Securing and diagnosing the vehicle speed input and direction for torque control systems

US8041478B2 · kind B2 · utility

Assignee

• GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

• Joseph M. Stempnik · Warren, US
• Richard B. Jess · Haslett, US
• Daniel P. Grenn · Cadillac, US
• Tracey A. Bagley-Reed · Canton, US
• Ronald W. Van Diepen · Ann Arbor, US
• Mark H. Costin · West Bloomfield Township, US
• Michael A. Turley · Dexter, US
• Sandra J. Nelson · Louisville, US
• Bryan D. Lehman · Fenton, US

Key dates

• Filing date: Jan 30, 2009
• Grant date: Oct 18, 2011
• Expiry date: Mar 15, 2030

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2061/1284
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A vehicle speed module includes a speed arbitration module that receives at least two of a wheel speed, a transmission output speed (TOS), and an electric motor speed (EMS), and that determines a vehicle speed based on a comparison of the at least two of the wheel speed, the TOS, and the EMS. A speed diagnostic module selectively diagnoses a fault in one of a wheel speed sensor, a TOS sensor, and an EMS sensor based on the comparison.