Timothy Craig Ernst

US Patent:

7866157, Jan 11, 2011

Filed:

May 12, 2008

Appl. No.:

12/152088

Inventors:

Timothy C. Ernst - Columbus IN, US
Christopher R. Nelson - Columbus IN, US

Assignee:

Cummins Inc. - Columbus IN

International Classification:

F02G 3/00
F01K 23/10
F01K 13/00
F01K 25/00

US Classification:

60618, 60645, 60671, 60615, 60616

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.

US Patent:

7958873, Jun 14, 2011

Filed:

May 12, 2008

Appl. No.:

12/152089

Inventors:

Timothy C Ernst - Columbus IN, US
Christopher R Nelson - Columbus IN, US

Assignee:

Cummins Inc. - Columbus IN

International Classification:

F02B 47/08
F02B 33/44
F02M 25/07

US Classification:

12356812, 606052

Abstract:

A system for reducing the temperature of waste heat from a waste heat source of a vehicle engine, including an open loop Brayton cycle having a cooler, a compressor, a turbine, and a shaft coupling the compressor to the turbine. Waste heat and compressed air from the compressor flow through the cooler, thereby transferring heat from the waste heat to the compressed air and lowering the temperature of the waste heat. The heated and compressed air is expanded across the turbine, to cause rotation of the shaft, thereby powering rotation of the compressor. Excess power beyond that necessary to drive the compressor may be drawn off through a generator which has its rotor mounted on the same shaft as the compressor and turbine.

US Patent:

7997076, Aug 16, 2011

Filed:

Mar 31, 2008

Appl. No.:

12/058810

Inventors:

Timothy C. Ernst - Columbus IN, US

Assignee:

Cummins, Inc. - Columbus IN

International Classification:

F02G 3/00
F02G 1/00
F01K 13/00
F01K 7/34
F01K 9/00
F01K 17/00
F02C 1/00

US Classification:

60616, 60645, 60653, 60661, 60677, 60772, 60 39182, 60 3952

Abstract:

A system for converting heat from an engine into work includes a boiler coupled to a heat source for transferring heat to a working fluid, a turbine that transforms the heat into work, a condenser that transforms the working fluid into liquid, a recuperator with one flow path that routes working fluid from the turbine to the condenser, and another flow path that routes liquid working fluid from the condenser to the boiler, the recuperator being configured to transfer heat to the liquid working fluid, and a bypass valve in parallel with the second flow path. The bypass valve is movable between a closed position, permitting flow through the second flow path and an opened position, under high engine load conditions, bypassing the second flow path.

US Patent:

8407998, Apr 2, 2013

Filed:

Dec 1, 2010

Appl. No.:

12/958101

Inventors:

Timothy C. Ernst - Columbus IN, US
Christopher R. Nelson - Columbus IN, US

Assignee:

Cummins Inc. - Columbus IN

International Classification:

F02G 3/00
F01K 23/10
F01K 25/08
F01K 25/00

US Classification:

60616, 60618, 60651, 60671

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.

US Patent:

8544274, Oct 1, 2013

Filed:

Jul 23, 2009

Appl. No.:

12/508190

Inventors:

Timothy C Ernst - Columbus IN, US

Assignee:

Cummins Intellectual Properties, Inc. - Minneapolis MN

International Classification:

F01K 25/08
F01K 13/00

US Classification:

60651, 60653, 60671, 60676, 60677

Abstract:

A thermodynamic system for waste heat recovery, using an organic rankine cycle is provided which employs a single organic heat transferring fluid to recover heat energy from two waste heat streams having differing waste heat temperatures. Separate high and low temperature boilers provide high and low pressure vapor streams that are routed into an integrated turbine assembly having dual turbines mounted on a common shaft. Each turbine is appropriately sized for the pressure ratio of each stream.

US Patent:

8627663, Jan 14, 2014

Filed:

Sep 2, 2009

Appl. No.:

12/552725

Inventors:

Timothy C. Ernst - Columbus IN, US
Christopher R. Nelson - Columbus IN, US
James A. Zigan - Versailles IN, US

Assignee:

Cummins Intellectual Properties, Inc. - Minneapolis MN

International Classification:

F01K 23/10
F02G 3/00
F01K 25/08
F01K 25/00

US Classification:

60618, 60616, 60651, 60671

Abstract:

An energy recovery system and method using an organic rankine cycle is provided for recovering waste heat from an internal combustion engine, which effectively controls condenser pressure to prevent unwanted cavitation within the fluid circulation pump. A coolant system may be provided with a bypass conduit around the condenser and a bypass valve selectively and variably controlling the flow of coolant to the condenser and the bypass. A subcooler may be provided integral with the receiver for immersion in the accumulated fluid or downstream of the receiver to effectively subcool the fluid near the inlet to the fluid pump.

US Patent:

20120023946, Feb 2, 2012

Filed:

Aug 5, 2011

Appl. No.:

13/204568

Inventors:

Timothy C. ERNST - Columbus IN, US
Christopher R. NELSON - Columbus IN, US

Assignee:

CUMMINS INTELLECTUAL PROPERTIES, INC. - Minneapolis MN

International Classification:

F01K 13/02

US Classification:

60660

Abstract:

The disclosure provides a system including a Rankine power cycle cooling subsystem providing emissions-critical charge cooling of an input charge flow, which includes at least one of an exhaust gas recirculation (EGR) source and a charge air source, upstream of an intake internal combustion engine. The system includes a boiler fluidly coupled to the input charge flow and adapted to transfer heat from the input charge to a working fluid of the Rankine power cycle subsystem and vaporize the working fluid, an energy conversion device fluidly coupled to the boiler and adapted to receive vaporized working fluid and convert the energy of the transferred heat, a condenser fluidly coupled to the energy conversion device and adapted to receive the working fluid from which the energy was converted, a pump having an inlet fluidly coupled to an outlet of the condenser and an outlet fluidly coupled to an inlet of the boiler, said pump adapted to move fluid from the condenser to the boiler, an adjuster that adjusts at least one parameter of the Rankine power cycle subsystem to change a temperature of the input charge exiting the boiler, and a sensor adapted to sense a temperature characteristic of the vaporized input charge. The system includes a controller that can determine a target temperature of the input charge sufficient to meet or exceed predetermined target emissions and cause the adjuster to adjust at least one parameter of the Rankine power cycle to achieve the predetermined target emissions.

US Patent:

20120036850, Feb 16, 2012

Filed:

Aug 9, 2011

Appl. No.:

13/206386

Inventors:

Timothy C. ERNST - Columbus IN, US
Christopher R. NELSON - Columbus IN, US

Assignee:

CUMMINS INTELLECTUAL PROPERTIES, INC. - Minneapolis MN

International Classification:

F02G 5/02
F01N 3/20
F01N 3/021

US Classification:

60615, 60311, 60287, 60618

Abstract:

The disclosure provides a waste heat recovery (WHR) system including a Rankine cycle (RC) subsystem for converting heat of exhaust gas from an internal combustion engine, and an internal combustion engine including the same. The WHR system includes an exhaust gas heat exchanger that is fluidly coupled downstream of an exhaust aftertreatment system and is adapted to transfer heat from the exhaust gas to a working fluid of the RC subsystem. An energy conversion device is fluidly coupled to the exhaust gas heat exchanger and is adapted to receive the vaporized working fluid and convert the energy of the transferred heat. The WHR system includes a control module adapted to control at least one parameter of the RC subsystem based on a detected aftertreatment event of a predetermined thermal management strategy of the aftertreatment system.