What is the method for using exhaust brake?
2 Answers
Exhaust brake is used as follows: when the accelerator pedal is at zero position, the fuel injector stops injecting fuel. If the accelerator pedal or clutch pedal is pressed, the exhaust brake will automatically turn off, which can prevent the engine from stalling when stopping and the exhaust brake from activating during fuel injection. The exhaust brake is an auxiliary braking device, widely used in large diesel vehicles. Its function is to reduce or maintain the vehicle speed without using or minimizing the use of the service brake, but it cannot bring the vehicle to an emergency stop. The role of the brake is to reduce speed or stop the vehicle. Its working principle is: by utilizing the friction between the brake pads and brake drum, as well as between the tires and the ground, the kinetic energy of the moving vehicle is converted into heat energy after friction, thereby slowing down or stopping the vehicle.
The exhaust brake operation is quite straightforward. When I first drove trucks, I learned this: There's an exhaust brake switch, usually located near the steering wheel or dashboard, resembling a regular button – just press it to activate. The proper method is to engage it before or during downhill driving to assist with vehicle deceleration, essentially adding some resistance to the engine and reducing constant brake pedal usage. I always remind myself to use it only when appropriate, like during continuous downhill sections, keeping speed moderate to avoid excessive engine stress that could damage components. It should be combined with other braking methods rather than relied upon exclusively, especially requiring extra caution on icy/slippery roads. Improper use may increase fuel consumption or cause skidding – I recommend beginners practice several times to understand the vehicle's response before regular use. Ultimately, developing this habit extends brake pad lifespan, saves maintenance costs, and ensures safer driving.
