Back to results
US 2006/0075808 A1Published application
Method for determining state of engine speed sensor for vehicle
AssigneeHyundai Motor Company
InventorJi An
Life of this patent
Estimating the term…
Abstract
Disclosed is a method for determining the state of an engine speed sensor for a vehicle which can improve stability of the engine during the slow speed rotation of the engine through prompt entry into failure mode by changing a condition of the failure determination according to the state of the engine and thereby minimizing the failure determining time of the engine.
Claims3
A method for determining a state of an engine speed sensor for a vehicle, the method comprising:
- determining the engine speed sensor as being in a normal state when a signal is generated in the engine speed sensor and checking a start switch when a signal is not generated in the engine speed sensor;
- determining the engine speed sensor as being in the normal state when the start switch is off and judging whether a signal of a camshaft position sensor indicates more than two revolutions when the start switch is in the start state;
- determining the engine speed sensor as being in a normal state when the signal of the camshaft position sensor indicates more than two revolutions and determining the engine speed sensor as being in a state of failure when the signal of the camshaft position sensor indicates less than two revolutions;
- determining the engine speed sensor as being be in a normal state when the start switch is on and the signal of the camshaft position sensor indicates less than one revolution, and determining the engine speed sensor as being in a state of temporary failure and switching into a failure mode when the start switch is on and the signal of the camshaft position sensor indicates more than two revolutions;
- and
- determining the engine speed sensor as being in a normal state when the signal from the camshaft position sensor is stopped and determining the engine speed sensor as being in a state of permanent failure when the signal is continuously generated in the camshaft position sensor.
3 more elements
Dependencies are inferred from the claim text.