Apparatus for controlling continuously variable transmission and method thereof
AssigneeUnisia Jecs Corporation
InventorMasuo Kashiwabara
Life of this patent
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Abstract
The speed change ratio of a continuously variable transmission is controlled so that the actual speed change ratio approaches the basic speed change ratio at a predetermined rate of changing the speed by setting the basic speed change ratio based upon the opening degree of the accelerator and the vehicle speed. Here, when a change in the basic speed change ratio accompanying the accelerator operation is against the direction in which the actual speed change ratio approaches the basic speed change ratio, the speed is forcibly and temporarily changed to follow the change in the basic speed change ratio.
Claims18
An apparatus for controlling a continuously variable transmission comprising:
- basic speed change ratio setting means for setting a basic speed change ratio depending upon operation conditions inclusive of, at least, the opening degree of an accelerator;
- speed change ratio control means for controlling a speed change ratio of the continuously variable transmission in a manner that an actual speed change ratio approaches said basic speed change ratio at a predetermined rate of changing the speed;
- and
- means for changing the speed following the accelerator operation which, when said basic speed change ratio is changed accompanying a change in the opening degree of the accelerator, temporarily blocks the actual speed change ratio from changing in a direction opposite to the direction in which said basic speed change ratio changes.
A method of controlling a continuously variable transmission comprising;
- setting a basic speed change ratio depending upon the operation conditions inclusive of, at least, the opening degree of an accelerator, controlling a speed change ratio of the continuously variable transmission in a manner that an actual speed change ratio approaches said basic speed change ratio at a predetermined rate of changing the speed, and when said basic speed change ratio changes accompanying a change in the opening degree of the accelerator, temporarily blocking the actual speed change ratio from changing in a direction opposite to the direction in which said basic speed change ratio changes.
Dependencies are inferred from the claim text.