独自動車大手ダイムラー の高級車ブランド、メルセデス・ベンツが9速ATの開発に取り組んでいるもようだ。英『Autocar』誌(19日付、電子版)が同社のシニアエンジニア筋から得た情報として報じた。同消息筋によると、9速ATは大型エンジンと組み合わせる見通しで、燃費とCO2排出量の大幅改善が見込めるという。また、変速技術は9速が限界で、10速とする可能性は低いとの見解を示している。技術的な理由に加え、運転操作の面でもドライバーの負担が増す問題が生じるという。
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