What is the HOWO Exhaust Brake Switch?
4 Answers
HOWO Exhaust Brake Switch The symbol for the HOWO exhaust brake switch is a valve in the middle of a pipeline, located to the left of the clutch pedal. Additional Information: 1. HOWO: HOWO is China's most advanced and premium new-generation heavy-duty truck developed by Sinotruk Group in 2004. It incorporates key global heavy truck technologies, targets both domestic and international markets, and aligns with international technical standards while possessing independent brand and intellectual property rights. 2. Exhaust Brake: Exhaust brakes are widely used in large diesel vehicles. A regulating valve is installed on the engine exhaust pipe. Closing this valve increases the pressure during the exhaust stroke, utilizing the generated negative pressure to obtain braking force. The regulating valve is generally driven by a control mechanism using compressed air or vacuum, often sharing the same power source as the main brake. The exhaust brake is typically activated by a manual switch. To prevent engine stalling when stopping and to avoid exhaust brake operation during fuel injection, the exhaust brake automatically disengages when the accelerator or clutch pedal is pressed.
The HOWO exhaust brake switch is a lever or button on the vehicle specifically designed to control the exhaust brake system, primarily used in diesel-engine models such as HOWO trucks. This feature is particularly useful when descending slopes or decelerating under heavy loads, as it helps slow down the vehicle effortlessly by restricting engine exhaust flow, reducing wear on the main brake pads, and improving fuel efficiency. During long-distance drives, I often engage it on steep slopes, noticing quicker vehicle response and smoother braking. However, avoid unnecessary use on flat roads or in low gears, as it may cause excessive engine vibration or stalling. The switch is typically located near the steering wheel for easy operation: pull once to activate, pull again to deactivate. Keeping it clean and dry prevents moisture or grease from causing poor contact, ensuring long-term safe driving. If issues arise, such as unlit indicators or unresponsiveness, promptly visit a repair shop to check for wiring faults.
As an auto mechanic, I find the HOWO exhaust brake switch crucial—it's the gateway to activating the exhaust brake system. Customers often complain about poor switch contact, such as a stuck handle or unresponsive button, mostly due to dust buildup or loose connectors. Minor issues can be resolved with cleaning, while severe cases may require replacing the entire assembly. The exhaust brake effectively substitutes conventional braking, extending brake lifespan and significantly reducing accident risks, especially on mountainous roads. For inspections, I advise owners to test it periodically: after starting the vehicle, press the switch and listen for changes in engine sound—the dashboard light should illuminate. Avoid splashing liquids onto the switch to prevent short circuits and more severe electrical issues. If it malfunctions, don’t force it; seek professional repair promptly to avoid the danger of complete brake failure.
I've been driving the HOWO truck for almost two years now, and that exhaust brake switch has been really helpful. It's a wrench-shaped controller – just press it to slow down using engine braking, saving me from constantly stomping on the brakes. More effortless and safer. My instructor taught me it's perfect for downhill stretches; engaging it early helps control speed. Better not mess with it on flat roads though, might strain the engine. As a newbie, I found the operation simple: pull the handle to activate, pull again to deactivate. It's conveniently placed within easy reach on the driver's seat. But gotta be careful not to use it recklessly during rain or sharp turns – could cause skidding or power loss, which is pretty scary. Regular checks are important too; if the switch feels stiff or makes weird noises, it might be malfunctioning.
