Patent US4275951A successfully refreshed from Google Patents.
US3744851A
Expired / Lapsed
US
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Brake force regulating system for vehicles, especially for motor vehicles
Assignee: Daimler Benz AG
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Filing: 1970-07-07
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Granted: 1973-07-10
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Expires: 1990-07-07
Abstract
Abstract A brake force control system for vehicles, in particular motor vehicles in which a sensing device is coordinated to each wheel for detecting its rotational speed condition, whose signals influence the brakes when exceeding or dropping below a predetermined threshold value; the sensing devices detect both the wheel slippage and also the acceleration of a wheel and the measuring magnitudes representing slippage and acceleration are combined into a signal magnitude representing the control pulse for the brakes.
Inventors
- 👤 M Burckhardt
- 👤 H Krohn
- 👤 H Florus
- 👤 H Grossner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:35
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/176; B60T8/1761; B60T8/17613; B60T8/32; B60T8/88; B60T8/885
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
149 words
A brake control system for the brakes of vehicles in which a sensing means coordinated to each wheel for determining its rotational condition influences the Brakes when a predetermined threshold value is exceeded or dropped below, each sensing means includes means responsive to the speed of the wheel for providing measuring magnitudes in the form of first, second and third signals representing wheel slippage, acceleration and deceleration, respectively, said means responsive to the speed of the wheel providing the first signal magnitude representing wheel slippage by a comparison with a comparison standard representing the speed of the fastest wheel, threshold circuit means for each of these signals for providing an output signal indicative of whether the threshold value has been exceeded or not, and means for combining the output signals of said threshold circuit means to provide an output signal which serves as a control signal for the brakes.
Claim 2
Dependent Claim
149 words
A brake control system for the brakes of vehicles in which a sensing means coordinated to each wheel for determining its rotational condition influences the Brakes when a predetermined threshold value is exceeded or dropped below, each sensing means includes means responsive to the speed of the wheel for providing measuring magnitudes in the form of first, second and third signals representing wheel slippage, acceleration and deceleration, respectively, said means responsive to the speed of the wheel providing the first signal magnitude representing wheel slippage by a comparison with a comparison standard representing the speed of the fastest wheel, threshold circuit means for each of these signals for providing an output signal indicative of whether the threshold value has been exceeded or not, and means for combining the output signals of said threshold circuit means to provide an output signal which serves as a control signal for the brakes.
Claim 3
Dependent Claim
61 words
A brake force control system according to claim 1, characterized in that the measuring magnitude which is proportional to the rotational speed and is derived from the corresponding sensing means, serves, on the one hand, for the formation of the measuring magnitude representing the slippage and, on the other, for the formation of the measuring magnitude representing the acceleration by differentiation.
Claim 4
Dependent Claim
45 words
A brake force control system according to claim 2, characterized by comparison means operatively connected to said sensing means for producing the measuring magnitude representing the slippage and differentiating means operatively connected with the corresponding sensing means for forming the measuring magnitude representing the acceleration.
Claim 5
Dependent Claim
25 words
A brake force control system according to claim 2, characterized in that a frequency generator means is drivingly connected with each wheel as sensing means.
Claim 6
Dependent Claim
22 words
A brake force control system according to claim 4, characterized in that the frequency generator means is arranged at a respective wheel.
Claim 7
Dependent Claim
79 words
A brake force control system according to claim 4, characterized in that a frequency voltage converter means is operatively connected with each frequency generator means, the outputs from said frequency voltage converter means being connected together by way of diodes to a point for forming the maximum voltage representing the speed of the fastest wheel, while the outputs of said frequency voltage converter means are also operatively connected with differentiator means in by-passing relationship to the maximum voltage point.
Claim 8
Dependent Claim
50 words
A brake force control system according to claim 6, characterized in that the maximum voltage prevailing at the maximum voltage point is subdivided at the ratio of the desired response condition by resistance means and a partial voltage is fed to a differential amplifier means constructed as threshold circuit means.
Claim 9
Dependent Claim
45 words
A brake force control system according to claim 7, characterized in that each differentiator means is connected with its output to two parallel frequency weighting means which, in their turn, are each operatively connected with a respective differential amplifier means constructed as threshold circuit means.
Claim 10
Dependent Claim
22 words
A brake force control system according to claim 8, characterized in that the frequency weighting means for deceleration and acceleration are different.
Claim 11
Dependent Claim
66 words
A brake force control system according to claim 9, characterized in that one threshold circuit means each for slippage, for acceleration and for deceleration is operatively associated with each adjusting valve means present in a respective brake circuit, the output signals of the three threshold circuit means being interconnected by combining means in the form of a logic circuit means according to a predetermined logic arrangement.
Claim 12
Dependent Claim
30 words
A brake force control system according to claim 10, characterized in that the threshold circuit means are differential amplifier means for the slippage, for the acceleration and for the deceleration.
Claim 13
Dependent Claim
36 words
A brake force control system according to claim 10, characterized in that the logic circuit means includes integrated circuits with a NOR-element having three inputs and a NOR-elemEnt having two inputs for each valve adjusting means.
Claim 14
Dependent Claim
69 words
A brake force control system according to claim 12, characterized in that the output of each threshold circuit means is connected with one input of the NOR-element having three inputs whose output is connected with one input of the NOR-element having two inputs while the second input of the NOR-element having two inputs is operatively connected with the differential amplifier means of the threshold circuit means representing the acceleration.
Claim 15
Dependent Claim
38 words
A brake force control system according to claim 13, characterized by a safety installation for continuously monitoring and supervising the control system which prevents a transmission of signals to the adjusting valve means in case of erroneous signals.
Claim 16
Dependent Claim
38 words
A brake force control system according to claim 14, characterized in that the adjusting valve means for the valves of the brakes are so actuated in case of erroneous signals that the brakes operate in the normal manner.
Claim 17
Dependent Claim
46 words
A brake force control system according to claim 15, characterized in that the safety installation includes an electric logic circuit means operatively connected between an output transistor and its corresponding adjusting valve means which de-energizes the adjusting valve means in case of response of its circuit.
Claim 18
Dependent Claim
22 words
A brake force control system according to claim 16, characterized in that the adjusting valve means are solenoid valves which are de-energized.
Claim 19
Dependent Claim
47 words
A brake force control system according to claim 16, characterized in that test program means are provided for applying signals to the control system with non-actuated brakes for producing output control signals by the simulated rotational speed changes thereof which are continuously monitored by the safety installation.
Claim 20
Dependent Claim
25 words
A brake force control system according to claim 1, characterized in that a frequency generator means is drivingly connected with each wheel as sensing means.
Claim 21
Dependent Claim
22 words
A brake force control system according to claim 19, characterized in that the frequency generator means is arranged at a respective wheel.
Claim 22
Dependent Claim
79 words
A brake force control system according to claim 19, characterized in that a frequency voltage converter means is operatively connected with each frequency generator means, the outputs from said frequency voltage converter means being connected together by way of diodes to a point for forming the maximum voltage representing the speed of the fastest wheel, while the outputs of said frequency voltage converter means are also operatively connected with differentiator means in by-passing relationship to the maximum voltage point.
Claim 23
Dependent Claim
50 words
A brake force control system according to claim 21, characterized in that the maximum voltage prevailing at the maximum voltage point is subdivided at the ratio of the desired response condition by resistance means and a partial voltage is fed to a differential amplifier means constructed as threshold circuit means.
Claim 24
Dependent Claim
45 words
A brake force control system according to claim 22, characterized in that each differentiator means is connected with its output to two parallel frequency weighting means which, in their turn, are each operatively connected with a respective differential amplifier means constructed as threshold circuit means.
Claim 25
Dependent Claim
22 words
A brake force control system according to claim 23, characterized in that the frequency weighting means for deceleration and acceleration are different.
Claim 26
Dependent Claim
67 words
A brake force control system according to claim 1, characterized in that one threshold circuit means each for slippage, for acceleration and for deceleration is separately operatively associated with each adjusting valve means present in a respective brake circuit, the output signals of the three threshold circuit means being interconnected by combining means in the form of a logic circuit means according to a predetermined logic arrangement.
Claim 27
Dependent Claim
30 words
A brake force control system according to claim 25, characterized in that the threshold circuit means are differential amplifier meAns for the slippage, for the acceleration and for the deceleration.
Claim 28
Dependent Claim
35 words
A brake force control system according to claim 25, characterized in that the logic circuit means includes integrated circuits with a NOR-element having three inputs and a NOR-element having two inputs for each adjusting means.
Claim 29
Dependent Claim
69 words
A brake force control system according to claim 27, characterized in that the output of each threshold circuit means is connected with one input of the NOR-element having three inputs whose output is connected with one input of the NOR-element having two inputs while the second input of the NOR-element having two inputs is operatively connected with the differential amplifier means of the threshold circuit means representing the acceleration.
Claim 30
Dependent Claim
38 words
A brake force control system according to claim 1, characterized by a safety installation for continuously monitoring and supervising the control system which prevents a transmission of signals to an adjusting valve means in case of erroneous signals.
Claim 31
Dependent Claim
38 words
A brake force control system according to claim 27, characterized in that the adjusting valve means for the valves of the brakes are so actuated in case of erroneous signals that the brakes operate in the normal manner.
Claim 32
Dependent Claim
45 words
A brake force control system according to claim 29, characterized in that the safety installation includes an electric logic circuit means operatively connected between an output transistor and its corresponding adjusting valve means which de-energizes the adjusting means in case of response of its circuit.
Claim 33
Dependent Claim
47 words
A brake force control system according to claim 31, characterized in that test program means are provided for applying signals to the control system with non-actuated brakes for producing output control signals by the simulated rotational speed changes thereof which are continuously monitored by the safety installation.
References Cited (Backward Citations)
US3245213A
Cited
US3275384A
Cited
US3556610A
Cited
US3482887A
Cited
US3494671A
Cited
US3544172A
Cited
US3556611A
Cited
US3547501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |