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Title:
SPEED CHANGE CLUTCH CONTROL APPARATUS
Document Type and Number:
WIPO Patent Application WO/2008/062690
Kind Code:
A1
Abstract:
A speed change clutch control apparatus capable of performing an appropriate making-and-breaking control of a speed change clutch independently of disturbances, such as battery voltage variation, temperature variation and so on. There are included a linear solenoid valve (31) which is disposed in a pipe for supplying an oil pressure to a speed change clutch (3) and the opening of which is changed in accordance with the value of an supplied current; a drive circuit (C) that changes, in accordance with an input drive signal, the value of the supplied current to be supplied to the linear solenoid valve (31); a control means (22) that stores a group of target drive signals (So) to be inputted to the drive circuit (C) when the speed change clutch (3) is made or broken; and a sensor that determines the value (Ir) of an actual supplied current flowing through the linear solenoid (31). Before breaking the speed change clutch (3) during a speed change of a transmission (T/M), the control means (22) inputs, to the drive circuit (C), such a predetermined test drive signal (St) that the current flowing through the linear solenoid valve (31) exhibits a predetermined test current value (It). The control means (22) then determines a deviation (ε) between the test current value (It) and that value (Ir) of the actual supplied current actually flowing through the linear solenoid valve (31) which is determined by the sensor (32), and then corrects, based on the determined deviation (ε), the group of target drive signals (So). The control means (22) then inputs the corrected group of target drive signals (So) to the drive circuit (C), thereby performing a making control of the speed change clutch (3).

Inventors:
EBARA TATSUHIKO (JP)
IIJIMA TAKAO (JP)
OHTA TOMOKO (JP)
Application Number:
PCT/JP2007/071977
Publication Date:
May 29, 2008
Filing Date:
November 13, 2007
Export Citation:
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Assignee:
ISUZU MOTORS LTD (JP)
EBARA TATSUHIKO (JP)
IIJIMA TAKAO (JP)
OHTA TOMOKO (JP)
International Classes:
F16H61/02; F16K31/06; F16H59/68; F16H61/682
Foreign References:
JPH11166658A1999-06-22
Attorney, Agent or Firm:
KINUTANI, Nobuo (15-12 Nishi-Shimbashi 3-chom, Minato-ku Tokyo 03, JP)
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