Vehicle with lockable differential

Details Vehicle with lockable differential Vehicle with lockable differential

1984-11-26

1987-06-09

Love, John J.

Motor vehicles

With means for detecting wheel slip during vehicle...

74711, 180 76, B60K 2304, B60T 832

Patent

active

046713735

ABSTRACT:
A locking-type differential (5; I, II) is automatically engaged to locked position upon sensing of certain vehicle operating conditions, and unlocked upon sensing other vehicle operating conditions. If the steering wheel is deflected, or transverse acceleration is sensed, the differential is inhibited from locking; likewise, if the brakes are applied, or the engine is operating under idle condition, the locking-type differential is either unlocked or prevented from locking. On the other hand, if a kick-down signal from the accelerator is sensed, or if the difference in speed of driven and rolling wheels exceeds a predetermined amount, thus indicating slippage of the driven wheel, or if a brake applied to the driven wheel is then engaged, and the speed between the wheels coupled to the differential has become essentially uniform (FIG. 2, terminal 17), the differential is controlled to lock. Two axles may have differentials applied thereto, for example in four-wheel drive vehicles, and the criteria for the locking of the second differential may be similar or, for example, include reduction of drive torque being applied by the engine. Suitable time delays can be provided in the circuitry to prevent spurious response under transient conditions.

REFERENCES:
patent: 2722134 (1955-11-01), Cabell
patent: 2874790 (1959-02-01), Hennessey
patent: 3138970 (1964-06-01), Costa
patent: 3706351 (1972-12-01), Neisch
patent: 3771839 (1973-11-01), Fink
patent: 4432430 (1984-02-01), Lind
patent: 4467886 (1984-08-01), DeClaire
patent: 4511014 (1985-04-01), Makita
patent: 4523494 (1985-06-01), Sparks

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