Interrelated power delivery controls – including engine control – Transmission control – Engine controlled by transmission
Patent
1995-06-06
1996-11-12
Ta, Khoi Q.
Interrelated power delivery controls, including engine control
Transmission control
Engine controlled by transmission
477110, 477159, B60K 4108, F16H 6100
Patent
active
055734766
ABSTRACT:
A controller (100 in FIG. 1) for relieving a gear shift shock in a vehicle, having an input torque calculation portion (131) which calculates the input torque (T.sub.t) of the stepped automatic transmission mechanism of the vehicle from engine r.p.m. (N.sub.e) and turbine r.p.m. (N.sub.e), a shift start recognition portion (134) which recognizes the real mechanical shift start timing of the stepped automatic transmission mechanism in accordance with the change of the input torque (T.sub.t), a line-pressure correction magnitude calculation portion (142) which calculates a line-pressure correction magnitude (.DELTA.PL) during the gear shift operation of the stepped automatic transmission mechanism when the shift start has been recognized, a standard line pressure calculation portion (143) which calculates a standard line pressure (PL), and a command line pressure calculation portion (144) which adds the line-pressure correction magnitude (.DELTA.PL) to the standard line pressure (PL) and which delivers the resulting sum to a valve (52) for controlling the oil pressure of the hydraulic circuit of the stepped automatic transmission mechanism.
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Communication from European Patent Office dated Sep. 4, 1995.
U.S. Patent Application No. 07/859,987, filed on Mar. 30, 1992.
Ishii Junich
Kimura Hiroshi
Minowa Toshimichi
Ozaki Naoyuki
Shiraishi Takashi
Hitachi , Ltd.
Ta Khoi Q.
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