- 专利标题: Multi-tier exhaust burner control for SCR catalyst pre-heating
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申请号: US17752183申请日: 2022-05-24
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公开(公告)号: US11821350B2公开(公告)日: 2023-11-21
- 发明人: Thomas M. Harris , James E. McCarthy, Jr.
- 申请人: Tenneco Automotive Operating Company Inc.
- 申请人地址: US IL Lake Forest
- 专利权人: Tenneco Automotive Operating Company Inc.
- 当前专利权人: Tenneco Automotive Operating Company Inc.
- 当前专利权人地址: US MI Northville
- 代理机构: Harness, Dickey & Pierce, P.L.C.
- 主分类号: F01N3/20
- IPC分类号: F01N3/20 ; F01N3/32
摘要:
An exhaust control system for a vehicle includes a temperature sensor positioned downstream of an exhaust burner and upstream of an SCR catalyst in an exhaust system. The temperature sensor is configured to generate a measurement signal indicative a temperature of exhaust flowing through the exhaust system at an outlet of a DPF positioned downstream of the exhaust burner. An exhaust control module is configured to turn the exhaust burner on to heat the exhaust, monitor the temperature of the exhaust based on the measurement signal, subsequent to turning the exhaust burner on, turn the exhaust burner off based on an upper threshold temperature of the exhaust, and, subsequent to turning the exhaust burner off, turn the exhaust burner on based on a lower threshold temperature of the exhaust. The lower threshold temperature is less than the upper threshold temperature.
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