OUTPUT TORQUE CALCULATING APPARATUS AND CALCULATING METHOD

• US 20100004835A1
• Filed: 06/24/2009
• Published: 01/07/2010
• Est. Priority Date: 07/01/2008
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Oishi, Toshiya, Kuwahara, Seiji, Matsumoto, Shogo
• Granted Patent: US 8,185,283 B2
• Time in Patent Office: Days
• US Class Current: 701/59
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/115 with planetary gears
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2710/0666 Engine torque
• CPC Class Codes: B60W 30/1882 characterised by the working point of the engine, e.g. by using engine output chart
• CPC Class Codes: B60W 50/0097 Predicting future conditions

Abstract

First target torque of an engine is set based on a driver'"'"'s operation, a vehicle behavior, and a request for shifting gears of an automatic transmission. The engine is controlled such that the difference between the first target torque and the actual output torque of the engine is reduced. Detection torque is calculated from an operation state of the engine. In consideration of dead time in control of the engine, calculation torque is calculated from the first target torque. In addition, first lookahead torque with the dead time in the engine being removed is calculated by feedback-correcting the first target torque according to an error e between the detection torque and the calculation torque.

Claims

1. An output torque calculating apparatus comprising:

a setting unit for setting target torque of a driving source;

a detection unit for detecting an operation state of said driving source;

a first calculation unit for calculating first output torque of said driving source according to the operation state of said driving source; and

a second calculation unit for calculating, from said target torque, second output torque of said driving source in consideration of dead time in said driving source and calculating, from said target torque, third output torque of said driving source with the dead time in said driving source being removed, by correcting said target torque according to a difference between said first output torque and said second output torque.

2. The output torque calculating apparatus according to claim 1, wherein

said setting unit sets first target torque considering different kinds of torques and sets second target torque from which at least any one of said different kinds of torques is removed,

said second calculation unit calculates, from said first target torque, said second output torque of said driving source in consideration of the dead time in said driving source and calculates, from said second target torque, third output torque of said driving source with the dead time in said driving source being removed, by correcting said second target torque according to a difference between said first output torque and said second output torque.

3. The output torque calculating apparatus according to claim 1, further comprising a third calculation unit for calculating output torque that lags behind said third output torque by a predetermined time.

4. The output torque calculating apparatus according to claim 1, further comprising a learning unit for learning a correction amount corresponding to a difference between said first output torque and said second output torque for each operation state of said driving source,

wherein said second calculation unit calculates said third output torque using the learned correction amount.

5. The output torque calculating apparatus according to claim 1, wherein

said driving source is an internal combustion engine,

said detection unit detects the quantity of air taken into said internal combustion engine, and

said first calculation unit calculates the first output torque of said internal combustion engine according to the detected quantity of air.

6. An output torque calculating method comprising the steps of:

setting target torque of a driving source;

detecting an operation state of said driving source;

calculating first output torque of said driving source according to the operation state of said driving source;

calculating, from said target torque, second output torque of said driving source in consideration of dead time in said driving source and

calculating, from said target torque, third output torque of said driving source with the dead time in said driving source being removed, by correcting said target torque according to a difference between said first output torque and said second output torque.

7. The output torque calculating method according to claim 6, wherein

the step of setting said target torque includes the steps of

setting first target torque considering different kinds of torques, and

setting second target torque from which at least any one of said different kinds of torques is removed,

the step of calculating said second output torque includes the step of calculating, from said first target torque, said second output torque of said driving source in consideration of the dead time in said driving source, and

the step of calculating said third output torque includes the step of calculating, from said second target torque, said third output torque of said driving source with the dead time in said driving source being removed, by correcting said second target torque according to a difference between said first output torque and said second output torque.

8. The output torque calculating method according to claim 6, further comprising the step of calculating output torque that lags behind said third output torque by a predetermined time.

9. The output torque calculating method according to claim 6, further comprising the step of learning a correction amount corresponding to a difference between said first output torque and said second output torque for each operation state of said driving source,

wherein the step of calculating said third output torque includes the step of calculating said third output torque using the learned correction amount.

10. The output torque calculating method according to claim 6, wherein

said driving source is an internal combustion engine,

the step of detecting an operation state of said driving source includes the step of detecting the quantity of air taken into said internal combustion engine, and

the step of calculating said first output torque includes the step of calculating the first output torque of said internal combustion engine according to the detected quantity of air.

11. An output torque calculating apparatus comprising:

setting means for setting target torque of a driving source;

detection means for detecting an operation state of said driving source;

first calculation means for calculating first output torque of said driving source according to the operation state of said driving source; and

second calculating means for calculating, from said target torque, second output torque of said driving source in consideration of dead time in the driving source and calculating, from said target torque, third output torque of said driving source with the dead time in said driving source being removed, by correcting said target torque according to a difference between said first output torque and said second output torque.

12. The output torque calculating apparatus according to claim 11, wherein

said setting means includes

means for setting first target torque considering different kinds of torques and

means for setting second target torque from which at least any one of said different kinds of torques is removed,

said second calculation means includes means for calculating, from said first target torque, said second output torque of said driving source in consideration of the dead time in said driving source and calculating, from said second target torque, said third output torque of said driving source with the dead time in said driving source being removed, by correcting said second target torque according to a difference between said first output torque and said second output torque.

13. The output torque calculating apparatus according to claim 11, further comprising means for calculating output torque that lags behind said third output torque by a predetermined time.

14. The output torque calculating apparatus according to claim 11, further comprising means for learning a correction amount corresponding to a difference between said first output torque and said second output torque for each operation state of said driving source,

wherein said second calculation means includes means for calculating said third output torque using the learned correction amount.

15. The output torque calculating apparatus according to claim 11, wherein

said driving source is an internal combustion engine,

said detection means includes means for detecting the quantity of air taken into said internal combustion engine, and

said first calculation means includes means for calculating the first output torque of said internal combustion engine according to the detected quantity of air.