Patent ID: 8347606

Claim:
A system for controlling performance of an internal combustion engine, the system comprising: an internal combustion engine having an exhaust system for processing gases exhausted from said internal combustion engine; said exhaust system comprised of at least a first emission control device and a second emission control device, and at least one mixing device located between said first emission control device and said second emission control device; a delivery apparatus for introducing agent affecting operation of said second emission control device into said exhaust system; a controller configured to adjust at least one engine parameter in relation to an operating condition of said mixing device, said controller also being configured to adjust at least one engine parameter in relation to an operating condition of said first emission control device; a first pressure sensing device for determining a pressure difference across said mixing device as said operating condition of said mixing device, said pressure difference affected by adhesion of said agent to said mixing device; and a second pressure sensing device for determining a pressure difference across said first emission control device as said operating condition of said first emission control device, wherein said controller is configured to adjust at least one engine parameter in relation to the pressure difference across said mixing device or the pressure difference across said first emission control device.