公开(公告)号：US20180355765A1

公开(公告)日：2018-12-13

申请号：US16060475

申请日：2015-12-18

Applicant: CUMMINS INC.

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

IPC: F01K23/06 ,  F02B29/04 ,  F01P7/16 ,  F01K23/10

CPC classification number: F01K23/065 ,  F01K23/10 ,  F01K23/101 ,  F01P7/16 ,  F01P2003/001 ,  F01P2007/146 ,  F01P2025/30 ,  F02B29/04

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：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：US10724471B2

公开(公告)日：2020-07-28

申请号：US16060512

申请日：2015-12-21

Applicant: CUMMINS INC.

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

IPC: F02G5/04 ,  F02B41/10 ,  F02B63/04 ,  F02C6/12

Abstract: An engine waste heat recovery (WHR) system includes a turbocharger WHR portion, an exhaust WHR portion, an expander in the exhaust WHR portion, a condenser, valves, and a controller. The expander receives a working fluid in a superheated form and converts thermal energy in the working fluid into mechanical energy or electrical energy. The condenser condenses the working fluid for recirculation through the engine WHR system. The recuperator is fluidly coupled between the expander and the condenser to allow the working fluid to flow from the expander to the condenser. The recuperator transfers thermal energy to a flow of the working fluid from the turbocharger WHR portion. Each valve is fluidly coupled to one of the turbocharger WHR portion and the exhaust WHR portion. The controller is electrically coupled to the valves, and the controller selectively controls the valves to selectively circulate the working fluid through the engine WHR system.

公开(公告)号：US20190003419A1

公开(公告)日：2019-01-03

申请号：US16060512

申请日：2015-12-21

Applicant: CUMMINS INC.

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

IPC: F02G5/04 ,  F02B63/04 ,  F02B41/10 ,  F02C6/12

CPC classification number: F02G5/04 ,  F02B41/10 ,  F02B63/044 ,  F02C6/12 ,  F02G2260/00 ,  Y02T10/166

Abstract: An engine waste heat recovery (WHR) system includes a turbocharger WHR portion, an exhaust WHR portion, an expander in the exhaust WHR portion, a condenser, valves, and a controller. The expander receives a working fluid in a superheated form and converts thermal energy in the working fluid into mechanical energy or electrical energy. The condenser condenses the working fluid for recirculation through the engine WHR system. The recuperator is fluidly coupled between the expander and the condenser to allow the working fluid to flow from the expander to the condenser. The recuperator transfers thermal energy to a flow of the working fluid from the turbocharger WHR portion. Each valve is fluidly coupled to one of the turbocharger WHR portion and the exhaust WHR portion. The controller is electrically coupled to the valves, and the controller selectively controls the valves to selectively circulate the working fluid through the engine WHR system.