A muffler reduces engine emissions and noise and is usually located under a vehicle. It consists of a back box and tailpipes, and can be designed for performance or sound cancellation. Neglecting a muffler can lead to rust and failure, which can prevent a vehicle from passing smog tests.
A muffler is an engine’s exhaust system, designed to reduce emissions and noise. In the case of a vehicle, it is usually located under the car at the rear, although cargo trucks often use a system mounted vertically behind the cab. A muffler consists of a back box and one or more tailpipes. When a vehicle is smoggy, the inspector will insert a probe into the tailpipe to read the smog emissions emanating from the engine.
A muffler helps reduce the tremendous amount of noise an engine produces. Although internal combustion explains some of this noise, most of it comes from the pressure waves generated by the rapid opening and closing of the engine’s valves. The muffler’s back box is internally designed to receive pressure waves and rebound them within carefully designed chambers and cylinders. The shape and length of these baffles create pressure waves of approximately the same nature that move in opposite directions. When they collide with each other, waves of equal but opposite amplitude cancel each other. One drawback to this design is that it causes back pressure, which affects performance.
A second type of muffler, known as a performance muffler, consists of a straight, perforated steel pipe, which allows for sound cancellation and creates very little back pressure. The tube is encased in glass insulation, protected by a steel casing, and is known as a glass pack. This muffler was very popular in the 1960s and 1970s to upgrade muscle cars like the GTO or older classic Chevy. The muffler has a distinctive explosive sound that earned it the street name Cherry Bomb. These mufflers are still popular for hot rods and classics.
Because a muffler is located on the undercarriage, it is often neglected. A muffler can rust over time, rot, and even fall off the vehicle. It’s a good idea to take a look at your muffler from time to time to make sure it looks good and is securely attached. If a muffler rots, it’s time to replace it. A bad muffler can prevent a car from passing state-required smog tests. Many local auto stores do this job, or if you’re good with a wrench, you can buy mufflers at auto parts houses and chains.
Protect your devices with Threat Protection by NordVPN
