Patent ID: 8091535
Filing Date: 2012-01-10
Classification: F02D,F02M,Y02T

Abstract:
1. An internal combustion engine, comprising: a fresh-air system; a charge-air cooler disposed in said fresh-air system; an exhaust-gas system; an exhaust-gas turbocharger having a compressor and a turbine, said compressor being disposed, upstream of said charge-air cooler, in said fresh-air system, said turbine being disposed in said exhaust-gas system; a high-pressure exhaust-gas recirculation line branching off from said exhaust-gas system upstream of said turbine of said exhaust-gas turbocharger, said high-pressure exhaust-gas recirculation line having a high-pressure exhaust-gas recirculation valve, said high-pressure exhaust-gas recirculation line opening into said fresh-air system downstream of said charge-air cooler; a low-pressure exhaust-gas recirculation line having a low-pressure exhaust-gas recirculation line inlet disposed downstream of said turbine of said exhaust-gas turbocharger and having a low-pressure exhaust-gas recirculation line outlet disposed upstream of said compressor of said exhaust-gas turbocharger, said low-pressure exhaust-gas recirculation line branching off from said exhaust-gas system at said low-pressure exhaust-gas recirculation line inlet downstream of said turbine of said exhaust-gas turbocharger, said low-pressure exhaust-gas recirculation line having a low-pressure exhaust-gas recirculation valve, said low-pressure exhaust-gas recirculation line opening into said fresh-air system at said low-pressure exhaust-gas recirculation line outlet upstream of said compressor of said exhaust-gas turbocharger; an exhaust-gas flap disposed in said exhaust-gas system downstream from where said low-pressure exhaust-gas recirculation line branches off from said exhaust-gas system; an exhaust-gas recirculation cooler disposed in said low-pressure exhaust-gas recirculation line; and at least one pressure sensor disposed in said low-pressure exhaust-gas recirculation line and configured such that said at least one pressure sensor includes an absolute pressure sensor disposed in flow direction upstream of said exhaust-gas recirculation cooler, wherein said absolute pressure sensor is disposed between said low-pressure exhaust-gas recirculation line inlet and said exhaust-gas recirculation cooler.