Patent ID: 8285464
Filing Date: 2012-10-09
Classification: F16D

Abstract:
1. A half-clutch state decision device deciding a half-clutch state of a clutch in a vehicle wherein a manual transmission is connected to an output side of an engine via the clutch, comprising: an engine rotation-speed detection member detecting a rotation speed of the engine, a stop detection member detecting stopping of the vehicle, a frequency extraction member extracting a high-frequency component and a low-frequency component of the engine rotation speed through a filtering process when the engine rotation speed has dropped while the vehicle is stopped, a locus length calculation member calculating a locus length of the high-frequency component and a locus length of the low-frequency component through accumulation of each of the high-frequency component and the low-frequency component, and a decision member deciding whether or not the clutch is in a half-clutch state from a relationship between the locus length of the high-frequency component and the locus length of the low-frequency component calculated by the locus length calculation member.