CONTROL DEVICE FOR VEHICLE WITH MULTISTAGE AUTOMATIC TRANSMISSION

摘要

PROBLEM TO BE SOLVED: To suppress increase in the size of an electric oil pump and suppress electric power consumption while enabling supply of hydraulic pressure to a friction fastening element of a transmission while idle stop control during deceleration is performed in a vehicle that performs the idle stop control during deceleration.SOLUTION: A vehicle includes: an engine; an electric oil pump; a mechanical oil pump driven by the revolution of the engine; and a step automatic transmission having a first gear shift stage that can be formed by the operation of the electric oil pump and a second gear shift stage that cannot be formed by the operation of the electric pump but can be formed by the operation of the mechanical oil pump. During the deceleration of the vehicle, when combustion of the engine is stopped, the engine is in a predetermined revolution decline state and the driving state of the vehicle is in a state corresponding to the second gear shift stage, the electric oil pump is driven and gear shift from the second gear shift stage to the first gear shift stage is performed.SELECTED DRAWING: Figure 6