What happens to charge air in a boosted engine?
What happens to charge air in a boosted engine?
In modern boosted engines, this is a real possibility. Excessive temperatures can lead to reduced charge density and higher combustion temperatures which can affect torque, power and emissions. While turbochargers and superchargers increase charge air density, they also increase the temperature of the air in the intake manifold.
Which is the heart of the charge air cooling system?
The heart of the system is the air-to-air heat exchanger. The heat exchanger consists of a core of cross-flowing finned passages for the charge air, and the ambient cooling air. Inlet and outlet header sections for the charge air cap each side of the heat exchanger (see Figure 5) [ Merrion 1994].
How does indirect charge air cooling system work?
Indirect charge air cooling is a system where charge air is not cooled with air, as is usually the case, but by using engine coolant in a low temperature circuit as shown in Figure 7.
Where is the charge air cooling exchanger located?
In order to achieve maximum charge air cooling, the air-to-air heat exchanger is normally placed just ahead of the engine radiator (Figure 6) [ Merrion 1994]. If the vehicle does not have air conditioning, the heat exchanger and the radiator usually have the same frontal area.
What happens when an object is charged with air?
Charged air causes anomalous cooling of hot objects and anomalous heating of cold objects (but only for conductive objects. Insulators would quickly gain a surface charge and thenceforth REPEL the charged air.)
How is charged air different from normal air?
A gas composed mostly of positive and negative air ions (few neutral molecules) might exhibit a behavior very different than ordinary air. It would exhibit increased pressure, density, and refractive index. It would be heavier than normal air, and might be directly visible as an area of optical distortion in the air.
In modern boosted engines, this is a real possibility. Excessive temperatures can lead to reduced charge density and higher combustion temperatures which can affect torque, power and emissions. While turbochargers and superchargers increase charge air density, they also increase the temperature of the air in the intake manifold.
Indirect charge air cooling is a system where charge air is not cooled with air, as is usually the case, but by using engine coolant in a low temperature circuit as shown in Figure 7.
