Patent US3652135A successfully refreshed from Google Patents.
US3652135A
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US
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Method and arrangement for preventing the locking of wheels of a commercial vehicle
Assignee: Robert Bosch GmbH
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Filing: 1969-11-21
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Granted: 1972-03-28
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Expires: 1989-11-21
Abstract
Abstract Pulses generated in synchronism with the rotation of the wheel are reshaped into measuring pulses having a steep leading edge and a slowly decreasing trailing edge. The pulses overlap. The instantaneous value of a measuring pulse at the beginning of a subsequent measuring pulse is compared with the corresponding value of a preceding measuring pulse, and a terminating signal terminating the application of the brakes, is furnished when the difference between two sequential so-determined instantaneous values exceed a predetermined difference.
Inventors
- 👤 Gunther Baumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:19
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/56; B; B60; B60T; B60T8/00; B60T8/17; B60T8/1701; B60T8/1703; B60T8/32; B60T8/321; B60T8/329; B60T8/72
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
190 words
Arrangement for preventing locking of a wheel of a vehicle during a braking process, comprising, in combination, pulse generating means for generating a pulse sequence in synchronism with the rotation of said wheel; pulse shaping means for shaping the pulses in said sequence into measuring pulses having substantially identical leading portions and independently of speed substantially the same peak amplitudes and having trailing portions, the spacing of said pulses depending upon the speed of rotation of said wheel, each of said trailing portions having a portion overlapping in time with a portion of the leading portion of the next sequential one of said measuring pulses; means furnishing measuring signals corresponding to the instantaneous values of overlapping trailing portions of said measuring pulses at predetermined time instants within the corresponding overlapping leading portions of the following measuring pulses; comparing means coMparing at predetermined time intervals sequential measuring signals and generating comparison signals as a function of the differences between sequential measuring signals; and terminating signal furnishing means for terminating the application of the brakes when at least one of said comparison signals corresponds to a difference exceeding a first predetermined difference.
Claim 2
Dependent Claim
190 words
Arrangement for preventing locking of a wheel of a vehicle during a braking process, comprising, in combination, pulse generating means for generating a pulse sequence in synchronism with the rotation of said wheel; pulse shaping means for shaping the pulses in said sequence into measuring pulses having substantially identical leading portions and independently of speed substantially the same peak amplitudes and having trailing portions, the spacing of said pulses depending upon the speed of rotation of said wheel, each of said trailing portions having a portion overlapping in time with a portion of the leading portion of the next sequential one of said measuring pulses; means furnishing measuring signals corresponding to the instantaneous values of overlapping trailing portions of said measuring pulses at predetermined time instants within the corresponding overlapping leading portions of the following measuring pulses; comparing means coMparing at predetermined time intervals sequential measuring signals and generating comparison signals as a function of the differences between sequential measuring signals; and terminating signal furnishing means for terminating the application of the brakes when at least one of said comparison signals corresponds to a difference exceeding a first predetermined difference.
Claim 3
Dependent Claim
77 words
An arrangement as set forth in claim 1, wherein said comparing means comprise first and second monostable circuit means, respectively adapted to stay in the unstable state for a time period corresponding to a first and second applied signal; auxiliary means for switching said monostable circuit means simultaneously into said unstable state; and switching means for alternately applying selected measuring signals to said first and second monostable circuit means for constituting said first and second applied signals.
Claim 4
Dependent Claim
51 words
An arrangement as set forth in claim 2, further comprising first and second comparator storage means connected to the output of said switching means, said first and second storage means respectively having a first and second storage output, said first and second storage output constituting said first and second applied signals.
Claim 5
Dependent Claim
26 words
An arrangement as set forth in claim 3, wherein said first and second storage means each comprise amplifier circuits having integrator circuits in the forward path.
Claim 6
Dependent Claim
34 words
An arrangement as set forth in claim 1, wherein said pulse generating means comprise a reactive circuit; and means for changing the reactance of said reactive circuit abruptly during the rotation of a wheel.
Claim 7
Dependent Claim
14 words
An arrangement as set forth in claim 5, wherein said reactance is an inductance.
Claim 8
Dependent Claim
14 words
An arrangement as set forth in claim 5, wherein said reactance is a capacitance.
Claim 9
Dependent Claim
49 words
An arrangement as set forth in claim 5, wherein said pulse shaping means comprise a capacitor, short time constant means for charging said capacitor, and long time constant discharge means for discharging said capacitor, whereby said measuring pulses comprise a steep leading edge and a slowly decreasing trailing edge.
Claim 10
Dependent Claim
18 words
An arrangement as set forth in claim 8, wherein said long time constant discharge means comprise a resistance.
Claim 11
Dependent Claim
26 words
An arrangement as set forth in claim 9, wherein said resistance is a variable resistance, adapted to change in dependence on the speed of said engine.
Claim 12
Dependent Claim
181 words
Method for preventing locking of a wheel of a vehicle during a braking process, comprising, in combination, the steps of generating a pulse sequence in synchronism with the rotation of said wheel; reshaping the pulses in said sequence into measuring pulses having substantially identical leading portions and independently of speed substantially the same peak amplitudes and having trailing portions, the spacing of said pulses depending upon the speed of rotation of said wheel, each of said trailing portions having a portion overlapping in time with a portion of the leading portion of the next sequential one of said measuring pulses; furnishing measuring signals corresponding to the instantaneous values of overlapping trailing portions of said measuring pulses at predetermined time instants within the corresponding overlapping leading portions of the following measuring pulses; comparing, at predetermined time intervals, sequential measuring signals and generating comparison signals as a function of the difference between sequential measuring signals; and furnishing a terminating signal terminating the application of the brakes when at least one of said comparison signals corresponds to a difference exceeding a first predetermined difference.
Claim 13
Dependent Claim
181 words
Method for preventing locking of a wheel of a vehicle during a braking process, comprising, in combination, the steps of generating a pulse sequence in synchronism with the rotation of said wheel; reshaping the pulses in said sequence into measuring pulses having substantially identical leading portions and independently of speed substantially the same peak amplitudes and having trailing portions, the spacing of said pulses depending upon the speed of rotation of said wheel, each of said trailing portions having a portion overlapping in time with a portion of the leading portion of the next sequential one of said measuring pulses; furnishing measuring signals corresponding to the instantaneous values of overlapping trailing portions of said measuring pulses at predetermined time instants within the corresponding overlapping leading portions of the following measuring pulses; comparing, at predetermined time intervals, sequential measuring signals and generating comparison signals as a function of the difference between sequential measuring signals; and furnishing a terminating signal terminating the application of the brakes when at least one of said comparison signals corresponds to a difference exceeding a first predetermined difference.
Claim 14
Dependent Claim
34 words
A method as set forth in claim 11, further comprising the step of ending the furnishing of said terminating signal when said comparison signal corresponds to a difference less than a second predetermined difference.
Claim 15
Dependent Claim
15 words
A method as set forth in claim 11, wherein said measuring pulses comprise sawtooth pulses.
Claim 16
Dependent Claim
24 words
A metHod as set forth in claim 11, wherein said measuring pulses have a steep leading edge and a relatively slowly decreasing trailing edge.
Claim 17
Dependent Claim
46 words
A method as set forth in claim 14, wherein said predetermined time instants are the time instant at which the instantaneous value of the steep leading edge of a measuring pulse and the slowly decreasing trailing edge of a previous measuring pulse are equal in value.
Claim 18
Dependent Claim
21 words
A method as set forth in claim 11, wherein said predetermined time instants are the beginnings of said following measuring pulses.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |