Paul Childs - Swampscott MA, US Anthony LaConti - Lynfield MA, US Keith D. Patch - Lexington MA, US Norman Dale Brinkman - Troy MI, US David R. Monroe - Bloomfield Hills MI, US David L. Hilden - Shelby Township MI, US Patrick G. Szymkowicz - Shelby Township MI, US
In accordance with one embodiment of the present invention, a device for generating hydrogen from a water vapor containing exhaust is provided. The device comprises an exhaust diverter and a hydrogen generation section. The exhaust diverter is configured to divert a portion of the exhaust to the hydrogen generation section. The hydrogen generation section comprises an electrolysis unit defining a hermetically sealed void volume configured to accumulate and store hydrogen. The exhaust diverter may be placed in communication with a heat exchanger configured to increase a fractional relative humidity of the diverted exhaust by cooling the diverted exhaust. In accordance with 37 CFR 1. 72(b), the purpose of this abstract is to enable the United States Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract will not be used for interpreting the scope of the claims.
Method And Apparatus For Controlling Ignition Timing In A Compression-Ignition Engine Operating In An Auto-Ignition Mode
Thompson M. Sloane - Oxford MI, US Norman D. Brinkman - Troy MI, US
Assignee:
GM Global Technology Operations, Inc. - Detroit MI
International Classification:
F02B 23/00
US Classification:
123299
Abstract:
A method for controlling timing of ignition of a fuel charge in a compression-ignition engine operating in a controlled auto-ignition mode wherein the engine includes controllable intake and exhaust valve actuation systems is described. The method comprises determining a preferred ignition timing for a cylinder charge and a mass of the fuel charge based upon operator torque request. A portion of the fuel charge is partially oxidized during a negative valve overlap period immediately prior to a compression stroke. Magnitude of the portion of the fuel charge is based upon the preferred ignition timing of the cylinder charge. A remainder of the fuel charge is injected into the cylinder during the compression stroke.
Hydrocarbon Selective Catalytic Reduction For Nox Control With Gasoline-Fueled Spark Ignition Engines Using Engine-Out Hydrocarbons
Kevin L. Perry - Fraser MI, US Thompson M. Sloane - Oxford MI, US Norman D. Brinkman - Troy MI, US Paul M. Najt - Bloomfield Hills MI, US
Assignee:
GM Global Technology Operations LLC - Detroit MI
International Classification:
F01N 3/00
US Classification:
60286, 60295, 60274, 701104
Abstract:
A method for controlling hydrocarbon delivery to a hydrocarbon selective catalytic reduction device configured to receive an exhaust gas flow from an internal combustion engine includes monitoring measurable variable terms including factors affecting a conversion efficiency in the hydrocarbon selective catalytic reduction device, determining classifications of the measurable variable terms based upon measurable variable ranges, determining a desired hydrocarbon delivery value range based upon the classifications; and utilizing the desired hydrocarbon delivery value range to control the hydrocarbon delivery to the hydrocarbon selective catalytic reduction device.
Passive Ammonia-Selective Catalytic Reduction For Nox Control In Internal Combustion Engines
Norman D. Brinkman - Troy MI, US Paul M. Najt - Bloomfield Hills MI, US Kushal Narayanaswamy - Sterling Heights MI, US David B. Brown - Brighton MI, US Wei Li - Troy MI, US Kevin L. Perry - Fraser MI, US Gongshin Qi - Troy MI, US Orgun A. Guralp - Ann Arbor MI, US
Assignee:
GM Global Technology Operations LLC - Detroit MI
International Classification:
F01N 3/00 F01N 3/10
US Classification:
60285, 60295, 60301
Abstract:
Engine exhaust gas feedstream NOx emissions aftertreatment includes a catalytic device connected upstream of an ammonia-selective catalytic reduction device including a base metal. Engine operation can be modulated to generate an engine-out exhaust gas feedstream that converts to ammonia on the catalytic device. The ammonia is stored on the ammonia-selective catalytic reduction device, and used to reduce NOx emissions in the exhaust gas feedstream.
Norman Dale Brinkman - Troy MI, US David Monroe - Bloomfield Hills MI, US David Hilden - Shelby Township MI, US Patrick Szymkowicz - Shelby Township MI, US
International Classification:
B01D053/56
US Classification:
423/239100, 422/171000, 422/177000, 422/172000
Abstract:
In accordance with one embodiment of the present invention, a NOremoval system is provided for removing nitrogen oxides from a nitrogen oxide containing exhaust. The NOremoval system comprises a NOtreatment section, a diverter, and a hydrogen generation section. The NOtreatment section is configured to remove nitrogen oxides from the exhaust. The diverter is configured to extract water from the exhaust and deliver extracted water to the hydrogen generation section. The hydrogen generation section is configured to deliver hydrogen to the NOtreatment section. The NOremoval system is configured such that the delivery of the hydrogen to the NOtreatment section is substantially isolated from delivery of the exhaust to the NOtreatment section. In accordance with 37 CFR 1.72(b), the purpose of this abstract is to enable the United States Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract will not be used for interpreting the scope of the claims.
Operating Methods For Selective Catalytic Reduction Of Nox
THOMPSON M. SLOANE - KEWADIN MI, US KEVIN L. PERRY - FRASER MI, US DAVID L. HILDEN - SHELBY TOWNSHIP MI, US NORMAN D. BRINKMAN - TROY MI, US JONG H. LEE - ROCHESTER HILLS MI, US MICHAEL B. VIOLA - MACOMB TOWNSHIP MI, US STEVEN J. SCHMIEG - TROY MI, US
Assignee:
GM GLOBAL TECHNOLOGY OPERATIONS, INC. - DETROIT MI
International Classification:
F01N 9/00 F01N 3/20
US Classification:
60276, 60295
Abstract:
Where oxygenated hydrocarbons, such as ethanol, may be considered for use as a reductant to be added to diesel or gasoline engine exhaust for promoting the catalyzed reduction of NOx to N, there is a need to continually adjust the amount of the reductant to be added as engine and catalyst operating conditions change. It is found that useful methods, to be practiced using a suitably programmed on-vehicle computer, can be based on a correlation for ethanol, or other specific reductant, with continually measured values of catalyst temperature, the oxygen and NOx contents of the exhaust, and the volumetric flow rate of the exhaust over a reduction catalyst, such as silver supported on alumina, selected for reduction of NOx to nitrogen. Effective amounts of the reductant for substantial reduction of NOx may be reliably determined using at least such parameters.
Method And Apparatus For Cold Starting A Spark Ignited Internal Combustion Engine Fueled With An Alcohol-Based Fuel Mixture
Norman D. Brinkman - Troy MI Cameron J. Dasch - Bloomfield Hills MI Lynn A. Rockwell - Anderson IN Daniel H. Hopper - Peru IN
Assignee:
General Motors Corporation - Detroit MI Delco Electronics Corporation - Kokomo IN
International Classification:
F02D 4300 F02D 4106
US Classification:
1231795
Abstract:
A method and apparatus for enhancing the cold starting performance of a spark ignition, internal combustion engine fueled with an alcohol-based fuel mixture is described. The quantity of fuel mixture delivered to the engine is regulated to establish a combustible fuel vapor-air mixture in each engine cylinder during cranking, while restricting the accumulation of unvaporized fuel in the each cylinder so as not to exceed a predetermined amount. In addition, each cylinder spark plug is provided with an ignition current having a peak magnitude sufficient to achieve voltage break down across each spark plug arc gap, when each gap is resistively loaded due to wetting in accordance with the predetermined amount of accumulated unvaporized fuel. Preferably, the quantity of fuel delivered to the engine during cranking is reduced at a substantially exponential rate as a function of the cumulative number of revolutions the engine is rotated during cranking. An ignition coil having a secondary to primary winding turns ratio in the order of 65:1, with its secondary winding wrapped onto a plurality of partitions in a segmented dielectric bobbin, is employed to provide the required ignition current for firing the engine spark plugs when the predetermined amount of unvaporized fuel accumulates in the engine cylinders.