Diagnostic apparatus and method for coolant control valve
AssigneeHyundai Motor Company
InventorYoo Jin SEO
Life of this patent
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Abstract
A diagnostic apparatus for a coolant control valve including a housing having a plurality of ports, a valve member provided to be rotatable in the housing, and a driving device rotating the valve member between two end positions, the diagnostic apparatus including at least one position sensor provided on an external surface of the housing for sensing a position of the valve member, a determination device for determining whether or not the valve member is stuck using the position of the valve member sensed by the position sensor and a controller for controlling the driving device.
Claims14
A diagnostic apparatus for a coolant control valve including a housing having a plurality of ports, a valve member provided to be rotatable in the housing, and a driving device rotating the valve member between two end positions, the diagnostic apparatus comprising:
- at least one position sensor provided on an external surface of the housing for sensing a position of the valve member;
- a determination device for determining whether or not the valve member is stuck using the position of the valve member sensed by the position sensor;
- and
- a controller for controlling the driving device.
A diagnostic method for a coolant control valve including a housing having an inflow port connected to a cooling jacket of an engine and a first outflow port connected to a radiator, a valve member provided to be rotatable in the housing, and a driving device for rotating the valve member between two end positions, the diagnostic method comprising:
- rotating the valve member to fully open the first outflow port when the engine is off;
- moving the valve member to at least one of the end positions when the engine is on to perform a determination operation that determines whether or not the valve member is stuck;
- and
- moving the valve member to a limp home position when it is determined that the valve member is stuck, to operate a limp home mode and generate a warning signal.
Dependencies are inferred from the claim text.