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公开(公告)号:US08925300B2
公开(公告)日:2015-01-06
申请号:US13716639
申请日:2012-12-17
申请人: James J Daley , Robert J Jerger , Wei-Jun Yang , Jeffrey P Wuttke , Michael G Zammit , Andrew Brocker
发明人: James J Daley , Robert J Jerger , Wei-Jun Yang , Jeffrey P Wuttke , Michael G Zammit , Andrew Brocker
IPC分类号: F01N11/00
CPC分类号: F01N11/007 , F01N9/007 , F01N11/00 , F01N2550/02 , F01N2560/025 , F01N2900/1624 , Y02T10/47
摘要: A catalyst degradation detection method for use with a zero ceria catalyst. The method uses techniques to measure transient responses to engine control events of upstream and downstream sensors to determine catalyst degradation and performance. By measuring transient behavior, the method can determine catalyst degradation and performance based on the limited oxygen storage of precious metal catalysts that do not include added ceria or other materials with high oxygen capture rates.
摘要翻译: 一种与零二氧化铈催化剂一起使用的催化剂降解检测方法。 该方法使用技术来测量对上游和下游传感器的发动机控制事件的瞬态响应,以确定催化剂的劣化和性能。 通过测量瞬态行为,该方法可以基于贵金属催化剂的有限氧储存来确定催化剂降解和性能,所述催化剂不包括添加的二氧化铈或具有高氧捕获速率的其它材料。
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公开(公告)号:US09631537B2
公开(公告)日:2017-04-25
申请号:US14547194
申请日:2014-11-19
申请人: Robert J Jerger , James J Daley , Joseph M Dekar , Andrew Brocker , Wei-Jun Yang , Xuefei Chen , Brett Schubring , Lydell S Powell
发明人: Robert J Jerger , James J Daley , Joseph M Dekar , Andrew Brocker , Wei-Jun Yang , Xuefei Chen , Brett Schubring , Lydell S Powell
CPC分类号: F01N3/2066 , B01D53/9454 , B01D53/9495 , B01D2255/1021 , B01D2255/1023 , B01D2255/1025 , B01D2255/2065 , B01D2255/2073 , B01D2255/20738 , B01D2255/20753 , F01N3/0842 , F01N3/101 , F01N3/103 , F01N3/2006 , F01N3/2892 , F01N9/00 , F01N13/08 , F01N2470/24 , F01N2900/1626 , Y02A50/2324 , Y02A50/2325 , Y02T10/22 , Y02T10/24 , Y02T10/26 , Y02T10/47
摘要: An exhaust gas flow concentration system for a catalyst includes an inlet that receives a flow of exhaust gas from an exhaust pipe of an exhaust system, a stationary tube in communication with the inlet and disposed upstream from the catalyst, and an extension tube in communication with the stationary tube and disposed upstream from the catalyst, where the extension tube includes a cross-sectional area less than a cross-sectional area of the catalyst. A displacement device is coupled to the extension tube and is configured to (i) displace the extension tube relative to the stationary tube downstream towards the catalyst as a temperature in the exhaust system decreases away from a light-off temperature of the catalyst and (ii) retract the extension tube relative to the stationary tube upstream away from the catalyst when the temperature in the exhaust system reaches the light-off temperature of the catalyst.
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