Control system for transfer case range shift

Details Control system for transfer case range shift Control system for transfer case range shift

2005-04-05

2005-04-05

Ho, Ha (Department: 3681)

Planetary gear transmission systems or components

Electric or magnetic drive or control

With condition responsive control

C074S336001, C074S339000

Reexamination Certificate

active

06875146

ABSTRACT:
A method for operating a transfer case synchronized range shift mechanism. The range shift mechanism can be selectively actuated for establishing a four-wheel high-range drive mode, a neutral mode, and a four-wheel low-range drive mode. The synchronized range shift mechanism is comprised of a first input gear system, a second input gear system, and an output gear system. The output gear system is comprised of a rotary output member that may be selectively engaged with either the first input gear system or the second input gear system, depending on which four-wheel-drive operating mode the vehicle operator selects. The range shift mechanism is further comprised of a synchronizing mechanism. The method for controlling the speed of the range shift as a means for reducing the time it takes to perform the range shift.

REFERENCES:
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patent: 6481304 (2002-11-01), Yoshioka et al.
patent: 6578442 (2003-06-01), Aoyama et al.
patent: 20020157491 (2002-10-01), Fukuda

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