Invention Grant
- Patent Title: Method for controlling injection in a diesel engine exhaust aftertreatment system and diesel engine with exhaust aftertreatment system
- Patent Title (中): 柴油发动机尾气后处理系统和柴油发动机排气后处理系统的喷射控制方法
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Application No.: US11959553Application Date: 2007-12-19
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Publication No.: US07908846B2Publication Date: 2011-03-22
- Inventor: Chun Tai
- Applicant: Chun Tai
- Applicant Address: US NC Greensboro
- Assignee: Mack Trucks, Inc
- Current Assignee: Mack Trucks, Inc
- Current Assignee Address: US NC Greensboro
- Agency: WRB-IP LLP
- Main IPC: F01N3/00
- IPC: F01N3/00
Abstract:
A method for controlling injection of a substance in a diesel engine exhaust after treatment system includes generating a feedforward signal as a function of a desired output signal, the desired output signal corresponding to an output sought to be achieved through injection of the substance. Actual system output is measured and an actual output signal is generated corresponding to an output actually achieved through injection of the substance. The desired output signal and the actual output signal are compared and an error signal is generated corresponding to a difference between the desired output signal and the actual output signal. A control signal is generated as a function of the error signal and the feedforward signal for controlling an amount of the substance to inject, and the feedforward signal is adjusted by an adaptive factor, the adaptive factor being a function of the error signal. A diesel engine is also provided.
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