Machine element or mechanism – Control lever and linkage systems – Multiple controlled elements
Patent
1998-09-28
2000-06-20
Herrmann, Allan D.
Machine element or mechanism
Control lever and linkage systems
Multiple controlled elements
74665GA, 180233, 180247, 192 85V, 192 8713, B60K 17354, F16D 2504, F16H 3706
Patent
active
060764201
ABSTRACT:
A power transmission changeover device for an automatic-transmission, four-wheel drive vehicle which can prevent rattling of gears while the gear position of the sub-transmission is being changed over. Air pipes extending from a negative pressure source for actuating an actuator for changing over gears of a sub-transmission, and electromagnetic valves have inner diameters of 4 mm or over. An accumulator is provided between the electromagnetic valves in the air pipes and the negative pressure source. This makes it possible to increase the operating speed and operating force of the actuator and, to shorten the duration of the neutral position when gears are changed over, and to increase the meshing force with new gears. It is thus possible to prevent rattling of gears due to improper meshing of gears.
REFERENCES:
patent: 2537400 (1951-01-01), Drong
patent: 4407387 (1983-10-01), Lindbert
patent: 4733574 (1988-03-01), Uchiyama
patent: 4747463 (1988-05-01), Yoshinaka et al.
patent: 4858716 (1989-08-01), Kano et al.
patent: 5740697 (1998-04-01), Yamase
Akiyoshi Koji
Hori Isao
Ito Kenichiro
Herrmann Allan D.
NTN Corporation
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