Title:
OIL PRESSURE CONTROL DEVICE
Document Type and Number:
Japanese Patent JP3456168
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To accelerate a drive shaft without entailing blow-up of an internal combustion engine or a motor and improve energy efficiency of the device.
SOLUTION: In a transmission system in which oil pressure necessary for a transmission or the like is obtained by an engine-driven mechanical oil pump and a motordriven oil pump, the motor-driven pump secures the oil pressure when operation of an engine is being halted; however, when the oil pressure is not required, operation of the motor-driven oil pump is also brought to a halt for the purpose of improving efficiency. At the time of the restart of the operation of the motordriven oil pump, whether or not there are possibilities such as an abrupt start and abrupt acceleration of a vehicle made by a driver is first determined based on a shift position SP, car speed V and a brake switch BS (S102-S106), the target number of revolutions Nm* larger than the ordinary number of revolutions Nset is set when any of the possibilities is present (S110), and then an oil pump motor is driven and controlled (S112). As a result, the oil pressure quickly rises, and blow-up of the engine or the motor can be prevented.
Inventors:
Atsushi Tabata
Yutaka Taga
Masashi Nakamura
Masaya Amano
Kojun Endo
Kazumi Hoshiya
Hidehiro Ohba
Yutaka Taga
Masashi Nakamura
Masaya Amano
Kojun Endo
Kazumi Hoshiya
Hidehiro Ohba
Application Number:
JP17955399A
Publication Date:
October 14, 2003
Filing Date:
June 25, 1999
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
B60K11/02; B60K6/20; B60K6/485; B60K6/54; B60K6/547; B60K8/00; B60W10/02; B60W10/30; B60W20/00; F16H61/00; (IPC1-7): F16H61/00; B60K6/04
Domestic Patent References:
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Attorney, Agent or Firm:
Kenji Yoshida (1 person outside)