Shift control system for vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsJonggap KIM, Kazumi HOSHIYA, Atsuhiko YOKOTA, Satoshi YAMANAKA
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Abstract
A shift control device for establishing a desired gear stage promptly while reducing a shock, during propulsion while disengaging all of engagement devices of a transmission. The shift control system compares a target stage set based on an operating data to an interim stage set based on the operating data immediately before the target stage is set. If the target stage is lower than the initial stage the engagement devices are engaged to establish the target stage without establishing the initial stage.
Claims9
A shift control system for a vehicle having an automatic transmission in which a gear stage is selected from a plurality of stages by manipulating a plurality of engagement devices, and which is connected to an output side of a prime mover, comprising:
- a controller that controls engagement and disengagement of the engagement devices,
- wherein the controller is configured to
- compute a target stage based on an operating data including a vehicle speed,
- determine whether the target stage computed during propulsion while disengaging all of the engagement devices is lower than an initial stage computed based on the operating data immediately before the target stage is computed, and
- engage the engagement devices to establish the target stage without establishing the initial stage, when the target stage is lower than the initial stage.
Dependencies are inferred from the claim text.