Tire pressure pneumocontroller

FIELD: automotive industry; instrumentation engineering.

SUBSTANCE: proposed pneumocontroller includes sensor installed on wheel rim with sensing element inwards tire space, pressure indicator installed in vehicle and transmitting device. Transmitting device consists of contact ring installed on working surface of brake disk or drum, being insulated from drum, electric brush in contact with contact ring and arranged on protective cover of brake disk or on brake shoe and connecting circuit.

EFFECT: reduced wear of tires, improved stability and safety of vehicle on road.

4 cl, 7 dwg

 

Pneumoconiosis pressure in the tires - Electromechanical device, which belongs to the field of instrumentation and is intended for use in the automotive industry as an automatic signal level control tire pressure and alarm if it's lower than acceptable.

The U.S. Congress passed a law prohibiting operation since 2003 passenger cars without control systems for tire pressure (“driving”, No. 6/2001, page 54).

To combat unauthorized reduction in operating pressure in the tires of vehicles and prevent accidents, to control and maintain active tire pressure there are various technical solutions. For example, in military techniques known and used systems supporting the tire pressure of the wheels, such as a Device for supplying air from a stationary axle for rotating the hub” (EN 2019434, EN 2132283). But such systems impractical to use in a production automotive industry due to their structural complexity, high cost, and no special conditions.

It is known a device for dynamic control of the air pressure in the pneumatic tire of the vehicle (EN 2047115, 6 G 01 L 17/00). The essence of the invention lies in the fact that it is contains two inductive transducer in the form of permanent magnets, made with the possibility of installation on the respective wheels, and induction coils made with the possibility of installation on the fixed part of the vehicle and interacting with the respective magnets, and the processing unit and the indication signal includes an information LEDs, the blocking diode, led shunt resistor. The change of air pressure in tires is accompanied by the change of their radii and a corresponding change in the frequency of rotation. Information signals of the wheels, induced in the induction coils, acting upon the communication channel to the LEDs, which record the frequency of their rotation. The blocking diode protects led and a shunt resistor is chosen so that the indicator led lights up at the coincidence of pulses on the LEDs. The frequency of fire indicator LEDs you can judge the difference of air pressure in the respective pair of wheels.

Technical solution with the application of the principle of changing the wheel radius has the following disadvantages.

Not taken into account the change of the radii of the wheels depending on different loading of the vehicle and the irregularity of its location. Not taken into account the fact that the geometric dimensions of the tires have a fairly large scatter, even in the new, up to several mi is limitro, the calculation of the authors shows that the change of radius ΔR 0.1 mm corresponds to a change of pressure ΔP 0.1 kgf/cm2(see EN 2047115, /11), so the system is initially prepared to fail.

The system will not work in a static condition of the car (in the Parking lot), because if there is no movement there is no difference of frequencies of rotation of the wheels. When equal spasenoski tires, which most often occurs when the tires for a long time not swap, the system will not work.

The closest to the invention, i.e. the prototype, is “a Device for dynamic control of the air pressure in the pneumatic tire of the vehicle” (EN 2143345, IPC 6 In 60 23/02, 1998).

The device includes a cap that is screwed onto the valve of the tire instead of the regular cap and the housing, the holes are introduced provided with an air filter sleeve with a head for pressing rod of the spool valve of the tire. Inside the body, there is a threshold pressure sensor with a membrane and a switching node and a passive transponder. When the pressure in the tire, the membrane has a deflection, the contact of the switching node is closed and the transponder accepts RF signals from the established on the basis of the vehicle radiator. In the case of unacceptable reduction of the tire pressure membrane straightens up, to the tact switch node is opened and the transponder ceases to issue a response. The lack of response is recorded in the receiving node information and the driver is alerted by an alarm.

The specified device has the following disadvantages.

Should be allocated for each wheel a certain frequency code RF packages”, i.e. a separate coding for LC-circuit of each device with a system based on the vehicle for these purposes on a separate frequency generator with the corresponding decoding at the receiving node information and tuned to the resonance frequency of LC-circuits of the transponders, to avoid interference.

In case of failure of any of the elements of the transmitting terminal (according to the terminology of the authors), i.e. devices, the necessity of its replacement, since the repair it may not be. As a result, it is necessary to select a new device to replace with the relevant RF parameters that will be quite difficult to do.

Setting the resonance frequency of LC-circuits requires special equipment, qualifications, and this is when the alleged mass production. The device according to complexity comparable with the instrument for measurements with high accuracy class.

The device is not reliable in operation and short-lived, because frankly weak spot, namely a switching node. Possible nesanktsionirovanno the e fluctuations of the contacts under the influence of vibration, and the breach or failure due to shock, deformation of the device, the oxidation of the contacts (if they are not made of precious metals). The required interference protection devices, including passive transponder and the receiving node information (shielding). Not taken into account fluctuations in the ambient temperature, which can be from -30°C in winter and +30°summer and then change the tire pressure can reach 20-25% of the nominal value.

Currently, the company “Take” offers pressure sensor and temperature with a radio transmitter operating at a frequency of 433 MHz, which includes lithium-ion battery, and fixed by special valve, which is installed instead of the regular. Leading brands such as Mercedes-Benz, BMW, Renault, Volvo, etc. offer prospective owners to pay for this system is about $ 500. In Russia this amount is approximately 10% of the cost of a new car.

The task of the invention is to develop a device for emergency control of the pressure in a car tire in a static state and during movement of the vehicle. The device must be simple to manufacture and maintain, cheap, reliable and remotepoint in the simplest terms. It should not be assumed considerable changed the th and improvements in existing designs of components and assemblies for mass-produced cars and could be installed in the conditions of service centers as additional equipment on vehicles released prior to the implementation of the present invention in the production.

The aim is achieved by applying the well-known principle of transmission of an electrical signal from the fixed part of the electrical machinery - stator for the rotating part of the rotor using a rotating slip rings on the rotor and a set of stationary brushes.

The novelty of the present invention, the essential feature differences from the prototype is the lack of sophisticated radio system, instead of which applied to the transmitting device consisting of a contact ring on the working surface of the brake disc or drum, electrical brushes located on the protective casing of the brake disc or brake pad and use instead of the screw on the gate bus device of a simple pressure sensor similar device and the principle of emergency oil pressure sensor type MM-D Winters or 2101-3810600 which is inserted in the rim is similar to valve tubeless tires.

The description of the device

Pneumoconiosis pressure in the tire includes a signal pressure device, item 1, Figure 1, is installed in the vehicle in the form of a block, pos.6, the light signal from light emitting diodes or light bulbs with optional audio alarm, pos.5. Also pneumoconiosis includes Yes the chick signal device, 2, mounted on the wheel rim.

The transmitting device comprises a contact ring 3, Figure 1, is installed on the working surface of the brake disc or drum, and electrical carbon-graphite or electric graphitized brush, pos.4, Figure 1, is fixed on the protective casing of the brake disc or brake pad.

The scheme provides for the transfer of an electrical signal from the sensor 2 to the contact ring 3, and then through the brush, pos.4, to the signal pressure device, item 1. Circuit powered by the on-Board voltage from the battery.

The device operates as follows.

Mounted on the wheel rim, pos.7, Figure 2, and the incoming sensor element inside tubeless tires, position 12, the sensor signal device, item 2, is configured to contact closure on the threshold pressure. It works by reducing the pressure inside the tire, i.e. closes the contacts and switches wiring diagram of pneumoconiosis when the pressure drops below the set.

Electric current from the terminal (+) via the signal pressure device, pos.6, Figure 1, through the signal lamp, item 1, the wire that connects to the brush, pos.4, through the contact ring, POS. 3, and the electric wire that connects to the sensor signal device, pos.2, through the rim goes to mass (-).

In R is the result of the triggered light and sound alert.

The number of pneumoconiosis is determined by the number of wheels that are subject to tracking. In the usual form on four wheels needed four sets with common block signaling system. In the diagram Figure 1 shows the findings of the terminals a, B, C, D from the signal pressure device (block stun alarm with buzzer sound alarm 5, the sensors signal device of each wheel. The invention can be illustrated by examples of cases in a particular implementation based on commercially available components to the automotive industry.

Example 1.

The example illustrates the design of the device pneumoconiosis tire pressure for a vehicle with front-wheel drive VAZ-21103 on the front wheel with disc brakes. The sensor signal device, item 2, Figure 2, is hermetically mounted on the wheel rim, pos.7, the sensor element inside the cavity of the tire, position 12, and is configured to actuate when the pressure of 1.65+/-0,05 kgf/cm2. From the sensor, pos.2, inside a protective metal tube of small diameter 3-4 mm, POS, the electric wire is connected to the hub, item 8, through the plug, POS, and further through the addition made holes in the hub, item 8, and planting the front-end part of the brake disc, position 9, the contact ring 3, which is installed on the inner working surface of the brake disc and izolirovannoe him. Next, the signal is electrical brush, pos.4 installed on the protective casing 10. From brushes signal wire through the output of “And” is supplied to the alarm unit, pos.6, the signal pressure device, item 1, and the buzzer, 5, 1.

One of the variants of technical solutions supply signal from the sensor to the signal device shown in Figure 3. Where, position 9, vented brake disc, POS, sleeve, pos.16, electric wire which is connected to the contact ring 3, through inter space ventilation ribs, pos.17. The contact ring is in the groove on the inner working surface of the brake disc and coaxial to its axis of rotation, glued and insulated from it by using polyester or phenol-formaldehyde polymer, or epoxy resin or insulating varnish, pos.18.

Figure 4 shows a possible location of the brush.

On the protective casing 10, brake disc, position 9, installed with screws, POS, brush in the brush holder, pos.4. Graphite brush is in contact with the contact ring 3. Contact ring periodically during braking is in contact with the brake Shoe of the brake mechanism, POS, making resides in a relatively pure state, as it is cleaned from dirt and moisture when braking with friction linings.

From EDI electric signal is supplied to the signal pressure device, made in the form of bulbs or LEDs, to indicate and additionally on the buzzer unit audible alarm located in the vehicle in any convenient place. When the pressure inside one of the tires is lower than expected by the pressure sensor, the contacts in it are locked, there is a closed circuit illuminates the corresponding light bulb, and alerts the driver of the malfunction that occurred in a specific wheel. POS the knuckle of the front suspension of the car in figure 2, 4 marked for a more complete view of the configuration element.

Example 2.

The example illustrates the device pneumoconiosis tire pressure for car VAZ-21103 on the rear wheel with brake drums and marked on Figure 5.

The sensor signal device is mounted on the rim of the sensor element inside the cavity of the tire analogously to Example 1, as shown in figure 2. On the brake pads, POS, 5, set the brush in the brush holder, 24, with screws and in contact with the contact ring, POS, 6. The slip ring is located on the working surface of the brake drum, .23. It is arranged and isolated from the brake drum in a specially made slot. The brush is always in contact with the contact ring regardless of the position of the pads, since the spring sediv the brush holder constantly running out. In the block, POS, and the friction pad made the hole for the brush to contact with the track of the contact ring. When the pressure is below the set sensor signal device is activated and switching schemes. Through the wire, passing through the body of the brake drum 6, the brush 24, Figure 5, and then again on the drive signal supplied to the corresponding signal device.

Example 3.

One of the elements of the present invention is a sensor signal device, which may be similar to the emergency pressure sensor, for example, type MM-D Winters or 2101-3810600 used as sensors warning lamps oil pressure in the lubricating system of the engine. For the technical implementation of the invention features in one embodiment, to apply the same sensor with possible changes in design, dimensions and device footprint for example, indicated in the diagram Fig.7.

The proposed sensor consists of:

pot metal housing with the screw part for attachment to the drive; option 26 plastic cap; POS kontrogaika; POS terminal of the sensor; POS contact controller; POS thrust spring; 31 persistent calyx; POS Zavarzina contact plate; POS sensitive membrane; POS a plastic rod.

Compressed air Davie is on the membrane, POS, when the pressure is above the set resulting force exceeds the force of elasticity of the spring, POS, and persistent calyx, 31, does not come into contact with the contact plate. When the pressure of the plastic rod, POS, moves under the influence of spring and contacts the persistent calyx, 31, and the contact plate are closed. As a result, the terminals of the sensor, POS on the Cabinet, POS, receives an electrical signal and all electrical diagram pneumoconiosis closed.

Due to the fact that the ambient temperature can vary from -30°C in winter to +30°in summer there are changes in tire pressure, the difference of which can reach up to 25%. To eliminate the temperature factor and the resulting error is provided a regulating element in the form of contact-regulator, POS. If necessary, use a screwdriver and provided in the end face of the contact controller slot you can change the compression ratio of the thrust of the spring and thereby adjust the sensor to the required pressure in accordance with the changing temperature. Using contragate, POS, this situation can be fixed. Adjustment can be made independently controlling the actuation of the sensor readings of a standard automotive gauge, attached to the valve tire wheel.

Modern safety requirements the viginia require secure a stable safe state of the main components and systems of the car. Suspension and wheels are responsible for the security elements of the car. In particular, the condition of the tires, the pressure directly affect traffic safety.

This invention reduces tyre wear, to ensure the stability of the vehicle while driving, to avoid losing control of the transport and destruction of tires and accordingly the accident. The unit is easy to manufacture and to install, reliable in operation and remotescope without the participation of special equipment and qualified personnel.

The device operates in static and dynamic conditions, i.e. while parked and while driving.

1. Pneumoconiosis pressure in the tires, including the sensor signal device mounted on the wheel rim sensitive element inside the cavity of the tire, the signal pressure device mounted in the vehicle for signaling and transmitting device, characterized in that the transmitting device consists of a contact ring mounted on the working surface of the brake disc or drum and isolated from it, electrical brushes that are in contact with the contact ring and located on the protective casing of the brake disc or brake pad, and a wiring diagram.

2. Pneumoconiosis pressure in the car the ins according to claim 1, characterized in that the signal pressure device is a device visual, light and/or audible alarm consisting of light bulbs or LEDs and buzzer that is activated when the closure of the contacts in the sensor signal device when the pressure in the tire below the set.

3. Pneumoconiosis pressure in the tire according to claim 1, characterized in that the sensor signal device is a device diaphragm type contacts which are closed when the controlled pressure acting on the membrane of the sensor will be smaller than the minimum critical value.

4. Pneumoconiosis pressure in the tire according to claim 3, characterized in that the sensor signal device further comprises an adjustment device for setting the threshold value at which the closure of the contacts in the sensor.



 

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FIELD: automotive industry; instrumentation engineering.

SUBSTANCE: proposed pneumocontroller includes sensor installed on wheel rim with sensing element inwards tire space, pressure indicator installed in vehicle and transmitting device. Transmitting device consists of contact ring installed on working surface of brake disk or drum, being insulated from drum, electric brush in contact with contact ring and arranged on protective cover of brake disk or on brake shoe and connecting circuit.

EFFECT: reduced wear of tires, improved stability and safety of vehicle on road.

4 cl, 7 dwg

FIELD: transport engineering.

SUBSTANCE: invention is designed for tires provided with devices for maintaining serviceability of tire in case of pressure drop. For this purpose pressure drop detector is provided. Starting from the moment when said detector notes preset pressure drop limit, distance covered is periodically measured and characteristics parameter of riding conditions is determined. Depending on said parameters and distance covered within definite period, characteristic value of potential elementary damage of device is found in expired period. Then total damage is evaluated basing on combustion of said elementary damage found from beginning of riding on deflected tire, and information is supplied to driver indicating evaluated value of common damage of device for riding on deflated tire.

EFFECT: provision of on-line information of real distance which can be covered by vehicle in case of considerable reduction of pressure in tire under real conditions of riding.

26 cl, 1 dwg

Bus control system // 2352473

FIELD: transport.

SUBSTANCE: bus control system selects the frequency with the high probability of reception when the signal requesting for the measured data is transmitted from the receiver to a high-sensitivity transducer, or when the signal request frequency varies to provide for timely reception of measured data from the said transducer. The receiver transmits the signal requesting for the measured data to the aforesaid transducer at a frequency used for the last successful receipt of measured data from the transducer. It, also, transmits the request signal another time in case the measured has not been received till the requested data is successfully received. Note that it transmits the request signal to the transducer at the frequency used for penultimate successful receipt of measured data in case the number of request signal transmissions reaches the preset value.

EFFECT: higher accuracy of bus control.

4 cl, 6 dwg

FIELD: motor industry.

SUBSTANCE: group of inventions is related to facilities for electric energy generation installed on wheels. Tyre assembly with integrated elements of energy generation comprises one or more piezoelectric devices and modules of energy conversion. Piezoelectric devices include multiple piezoelectric fibres, which are mainly inbuilt in a unidirectional manner into matrix of epoxide resin, piezoceramic plate arranged on substrate and surrounded with protective body, or piezocermaic unimorphous structure adhered by thermoplastic polyimide to upper and lower conducting layers. Each piezoelectric device includes multiple piezoelectric elements, which are connected serially and/or parallel, having configuration with appropriate directions of polarisation in phase or opposite phases and/or having configuration in modes of displacement d33 or d31. Piezoelectric devices are fixed in tyre or wheel so that electric charge is generated in them, when wheel moves along earth surface, and is saved in one or several devices of energy accumulation. Energy may then be used for electronic circuits, such as system of tyre monitoring, which sends the following information along wireless communication line - tyre pressure, temperature and variables of remote receiver location identification.

EFFECT: invention makes it possible to reduce volume of hardware required to tyre monitoring and to remove limitations on types and dimensions of electronic equipment intended for use in tyre and wheel.

37 cl, 18 dwg

FIELD: transport.

SUBSTANCE: invention relates to designs of automotive tires with built-in electronic devices. Proposed tire assembly comprises one or more piezo-electric devices designed to generate electric discharge when tire is subjected to mechanical strain related with tire elements or wheel deflection. Said piezo-electric device can be built in several tire structures on different sections. Proposed piezo-electric device and electronic device related therewith can be inserted into tire crown or sides between external tread element, first and second steel breakers of breaker pad, carcass, tread section, internal sealing layer, zone base etc. Piezo-electric device with rubber case, to be installed on choice, can be secured to said inner sealing layer and tire outer surface. Piezo-electric devices can be made integral with protective support to run at higher speed when tire loses air pressure. In another version piezo-electric devices can also be made integral with non-pneumatic tire with structural support as, for example tire comprising reinforced circular rim, multiple sheet spokes running across reinforced circular rim and radially inside from it. It includes also mounting rim on inner end of mounting spokes and tread section arranged on circular rim.

EFFECT: tire with built-in electronic components with no stage batteries intended for running tire checks.

10 cl, 21 dwg

FIELD: transport.

SUBSTANCE: invention relates to automotive industry. Tire (1) with toroidal inner surface (2) comprises electronic device (10) incorporating electronic unit and antenna. The latter is connected with said electronic unit and has inner perimetric edge and retainer case (40) arranged on aforesaid inner surface (2) to be engaged between said electronic device (10) and said tire (1). Said retainer case (40) comprises at least two parts. Said electronic unit is arranged between said two parts. Each of said parts incorporates: retainer surface secured to inner surface (2) of tire (1) and groove where inner perimetric edge of said antenna adjoins to limit displacement between electronic unit and retainer case (40). Invention covers also method of fitting electronic unit into tire.

EFFECT: ease of manufacture and higher reliability.

49 cl, 10 dwg

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