What Is a APU on a Semi Truck?

A APU (Auxiliary Power Unit) is a device installed on semi trucks that helps reduce fuel costs, noise pollution, and engine wear and tear. The APU works by supplementing the truck’s engine with extra power when needed, allowing the main engine to be turned off for extended periods of time.

This helps save fuel by eliminating the need to keep the main engine running while parked. It also reduces noise pollution since the APU runs much more quietly than the main engine. Finally, it reduces wear and tear on the main engine since it isn’t being used as often.

The APU is comprised of several components which include a generator, an alternator, a battery bank and an air conditioning system. The generator produces electricity which is used to power accessories such as lights and air conditioning when the truck is parked or idling.

The alternator charges the battery bank so that it can supply electricity when needed. The air conditioning system cools down the cab of the truck when it is parked or idling.

The APU can be powered by either diesel or gasoline depending on what type of fuel the truck uses. Diesel powered APUs are usually more efficient than gas powered ones since they require less maintenance and offer better performance. However, gas powered APUs tend to be cheaper than diesel ones.

Most semi trucks are now equipped with an APU as standard equipment due to their numerous benefits. They help reduce fuel costs, noise pollution, and wear and tear on engines; all while providing comfort in hot weather conditions.

Conclusion:

A Auxiliary Power Unit (APU) is an important device installed in semi trucks that provides multiple benefits such as fuel savings, noise reduction, and improved engine life. It consists of several components including a generator, an alternator, a battery bank, and an air conditioning system which all work together to provide electricity for accessories when needed while keeping cab temperatures comfortable in hot weather conditions.

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Susan Delgado