发明名称 |
Exhaust system using ash-compensating regeneration management |
摘要 |
An exhaust system for an engine having a throttle is disclosed. The exhaust system may include an exhaust passage connectable to the engine, a particulate filter disposed in the exhaust passage, a sensor configured to generate a signal indicative of a total pressure differential across the particulate filter caused by soot and ash accumulation, a load actuator configured to selectively adjust a load on the engine, and a control module electronically connected to the load actuator and the sensor. The control module may be configured to determine a compensated pressure differential indicative of an amount of the total pressure differential caused by soot accumulation, a soot load of the particulate filter based on the compensated pressure differential, cause the load actuator to initiate a first engine load increase based on the soot load, track a time elapsed since initiation of the first engine load increase, and cause the load actuator to initiate a subsequent engine load increase when the time elapsed is greater than an elapsed time limit and the soot load is greater than a target soot load. |
申请公布号 |
US9587574(B2) |
申请公布日期 |
2017.03.07 |
申请号 |
US201414555351 |
申请日期 |
2014.11.26 |
申请人 |
Electro-Motive Diesel, Inc. |
发明人 |
Biagini Douglas Michael;Nair Rajesh Narayanan |
分类号 |
F01N3/00;F01N3/02;F01N3/10;F01N3/20;F02D41/02 |
主分类号 |
F01N3/00 |
代理机构 |
Finnegan, Henderson, Farabow, Garrett & Dunner, LLP |
代理人 |
Finnegan, Henderson, Farabow, Garrett & Dunner, LLP |
主权项 |
1. An exhaust system for an engine having a throttle, comprising:
an exhaust passage connectable to the engine; a particulate filter disposed in the exhaust passage; a sensor configured to generate a signal indicative of a total pressure differential across the particulate filter caused by soot and ash accumulation; a load actuator configured to selectively adjust a load on the engine; and a control module electronically connected to the load actuator and the sensor, wherein the control module is configured to: determine a compensated pressure differential indicative of an amount of the total pressure differential caused by soot accumulation; determine a soot load of the particulate filter based on the compensated pressure differential; cause the load actuator to initiate a first engine load increase based on the soot load; track a time elapsed since initiation of the first engine load increase; and cause the load actuator to initiate a subsequent engine load increase when the time elapsed is greater than an elapsed time limit and the soot load is greater than a target soot load, wherein the control module is configured to determine the compensated pressure differential based on a total exhaust flow rate through the exhaust system, an average load factor since a previous particulate filter replacement, and an amount of time elapsed since a previous particulate filter replacement. |
地址 |
La Grange IL US |