WO1994013514A1

WO1994013514A1 - Theft prevention device affecting distribution in a diesel or internal combustion engine

Info

Publication number: WO1994013514A1
Application number: PCT/FR1993/001209
Authority: WO
Inventors: Jean-Claude Kaskoreff
Original assignee: Kaskoreff Jean Claude
Priority date: 1992-12-09
Filing date: 1993-12-08
Publication date: 1994-06-23
Also published as: FR2698835A1

Abstract

A theft prevention device essentially consisting of lock members (1) for preventing closure of the valves (4) in diesel and internal combustion engines. Means (6, 7) for operating the lock members (1) and control means (11, 12, 13) therefor are also disclosed. The device is made tamper-proof by a reinforced enclosure (36) and an auxiliary deterrent device (40), and may be used in motor vehicles, motorcycles and agricultural or industrial equipment.

Description

ANTITHEFT DEVICE INTERVENING IN THE DISTRIBUTION OF EXPLOSION ENGINES AND DIESEL ENGINES.

Theft-deterrent systems for vehicles fitted with internal combustion and diesel engines are increasingly using electronics, see patent no. 2,592,347 of the national control center of Renault factories, with coded systems, see patent no. 2,607,611 filed by Neiman SA, by remote control by radio or infrared network, see patent n ° 2624076 filed by Cristian Faure and are more and more reliable and sophisticated

This does not prevent car thefts from increasing in percentage each year because these systems, however sophisticated they are, act on organs that are too easily accessible, short-circuitable or bypassed by criminals, whether they are a coil, an igniter, a pump and more generally an electrical or fuel supply circuit. These cir ^¬ cuits are too easily accessible because they are all located outside the engine, hence the advantage of an anti-theft device such as that which is the object of the present invention and which makes it possible to prohibit the operation of the engine by acting on parts located inside it.

The anti-theft device according to the invention makes it possible to hinder the closing of the valves and consequently, to prevent the compression in the cylinder from reaching a rate sufficient for the engine to operate. Other protective and deterrent provisions , annexes to the invention, are provided so that only an authorized user can hinder and restore at will the free play of the valves ¹ , while having a usable vehicle.

The device according to the invention acts downstream of the camshaft. It includes a so-called lock piece, mounted on a support generally fixed to the tire or possibly on the valve cover or what takes its place, and near a so-called interceptable piece. It can be a valve stem or a surrounding accessory linked to it such as a valve spring, or a socket for example, or a part acting directly or indirectly on the valve stem such as a tappet or rocker arm. According to other modes of application of the invention, the cylinder head itself or the valve cover can be shaped so as to act as a bolt support.

The simple idea which is at the origin of the invention is to take advantage of the moment or the valve opens under the direct or indirect action of the camshaft to arrange the lock so that when the cam does will act more, the valve pushed by its return spring will close, but only up to a certain point, the lock having been positioned in the meantime on the path of all or part of the surface of the part known as inter¬ ceptable. It is necessary that the level of the bolt on its support is calculated so that the closing of the valve is sufficiently hampered so that the compression ratio in the cylinder cannot reach the threshold allowing to produce an explosion. The anti-theft device according to the invention is then in service.

If one intervenes on the bolt to put it away from the path of the interceptable part, the valve can again close correctly and the explosion takes place in the cylinder, the anti-theft device according to the invention is then in out of service position.

It is possible to envisage different forms of locks and according to these forms, the lock can act by rotation, tilting, translation or in any other way making it possible to obtain, either its intervention on the path of a part or of the the entire interceptable part, that is to say its separation.

We can act on the lock using both manual and mechanical means, for example, a key that we turn in a barrel and which applies directly or indirectly to the lock the movement which is usually transmitted to the bolt on a conventional lock.

This kind of device can be applied without disadvantage on a motorcycle for example for the very simple reason that there is no need to open the hood to access the engine, but in most cases, and in particular in Regarding motor vehicles, we will choose from the vast panoply offered by modern techniques of the most appropriate means, whether they are mechanical (springs, ect), magnetic (magnets), electromagnetic (electromagnets), hydraumechanical (electrovalves, rods) , ect), pneumatic or others to act on the bolt.

One thing is to be taken into account for the realization of the installations. When the anti-theft device is put into service, the so-called interceptable part can be in the location that the bolt must occupy to prevent the valve from closing completely. After the anti-theft device has been put into service, it is therefore necessary that the lock can, if necessary, remain in the waiting position until the interceptable part frees the location under direct or indirect pressure from the cam. . Later, we will see some illustrated examples of implementation of the invention which meet this need.

Our examples of implementation are inspired by two different kinds of systems, so-called automatic lock operating systems and so-called differentiable lock operating systems, from the verb differ which means to delay. We will give several examples of embodiments for each system, but the scope of the invention, the bases of which are contained in claim 1, may not be limited by these examples or by these lock control systems.

According to the preferred embodiment of the invention, an automatic organ or device (spring, simple magnet or other) exerts a permanent fozce on the latch so as to automatically place it on the path of part or all of the interceptable part, thus tending to carry out the automatic commissioning of the anti-theft device, while another member or device (electromagnet, jack, hydraulic or other) acts on command and, only on command, by exerting a force greater than that of the organ or of the automatic device, so as to completely move the lock out of the way of the interceptable part.

So if the means which acts only on command ceases its action, that which acts in permancy automatically tends to put the lock on the path of the interceptable part. Two cases can then occur, or the location is free and the reaction is immediate, or the location is occupied by the interceptable part and the lock will take place automatically as soon as it is released under the direct or indirect action of drug. An example of a system known as a maneuverredifferable lock consists of an assembly of rods, or connecting rods or any other sliding parts and springs which make it possible to control the intervention of the ver¬ rou on the path of the interceptable part or to spread it out of this path by delaying the movement when the interceptable part opposes it. We will see in the examples illustrated why this system is particularly interesting when the anti-theft maneuver is carried out by manual force, using a key on motorcycles, agricultural or industrial equipment. We will also see several evolutions of the system which allow it to be applied without direct intervention under the hood of an interior pipe for example.

In most cases, the authorized user must be able to manipulate the lock from the dashboard or at a distance from the vehicle by means of equipment allowing an exclusive combination, whether it be a automatic or adjustable lock operation. More generally we will say a coded message transmitter which advantageously replaces the traditional key.

Sophisticated systems have been known for a few years which allow the authorized user and in principle alone to interrupt and restore at will the electric current under the hood from the dashboard or outside the vehicle.

The authorized user has an equipment component or containing coded messages, associated with means of transmission of messages by cable or by wave. Means for receiving, analyzing and processing coded messages are grouped together on a current supply and make it possible to interrupt and restore the electric current at will, or to reproduce control signals on condition that there is recognition of a coded message. These means of reception, analysis and processing of messages together form what we can group together under the term of anti-theft switch. Certain applications will require the use of a motor, generally electric, located downstream of the anti-theft switch, but more often than not, it will be sufficient for the anti-theft switch to deliver an electric current necessary for the operation of an electromagnet, or of a solenoid valve connected to a hydraulic circuit. The strength of the bolt and its support must be calculated so as to withstand the direct or indirect pressure of the valve return spring. We will have as many locks on as many interceptable parts as we deem necessary, most often we will equip one cylinder out of two but in this case, it is recommended on an engine comprising for example "s qquuaattrree ccyylliinnddrree / to select two cylinders which follow in order of the explosions.

It is also recommended to install a manual blocking system in the anti-theft anti-theft position on each lock, directly or upstream so as to be able to use the engine in the event of the anti-theft device failing because, according to certain preferred mode. the invention, the anti-theft device would automatically move into the service position. A targette, a screw or a notched system (not shown in the drawings) will most often be sufficient.

To be reliable, the device according to the invention must itself be protected against the intrusion of unauthorized users. According to a preferred embodiment of the invention, a shielded enclosure most often serving as a valve cover includes the bolt with its support and theoretically all of the distribution located downstream? in practice, the bolt with its support, the camshaft and all the part of the distribution located downstream, the receiver of coded messages, the anti-theft switch, some or all of the mechanical devices, electric, magné¬ ticks, electromagnétiqueset.ou, others, arranged between the anti-theft switch and the latch.

The elements which form the receiver as well as the anti-theft switch are preferably grouped together inside an optional box, isolated from the atmosphere of the rest of the shielded enclosure, although located inside and benefiting from its solidity against intrusion. The sealing zones which are most important in this case are those which make it possible to isolate the terminal elements of fragile, electronic or other apparatus which form the anti-theft switch, from the hot, oily and humid atmosphere which reigns in the environment of the distribution system. This isolation being well ensured, there is no disadvantage in opening slots or vent holes towards the outside of the box provided that there are shielded baffles preventing passage or direct communications between the outside and the inside of the box.

Beyond these generalities of application, the shielded enclosure is distinguished by its fixing system and its rigidity. The shielded enclosure according to the invention has the particularity of being fixed on one or more supports called deterrent anchors. It is not held from the outside by nuts or a bolting system like any valve cover, it is locked inside using locks whose control mode, manual, mechanical, electrical, electronic, radio, infrared or other is left to the choice of the manufacturer. It has good resistance to chisels, its rigidity and the solidity of its locking system are such that one cannot force the opening from the outside, without tearing off the anchor or deterrent anchors on which it is locked.

The invention provides, in fact, a so-called deterrent device which renders the engine unusable if a criminal forces the armored enclosure. This device relates more particularly to modern engines whose cylinder heads are made of light and fragile alloys, such as cast aluminum. The breech made of fragile metal has one or more anchoring parts for the armored enclosure called deterrent anchors, made of a material whose strength is greater than that of the breech. Each deterrent anchor is exposed in a combustion chamber, crosses the cylinder head before being the support of a part of the locking system of the shielded enclosure, that is to say that each locking system consists of an active part (barrel, bolt or other) and a passive part (left or other) and it does not matter how these different homelands are distributed over the enclosure and over the deterrent anchor. A deterrent anchor and the entire locking system must be strong enough to tear in one piece with the shielded enclosure if an attempt is made to force its opening.

According to a preferred embodiment of the invention, a deterrent anchor comprises, at the end which is flush with the combustion chamber, a particular configuration, for example, one or more arms capable of being driven as a result of tearing sufficient breakage in the cylinder head to prevent explosions from occurring in the corresponding cylinder. An optional waterproof sleeve is used to isolate the coolant dissipation anchor in the cylinder head. A so-called tear-off disc, optional, relatively fragile compared to the cylinder head makes it possible to limit its deterioration in the event of tearing off of the deterrent anchor and thus to reduce repair costs. It encloses the arm of the deterrent anchor so that its breaking, in the event of detachment of the deterrent anchor, does not cause deterioration of the tire, but it causes sufficient deterioration of the combustion chamber, to prevent the explosion from taking place in the corresponding cylinder.

The deterrent anchor and the tear-off disc are preferably mounted from the combustion chamber, in the cylinder head which has been previously tapped and chamfered for this purpose. other methods of fixing the deterrent anchor to the culas¬ are possible ^ for example, the one shown in the

12 / figure or a nut screwed on 1 deterrent anchor keeps it in place.

The accompanying drawings illustrate the invention.

The examples which we give are in no way limiting as regards the modes of application of the invention, nor in equal terms concerns the detail of these modes of application.

For the sake of simplification and clarity of the drawings, we have shown only one valve per cylinder. In principle, this is the exhaust valve. For the sake of clarity, we have often oversized in the drawings the pieces forming part of the anti-theft device compared to those belonging to the distribution device. In practice, it will be advantageous to miniaturize everything relating to the anti-theft device. NOMENCLATURE

1 - Lock

2 - So-called interceptable part (valve stem, push rod, rocker arm or other). 3 - Cam or camshaft

4 - Valve

5 - Latch support (1)

6 - Organ or automatic device permanently acting on the bolt (1), spring, single magnet or other. 7 - Body or device acting only on command on that / the bolt (1) with a higher force exerted by the body or the automatic device (6 - Hydraulic bolt, electromagnet or other)

8 - Supply line for a jack (7) 9 - Discharge pipe for a hydraulic product outside the cylinder (7)

10 - Return spring of a valve (4)

11 - Device composing or containing coded messages

12 - Means for transmitting coded messages 13 - Anti-theft switch comprising means for receiving, analyzing and processing coded messages and making it possible to interrupt or restore an electric current, or to reproduce control signals.

14 - Control unit (only if necessary), motor, solenoid valve or other on automatic lock control device (1)

15 - Hydraulic pump

16 - Relief valve

17 - Hydraulic circuit 18 - Differential lock control key

19 - Lockable control cylinder

20 - Gear wheel

21 - So-called transmission part (rack, shaft or other) 22 - and 22 bis - So-called intermediate parts 23 - Position of the so-called transmission part close to the path of the interceptable part (2) Fig. 9

24 - Position of the so-called transmission part distant from the path of the interceptable part (2) Fig. 8 25 - Compression spring on a lockable dif¬ maneuvering device

26 - Sliding axis

27 - Oval eyecup

28 - Tension spring 29 - So-called coupling bar on the lock actuator

30 - Cam or eccentric wheel

31 - Springs returning the coupling rod (29) to the remote position 32 - Motor

33 - Cylindrical spring or spiral spring, with angular action

34 - (Optional) - Cylindrical spring or spiral spring with angular action in the opposite direction to the spring (33) 35 - Electric current arrival

36 - Shielded enclosure

37 and 38 - Active part (example: barrel (37) and movable bolt (38), of a system for fixing a shielded enclosure (36) situated either on the shielded enclosure (36), and at the inside or on its support (40)

39 - Passive part (for example a keeper), of a system for fixing a shielded enclosure (36) situated as desired on the shielded enclosure (36) and inside or on its support (40)

40 - Deterrent anchor 41 - Tear-off arm

42 - Pull-out tab

43 - Deterrent anchor fixing nut

44 - Cylinder head

45 - Configuration (tear-off arm or others), liable to cause a breakage of the cylinder head or of the pull-out disc (42) Figures 1, 2, 3 and 4 show more particularly the notorious position of a lock (1) according to nonlimiting examples, compared to a part called interceptable (2) depending on the circumstances and various situations.

In these examples, the interceptable part (2) is a rocker acting directly under the action of a cam (3) on a valve stem (4). The lock (1) slides along a support (5) on which it is fixed indirectly. An automatic means (6), here a compression spring, tends to constantly push the latch (1) on the path of the interceptable part (2). A device, here a hydraulic cylinder (7) whose power is greater than that of the spring (6) acts on command and only on command so as to move the lock (1) away from the ^* path of the interceptable part (2). The means for implementing the hydraulic cylinder (7) are not shown in this drawing. For this information, see figure 7.

Figure 1 shows a part of the anti-theft device while the assembly is out of service. Latch 1 is kept away from the path of the interceptable part

(2) under the pressure of the hydraulic cylinder (7). Each cylinder has a supply conduit (8) and an evacuation conduit (9). The fact that the diameter of the supply conduit (8) is much larger than that of the evacuation conduit (9) is sufficient, according to this example, to maintain in the jack (7), when it is supplied, a pressure more powerful than that produced by the spring (6).

Figure 2 shows part of the anti-theft device ready to enter service. A control member cut the supply to the hydraulic cylinder (7) upstream. The compression spring (6) pushes the latch (1) towards the path of the interceptable part (2) at the same time as the jack (7) begins to evacuate the liquid which it contains by the evacuation conduit ( 9). These operations are interrupted by the presence of the interceptable part (2) which obstructs the positioning of the lock (1) in the service position. In FIG. 3, the cam (3) intervenes here directly on the interceptable part (2) causing at the same time the opening of the valve (4) and the release of the location of the lock (1) on the trajectory. of the interceptable part (2). The permanent pressure of the compression spring (6) completes the evacuation of the liquid in the cylinder (7) and at the same time, the completion of the positioning of the lock (1) on the path of the interceptable part ( 2).

In Figure 4, the cam (3) ceases to act on the interceptable part (2). The valve (4) begins to close under the action of its return spring (10). But the closure will not end, the latch (1) being arranged so as to oppose the complete closure of the valve by means of the interceptable part (2), so that the remaining opening is sufficient to make explosion in the cylinder impossible.

Figures 5 and 6 show an example n-> n limiting embodiment comprising on the one hand, an automatic means (6), here a compression spring permanently exerting a thrust which tends to place the latch (1) on the path of a part of an interceptable part (2), here a pusher valve and on the other hand, a means acting on command and only on command (7), here an electromagnet whose power is greater than that of the spring (6). The anti-theft switch which supplies the current necessary for the operation of the electromagnet (7) is not shown in this drawing.

FIG. 5 represents the device in a configuration where the anti-theft switch authorizes the passage of the electric current which feeds the electromagnet (7). It should be noted in this exemplary embodiment that the trans¬ lation of the lock (1) is relatively low, which limits the distance which separates it from the electromagnet (7) and makes it possible for the attraction force of 1 'electromagnet (7) is easily greater than the compression force of the spring (6). L ¹ electromagnet ι7) therefore attracts the latch (1) outside the path of the interceptable part (2), here, a valve lifter. The anti-theft device according to the invention is then out of service and the engine can operate normally.

Figure 6 shows the same device as Figure 5 in a different configuration.

Here, the anti-theft switch which is not shown in this drawing prohibits the passage of the electric current which supplies the electromagnet (7), which becomes inactive. Nothing then opposes the thrust of the compression spring (6) which causes the automatic displacement of the lock (1) on the path of the interceptable part (2) as soon as the position is free. By comparing Figures 5 and 6, ^• we note that the valve (4) will no longer be able to close completely, the engine will no longer be able to start, the anti-theft device according to the invention is then in service.

Regardless of the fact that a single anti-theft switch ^• can deliver the current necessary for the operation of several electromagnets (7) for the control of several valves (4) on several cylinders, it should be noted that the number of springs (6 ), electromagnets (7) and therefore the locking device (1) on a single intercepted part (2) as shown in FIGS. 5 and 6, so as to better distribute the locking of an interceptable part ( 2.).

By slightly modifying the configuration of the device shown in FIGS. 5 and 6, it is possible to replace a compression spring (6) with one or more simple magnets whose power will be less than that of the electromagnet (7) and which will exert a traction permanent on the lock (1) so as to bring it automatically on the path of the interceptable part (2), as soon as the anti-theft switch prevents the passage of current which supplies 1 • electromagnet (7). The explanation is clear enough and does not require illustration. FIG. 7 shows schematically a preferred embodiment of the invention. The support (5) of the lock (1) is here in the form of a gantry. A single gantry (5) is designed for the sake of simplification. In practice, we will most often have a support (5) by latch (1).

A transmitter (11) or an electronic keyboard (11) fixed to the dashboard of the vehicle make it possible to send to an anti-theft switch (13), via a cable (12), coded signals corresponding respectively to the activation or deactivation of the anti-theft device according to the invention. If the coded message is accepted, the anti-theft switch (13) delivers or interrupts, depending on the order received, an electric current which supplies a control member (14), here a solenoid valve connected to a hydraulic circuit supplied by a pump. (15). 'solenoid valve (14) the details of which are not shown in the diagram, in particular comprises a spring and an electromagnet acting both on the valve in a conventional manner. The spring acts permanently so as to close the valve, which happens automatically, when the electromagnet is not supplied with current. The anti-theft device is then out of service. The hydraulic flow produced by the pump (15) is then removed from the circuit by a relief valve (16) located upstream of the solenoid valve (14). The electromagnet causes the valve to open only on command, only when the anti-theft switch (13) authorizes the passage of current. It exerts on the valve a more powerful action <than that of the spring so as to bring it in the open position, which allows as we will see, the deactivation of the lock according to the invention and therefore, the operation of the engine.

To this end, the hydraulic circuit supplies one or more cylinders (7) which tend to place the bolt (s) (1) out of the way of the interceptable part or parts (2).

Figure number 7 actually shows a control member, here 'a solenoid valve (14) acting through one red'a hydraulic circuit (17) on four cylinders ^^ acting on four latches (1) arranged on four interceptable parts (2), concerning four valves (4) differen¬ your distributed on four cylinders numbered I - II - III - IV in a given configuration when the device according to the invention is put into service. - At the preceding time, the anti-theft device being out of service, the solenoid valve (14) was open, the four jacks (7) under the he action of the hydraulic flow pushed the four locks (1) out of the path of the interceptable parts, the engine could run notmalement. The order to commission the device interrupts the current which supplied the control member, the solenoid valve (14). The hydraulic flow being interrupted on the circuit (17), the jacks (7) which act on command on the latches (1) cease their action and empty through the evacuation conduits (9) under the pressure of the automatic devices: springs (6) which act permanently in the opposite direction to the cylinders (7).

In the context which is represented in this diagram, the exhaust valve (4) which corresponds to cylinder number IV is the only one which is in the open position under the indirect action of a cam not shown. here. It is in this configuration, the only trajectory of an interceptable part (2) which can be occupied and intercepted by a lock (1). Other locks (1) occupy the trajectories of other Trappable parts (2) progressively as their empla¬ cement will be released under the action of corresponding cams thus the engine does poura ^"more fontionner.

Note, in FIG. 7, that the feed pipe (8) of the jack has a diameter significantly greater than that of the discharge pipe (9) so that the hydraulic pressure can be sufficient in the jack (7) to compress the spring (6).

We have now even seen various embodiments of the invention, comprising so-called different lock operating devices (1) which can be applied to motorcycles and other accessible motors without lifting the hood. Under these conditions, it is possible to have one. locksmithing equipment inside the shielded enclosure, near the bolt (l), so as to communicate directly or indirectly the movement of the key. This system of locksmithing should not be confused with that which concerns the fixing of the shielded enclosure which we will see later.

The movement of the key can be transmitted as it is, most often circular or semi-circular. It can also be transformed into longitudinal movements using a simple link or a toothed wheel acting on a gear, as in the example illustrated in FIGS. 8 and 9.

In this example, when an authorized user inserts and turns the key (18) in the barrel (19) which acts as a control member, he causes the rotation of the toothed wheel (20) considered here as an integral part of the 'control member and which causes the translation of a rack called transmission part (21). The trans¬ mission piece (21) is integral with a so-called intermediate piece which in this example consists of two differentiated parts (22 and 22 bis) and which transmits the movement of the trans¬ mission piece (21) to the lock (1).

Theoretically, it is possible to directly transmit the movement of the transmission part (21) to the latch (1). We will even see that this so-called intermediate piece (22 and 22 bis) has significant advantages.

By turning the key (18), the rack (21) can be positioned in two separate positions. One (23) said to be close to the path of the interceptable part (2), or even FIG. 9, here a valve lifter. The latter (21) brings, when "" nothing is opposed to it, the lock (1) by means of the so-called intermediate part (22) on the path of at least part of the interceptable part (2) so as to oppose the complete closing of the valve (4!). This position corresponds to the activation of the anti-theft device. The other position (24), said position distant from the path of the interceptable part (2) corresponds in this example, to the deactivation of the lock, the bolt (1) being pulled out of the way of the interceptable part (2), fig.8.

At this point, fig. 8, if an authorized user decides by turning the key (18) in the barrel (19) to put the so-called transmission part (21) in close position (23), there is a strong risk that the interceptable part (2) occupies the place and thus opposes the maneuver.

To remedy this drawback, a compression spring (25) is disposed between the intermediate piece (22) and the latch (1) so that if an obstacle, the interceptable piece (2), opposes the progression of the lock (1), the authorized user can turn the key (18) of the anti-theft device to the service position before leaving his vehicle. The spring (25) is then compressed between the intermediate piece (22 and 22 bis) and the latch (1). It will relax and bring the lock (1) on the path of the interceptable part (2) as soon as it has released the position, under the direct or indirect action of the cam (3).

It can be seen in FIGS. 8 and 9 that the latch 1 is connected to the intermediate piece (22 bis) by means of a pin (26) sliding in an oval eyelet (27) so that the length of the assembly: one half intermediate piece (22 bis) plus lock (1), can be reduced when the spring (25) is compressed, but cannot exceed the length provided when the spring (25) is relaxed.

At this new stage, fig. 9, if an authorized user turns the key (18) to deactivate the anti-theft device, according to this example of implementation of the invention, by bringing back the transmission part (21), as well as the intermediate part (22 and 22 bis) with which it is integral, in the so-called remote position, two cases may arise. If nothing opposes the withdrawal of the lock (1) outside the path of the interceptable part (2) there is no problem, the rack (21) suddenly causes the intermediate part (22 and 22 bis) and the lock (1). But it may happen that the valve return spring (10)

(4) exerts on the lock (1) a pressure such that it is difficult or impossible to turn the key (18). This is why the intermediate piece is divided into two segments (22 and 22 bis) joined by a tension spring (28) so that the turning of the key (18) makes it possible to position the transmission piece (21) in position. distant (24) by entraining only the segment (22) of the intermediate part by virtue of the extension of the tension spring (28), the latter returning to the distant position (24) from the path of the interceptable part (2 .) the second segment (22 bis) of the intermediate piece as well as the latch (1) as soon as it is released from the pressure of the return spring (10) of the valve

(4).

To summarize, and more generally, we will say that in this example, the locksmithing device, more precisely the barrel (19) and the latch (1) are connected by a system of springs (25 and 28), sliding rods or rods (22, 22 bis) or other intermediate parts allowing the action of the key (18) to be delayed on the bolt

This so-called "lockable" maneuvering system is likely to undergo interesting

For example, one can act with a single key movement (18) on several locks (1) all located in the same way on the different cylinders in line of an engine (see plan view, fig. 10). A so-called coupling bar (29) is fixed to the first ring (22) of each intermediate piece. The barrel (19) is located near the coupling rod (29) and on. an axis parallel to it. The transmission part (21) in this configuration is no longer a rack, it is a shaft located in the axis of the barrel (19), it carries cams or eccentric wheels (30) oriented in the same way . When the protruding part of the eccentric wheels (30) presses on the coupling bar (29) it comes in close position (23) of the interceptable part. The anti-theft device is in service. Springs (31) allow to bring the coupling rod (29) in a remote position (24) of the piece Trappable _s (2) progressively as the parts of projminantes exentrées wheels (30) are oriented in the opposite, under the action of the key (18). The anti-theft device is then out of service.

It is easy to modernize the device by replacing the key (18) with a device making up or containing coded signals (11), a device or a device transmitting or transmitting coded signals (12). If it is a transmitter of hertzian waves or infra-red, it will generally be incorporated in the apparatus composing or enclosing the coded signals, these can also be transmitted by cable (12). The barrel (19) can be replaced by an anti-theft switch (13) grouping together means for receiving, analyzing and processing coded signals. The wrist force is replaced in this example by an electric motor (32.). connected to the anti-theft switch (13) and which makes it possible to rotate the transmission part (21).

Obviously, with these improvements, the disposi¬ tivable maneuvers of -verrous may be suitable for both mobile cars with inner pipes and motorcycles.

FIG. 11 represents an example of implementation of the invention which, if it is not the preferred one, is the simplest of those that we have seen.

The transmission part (21) is formed by a shaft which transmits the rotary movement of the key (18) downstream and in the axis of the barrel (19) which acts as a control member. The lock (1) is mounted so as to rotate freely around the shaft (21). Its longitudinal course is stopped on both sides along the tree (21). The shaft (21) drives in its rotation a cylindrical spring or a spiral spring with angular action on the right (33) and a cylindrical spring or a spiral spring with angular action on the left (34). These two springs (33 and 34) flank the latch (1) of on both sides so as to involve it in the rotation of the shaft _? in one direction or the other, when nothing prevents this rotation. If the interceptable part (2) is opposed to the movement of the lock (1), either because it is at the location it will have to occupy, or because it compresses it strongly under the direct or indirect action of the valve return spring (10), the authorized user is nevertheless able to turn the key (18) in the barrel (19) by causing the rotation of the transmission part, the shaft (21), before leaving his vehicle. The implementation of the lock (1) is simply deferred. It will take place under the pressure of one spring (33) or the other (34) after the interceptable part (2) has moved under the direct or indirect action of the cam (3).

A system of gears and rods or links, both optional and not shown in the drawings, optionally makes it possible to transmit the movement of the shaft (21) to several locks.

It is easy to modernize this device like that of the previous example using a coded signal transmitter, an anti-theft switch, a motor, etc.

FIG. 12 represents in section, a nonlimiting example of an armored enclosure (36) and its fixing system including, at least, its locking system (37, 38, 39) on a so-called deterrent anchor (40 ). In this example, the so-called active part of the locking system, the barrel (37) and the bolt (38) are integral with the shielded enclosure (36), while the passive part, the keeper (39) is located on the deterrent anchor (40).

This figure shows among other things, on the deterrent anchor (40), an example of configuration (45) flush with the combustion chamber and liable to deteriorate the said combustion chamber sufficiently in the event of tearing of the deterrent anchor (40), as a result of breaking into the shielded enclosure (36), so as to prevent reaching the necessary compression threshold be able to explode in the corresponding cylinder. In this example, this configuration (45 is obtained by means of two so-called tear-off arms (41).

The so-called tear-off pad (42), optional, is changeable in the event of deterioration as a result of the tearing off of the deterrent anchor (40). A nut (43) fixes the deterrent anchor (40).

This figure 12 is very representative of the invention taken as a whole, which is why it was chosen to illustrate the abstract. As such, it represents in particular a lock (1), a valve (4) and an interceptable part (2), a device (6 - 7) for operating the lock (1), as well as means for controlling the device. latch operation (11 - 12 13), an electrical current supply (35).

Claims

1) Anti-theft device for motor vehicles, cars, motorcycles and the like, preventing the valves from closing on internal combustion engines, characterized:

- By a piece called lock (1) arranged so as to be able to inter- "come on the path of part or all of a part of the distribution said distribution interceptable piece (2), located downstream of the camshaft (3), for example, a valve stem, a tappet, a rocker or more generally, an element linked to the valve (4) or acting directly or indirectly on it, so as to limit its closing .- - in that the latch (1) intervenes in the path of the interceptable part (2) at a level such that the opening of the valve (4) remains sufficient to prevent reaching the rate of compression required for explosion in the cylinder;

- in that the latch (1) can be placed away from the path of the interceptable part (2):

- In that the solidity of the bolt (1) and its support (5) are cal¬ culated so as to withstand the direct or indirect pressure of the return spring (10) of the valve (4).

2) Device known as automatic actuating the lock (1) according to claim 1, characterized by:

- an automatic actuator (6) exerting a permanent force tending to automatically dispose the lock (1) on the path of part or all of a so-called interceptable part (2);

- An actuator (7) exerting on command and only on command a force greater than that of the automatic actuator (6) to move the lock (1) out of the path of the interceptable part (2).

3) Device according to claim 2 characterized. :

- in that the automatic actuator (6) used to exert a permanent forum on the latch (1) is preferably an elastic or magnetic member;

- in that the means (7) exerting, only on command, a force greater than that of the automatic actuator (6) on the latch (1) can be constituted by any kind of actuator;

- in that the control means or all of the control means (11,12,13) of the actuator (7) requires the use of a selected code or signals. 4) Device known as simplified for so-called differentiable lock maneuver (1) according to claim 1 characterized:

- in that it comprises an actuator (19 or 32) with rotating movement;

- in that it comprises a so-called transmission part (21) constituted by a shaft (21) transmitting the rotary movement of the actuator (19 or 32);

- By one or more elastic members (33) with angular action, connected to the shaft (21) and making it possible to instantly transmit to the ver¬ rou (1) the rotational movement of the shaft (21) when the space is free or, if space is occupied, to defer movement until the space will be freed by the interceptable part (2);

- in that the stroke of the bolt (1) along the shaft (21) is stopped at a level suitable for obstructing the closing of the valve (

5) So-called improved device for a so-called differentiable lock maneuver (1 characterized:

- by an actuator (19 or 32)

- By a so-called transmission part (21) transmitting or transforming longitudinally the movement of the actuator (19 or 32);

- by a device of elastic elements (25,28) and so-called intermediate parts (22,22 bis), mounted between the transmission part (21) and the latch (1) and, ensuring, as appropriate, the transmission instant or delayed movement of the transmission part (21) to the> lock (1).

6) Device according to claim 1 and one or other of the preceding reven¬ dications charctérisè in that one can have one or more latches (1 and 1 bis) on a single interceptable part (2):

7) General device characterized in that Yβr-çous (1) according to claims 1 and 6 and one or other of claims 2,3, -4 and 5 cover as many cylinders as is deemed necessary on an explosion motor. 8) Device according to claims 1, 4 and 5, making it possible to act on several locks (1) using a single actuator (19 or 32), characterized in that it comprises:

- an actuator (19 or 32);

- a so-called transmission part (21); - A so-called coupling bar (29) connecting the transmission part (21) to several autonomous assemblies of elastic elements (25,28) and so-called intermediate parts (22,22bis) acting on several latches (1);

- one or more cams or eccentric wheels (30) integral with the transmission part (21), applying pressure to the coupling bar (29) and consequently, on the latches (1) to push them onto the path of the parts interceptable (2) via elastic element (25) and intermediate parts (22,22bis);

- one or more springs (31) to bring back the coupling bar (29) and consequently, the latches (1) in a distant position (24) from the path of the interceptable parts (2) when the eccentric wheels (30) do not plus pressure on the coupling rod (29).

9) Device for remote control or remote control of a so-called automatic latch operating device (1) according to claims 1,2 and 3> u, for a latch operating device (1) said to be differentiable according to claims 1,4 or 5 and more generally, according to all of the preceding claims, characterized:

- By> a means (11) composing or transmitting coded signals with the corresponding transmission means (12), on the one hand;

- By means of reception, analysis and processing of coded messages on the other hand and forming a so-called anti-theft switch assembly (13); - in that the anti-theft switch (13) makes it possible to interrupt or restore the electrical supply (35) of an actuator (7, 14 or 32).

10) Device for close control of the latch maneuver (1) with differing effect according to claims 1,4 or 5, characterized in that the actuator (19) is a lock mechanism. 11) Dispositf for actuating a latch maneuver &). Effect différa¬ ble according to claims 1,4 or 5 and 8, characterized in. that the actuator (32) is other than a lock mechanism.

12) Device allowing the engine to operate in the event of a breakdown of the anti-theft device according to claims 2 and 3, which would cause it to be put into automatic service and the engine not to operate, characterized by a system of screws or notches blocking the latch (l) out of the way of the interceptable part (2).

13) Device according to the preceding claims taken as a whole, characterized in that the anti-theft device which is the subject of the invention (1,2,6,7,21, 22,25,29,30,32 and possibly others), the distribution system (4,10), located at the height: of intervention of the lock (1) and downstream as well as the anti-theft switch (13) are protected from intrusions by a shielded enclosure (36). 14) Device for deterrence and protection against intrusion on an anti-theft device on internal combustion engines according to the preceding claims, characterized:

- by one or more rods known as deterrent anchors (40) attached to the cylinder head (44), passing through the latter (44) from the combustion chamber to the opposite face and extending towards a rigid armored enclosure (36) housing the anti-theft device according to the invention;

- in that a deterrent anchor (40) and the rigid armored enclosure (36) are joined by means or a set of means (37,38,39) located inside the rigid armored enclosure ( 36);

- in that the deterrent anchor (40), the rigid armored enclosure (36) the means or the set of means (37,38,39) bringing together the dissuasion anchor (40) and the rigid armored enclosure (36) forms a unit tearing in one piece if the opening of the rigid armored enclosure (36) is forced sufficiently from the outside;

- in that the detachment of the deterrent anchor (40) causes sufficient leakage in the combustion chamber to prevent reaching the compression threshold making it possible to produce the explosion.

15) Device according to the preceding claim characterized:

- in that the solidity of the assembly formed by the deterrent anchor. (40), the rigid armored enclosure (36), the means or means (37,38,39) reuniting the deterrent anchor (40) to the rigid armored enclosure (36) is greater than that or means (42) attaching the deterrent anchor (40) to the cylinder head (44).

16) DisDθsitif according to claim 14 characterized:

- in that the deterrent anchor (40) comprises at the end situated on the side of the combustion chamber, a particular configuration (45) capable of causing as a result of tearing resulting from a forced opening of the rigid shielded enclosure (36), a deterioration of the cylinder head (44), or of an annexed part participating in the sealing of the combustion chamber;

- In that the deterioration caused by the particular configuration (45) is sufficient to prevent reaching the compression ratio necessary to produce an explosion in the corresponding cylinder.

17) Device according to the two preceding claims characterized:

- By a so-called pull-out pellet (42) participating in the connection between the deterrent anchor (40) and the cylinder head (44) and, at the sealing of the combustion chamber; - in that the so-called tear-off disc (42) is designed so as to undergo, in the event of detachment of the deterrent anchor (40), deterioration sufficient to prevent reaching the compression ratio necessary for obtain an explosion in the corresponding cylinder, without damaging the cylinder head (44).

18) Device according to claim 14 characterized in that the mounting of the deterrent anchor (40) is carried out from the combustion chamber, breech deposited.

19) Device according to claim 14 characterized in that the surrounded ^¬ rigid armored (36) offering good resistance to chisel.

20) Device uniting the deterrent anchor (40) and the rigid armored enclosure (36) according to claim 14, characterized by a so-called active part (37,38) secured to one of the two elements: dissuasive anchor ^¬ sion (40) or rigid shielded enclosure (36) and, by a so-called passive part (39) integral with the other element.

21) Locking device according to claims 14 and 20 char ^¬ terized by a lock (37) fixed to one of the elements: dissuasion anchor (40) or rigid armored enclosure (36), inside the enclosure (36) on the one hand, a keeper or a special configuration (39) located on the other element on the other hand, so that it can be associated with the pen (38) of the lock (37) and thus, block the rigid armored enclosure (36) on the cylinder head (44) via the deterrent anchor (40).

22) Device according to claims 14 and 16 characterized in that the rigid armored enclosure (36) is fixed on one or more deterrent anchors (40) and houses an anti-theft device preventing the closing of the valves according to the invention as well that the distribution mechanisms located up and downstream from the point of intervention of said anti-theft device on said distribution mechanism.

23) Device according to claims 14,16 and 22 characterized in that the rigid shielded enclosure (36) houses or preserves at least the terminal part of the selective device (19) or coded (13) for controlling the anti-theft device according to the 'invention.

24) Device according to claim 16 characterized in that the specific con¬ figuration (45) is constituted by one or more "arms" called tear-off arms (41).