what is the purpose of a jake brake
slowing the vehicle
title: Compression release engine brake text: Compression release engine brake A compression release engine brake, frequently called a Jacobs brake or Jake brake, is an engine braking mechanism installed on some diesel engines. When activated, it opens exhaust valves in the cylinders after the compression cycle, releasing the compressed gas trapped in the cylinders, and slowing the vehicle. The term "Jake brake", which properly refers to the Jacobs brand of engine brakes, has become a genericized trademark, and is often used to refer to engine brakes or compression release engine brakes in general, especially on large vehicles or heavy equipment. The name is derived from the title: Brake text: Brake A brake is a mechanical device that inhibits motion by absorbing energy from a moving system. It is used for slowing or stopping a moving vehicle, wheel, axle, or to prevent its motion, most often accomplished by means of friction. Most brakes commonly use friction between two surfaces pressed together to convert the kinetic energy of the moving object into heat, though other methods of energy conversion may be employed. For example, regenerative braking converts much of the energy to electrical energy, which may be stored for later use. Other methods convert kinetic energy into potential energy in such title: Brake text: significant parasitic power loss, thus impacting fuel economy and overall vehicle performance. Brake A brake is a mechanical device that inhibits motion by absorbing energy from a moving system. It is used for slowing or stopping a moving vehicle, wheel, axle, or to prevent its motion, most often accomplished by means of friction. Most brakes commonly use friction between two surfaces pressed together to convert the kinetic energy of the moving object into heat, though other methods of energy conversion may be employed. For example, regenerative braking converts much of the energy to electrical energy, which may be stored for title: Compression release engine brake text: brand products. Compression release engine brake A compression release engine brake, frequently called a Jacobs brake or Jake brake, is an engine braking mechanism installed on some diesel engines. When activated, it opens exhaust valves in the cylinders after the compression cycle, releasing the compressed gas trapped in the cylinders, and slowing the vehicle. The term "Jake brake", which properly refers to the Jacobs brand of engine brakes, has become a genericized trademark, and is often used to refer to engine brakes or compression release engine brakes in general, especially on large vehicles or heavy equipment. The name is derived title: Air brake (aeronautics) text: are only able to be opened when the airplane is approaching the runway and about to touch down. Lift dumpers, a type of air brake, are mounted on the top of a fuselage. When the panel is opened, it acts as a small spoiler, gently pushing the aircraft down. Flaps also increase drag and decrease airspeed, but are primarily for reducing the stall speed, allowing the aircraft to land at a slower speed. Following the invention of powered flight, and the rapid development of fixed-wing aircraft in the early 20th Century, man endeavoured for several decades to make airplanes faster