| 发明名称 | System and method for sensing particulate matter | ||
| 摘要 | A computerized method includes receiving signals from a particulate matter sensor relating to an amount of particulates at a point in time within a time period in a diesel engine exhaust stream, calculating one or more running statistical parameters relating to a particle mass in the diesel engine exhaust stream, determining an upper control limit for the amount of particulates, receiving a threshold for an allowable amount of particulates in the diesel engine exhaust stream, comparing the threshold to one or more of (a) a current instantaneous particulate reading from the particulate matter sensor and (b) the upper control limit for the amount of particulates, and generating an output signal when one or more of the current instantaneous particulate reading and the upper control limit for the amount of particulates are above the threshold. | ||
| 申请公布号 | US9145815(B2) | 申请公布日期 | 2015.09.29 |
| 申请号 | US201012944263 | 申请日期 | 2010.11.11 |
| 申请人 | Honeywell International Inc. | 发明人 | Krafthefer Brian C.;O'Brien, Jr. Gary Richard;Hampson Gregory J. |
| 分类号 | F01N3/00;F01N11/00 | 主分类号 | F01N3/00 |
| 代理机构 | Schwegman Lundberg & Woessner, P.A. | 代理人 | Schwegman Lundberg & Woessner, P.A. |
| 主权项 | 1. A method comprising: receiving signals from a particulate matter sensor relating to an amount of particulates at a point in time within a time period in a diesel engine exhaust stream; calculating one or more running statistical parameters, over a time interval, relating to a particle mass in the diesel engine exhaust stream; determining, using a distribution of the amount of particulates during the time interval, an upper control limit for the amount of particulates; receiving a threshold for an allowable amount of particulates in the diesel engine exhaust stream; comparing the threshold to one or more of (a) a current instantaneous particulate reading from the particulate matter sensor and (b) the upper control limit for the amount of particulates; and in response to the comparing, detecting an engine failure or an after-treatment system failure when one or more of the current instantaneous particulate reading and the upper control limit for the amount of particulates are above the threshold; wherein the upper control limit for the amount of particulates is defined by one or more characteristics of the particulate matter sensor. | ||
| 地址 | Morristown NJ US | ||