Auxiliary pump diagnostic systems and methods

A system includes an auxiliary pump that provides pressurized fluid to a transmission during an engine auto stop/start event. A mechanical pump provides pressurized fluid to a transmission during engine operation after the engine auto stop/start event. An auxiliary pump diagnostic system includes a...

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Bibliographische Detailangaben
Hauptverfasser:	POLOM MICHAEL E, RADEMACHER ROGER JOSEPH, PORTO BRIAN M, TARNOWSKY STEVEN A, ALDRICH, III WILLIAM L, CRITES DONALD D, VAN MAANEN KEITH D, CHERNYAK MICHAEL
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING HEATING LIGHTING MEASURING MECHANICAL ENGINEERING PHYSICS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS TESTING TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR WEAPONS
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Beschreibung
Zusammenfassung:	A system includes an auxiliary pump that provides pressurized fluid to a transmission during an engine auto stop/start event. A mechanical pump provides pressurized fluid to a transmission during engine operation after the engine auto stop/start event. An auxiliary pump diagnostic system includes a slip determination module that determines slip of a torque converter based on an engine speed and a transmission input speed. A fault determination module diagnoses a fault in the auxiliary pump in response to an engine auto start and based on the slip of the torque converter.