Control device for vehicle

Abstract

It is determined whether or not an automatic transmission is in a pre-gear shift state determined in advance prior to a power-ON gear shift in which torque-down control is performed. When the automatic transmission is in the pre-gear shift state, since a required free capacity is secured in a capacitor, torque-down control of a second motor generator is performed in a gear shift, and even if surplus power is generated in a power supply circuit due to the torque-down control, the surplus power can be quickly absorbed using the capacitor. Since a required free capacity is secured in the capacitor by determining whether or not the automatic transmission is in the pre-gear shift state, a predetermined free capacity does not need to be secured constantly, normal capacitor storage control focusing on drivability or the like can be performed normally, and use restriction of the capacitor is minimized.

Description

technical field [0001] The present invention relates to a control device for a vehicle including an electric motor as a driving force source for running, and particularly, to surplus electric power generated in a power supply circuit during torque reduction control in shifting of an automatic transmission . Background technique [0002] An electric motor having (a) an electric motor as a driving force source for traveling, (b) an automatic transmission provided between the electric motor and drive wheels, and (c) provided in a power supply circuit of the electric motor and configured to be capable of charging and Vehicles that discharge electrical storage devices are well known. The vehicle described in WO 2011 / 077581A is an example of such a vehicle, and relates to a hybrid vehicle including an engine other than an electric motor (second electric motor MG2 ) as a driving force source for traveling, and Batteries (secondary batteries) such as lithium ion batteries are used...

AI Technical Summary

Problems solved by technology

For example, if the motor torque changes to the regenerative side due to rapid torque reduction, while regenerative power is generated and a large surplus power is generated in the power supply circuit due to the regenerative power, it cannot be performed in a battery with a low charge / discharge rate. Sufficiently absorb (charge) surplus power

For this reason, the reduction amount or reduction speed of the motor torque is limited to such an extent that the surplus power can be absorbed by the battery

Images