Dynamometer Presentation on Absorption type dynamometer and Transmission type dynamometer
When it comes to understanding the performance of a vehicle, it’s important to test it under various conditions. Dynamometers, also known as dynos, are tools that allow mechanics, engineers, and car enthusiasts to measure the performance of a vehicle’s engine. Essentially, dynamometers test engines under varying loads to replicate actual driving conditions. This allows for a more accurate analysis of a vehicle’s horsepower, torque, and other relevant metrics. In this article, we’ll explore two common types of dynamometers, absorption dynamometers and transmission dynamometers.
Absorption Dynamometer
An absorption dynamometer tests a vehicle’s performance by using a device that absorbs the energy generated by the engine. The device will absorb energy and convert it into heat, allowing the mechanic or engineer to measure the amount of energy produced by the engine. Common types of absorption dynamometers include hydraulic dynamometers, electrical dynamometers, and air-gap dynamometers.
Hydraulic dynamometers are often used to measure the power output of large engines, such as those used in ships or airplanes. In a hydraulic dynamometer, the engine’s power is transmitted through the drivetrain and turned into hydraulic energy, creating resistance that the engine must overcome to maintain its speed. The energy absorbed by the hydraulic dynamometer is converted into heat and eventually dissipated.
An electrical dynamometer works similarly but instead converts the energy into electrical energy. The energy absorbed is turned into electrical energy and sent back into the electrical grid, reducing energy waste. Electrical dynamometers are often used for precise measurements because they can provide constant and stable resistance.
Finally, air-gap dynamometers are unique because they don’t have any physical contact with the engine. Instead, they use electromagnetic fields to create a “virtual” load that the engine must overcome. Air-gap dynamometers are often used for accurate testing of smaller engines, such as those found in motorcycles.
Transmission Dynamometer
Transmission dynamometers use the vehicle’s transmission to measure its performance. In a transmission dynamometer, the vehicle’s tires or wheels are replaced with rollers that the transmission turns. The dynamometer measures the resistance created by these rollers and records the results. This type of dynamometer is often used for measuring the power output of vehicles that use all-wheel drive or four-wheel drive.
One advantage of transmission dynamometers is their ease of use. They require less installation effort and can be used to test a wide range of vehicle models. However, the heat generated by the friction of the rollers can cause inaccuracies in the measurements, making it necessary to cool the transmission between runs.
Conclusion
Overall, both absorption dynamometers and transmission dynamometers are useful tools for testing and measuring a vehicle’s performance. Absorption dynamometers absorb the energy generated by the engine, while transmission dynamometers use the vehicle’s transmission to measure performance. Each type has its own strengths and weaknesses and is best suited for specific applications.
For accurate testing of large engines, hydraulic dynamometers are often used, while electrical dynamometers provide precise measurements. Air-gap dynamometers are great for small engines, and transmission dynamometers provide easy and versatile testing of a wide range of vehicle models. Regardless of which type of dynamometer is used, they are essential tools in the automotive industry for measuring and improving the performance of vehicles.
Keywords: Absorption Dynamometer, Transmission Dynamometer.