Method and system for adaptively controlling a hybrid vehicle

• US 7,640,084 B2
• Filed: 03/09/2006
• Issued: 12/29/2009
• Est. Priority Date: 03/09/2006
• Status: Active Grant

• Current Assignee: Deere & Company
• Original Assignee: Deere & Company
• Inventors: Musser, James William
• Primary Examiner(s): Keith; Jack W.
• Assistant Examiner(s): Nguyen; Chuong P
• Application Number:
  US11/371,598
• Publication Number:
  US 20070213891A1
• Time in Patent Office: 1,391 Days
• Field of Search: 701/1, 701/22, 701/35, 701/36, 180 651- 653, 180/290, 903/903, 903940-946, 477/3, 477/7, 477/107, 318/53, 318/700, 318/712, 318/717, 318/798, 318/811
• US Class Current: 701/22
• CPC Class Codes: B60K 6/46 Series type
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2240/443 Torque
• CPC Class Codes: B60L 2260/167 of motors or generators
• CPC Class Codes: B60L 3/12 Recording operating variables ; Monitoring of operating variables
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: B60W 20/11 using model predictive control [MPC] strategies, i.e. control methods based on models predicting performance utilising navigation and traffic information in the control strategy B60W20/12
• CPC Class Codes: B60W 2556/10 Historical data
• CPC Class Codes: B60W 30/188 Controlling power parameters of the driveline, e.g. determining the required power
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y10S 903/903 having energy storing means, e.g. battery, capacitor
• CPC Class Codes: Y10S 903/944 Characterized by control of fuel cell
• CPC Class Codes: Y10S 903/945 Characterized by control of gearing, e.g. control of transmission ratio
• CPC Class Codes: Y10S 903/946 Characterized by control of driveline clutch

Abstract

A method and system for adaptively controlling a hybrid vehicle comprises a recorder for recording a historical load or duty cycle of vehicle during or after operation of the vehicle. A classifier classifies the historical load in accordance with a load category. A controller assigns at least one of a current control curve and a slew rate control curve associated with the load category for a defined time period after the recording of the historical load or if the vehicle is presently operating generally consistent with the load category. At least one of the current control curve and the slew rate control curve, or data representative thereof, are used to control an operation of an electric drive motor of the vehicle for the defined time period.

Claims

1. A method for controlling a hybrid vehicle, the method comprising:

recording a historical load of a vehicle for a defined time period during or after operation of the vehicle;

classifying the historical load for the defined time period in accordance with load category, including a first load category and a second load category wherein the classifying comprises classifying the historical load in accordance with a usage factor comprising a specific task;

determining a present load associated with an electric drive;

assigning a first slew rate control curve if the present load is consistent with the first load category and assigning a second slew rate control curve if the current load is consistent with the second load category for a duration after the defined time period based on the determined present load being consistent with the classified load category.

2. The method according to claim 1 wherein at least one of the load categories reflects a low duty with marked acceleration and cruising.

3. The method according to claim 1 wherein the determining comprises determining a present load category of the present load based upon a user input of a specific task.

4. The method according to claim 1 wherein the first slew rate control curve and the second slew rate control curve are expressed in terms of generator slew rate versus state of charge of an energy storage device of the vehicle.

5. The method according to claim 1 wherein the recording a historical load comprises recording a traction load associated with a traction load detector.

6. The method according to claim 1 wherein the assigning assigns the first slew rate control curve based on a first look-up table entry associated with the first load category and assigns the second slew rate control curve based on second look-up table entry associated with the second load category.

7. The method according to claim 1 wherein the first slew rate control curve is associated with a low duty load category, the first control curve comprising generally lower maximum generator currents than a reference control curve associated with a general purpose load category;

the first control curve comprising an intermediate curve region of generally constant current over a wider state of charge range than that of the reference control curve.