Apparatus for controlling the shift between two and four-wheel d

Details Apparatus for controlling the shift between two and four-wheel d Apparatus for controlling the shift between two and four-wheel d

1987-07-24

1989-05-09

Marmor, Charles A.

Motor vehicles

Having four wheels driven

With manually operated means for disengaging drive to one or...

36442401, B60K 17344, B60K 2308

Patent

active

048280704

ABSTRACT:
An improved apparatus for controlling the shift between two and four-wheel drivings comprises sensors for detecting the revolution velocities of a propeller and axle shafts, and a calculation unit for calculating a predetermined time duration during which the difference of the revolution velocities is less than a predetermined value after a shift member of the propeller shaft is shifted. A shift member of the axle shaft is shifted at a time during the predetermined time duration to be calculated by the calculation unit so that the shift is smoothly performed from two to four-wheel drivings without producing any gear sound or noise even in a high speed running.

REFERENCES:
patent: 4560025 (1985-12-01), Suzuki et al.
patent: 4592442 (1986-06-01), Wilson et al.

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