HEATER ENERGIZATION CONTROLLER OF A/F SENSOR

To shorten a time until the temperature of a plurality of A/F sensors reach an activation temperature, while reducing a load on a power source system in a case where the A/F sensors are in a low-temperature state.SOLUTION: In a heater energization controller 11, when at least one of temperatures of...

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Bibliographische Detailangaben
Hauptverfasser:	FUKUHARA KOHEI, INOUE KEITA
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BLASTING COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES LIGHTING MEASURING MECHANICAL ENGINEERING PHYSICS TESTING WEAPONS
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Beschreibung
Zusammenfassung:	To shorten a time until the temperature of a plurality of A/F sensors reach an activation temperature, while reducing a load on a power source system in a case where the A/F sensors are in a low-temperature state.SOLUTION: In a heater energization controller 11, when at least one of temperatures of A/F sensors 1(1), 1(2) detected by temperature detection units 18(1), 18(2) is below a predetermined value, a microcomputer 12 energizes heaters 4(1), 4(2) one by one to perform initial energization control for controlling energization switches 14(1), 14(2) so as to activate the A/F sensors 1(1), 1(2) in parallel.SELECTED DRAWING: Figure 1 【課題】Ａ／Ｆセンサが低温状態にある場合の電源系統への負荷を低減しつつ、複数のＡ／Ｆセンサが活性化温度に到達するまでの時間を短縮する。【解決手段】ヒータ通電制御装置１１において、マイコン１２は、温度検出部１８（１）、１８（２）により検出されるＡ／Ｆセンサ１（１）、１（２）の温度のうち少なくとも１つが所定値以下であれば、ヒータ４（１）、４（２）に１つずつに通電を行うことで、Ａ／Ｆセンサ１（１）、１（２）の活性化を並行的に図るように通電スイッチ１４（１）、１４（２）を制御する初期通電制御を行なう。【選択図】図１