Control apparatus for automatic transmission
AssigneeToyota Jidosha Kabushiki Kaisha
InventorNaoyuki Sakamoto
Life of this patent
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Abstract
An ECU executes a program including the steps of when an upshift is requested, determining whether engine torque ET changing rate ΔET>threshold value ΔET (1) is established or not: incrementing a recovery timer TE when engine torque ET changing rate ΔET<ΔET (2) is established during establishment of engine torque ET changing rate ΔET>threshold value ΔET (1); and initiating an upshift when recovery timer TE>threshold value TE (1).
Claims6
A control apparatus for an automatic transmission coupled to a motive power source, comprising:
- a sensing unit sensing an output shaft torque of said motive power source, and
- a control unit controlling said automatic transmission such that, when a changing rate of said output shaft torque satisfies a first predetermined condition, initiation of an upshift is delayed until a second predetermined condition is satisfied;
- wherein said first predetermined condition includes a condition that an increase rate of said output shaft torque is larger than a first predetermined increase rate, and
- wherein said second predetermined condition includes a condition that the increase rate of said output shaft torque is smaller than a second predetermined increase rate.
A control apparatus for an automatic transmission coupled to a motive power source, comprising:
- a sensing unit sensing an output shaft torque of said motive power source, and
- a control unit controlling said automatic transmission such that, when a changing rate of said output shaft torque satisfies a first predetermined condition, initiation of an upshift is delayed until a second predetermined condition is satisfied;
- wherein said first predetermined condition includes a condition that a reduction rate of said output shaft torque is larger than a first predetermined reduction rate, and
- wherein said second predetermined condition includes a condition that the reduction rate of said output shaft torque is smaller than a second predetermined reduction rate.
A control apparatus for an automatic transmission coupled to a driver source, comprising:
- sensing means for sensing an output shaft torque of said motive power source, and
- control means for controlling said automatic transmission such that, when a changing rate of said output shaft torque satisfies a first predetermined condition, initiation of an upshift is delayed until a second predetermined condition is satisfied;
- wherein said first predetermined condition includes a condition that an increase rate of said output shaft is larger than a first predetermined increase rate, and
- wherein said second predetermined condition includes a condition that the increase rate of said output shaft torque is smaller than a second predetermined increase rate.
A control apparatus for an automatic transmission coupled to a driver source, comprising:
- sensing means for sensing an output shaft torque of said motive power source, and
- control means for controlling said automatic transmission such that, when a changing rate of said output shaft torque satisfies a first predetermined condition, initiation of an upshift is delayed until a second predetermined condition is satisfied;
- wherein said first predetermined condition includes a condition that a reduction rate of said output shaft torque is larger than a first predetermined reduction rate, and
- wherein said second predetermined condition includes a condition that the reduction rate of said output shaft torque is smaller than a second predetermined reduction rate.
Dependencies are inferred from the claim text.