DE29715197U1 - Device for checking and adjusting the tire pressure of motor vehicles - Google Patents

Description

Fittings factory Ernst Horn GmbH Flensburg

Device for checking and adjusting the tire pressure of motor vehicles

The invention relates to a device for checking and adjusting the tire pressure of motor vehicles in or on a housing, comprising a compressed air accumulator, a solenoid valve block which is supplied with compressed air and has at least one hose connection for connection to the tire valve, a pressure measuring device and a control which controls the compressed air output

Until now, it was a little difficult for customers to set the tire pressure in vehicles correctly. Either an employee of the station knew what tire pressure was required and how the adjustment could be carried out in detail using the devices provided. If the customer did this himself, it was a complicated process if he was inexperienced and could very often lead to the wrong pressure being set, which is dangerous both when it comes to increasing and decreasing the pressure.

This is where the present invention comes in, namely in the effort to largely automate the setting of the pressure in tires of motor vehicles. This is achieved in the device of the type mentioned at the beginning in that the control comprises a data memory (19) and a data input part through which

a) the desired tire pressure and/or

b) Data on the vehicle type, loading condition
of the vehicle, the position of the tire on the
Vehicle etc.

can be entered.

According to a preferred embodiment, the data input compartment is designed as a push button arrangement, keyboard, calculator, keyboard, data reader for chips, chip cards, magnetic cards and the like and is arranged either on the housing or separately from it via a data transmission line.

The customer therefore has several options available in connection with devices according to the invention. In the simplest case, the desired pressure data is entered and the associated device carries out the process after initial pressure measurements until the correct pressure has been set, which is also indicated by a signal.

According to a preferred embodiment, the customer identifies himself with a magnetic memory card and can use this to instruct the device to carry out the corresponding measuring processes and to set the corresponding pressures in the tires.

The input device can be provided directly on the housing, which is particularly advantageous if the housing itself is movable. However, it is also entirely possible for the correct pressure for the tires of a specific vehicle to be set from the sales premises, with the measuring process and the pressure application process being carried out automatically on the vehicle.

The invention is explained below by way of example with reference to the drawing.

The figure shows a perspective view of the device according to the invention.

In the device, a car tire is shown with 17 and the device according to the invention is generally designated with 10.

In the housing 10 of the device according to the invention there is a power supply unit 12 and an air maintenance unit 11, whereby these devices are supplied with the mains voltage on the one hand and with compressed air on the other hand.

13 designates a control system which is supplied with energy via the power supply unit 12 and is equipped with displays 14 which can be optical or acoustic display means.

16 designates a solenoid valve block that has controlled valves so that compressed air can be supplied to a car tire 17 via the compressed air supply and the maintenance unit 11. The measuring process at the beginning and at the end is controlled by a sensor 15, which forwards the measured values to the controller 13 for processing.

According to the invention, the controller 13 contains a memory 19 in which the relevant data on pressures, vehicle types, loading status and position of the tires on the vehicle are stored. In this case, 18 designates a keyboard input via which the corresponding data can be entered into the memory.

There are three preferred versions of the device according to the invention:

Version A:

Version A is a simple version. The customer connects the tire to be checked to the device and then sets the desired tire pressure using the plus/minus buttons. The process is then started by pressing a start button. The device checks the current tire pressure and then sets the preselected pressure.

An acoustic signal indicates the end of the process to the customer. This process must be carried out for each tire.

Version B:

In version B, the device works with an internal file in a memory in which all relevant tire pressures of the different car types are stored. The customer connects the tire to be tested to the device. The customer enters his car make via a menu control. The machine then asks about the load status of the vehicle and whether a front or rear tire (only if different pressures are specified by the manufacturer) should be checked or inflated. After entering the relevant data (load status or front or rear tire), the process is started. An acoustic signal indicates to the customer that the tire pressure adjustment has been completed. The customer must now connect the next tire to the machine and start the test process with the start button. If the second front or rear tire is being checked or the tire pressures specified by the manufacturer for the front and rear tires are

identical, only the start button needs to be pressed. Otherwise, you must specify whether a front or rear tire should be checked.

With this version, the data must be maintained, i.e. suitable data storage devices (diskettes, tapes, chips, etc.) must be used to ensure that the data is always up to date.

Customers whose vehicle data is not saved can, as described in version A, enter the desired tire pressure manually and start the process by pressing the {start button}.

Version C:

This version works with "data cards" (magnetic, chip cards, etc.) that the operator of the device or the station issues to its customers. The tire pressures of the customer's vehicle are stored on these cards. The customer connects the tire to be checked to the device and then inserts his data card into the card reader provided. The memory receives the correct values via the data card. The device now asks about the load status of the vehicle and, if the tire pressures specified by the manufacturer for the front and rear tires are not identical, whether a front or rear tire should be checked.

After entering the relevant data (loading status and front or rear tires), the process is started. An acoustic signal indicates to the customer that the tire pressure adjustment has been completed. The customer must now connect the next tire to the machine and start the test process with the start button. If the second front or rear tire is being tested or the tire pressures specified by the manufacturer are

for the front and rear tires are identical, only the start button needs to be pressed. Otherwise, you must specify whether a front or rear tire should be checked.

The advantage for the customer in version C is that he no longer has to "worry" about the correct values. The advantage for the station is that he ties the customer to his station. It is also conceivable to issue a card for all stations of a company (petrol station brand), so that the customer ties himself to one company. Customers who do not have a data card can, as described in version A, enter the desired tire pressure manually and start the process by pressing a button (start button).

Claims (2)

Protection claims 1. Device for checking and adjusting the tire pressure of motor vehicles in or on a housing, having a compressed air reservoir, a solenoid valve block which is supplied with compressed air and has at least one hose connection for connection to the tire valve, a pressure measuring device and a control which controls the compressed air output, characterized in that the control (13) comprises a data memory (19) and a data input part (18) through which v-> a) the desired tire pressure and/or b) Data on the vehicle type, loading condition
of the vehicle, the position of the tire (17) on the
Vehicle etc. can be entered. 2. Device according to claim 1, characterized in that the data input part (18) is designed as a push button arrangement, keyboard, calculator, keyboard, data reader for chips, chip cards, magnetic cards and the like and is arranged either on the housing (10) or separately from it via a data transmission line. Telephone (040) 381? .11-34 · Telecopy / Facsimile (040) 38092 88
Internet 100117.1260@compuserve.com · CompnSptvf? 100117,1260 · VAINo. DE 130492 022