ON-VEHICLE POWER DISTRIBUTION DEVICE

To provide an on-vehicle power distribution device which easily performs additional connection of even new electrical components and new functions that are not assumed at design time thereof without making parts such as a wiring harness or the like larger than necessary.SOLUTION: Priority of each lo...

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1. Verfasser: IWASAKI KATSUYUKI
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide an on-vehicle power distribution device which easily performs additional connection of even new electrical components and new functions that are not assumed at design time thereof without making parts such as a wiring harness or the like larger than necessary.SOLUTION: Priority of each load, which is connected to a downstream side of an ECU having power source power distribution function has been previously grasped. Each power source current Ix flowing to each load is detected, and a total current value Iy flowing an electric wire on an upstream side of the ECU is calculated. A relation of "upstream electric wire smoke generation characteristic C0>upstream fuse fusion cutting characteristic C1>power control characteristic C2" is established, and when the total current value Iy approaches the power control characteristic C2, electric conduction of a load with lower priority is blocked or switched to PWM control to reduce the total current value Iy.SELECTED DRAWING: Figure 1 【課題】ワイヤハーネス等の部品を必要以上に大型化することなく、設計時に想定していない新たな電装品や新たな機能であっても、その追加接続を容易にする車載電力分配装置を提供する。【解決手段】電源電力の分配機能を有するECUの下流側に接続される各負荷の優先度を事前に把握しておく。各負荷に流れる電源電流Ixをそれぞれ検出し、ECUの上流側の電線に流れる総電流値Iyを算出する。「上流電線発煙特性C0>上流ヒューズ溶断特性C1>電力制御特性C2」とし、総電流値Iyが電力制御特性C2に近づいた場合には、優先度が低い負荷の通電を遮断、又はPWM制御に切り替えて総電流値Iyを削減する。【選択図】図1