A coolpower setup in a

truck A truck or lorry is a motor vehicle designed to transport cargo, carry specialized payloads, or perform other utilitarian work. Trucks vary greatly in size, power, and configuration, but the vast majority feature body-on-frame constructi ...

engine An engine or motor is a machine designed to convert one or more forms of energy into mechanical energy. Available energy sources include potential energy (e.g. energy of the Earth's gravitational field as exploited in hydroelectric power ...

can use an aftercooler mounted on top of the engine with a tip turbine fan, or an air-to-air cooler in front of the radiator. In either case, the goal is to cool the hot, compressed air going from the turbocharger into the engine. With the tip turbine, a small quantity of compressed air is bled off to spin a small fan that draws air through the aftercooler tubes. In some later models, a water cooler was also used, in addition to the tip turbine setup. Mack called the tip-turbine setup an intercooler and used a pyrometer to alert the operator if the

exhaust gas Exhaust gas or flue gas is emitted as a result of the combustion of fuels such as natural gas, gasoline (petrol), diesel fuel, fuel oil, biodiesel blends, or coal. According to the type of engine, it is discharged into the atmosphere through an ...

exceeded a limit. The tip turbine setup was compact and the shorter plumbing runs allowed boost to build faster. Later models with the front mounted air-to-air cooler required a larger turbocharger to fill the tubes faster but with the benefit of additional power. Modern trucks use the air-to-air cooler in nearly all cases. Large Mack trucks from the 1970s such as the Mack R-600 used coolpower systems. Some coolpower systems used vertical bar shutters that could be opened and shut in front of the radiator to maintain proper operating temperature. The Mack Cruise Liner model built in 1984, a 6X4 Primemover, used a coolpower engine.

Other meanings

Air intakes on turbochargers

The term is also used to refer to “Cool Power” air intake systems for

turbo In an internal combustion engine, a turbocharger (often called a turbo) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake gas, forcing more air into the engine in order to pr ...

charged engines. These systems provide cooler air to the turbocharger and engine, instead of the potentially too-warm air from the engine compartment. Cooler intake air is denser, which means that the engine can produce the same power with less fuel. Cooler air also gives the engine more power for applications such as towing heavy loads up driving up steep grades during the summer. Cooler air drawn into the engine compartment lowers the temperature under the hood, which allows plastic, rubber and electronic parts to last longer. Lastly, cool power systems will supports larger turbochargers by creating additional air flow to the engine.

Hydraulic drive system

The US military uses the expression "cool power" to describe its "regenerative drive unit", a "light-weight hybrid hydraulic drive system" that weighs 330 pounds. The "system can generate nearly of torque and power equivalent to a {{convert, 340, hp engine." It operates by storing "energy normally lost as heat during the braking process in a high-pressure oil tank called an accumulator." The system use two hydraulic-fluid storage devices controlled by a central processor. One of the reasons the US military is interested in the system is that its "cool" power allows vehicles to move "... without generating a "thermal footprint" that can be identified by enemy tracking systems."Permo-Drive Unveils Compact Hydraulic Drive System at 2003 SAE Show
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References

Trucks Engines