Vehicle speed sensor diagnostic system and method
US8543284B2 · kind B2 · utility
3Cited by
30References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 29, 2006 |
| Grant date | Sep 24, 2013 |
| Priority date | — |
| Expiry date | Mar 24, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/1284
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A diagnostic system for a vehicle speed sensor is provided. The system includes: an upshift module that selectively initiates an upshift of a transmission based on a vehicle speed sensor (VSS) signal; a speed drop detection module that monitors at least one of engine speed and input speed for a reduction in speed due to said upshift; and a torque request module that monitors engine torque and selectively diagnoses a VSS malfunction based on said speed reduction and said engine torque.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.