Control device and control process for an infinitely variable transmission

A CVT is operated in both a continuously-variable mode and in a simulated stepped-ratio mode. In the stepped ratio mode, the highest preset transmission ratio (e.g., "first gear"), is variable and responsive to vehicle driving conditions. A control senses a low vehicle speed operating cond...

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Bibliographische Detailangaben
Hauptverfasser:	LARDY, PATRICK, PETERSMANN, JOSEPH
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING ENGINEERING ELEMENTS AND UNITS GEARING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING LIGHTING MECHANICAL ENGINEERING TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A CVT is operated in both a continuously-variable mode and in a simulated stepped-ratio mode. In the stepped ratio mode, the highest preset transmission ratio (e.g., "first gear"), is variable and responsive to vehicle driving conditions. A control senses a low vehicle speed operating condition and adapts the highest ratio to reduce the step up to the next preset ratio. The control also senses a vehicle start condition and adapts the highest ratio to the current engine torque to improve drivability.