Method and apparatus for controlling a hybrid powertrain system

US8631891B2 · kind B2 · utility

Assignees

• GM GLOBAL TECHNOLOGY OPERATIONS LLC · US
• Daimler AG · DE
• Chrysler Group LLC · US
• Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

• Marek L. Wilmanowicz · Pinckney, US
• Matthew Leonard Kaufer · Holly, US
• Mark Potter · Davisburg, US
• Anthony H. Heap · Ann Arbor, US
• William R. Cawthorne · Milford, US
• Michael Bolton · Oshkosh, US

Key dates

• Filing date: Jul 13, 2012
• Grant date: Jan 21, 2014
• Expiry date: Jul 13, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/64
• WIPO field: Transport
• WIPO sector: Mechanical engineering

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.