US4056177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simplified electronic pilot and remote control system for 11/2 stage transmission
Assignee: SRM Hydromekanik AB
•
Filing: 1976-05-07
•
Granted: 1977-11-01
•
Expires: 1996-05-07
Abstract
Abstract A control system is provided for connecting and disconnecting the block up clutch in a hydrodynamic torque converter for a prime mover. The system includes a first means for deriving a signal representative of the input speed of the prime mover, a second means for deriving signal representative the torque setting of the prime mover, and a comparator for comparing the signals and controlling the setting in accordance with that comparison. An output stage includes a relay responsive to the output of the comparator. A number of different embodiments are disclosed.
Inventors
- 👤 Karl Gustav Ahlen
- 👤 Gunnar Wahlsten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:12
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/14; F16H61/143
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
69 words
A control system for connecting and disconnecting the lock-up clutch in a hydrodynamic torque converter for a prime mover, comprising first means for deriving a signal representative of the input speed of the prime mover, second means for deriving a signal representative of the torque setting of the prime mover, and means for comparing the signals and for controlling the setting of the clutch in accordance with that comparison.
Claim 2
Dependent Claim
69 words
A control system for connecting and disconnecting the lock-up clutch in a hydrodynamic torque converter for a prime mover, comprising first means for deriving a signal representative of the input speed of the prime mover, second means for deriving a signal representative of the torque setting of the prime mover, and means for comparing the signals and for controlling the setting of the clutch in accordance with that comparison.
Claim 3
Dependent Claim
45 words
A control system according to claim 1, wherein the system comprises an electronic circuit, said first, speed signal deriving means comprising a speed sensor, and said comparing means comprising a comparator and an output stage including relay means responsive to the output of said comparator.
Claim 4
Dependent Claim
15 words
A control system according to claim 2, wherein the comparator comprises a high gain amplifier.
Claim 5
Dependent Claim
46 words
A control system according to claim 1, wherein said first and second means comprise means for generating respective input signals representative of the input speed and torque setting as a function of time and said comparing means comprises a flip-flop circuit for comparing the input signals.
Claim 6
Dependent Claim
40 words
A control system according to claim 1, wherein said first and second means comprise means for generating input signals representative of the input speed and torque setting as a function of frequency and said comparing means comprise a frequency comparator.
Claim 7
Dependent Claim
39 words
A control according to claim 1, wherein said first and second means comprises means for generating input signals representative of the input speed and torque setting as a function of frequency and said comparing means comprises a phase comparator.
Claim 8
Dependent Claim
40 words
A control system according to claim 1, wherein said first and second means comprises means for generating input signals representative of input speed and throttle position which are in digital form and said respective comparing means comprising a digital comparator.
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) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |