Method and apparatus for determining optimum skip fire firing profile

US10941722B2 · kind B2 · utility

Assignees

• Tula eTechnology, Inc. · US
• GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

• Mark A. Shost · Northville, US
• Louis J. Serrano · Los Gatos, US
• Steven E. Carlson · Oakland, US
• Vijay Srinivasan · Durham, US
• Eric J. Defenderfer · Brighton, US
• Nitish J. Wagh · Northville, US
• Randall S. Beikmann · Brighton, US
• Jinbiao Li · Rochester Hills, US
• Xin Yuan · Palo Alto, US
• Li-Chun CHIEN · Milpitas, US

Key dates

• Filing date: Feb 7, 2019
• Grant date: Mar 9, 2021
• Expiry date: May 1, 2039

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2200/101
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

In one aspect, a skip fire engine controller is described. The skip fire engine controller includes a skip fire module arranged to determine an operational firing fraction and associated cylinder load for delivering a desired engine output. The skip fire engine controller also includes a firing controller arranged to direct firings in a skip fire manner that delivers the selected operational firing fraction. Various methods, modules, lookup tables and arrangements related to the selection of a suitable operational firing fraction are also described.