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US 11,939,900 B1Granted
System and method for engine cold start
AssigneeFord Global Technologies, LLC
InventorsJason Martz, Michiel J. Van Nieuwstadt, Eric Kurtz, Paul Tennison, Brien Lloyd Fulton, Daniel Styles
Life of this patent
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Abstract
Methods and systems for reducing emissions of an internal combustion engine are described. In one example, an electric heater and a passive NOx absorber or other emissions control device are positioned in a passage downstream of a combustor so as to process emissions from the combustor before an engine is started.
Claims15
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.
4 more elements
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.
4 more elements
Dependencies are inferred from the claim text.