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Patent Searching and Data


Title:
DEVICE FOR CONTROLLING BELT CLAMPING FORCE IN V-BELT CONTINUOUSLY VARIABLE TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2013/105444
Kind Code:
A1
Abstract:
The case of braking slowly at first and then braking suddenly on a low µ road so that the brake stroke (STb) and the anticipated brake stroke (STb_(2)) change as illustrated is explained: after a start-of-braking determination time (t1) when the brake switch signal (SWb) switches from OFF to ON, a determination is made whether the braking is sudden or not by whether or not (STb_(2)) is at or above a sudden braking determination threshold (STb_s). During slow braking prior to the sudden braking determination time (t2) when (STb_(2))≥(STb_s), the slow braking inertial torque (Tj) is set to be smaller in the period (t1)-(t2) than the inertial torque during sudden braking after (t2) as shown by the solid line. The belt clamping force is controlled based on the primary input torque during slow braking, which is obtained by subtracting (Tj) from the transmission input torque. As a result, the increase in belt clamping force during slow braking is reduced as compared to during sudden braking by the area indicated by the hatching, making it possible to prevent the increase from becoming excessive.

Inventors:
OKUDAIRA KEITA (JP)
HOSOKAWA YUUSUKE (JP)
Application Number:
JP2012/083772
Publication Date:
July 18, 2013
Filing Date:
December 27, 2012
Export Citation:
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Assignee:
NISSAN MOTOR CO.,LTD. (2 Takara-cho, Kanagawa-ku Yokohama-sh, Kanagawa 23, 〒2210023, JP)
International Classes:
F16H61/662; F16H9/12; F16H59/54; F16H61/02
Foreign References:
JP2010159854A
JP2007285510A
JP2011220388A
JP2010007834A
JP2001330120A
Attorney, Agent or Firm:
AYATA Masamichi (203 Royal-Chateau-Kawasaki, 22-2 Omiya-cho Saiwai-ku, Kawasaki-sh, Kanagawa 14, 〒2120014, JP)
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Claims: