Back to results
US 12,535,026 B2Granted
Methods and systems for an exhaust system
AssigneeFord Global Technologies, LLC
InventorsRobert A. Wade, Adam Matthew Selthofer, Gianluca Mantovano
Life of this patent
Estimating the term…
Abstract
Methods and systems are provided for an exhaust gas heat recovery (EGHR) device. In one example, a system includes an exhaust gas heat recovery (EGHR) device with a bypass passage arranged upstream of a catalyst. A bypass valve is configured to control exhaust flow into the bypass passage based on one or more of an exhaust temperature, an engine load, and a cabin heating request.
Claims15
A system, comprising:
- an engine;
- a catalyst;
- an exhaust gas heat recovery (EGHR) device with a bypass arranged upstream of the catalyst, wherein the EGHR device is arranged directly between the engine and the catalyst;
- an air delivery passage with an air flow valve, wherein the air deliver passage delivers intake air from an engine intake to an exhaust passage upstream of the bypass;
- and
- a controller comprising instructions stored on non-transitory memory thereof that when executed enable the controller to:
- responsive to a catalyst temperature being less than a threshold catalyst temperature and an exhaust gas temperature being less than a threshold exhaust gas temperature, flow exhaust gas and intake air through the bypass;
- responsive to the catalyst temperature being greater than or equal to the threshold catalyst temperature and the exhaust gas temperature being less than the threshold exhaust gas temperature, flow exhaust gas and intake air to the EGHR;
- responsive to the catalyst temperature being greater than the threshold catalyst temperature and the exhaust gas temperature being greater than the threshold exhaust gas temperature, close the air flow valve and flow exhaust gas to the EGHR.
6 more elements
A system, comprising:
- an engine coupled to an exhaust passage;
- an exhaust gas heat recovery (EGHR) device directly downstream of the engine relative to a direction of exhaust gas flow;
- a catalyst arranged downstream of the EGHR device;
- a bypass passage comprising an inlet between the engine and the EGHR device and an outlet between the EGHR device and the catalyst;
- a bypass valve;
- an air delivery passage with an inlet coupled to an airbox arranged in an engine intake and an outlet that intersects with an exhaust passage upstream of a bypass valve of the bypass, wherein an air flow valve is arranged in the air delivery passage;
- and
- a controller comprising instructions stored on non-transitory memory thereof that when executed enable the controller to:
- adjust a position of the bypass valve and the air flow valve based on a catalyst temperature and an exhaust gas temperature.
6 more elements
Dependencies are inferred from the claim text.