DPF:溶損とアッシュの関係性

前回の投稿で強制再生時の燃焼温度とフィルター溶損の関係性について書きましたが、
今回はその辺りをもう少し詳しく書こうと思います。

DPFフィルターを結構な頻度で交換していると言う話をよく耳にしますが、
そもそもDPFフィルターは正しく扱えばそんなに頻繁に壊れる(溶損する)物ではありません。
(勿論衝撃により溶損する事もありますが・・・)
前回お話した通り、整備工場さん・ディーラーさんが強制再生時に「溶損させている」ケースも結構見受けられます。
その辺りの要因については

①普段の車両管理(適正なオイル交換・自動再生・手動再生)をキッチリ行っていない
②車検時等にインジェクター・EGR等のチェック・予防整備を怠る
③DPFが詰まってきた事への対応不足
④知識の乏しい整備工場さん・一部ディーラーさんの安易な強制再生

この辺りをキッチリしていれば溶損の確率はぐっと下がりますし、長く大事に使って頂く事ができます。
そして結果的に安価で済む事の方が多いです。

今までの投稿の中でも何度も書かせて頂きましたが、
カーボン詰まりはさほど気にする事はありません。
(というかカーボンは気にしても詰まります)
それがDPFのフィルターの役割なのですから。
DPFフィルターの本来の仕様はフィルターで微粒子環境汚染物質を集積する為にあり、一定量集積して詰まってきたものを自動再生・手動再生で燃焼させるという仕組み。
そこに車両管理不足等によりアッシュも一緒に堆積。
アッシュは強制再生をしても焼けない為どんどん堆積して、結果的にチェックランプ点灯。
つまりDPFフィルターをお金を掛けずに長く大事に使う為には、
全てはアッシュとの闘いなのです。

いかにアッシュを堆積しにくくするか
いかに堆積したアッシュを早い段階でリセット出来るか

DPFの寿命は全てここに集約していると言っても過言ではありません!

ではアッシュによる溶損を回避する為には、
①アッシュが堆積しにくくする為の「予防整備」をキッチリする
②自動再生・手動再生の正しい遂行
③DPFの状態を逐一肌で感じる事
 (知識のない方には非常に難しく聞こえますが、
  再生頻度・再生時間に違和感を覚えるといった事でも十分です)
④違和感があれば「正しい知識を持った整備工場に相談する」事
⑤定期的なDPF予防洗浄(=定期的なアッシュリセット)

本当に一番難しいのは④の「正しい知識をもった整備工場」かもしれませんが・・・

あっ!

ウチは正しい知識と技術を持ってる整備工場だ!

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