Control apparatus and control method for transmission
AssigneeToyota Jidosha Kabushiki Kaisha
InventorMasaaki Otsubo
Life of this patent
Estimating the term…
Abstract
When there is a shift command for the transmission (3) during or immediately after clutch touch point learning, a shift operation value for the transmission (3) is reduced compared to what it normally is (steps ST11 and ST12). Reducing the shift operation value in this way enables the change in the rotation speed of an input rotating body at the time of a gear shift operation to be gradual if that gear shift operation is during or immediately after clutch touch point learning. As a result, inertia torque, and thus shift shock, can be suppressed.
Claims16
A control apparatus for a transmission that includes a shift operation executing unit that performs a shift operation in the transmission of a vehicle, a clutch operating unit that selectively engages and disengages a clutch that is arranged between a driving power source of the vehicle and the transmission, and a learning unit that learns a clutch touch point of the clutch, comprising:
- a determining unit that determines whether clutch touch point learning has just been performed by the learning unit;
- and
- a shift operation value reducing unit that reduces a shift operation value in the transmission when there is a shift command for the transmission, when an output side of the clutch is rotating immediately after the clutch touch point learning,
- wherein the shift operation value is at least one of i) a shifting speed, ii) a load applied at the time of the shift operation, and iii) pressure applied at the time of the shift operation.
A control method for a transmission that includes a shift operation executing unit that performs a shift operation in the transmission of a vehicle, a clutch operating unit that selectively engages and disengages a clutch that is arranged between a driving power source of the vehicle and the transmission, and a learning unit that learns a clutch touch point of the clutch, comprising:
- determining whether clutch touch point learning has just been performed by the learning unit;
- and
- reducing a shift operation value in the transmission when there is a shift command for the transmission immediately after the clutch touch point learning.
A control apparatus for a transmission that includes a shift operation executing unit that performs a shift operation in the transmission of a vehicle, a clutch operating
- unit that selectively engages and disengages a clutch that is arranged between a driving power source of the vehicle and the transmission, and a learning unit that learns a clutch touch point of the clutch, comprising:
- a determining unit that determines whether clutch touch point learning is being, or has just been, performed by the learning unit;
- a shift operation value reducing unit that reduces a shift operation value in the transmission when there is a shift command for the transmission during or immediately after the clutch touch point learning;
- an accelerator operation determining unit that determines whether an accelerator operation is being performed;
- and
- a brake operation determining unit that determines whether a brake operation is being performed, wherein:
- the shift operation value is at least one of i) a shifting speed, ii) a load applied at the time of the shift operation, and iii) pressure applied at the time of the shift operation;
- and
- the shift operation value reducing unit reduces the shift operation value more when at least one of two conditions is satisfied during or immediately after the clutch touch point learning, the two conditions being i) that an accelerator be off, and ii) that a brake be on.
Dependencies are inferred from the claim text.