VEHICLE DRIVE CONTROL DEVICE

• US 20140195135A1
• Filed: 06/06/2011
• Published: 07/10/2014
• Est. Priority Date: 06/06/2011
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Miyazaki, Terufumi, Ideshio, Yukihiko, Kamiya, Toshihiko, Eto, Shingo, Asaoka, Hironori, Kato, Yasuyuki, Kanou, Seigo, Iwanaka, Makoto
• Granted Patent: US 9,902,389 B2
• Time in Patent Office: Days
• US Class Current: 701/102
• CPC Class Codes: B60W 10/02 including control of driveline clutches
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/10 including control of change-speed gearings
• CPC Class Codes: B60W 20/11 using model predictive control [MPC] strategies, i.e. control methods based on models predicting performance utilising navigation and traffic information in the control strategy B60W20/12
• CPC Class Codes: B60W 2030/1809 Without torque flow between driveshaft and engine, e.g. with clutch disengaged or transmission in neutral
• CPC Class Codes: B60W 30/1882 characterised by the working point of the engine, e.g. by using engine output chart
• CPC Class Codes: F02D 11/105 characterised by the function converting demand to actuation, e.g. a map indicating relations between an accelerator pedal position and throttle valve opening or target engine torque
• CPC Class Codes: F02D 41/107 and deceleration
• CPC Class Codes: Y02T 10/40 Engine management systems
• CPC Class Codes: Y02T 10/62 Hybrid vehicles

Abstract

A vehicle drive control device performs acceleration/deceleration running by alternately repeating acceleration running and deceleration running, wherein it compares between an efficiency of the motor at a first operation point determined by a rotation speed and a torque of a motor and an efficiency of the motor at a second operation point for outputting a higher torque than the first operation point, and if a difference between the efficiencies is greater than a determination value, the acceleration running at the second operation point and the deceleration running being repeated, the second operation point being set a maximum efficiency line of the motor with the rotation speed and the torque of the motor as parameters to perform the acceleration running, and if acceleration during the acceleration running becomes larger than an acceleration limit value, a rotating machine acting at least as an electric generator generating electricity to charge a battery.

Claims

1. A vehicle drive control device performing acceleration/deceleration running by alternately repeating acceleration running by operation of a motor and deceleration running by stopping of the motor or interruption of power transmission from the motor, the vehicle drive control device being configured

to make a comparison between an efficiency η

1 of the motor at a first operation point determined by a rotation speed and a torque of the motor during normal running while the motor is operated depending on an output request amount and an efficiency η

2 of the motor at a second operation point for outputting a higher torque than the first operation point, and if a difference between the efficiencies is greater than a predetermined determination value, the acceleration running at the second operation point and the deceleration running being repeated,

to store a maximum efficiency line of the motor with the rotation speed and the torque of the motor as parameters in advance, and the second operation point being set on the maximum efficiency line to perform the acceleration running, and

to include a rotating machine acting at least as an electric generator in a power transmission path between the motor and wheels, and if acceleration during the acceleration running becomes larger than a predetermined acceleration limit value, the rotating machine generating electricity to charge a battery.

4. The vehicle drive control device of claim 1, wherein

the acceleration limit value is set by using a vehicle speed as a parameter so as to allow larger acceleration during lower vehicle speed as compared to during higher vehicle speed.

2. (canceled)

3. (canceled)