System for reducing engine emissions and backpressure using parallel emission reduction equipment

摘要

An exhaust emission reduction system for a fuel injected engine system has a plurality of emission reduction components configured to process the exhaust gas. The emissions reduction components include of one or more NOX reduction components and one or more filtration components configured to reduce particulate matter, hydrocarbons and/or carbon monoxide emissions. Each engine cylinder is associated with a respective one of the emission reduction components, such that exhaust gas from each engine cylinder flows through the respective one emission reduction component in parallel with the exhaust gas flows from the other cylinders through their respective emission reduction components.

主权项

1. An exhaust emission reduction system for an internal combustion engine, the engine having a plurality of cylinders and a power assembly, each cylinder having an associated fuel injector, an inlet for receiving air for combustion with fuel within the cylinder, and an exhaust for discharging exhaust gas resulting from combustion, the emission reduction system comprising:
a plurality of emission reduction components configured to process the exhaust gas, the emission reduction components comprising NOX reduction components and filtration components configured to reduce particulate matter, hydrocarbons and/or carbon monoxide emissions; and a fuel injection controller configured to control the firing of the fuel injectors, wherein:
each engine cylinder in the plurality of cylinders is associated with a respective one of the emission reduction components, such that exhaust gas from the each engine cylinder flows through the respective one of the emission reduction components in parallel with exhaust gas flows from other cylinders in the plurality of cylinders through their respective emission reduction components,the fuel injection controller is configured to order specified fuel injectors to skip firing in one or more cylinders having a respective NOX reduction component or in one or more cylinders having a respective filtration component,the fuel injector controller is further configured to control a number of emission reduction components used in each engine cycle, andthe fuel injector controller orders the specified fuel injectors to fire and the specified fuel injectors to skip firing in a desired pattern, such that either total NOX emissions or total particulate matter, hydrocarbon, and/or carbon monoxide emissions are selectively reduced.