CONTROL DEVICE FOR HYBRID VEHICLE

PROBLEM TO BE SOLVED: To securely protect an electric motor and an inverter from temperature rise caused by down speed change of a transmission in a hybrid vehicle in which the engine and the electric motor are constantly connected. SOLUTION: Rotation frequency of the electric motor at the time of d...

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Bibliographische Detailangaben
1. Verfasser:	MURAI HIROAKI
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES AUXILIARY DRIVES FOR VEHICLES BLASTING CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL ENGINEERING ELEMENTS AND UNITS GEARING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INSTRUMENTATION OR DASHBOARDS FOR VEHICLES LIGHTING MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES 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:	PROBLEM TO BE SOLVED: To securely protect an electric motor and an inverter from temperature rise caused by down speed change of a transmission in a hybrid vehicle in which the engine and the electric motor are constantly connected. SOLUTION: Rotation frequency of the electric motor at the time of down speed change is calculated, and a current command value is determined based on this and a torque command value at the time of down speed change. Allowance time up to a protective temperature is calculated based on the current command value and the current motor temperature. When this allowance time is less than a prescribed time, down speed change is prohibited, and when it is longer than the prescribed time, down speed change is permitted. When the motor temperature is likely to reach the protective temperature down speed change is prohibited, where rotation of the electric motor is not increased, thereby deterioration of durability of the electric motor and the inverter is prevented. COPYRIGHT: (C)2004,JPO