Two-wheel/four-wheel drive switching device for vehicle

Details Two-wheel/four-wheel drive switching device for vehicle Two-wheel/four-wheel drive switching device for vehicle

2005-08-30

2005-08-30

Boehler, Ann Marie (Department: 3611)

Motor vehicles

Having four wheels driven

C192S044000, C701S069000

Reexamination Certificate

active

06935452

ABSTRACT:
The two-wheel/four-wheel drive switching device including a switching unit provided in either a power transmitting mechanism interposed between an engine and front wheels or a power transmitting mechanism interposed between the engine and rear wheels for switching between the continuation and interruption of power transmission in the power transmitting mechanism, and a control unit for controlling the switching unit. The control unit detects a drive current supplied to the switching unit and performs variable duty control to maintain the drive current at a given value. As a result, the two-wheel/four-wheel drive switching device reduces the generation of noise and greatly suppresses the consumption of power.

REFERENCES:
patent: 5172787 (1992-12-01), Kobayashi
patent: 5492194 (1996-02-01), McGinn et al.
patent: 5924510 (1999-07-01), Itoh et al.
patent: 6335599 (2002-01-01), Nonaka et al.
patent: 8-216714 (1996-08-01), None

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