Patent ID: 11939900
Assignee: FORD GLOBAL TECHNOLOGIES, LLC
Field: Environmental technology (Chemistry)
Classification: CPC F | IPC F

Claim 11:
12. 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;
an oxidation catalyst and a lean NOx trap arranged along the second passage;
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; and
a bypass passage arranged in parallel with the first passage and in series with the second passage and the third passage.