ENGINE CONTROL DEVICE

PROBLEM TO BE SOLVED: To provide an engine control device for suppressing the repeat of an event by a second counter of a shorter period than that of a first counter, in accordance with the correction of a count value, and the long-term nonoccurrence of the event.SOLUTION: A plurality of counters fo...

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Main Authors YAMASHITA MASASHI, KAMEGAI YUSUKE, NAKAGAWA YU, WAKABAYASHI TETSUAKI, UMEYAMA SHIGETO, FUJISHIMA SHUNSUKE, OKUHARA MAKOTO
Format Patent
LanguageEnglish
Japanese
Published 02.03.2015
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Summary:PROBLEM TO BE SOLVED: To provide an engine control device for suppressing the repeat of an event by a second counter of a shorter period than that of a first counter, in accordance with the correction of a count value, and the long-term nonoccurrence of the event.SOLUTION: A plurality of counters for a count-up based on a multiplication signal comprises a first counter (72) and a second counter (74) having a shorter period than that of the first counter. Means (58) for setting a correction value to correct a count-up cause of the multiplication signal sets, at a predetermined timing based on a missing tooth portion, the difference between the count value of the first counter and a reference value as a first correction value, and sets the value, which is less than the count number of one period of the second counter and in which the reset timing of the second counter is unvaried compared to the case where the first correction value is set, is set as a second correction value. The first counter counts up on the basis of the multiplication signal corrected by the first correction value, and the second counter counts up on the basis of the multiplication signal corrected by the second correction value. 【課題】カウント値の補正にともない、第1カウンタよりも周期の短い第2カウンタによるイベントが連発したり、長期間発生しないのを抑制する。【解決手段】逓倍信号に基づいてカウントアップする複数のカウンタは、第1カウンタ(72)と第1カウンタよりも周期の短い第2カウンタ(74)を有する。逓倍信号のカウントアップ要因を補正する補正値を設定する手段(58)は、欠け歯部に基づく所定タイミングにおいて、第1カウンタのカウント値と基準値との差分を第1補正値として設定し、第2カウンタの一周期分のカウント数未満、且つ、第1補正値が設定された場合と第2カウンタのリセットタイミングが変わらない値を第2補正値として設定する。第1カウンタは、第1補正値により補正された逓倍信号に基づいてカウントアップし、第2カウンタは、第2補正値により補正された逓倍信号に基づいてカウントアップする。【選択図】図2
Bibliography:Application Number: JP20130171574