| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent erroneous learning due to erroneous detection of the torque point when learning the initial control value of a hydraulic clutch by detecting the torque point of the hydraulic clutch based on the inlet air negative pressure. <P>SOLUTION: The initial control value of a hydraulic clutch 28 is learned based on variations in the inlet air negative pressure of an engine in a process in which the oil pressure command value of the hydraulic clutch 28 is reduced or increased. If a change in load of an engine E due to a state that the hydraulic clutch 28 reaches the torque point is detected by the engine speed, the detection accuracy is deteriorated by being affected by the inertia of the engine E or a power transmission path. However, the detection accuracy is improved by detecting a change in load of the engine E by the inlet air negative pressure PB. A learning inhibition means inhibits learning by an initial control value learning means based on the second-order differential value of the inlet air negative pressure calculated by a second-order differential value calculating means. Therefore, it is possible to previously prevent the execution of erroneous learning when the inlet air negative pressure is changed by a factor other than variations in load of the single engine. <P>COPYRIGHT: (C)2013,JPO&INPIT |
