GEAR SHIFT CONTROL DEVICE OF AUTOMATIC TRANSMISSION

PURPOSE:To secure durability of a friction engagement device by altering into the fail shift pattern with the shifting point set to a relatively low point while restricting to over a certain value of engine load, when the engine torque is judged to be in a condition not possible to change as schedul...

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Bibliographische Detailangaben
Hauptverfasser:	HAMANO YUKIO, IZUMI FUMIAKI, TOMOMATSU HIDEO
Format:	Patent
Sprache:	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:	PURPOSE:To secure durability of a friction engagement device by altering into the fail shift pattern with the shifting point set to a relatively low point while restricting to over a certain value of engine load, when the engine torque is judged to be in a condition not possible to change as scheduled. CONSTITUTION:When any reason such as failure in sensor systems or request from the engine side does not allow implementation of scheduled program, even though the shift concerned is such that an alteration control of the engine torque is to be made theoretically, it is sensed quickly by a sensing means. Only when the load sensed by an engine load sensing means is over a specified value, a shift pattern altering means alters the alteration pattern into the fail alteration pattern in which the shift point is set to a relatively low value so as to serve for emergency. This enables early conduction of shifting to lead to enhancing the durability of a friction engagement device.