Electric energy charging control apparatus and method for hybrid vehicle

Inactive Publication Date: 2001-09-27
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If a battery is reduced in size, the battery capacity naturally reduces.
In that case, therefore, a problem arises when the battery is to be charged or discharged.
As a result, it becomes impossible to discharge an amount that is needed at the time of a vehicle start or acceleration.
A problem also arises at the time of deceleration.
That is, only a small amount of energy can be charged into the battery although a large amount of regenerative electric power is generated.
Thus, the amount of electric energ

Method used

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  • Electric energy charging control apparatus and method for hybrid vehicle
  • Electric energy charging control apparatus and method for hybrid vehicle
  • Electric energy charging control apparatus and method for hybrid vehicle

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Embodiment Construction

[0025] A preferred embodiment of the invention (hereinafter, referred to as "embodiment") will be described hereinafter with reference to the accompanying drawings.

[0026] FIG. 1 shows a conceptual diagram of a construction of a hybrid vehicle (HV) 10 in accordance with the embodiment of the invention. The hybrid vehicle 10 includes, as drive power sources, an internal combustion engine (hereinafter, simply referred to as "engine"), for example, a gasoline engine, a diesel engine, etc., and a motor-generator (MG) 14. In FIG. 1, the MG 14 is illustrated as an electric motor 14A and a generator 14B for the sake of convenience in illustration. However, in accordance with the running state of the hybrid vehicle 10, the electric motor 14A can function as a generator, and the generator 14B can function as an electric motor.

[0027] The hybrid vehicle 10 further includes: a speed reducer 18 for transmitting power generated by the engine 12 or the MG 14 toward a wheel side 16 and transmitting ...

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Abstract

A controller predicts a requested state of charge/discharge corresponding to a future run of a hybrid vehicle. If it is predicted that the hybrid vehicle will be stopped and restarted, or will be greatly accelerated and therefore that a request for a great discharge will be outputted in the future, the controller increases a target SOC of an HV battery to increase the value to which the charge of the HV battery will be converged in preparation for the great discharge. If it is predicted that a great regenerative electric power will be generated by a vehicle deceleration and therefore that a request for charging will be outputted, the target SOC is reduced, and the amount of charge in the HV battery is reduced, so that the regenerative power generated can be efficiency recovered.

Description

INCORPORATION BY REFERENCE[0001] The disclosure of Japanese Patent Application No. 2000-082748 filed on Mar. 23, 2000 including the specification, drawings and abstract is incorporated herein by reference in its entirety.[0002] 1. Field of the Invention[0003] The invention relates to electric energy charging control apparatus and method for a hybrid vehicle. More specifically, the invention relates to electric energy charging control apparatus and method for hybrid vehicle, that achieve efficient utilization of an electric energy storage device while allowing a size reduction of the electric energy storage device in a hybrid vehicle that needs a large amount of electric energy output in order to assist the running of the vehicle through the use of a motor-generator.[0004] 2. Description of the Related Art[0005] Vehicles equipped with hybrid vehicle (HV) systems that achieve great advantages in environmental protection and fuel economy improvement (hereinafter, referred to as "hybrid...

Claims

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Application Information

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IPC IPC(8): F02D29/02B60K6/20B60K6/445B60L3/00B60L11/18B60L15/20B60L50/15B60W10/08B60W10/26B60W20/00H01M10/44H02J7/00H02J7/14
CPCB60K6/48B60L11/123B60L11/14B60L11/1861B60L15/2045B60L2240/662B60W10/08B60W10/26B60W20/00B60W2510/244B60W2510/305B60W2520/10B60W2530/00B60W2550/12Y02T10/6217Y02T10/6221Y02T10/7005Y02T10/7044Y02T10/705Y02T10/7077Y02T10/7283Y02T10/7291Y02T10/84Y02T90/16Y10S903/903B60W50/0097B60L50/16B60L50/61B60L58/12B60W2555/20Y02T10/62Y02T10/64Y02T10/70Y02T10/7072Y02T10/72B60W10/24B60W20/10B60W2710/244
Inventor SUZUKI, NAOTO
Owner TOYOTA JIDOSHA KK
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