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JPH0771233A Expired / Lapsed JP ⏱️ 0.0 years remaining

How to test the function of the exhaust gas catalyst

Assignee: Dr Ing HCF Porsche AG
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Filing: 1994-02-01
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Granted: —
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Expires: 2014-02-01
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Abstract

Abstract Translated from Japanese (57)【要約】 【目的】 触媒の老化状態および転換率を迅速かつ確実 に検査することができる方法を提供する。 【構成】 内燃機関1の排気管列6に装着された排気ガ ス触媒7の転換率を検査するために、先ず最初に、或る 時間の間、第1の運転状態は一定の限界条件を維持する 必要がある。これが満たされると、第2の時間におい て、例えば惰性運転中、この状態に一致しない排気ガス パルスが発生させられ、触媒の下流に設けた温度センサ の反応が評価される。排気ガスパルスのために、排気ガ ス温度の変化が所定の限界値内にないと、許容されない 低い転換率を示す信号が発せられる。 (57) [Summary] [Object] To provide a method capable of rapidly and reliably inspecting the aging state and conversion rate of a catalyst. In order to check the conversion rate of the exhaust gas catalyst 7 mounted on the exhaust pipe row 6 of the internal combustion engine 1, first, for a certain period of time, the first operating state maintains a certain limit condition. There is a need to. If this is fulfilled, during a second time, for example during coasting, an exhaust gas pulse which does not correspond to this state is generated and the reaction of the temperature sensor downstream of the catalyst is evaluated. Due to the exhaust gas pulse, if the change in exhaust gas temperature is not within predetermined limits, a signal is emitted indicating an unacceptably low conversion rate.

Inventors

  • 👤 Stephan Pelters
  • 👤 シユテファン・ペルタース
  • 👤 Dietmar Schwarzenthal
  • 👤 ディートマール・シユヴァルツェンタール

Bibliographic Details

Application Number —
Jurisdiction JP
Data Source google_patents
Last Synchronized 2026-11-07 14:04
CPC Classifications
F; F01; F01N; F01N11/00; F01N11/002; F01N2550/00; F01N2550/02; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40

Claims Analysis

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References Cited (Backward Citations)

JPS5566317A Cited
JPS55162613U Cited
JPS58224745A Cited
JPS59224745A Cited

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