ELECTRONIC CONTROLLER FOR A CVT RATIO

• Main Authors: BRIAN R. GILLINGHAM, JEFFREY IVAN PETERMAN, PETER J. ERASMUS, PHILIPP MEYER, URS WENGER, RONALD ZURBRUEGG, STEPHEN L. NELSON, DONOVAN L. FREDRICKSON, BRIAN D. KROSSCHELL, DONALD E. FROST, BEAT KOHLER, KARL GRAJKOWSKI
• Format: Patent
• Language: English; Spanish
• Published: 05.06.2014
• Subjects: BLASTING; CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE ORDIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ENGINEERING ELEMENTS AND UNITS; GEARING; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TOTHE CONTROL OF A PARTICULAR SUB-UNIT; THERMAL INSULATION IN GENERAL; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

A continuously variable transmission (CVT) is provided for use on a recreational or utility vehicle. The CVT is electronically controlled by at least one control unit of the vehicle. The CVT includes a primary pulley (50) having a first sheave (100) and a second sheave (102)moveable relative to the first sheave. An actuator controls movement of the second sheave. The method includes: determining a speed of the engine (452); detecting a throttle demand (458); determining a pulley control variable (K-Factor) based on an operator input device (111), the CVT including a first and a second pulley, the first pulley (50) being moveable by an actuator (76) to modulate a gear ratio of the CVT; calculating a target engine speed (460) based on the throttle demand and the pulley control variable; and calculating a target position (470) of the first pulley of the CVT based on the calculated target engine speed and the determined speed of the engine. Se proporciona una transmisión continuamente variable (CVT) para el uso en un vehículo recreativo o utilitario. La CVT se controla electrónicamente por al menos una unidad de control del vehículo. La CVT incluye una polea primaria (50) que tiene una primera polea acanalada (100) y una segunda polea acanalada (102) que se puede mover con relación a la primera polea acanalada. Un accionador controla el movimiento de la segunda polea acanalada. El método incluye: determinar una velocidad del motor (452); determinar una demanda del regulador (458); determinar una variable de control de polea (factor K) con base en un dispositivo de entrada del operador (111), la CVT que incluyen una primera y una segunda polea, la primera polea (50) que se puede mover por un accionador (76) para modular una relación de engranes de la CVT; calcular una velocidad objetivo del motor (460) con base en la demanda del regulador y la variables de control de polea; y calcular una posición objetivo (470) de la primera polea de la CVT con base en la velocidad objetivo calculada del motor y la velocidad determinada del motor.