インジェクタ開放イベントに基づく熱的に最適化されたピーク・ホールド動作を有する車両用選択的接触還元のための還元剤デリバリユニット

Title:

インジェクタ開放イベントに基づく熱的に最適化されたピーク・ホールド動作を有する車両用選択的接触還元のための還元剤デリバリユニット

Document Type and Number:

Japanese Patent JP5859067

Kind Code:

B2

Abstract:

A trigger circuit is provided for a peak and hold driver circuit for a reductant delivery unit (RDU) having a solenoid-operated injector for selective catalytic reduction (SCR) after-treatment for vehicles. The peak and hold driver circuit is constructed and arranged to actuate the injector in a rise-to-peak current phase followed by a low current hold phase. The trigger circuit includes an injector open detection circuit constructed and arranged, based on a detected opening event of the injector, to trigger a transition from the rise-to-peak phase to the subsequent hold phase of the injector.

Inventors:

Douglas Edward Cosby
Willem Nikolaas Van Wurren

Application Number:

JP2014125547A

Publication Date:

February 10, 2016

Filing Date:

June 18, 2014

Export Citation:

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