公开(公告)号：US20150121851A1

公开(公告)日：2015-05-07

申请号：US14532391

申请日：2014-11-04

Applicant: Cummins Inc.

Inventor： Marten H. Dane ,  John C. Wall ,  Wayne A. Eckerle

IPC: F02D41/00 ,  F02M25/07

CPC classification number: F02D41/0077 ,  F02B29/0425 ,  F02B29/0437 ,  F02D21/08 ,  F02D41/005 ,  F02D41/0072 ,  F02M26/05 ,  F02M26/21 ,  F02M26/28 ,  F02M26/37 ,  F02M26/38 ,  F02M26/43 ,  F02M26/47 ,  F02M26/71 ,  Y02T10/47

Abstract: Systems, methods and techniques for exhaust gas recirculation are provided. The system includes controlling the mixing of exhaust flow from at least one cylinder of an engine with air in an air intake system prior to combustion in response to an EGR fraction deviation condition. The exhaust flow from the at least one cylinder is accumulated prior to mixing and distributed into the intake air system in a controlled manner to mitigate or prevent the EGR flow from deviating from an expected EGR fraction.

Abstract translation: 提供了排气再循环的系统，方法和技术。 该系统包括响应于EGR分数偏差条件，在燃烧之前控制来自发动机的至少一个气缸的排气流与进气系统中的空气的混合。 来自至少一个气缸的排气流在混合之前累积，并以受控的方式分配到进气系统中，以减轻或阻止EGR流偏离预期的EGR分数。

公开(公告)号：US20140230413A1

公开(公告)日：2014-08-21

申请号：US14263106

申请日：2014-04-28

Applicant: Cummins Inc.

Inventor： Aleksey Yezerets ,  Timothy R. Frazier ,  Marten H. Dane ,  Samuel C. Geckler ,  Govindarajan Kothandaraman

IPC: F02D41/14

CPC classification number: F02D41/1454 ,  F01N3/035 ,  F01N3/101 ,  F01N9/002 ,  F01N11/005 ,  F01N11/007 ,  F01N2550/04 ,  F01N2560/025 ,  F01N2900/0416 ,  F01N2900/1602 ,  F01N2900/1606 ,  F02D41/029 ,  F02D41/1408 ,  F02D41/1441 ,  F02D41/146 ,  F02D2200/0802 ,  F02D2200/0812 ,  Y02T10/22 ,  Y02T10/24 ,  Y02T10/47

Abstract: A system includes an internal combustion ignition engine with an exhaust gas flow, a particulate filter in the exhaust gas flow, a NOx reduction catalyst in the exhaust gas flow downstream of the particulate filter, a first oxygen sensor coupled to the exhaust gas flow downstream of the NOx reduction catalyst, and a second oxygen sensor coupled to the exhaust gas flow between the particulate filter and the NOx reduction catalyst. A controller includes an exhaust conditions module that interprets a first oxygen signal from the first oxygen sensor and a second oxygen signal from the second oxygen sensor and a combustion control module that commands a high engine-out air-fuel ratio when the first oxygen signal indicates a low oxygen content and commands a low engine-out air-fuel ratio when the first oxygen signal indicates a high oxygen content.

Abstract translation: 一种系统包括具有废气流的内燃点火发动机，排气流中的微粒过滤器，在颗粒过滤器下游的废气流中的NOx还原催化剂，耦合到排气流下游的废气流的第一氧传感器 NOx还原催化剂和与颗粒过滤器和NOx还原催化剂之间的废气流耦合的第二氧传感器。 控制器包括：排气条件模块，其解释来自第一氧传感器的第一氧信号和来自第二氧传感器的第二氧信号;以及燃烧控制模块，其在第一氧信号指示时命令高发动机输出空燃比 低氧含量，并且当第一氧信号表示高氧含量时，发出低的发动机空燃比。