Method and apparatus for controlling a hybrid powertrain system

• US 8,631,891 B2
• Filed: 07/13/2012
• Issued: 01/21/2014
• Est. Priority Date: 11/07/2007
• Status: Expired due to Fees

• Current Assignee: Anthony H. Heap, Bayerische Motoren Werke AG, GM Global Technology Operations LLC (General Motors Company), Marek L. Wilmanowicz, Mark J. Potter, Matthew Leonard Kaufer, Daimler AG (Mercedes-Benz Group AG), Michael J. Bolton, Chrysler Group LLC (Stellantis NV), William R. Cawthorne
• Original Assignee: Bayerische Motoren Werke AG, GM Global Technology Operations LLC (General Motors Company), Daimler AG (Mercedes-Benz Group AG), Chrysler Group LLC (Stellantis NV)
• Inventors: Wilmanowicz, Marek L., Kaufer, Matthew Leonard, Potter, Mark J., Heap, Anthony H., Cawthorne, William R., Bolton, Michael J.
• Primary Examiner(s): Walters, John
• Assistant Examiner(s): TRIGGS, JAMES J
• Application Number:
  US13/548,274
• Publication Number:
  US 20120283921A1
• Time in Patent Office: 557 Days
• Field of Search: 701/11, 701/29, 701/30, 701/54, 180/65.1, 180/65.265, 180/65.27, 180/65.285, 180/65.31, 477/3, 477/5
• US Class Current: 180/69.3
• 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: B60K 6/547 the transmission being a stepped gearing
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2240/445 Temperature
• CPC Class Codes: B60L 2240/486 Operating parameters
• 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 20/15 Control strategies specially adapted for achieving a particular effect
• CPC Class Codes: B60W 2050/0006 Digital architecture hierarchy
• CPC Class Codes: B60W 2510/0619 Air-fuel ratio
• CPC Class Codes: B60W 2510/0628 Inlet air flow rate
• CPC Class Codes: B60W 2510/0671 Engine manifold pressure
• CPC Class Codes: B60W 2510/0676 Engine temperature
• CPC Class Codes: B60W 2510/083 Torque
• CPC Class Codes: B60W 2510/105 Output torque
• CPC Class Codes: B60W 2510/244 Charge state
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2540/12 : Brake pedal position
• CPC Class Codes: B60W 2540/16 : Ratio selector position
• CPC Class Codes: B60W 2540/215 : Selection or confirmation of options
• CPC Class Codes: B60W 2555/20 : Ambient conditions, e.g. wind or rain
• CPC Class Codes: B60W 2710/0605 : Throttle position
• CPC Class Codes: B60W 2710/0622 : Air-fuel ratio
• CPC Class Codes: B60W 2710/0644 : Engine speed
• CPC Class Codes: B60W 2710/065 : Idle condition
• CPC Class Codes: B60W 2710/0661 : Speed change rate
• CPC Class Codes: B60W 2710/083 : Torque
• CPC Class Codes: B60W 2710/1011 : Input shaft speed, e.g. turbine speed
• CPC Class Codes: B60W 2710/1016 : Input speed change rate
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y02T 10/64 : Electric machine technologies in electromobility

Abstract

A vehicular powertrain system includes an engine, an electro-mechanical transmission and an electric machine arranged in an input-split hybrid configuration. A control system for the powertrain system includes a control module signally connected to a plurality of input devices and configured to execute program code stored on a computer readable medium to control the powertrain. The program code monitors operator inputs, determines an intent to service the vehicle based upon the operator inputs, commands the electric machine to generate a net torque output of zero, and controls the engine speed correlative to an operator depression of an accelerator pedal.

Claims

1. Control system for a vehicular powertrain system including an engine and an electro-mechanical transmission and an electric machine arranged in an input-split hybrid configuration and selectively operatively controllable to transmit torque therebetween and to a driveline, the control system comprising:

a control module signally connected to a plurality of input devices and configured to execute program code stored on a computer readable medium to control the powertrain, the program code comprising;

code to monitor operator inputs;

code to determine an intent to service the vehicle based upon the operator inputs;

code to command the electric machine to generate a net torque output of zero; and

code to control the engine speed correlative to an operator depression of an accelerator pedal;

wherein the operator inputs comprise a hood switch and a transmission gear selector, wherein intent to service is determined by the hood switch indicating a open vehicle hood and the transmission gear selector indicating one of a PARK position and a NEUTRAL position; and

wherein the operator inputs further comprise an accelerator pedal, further comprising code to control the engine speed ranging substantially linearly from an idle speed correlated to the accelerator pedal indicating 0% depression to a maximum engine speed correlated to the accelerator pedal indicating 100% depression.

2. The control system of claim 1, wherein the code to control the engine speed comprises code to control intake air flow based upon the accelerator pedal position.

3. The control system of claim 2, wherein the operator inputs further comprise a brake pedal, further comprising code to decouple the electric machine from the driveline and to control the electric machine to induce a torque load on the engine based upon brake pedal depression.