DIAGNOSTIC DEVICE FOR AUTOMATIC TRANSMISSION

Disclosed is a diagnostic device for an automatic transmission. A transmission control unit (10) comprises a selection operation time control unit (100) and a mis-coupling diagnosis control unit (101). The selection operation time control unit (100), when there is a selection operation from the D ra...

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Bibliographische Detailangaben
Hauptverfasser:	AMANO NORIHIRA, HAMANO MASAHIRO
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BLASTING CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES ENGINEERING ELEMENTS AND UNITS GEARING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT THERMAL INSULATION IN GENERAL TRANSPORTING VEHICLES IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	Disclosed is a diagnostic device for an automatic transmission. A transmission control unit (10) comprises a selection operation time control unit (100) and a mis-coupling diagnosis control unit (101). The selection operation time control unit (100), when there is a selection operation from the D range or the R range to the N range, puts all friction elements into a released state and then, when vehicle speed (VSP) falls below a prescribed level, puts one of three friction elements that are coupled when transitioning to a prescribed gear stage into a released state and puts the other two friction elements into a coupled state. The mis-coupling diagnosis control unit (101), before all of the friction elements are put into a released state, outputs a release instruction to one friction element, confirms a change in the rotational rate of a transmission input shaft after the release instruction has been output, and, if there is no change in a turbine rotational rate (Nt), reaches a diagnosis that the friction el