US3776604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital type brake control device
Assignee: Aisin Corp
•
Filing: 1971-12-30
•
Granted: 1973-12-04
•
Expires: 1991-12-30
Abstract
Abstract Digital type brake control devices, each comprising a suitable combination of a first block adapted to detect rotational conditions of rotating wheels, a second block comprising a clock pulse circuit and producing a control signal, a third block comprising a computation circuit, a fourth block comprising a sensing pulse difference setting circuit, a fifth block comprising a compensation circuit for compensating a pulse difference computation, a sixth block comprising a circuit for limiting time period of a pressure reducing signal, and a seventh block comprising a circuit for driving a valve adapted to reduce brake oil pressure, said blocks being connected and arranged so that number of pulses obtained by the first block is counted in accordance with the control signal produced by the clock pulse circuit of the second block and the brake pressure is controlled by the circuit of the seventh block through the circuit of the sixth block in accordance with signals obtained by the circuit of the third and fourth blocks. In the above improved devices, a ''''nand'''' element is further connected in the clock pulse generating circuit or a circuit for limiting time period of the pressure reducing signal thereby to provide a circuit adapted to limit the time period of the pressure reducing signal.
Inventors
- 👤 K Takayama
- 👤 K Kuwana
- 👤 J Ooya
- 👤 K Oomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:49
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/176; B60T8/1763; B60T8/17633
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
193 words
In a digital type brake control device comprising a first block adapted to detect the rotational conditions of rotating wheels, a second block comprising a clock pulse circuit and producing control signals, a third block comprising a computation circuit, a seventh block comprising a circuit for driving a valve adapted to reduce brake oil pressure, said blocks being connected and arranged so that the number of pulses obtained by the first block is counted in accordance with the control signals produced by the clock pulse circuit of the second block and brake pressure is controlled by the circuit of the seventh block in accordance with signals obtained by the circuit of the third block; an improvement characterized by that said first block comprises sensors which produce respectively signals corresponding to rotational speeds of the wheels, wave-form-shaping circuits which are respectively connected to said sensors and carry out respectively the wave-form-shaping of the output signals of said sensors, and an exclusive ''''OR'''' circuit connected to said waveform-shaping circuits so as to receive output signals of said wave-form-shaping circuit for producing an output equal to the sum of the output signals of said wave-form-shaping circuits.
Claim 2
Dependent Claim
193 words
In a digital type brake control device comprising a first block adapted to detect the rotational conditions of rotating wheels, a second block comprising a clock pulse circuit and producing control signals, a third block comprising a computation circuit, a seventh block comprising a circuit for driving a valve adapted to reduce brake oil pressure, said blocks being connected and arranged so that the number of pulses obtained by the first block is counted in accordance with the control signals produced by the clock pulse circuit of the second block and brake pressure is controlled by the circuit of the seventh block in accordance with signals obtained by the circuit of the third block; an improvement characterized by that said first block comprises sensors which produce respectively signals corresponding to rotational speeds of the wheels, wave-form-shaping circuits which are respectively connected to said sensors and carry out respectively the wave-form-shaping of the output signals of said sensors, and an exclusive ''''OR'''' circuit connected to said waveform-shaping circuits so as to receive output signals of said wave-form-shaping circuit for producing an output equal to the sum of the output signals of said wave-form-shaping circuits.
Claim 3
Dependent Claim
95 words
A digital type brake control device as claimed in claim 1, in which said device comprises further, in combination, a fourth block comprising a sensing pulse difference setting circuit, a fifth block comprising a compensation circuit for compensating a pulse difference computation, and a sixth block comprising a circuit for limiting time period of a pressure reducing signal, and controlling of the brake pressure by the circuit of the seventh block is carried out through the circuit of the sixth block in accordance with signals obtained by the circuits of the third and fourth blocks.
Claim 4
Dependent Claim
195 words
In a digital type brake control device comprising, in combination, a first block adapted to detect the rotational conditions of rotating wheels, a seCond block comprising a clock pulse circuit and producing control signals, a third block comprising a computation circuit which counts the number of pulses produced by said first block in accordance with the control signals produced by said second block, and a seventh block comprising a circuit for driving a valve adapted to reduce brake oil pressure and adapted to control the brake pressure in accordance with the signal obtained by said third block; an improvement comprising a fifth block comprising a compensation circuit for compensating a pulse difference computation, said compensation circuit comprising first, second and third ''''nand'''' elements input sides of said first and second ''''nand'''' elements being connected to respective output sides of a decoder circuit and a counter circuit which are included in the clock-pulse generating circuit of the second block, output sides of said first and second ''''nand'''' elements being connected to input side of said third ''''nand'''' element, and output side of said third ''''nand'''' element being connected to input gate circuit of the third block.
Claim 5
Dependent Claim
195 words
In a digital type brake control device comprising, in combination, a first block adapted to detect the rotational conditions of rotating wheels, a seCond block comprising a clock pulse circuit and producing control signals, a third block comprising a computation circuit which counts the number of pulses produced by said first block in accordance with the control signals produced by said second block, and a seventh block comprising a circuit for driving a valve adapted to reduce brake oil pressure and adapted to control the brake pressure in accordance with the signal obtained by said third block; an improvement comprising a fifth block comprising a compensation circuit for compensating a pulse difference computation, said compensation circuit comprising first, second and third ''''nand'''' elements input sides of said first and second ''''nand'''' elements being connected to respective output sides of a decoder circuit and a counter circuit which are included in the clock-pulse generating circuit of the second block, output sides of said first and second ''''nand'''' elements being connected to input side of said third ''''nand'''' element, and output side of said third ''''nand'''' element being connected to input gate circuit of the third block.
Claim 6
Dependent Claim
201 words
In a digital type brake control device comprising, in combination, a first block adapted to detect the rotational conditions of rotating wheels, a second block comprising a clock pulse circuit and producing control signals, a third block comprising a computation circuit which counts the number of pulses produced by said first block in accordance with the control signals produced by said second block, and a seventh block comprising a circuit for driving a valve adapted to reduce brake oil pressure and adapted to control the brake pressure in accordance with the signal obtained by said third block; an improvement comprising a compensation circuit adapted to compensate the pulse difference counting so as to make it possible to adjust the time during which the input gate of the third block is opened, said compensation circuit comprising ''''nand'''' elements connected respectively in parallel to a decoder circuit and a counter circuit which are included in the clock pulse generating circuit of the second block, another ''''nand'''' element input sides of which are connected to output sides of said former ''''nand'''' elements and a brake oil pressure switch, output side of said another ''''nand'''' element being connected to input side of said third block.
Claim 7
Dependent Claim
201 words
In a digital type brake control device comprising, in combination, a first block adapted to detect the rotational conditions of rotating wheels, a second block comprising a clock pulse circuit and producing control signals, a third block comprising a computation circuit which counts the number of pulses produced by said first block in accordance with the control signals produced by said second block, and a seventh block comprising a circuit for driving a valve adapted to reduce brake oil pressure and adapted to control the brake pressure in accordance with the signal obtained by said third block; an improvement comprising a compensation circuit adapted to compensate the pulse difference counting so as to make it possible to adjust the time during which the input gate of the third block is opened, said compensation circuit comprising ''''nand'''' elements connected respectively in parallel to a decoder circuit and a counter circuit which are included in the clock pulse generating circuit of the second block, another ''''nand'''' element input sides of which are connected to output sides of said former ''''nand'''' elements and a brake oil pressure switch, output side of said another ''''nand'''' element being connected to input side of said third block.
Claim 8
Dependent Claim
77 words
A digital type brake control device as claimed in claim 4, in which said device comprises further, in combination, a fourth block comprising a sensing pulse difference setting circuit, and a sixth block comprising a circuit for limiting time period during which a pressure reducing signal is established, and controlling of the brake oil pressure by the circuit of the seventh block is carried out in accordance with the signals obtained by said third and fourth blocks.
Claim 9
Dependent Claim
295 words
In a digital type brake control device comprising, in combination, a first block adapted to detect the rotational conditions of rotating wheels, a second block comprising a clock pulse circuit and producing control signals, a third block comprising a computation circuit which counts the number of pulses produced by said first block in accordance with the control signals produced by said second block, and a seventh block comprising a circuit for driving a valve adapted to reduce brake oil pressure and adapted to control the brake pressure in accordance with the signals obtained by said third block; an improvement characterized by that said third block comprises a first flip-flop circuit adapted to count successively the number of pulses corresponding to a revolution within a unit time period in each of the wheels, said counting being made in response to said control signals produced by said second block, at least one group of the second flip-flop circuits which are adapted to be controlled by said control signals produced by said second block and which are connected so that the number of pulses counted at said first flip-flop circuit is successively transferred to said second flip-flop circuits upon lapse of said unit time period, and a third flip-flop circuit adapted to be controlled by said control signals produced by said second block so as to receive the number of pulses produced by said second flip-flop circuit and adapted to count number of pulses corresponding respectively to revolutions, within a predetermined time period, of the wheels, thereby to detect difference between pulse number counted during said unit time period by means of said first flip-flop circuit and pulse number counted during said predetermined time period which is delayed from said unit time period by a certain time period.
Claim 10
Dependent Claim
295 words
In a digital type brake control device comprising, in combination, a first block adapted to detect the rotational conditions of rotating wheels, a second block comprising a clock pulse circuit and producing control signals, a third block comprising a computation circuit which counts the number of pulses produced by said first block in accordance with the control signals produced by said second block, and a seventh block comprising a circuit for driving a valve adapted to reduce brake oil pressure and adapted to control the brake pressure in accordance with the signals obtained by said third block; an improvement characterized by that said third block comprises a first flip-flop circuit adapted to count successively the number of pulses corresponding to a revolution within a unit time period in each of the wheels, said counting being made in response to said control signals produced by said second block, at least one group of the second flip-flop circuits which are adapted to be controlled by said control signals produced by said second block and which are connected so that the number of pulses counted at said first flip-flop circuit is successively transferred to said second flip-flop circuits upon lapse of said unit time period, and a third flip-flop circuit adapted to be controlled by said control signals produced by said second block so as to receive the number of pulses produced by said second flip-flop circuit and adapted to count number of pulses corresponding respectively to revolutions, within a predetermined time period, of the wheels, thereby to detect difference between pulse number counted during said unit time period by means of said first flip-flop circuit and pulse number counted during said predetermined time period which is delayed from said unit time period by a certain time period.
Claim 11
Dependent Claim
88 words
A digital type brake control device as claimed in claim 6, in which said device comprises further, in combination, a fourth block comprising a sensing pulse difference setting circuit, a fifth block comprising a compensation circuit for compensating a pulse difference computation, and a sixth block comprising a circuit for limiting time period during which a pressure reducing signal is established, controlling of the brake pressure is carried out by the circuit of the seventh block in accordance with the signals obtained by said third and fourth blocks.
Claim 12
Dependent Claim
205 words
In a digital type brake control device comprising, in combination, a first block adapted to detect the rotational conditions of rotating wheels, a second block comprising a clock pulse circuit and producing control signals, a third block comprising a computation circuit which counts the number of pulse produced by said first block in accordance with the control signals produced by said second block, a fourth block comprising a sensing pulse difference setting circuit, a sixth block comprising a circuit for limiting time during which a pressure reducing signal is established, and a seventh block comprising a circuit for driving a valve adapted to reduce brake oil pressure and adapted to control the brake pressure in accordance with the signals obtained by said third and fourth blocks; an improvement according to which the circuit adapted to limit a time period of a pressure reducing signal and included in the sixth block comprises a ''''nand'''' element and a monostable multivibrator circuit, input side of said ''''nand'''' element being connected to output side of a flip-flop circuit included in the computation circuit of the third block through said monostable multivibrator circuit, and output side of said ''''nand'''' element being connected to an input terminal of said flip-flop circuit.
Claim 13
Dependent Claim
205 words
In a digital type brake control device comprising, in combination, a first block adapted to detect the rotational conditions of rotating wheels, a second block comprising a clock pulse circuit and producing control signals, a third block comprising a computation circuit which counts the number of pulse produced by said first block in accordance with the control signals produced by said second block, a fourth block comprising a sensing pulse difference setting circuit, a sixth block comprising a circuit for limiting time during which a pressure reducing signal is established, and a seventh block comprising a circuit for driving a valve adapted to reduce brake oil pressure and adapted to control the brake pressure in accordance with the signals obtained by said third and fourth blocks; an improvement according to which the circuit adapted to limit a time period of a pressure reducing signal and included in the sixth block comprises a ''''nand'''' element and a monostable multivibrator circuit, input side of said ''''nand'''' element being connected to output side of a flip-flop circuit included in the computation circuit of the third block through said monostable multivibrator circuit, and output side of said ''''nand'''' element being connected to an input terminal of said flip-flop circuit.
Claim 14
Dependent Claim
40 words
A digital type brake control device as claimed in claim 8, in which said device comprises further, in combination, a fifth block comprising a compensation circuit for compensating a pulse difference computation in the computation circuit of the third block.
Claim 15
Dependent Claim
222 words
In a digital type brake control device comprising, in combination, a first block adapted to detect the rotational conditions of rotating wheels, a second block comprising a clock pulse circuit and producing control signals, a third block comprising a computation circuit which counts the number of pulses produced by said first block in accordance with the control signals produced by said second block, a fourth block comprising a sensing pulse difference setting circuit, a sixth block comprising a circuit for limiting time during which a pressure reducing signal is established, and a seventh block comprising a circuit for driving a valve adapted to reduce brake oil pressure and adapted to control the brake pressure in accordance with the signals obtained by said third and fourth blocks; an improvement according to which the circuit adapted to limit a time period of a pressure reducing signal and included in the sixth block comprises a counter including input terminals connected respectively to the ''''nand'''' element, one output terminal of the counter of said second block and output terminal of the flip-flop circuit included in the third block and adapted to produce brake-pressure controlling signals, plural output terminals of said counter being connected to said ''''nand'''' element and output side of this ''''nand'''' element being connected to said flip-flop circuit which produces the brake-pressure controlling signal.
Claim 16
Dependent Claim
222 words
In a digital type brake control device comprising, in combination, a first block adapted to detect the rotational conditions of rotating wheels, a second block comprising a clock pulse circuit and producing control signals, a third block comprising a computation circuit which counts the number of pulses produced by said first block in accordance with the control signals produced by said second block, a fourth block comprising a sensing pulse difference setting circuit, a sixth block comprising a circuit for limiting time during which a pressure reducing signal is established, and a seventh block comprising a circuit for driving a valve adapted to reduce brake oil pressure and adapted to control the brake pressure in accordance with the signals obtained by said third and fourth blocks; an improvement according to which the circuit adapted to limit a time period of a pressure reducing signal and included in the sixth block comprises a counter including input terminals connected respectively to the ''''nand'''' element, one output terminal of the counter of said second block and output terminal of the flip-flop circuit included in the third block and adapted to produce brake-pressure controlling signals, plural output terminals of said counter being connected to said ''''nand'''' element and output side of this ''''nand'''' element being connected to said flip-flop circuit which produces the brake-pressure controlling signal.
Claim 17
Dependent Claim
195 words
In a digital type brake control device comprising, in combination, a first block adapted to detect the rotational conditions of rotating wheels, a second block comprising a clock pulse circuit and producing control signals, a third block comprising a computation circuit which counts the number of pulses produced by said first block in accordance with the control signals produced by said second block, a fourth block comprising a sensing pulse difference setting circuit, and a seventh block comprising a circuit for driving a valve adapted to reduce brake oil pressure and adapted to control the brake pressure in accordance with the signals obtained by said third and fourth blocks; an improvement comprising a sensing pulse difference setting circuit included in the fourth block and comprises a first ''''nand'''' element being connected to respective output sides of decoders included in the clock pulse generating circuit of the second block and output side of said first ''''nand'''' element and output side of the flip-flop circuit included in the computation circuit of the third block are connected to input side of said second ''''nand'''' element, output side of said second ''''nand'''' element being connected to said third block.
Claim 18
Dependent Claim
195 words
In a digital type brake control device comprising, in combination, a first block adapted to detect the rotational conditions of rotating wheels, a second block comprising a clock pulse circuit and producing control signals, a third block comprising a computation circuit which counts the number of pulses produced by said first block in accordance with the control signals produced by said second block, a fourth block comprising a sensing pulse difference setting circuit, and a seventh block comprising a circuit for driving a valve adapted to reduce brake oil pressure and adapted to control the brake pressure in accordance with the signals obtained by said third and fourth blocks; an improvement comprising a sensing pulse difference setting circuit included in the fourth block and comprises a first ''''nand'''' element being connected to respective output sides of decoders included in the clock pulse generating circuit of the second block and output side of said first ''''nand'''' element and output side of the flip-flop circuit included in the computation circuit of the third block are connected to input side of said second ''''nand'''' element, output side of said second ''''nand'''' element being connected to said third block.
Claim 19
Dependent Claim
51 words
A digital type brake control device as claimed in claim 11, in which said device comprises further, in combination, a fifth block comprising a compensation circuit for compensating a pulse difference computation and a sixth block comprising a circuit for limiting time period during which a pressure reducing signal is established.
Claim 20
Dependent Claim
41 words
A digital type brake control device as claimed in claim 11, in which number of the input terminals in the input side of the first ''''nand'''' element is made to be adjusted in accordance with value of the brake oil pressure.
References Cited (Backward Citations)
US3586385A
Cited
US3653727A
Cited
US3589776A
Cited
US3620577A
Cited
US3608978A
Cited
US3679894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |