What is the correct way to use exhaust brake?
2 Answers
Exhaust brake should be used correctly as follows: 1. Exhaust brake cannot replace service brake for emergency braking, nor can it be used for parking brake, but it can be used simultaneously with service brake; 2. When using exhaust brake, the accelerator pedal should be at zero position, and the fuel injector stops injecting fuel. When the accelerator pedal or clutch pedal is pressed, the exhaust brake will automatically turn off to prevent engine stalling when stopping and exhaust brake operation during fuel injection; 3. Do not use exhaust brake on icy or slippery roads to avoid driving wheel slip and skid; 4. The power of engine exhaust brake depends on engine speed. To ensure braking effect, select an appropriate vehicle gear when using exhaust brake on long downhill roads.
Proper use of the exhaust brake is really important. During my days driving trucks, I found this feature mainly useful for downhill deceleration, especially on mountainous roads. First, you need to confirm your vehicle has this function—there’s usually a switch or button on the dashboard. When activating it, shift the transmission to an appropriate gear and keep the speed not too high; generally, it’s safer to use above 40 km/h. This way, the engine braking force can share the load with the brakes, preventing the brake pads from overheating and failing. I remember once on a long downhill stretch, I didn’t engage it in time, and the brakes overheated and started smoking—thankfully, I later learned to check frequently. Pay attention to road conditions when using it—best on dry, straight roads, and avoid it on slippery surfaces. Make it a habit to check if the switch operates smoothly before starting.
