ABNORMALITY DETERMINATION DEVICE OF INTAKE AIR AMOUNT SENSOR

PROBLEM TO BE SOLVED: To provide an abnormality determination device capable of accurately determining whether an intake air amount sensor is normal or abnormal.SOLUTION: A flow rate calculating section 51 calculates an intake air amount M of an engine from an intake air temperature of the engine, a...

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Bibliographic Details
Main Authors KUWATA MASASHI, OZAWA IKUO
Format Patent
LanguageEnglish
Japanese
Published 08.11.2018
Subjects
BLASTING
COMBUSTION ENGINES
CONTROLLING COMBUSTION ENGINES
HEATING
HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
LIGHTING
MECHANICAL ENGINEERING
WEAPONS
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Summary:PROBLEM TO BE SOLVED: To provide an abnormality determination device capable of accurately determining whether an intake air amount sensor is normal or abnormal.SOLUTION: A flow rate calculating section 51 calculates an intake air amount M of an engine from an intake air temperature of the engine, an intake manifold pressure (intake air pressure), a throttle opening, and an atmospheric pressure. A moderating section 52 calculates a moderated value of the calculated intake air amount M. A moderating section 53 calculates a moderated value of an intake amount Gdetected by an air flow sensor. An abnormality determining section 54 determines abnormality of the air flow sensor 31 when the difference between the calculated values exceeds a prescribed range.SELECTED DRAWING: Figure 2 【課題】吸入空気量センサの正常／異常を精度よく判定できる、異常判定装置を提供する。【解決手段】流量計算部５１では、エンジンの吸気温、インマニ圧（吸気圧）、スロットル開度および大気圧からエンジンの吸入空気量Ｍが算出される。そして、なまし部５２では、その算出された吸入空気量Ｍのなまし値が算出される。一方、なまし部５３では、エアフロセンサによって検出される吸気量ＧＡＩＲのなまし値が算出される。そして、異常判定部５４では、両算出値の差分が所定範囲を超えている場合、エアフロセンサ３１の異常が判定される。【選択図】図２
Bibliography:Application Number: JP20170073329