# US 2014/0195135 A1 · Vehicle drive control device

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- Number: US 2014/0195135 A1
- Document ID: US20140195135A1
- Status: Published application
- Kind: A1
- Application number: 14/124,154
- Filed: 2011-06-06
- Published: 2014-07-10
- Earliest claimed: 2011-06-06
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Inventors: Terufumi Miyazaki; Yukihiko Ideshio; Toshihiko Kamiya; Shingo Eto; Hironori Asaoka; Yasuyuki Kato; Seigo Kanou; Makoto Iwanaka
- Web page: https://patentgrep.com/patent/US20140195135A1

## CPC

- B60W 10/06: including control of combustion engines
- B60W 10/02: including control of driveline clutches
- B60W 10/08: including control of electric propulsion units, e.g. motors or generators
- B60W 10/10: including control of change-speed gearings
- 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)}
- B60W 30/1882: {characterised by the working point of the engine, e.g. by using engine output chart}
- 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}
- F02D 41/107: {and deceleration}
- B60W 2030/1809: {Without torque flow between driveshaft and engine, e.g. with clutch disengaged or transmission in neutral}
- Y02T 10/40: Engine management systems
- Y02T 10/62: Hybrid vehicles
- B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W)
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## 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

### Claim 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 η1 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 η2 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.

### Claim 2

(canceled)

### Claim 3

(canceled)

### Claim 4 (depends on 1)

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.