Method for controlling continuously variable transmission and continuously variable transmission system
AssigneeNissan Motor Co., Ltd.
InventorHiromu Terai
Life of this patent
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Abstract
A method for controlling a continuously variable transmission is a control method of controlling in/out of oil to/from a primary oil chamber by using an oil pump provided in an oil passage between the primary oil chamber and a secondary oil chamber. The method includes: an abnormality determination step of determining whether rotation of the oil pump is abnormal; and when it is determined that the rotation is abnormal in the abnormality determination step, a hydraulic control step of making a secondary oil pressure higher than a pressure before the determination of abnormality.
Claims7
A method for controlling a continuously variable transmission, the method controlling in/out of oil to/from a primary oil chamber by using an oil pump provided in an oil passage between the primary oil chamber and a secondary oil chamber, the method comprising:
- an abnormality determination step of determining whether rotation of the oil pump is abnormal;
- and
- when it is determined that the rotation is abnormal in the abnormality determination step, a hydraulic control step of making a secondary oil pressure higher than a pressure before the determination of abnormality.
A continuously variable transmission system comprising:
- a primary oil chamber;
- a secondary oil chamber;
- a secondary oil pressure adjusting unit configured to supply oil to the secondary oil chamber to control a secondary oil pressure;
- an oil pump provided in an oil passage between the primary oil chamber and the secondary oil chamber to control oil in/out to/from the primary oil chamber;
- and
- a controller configured to control the secondary oil pressure adjusting unit and the oil pump,
- the controller comprising:
- an abnormality determining unit that determines whether rotation of the oil pump is abnormal;
- and
- when it is determined that the rotation is abnormal by the abnormality determining unit, a secondary hydraulic control unit that controls the secondary oil pressure adjusting unit so that the secondary oil pressure is higher than a pressure before the determination of abnormality.
Dependencies are inferred from the claim text.