A method of monitoring the state of wear of a motor vehicle friction clutch

• Main Author: HANS JURGEN DREXL
• Format: Patent
• Language: English
• Published: 15.09.1999
• Edition: 6
• Subjects: 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; 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; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; LIGHTING; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PHYSICS; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR; THERMAL INSULATION IN GENERAL; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

An arrangement for monitoring the state of wear of a friction clutch in the driving line of a motor vehicle driven by an internal combustion engine, comprises a wear-detection unit 16b, which responds to speed information supplied by a first tachometer 3b representing the instantaneous input speed of the friction clutch and speed information supplied by a movement sensor 5b, representing the beginning of the vehicle starting-off operation. The unit 16b measures the load on the friction clutch at the time of the starting-off operation, as a predetermined monotonic decreasing function of a value of the first speed information following the beginning of movement at a predetermined time interval or of an average of a plurality of values of the first speed information following each other at predetermined time intervals after the beginning of movement.