Electric vehicle

Patent metadata

Field	Value
Publication number	US-9738177-B2
Application number	US-201615222242-A
Country	US
Kind code	B2
Filing date	Jul 28, 2016
Priority date	Jul 30, 2015
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

Provided is an electric vehicle, including: motors configured to apply braking/driving torques to drive wheels via gear-type speed reducers; a braking apparatus; and a control device configured to calculate, for each drive wheel, a final target torque, which is a sum of a first target torque that is based on a braking/driving operation amount of a driver and a second target torque for controlling a travel behavior of the electric vehicle, and control the motors and the braking apparatus so that an actual braking/driving torque of the drive wheel reaches the final target torque. When the final target torque is a braking torque under a situation in which the first target torque is a driving torque, the final target torque is corrected to a value that is not a braking torque.

First claim

What is claimed is:

1. An electric vehicle, comprising:
motors each configured to apply a driving torque to a corresponding drive wheel via each gear-type speed reducer;
a braking apparatus configured to apply a braking torque to each drive wheel independently of one another; and
a control device configured to:
calculate, for each drive wheel, a final target braking/driving torque, which is a sum of a first target braking/driving torque that is based on a braking/driving operation amount of a driver and a second target braking/driving torque for controlling a travel behavior of the electric vehicle; and
control the motors and the braking apparatus so that an actual braking/driving torque of the each drive wheel reaches the final target braking/driving torque,

wherein the control device is configured to correct, when the final target braking/driving torque is a braking torque under a situation in which the first target braking/driving torque is a driving torque, the final target braking/driving torque to a first predetermined value, which is any one of a driving torque and 0.

2. The electric vehicle according to claim 1 , wherein the control device is configured to correct, when the final target braking/driving torque is a driving torque under a situation in which the first target braking/driving torque is a braking torque, the final target braking/driving torque to a second predetermined value, which is any one of a braking torque and 0.

Assignees

• Toyota Motor Co Ltd

Inventors

• Fukudome Hideki

Classifications

• B60L2240/423

  Torque · CPC title

• B60T2270/60

  Regenerative braking · CPC title

• B60T8/1755

  Brake regulation specially adapted to control the stability of the vehicle, e.g. taking into account yaw rate or transverse acceleration in a curve (road vehicle drive control systems for control of driving stability otherwise than by controlling a particular sub-unit B60W30/02) · CPC title

• B60T2201/03

  Brake assistants · CPC title

• B60T13/662

  characterised by specified functions of the control system components · CPC title