SLIP DETERMINATION SYSTEM FOR VEHICLE

A slip determination system for a vehicle, which is capable of improving the determination accuracy by avoiding erroneous determination of excessive slip of wheels when a state of the wheels, driven/braked by motors, is switched. In the slip determination system according to the present invention, w...

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Bibliographische Detailangaben
Hauptverfasser:	NOGUCHI, MASATOSHI, ANDO, SATOSHI, SAKAGUCHI, YUSUKE
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL 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 BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL INSTRUMENTATION OR DASHBOARDS FOR VEHICLES MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES PERFORMING OPERATIONS PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES TRANSPORTING VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	A slip determination system for a vehicle, which is capable of improving the determination accuracy by avoiding erroneous determination of excessive slip of wheels when a state of the wheels, driven/braked by motors, is switched. In the slip determination system according to the present invention, when first and second motor rotational speeds (NMOT1, NMOT2), which are rotational speeds of rear motors (41, 61) which brake/drive rear wheels (WRL, WRR), reach a reference rotational speed (NMREF) set based on wheel rotational speeds (NWFL, NWFR, NWRL, NWRR), it is determined that excessive slip has occurred in the rear wheels (WRL, WRR) (FIG. 9). When the sign of a target torque (TR OBJ) of the rear motors (41, 61) is inverted, the reference rotational speed (NMREF) is changed to a value more difficult to be reached by the first and second motor rotational speeds (NMOT1, NMOT2) (steps 28 and 29 in FIG. 8), or the excessive slip determination is inhibited (step 51 in FIG. 12).