An air compression system includes an internal combustion engine operable to produce a power output in response to combustion of a fuel-air mixture, and an air compressor driven by the internal combustion engine and operable to draw in atmospheric air and discharge a mixed flow of compressed air and water. A water injection system supplies water to the fuel-air mixture and into the internal combustion engine, a separator assembly in communication with the air compressor separates a portion of the water from the compressed air, and a water passageway interconnects the separator assembly and the water injection system such that the air compressor supplies water to the water injection system.

Methods and systems are provided for maintaining a desired engine coolant level and a relative glycol amount in the engine coolant by using water sourced from on-board vehicle systems. In one example, a method may include supplying water to the engine coolant reservoir in response to the engine coolant level decreasing below a threshold. Also, a relative glycol amount in the coolant may be maintained at a threshold amount by adding water to the coolant in response to a relative glycol increasing above the threshold.

A condensation management device includes: a first chamber that receives liquid from an outlet of a charge air cooler (CAC) and that includes an aperture through a bottom-most wall of the first chamber; a second chamber that receives liquid from the first chamber when the aperture is open and that outputs liquid received from the first chamber to an intake system of an engine at a location between the CAC and a throttle valve; and a valve configured to open the aperture when at least one of: (i) a mass of the liquid within the first chamber is less than a predetermined mass; and (ii) a first pressure within the first chamber is greater than or equal to a second pressure within the second chamber. The valve is configured to block the aperture when (i) and (ii) are not satisfied.

An intercooler may include an air-outlet tank, a condensate collector for collecting condensate separated off the intercooler, and a condensate line connected to the condensate collector via an entrance and that opens out into the air-outlet tank via an exit. There may be a pressure difference between the entrance and the exit of the condensate line during operation of the intercooler, and said pressure difference may allow differential-pressure-induced discharge of condensate from the condensate collector via the condensate line.

An engine system for exhausting condensate water includes an intake line into which fresh air flows, an engine including a plurality of cylinders for generating driving torque by burning fuel, an exhaust line in which exhaust gas exhausted from the cylinders flows, a low-pressure exhaust gas recirculation system (LP-EGR) through which the exhaust gas flowing through the exhaust line is resupplied to the cylinder, and a turbocharger including a turbine rotated by the exhaust gas exhausted from the cylinder, a compressor for compressing external air and exhaust gas recirculation (EGR) gas by being rotated together with the turbine, and an exhaust pipe for exhausting condensate water to the outside, wherein the condensate water generated by the external air flows through the intake line and the EGR gas is recirculated by the LP-EGR.

A compensate water discharger coupled to, or integrally formed with, an intercooler may comprise a man body coupled to a tube of the intercooler and configured to collect compensate water in the tube, a collecting hole formed in an upper part of the main body and configured to provide a path along which the compensate water is collected from the tube to the main body, a discharging door formed in a side of the main body to discharge the compensate water to an outside, and a solenoid valve configured to open or close the discharging door.

A system and methods for routing condensate collected in a heat exchanger reservoir to either an air intake system or a position in the engine exhaust based on the type of contaminate in the condensate and operating parameters of the engine or the catalyst are described. In one particular example, condensate is routed to a first position along the engine air intake system in a first mode of operation, and a second position upstream of the catalyst along the engine exhaust in a second mode of operation, and a third position downstream of the catalyst along the engine exhaust in a third mode of operation. When substantially no contaminates are detected, the condensate may be routed into the engine exhaust upstream of the catalyst in order to cool the catalyst.

An intercooler may include an air outlet tank, at least one condensate collector for collecting at least one of condensate, which is separated in the intercooler, and moisture, and a drying agent arranged in the at least one condensate collector. The at least one condensate collector may be arranged in a region of the intercooler accessible to a charge air flow. The drying agent may be able to at least one of absorb, store and discharge at least one of the condensate and moisture to the charge air flow.

Methods and systems are provided for de-icing a charge-air cooler of a boosted engine system when the engine is turned off. In one example, a method may include recirculating air through a bypass passage including an activated electric supercharger and the CAC. The air is warmed by compression and thaws ice accumulated in the CAC.

Methods and systems are provided for maintaining a desired engine coolant level and a relative glycol amount in the engine coolant by using water sourced from on-board vehicle systems. In one example, a method may include supplying water to the engine coolant reservoir in response to the engine coolant level decreasing below a threshold. Also, a relative glycol amount in the coolant may be maintained at a threshold amount by adding water to the coolant in response to a relative glycol increasing above the threshold.