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公开(公告)号:US5795992A
公开(公告)日:1998-08-18
申请号:US765365
申请日:1997-02-10
申请人: Toshio Tanahashi , Masakatsu Sanada , Hiroyuki Domyo , Hiroshi Hirayama , Kazuaki Sobue , Tsuneo Higashi , Koji Yokota , Hideo Sobukawa , Tadashi Suzuki , Shinichi Matsunaga
发明人: Toshio Tanahashi , Masakatsu Sanada , Hiroyuki Domyo , Hiroshi Hirayama , Kazuaki Sobue , Tsuneo Higashi , Koji Yokota , Hideo Sobukawa , Tadashi Suzuki , Shinichi Matsunaga
CPC分类号: F01N11/002 , F02D41/1446 , F02D41/1495 , F01N2550/02 , F01N2550/20 , Y02T10/47
摘要: An internal combustion engine in which a three-way catalyst (12) for purification of the exhaust gas is arranged in the exhaust passage, wherein the relationship between the magnitude of the stress causing deterioration of the three-way catalyst (12), for example the catalytic bed temperature, and the rate of deterioration of the performance of the catalyst is found. A durability test is performed by raising the catalytic bed temperature higher than that of the vehicle under market driving. The length of the durability test at this time is determined from the relationship between the catalytic bed temperature and the rate of deterioration of the performance of the catalyst so as to give the same degree of deterioration of the performance of the catalyst as with market driving. The length of the durability test required for giving the same degree of deterioration of the performance of the catalyst is much shorter than the market driving time.
摘要翻译: PCT No.PCT / JP96 / 01318 Sec。 371日期1997年2月10日 102(e)日期1997年2月10日PCT提交1996年5月17日PCT公布。 WO96 / 36863 PCT出版物 日期:1996年11月21日在排气通路内配置有用于净化废气的三元催化剂(12)的内燃机,其中,三元催化剂的导致劣化的应力的大小 12),例如催化床温度和催化剂性能劣化的速率。 在市场驾驶下,通过提高催化床温度高于车辆的耐久性试验。 此时的耐久性试验的长度根据催化床温度与催化剂性能劣化的关系来确定,从而与催化剂的性能相同程度的劣化与市场驾驶相同。 给出相同程度的催化剂性能劣化所需的耐久性试验的长度比市场行驶时间短得多。
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公开(公告)号:US5722238A
公开(公告)日:1998-03-03
申请号:US734774
申请日:1996-10-22
申请人: Toshio Tanahashi , Masakatsu Sanada , Koji Yokota , Shinichi Matsunaga , Hideo Sobukawa , Ichiro Konomi , Tadashi Suzuki
发明人: Toshio Tanahashi , Masakatsu Sanada , Koji Yokota , Shinichi Matsunaga , Hideo Sobukawa , Ichiro Konomi , Tadashi Suzuki
CPC分类号: F01N11/002 , F01N11/00 , F01N11/007 , F01N2550/02 , Y02T10/47
摘要: A device for evaluating catalyst performance deterioration includes an air-fuel ratio sensor and a temperature sensor. The degree of catalyst performance deterioration per unit time is calculated based on the concentration of oxygen in the exhaust gas and the temperature of the catalyst. The deterioration of the catalyst is evaluated on the basis of the accumulated value of the degree of catalyst performance deterioration per unit time.
摘要翻译: 用于评价催化剂性能劣化的装置包括空燃比传感器和温度传感器。 基于废气中的氧浓度和催化剂的温度计算每单位时间的催化剂性能劣化程度。 基于每单位时间的催化剂性能劣化程度的累积值来评价催化剂的劣化。
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