Patent ID: 7654246

Claim:
An apparatus for an engine adapted to selectively operate in a homogeneous charge compression ignition combustion mode, said engine having an intake air manifold in controlled fluid communication with a source of ambient air, an exhaust manifold in fluid communication with an exhaust system, at least one combustion chamber in controlled fluid communication with said intake manifold and said exhaust manifold, and an exhaust gas recirculation system in controlled fluid communication with said exhaust manifold and said intake manifold, said apparatus comprising: a burner disposed in said exhaust gas recirculation system; and, means for controllably injecting fuel into said burner in response to an up-transient condition when said engine is operating in said homogeneous charge compression ignition combustion mode, said means for controllably injecting fuel into said burner comprising a fuel injector in controlled fluid communication with a source of fuel, and a fuel injector controller interposed the source of fuel and said fuel injector and adapted to receive a desired fueling input signal based on the oxygen content of recirculated exhaust gas, engine speed and load demand, said desired fueling input signal being corrected to track changes in the intake air and recirculated exhaust as introduced into the intake manifold during operation in said up-transient condition.