US3736435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for preventing the locking of wheels of motor vehicles
Assignee: Robert Bosch GmbH
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Filing: 1971-12-21
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Granted: 1973-05-29
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Expires: 1991-12-21
Abstract
Abstract A D.C. voltage of amplitude inversely proportional to vehicle speed is directly applied to the second inputs of a first and second comparator stage. The D.C. voltage is also applied to a logarithmic circuit and then differentiated. The output of the differentiator is applied to the first input of the second comparator stage and further, through an inverter, to the first input of the first comparator stage. The outputs of the comparator stages control, through a switching amplifier, the operation of an electrically operated pressure decreasing brake valve.
Inventors
- 👤 D Runge
- 👤 W Gotz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:24
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/176; B60T8/1761; B60T8/17613
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
110 words
In a motor vehicle having an internal combustion engine, an arrangement furnishing an acceleration signal for use as a control for the brakes comprising, in combination, first circuit means coupled to said engine and responsive to the speed thereof, for furnishing a first signal having a first signal amplitude decreasing with increasing engine speed; second circuit means connected to said first circuit means for receiving said first signal and furnishing a second signal having a second signal amplitude varying as a logarithmic function of said first signal amplitude; and differentiation circuit means connected to said second circuit means differentiating said second signal, said sodifferentiated second signal constituting said acceleration signal.
Claim 2
Dependent Claim
110 words
In a motor vehicle having an internal combustion engine, an arrangement furnishing an acceleration signal for use as a control for the brakes comprising, in combination, first circuit means coupled to said engine and responsive to the speed thereof, for furnishing a first signal having a first signal amplitude decreasing with increasing engine speed; second circuit means connected to said first circuit means for receiving said first signal and furnishing a second signal having a second signal amplitude varying as a logarithmic function of said first signal amplitude; and differentiation circuit means connected to said second circuit means differentiating said second signal, said sodifferentiated second signal constituting said acceleration signal.
Claim 3
Dependent Claim
48 words
An arrangement as set forth in claim 1, further comprising brake control means operatively associated with the brakes of said motor vehicle; and first comparator means interconnected between said differentiation means and said brake control means for operating said brake control means in dependence on said acceleration signal.
Claim 4
Dependent Claim
65 words
An arrangement as set forth in claim 2, wherein said first circuit means comprise pulse generator means coupled to a wheel of said motor vehicle for furnishing a pulse sequence having a pulse repetition rate proportional to the speed of said engine; and converter means furnishing a D.C. voltage having an amplitude decreasing with increasing pulse repetition rates, said D.C. voltage constituting said first signal.
Claim 5
Dependent Claim
49 words
An arrangement as set forth in claim 2, wherein said brake control means comprise valve means decreasing the pressure in a brake upon receipt of a brake control signal; and wherein said first comparator means furnish said brake control signal in dependence upon the amplitude of said acceleration signal.
Claim 6
Dependent Claim
39 words
An arrangement as set forth in claim 4, wherein said first comparator means comprise additional differentiation means furnishing a second derivative signal corresponding to the second derivative with respect to time of the speed of said internal combustion engine.
Claim 7
Dependent Claim
28 words
An arrangement as set forth in claim 3, wherein said converter means comprise sawtooth generator means; and peak rectifier means connected in series with said sawtooth generator means.
Claim 8
Dependent Claim
42 words
An arrangement as set forth in claim 6, further comprising monostable circuit means connected between said pulse generator means and said sawtooth generator means, for furnishing a sequence of rectangular pulses having a constant pulse width independent of said pulse repetition rate.
Claim 9
Dependent Claim
54 words
An arrangement as set forth in claim 7, wherein said sawtooth generator means comprise first storage capacitor means, first constant current source means charging said first storage capacitor means in the intervals between said rectangular pulses, and discharge means discharging said first storage capacitor means for the duration of each of said rectangular pulses.
Claim 10
Dependent Claim
17 words
An arrangement as set forth in claim 8, wherein said discharge means comprise first switching transistor means.
Claim 11
Dependent Claim
36 words
An arrangement as set forth in claim 9, wherein said first constant current source means furnishes a current having an amplitude substantially less than the current flowing during the discharge of said first storage capacitor means.
Claim 12
Dependent Claim
44 words
An arrangement as set forth in claim 6, wherein said peak rectifier means comprise first diode means, storage capacitor means connected in series with said first diode means, and constant current source means connected to said storage capacitor means for effecting the discharge thereof.
Claim 13
Dependent Claim
23 words
An arrangement as set forth in claim 11, further comprising decoupling means interconnected between said first diode means and said sawtooth generator means.
Claim 14
Dependent Claim
18 words
An arrangement as set forth in claim 12, wherein said decoupling means comprise an emitter-follower connected transistor stage.
Claim 15
Dependent Claim
44 words
An arrangement as set forth in claim 1, further comprising bandpass amplifier means connected between said second circuit means and said differentiation circuit means, said bandpass amplifier means amplifying signals in a determined frequency range and suppressing frequencies outside of said determined frequency range.
Claim 16
Dependent Claim
29 words
An arrangement as set forth in claim 14, wherein said second circuit means comprise diode means furnishing a voltage varying as a logarithmic function of the current flowing therethrough.
Claim 17
Dependent Claim
39 words
An arrangement as set forth in claim 2, wherein said comparator means comprise a first and second comparator stage, having a first and second comparator output respectively; and first storage means connected to said first and second comparator output.
Claim 18
Dependent Claim
78 words
An arrangement as set forth in claim 16, wherein said first and second comparator stage each have a first and second comparator input; further comprising means connecting said second inputs directly to the output of said first circuit means; inverter means connecting said first input of said first comparator stage to the output of said differentiation circuit means; and means connecting said second input of said second comparator stage directly to the output of said differentiation circuit means.
Claim 19
Dependent Claim
116 words
An arrangement as set forth in claim 16, wherein said first and second comparator stages each comprise a first and second comparator input; further comprising inverter means connected to the output of said differentiation circuit means; additional differentiation means having an input connected to the output of said inverter means and an output connected to said first input of said first comparator stage; means connecting said second input of said first comparator stage directly to ground potential; means connecting said first input of said second comparator stage directly to said output of said differentiation circuit means; and means connecting said second input of said second comparator stage directly to the output of said first circuit means.
Claim 20
Dependent Claim
56 words
An arrangement as set forth in claim 16, wherein said first storage means comprise a first and second storage input respectively connected to said first and second comparator outputs; wherein said brake control means comprise electrically operated valve means; further comprising switching amplifier means connected between said first storage means and said electrically operative valve means.
Claim 21
Dependent Claim
17 words
An arrangement as set forth in claim 19, wherein said first storage means comprises monostable circuit means.
Claim 22
Dependent Claim
39 words
An arrangement as set forth in claim 19, wherein said first storage means comprise bistable circuit means having a bistable circuit output; further comprising monostable feedback circuit means connected from said bistable circuit output to said second storage input.
Claim 23
Dependent Claim
25 words
An arrangement as set forth in claim 19, further comprising low pass filter means interconnected between said first storage means and said switching amplifier means.
Claim 24
Dependent Claim
20 words
An arrangement as set forth in claim 22, wherein said low pass filter means comprise digital low pass filter means.
Claim 25
Dependent Claim
51 words
An arrangement as set forth in claim 22, wherein said low pass filter means comprise switching transistor means connected to the input of said switching amplifier means for short circuiting said input when the repetition rate of pulses at the output of said first storage means exceeds a predetermined repetition rate.
Claim 26
Dependent Claim
87 words
An arrangement as set forth in claim 24, wherein said low pass filter means comprise comparator means having a first and second comparator input and an output; monostable circuit means connecting said second comparator input to said output of said first storage means; means directly connecting said first comparator input of said comparator means to said output of said first storage means; wherein said switching transistor means has a base; and means connecting said output of said comparator means to said base of said switching transistor means.
Claim 27
Dependent Claim
30 words
An arrangement as set forth in claim 25, wherein said means connecting said output of said comparator means to the base of said switching transistor means comprise monostable circuit means.
Claim 28
Dependent Claim
17 words
An arrangement as set forth in claim 2, wherein said first circuit means comprise sample-and-hold circuit means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |