Can the Exhaust Brake Be Used for a Long Time?
2 Answers
Exhaust brake cannot be used for a long time. Below is detailed information about exhaust braking: Exhaust braking is also a braking method for large trucks when going down long slopes, but it should not be used for extended periods, as it can cause significant damage to the engine, especially affecting the valves. It is recommended to use it with intervals of about 5 seconds each time. Its working principle involves using a shut-off valve to close the exhaust, creating a rapid increase in local air pressure within a small space, thereby reducing the engine speed to achieve the braking effect. For vehicles equipped with a hydraulic retarder, which offers excellent performance at both low and high speeds, it can handle the vast majority of long gentle slopes without needing to be used in parallel with the main braking system, except for extremely steep slopes. It can also be used in conjunction with the exhaust brake. On ordinary gentle slopes, intermittent braking can be used to protect the brake pads from overheating, which could lead to reduced braking efficiency or even failure.
I've been driving heavy-duty vehicles for many years, and the exhaust brake is really convenient for slowing down on descents, but it should never be left on continuously. During long-distance drives, I often use it, but only for short periods, like a few minutes at most. Once, I forgot to turn it off, and the exhaust system overheated, nearly destroying the turbocharger—repairs cost me almost ten thousand yuan. Keeping it on for too long increases engine load, spikes fuel consumption, and can lead to carbon buildup or excessive emissions, harming the environment. Plus, the noise becomes unbearable, making the ride uncomfortable. Safety first—use it only on steep slopes, turn it off during normal driving, and regularly check the exhaust pipe for blockages to keep the system clean and efficient.
