Control method and control device of continuously variable transmission
AssigneeNissan Motor Co., Ltd.
InventorsRyohey Toyota, Tomoyuki Nakano, Hiromu Terai, Akira Takano, Kouhei Toyohara
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Abstract
A control method of a continuously variable transmission includes supplying oil pressure to a line-pressure oil passage and a secondary pulley oil chamber by a source pressure oil pump, controlling a flow of oil into and from a primary pulley oil chamber by an electric oil pump arranged in an oil passage between the primary pulley oil chamber and the secondary pulley oil chamber, and limiting a discharge flowrate of the electric oil pump to an amount smaller than a discharge flowrate of the source pressure oil pump.
Claims7
A control method of a continuously variable transmission, comprising:
- supplying oil pressure to a line-pressure oil passage and a secondary pulley oil chamber by a source pressure oil pump;
- and
- controlling a flow of oil into and from a primary pulley oil chamber by an electric oil pump arranged in an oil passage between the primary pulley oil chamber and the secondary pulley oil chamber;
- and
- limiting a discharge flowrate of the electric oil pump to an amount smaller than a discharge flowrate of the source pressure oil pump.
A control device of a continuously variable transmission, comprising:
- a source pressure oil pump adapted to supply a hydraulic pressure to a line-pressure oil passage and a secondary pulley oil chamber;
- a shift oil passage connected to the line-pressure oil passage and adapted to cause a primary pulley oil chamber and the secondary pulley oil chamber to communicate with each other;
- an electric oil pump interposed in the shift oil passage;
- and
- a controller adapted to control a flow of oil into and from the primary pulley oil chamber by the electric oil pump,
- wherein the controller limits a discharge flowrate of the electric oil pump to an amount smaller than a discharge flowrate of the electric oil pump.
Dependencies are inferred from the claim text.