Engine system having cooled and heated inlet air

#The present disclosure relates generally to an engine system and, more particularly, to an engine system having inlet air that is both heated and cooled based on operational parameters of the engine.

#Engines, including diesel engines, gasoline engines, and gaseous fuel-powered engines are used to generate mechanical, hydraulic, or electrical power output. In order to accomplish this power generation, an engine typically combusts a fuel/air mixture. With the purpose to ensure optimum combustion of the fuel/air mixture and protect components of the engine from damaging extremes, the temperature of the engine and air drawn into the engine for combustion must be tightly controlled.

#An internal combustion engine is generally fluidly connected to several different liquid-to-air and/or air-to air heat exchangers to cool both liquids and gases circulated throughout the engine. These heat exchangers are often located close together and/or close to the engine to conserve space on the machine. An engine driven fan is disposed either in front of the engine/exchanger package to blow air across the exchangers and the engine, or between the exchangers and engine to suck air past the exchangers and blow air past the engine, the airflow removing heat from the heat exchangers and the engine.

#FIG. 1 is a pictorial and schematic illustration of an exemplary disclosed engine system; and

#FIG. 2 is another pictorial and schematic illustration of another exemplary disclosed engine system.

#FIG. 1 illustrates an exemplary disclosed engine 10 that combusts a fuel/air mixture to produce a power output. Engine 10 may include an engine block 12 that at least partially defines a plurality of cylinders 14. For the purposes of this disclosure, engine 10 is depicted and described as a four-stroke diesel engine. One skilled in the art will recognize, however, that engine 10 may be any other type of combustion engine such as, for example, a gasoline or a gaseous fuel-powered engine. In the illustrated embodiment, engine 10 includes sixteen cylinders 14 (only 8 shown). However, it is contemplated that engine 10 may include a greater or lesser number of cylinders 14 and that cylinders 14 may be disposed in an “in-line” configuration, a “V” configuration, or any other suitable configuration.

#As also shown in FIG. 1, engine 10 may be associated with one or more systems that facilitate the production of power. In particular, engine 10 may include a thermal management system 16 having a first circuit 18, a second circuit 20, and a third circuit 22. Fluid flows may be regulated through any one or all of first, second, and third circuits 18-22 to regulate temperatures of engine 10. It is contemplated that engine 10 may be associated with additional systems such as, for example, a fuel system, a lubrication system, a braking system, an air conditioning system, an exhaust system, an emissions control system, a control system, and other such known systems, which may be used to facilitate the operation of engine 10.

#First circuit 18 may include components that facilitate cooling of engine 10. Specifically first circuit 18 may include a heat exchanger 24 and a pump 26. Coolant such as water, glycol, a water/glycol mixture, a blended air mixture, or any other heat transferring fluid may be pressurized by pump 26 and directed through a passageway 28 to engine 10 to absorb heat therefrom. After exiting engine 10, the coolant may pass through a passageway 30 to heat exchanger 24 to release the absorbed heat, and then be drawn through a passageway 32 back to pump 26. A bypass circuit 34 having a valve 36 may selectively direct some or all of the coolant from passageway 30 around heat exchanger 24 to passageway 32 in response to one or more input.