SYSTEM USING SUPPLEMENTAL COMPRESSOR FOR EGR

摘要

PURPOSE: A system using a supplementary compressor for EGR is provided to solve the problem with cost due to a lot of fuel consumption. CONSTITUTION: For a system using a supplementary compressor for EGR, the supplementary compressor(130) is mechanically connected to an exhaust gas turbine. The supplementary compressor comprises a supplementary compressor entrance for accepting some of the exhaust gas, which flows out of an exhaust-gas manifold. The supplementary compressor compresses some of the exhaust gas and comprises a supplementary compressor exit, which is connected to an intake-air manifold. A supplementary EGR compressor absorbs the downstream exhaust-gas from the turbine. A three-way valve(154) determines the exhaust-gas ratio between an exhaust-gas discharge pipe(166) and the absorbing unit of the supplementary EGR compressor.