US 2011/0209473 A1 · SYSTEM AND METHOD FOR WASTE HEAT RECOVERY IN EXHAUST GAS RECIRCULATION

Abstract

A system and method for waste heat recovery in exhaust gas recirculation is disclosed. The system includes an engine having an intake manifold and an exhaust manifold, an exhaust conduit connected to the exhaust manifold, and a turbocharger having a turbine and a compressor, the turbine being connected to the exhaust conduit to receive a portion of the exhaust gas from the exhaust manifold. The system also includes an EGR system connected to the exhaust conduit to receive a portion of the exhaust gas, with the EGR system including an EGR conduit that is connected to the exhaust conduit to receive a portion of the exhaust gas, a heat exchanger connected to the EGR conduit and being configured to extract heat from the exhaust gas, and a waste heat recovery system connected to the heat exchanger and configured to capture the heat extracted by the heat exchanger.

Claims23

Dependent claims

An engine system, comprising:

an engine having an intake manifold and an exhaust manifold;
an exhaust conduit connected to the exhaust manifold to convey an exhaust gas away from the engine;
a turbocharger having a turbine and a compressor driven by the turbine, wherein the turbine is connected to the exhaust conduit to receive a portion of the exhaust gas from the exhaust manifold, and wherein the compressor is positioned upstream of, and connected to, the intake manifold;
and
an exhaust gas recirculation (EGR) system connected to the exhaust conduit to receive at least a portion of the exhaust gas therefrom, the EGR system comprising:
an EGR conduit connected to the exhaust conduit to receive the at least a portion of the exhaust gas, the EGR conduit having an input and an output;
a heat exchanger connected to the EGR conduit between the input and the output and being configured to extract heat from the at least a portion of the exhaust gas;
and
a waste heat recovery system connected to the heat exchanger and configured to capture the heat extracted by the heat exchanger.

6 more elements

A method for capturing waste heat in an engine system, the method comprising:

conveying exhaust gas from an exhaust manifold of an internal combustion engine to an exhaust gas recirculation (EGR) system;
circulating the exhaust gas through an EGR conduit of the EGR system;
extracting heat from the exhaust gas circulating through the EGR conduit by way of a heat exchanger;
and
capturing the heat extracted by the heat exchanger in a waste heat recovery system.

2 more elements

Dependencies are inferred from the claim text.

System and method for waste heat recovery in exhaust gas recirculation

Life of this patent

System and method for waste heat recovery in exhaust gas recirculation

Life of this patent

Abstract

Claims23