Overdrive system for a four-wheel drive vehicle
This patent describes an overdrive system for a four-wheel drive vehicle having an automatic transmission, the transmission having an automatic transmission device and a torque converter for transmitting power of an engine to the automatic transmission device. The latter comprises a forward clutch and a planetary gear operatively connected to the forward clutch. The automatic transmission further comprises a main transmission system for transmitting an output of the automatic transmission device to main driving wheels. The overdrive system includes an auxiliary transfer system having a transfer drive shaft for transmitting the output to auxiliary driving wheels through an auxiliary drive shaft. The automatic transmission includes an oil pump operatively connected to a crankshaft of the engine by an oil pump drive shaft. The improvement described here is of the overdrive system wherein: the auxiliary transfer system comprises: an extension of the oil pump drive shaft; a drive gear secured to the transfer drive shaft; a driven gear rotatably mounted on the extension of the oil pump drive shaft and engaged with the drive gear; a first clutch means comprising a first engaging member secured to the driven gear and a second engaging member secured to the extension for coupling the driven gear with the extension upon engagement of the engaging members; and a second clutch means comprising a third engaging member secured to the first engaging member and a fourth engaging member secured to the auxiliary drive shaft for coupling the driven gear with the auxiliary drive shaft upon engagement of the third and fourth engaging members for transmitting the output to the auxiliary driving wheels.
- Assignee:
- Fuji Jukogyo Kabushiki Kaisha, Tokyo
- Patent Number(s):
- US 4628770
- OSTI ID:
- 7140527
- Resource Relation:
- Patent File Date: Filed date 26 Jul 1984
- Country of Publication:
- United States
- Language:
- English
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