Electrically operated vehicle drive controller, electrically operated vehicle drive control method and its program

• US 7,010,400 B2
• Filed: 03/10/2005
• Issued: 03/07/2006
• Est. Priority Date: 03/12/2004
• Status: Active Grant

• Current Assignee: Aisin AW Company Limited (Aisin Corp.)
• Original Assignee: Aisin AW Company Limited (Aisin Corp.)
• Inventors: Hisada, Hideki, Aoki, Kazuo, Hasegawa, Kazuma, Nomura, Masaki, Izawa, Kazuyuki
• Primary Examiner(s): Camby, Richard M.
• Application Number:
  US11/076,015
• Publication Number:
  US 20050203680A1
• Time in Patent Office: 362 Days
• Field of Search: 701/1, 701/22, 701/84, 701/87, 290/40.C, 290/40.A, 290/40.B, 477/2, 477/3, 477/5, 180 651- 658
• US Class Current: 701/22
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 2510/081 Speed
• CPC Class Codes: B60W 2710/083 Torque
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility

Abstract

An apparatus and a method to stably run an electrically operated vehicle is disclosed. The invention has an electric generator target torque calculation processor, a first determination processor for calculating an inertia correction determining value, a second determination processor for calculating an integral term correction determining value, a determining mode switching condition judgment processor, and a drive motor target torque calculation processor. When a determining mode switching condition exists, the drive motor target torque calculation processor switches between a first determining mode for calculating drive motor target torque, and a second determining mode for calculating the drive motor target torque. When the determining mode switching condition exists, the first determining mode and the second determining mode are switched so that the drive motor target torque is calculated on the basis of the integral term correction determining value.

Claims

1. An electrically operated vehicle drive controller comprising:

electric generator target torque calculation processing means for calculating electric generator target torque that is a target value of electric generator torque by feedback control for performing at least integral control;

first determination processing means for calculating an inertia correction determining value based on said electric generator target torque and inertia of an electric generator;

second determination processing means for calculating an integral term correction determining value based on an integral term component of the electric generator target torque using said integral control;

determining mode switching condition judgment processing means for judging whether a predetermined determining mode switching condition exists; and

drive motor target torque calculation processing means for switching a first determining mode for calculating drive motor target torque that is a target value of drive motor torque based on the inertia correction determining value, and a second determining mode for calculating the drive motor target torque based on the integral term correction determining value when said determining mode switching condition exists.

2. The electrically operated vehicle drive controller according to claim 1, wherein said drive motor target torque calculation processing means comprises smoothing processing means for performing smoothing processing based on said inertia correction determining value and the integral term correction determining value.

3. The electrically operated vehicle drive controller according to claim 1, wherein said smoothing processing means changes the inertia correction determining value and the integral term correction determining value by a predetermined unit time switching amount.

4. The electrically operated vehicle drive controller according to claim 1, wherein said determining mode switching condition judgment processing means judges whether said determining mode switching condition exists by judging whether the electric generator lies in a transient state.

5. The electrically operated vehicle drive controller according to claim 1, wherein said drive motor target torque calculation processing means calculates the drive motor target torque based on said inertia correction determining value when the electric generator lies in a transient state, and also calculates the drive motor target torque based on said integral term correction determining value when the electric generator does not lie in the transient state.

6. The electrically operated vehicle drive controller according to claim 1, wherein said electric generator target torque is calculated by adding at least a proportional term component proportional to a speed deviation, and an integral term component proportional to an integral value of said speed deviation.

7. The electrically operated vehicle drive controller according to claim 1, wherein said first determination processing means calculates the inertia correction determining value by subtracting inertia torque obtained by the inertia of the electric generator from the electric generator target torque.

8. The electrically operated vehicle drive controller according to claim 1 further comprising a differential rotating device in which a first differential element, a second differential element, and a third differential element are arranged and the first differential element is mechanically connected to the electric generator and the second differential element is mechanically connected to the drive motor and the third differential element is mechanically connected to an engine;

and said drive motor target torque is calculated based on an output required by a driver and the electric generator target torque.

9. An electrically operated vehicle drive control method comprising:

calculating electric generator target torque that is a target value of electric generator torque by feedback control for performing at least integral control;

calculating an inertia correction determining value based on the electric generator target torque and inertia of the electric generator;

calculating an integral term correction determining value based on an integral term component of the electric generator target torque using said integral control;

judging whether a predetermined determining mode switching condition exists; and

switching between a first determining mode for calculating drive motor target torque that is a target value of drive motor torque based on the inertia correction determining value, and a second determining mode for calculating the drive motor target torque based on the integral term correction determining value when said determining mode switching condition exists.

10. A computer-readable recording medium for recording a program for enabling a computer to provide a service of an electrically operated vehicle drive control, the service comprising:

calculating electric generator target torque that is a target value of electric generator torque by feedback control for performing at least integral control;

calculating an inertia correction determining value based on said electric generator target torque and inertia of the electric generator;

calculating an integral term correction determining value based on an integral term component of the electric generator target torque using said integral control;

judging whether a predetermined determining mode switching condition exists; and

switching between a first determining mode for calculating drive motor target torque that is a target value of drive motor torque based on the inertia correction determining value, and a second determining mode for calculating the drive motor target torque based on the integral term correction determining value when said determining mode switching condition exists.