Exhaust gas recirculation system and engine
AssigneeWeichai Power Co., Ltd.
InventorsQiang Zhan, Guoliang Chu
Life of this patent
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Abstract
An exhaust gas recirculation system includes a first turbocharger and a second turbocharger connected in series. An outlet of a turbine of the second turbocharger is connected to an exhaust pipe. An inlet of a compressor of the second turbocharger is connected to the exhaust pipe by means of an EGR gas collection pipe, and an outlet of the compressor of the second turbocharger is connected to an intake manifold by means of a low-pressure EGR exhaust pipe. The system employs energy of exhaust gas to drive turbines of a two-stage turbocharging system, thereby increasing utilization of the exhaust gas and improving the economic efficiency of an engine. An engine is also disclosed.
Claims19
An exhaust gas recirculation system, comprising:
- a first turbocharger, and
- a second turbocharger,
- wherein a turbine of the first turbocharger and a turbine of the second turbocharger are connected in series to an exhaust manifold of an engine, an outlet of the turbine of the second turbocharger is connected to an exhaust pipe, an inlet of a compressor of the first turbocharger is connected to an intake pipe, an outlet of the compressor of the first turbocharger is in communication with an intake manifold of the engine, an inlet of a compressor of the second turbocharger is in communication with the exhaust manifold through a first exhaust gas recirculation (EGR) intake pipe, and an outlet of the compressor of the second turbocharger is in communication with the intake manifold through an EGR exhaust pipe,
- wherein the inlet of the second turbocharger is in communication with the exhaust pipe through a second EGR intake pipe.
Dependencies are inferred from the claim text.