US 11,939,900 B1
System and method for engine cold start
Jason Martz, Canton, MI (US); Michiel J. Van Nieuwstadt, Ann Arbor, MI (US); Eric Kurtz, Dearborn, MI (US); Paul Tennison, West Bloomfield, MI (US); Brien Lloyd Fulton, Bloomfield Hills, MI (US); and Daniel Styles, Canton, MI (US)
Assigned to Ford Global Technologies, LLC, Dearborn, MI (US)
Filed by Ford Global Technologies, LLC, Dearborn, MI (US)
Filed on Apr. 4, 2023, as Appl. No. 18/295,440.
Int. Cl. F01N 3/08 (2006.01); F01N 3/20 (2006.01); F01N 13/00 (2010.01)
CPC F01N 3/0885 (2013.01) [F01N 3/0814 (2013.01); F01N 3/0842 (2013.01); F01N 3/2013 (2013.01); F01N 3/2033 (2013.01); F01N 13/011 (2014.06); F01N 2240/14 (2013.01); F01N 2240/16 (2013.01); F01N 2240/18 (2013.01); F01N 2250/12 (2013.01); F01N 2900/08 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An exhaust system for an internal combustion engine, comprising:
an air pump 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;
a third passage arranged in parallel with the second passage, the third passage coupled to the second passage and entering a fourth passage, and the fourth passage extending to an exhaust passage and positioned upstream of a group of after treatment devices in the exhaust passage;
a check valve positioned along the first passage; and
an oxidation catalyst located along the second passage downstream of the electric heater.