DE3325051A1 - Switch - Google Patents

Abstract

Published without abstract.

Description

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When operating land vehicles, rail vehicles and on slopes For aircraft coasting, it is advantageous for the wheels to come to a standstill in relation to the road surface when braking.

The sensor required for this should be small, inexpensive, safe and easy to assemble be. The latter is of particular importance when retrofitting such vehicles.

When braking a vehicle, brake shoes or brake disks are used applied against a brake drum or disc. These elements are supported here indirectly against the axis. The brake caliper or the brake shoes are on attached to the brake anchor plate, the latter are rigidly connected to the axles.

The following is a typical application for motor vehicles. used Procedure described.

The body of a vehicle is connected to the axles via suspension systems or Suspension elements connected. Added to this is the elasticity of the connecting elements used and the body itself.

If a motor vehicle or other vehicle is then braked by wheel brakes the wheels and axles are decelerated.

At the same time, of course, the body is also decelerated is also applicable to the inmates.

At the moment when the speed between the wheel and the road = O the body with the occupants can still move a little in the original direction of travel move, even the wheel hubs do this due to the elasticity of the tires.

This movement continues until the elastic paths between The body and lane are empty. At this moment the body is moving contrary to the previous direction of travel by a small amount backwards. Here a "return impulse" is created, which is clearly perceived by the occupants The body of this impulse depends on the actuation of the brake and the elasticity between the absolutely rigid road surface and the body.

Measurements have shown that the size of this return pulse is approx. 0.01 g ... O1, g and higher. The mentioned delays occur with normal Road traffic, stopping at traffic lights, traffic jams in front of railway barriers, etc.

on.

By operating the braking device very gently and releasing the brake This return pulse can be suppressed before the motor vehicle comes to a complete standstill will. This case often occurs when a "red" is displayed when approaching Traffic light same on yellow or. Green phase changes and you continue driving without stopping is possible.

During normal driving, a return pulse occurs the sign for the total standstill of the vehicle, i.e. speed between lanes and tires have become 0.

This return pulse is registered by a switch which turns off a seismic mass. The geismic one moves through the return impulse Ground to an electrical switch, better to use an electronic one Sensor as they are state of the art.

An example is given as this electrical or electronic Impulse can be used.

Lt. Admission regulations are at least in the Federal Republic of additional brake lights allowed, which are arranged at the rear of a vehicle, mostly within the rear window are. They are usually at eye level with the driver of the vehicle behind.

These additional brake lights light up when the brake system is actuated and signal more strongly that the vehicle in front is braking. With the vehicle stationary and activated brakes, these additional brake lights lead to a strong one at night Blinding of the driver of the vehicle behind it. Considerations have already been given for this reason to ban these additional brake lights again or somehow to defuse? t.

The use of such a back pulse switch is advisable here Additional brake lights are activated by means of this back pulse switch at the moment of total Standstill of the vehicle. switched off.

At the sgt. Stop-start systems (electronics) will be longer at the moment Stopping "rg-n traffic jams, be it traffic lights, railway barriers etc. the engine of Hand-switched off and restarted using various methods when the There is a saving in fuel costs and the Pollutants reduced.

The back pulse switch is used to turn off the engine, by closing the so-called idle shut-off valve on the carburettor engine, for example. Of the The engine then stops immediately. The process is also similar for injection systems applicable.

Due to the evaluation of the return pulse, the driver becomes strong relieved, nevertheless he still has an influence on the return impulse through corresponding Applying the brake.

Uncontrolled shutdowns are avoided by having a link FUND link with the brake light switch or reverses the return pulse delayed a few seconds.

The return pulse signal controls e.g. a monoflop to which after the The set delay time generates an output pulse.

Such switches operated by back pulse build in their mechanical ones Dimensions are very small, so they can be integrated into a print or even an LSI permit. Microphones with the dimensions 0.4 x0.4 mm are already integrated in LSI today.

The installation position and the direction of travel are indicated by symbols on the Protective housing made visible.

Such a switch not only relieves the driver, it is like before also reports in a fuel-efficient and environmentally friendly way. The cost is much lower such as sensors that are often built into the speedometer cable. The latter does a lot Difficulties in retrofitting.

A two-wire version is used to switch the additional brake lights Suitable, it is simply plugged into the power supply for the additional brake lights It can also be integrated into the luminaire housing.

Claims (1)

Claim Claim 1 electromechanical or electronic Switch consisting of a seismic mass which is so arranged in a vehicle is that by means of the movement of the seismic mass when the Vehicle generating an electrical pulse is characterized in that this electrical impulse from the back acceleration of the vehicle at a complete standstill of the wheels, speed of the wheels in relation to the roadway = 0, is obtained.