Method to detect marginally large air gaps on heavy vehicle wheel speed sensor installations

US8818673B1 · kind B1 · utility

Assignee

• Bendix Commercial Vehicle Systems LLC · US

Inventors

• Timothy J. Frashure · Columbia Station, US
• Thomas J. Weed · North Ridgeville, US
• Craig S. Haehn · Avon Lake, US
• Kirit A. Thakkar · Parma, US
• Julie Miller · Los Angeles, US
• Daniel P. Zula · North Ridgeville, US

Key dates

• Filing date: Mar 28, 2013
• Grant date: Aug 26, 2014
• Expiry date: Mar 28, 2033

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60W2520/28
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

When detecting unacceptably large airgaps between wheel speed sensors and their exciter rings on wheel ends of a vehicle, wheel speed sensor output is filtered and monitored to detect signal amplitudes that correspond to the airgaps. When signal peak amplitude below a predetermined threshold is detected, the airgap is too large. Wheel ends having unacceptably large air gaps are indicated to the driver or technician via blink sequences (e.g., on an electronic stability program (ESP) indicator light or other suitable indicator), wherein each wheel end is associated with a unique blink sequence.