公开(公告)号：US10030593B2

公开(公告)日：2018-07-24

申请号：US14290052

申请日：2014-05-29

Applicant: Cummins Inc.

Inventor： Karthik Kappanganthu ,  David Stroh ,  Carlos A. Lana ,  J. Stephen Wills

IPC: F02D41/00 ,  F02D41/14 ,  G01M15/00

Abstract: A system and method of detecting fueling imbalance(s) in an internal combustion engine is provided. The method includes receiving data regarding an oxygen content of engine exhaust for the engine operating at a cycle rate. Frequency component analysis is performed comprising a filtering operation on the received oxygen content data. The filtering is done at the cycle rate of the engine or harmonics thereof to obtain filtered oxygen content data. Then, the method/system determines at least one of: 1) one or more angles of the engine at which the filtered oxygen content data exhibits a first amplitude value characteristic relative to amplitude values at other angles; and 2) a shape of the filtered oxygen content data obtained by sampling at pre-defined engine angles. The method/system then identifies a cylinder experiencing a fueling imbalance responsive to the determined at least one of one or more angle(s) and shape of the data.

公开(公告)号：US20150345416A1

公开(公告)日：2015-12-03

申请号：US14290052

申请日：2014-05-29

Applicant: Cummins Inc.

Inventor： Karthik Kappanganthu ,  David Stroh ,  Carlos A. Lana ,  J. Stephen Wills

IPC: F02D41/00 ,  G01M15/00 ,  F02D41/14

CPC classification number: F02D41/0085 ,  F02D41/0087 ,  F02D41/009 ,  F02D41/1439 ,  F02D41/1454 ,  G01M15/00

Abstract: A system and method of detecting fueling imbalance(s) in an internal combustion engine is provided. The method includes receiving data regarding an oxygen content of engine exhaust for the engine operating at a cycle rate. Frequency component analysis is performed comprising a filtering operation on the received oxygen content data. The filtering is done at the cycle rate of the engine or harmonics thereof to obtain filtered oxygen content data. Then, the method/system determines at least one of: 1) one or more angles of the engine at which the filtered oxygen content data exhibits a first amplitude value characteristic relative to amplitude values at other angles; and 2) a shape of the filtered oxygen content data obtained by sampling at pre-defined engine angles. The method/system then identifies a cylinder experiencing a fueling imbalance responsive to the determined at least one of one or more angle(s) and shape of the data.

Abstract translation: 提供一种检测内燃机中的加油不平衡的系统和方法。 该方法包括接收关于用于以循环速率操作的发动机的发动机排气的氧含量的数据。 执行频率分量分析，其包括对接收的氧含量数据的滤波操作。 以发动机的循环速率或谐波进行过滤以获得过滤的氧含量数据。 然后，方法/系统确定以下至少一个：1）发动机的一个或多个角度，其中经过滤氧的含氧量数据相对于其他角度的振幅值呈现第一振幅值特性; 和2）通过以预定的发动机角度取样获得的经过滤氧含量数据的形状。 方法/系统然后响应于所确定的数据的一个或多个角度和形状中的至少一个来识别遇到加油不平衡的气缸。