Lock-up-clutch control device and control method

A transmission ECU for controlling a lock-up clutch uses the difference (u*-u) between a target slip speed (u*) and an actual slip speed (u), proportional term gain (Kp), and integral term gain (Ki) to set (S150) a feedback term (FB) for an oil-pressure command value (Up), said feedback term (FB) in...

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Bibliographic Details
Main Authors KUSABE KEIICHIROU, IZAWA JIN, KOBAYASHI YASUHIKO
Format Patent
LanguageEnglish
Published 26.08.2015
Subjects
BLASTING
ENGINEERING ELEMENTS AND UNITS
GEARING
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MECHANICAL ENGINEERING
THERMAL INSULATION IN GENERAL
WEAPONS
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Summary:A transmission ECU for controlling a lock-up clutch uses the difference (u*-u) between a target slip speed (u*) and an actual slip speed (u), proportional term gain (Kp), and integral term gain (Ki) to set (S150) a feedback term (FB) for an oil-pressure command value (Up), said feedback term (FB) including a proportional term (FBp) and an integral term (FBi), and uses the oil-pressure command value (Up) including the feedback term (FB) to implement (S160, S170) slip control which causes the actual slip speed (u), i.e. the difference in actual rotational speed between an engine and an input shaft of an automatic transmission, to match the target slip speed (u*). When implementing slip control, input rotational frequency (Nin) of the automatic transmission (30) is acquired (S100), and at least the integral term gain (Ki) is changed (S140) in accordance with the input rotational frequency (Nin).
Bibliography:Application Number: CN201480003630