公开(公告)号：US20140278010A1

公开(公告)日：2014-09-18

申请号：US13832154

申请日：2013-03-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Wajdi B. Hamama ,  Craig M. Sawdon ,  Kevin M. Luchansky ,  James R. Reeder, JR. ,  Frank Garthoff ,  Christian Mueller ,  Jessica A. Carroll

IPC: F02D35/02

CPC classification number: F02D35/027 ,  F02D41/0087 ,  F02D41/2451 ,  F02D2200/0611 ,  G01L23/22

Abstract: A method includes: generating an indicator of present operating conditions of an engine; determining a first amount of noise based on vibration measured during a first plurality of combustion events of a cylinder; storing the first amount of noise and a first value of the indicator in a mapping based on a first engine speed and a first engine load; determining the first value of the indicator from the mapping based on a second engine speed and a second engine load; generating a trigger signal when the first value is different than a second value of the indicator; and, when the trigger signal is generated: determining a second amount of noise based on vibration measured during a second plurality of combustion events of the cylinder; and replacing the first amount of noise and the first value in the mapping with the second amount of noise and the second value.

Abstract translation: 一种方法包括：产生发动机的当前操作条件的指示器; 基于在气缸的第一多个燃烧事件期间测量的振动来确定第一噪声量; 基于第一发动机速度和第一发动机负载将映射中的第一噪声量和第一值存储在映射中; 基于第二发动机速度和第二发动机负载从所述映射确定所述指示器的第一值; 当所述第一值不同于所述指示器的第二值时产生触发信号; 并且当产生触发信号时：基于在所述气缸的第二多个燃烧事件期间测量的振动来确定第二噪声量; 以及用所述第二噪声量和所述第二值替换所述映射中的所述第一噪声量和所述第一值。