Lubricating system for automatic transmission
AssigneeNissan Motor Co., Ltd.
InventorsHirofumi Michioka, Yuji Hayashi, Koichi Hayasaki
Life of this patent
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Abstract
A lubricating system which is for an automatic transmission having planetary gear sets and producing various speeds by selectively engaging friction elements. The lubricating system is provided with a first lubricating circuit which usually supplies lubricant to planetary gear sets, bearings and the like, and a second lubricating circuit which supplies lubricant to friction elements during a shift.
Claims10
A lubricating system for an automatic transmission, said automatic transmission having a first element which needs to be usually lubricated and a second element which needs to be lubricated during a shift, said lubricating system comprising:
- a first lubricating circuit usually supplying lubricant to the first transmission element;
- and
- a second lubricating circuit supplying lubricant to the second transmission element during the shift.
A lubricating system for an automatic transmission, the automatic transmission having a plurality of planetary gear sets and producing various speeds by selectively engaging friction elements, said lubricating system comprising:
- an oil pump pressurizing oil;
- a control valve assembly connected to said oil pump and including lubricant amount control means;
- a first lubricating circuit connected to said control valve assembly and supplying oil to the planetary gear sets during operation of the automatic transmission;
- and
- a second lubricating circuit connected to said control valve assembly and supplying oil to the friction elements during a shift.
A lubricating system for a friction element in an automatic transmission, said lubricating system comprising:
- an oil pump pressurizing oil;
- a control valve assembly connected to said oil pump;
- and
- a lubricating circuit connected to said control valve assembly and including a chamber defined by a casing of the automatic transmission and a member for fixing the friction element to the casing, said lubricating circuit supplying oil through the chamber to the friction element.
Dependencies are inferred from the claim text.