Transfer apparatus for 4-wheel driving
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United States of America Patent
Stats
-
Jan 15, 1991
Grant Date -
N/A
app pub date -
Feb 12, 1990
filing date -
Mar 7, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rotational force which was input from a transmission is received by a main shaft and transferred to the rear wheel side. The rotational force of the main shaft is transferred to the front wheel side through a hydraulic clutch. The hydraulic clutch receives the supply of an operating hydraulic pressure from an oil pump which is driven by a DC motor. Further, an operating hydraulic pressure is supplied in parallel to the hydraulic clutch from a second oil pump which is driven by the main shaft. The DC motor is driven only in the low-speed mode, stop mode, and reverse mode. On the other hand, after the motor was turned on at a rotational speed of a predetermined rotational speed or less, if the speed does not reach a second rotational speed higher than the predetermined rotational speed, the motor is not turned off.
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