Rough road detection system
AssigneeGM Global Technology Operations LLC
InventorsJian Lin, Yong Xu, Wenbo Wang, Michael R. Grimes
Life of this patent
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Abstract
A rough road detection system includes an engine speed module, a feature space module, a normalization module, and a rough road module. The engine speed module generates an engine speed signal based on a crank signal. The feature space module generates a feature space signal based on the engine speed signal. The normalization module generates a normalized signal. The normalized signal is based on the feature space signal and a normalization value that varies in accordance with the engine speed signal. The rough road module determines whether a rough road condition exists based on the normalized signal.
Claims24
A rough road detection system, comprising:
- an engine speed module that generates an engine speed signal based on a crank signal;
- a feature space module that generates a feature space signal based on said engine speed signal;
- a normalization module that generates a normalized signal based on said feature space signal and a normalization value that varies in accordance with said engine speed signal;
- and
- a rough road module that determines whether a rough road condition exists based on said normalized signal.
A method to detect a rough road, comprising:
- generating an engine speed signal based on a crank signal;
- generating a feature space signal based on said engine speed signal;
- generating a normalized signal based on said feature space signal and a normalization value that varies in accordance with said engine speed signal;
- and
- determining whether a rough road condition exists based on said normalized signal.
A rough road detection system, comprising:
- a feature space module that generates a feature space signal based on a vehicle speed signal;
- a normalization module that generates a normalized signal based on said feature space signal and a normalization value that varies in accordance with said vehicle speed signal;
- and
- a rough road module that determines whether a rough road condition exists based on said normalized signal.
Dependencies are inferred from the claim text.