US 11,739,673 B2
Near-zero emitting diesel-electric locomotive using a high-speed diesel engine
James M. Wurtz, Jr., Mokena, IL (US); Scott Gatewood, Knoxville, TN (US); Michael Thomason, Knoxville, TN (US); D. Todd Jacobs, Lago Vista, TX (US); Daniel R. Piche, Eau Claire, WI (US); Cody J. Molls, Chippewa Falls, WI (US); H. Peter Claussen, Knoxville, TN (US); and John W. Robinson, Jr., Bloomer, WI (US)
Assigned to Catalytic Combustion Corporation, Bloomer, WI (US); and Knoxville Locomotive Works, Inc., Knoxville, TN (US)
Filed by Catalytic Combustion Corporation, Bloomer, WI (US); and Knoxville Locomotive Works, Inc., Knoxville, TN (US)
Filed on Sep. 30, 2022, as Appl. No. 17/937,130.
Application 17/937,130 is a continuation of application No. 17/052,720, granted, now 11,499,459, previously published as PCT/US2019/021266, filed on Mar. 8, 2019.
Claims priority of provisional application 62/667,095, filed on May 4, 2018.
Prior Publication US 2023/0031827 A1, Feb. 2, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. F01N 3/20 (2006.01); F01N 3/035 (2006.01); F01N 3/28 (2006.01); F01N 3/022 (2006.01)
CPC F01N 3/2066 (2013.01) [F01N 3/035 (2013.01); F01N 3/022 (2013.01); F01N 3/2892 (2013.01); F01N 2240/16 (2013.01); F01N 2560/021 (2013.01); F01N 2560/026 (2013.01); F01N 2570/14 (2013.01); F01N 2610/02 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A diesel-emissions reduction unit adapted for use with a diesel electric locomotive having a diesel engine and an electronic locomotive controller and a traction generator in communication with the diesel engine, the diesel emissions reduction unit comprising:
an inlet (825) adapted to receive an exhaust stream of the diesel engine;
a diesel oxidation trap catalyst (410) located adjacent the inlet and comprised of a substrate (411) including one or more corrugated, micro-expanded metal foil layers (413) containing a plurality of eyes (419) with openings;
a dosing system (33) including:
a dosing controller (39) including an injection lance (805) arranged to meter aqueous NH3 into the exhaust stream;
a nitrogen oxide (“NOx”) concentration sensor (41, 111);
an ammonia (“NH3”) concentration sensor (43, 113), and
at least one oxidation catalyst panel (119) arranged to isolate the NOx concentration sensor from NH3 in the exhaust stream; and
an exhaust heater (50) arranged to heat the exhaust stream of the diesel engine toward the inlet of the diesel emissions reduction unit.