The term “Jake Braking” is used to refer to engine braking via the compression of the exhaust gases to slow down a truck on a steep descent. This type of braking is technically known as engine braking, but was named after the signature sound produced by Jacobs engines when using this technique.
Unlike traditional engine braking, Jake Braking reduces engine speed without using the brake pads and drum on the truck, thus preserving the brake system and decreasing stopping time. Jake Braking is important because it provides extra stopping power to a heavy truck and helps reduce the wear on the brake pads and drums, allowing for longevity and safer braking when more brake power is needed.
Jake Braking can also be used as an audible signal to vehicles behind the truck that the truck is slowing, reducing the chances of a rear-end collision. The term was coined by truck drivers who heard the signature engine sound and dubbed it “Jake” after the Jacobs engine brand.
Who came up with the Jake Brake?
The Jake Brake was first developed by Clessie Cummins, the founder of Cummins Inc. In the 1950s Cummins was experimenting with methods to reduce the wear on diesel engines when going downhill, as the traditional method of applying the brakes to slow the vehicle caused a lot of strain on the engine.
Cummins invented a mechanism to inject exhaust energy into the cylinders, causing a retardation of the downward speed while limiting engine wear.
The initial invention, called the “Cummins Retarder,” was the first engine-braking mechanism of its kind and revolutionized the automotive industry. In 1965, recently released patent rights to the Retarder were sold to Jacobs Vehicle Systems, where the device was re-engineered and dubbed the “Jake Brake” after the nickname of its inventor, Clessie Cummins.
The Jacobs Jake Brake, as it is popularly known due to its widespread use on semi trucks, has also been applied to other fields including construction vehicles, boats, and stationary engines.
What is the difference between a Jake Brake and an engine brake?
A Jake Brake and an engine brake are both methods used to slow down a vehicle, but there are some key differences between the two. A Jake Brake is a type of engine retarder device typically used in diesel engines to control the speed of the vehicle.
It works by releasing pressure in the exhaust manifold and by manipulating the intake and exhaust valves. This reduces the engine’s RPMs when the driver steps on the brakes and allows the vehicle to slow down or stop more quickly.
Jake Brakes are commonly used on large trucks and construction equipment due to their power and ability to slow down heavy loads.
An engine brake, also known as a compression release brake, is a device used to slow a vehicle without using the traditional brakes. It works by manipulating the intake and exhaust valves, usually via a switch or throttle lever.
This reduces the engine’s compression and allows the vehicle to safely slow down without causing wear and tear on the brakes. Engine brakes are usually more efficient and quieter than Jake Brakes, making them ideal for passenger cars and lighter vehicles.
Are jake brakes legal?
The use of Jake brakes on public roads is dependent on the state laws in the US. In general, it is legal to use Jake brakes as long as all noise regulations and emissions standards are met. Generally speaking, Jake brakes are intended for use on highways and other roads with a posted speed limit of at least 45 mph, however, some states may have different rules and regulations.
It is important to obey the posted speed limits, as well as any State or Local laws regarding the usage of Jake brakes, as they can pose a hazard to other motorists if used improperly. Further, many States require that the Jake brakes be properly maintained and properly used.
As always, it is best to check with your local traffic enforcement agency to make sure you comply with all rules and regulations.
What states are Jake brakes illegal?
Jake Brakes, or engine brakes, are technically illegal to use in many states because they are very loud, disruptive, and can pose safety risks. However, a number of states have laws on the books specifically prohibiting the use of Jake Brakes, namely: Connecticut, Delaware, Georgia, Illinois, Indiana, Kentucky, Maine, Maryland, Massachusetts, Michigan, Missouri, New Jersey, New York, North Carolina, Ohio, Pennsylvania, South Carolina, Tennessee, Vermont, Virginia, Washington D.
C. , and West Virginia. One state that does allow for their use is Washington, but it is regulated and must be in compliance with applicable law. These laws specify the type of roads that can be driven with the engine brake and the keep the engine in compliance with noise standards.
Jake Brakes may also be prohibited in some municipalities, such as Austin, Texas, and St. Louis, Missouri. Additionally, a few countries have banned their use, including Australia, Canada, New Zealand, and some parts of Europe.
Exemptions are usually provided for specific types of vehicles and certain situations, such as emergency vehicles, but anyone who is caught using a Jake Brake when it’s not allowed can face stiff fines.
Why are Jake brakes not allowed?
Jake brakes, also known as exhaust brakes, are not allowed in most areas for a variety of reasons. First and foremost, the loud noise that is produced when using a Jake brake is a major nuisance to nearby neighbors and can be disruptive for driving conditions overall.
Additionally, excessive use of a Jake brake can cause a variety of problems such as additional wear and tear on the vehicle, blowing out fuses, and impairing other vehicle systems, potentially leading to bigger and more costly repairs down the line.
Furthermore, the vibrations that come along with Jake brakes can cause damage to public infrastructure such as bridges and highways. It is best to adhere to local laws and regulations when it comes to your vehicle, and Jake brakes are typically not allowed.
Are Jake Brakes and air brakes the same?
No, Jake Brakes and air brakes are not the same. A Jake Brake is a type of engine braking system that is designed to slow down a vehicle by shifting combustion energy into mechanical energy, allowing for a smoother deceleration than is possible with engine compression alone.
It does this by allowing exhaust gas to exhaust directly into the vehicle’s cylinders, thus creating a back pressure. Air brakes, on the other hand, use compressed air to generate the braking force. The compressed air enters the brake system and is used to apply pressure to either a cylinder or a diaphragm within the system.
This pressure opposes the motion of the vehicle and acts to slow it down. Additionally, the air brakes may be combined with other systems such as regenerative or dynamic brakes to further increase the braking force applied.
Therefore, Jake Brakes and air brakes are different although they both provide braking power to slow down a vehicle.
Do all diesels have a Jake Brake?
No, not all diesels have a Jake Brake. A Jake Brake is a type of engine brake that is used primarily on large diesel engines as a form of brakes. It is used to slow the vehicle without using the regular brakes.
Jake Brake works by opening the exhaust valves on the engine’s cylinders while the engine is running at higher RPMs, allowing the engine to provide increased resistance, which slows the vehicle. The name of the device comes from its original manufacturer, the Jacobs Vehicle System.
These brakes are most commonly found on large-displacement diesel engines, such as those installed on semi-trucks and construction equipment. So while they are not found on all diesels, they are a common feature on large diesel engines.
Is Jake braking the same as downshifting?
No, Jake braking is not the same as downshifting. Jake braking is a technique often used by truckers with manual transmissions that allows the driver to slow down their vehicle more quickly and safely.
Jake braking uses the compression of the engine to slow the vehicle down, which is why it is sometimes referred to as compression braking. This technique works by opening the exhaust valves before the piston reaches the top of its compression stroke, releasing the compressed air before it can enter the cylinders and drive the vehicle forward.
On the other hand, downshifting is when a driver shifts the gear down from a higher gear to a lower gear in order to reduce the speed of the vehicle. This is typically done when going downhill or when coming to a stop.
Downshifting allows the driver to maintain control and slow down the vehicle in a safe and controlled manner.
In summary, Jake braking and downshifting are two very different techniques used to slow down a vehicle, and are not interchangeable.
Does Jake Brake burn fuel?
No, a Jake Brake does not burn fuel. A Jake Brake is an engine braking system designed to help heavy-duty trucks, buses, and other commercial vehicles slow down quickly and safely. This system works by compressing the exhaust and slowing the engine down, without burning extra fuel.
Jake Brakes allow drivers to rely less on their tradition brakes, reducing wear and tear on those components, and helping them save fuel in the long run. It also helps to reduce brake fade and wheel lockup.
This system is mainly used in large vehicles that require powerful engine breaking, such as semi-trucks or buses.
Why do truckers use Jake brakes so much?
Truckers often use Jake brakes to help slow down the speed of their truck when descending a steep grade or when more braking power is needed than the engine braking system on the truck can provide. Jake brakes, which are also referred to as engine brakes, are an exhaust retarder device that uses the engine to create additional braking force for the truck.
By using the engine to slow the truck, the brakes are not overworked and are instead used more sparingly, thus helping to extend the life of the brakes and reduce repair costs. In addition to being cost-effective, using a Jake brake is also safer than relying solely on the brakes because it gives truckers more control when driving on steep or winding roads.
When should you not use Jake Brake?
Using a Jake Brake should be avoided in certain circumstances such as when driving on wet or icy roads, in residential areas, or when driving in an area with a lot of animals, such as deer crossing roads.
Additionally, if you are traveling on a steep mountain road, it’s best to not use the Jake Brake, as the sudden braking can cause instability and ultimately cause an accident. Moreover, the loud noise produced by a Jake Brake may be a distraction or a nuisance, or even a safety hazard, so it’s best to avoid using it in populated or urban areas, or in any situation where people are around.
Finally, excessive use of the Jake Brake can cause excessive wear on the brakes and can shorten the life of your brake pads and other brake components. Therefore, it is important to only use Jake Brake when necessary and should be avoided in certain situations.
Does engine braking harm your engine?
Engine braking can be beneficial in many cases, such as during descent on a long, steep grade or while driving off-road. However, engine braking can be detrimental to your engine if it is used excessively or incorrectly.
Excessive engine braking can put too much stress on the engine, causing it to run more slowly and potentially damaging the cylinders and other components. If engine braking is used too frequently or for too long, it can also put too much strain on the engine’s lubrication system, leading to accelerated wear and decreasing the engine’s lifespan.
If engine braking is used incorrectly, it can cause the engine to overheat due to the lack of airflow from the lack of acceleration. Additionally, engine braking can wear out your brakes more quickly, as it puts an extra load on the brakes due to the lack of momentum.
Overall, it’s best to use engine braking sparingly, especially if the engine is older, and to use it in the right circumstances. If you’re concerned with the potential wear on your engine, you can spread out the use of engine braking or opt for shifting gears to reduce your speed as a less engine-weary alternative.
Can you overuse Jake brakes?
Yes, you can overuse Jake brakes. When engines are operating at high speeds and loads, the brake pads and linings on the jake brake can wear down. This will increase braking time and decrease the jake brake’s efficiency.
Additionally, overusing Jake brakes can also cause engine stress, which can lead to damage over time. It’s best to use Jake brakes only when necessary and in short bursts to reduce strain on the vehicle.
Finally, when the engine is off and the engine brake is in a downhill position, the engine will not coast as effectively, so any overuse could consume more fuel.
What happens if you use your parking brake too much?
Using your parking brake too much can cause a variety of problems. Over time, the brake can become excessively worn leading to potentially dangerous situations. If you use the parking brake frequently, especially when the car is moving, you can put a large amount of strain on the brake and cause it to wear down.
You may also find that the cables on the parking brake corrode or stretch due to repeated use and will eventually require replacement. In addition, the parking brake, if too weak, can cause the car to roll when parked on an incline, which can lead to serious damage.
Therefore, it is important to use the parking brake regularly, but not excessively, in order to keep it in working order.