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US 11,454,198 B2Granted
Method and system for distribution of exhaust gas
AssigneeFord Global Technologies, LLC
InventorsXiaogang Zhang, Daniel Joseph Styles, Steven Wooldridge, Clayton Mikush
Life of this patent
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Abstract
Methods and systems are provided for to methods and systems for distributing exhaust gas to a turbine, a turbocharger bypass, and an exhaust gas recirculation (EGR) line via a valve. In one example, a method may include selectively flowing exhaust gas, via a valve coupled to an exhaust passage, to one or more of an exhaust gas recirculation (EGR) passage, an exhaust turbine, and an exhaust catalyst via a bypass passage without flowing through the exhaust turbine based on engine operating conditions.
Claims17
A method for an engine, comprising:
- during a first condition, flowing, via a valve coupled to an exhaust passage, exhaust gas from the exhaust passage to one or more of an exhaust gas recirculation (EGR) passage and an exhaust catalyst via a bypass passage while obstructing flow through an exhaust turbine via the valve, where the valve is adjustable via an actuator and a controller;
- and
- during a second condition, via the valve coupled to the exhaust passage, flowing exhaust from the exhaust passage to the exhaust turbine and obstructing flow through the EGR passage and the bypass passage via the valve, wherein exhaust gas flowing through the EGR passage flows through a plurality of flow dividers prior to entering an EGR cooler, the flow dividers distributing the exhaust gas over an entire volume of the EGR cooler.
A method for a valve coupled to an engine exhaust passage in a vehicle, comprising:
- during a first engine operating condition, operating the valve in a first mode to route an entire volume of exhaust gas from an exhaust manifold to an exhaust catalyst housed in the exhaust passage downstream of an exhaust turbine bypassing the exhaust turbine, the valve completely obstructing an outlet passage to the exhaust turbine during the first engine operating condition, the valve operated via an actuator and a controller, wherein the first engine operating condition includes a cold-start condition or regeneration of a particulate filter housed in the exhaust passage;
- during a second engine operating condition, operating the valve in a second mode via the actuator and the controller to route a higher portion of exhaust gas to the exhaust catalyst bypassing the exhaust turbine, and a smaller portion of exhaust gas to an intake manifold via an EGR passage, wherein the second engine operating condition includes engine operation immediately after attainment of catalyst light-off, and wherein the third engine operating condition includes an increase in engine load after engine start;
- during a third engine operating condition, operating the valve in a third mode via the actuator and the controller to route a larger portion of exhaust gas to the exhaust turbine, and a smaller portion of exhaust gas to the intake manifold via the EGR passage;
- during a fourth engine operating condition, operating the valve in a fourth mode via the actuator and the controller to route a larger portion of exhaust gas to the EGR passage, and smaller portions of exhaust gas through the turbine and the exhaust catalyst bypassing the exhaust turbine;
- during a fifth engine operating condition, operating the valve in a fifth mode via the actuator and the controller to route the entire volume of exhaust gas to the turbine;
- and
- during a sixth engine operating condition, operating the valve in a sixth mode via the actuator and the controller to route a larger portion of exhaust gas to the turbine, and a smaller portion of exhaust gas directly to the exhaust catalyst bypassing the exhaust turbine.
4 more elements
An engine system, comprising:
- a valve coupled to an exhaust passage;
- a hollow, cylindrical outer shell coupled to each of an inlet passage, a first outlet passage, a second outlet passage, and a third outlet passage;
- a hollow, cylindrical inner shell concentric to the outer shell including a first curved, rectangular cutout, and a second curved, rectangular cutout;
- and
- a motor coupled to the inner shell along a central axis of the inner shell to rotate the inner shell clockwise and counter clockwise relative to the outer shell.
2 more elements
Dependencies are inferred from the claim text.