Car with gearbox and automatic clutch

• Main Authors: SALECKER, MICHAEL., 77815 BUEHL, DE, ZIMMERMANN, MARTIN, 77880 SASBACH, DE, KOSIK, FRANZ, 73760 OSTFILDERN, DE, GRASS, THOMAS, 73660 URBACH, DE
• Format: Patent
• Language: English; German
• Published: 15.10.1998
• Edition: 6
• Subjects: BLASTING; BRAKES; CLUTCHES; CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; COUPLINGS FOR TRANSMITTING ROTATION; 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; PERFORMING OPERATIONS; 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

A car has a gearbox and a device to control an automatic clutch in the drive train. It has an operating unit controlled by the control unit for adjusting the torque transmitted by the clutch. The control unit is connected to sensors and other electronic units through wires and/or a databus. The control unit calculates or determines the clutch slip in the region of the clutch friction linings and by means of the slip and the torque transmitted by the clutch, determines the energy input to the friction linings and/or their increase in temperature and/or their increased wear. With an increased energy input, temperature rise or increased wear in comparison to a threshold, the control unit controls the clutch torque transmitted independently of the energy input for a first time period and then for a second time period, controls it in time-varying fashion, eg pulsating. Then in a third time period, it increases the torque until the engine speed reaches a threshold, or until the period has elapsed.