Boots – shoes – and leggings
Patent
1982-12-27
1984-10-02
Truhe, J. V.
Boots, shoes, and leggings
303 96, 303 97, 246182B, 246182C, B60T 810
Patent
active
044751591
DESCRIPTION:
BRIEF SUMMARY
The invention relates to vehicle anti-skid systems, and methods of vehicle control, and more particularly to vehicle operating data suitable in such systems and methods.
BACKGROUND
Numerous anti-ski brake systems for vehicles are already known, in which vehicle operating condition parameters are detected by transducers and processed in an evaluation circuit into control signals for influencing the braking pressure whenever predetermined operating conditions arise, particularly those having to do with the slip that exists between the wheel and the road surface.
Anti-skid brake systems of this kind do provide vehicles thus equipped with superior braking performance as compared with vehicles having conventional brakes; on the other hand, however, it is difficult to reconstruct the course of events leading up to an accident should vehicles equipped with anti-skid brake systems be involved in the accident, because such vehicles leave practically no skid marks. The reason for this is that the usual anti-skid brake systems establish an amount of slip between the wheel and the road surface which does not quite result in a relative speed between wheel and road surface such as to cause the rolling tire to leave a skid mark.
It is an object to provide a method in which data arising due to operation of an anti-skid system, particularly under emergency conditions, can be stored or reconstructed so that, in case of accident, a reconstruction of the operating conditions, speeds, etc. of the vehicle having the automatic anti-skid braking system can be reconstructed; and, preferably, to so arrange the storage system that another vehicle could be commanded to operate in similar manner, for example under testing conditions, so that similar accidents can be avoided at a future time.
Briefly, the anti-skid or anti-brake lock system provides an output signal when it is effective, that is, when it provides control signals to be brakes of the vehicle. When such control signals controlling the brakes of the vehicle are generated, the signals are stored, for example in an electronic memory which may be part of a removable storage element so that the stored data can be analyzed at a later time, either, in case of accident, by police or courts or, for purposes of improvement, under testing conditions. In accordance with a feature of the invention, the storage of braking data is carried out by releasing a visible marker, such as paint or the like, on the pavement when the control signals applied to the brakes by the anti-skid system reach a certain level, or were initiated at predetermined speeds, the marking on the pavement then being similar to skid marks which, due to the operation of the anti-skid system, would not be visible or would not occur on the pavement.
In a preferred embodiment of the invention, a storage of the operating condition parameters is performed only when an evaluation circuit of the anti-skid brake system responds and, at the same time, a predetermined limiting value for deceleration is exceeded. As a result, a particular advantage is that unnecessary markings on the road surface are avoided, since storing of operating condition parameters is not required every time braking occurs with an anti-skid brake system in effect. In a further embodiment of the invention, storage is put into effect only if either the brake light switch or a brake pressure transducer responds. Thus further assurance is provided that on the one hand, storage of the operating condition parameters or marking of the road surface is performed only when braking has been initiated, while on the other hand it is assured that these processes will take place even if either the brake light switch or the brake pressure transducer is defective.
Furthermore, in accordance with a further embodiment of the invention, marking of the road surface is performed under critical operating conditions in such a manner that markings whose length is constant in terms of time are applied to the road surface; thus the length of the markings makes it possible to c
REFERENCES:
patent: 4114957 (1978-09-01), Eichhorst
patent: 4181943 (1980-01-01), Mercer et al.
"DKF", Issue 87, p. 14 and FIG. 8.
"Verkehrsunfall" (Traffic Accident) May 79, pp. 101-106.
Bosch Technische Berichte, Antiblockiersystem (ABS), vol. 7, Issue 2.
Gerstenmaier Jurgen
Leiber Heinz
Stumpe Werner
Bergmann Saul M.
Robert & Bosch GmbH
Truhe J. V.
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