| 摘要 |
PROBLEM TO BE SOLVED: To reduce generation of NOX in such a way that thermal energy of exhaust gas recovered by a heat exchanger is recovered by driving a turbine so as to improve thermal efficiency, and a part of the exhaust gas is supplied to a combustion chamber as EGR gas, in an engine provided with an energy recovery device. SOLUTION: The engine is provided with a heat exchanger 4 disposed on a trail pf the turbine 20 of a turbocharger 3 driven by the exhaust gas, an EGR control valve 7 for supplying a part of the exhaust gas cooled by the heat exchange 4 into the combustion chamber 2 as the EGR gas, the heat exchanger 5 for cooling intake air delivered from a compressor 21 by water, and a confluent control valve 7 for supplying steam generated by exhaust gas energy of the heat exchanger to the turbine 20. Water heated by the heat exchanger 5 is converted into high temperature steam by the heat exchanger 4, and heat energy of exhaust gas is recovered by driving the turbine 20 with the high temperature steam.
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