Patent ID: 8857179

Claim:
A secondary air system of an internal combustion (IC) engine, the system comprising: a variable speed air pump configured to output air; a gated check valve coupled to the variable speed air pump and having a pair of output ports, the gated check valve configured to fully close air flow to both of the pair of output ports, to open air flow to one of the pair of output ports, and to open air flow to both of the output ports; a pair of hoses coupled to the pair of output ports, respectively, and further coupled to a pair of points of injection for a first exhaust manifold of a first bank of engine cylinders and a second exhaust manifold of a second bank of engine cylinders, respectively, of the IC engine; at least one delta pressure feedback sensor configured to measure a pressure differential between a first point where the variable speed air pump and the gate check valve are connected, and a second point at one of the pair of output ports of the gated check valve; and a controller controlling the speed of the variable speed air pump, and a position of the gated check valve in response to the pressure differential measured by the at least one delta pressure feedback sensor.