Motor vehicles – Having four wheels driven – With differential means for driving two wheel sets at...
Patent
1992-01-21
1994-09-13
Kashnikow, Andres
Motor vehicles
Having four wheels driven
With differential means for driving two wheel sets at...
180249, B60K 1735
Patent
active
053460332
ABSTRACT:
A power transmission apparatus for vehicle capable of obtaining a plurality of transmission characteristics by moving spools of variable throttle member 6 according to controlling current flowing to a driving coil 7 by steps, wherein a spool chamber 60 housing a first and second spools 61, 62 therein is communicated with discharge side of a vane pump 3 according to first and second communicating holes 54, 55. And by controlling current flowing to the driving coil 7 by steps, two kinds of magnetic fields, intense and weak are formed in the spool chamber 60. In the case where the first spool 61 moves to the position where it is contacted with the inside end of the spool chamber 60 by the action of the weak magnetic field, it closes an opening end of one communicating hole 54, and in the case where the second spool 62 moves to the position where it is contacted with the first spool 61, it opens an opening end of the other communicating hole 55. Three kinds of different transmission characteristics are obtained in the above mentioned cases and case of current cutoff, and the positions of the first and second spools 61, 62 do not vary in the respective cases. Thereby, positional variation caused at, spools are prevented and the respective transmission characteristics are stabilized.
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Patent abstract of Japan (Japanese Patent application laid open No. 2-106438; Laid Open Date: Apr. 18, 1990; Date of Patent Jul. 25, 1989.
Higashira Hideki
Kawai Satoshi
Okabe Ichiro
Suzou Hirakushi
Hoge Gary C.
Kashnikow Andres
Koyo Seiko Co. Ltd.
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