公开(公告)号：US10914201B2

公开(公告)日：2021-02-09

申请号：US16060475

申请日：2015-12-18

Applicant: CUMMINS INC.

Inventor： Prashant P. Patel ,  Christopher R. Nelson ,  Prashaanth Ravindran

IPC: F01K23/06 ,  F01K23/10 ,  F01P7/16 ,  F02B29/04 ,  F01P3/00 ,  F01P7/14

Abstract: An example system includes an engine and an exhaust passage fluidly coupled to the engine. A waste heat recovery system includes a boiler operatively coupled to the exhaust passage, and a condenser fluidly coupled to the boiler. An integrated cooling system includes an engine cooling circuit, a waste heat recovery cooling circuit, a waste heat recovery bypass valve, and a controller. The waste heat recovery bypass valve is operatively coupled to the exhaust passage upstream of the boiler, and is selectively controllable so as to direct at least a portion of the exhaust gas through an exhaust bypass passage so as to bypass the boiler. The controller is in operative communication with the waste heat recovery bypass valve. The controller is structured to determine a cooling demand of the engine, and to control a valve position of the waste heat recovery bypass valve based on the cooling demand.

公开(公告)号：US20190186415A1

公开(公告)日：2019-06-20

申请号：US15841952

申请日：2017-12-14

Applicant: Cummins Inc.

Inventor： Timothy C. Ernst ,  Christopher R. Nelson

IPC: F02G5/04 ,  F02G1/047 ,  F02M26/33 ,  F02M26/24

Abstract: Systems and methods are disclosed to recover waste heat from an engine fluid with a heat exchanger subsystem that includes a heat exchanger. The heat exchanger subsystem is thermally coupled to a working fluid and the engine fluid, so the waste heat from the engine fluid is transferred to the working fluid. The engine fluid is bypassed from the heat exchanger in response to a heat exchanger bypass condition.

公开(公告)号：US11920533B2

公开(公告)日：2024-03-05

申请号：US17927573

申请日：2020-05-27

Applicant: Cummins Inc. ,  Tula Technology, Inc.

Inventor： Jennifer Kay Light-Holets ,  J. Steven Kolhouse ,  Christopher R. Nelson ,  Anant Puri ,  Xiaobo Song ,  Avra Brahma

IPC: F01N3/20 ,  F02D41/00 ,  F02D41/02 ,  F02D41/38 ,  F02M27/04

CPC classification number: F02D41/024 ,  F01N3/202 ,  F01N3/2026 ,  F01N3/2033 ,  F01N3/2066 ,  F02D41/0002 ,  F02D41/005 ,  F02D41/0087 ,  F02D41/38 ,  F02M27/04 ,  F02D2041/389 ,  F02D2200/0804 ,  F02D2200/50

Abstract: A system includes an aftertreatment system heater of an exhaust aftertreatment system coupled to an engine A controller coupled to the aftertreatment system heater is configured to determine a condition of an exhaust gas from an engine and compare the condition to a predefined threshold. If the condition of the exhaust gas does not meet the predefined threshold, the controller is configured to determine whether an engine operating condition is met for activating a cylinder deactivation operating mode for the engine. If the engine operating condition is met, the controller is configured to operate the engine in the cylinder deactivation operating mode by deactivating a cylinder of a plurality of cylinders. If the engine operating condition is not met, the controller is configured to activate the aftertreatment system heater to heat the exhaust gas.

公开(公告)号：US10900383B2

公开(公告)日：2021-01-26

申请号：US16483949

申请日：2017-02-10

Applicant: CUMMINS INC.

Inventor： Timothy C. Ernst ,  Christopher R. Nelson

IPC: F01K23/06 ,  F01K23/10 ,  F01K13/02 ,  F01K25/08 ,  F01N5/02 ,  F02G5/04

Abstract: A waste heat recovery system includes a first heat exchanger, a second heat exchanger, and an expander. The first heat exchanger receives working fluid from a first portion of a first loop and provides the working fluid to a second portion of the first loop. The second heat exchanger receives the working fluid from a first portion of a second loop and provides the working fluid to a second portion of the second loop. The expander provides the working fluid to a first portion of a common line. The expander includes a stator. The stator includes a first inlet and a second inlet. The common line provides the working fluid to both the first loop and the second loop upstream of the first portion of the first loop and upstream of the first portion of the second loop.

公开(公告)号：US09140209B2

公开(公告)日：2015-09-22

申请号：US13679885

申请日：2012-11-16

Applicant: CUMMINS INC. ,  PACCAR, INC.

Inventor： Timothy C. Ernst ,  Christopher R. Nelson

IPC: F02G3/00 ,  F02G5/04 ,  F02M25/07 ,  F01N5/02

CPC classification number: F02G5/04 ,  F01N5/02 ,  F02M26/00 ,  Y02T10/121 ,  Y02T10/166

Abstract: A waste heat recovery (WHR) system connects a working fluid to fluid passages formed in an engine block and/or a cylinder head of an internal combustion engine, forming an engine heat exchanger. The fluid passages are formed near high temperature areas of the engine, subjecting the working fluid to sufficient heat energy to vaporize the working fluid while the working fluid advantageously cools the engine block and/or cylinder head, improving fuel efficiency. The location of the engine heat exchanger downstream from an EGR boiler and upstream from an exhaust heat exchanger provides an optimal position of the engine heat exchanger with respect to the thermodynamic cycle of the WHR system, giving priority to cooling of EGR gas. The configuration of valves in the WHR system provides the ability to select a plurality of parallel flow paths for optimal operation.

Abstract translation: 废热回收（WHR）系统将工作流体连接到形成在内燃机的发动机缸体和/或气缸盖中的流体通道，形成发动机热交换器。 流体通道在发动机的高温区域附近形成，使工作流体具有足够的热能以蒸发工作流体，同时工作流体有利地冷却发动机缸体和/或气缸盖，从而提高燃料效率。 发动机热交换器在EGR锅炉下游和排气热交换器上游的位置提供发动机热交换器相对于WHR系统的热力循环的最佳位置，优先考虑EGR气体的冷却。 WHR系统中的阀的配置提供了选择多个并行流动路径以获得最佳操作的能力。

公开(公告)号：US08635871B2

公开(公告)日：2014-01-28

申请号：US13756263

申请日：2013-01-31

Applicant: Cummins Inc.

Inventor： Timothy C. Ernst ,  Christopher R. Nelson

IPC: F01K23/10 ,  F02G3/00 ,  F01N3/02 ,  F01N5/02

CPC classification number: F02G5/02 ,  F01K23/065 ,  F01K23/10

Abstract: A waste heat recovery system for use with an engine. The waste heat recovery system receives heat input from both an exhaust gas recovery system and exhaust gas streams. The system includes a first loop and a second loop. The first loop is configured to receive heat from both the exhaust gas recovery system and the exhaust system as necessary. The second loop receives heat from the first loop and the exhaust gas recovery system. The second loop converts the heat energy into electrical energy through the use of a turbine.

Abstract translation: 用于发动机的废热回收系统。 废热回收系统接收来自废气回收系统和废气流的热量输入。 该系统包括第一回路和第二回路。 第一回路被配置为根据需要从废气回收系统和排气系统接收热量。 第二回路从第一回路和废气回收系统接收热量。 第二回路通过使用涡轮将热能转换成电能。