Stepless transmission for vehicles
AssigneeMazda Motor Corporation
InventorsKazuhiko Ueda, Seiji Esaki, Osamu Sado
Life of this patent
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Abstract
A hydraulically operated stepless transmission has a first power flow path established so as to include a torque converter and a reverse and reduction gear and a second power flow path established so as to include a stepless transmission gear. The first and second flow paths are selectively available. A hydraulic control circuit, including at least one oil pump, causes a decrease in quantity of a lubrication oil delivered to the stepless transmission gear while the first power flow path is established, and causes a decrease in quantity of a working oil delivered to the torque converter while the second power flow path is established.
Claims7
A stepless transmission having a torque converter fastened to an engine output shaft, a stepless transmission gear connected to the engine output shaft and a reverse and reduction gear operationally coupled to the torque converter for an automotive vehicle, comprising:
- first means for establishing a first power flow path, including the torque converter and the reverse and reduction gear, through which engine output is transmitted to an output shaft of the stepless transmission;
- second means for establishing a second power flow path, including the stepless transmission gear, through which engine output is transmitted to said output shaft of the stepless transmission;
- and
- oil control means, including at least one oil pump, for causing a decrease in quantity of a lubrication oil delivered to the stepless transmission gear while said first means establishes said first power flow path, and causing a decrease in quantity of a working oil delivered to the torque converter while said second means establishes said second power flow path.
Dependencies are inferred from the claim text.