Exploring the loudness of Jake Brakes
Jake Brakes, otherwise known as engine brakes, are devices commonly used in large commercial vehicles to assist with slowing and controlling speed. While they are incredibly effective in helping regulate the speed of heavy vehicles, they are also incredibly loud and seen as a nuisance by many.
The Mechanics of Jake Brakes
Jake Brakes are usually fitted on diesel engines and exploit the compression that occurs in the cylinders to create a braking effect. This is achieved by opening the exhaust valves for a period of time during the compression phase of the engine, releasing the compressed air and energy from the cylinders.
Why Are They So Loud?
The loudness of Jake Brakes comes from the fact that the compressed air and energy released from the cylinders of the engine needs to go somewhere and it does so through the exhaust system of the engine, resulting in a loud “popping” sound. This is amplified when the engine brake is used in busy urban environments and can travel over considerable distances, earning it the nickname “jake brake” after the sound it makes.
Are Jake Brakes Necessary?
The use of Jake Brakes is still necessary as modern truckers need every advantage they can get while carrying heavy loads on often dangerous roads.
What Can Be Done to Reduce the Volume?
- Mufflers: Mufflers can be used to reduce the amount of sound emitted from the engine, however, this does come at the cost of reduced engine performance.
- Regulations: There are regulations in place surrounding the operation of engine brakes, including times of day they can typically be used, speed restrictions and other government regulations.
- Design: Companies are continually working to improve the efficiency and design of engine brake systems to reduce noise levels.
While engine brakes are incredibly effective and beneficial for truckers, their loudness means it is important that steps are taken to reduce the volume. Mufflers, regulations and design improvements are just some of the ways this can be achieved.
3. How do Jake brakes work to slow a vehicle down?
Jake brakes work by opening and closing exhaust valves in the engine cylinders at the top of the compression stroke. The sudden release of pressure slows the engine down and helps slow the vehicle down as well. In some cases, the engine braking force can be sufficient to bring the vehicle to a complete stop.
4. Are there any regulations in place to limit the noise from Jake brakes?
Yes, there are regulations in place to limit the noise from Jake brakes. Most states have laws regulating when and how loud a Jake brake can be used. Additionally, some cities and counties may have ordinances that impose even stricter regulations.
1. Why are Jake brakes so much louder than standard brakes?
Jake brakes create much louder noise than standard brakes because they use a technique that rapidly opens and closes the exhaust valves of a diesel engine, releasing the stored energy in the cylinders instead of converting it to heat in the exhaust. This quickly dissipates the speed of the vehicle and the noise is created by the rapid opening and closing of the exhaust valves.