Loading patent…
AssigneesNissan Motor Co., Ltd., JATCO Ltd
InventorsKatsumi Doihara, Yoshihisa Kodama, Yasuaki Yoshikawa, Kenta Nakamura, Tomoyuki Mizuochi, Kiyotaka Sawano, Masahiro Nishi, Hidemasa Kawaguchi, Keisuke Koyama
Estimating the term…
A control device controls a belt type continuously variable transmission including a belt slip controller and a belt slip control permission determining unit. The device decreases belt friction when an estimated accuracy of a belt slip condition is high and prevents a belt from greatly slipping when an estimated accuracy is low. The device includes primary and secondary pulleys and the belt, and controls a gear ratio based on a running radius of the belt on a pulley by controlling primary and secondary oil pressures. The controller oscillates a secondary oil pressure, estimates the belt slip condition by monitoring a phase difference between oscillation components, and reduces an actual secondary oil pressure to maintain a predetermined belt slip condition. The determining unit permits belt slip control when a torque change speed input to the transmission mechanism is less than a predetermined value.
A control device for a belt type continuously variable transmission, comprising a primary pulley receiving an input from a drive source, a secondary pulley providing an output to a drive wheel, and a belt wound around the primary pulley and the secondary pulley so as to control a gear ratio determined by a running radius ratio of the belt on the pulleys by controlling a primary hydraulic pressure to the primary pulley and a secondary hydraulic pressure to the secondary pulley, the device further comprising:
A control method for a belt type continuously variable transmission by a belt slip control in which a belt slip condition among a primary pulley, a secondary pulley, and a belt is controlled with a hydraulic pressure, the method comprising:
A control method for a belt type continuously variable transmission by a belt slip control in which a belt slip condition among a primary pulley, a secondary pulley, and a belt is controlled with a hydraulic pressure, the method comprising:
A control method for a belt type continuously variable transmission by a belt slip control in which a belt slip condition among a primary pulley, a secondary pulley, and a belt is controlled with a hydraulic pressure, the method comprising:
A control device for a belt type continuously variable transmission, comprising a primary pulley receiving an input from a drive source, a secondary pulley providing an output to a drive wheel, and a belt wound around the primary pulley and the secondary pulley so as to control a gear ratio determined by a running radius ratio of the belt on the pulleys by controlling a primary hydraulic pressure to the primary pulley and a secondary hydraulic pressure to the secondary pulley, the device further comprising:
Dependencies are inferred from the claim text.