device has element covering and enclosing magnetic valve and secured on body of high-pressure pump. Said element can be detachably connected with body of high-pressure fuel pump by screws whose geometric closing surfaces can be turned only in direction of turning on and are made with possibility of removal. Said element is made in form of solid breakproof armored cap with holes for fasteners, electric wire and locking screw. Armored cap has no parts projecting from body of high-pressure fuel pump. Locking screw is installed in armored cap for locking of armored cap relative to magnetic valve.

EFFECT: improved reliability of protection.

3 cl, 4 dwg

Description

The invention relates to anti-theft devices and can be installed as a protective blocking of the magnetic valve of the high pressure fuel pump on diesel engines.

An anti-theft device is known in which a simple protective casing is provided, which is a lid covering an electrical circuit, including a magnetic valve on a high pressure fuel pump. The casing and the threaded connection connecting it to the fuel pump are thus positioned so that after installing the fuel pump, access to the threaded connection is blocked (RU 210676 C2, class B 60 R 25/04, from 12.20.2000). Only after removing the pump can you unscrew the casing to gain access to the solenoid valve. The indicated magnetic valves on the fuel pumps are used to block the fuel supply to the working cavities of the pump when the diesel engine is off. Before starting the engine, such a magnetic valve must be opened and the valve is opened using an electric control device, part of which is located inside the casing. To start the engine, for example, when trying to steal, it would be necessary to carry out certain manipulations with the magnetic valve. However, the electric circuit located under the casing does not allow to freely manipulate the magnetic valve from the outside of the casing. Using secret codes and other security measures, electrical access to the solenoid valve is blocked. But the performance of the magnetic valve can be impaired by mechanical intervention, bringing it in any way to the open position. Thus, it would be possible to steal a vehicle on which such a diesel engine is installed.

The closest analogue is an anti-theft device for protection against unauthorized access to the magnetic valve of the high-pressure fuel pump with a closing element that covers the magnetic valve and is fixed to the magnetic valve of the high-pressure fuel pump, which can be detachably connected to the housing of the high-pressure fuel pump using fasteners in the form of screws, geometrical closure surfaces of which can be rotated only in the direction of screwing and are made with the possibility of removing Iya (RF Patent No. 2164424 dated 06/10/2001).

A disadvantage of the known device is the low degree of reliability of protection due to the fact that it consists of components (base with bottom part, cover and connecting elements). This does not protect the magnetic valve from unauthorized access due to mechanical destruction of parts of the device, for example using a percussion instrument.

An object of the invention is to increase the degree of reliability of protection.

The solution to this problem is achieved by the fact that the anti-theft device to protect against unauthorized access to the magnetic valve of the high pressure fuel pump with a closing element that covers the solenoid valve and is mounted on the high pressure fuel pump casing, which can be detachably connected to the high pressure fuel pump casing using fasteners in the form of screws, the surfaces of the geometric closure of which can only be rotated in the direction of screwing and are made with can be removed, while the element is made in the form of a monolithic, burglar-proof, armored cap with holes for fasteners, an electric wire and a screw retainer, and the armored cap does not have parts protruding beyond the high-pressure fuel pump housing, according to the invention, the retainer screw is installed in the cap with the possibility of locking on the magnetic valve of the cap. In addition, threaded holes made on the housing of the high pressure fuel pump for fixing its parts are used as threaded holes for screws. In addition, the screws are made of hardened steel with conical heads.

The installation of retainer-screws in the cap with the possibility of locking on the magnetic valve of the cap in case of opening the cap allows you to additionally fix the cap after removing the main screws. The use of mounting holes of the high-pressure fuel pump housing itself for fixing the armored cap increases the manufacturability of mounting and reliability of mounting (additional holes weaken the high-pressure fuel pump housing, adversely affect the reliability of the anti-theft device). The connection of the armored cap with screws made of hardened steel with conical heads does not allow opening the device by drilling or unscrewing with a tap for the left thread. This is due to the slipping of tools on a conical surface.

The invention is illustrated by drawings.

Figure 1 shows a General view of the armored cap, a view from the side of the device to the housing of the high pressure fuel pump.

Figure 2 is the same side view.

Figure 3 is the same view from the side of the installation surface of the device on the housing of the high pressure fuel pump.

Figure 4 shows a General view of the screw.

The anti-theft device contains a monolithic armored hood with rectangular flat left wall 1, right wall 2, front wall 3, rear wall 4 and upper part 5. In the rear wall 4 there are two holes 6 into which the screws are installed (see figure 4) for mounting hardware to the high pressure fuel pump. Holes 6 have slots 7 for screw heads. The screws are made of hardened steel. The armored hood is made by milling from a monolithic block of metal with subsequent processing in a known manner. However, it does not have parts protruding beyond the high pressure fuel pump housing. A threaded hole 8 is made in the right wall 2. A hole 9 is made in the left wall 1 (for an electric wire ensuring the operability of the magnetic valve). All walls form a cavity 10 in which a solenoid valve of known design is placed. A locking screw 11 is screwed into the threaded hole 8, which extends beyond the back of the magnetic valve 12 (see FIG. 3). The shape of the walls and the upper part allows you to cover the space around the solenoid valve 12 and copies the mating surfaces of the parts of the housing of the high pressure fuel pump. The screws consist of a cylindrical part 13 with a thread, the surface of the geometric circuit is made in the form of a hexagon 14 and a conical head 15.

The anti-theft device operates as follows.

The armored cap by means of the front wall 3 is installed on the housing of the high pressure fuel pump and fixed with screws (using threaded holes made on the housing of the high pressure fuel pump for fixing its parts), after which the hexagons 14 break off. At the same time, conical heads 15 remain in the sockets 7, the surface of which excludes the use of hacking tools. After installing the armored cap on the high-pressure fuel pump and screwing in the screws, screw into the threaded hole 8 a screw 11, which enters the back of the magnetic valve 12 (see Fig. 3), additionally fixes the device and does not allow removing the armored cap from the fuel pump high pressure after unauthorized removal of conical head screws 15.

Thanks to the design and material of the monolithic armored cap, the degree of protection against unauthorized access to the magnetic valve is increased. However, it is impossible to use well-known hacking tool designs. The armored body is difficult to cut and has a high impact strength. Due to the presence of such an anti-theft device, an attacker needs considerable time to gain access to the magnetic valve. This time should be considered as an envisaged measure of protection against theft of a vehicle. Due to the placement of the safety circuit of the known operating principle and design in the cavity 10, it is also impossible to manipulate the wires and the magnetic valve without destroying the anti-theft device. In this case, through the use of appropriate secret codes, access to the magnetic valve is reliably blocked.

Unlike analogues, this design of the anti-theft device has an increased degree of protection reliability, is reliable in operation during long-term operation due to the simplicity of design and inseparability, and is technologically advanced to manufacture.

Claims (3)

1. An anti-theft device for protection against unauthorized access to the magnetic valve of the high-pressure fuel pump, with an element that covers and covers the magnetic valve and is mounted on the housing of the high-pressure fuel pump and can be detachably connected to the housing of the high-pressure fuel pump using fasteners in the form of screws, the geometrical closure surfaces of which can be rotated only in the direction of screwing and are made with the possibility of removal, while the element is made it is in the form of a monolithic, burglar-proof, armored cap with holes for fasteners, an electric wire and a screw clamp, and the armored cap does not have parts protruding beyond the high-pressure fuel pump housing, characterized in that the screw clamp is installed in the armored cap with the possibility of locking on the magnetic valve of the armored cap. 2. The anti-theft device according to claim 1, characterized in that threaded holes made on the housing of the high-pressure fuel pump for fixing its parts are used as threaded holes for screws. 3. The anti-theft device according to claim 2, characterized in that the screws are made of hardened steel with conical heads.

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