CONTROL DEVICE FOR AUTOMATIC TRANSMISSION

PURPOSE:To prevent the deceleration because of undue shift-down, by reliably detecting engine brake operation by a driver and effecting the shift-down operation only when the engine brake is necessary. CONSTITUTION:An engine speed is measured by a turbine rotating speed sensor 9, and a throttle open...

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Bibliographische Detailangaben
1. Verfasser:	AZUMA HARUMI
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 prevent the deceleration because of undue shift-down, by reliably detecting engine brake operation by a driver and effecting the shift-down operation only when the engine brake is necessary. CONSTITUTION:An engine speed is measured by a turbine rotating speed sensor 9, and a throttle opening angle is read from a throttle opening angle sensor 7. Then, a turbine rotating speed at a first speed position is obtained from a turbine rotating speed map 4a. Then, according to a difference between the engine speed and the turbine rotating speed, it is calculated whether overrun occurs or not. If the overrun occurs, a shift processing to a second speed is carried out. If the overrun does not occur, a shift processing to a first speed is carried out. Accordingly, overdrive is canceled to effect the shift-down. Thus, undue shift-down may be prevented.