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Process for improving fuel economy of mixed power vehicle

A hybrid vehicle, fuel economy technology, applied to hybrid vehicles, motor vehicles, electric vehicles, etc., can solve the problems of a large number of temperature and SOC monitors, expensive temperature and SOC monitors, and inaccuracy

Inactive Publication Date: 2008-01-30
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional temperature and SOC monitors are expensive and inaccurate
Conventional temperature and SOC monitors also require significant additional wiring and additional electronics

Method used

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  • Process for improving fuel economy of mixed power vehicle
  • Process for improving fuel economy of mixed power vehicle
  • Process for improving fuel economy of mixed power vehicle

Examples

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Embodiment Construction

[0025] The following description of the preferred embodiments is exemplary only and is not intended to limit the invention, application or use in any way. For purposes of clarity, the same reference numbers are used in the drawings to refer to the same elements.

[0026] In addition to keeping the output voltage within a certain voltage range, a voltage regulator in a DC / DC converter varies the output voltage within a voltage range to accommodate changes under various operating conditions. When doing so, the system preserves battery life and improves hybrid vehicle fuel economy. First, the voltage regulator signals the DC / DC converter to produce an output voltage near the top of the voltage range when the engine is started. If the engine is running briefly, recharge the battery before shutting down the engine.

[0027] When the battery is fully recharged while the engine is running, the voltage regulator reduces the output voltage of the DC / DC converter to around the lower l...

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Abstract

A method for controlling the fuel of mixed power vehicle economically, including: estimating battery temperature, measuring battery current and voltage. To determine standard optimal charging voltage based on the charging state (soc) and the estimated temperature of the barrety. If SOC is above to prescribed value and the current locates the prescribed range, to decrease the standard optimal charging voltage to the charging voltage of minimal fuel economy. Then, to charge for the battery with minimal fuel economy by means of a DC / DC converter.

Description

technical field [0001] The present invention relates to non-propulsion batteries for recharging hybrid vehicles, and more particularly, to a battery recharging method and apparatus for improving battery life, headlight life, and fuel economy of hybrid vehicles. Background technique [0002] A conventional non-propulsion vehicle battery is an electrochemical device that includes one or more cells that convert chemical energy into electrical energy. Currently, non-propulsion vehicle batteries are "12 volt" direct current (DC) batteries, which provide approximately 12.6 volts. A conventional 12 volt battery typically consists of six cells connected in series, each producing about 2.1 volts. Hybrid vehicles include one or more additional propulsion batteries that can provide power to propel and / or restart the vehicle. The propulsion batteries are typically high power, eg "300 volt" direct current (DC) batteries. Unless otherwise stated, the term "battery" hereinafter refers t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W20/00H01M10/44H02J7/14B60L50/15
CPCB60L1/02H02J7/1461B60L11/12B60L2210/10Y02T10/7216Y02T10/7077B60L1/003Y02T10/7005H02J7/1438B60L50/15Y02T10/72Y02T10/7072Y02T10/70H02J7/00306H02J7/0048
Inventor R·K·塞雷尔斯W·J·奥梅尔R·M·布里斯
Owner GM GLOBAL TECH OPERATIONS LLC
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