Direct coupling clutch control device for automatic transmission

Abstract

Abstract PURPOSE:To prevent the occurrence of a judder and to sufficiently ensure the slip region of a direct coupling clutch by deciding whether a direct coupling clutch is engaged in a slip state based on the total degree of satisfaction determined by a computing means. CONSTITUTION:In consideration of a vehicle state related to an L/U shift pattern according to a control rule based on a fuzzy inference, the total degree Lu (ON) of satisfaction at which an L/U clutch 20 is brought into an engaging state, the total degree Lu (OFF) of satisfaction at which the clutch is brought into a release state, and the total degree Lu (SL) of satisfaction at which the clutch is brought into a slip state are respectively calculated. When ON is selected, a drive signal SD having a duty ratio of 100% is outputted from an L/U clutch control device 64, a solenoid on-off valve 34 is completely closed, and the L/U clutch 20 is brought into an engaging state. When SL is selected, a drive signal SD having a given duty ratio is outputted, the solenoid valve 34 is opened and closed at the duty ratio, and the L/U clutch 20 is brought into a slip state.

Inventors

• 👤 Mitsuru Takada
• 👤 充 高田
• 👤 Kojiro Kuramochi
• 👤 倉持　耕治郎

Bibliographic Details