Vehicle differential score protection
AssigneeGM Global Technology Operations LLC
InventorsHaytham A. Fayyad, Min K. Kim
Life of this patent
Estimating the term…
Abstract
A differential score protection system that regulates an engine to inhibit damage to a differential driven by the engine includes a first module that initiates a differential score protection mode and a second module that decreases an engine speed when the engine speed exceeds an engine speed limit. The engine speed limit is one of a plurality of pre-determined values based on a design slip speed limit of the differential.
Claims18
A differential score protection system that regulates an engine to inhibit damage to a differential driven by the engine, comprising:
- a first module that initiates a differential score protection mode;
- and
- a second module that decreases an engine speed when said engine speed exceeds an engine speed limit, wherein said engine speed limit is one of a plurality of pre-determined values based on a design slip speed limit of said differential.
A method of operating an engine to inhibit damage to a differential driven by the engine, comprising:
- determining an engine speed limit based on a design slip speed limit of said differential;
- initiating a differential score protection mode;
- and
- decreasing an engine speed when said engine speed exceeds said engine speed limit.
A method of operating an engine to inhibit damage to a differential driven by said engine, comprising:
- determining a plurality of engine speed limits based on respective gear ratios of a transmission that is driven by said engine and a design slip speed limit of said differential;
- initiating a differential score protection mode;
- selecting one of said plurality of engine speed limits;
- and
- decreasing an engine speed when said engine speed exceeds said selected engine speed limit.
Dependencies are inferred from the claim text.