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Internal combustion engine and method for operating internal combustion engine

A technology for internal combustion engines and superchargers, applied in the direction of internal combustion piston engines, combustion engines, engine control, etc., can solve problems such as reduced performance and efficiency, power consumption, and stalling

Inactive Publication Date: 2013-03-13
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the supercharger is mechanically driven by the engine itself, thereby dissipating power to generate power, and the efficiency of the supercharger can be lower than that of the turbocharger during some operating conditions
[0004] Additionally, when integrating an EGR system with a forced induction system, due to limitations such as the turbocharger compressor low load surge limit (or "surge line"), the engine's Optimal performance may utilize more recirculated exhaust gas than the system can provide, where airflow into the engine stalls at the surge limit thereby reducing performance and efficiency at lower loads

Method used

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  • Internal combustion engine and method for operating internal combustion engine

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Embodiment Construction

[0040] The following description is merely exemplary in nature and is not intended to limit the disclosure, its application or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.

[0041]According to an exemplary embodiment of the present invention, the drawing is a schematic diagram illustrating an exemplary internal combustion engine 100 including an engine block 102, an exhaust system 104, a turbocharger 106, a supercharger 108 and controller 110 . Internal combustion engine 100 may be any suitable diesel or gasoline engine. Engine block 102 includes cylinders 103 that receive a combustion air and fuel mixture. Combustion of the combustion air / fuel mixture results in reciprocating motion of a piston (not shown) located in the cylinder. Reciprocating motion of the piston rotates a crankshaft (not shown) to deliver power to a vehicle powertrain (not shown) or an electrical generator...

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Abstract

In one exemplary embodiment of the invention, an internal combustion engine includes a turbocharger configured to receive an air flow and a first exhaust flow from the internal combustion engine and a supercharger downstream of the turbocharger configured to receive a compressed air charge from the turbocharger. The engine further includes an exhaust gas recirculation circuit receiving a second exhaust flow from the internal combustion engine and supplying the second exhaust flow to the compressed air charge upstream of the supercharger, wherein the second exhaust flow and compressed air charge comprise an exhaust-air mixed flow received by the internal combustion engine.

Description

technical field [0001] The present invention relates to internal combustion engines, and more particularly to turbochargers, superchargers and air intake systems for internal combustion engines. Background technique [0002] Efficient utilization of exhaust gas recirculation (EGR) is important for internal combustion engines, including gasoline engines and diesel engines. Efficient utilization of EGR generally supports the goal of achieving high power output from these engines while also achieving high fuel efficiency and meeting increasingly stringent engine emission requirements. In these engines, forced induction devices, including turbochargers and superchargers among others, are often employed to increase the mass air flow into the engine intake and the power output of engines with lower displacements. [0003] The turbocharger is powered by the exhaust gas, so efficient use of EGR and forced air intake from the turbocharger necessitates a co-design of these systems. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B37/04F02B37/16F02M25/07
CPCF02D23/00F02M25/0711F02B39/04Y02T10/121F02B37/04Y02T10/144F02B37/16F02M25/0728F02M26/08F02M26/25Y02T10/12
Inventor S.J.安德拉斯科C.J.凯尔布简B.A.奎克Y.肖T.L.巴亨斯基
Owner GM GLOBAL TECH OPERATIONS LLC