Secondary Internal Combustion Device for Providing Exhaust Gas to EGR-Equipped Engine: 7,721,541

A system and method for providing exhaust gas to an EGR-equipped lean burn diesel engine (the primary engine). The exhaust gas is provided by a secondary internal combustion device, whose configuration, thermal cycle, and operating conditions may be different from that of the primary engine. The secondary internal combustion device may receive recirculated exhaust gas, fresh air, or some combination of both.