| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To permanently hold a rotating position of an output shaft when a torque diode inserted to an irreversible rotation transmission system is locked on by reduction of input torque to zero. <P>SOLUTION: After completion t1 of control to make a crankshaft rotating angleθbecome a target valueθs by motor torque Tm, when the motor torque Tm is reduced toward zero, the motor torque Tm is not reduced to zero at once at t1 but is reduced at a predetermined time change gradientΔTm to finally reach zero. The reduction speedΔTm of the motor torque Tm is set equal to or less than an upper limit valueΔTm_max of motor torque reduction speed which enables transition of the torque diode from a lock-off state to a lock-on state caused by reduction in the motor torque Tm to be performed while the crankshaft rotating angleθis maintained at the target valueθs, and is preferably defined to satisfyΔTm=ΔTm_max. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
