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US 7,610,800 B2Granted
Method and system for collecting crankshaft position data
AssigneeGM Global Technology Operations LLC
InventorsXuan Dung T. Avallone, John L. Lahti, David S. Mathews, Robert C. Simon, Jr., Leonard G. Wozniak, William R. Cawthorne, Robert S Wickman
Life of this patent
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Abstract
A method for collecting crankshaft position data includes rotating a crankshaft of an engine within a selected angular velocity range without any fuel being applied to the engine and measuring crankshaft position data.
Claims20
A method for collecting position data of an internal combustion engine crankshaft comprising:
- monitoring crankshaft velocity;
- rotating the crankshaft into a selected angular velocity range;
- maintaining the crankshaft within the selected angular velocity range without any fuel being applied to said engine;
- measuring crankshaft position data while the crankshaft is maintained within the selected angular velocity range;
- and
- determining a crankshaft error factor based on the measured crankshaft position data.
3 more elements
A crankshaft position data measurement system for an internal combustion engine comprising:
- means operative to rotate said crankshaft into a selected angular velocity range;
- means for maintaining the crankshaft within the selected angular velocity range with no fuel being applied to said engine;
- a measurement device operative to measure crankshaft position data while the crankshaft is maintained within the selected angular velocity range with no fuel being applied to said engine;
- and
- a processor determining crank error values based on the measured crankshaft position data.
2 more elements
Dependencies are inferred from the claim text.