Drive train slip for vibration mitigation during skip fire operation

US9267454B2 · kind B2 · utility

Assignee

• Tula eTechnology, Inc. · US

Inventors

• Mark A. Wilcutts · Berkeley, US
• Xin Yuan · Palo Alto, US
• Joshua P. Switkes · Menlo Park, US
• Steven E. Carlson · Oakland, US
• John F. IMPEDUGLIA · Simpsonville, US
• John W. PARSELS · San Jose, US

Key dates

• Filing date: Aug 9, 2013
• Grant date: Feb 23, 2016
• Expiry date: May 2, 2034

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2250/18
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A variety of methods and devices for mitigating power train vibration during skip fire operation of an engine are described. In one aspect, the slip of a drive train component (such as a torque converter clutch) is based at least in part upon a skip fire characteristic (such as firing fraction, selected firing sequence/pattern, etc.) during skip fire operation of an engine. The modulation of the drive train component slip can also be varied as a function of one or more engine operating parameters such as engine speed and/or a parameter indicative of the output of fired cylinders (such as mass air charge).