公开(公告)号：US10450970B2

公开(公告)日：2019-10-22

申请号：US15568425

申请日：2016-04-22

申请人： WESTPORT POWER INC.

发明人： Jian Huang ,  Kevin Lee

IPC分类号： F02D41/00 ,  F02D35/02 ,  F02D41/22 ,  F02D19/10 ,  F02D19/06 ,  G01M15/11 ,  F02D19/08 ,  F02D41/14 ,  F02D41/40 ,  F02D43/04 ,  F02P5/152

摘要： Premixed engines including dual fuel engines can experience abnormal combustion characteristics including misfire, pre-ignition and knock. A method for detecting and mitigating abnormal combustion in an engine comprises sensing frequency components of an acoustic signal associated with a combustion chamber during a combustion cycle, the frequency components representative of at least one of a normal and an abnormal combustion characteristic; determining an in-cylinder pressure signal as a function of the acoustic signal; calculating as functions of the in-cylinder pressure signal at least one of a knock index, a gross indicated mean effective pressure and a start of combustion timing; detecting the abnormal combustion characteristic is at least one of (a) a misfire event when the gross indicated mean effective pressure is less than a predetermined mean effective pressure value; (b) a pre-ignition event when the start of combustion timing is advanced of a start of ignition timing; and (c) an engine knock event when the knock index is greater than a predetermined knock value; and performing a mitigation strategy for the detected abnormal combustion characteristic.