Supercharged internal combustion engine and method of operating same

Abstract

The invention provides a supercharged internal combustion engine and a method of operating the same, and relates to a supercharged internal combustion engine (1). The supercharged internal combustionengine comprises a liquid cooling device (10) comprising a coolant-conducting cooling circuit (10a); an intake system (2) for supplying charge air; an exhaust gas discharge system (3) for dischargingexhaust gas; at least one compressor (4) provided for compressing charge air in the intake system (2) and comprising at least one impeller mounted on a rotatable shaft in the compressor housing and equipped with impeller blades; an exhaust gas recirculation device (6) comprising a recirculation line (6a) leading into the intake system (2) so as to form a first junction point (6') upstream of the at least one compressor wheel; and a heat exchanger (7) arranged upstream of the first junction point (6') in the intake system (2) and incorporated into the cooling circuit (10a) for transferring heatbetween the charge air and the coolant. The aim of the invention is to provide an internal combustion engine of the above type, by means of which the formation of condensates in the intake system (2)can be counteracted. This is achieved by an internal combustion engine, characterized in that an electrically operated heating device (11) is arranged in the cooling circuit (10a) upstream of the heat exchanger (7).

Description

technical field [0001] The invention relates to a supercharged internal combustion engine having: [0002] - a liquid cooling device comprising a coolant circuit conducting the coolant, [0003] - intake system for supplying charge air, [0004] - Exhaust exhaust system for exhaust exhaust, [0005] - at least one compressor arranged for the purpose of compressing charge air in the intake system and comprising at least one impeller mounted on a rotatable shaft in the compressor housing and equipped with impeller blades, [0006] - an exhaust gas recirculation arrangement comprising a recirculation line leading to the intake system upstream of at least one compressor wheel, forming a first junction, and [0007] - A heat exchanger arranged upstream of the first junction in the intake system and integrated into the coolant circuit and for transferring heat between the charge air and the coolant. [0008] The invention also relates to a method of operating an internal combust...

AI Technical Summary

Problems solved by technology

The disadvantage of this concept is that it is not possible to heat the charge air via the coolant after a cold start of the internal combustion engine, since after a cold start the coolant itself usually does not have the high temperature required to heat the charge air, especially in ambient when the temperature is low

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