Circuit configuration for brake systems with anti-lock control and/or traction slip control

A circuit configuration for vehicular brake systems with slip control, equipped with wheel sensors for generating electric signals representative of the wheel rotational behavior, with electronic circuits for conditioning, logically combining and processing the sensor signals and including control means for generating slip control signals, with circuits cooperating with said control means for the cornering identification and for generating signals characteristic of cornering and for comparing these signals with the vehicle speed, wherein the circuits for generating the cornering signals are provided with means including circuit branch means for ascertaining a difference speed signal which represents the differential speed between the wheels of a vehicle axle, and with additional circuit branch means for determining a system-inherent error signal which is independent of the instantaneous cornering action and which are utilized when evaluating the speed difference signals and when ascertaining the cornering signals, including means for ascertaining the discrepancy in percent of the speed of one wheel from the speed of the second wheel of the same axle for defining the speed difference signal, wherein for defining the speed difference signal, the difference in speed between the wheels of one axle is standardized by division by a wheel speed, wherein for the determination of the error signal, the speed difference signal or the standardized differential speed is supplied to a low pass having a long time constant in comparison with the duration of conventional cornering, wherein said low pass comprises a low-pass filter having a switchable time constant in which change-over to a still longer time constant will be effected in the presence of a cornering signal.

A circuit configuration for vehicular brake systems with slip control, equipped with wheel sensors for generating electric signals representative of the wheel rotational behavior, with electronic circuits for conditioning, logically combining and processing the sensor signals and including control means for generating slip control signals, with circuits cooperating with said control means for the cornering identification and for generating signals characteristic of cornering and for comparing these signals with the vehicle speed, wherein the circuits for generating the cornering signals are provided with means including circuit branch means for ascertaining a difference speed signal which represents the differential speed between the wheels of a vehicle axle, and with additional circuit branch means for determining a system-inherent error signal which is independent of the instantaneous cornering action and which are utilized when evaluating the speed difference signals and when ascertaining the cornering signals, including means for ascertaining the discrepancy in percent of the speed of one wheel from the speed of the second wheel of the same axle for defining the speed difference signal, wherein for defining the speed difference signal, the difference in speed between the wheels of one axle is standardized by division by a wheel speed, wherein for the determination of the error signal, the speed difference signal or the standardized differential speed is supplied to a low pass filter having a long time constant in comparison with the duration of conventional cornering, wherein during travel straight ahead, the low-pass filter is dimensioned to a time constant of 3- to 120 seconds and is switched over to a time constant of 150 to 300 seconds.