Patent ID: 7121254

Claim:
A compression ignited internal combustion engine with dual fuel injection capability operable in a purely diesel combustion mode or in a premixed charge compression ignition mode, comprising: a cylinder case containing at least one cylinder; a piston assembly operable within said cylinder; a cylinder head, defining an inlet port, affixed to said cylinder case and forming a combustion chamber with said piston when said piston is near top dead center of the compression stroke; an air intake runner to communicate air to said inlet port; a primary fuel injector operable to inject a measured amount of diesel fuel directly into said cylinder; a secondary fuel injector operable to deliver a measured amount of gasoline to said cylinder; an exhaust manifold for exhausting the products of the combustion process during the exhaust stroke of said piston assembly; an exhaust gas recirculation system selectively interconnecting said exhaust manifold and said air intake runner and operable to provide an amount of recirculated exhaust gas to said cylinder; and a control module responsive to engine load for selectively controlling said primary fuel injector, said secondary fuel injector, and said exhaust gas recirculation system.