Abstract:
An apparatus, system, and method are disclosed for efficiently increasing exhaust flow temperature for an internal combustion engine. The method (700,800) includes checking (702) whether a user input to disable an exhaust valve opening mechanism is active. The method further includes monitoring (704,712,804) exhaust gas mass flows and temperatures, interpreting (710,802) required exhaust temperatures for aftertreatment devices, and surveying (712,806) a plurality of operating conditions for a combustion engine. The method includes determining (716,810) a crankshaft angle for dynamically engaging (718,818) an exhaust valve open mode based on the exhaust temperature, the required exhaust temperature, and the engine operating conditions. Dynamically engaging the exhaust valve open mode includes selecting a specific crankshaft angle for each combustion cycle of the engine.
Abstract:
Systems and methods to extend a life of a component of a cylinder deactivation system are provided. A method includes generating, by a controller, an initial life factor for the component; initiating, by the controller, a CDA mode for an engine; determining, by the controller, an actual life factor for the component, the actual life factor determined by comparing a number of switching events of a cylinder in the CDA mode to a number of cycles of the cylinder in the CDA mode; comparing, by the controller, the actual life factor to the initial life factor; and modifying, by the controller based on the comparison, operation of the engine in the CDA mode to adjust the actual life factor.
Abstract:
One embodiment of the present invention is a method for charging a depleted or spent solid storage media with ammonia. Other embodiments include unique methods, systems, devices, and apparatus involving charging spent solid storage media with ammonia. Further embodiments, forms, objects, aspects, benefits, and advantages of the present invention shall become apparent from the figure and description provided herewith.
Abstract:
A method and related apparatuses and systems for operating an engine that provides a high level of NO X to regenerate particulate matter deposited on a particulate filter. The method includes producing NO X in response to a NO X excess capacity value of a NO X reduction device. The method optionally includes determining that particulate matter exceeds an enhanced passive regeneration threshold amount before providing a high level of NO X . The method optionally includes producing a higher particulate emissions output value to warm the engine exhaust to bring an after treatment catalyst to an optimal operating temperature. The method can be implemented with a closed loop feedback controller, which may be configured to reduce particulate matter variation.