Method and system for determining a driveline ratio for a powertrain having an auxiliary transmission

A method for determining a driveline ratio for a powertrain having an auxiliary transmission is provided and includes identifying a transmission gear ratio, measuring a transmission output speed, and measuring an auxiliary transmission output speed. An auxiliary transmission gear ratio is identified...

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Bibliographische Detailangaben
1. Verfasser:	STEEBY JON A
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CALCULATING COMBUSTION ENGINES COMPUTING CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES CONTROLLING COMBUSTION ENGINES COUNTING ELECTRIC DIGITAL DATA PROCESSING 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 HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICS ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT 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 TRANSPORTING VEHICLES IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A method for determining a driveline ratio for a powertrain having an auxiliary transmission is provided and includes identifying a transmission gear ratio, measuring a transmission output speed, and measuring an auxiliary transmission output speed. An auxiliary transmission gear ratio is identified by comparing the transmission output speed to the auxiliary transmission output speed when the powertrain is in motion. The auxiliary transmission gear ratio is identified from a switch when the powertrain is at rest. An auxiliary transmission module has an auxiliary transmission in communication with a controller. The controller is configured to identify an auxiliary transmission gear ratio, and limit an engine torque command to limit the auxiliary transmission output torque. The engine torque command is limited if the output torque exceeds a predetermined value and if the auxiliary transmission is in a reducing gear ratio.