METHOD AND APPARATUS FOR MULTIVARIATE ACTIVE DRIVELINE DAMPING

• US 20110178686A1
• Filed: 03/30/2011
• Published: 07/21/2011
• Est. Priority Date: 03/22/2006
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Morris, Robert L.
• Granted Patent: US 8,195,352 B2
• Time in Patent Office: Days
• US Class Current: 701/51
• CPC Class Codes: B60K 1/02 comprising more than one electric motor
• CPC Class Codes: B60K 6/365 with the gears having orbital motion
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• 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 10/11 Stepped gearings
• 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 20/15 Control strategies specially adapted for achieving a particular effect
• CPC Class Codes: B60W 20/20 Control strategies involving selection of hybrid configuration, e.g. selection between series or parallel configuration
• CPC Class Codes: B60W 2555/20 Ambient conditions, e.g. wind or rain
• CPC Class Codes: B60W 2710/0666 Engine torque
• CPC Class Codes: B60W 2710/083 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 30/20 Reducing vibrations in the driveline
• CPC Class Codes: F16H 2037/0866 Power split variators with distributing differentials, with the output of the CVT connected or connectable to the output shaft
• CPC Class Codes: F16H 2037/102 the input or output shaft of the transmission is connected or connectable to two or more differentials
• CPC Class Codes: F16H 2037/104 Power split variators with one end of the CVT connected or connectable to two or more differentials
• CPC Class Codes: F16H 2037/106 with switching means to provide two variator modes or ranges
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y10S 903/946 Characterized by control of driveline clutch

Abstract

A multivariate control method and system to control torque output from a powertrain system to a driveline is provided, to reduce driveline oscillations. The powertrain preferably comprises hybrid powertrain having a plurality of torque-generative devices connected to a transmission. Desired powertrain and driveline operating states are determined, as are a plurality of operating state errors. Each torque-generative device is controlled, based upon the operating state errors, and operating mode of the transmission. A damping torque command, additive to a commanded torque, is determined for one or more of the torque-generative devices based upon the determined transmission operating mode. Determined operating states include operator input, and powertrain/driveline including driveline torque; transmission input torque, rotational speed of the torque-generative devices; road load; and, accessory load.

Claims

1. Method for damping oscillations in a driveline, comprising controlling a torque output from a powertrain system comprising a plurality of individually-controllable torque generative devices operably connected to a two-mode, compound-split, electro-mechanical hybrid transmission, the transmission having a plurality of operating modes;

comprising;

constructing a matrix of desired operating states for the powertrain system and the driveline;

constructing a matrix of operating state errors; and

,

controlling each torque generative device based upon the matrix of operating state errors and the transmission operating mode.

2. Powertrain system, comprising:

a plurality of torque-generative devices, each operable to generate torque deliverable to a transmission, said transmission operable to deliver motive torque to a driveline; and

,

a control system, operable to control the integrated torque-generative devices, and, the transmission, said control system including a storage medium having a computer program encoded therein for effecting a multivariate control method to control motive torque output from the transmission to the driveline, the program comprising;

code for constructing a matrix of desired operating states for the powertrain system and the driveline;

code for constructing a matrix of operating state errors; and

,

code for controlling each torque-generative device based upon the matrix of operating state errors.

3. The powertrain system of claim 2, wherein the torque-generative devices comprise an internal combustion engine, and, a pair of electrical motors.

4. The powertrain system of claim 2, wherein the transmission comprises to a two-mode, compound-split, electro-mechanical hybrid transmission.

5. The powertrain system of claim 2, wherein the control system operable to control the transmission further comprises the control system operable to control a transmission operating mode.

6. The powertrain system of claim 5, wherein the control system operable to control the transmission further comprises the control system operable to each torque-generative device based upon the transmission operating mode.