US 12,071,886 B1
System and method for engine cold start
Jason Martz, Canton, MI (US); Paul Joseph Tennison, West Bloomfield, MI (US); Brien Fulton, Bloomfield Hills, MI (US); Michiel J. Van Nieuwstadt, Ann Arbor, MI (US); Eric Kurtz, Dearborn, MI (US); and Daniel Joseph Styles, Canton, MI (US)
Assigned to Ford Global Technologies, LLC, Dearborn, MI (US)
Filed by Ford Global Technologies, LLC, Dearborn, MI (US)
Filed on Oct. 3, 2023, as Appl. No. 18/479,978.
Int. Cl. F01N 3/10 (2006.01); B01D 53/94 (2006.01); F01N 3/20 (2006.01); F01N 3/28 (2006.01); F01N 3/32 (2006.01); F01N 3/36 (2006.01); F01N 13/00 (2010.01)
CPC F01N 3/208 (2013.01) [B01D 53/9431 (2013.01); B01D 53/944 (2013.01); B01D 53/9454 (2013.01); B01D 53/9477 (2013.01); B01D 53/9495 (2013.01); F01N 3/106 (2013.01); F01N 3/2013 (2013.01); F01N 3/2892 (2013.01); F01N 3/32 (2013.01); F01N 3/36 (2013.01); F01N 13/008 (2013.01); B01D 2258/01 (2013.01); F01N 2610/02 (2013.01); F01N 2610/03 (2013.01); F01N 2610/146 (2013.01); F01N 2900/1402 (2013.01); F01N 2900/1602 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An exhaust system for an internal combustion engine, comprising:
a combustor air pump selectively supplying air to a combustor located along a first passage;
a three-way valve positioned downstream of the combustor along the first passage;
an electric heater positioned along a second passage downstream of the three-way valve;
an oxidation catalyst or a three-way catalyst positioned along the second passage downstream of the electric heater;
a urea injector positioned along the second passage downstream of the oxidation catalyst or the three-way catalyst;
a selective reduction catalyst (SCR) positioned along the second passage downstream of the oxidation catalyst or the three-way catalyst;
a third passage arranged in parallel with the second passage the third passage coupled to the second passage and entering a fourth passage, the fourth passage extending to an engine exhaust passage and positioned upstream of a group of after treatment devices in the engine exhaust passage.