Charge air system and charge air operation method

摘要

A charge air system for a combustion engine and an operation method are provided. The charge air system includes a first turbocharger stage for intake of combustion air supplied to the engine from a first pressure to a second pressure, a second turbocharger stage for compression of the compressed air to a third pressure, a first heat exchanger being arranged between the first and the second turbocharger stage for cooling the compressed air, a first intake air bypass for modulating the flow of the air through the first heat exchanger and/or a first mass flow control unit for controlling the flow of a cooling medium supplied to the first heat exchanger.

主权项

1. Charge air system for a combustion engine, comprising
a first boost system stage for compression of combustion air supplied to the engine from a first pressure to a second pressure a second boost system stage for compression of the compressed air to a third pressure, a first heat exchanger being arranged between the first and the second boost stage for cooling the compressed air, a first intake air bypass connected at or upstream of an inlet to the first heat exchanger and at or downstream of an outlet of the first heat exchanger and comprising a controllable bypass valve for modulating the flow of the air through the first heat exchanger, a first mass flow control unit comprising a controllable valve for controlling flow of a cooling medium supplied to the first heat exchanger, and an electronic control unit configured to control a temperature of air at or downstream of the outlet of the first beat exchanger to maintain temperature of the air at or downstream of the outlet of the first heat exchanger above a dew point temperature of that air by controlling a flow of the air through the first heat exchanger and by controlling the first mass flow control unit to control the flow of the cooling medium supplied to tile first heat exchanger.