公开(公告)号：WO2014110505A2

公开(公告)日：2014-07-17

申请号：PCT/US2014/011294

申请日：2014-01-13

Applicant: CUMMINS, INC.

Inventor： KAPPAGANTHU, Karthik ,  STROH, David

IPC: G01M15/11

CPC classification number: G01M15/11 ,  G06F17/10

Abstract: An engine cylinder misfire detection system is provided that detects changes in exhaust manifold pressure (EMP) fluctuations, compares the EMP fluctuations with diagnostic thresholds determined with other engine characteristic information obtained from engine sensor data, and determines whether a cylinder misfire has occurred. A method of monitoring and detecting EMP fluctuations in combination with one or more sensed engine characteristics is disclosed to determine an engine cylinder misfire in a cycle of an internal combustion engine having at least one cylinder. The actuation approaches of the present invention include one or more processes for a cylinder of an engine associated with a determination of various load variables including fresh air flow, engine type, engine data inputs, and analytical determinants.

Abstract translation: 提供了一种检测排气歧管压力（EMP）波动变化的发动机气缸失火检测系统，将EMP波动与根据从发动机传感器数据获得的其他发动机特性信息确定的诊断阈值进行比较，并确定是否发生气缸失火。 公开了一种监测和检测EMP波动的方法，结合一个或多个感测到的发动机特性来确定在具有至少一个气缸的内燃机的循环中的发动机气缸失火。 本发明的致动方法包括与确定包括新鲜空气流，发动机类型，发动机数据输入和分析决定因素在内的各种负载变量相关联的发动机气缸的一个或多个过程。

公开(公告)号：WO2016094671A1

公开(公告)日：2016-06-16

申请号：PCT/US2015/065019

申请日：2015-12-10

Applicant: CUMMINS INC.

Inventor： STROH, David, J. ,  KOTHANDARAM, Govindarajan ,  LANA, Carlos, Alcides ,  KAPPAGANTHU, Karthik

IPC: F02B47/08

CPC classification number: F02P5/1516 ,  F02P9/002 ,  Y02T10/46

Abstract: Systems and methods are disclosed for adjusting the spark timing of an internal combustion engine. According to at least one aspect of the present disclosure, the system includes an exhaust gas recirculation (EGR) system for recirculating exhaust gas flow from at least one primary EGR cylinder of an engine into an intake system prior to combustion. According to at least one other aspect of the present disclosure, the method includes estimating a dynamic EGR fraction of exhaust gas directed into the intake system via the EGR system, estimating a steady-state EGR fraction of exhaust gas directed into the intake system at the changed mass air flow rate, computing a difference between the dynamic fraction and steady-state fraction to determine a change in EGR fraction, and applying a gain factor to the change in EGR fraction to determine a desired spark timing adjustment.

Abstract translation: 公开了用于调节内燃机的火花正时的系统和方法。 根据本公开的至少一个方面，该系统包括废气再循环（EGR）系统，用于在燃烧之前使排气流从发动机的至少一个主EGR气缸再循环到进气系统中。 根据本公开的至少另一方面，所述方法包括：经由所述EGR系统估计引导到所述进气系统中的排气的动态EGR分数，估计在所述进气系统中引导的废气的稳态EGR分数 改变质量空气流量，计算动态分数和稳态分数之间的差以确定EGR分数的变化，以及将增益因子应用于EGR分数的变化以确定期望的火花正时调整。

公开(公告)号：WO2015066671A2

公开(公告)日：2015-05-07

申请号：PCT/US2014/063802

申请日：2014-11-04

Applicant: CUMMINS INC.

Inventor： LANA, Carlos, Alcides ,  STROH, David, J. ,  GECKLER, Samuel, C. ,  DANE, Marten, H. ,  PERFETTO, Anthony, Kyle ,  KAPPAGANTHU, Karthik ,  KOTHANDARAMAN, Govindarajan

IPC: F02C3/067

CPC classification number: F02D41/0077 ,  F02B37/18 ,  F02B37/24 ,  F02D13/02 ,  F02D13/0261 ,  F02D41/0007 ,  F02D41/0072 ,  F02D41/008 ,  F02D2021/083 ,  F02D2041/001 ,  F02M26/05 ,  F02M26/06 ,  F02M26/13 ,  F02M26/37 ,  F02M26/43 ,  F02P5/1512 ,  F02P5/1516 ,  Y02T10/144 ,  Y02T10/18 ,  Y02T10/46 ,  Y02T10/47

Abstract: Systems, apparatus, and methods are disclosed that include a divided exhaust engine with at least one primary EGR cylinder and a plurality of non-primary EGR cylinders. The systems, apparatus and methods control the amount of recirculated exhaust gas in a charge flow in response to EGR fraction deviation conditions.

Abstract translation: 公开了包括具有至少一个主EGR气缸和多个非主EGR气缸的分开的排气发动机的系统，设备和方法。 该系统，设备和方法响应于EGR分数偏差条件来控制充电流中的再循环排气量。