US3752249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined wheel slip limiting and vehicle speed limiting apparatus
Assignee: Motors Liquidation Co
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Filing: 1971-08-27
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Granted: 1973-08-14
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Expires: 1991-08-27
Abstract
Abstract Maximum traction of a vehicle during acceleration is assured by a circuit responsive to signals from driven and non-driven wheel transducers including a frequency comparator for determining the difference in wheel speeds and an electro-vacuum servo motor in the engine throttle linkage responsive to a predetermined wheel speed difference for reducing engine torque output upon excessive slipping of the driven wheels. The non-driven wheel speed signal is limited to a maximum at a predetermined speed so that at higher vehicle speeds a simulated wheel slip signal is generated to reduce engine torque and limit vehicle speed.
Inventors
- 👤 R Gelenius
- 👤 W Levijoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:06
CPC Classifications
B; B60; B60K; B60K28/00; B60K28/10; B60K28/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
182 words
In a vehicle having an engine, a wheel driven by the engine and a non-driven wheel, the driven wheel being liable to slipping in excess of that required for maximum traction in the event excessive torque is applied thereto by the engine, apparatus for limiting excessive slipping of the driven wheel and for limiting vehicle velocity comprising first detector means responsive to the speed of the driven wheel for producing an electrical signal as a function of driven wheel speed, second detector means responsive to the speed of the non-driven wheel for producing an electrical signal as a function of non-driven wheel speed, including means to limit the non-driven wheel speed signal to a maximum at a desired nominal maximum vehicle speed, means for comparing the wheel speed signals to determine the excess of the driven wheel speed signal over the non-driven wheel speed signal and means for reducing engine torque when the driven wheel speed signal exceeds the non-driven wheel speed signal to prevent a sustained vehicle speed above the nominal maximum speed and to prevent a sustained excessive wheel slip.
Claim 2
Dependent Claim
182 words
In a vehicle having an engine, a wheel driven by the engine and a non-driven wheel, the driven wheel being liable to slipping in excess of that required for maximum traction in the event excessive torque is applied thereto by the engine, apparatus for limiting excessive slipping of the driven wheel and for limiting vehicle velocity comprising first detector means responsive to the speed of the driven wheel for producing an electrical signal as a function of driven wheel speed, second detector means responsive to the speed of the non-driven wheel for producing an electrical signal as a function of non-driven wheel speed, including means to limit the non-driven wheel speed signal to a maximum at a desired nominal maximum vehicle speed, means for comparing the wheel speed signals to determine the excess of the driven wheel speed signal over the non-driven wheel speed signal and means for reducing engine torque when the driven wheel speed signal exceeds the non-driven wheel speed signal to prevent a sustained vehicle speed above the nominal maximum speed and to prevent a sustained excessive wheel slip.
Claim 3
Dependent Claim
187 words
In a vehicle having an engine, a wheel driven by the engine and a non-driven wheel, the driven wheel being liable to slipping in excess of that required for maximum traction in the event excessive torque is applied thereto by the engine, apparatus for limiting excessive slipping of the driven wheel and for limiting vehicle velocity comprising first detector means responsive to the speed of the driven wheel for producing an electrical signal proportional to driven wheel speed, second detector means responsive to the speed of the non-driven wheel for producing an electrical signal generally proportional to non-driven wheel speed, each electrical signal being a capacitor current, means limiting the capacitor current of the non-driven wheel signal to a maximum at a desired nominal maximum vehicle speed, means for comparing the wheel speed signals to determine the excess of the driven wheel speed signal over the non-driven wheel signal speed and means for reducing engine torque when the driven wheel speed signal exceeds the non-driven wheel speed signal to prevent a sustained vehicle speed above the nominal maximum speed and to prevent a sustained excessive wheel slip.
Claim 4
Dependent Claim
187 words
In a vehicle having an engine, a wheel driven by the engine and a non-driven wheel, the driven wheel being liable to slipping in excess of that required for maximum traction in the event excessive torque is applied thereto by the engine, apparatus for limiting excessive slipping of the driven wheel and for limiting vehicle velocity comprising first detector means responsive to the speed of the driven wheel for producing an electrical signal proportional to driven wheel speed, second detector means responsive to the speed of the non-driven wheel for producing an electrical signal generally proportional to non-driven wheel speed, each electrical signal being a capacitor current, means limiting the capacitor current of the non-driven wheel signal to a maximum at a desired nominal maximum vehicle speed, means for comparing the wheel speed signals to determine the excess of the driven wheel speed signal over the non-driven wheel signal speed and means for reducing engine torque when the driven wheel speed signal exceeds the non-driven wheel speed signal to prevent a sustained vehicle speed above the nominal maximum speed and to prevent a sustained excessive wheel slip.
Claim 5
Dependent Claim
211 words
In a vehicle having an engine, a wheel driven by the engine and a non-driven wheel, the driven wheel being liable to slipping in excess of that required for maximum traction in the event excessive torque is applied thereto by the engine, apparatus for limiting excessive slipping of the driven wheel and for limiting vehicle velocity comprising first detector means responsive to the speed of the driven wheel for producing an electrical signal proportional to driven wheel speed, second detector means responsive to the speed of the non-driven wheel for producing an electrical signal generally proportional to non-driven wheel speed, each electrical signal being a capacitor current, means limiting the capacitor current of the non-driven wheel signal to a maximum at a desired nominal maximum vehicle speed, means for comparing the wheel speed signals to determine the excess of the driven wheel speed signal over the non-driven wheel speed signal to produce an output signal, a time delay circuit for delaying the output signal and means responsive to tHe delayed output signal for reducing engine torque when the driven wheel speed signal exceeds the non-driven wheel speed signal to prevent a vehicle speed above the nominal maximum speed after the time delay period and to prevent a sustained excessive wheel slip.
Claim 6
Dependent Claim
211 words
In a vehicle having an engine, a wheel driven by the engine and a non-driven wheel, the driven wheel being liable to slipping in excess of that required for maximum traction in the event excessive torque is applied thereto by the engine, apparatus for limiting excessive slipping of the driven wheel and for limiting vehicle velocity comprising first detector means responsive to the speed of the driven wheel for producing an electrical signal proportional to driven wheel speed, second detector means responsive to the speed of the non-driven wheel for producing an electrical signal generally proportional to non-driven wheel speed, each electrical signal being a capacitor current, means limiting the capacitor current of the non-driven wheel signal to a maximum at a desired nominal maximum vehicle speed, means for comparing the wheel speed signals to determine the excess of the driven wheel speed signal over the non-driven wheel speed signal to produce an output signal, a time delay circuit for delaying the output signal and means responsive to tHe delayed output signal for reducing engine torque when the driven wheel speed signal exceeds the non-driven wheel speed signal to prevent a vehicle speed above the nominal maximum speed after the time delay period and to prevent a sustained excessive wheel slip.
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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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |