How do exhaust systems work

It is the first part of an exhaust system and is connected directly to the engine. Two sensors are employed one after the manifold and another after the catalytic convertor. Their job is to sense the level of oxygen in the exhaust gas. These serve as a connection to different parts of the exhaust system and are often designed keeping high pressure in mind. The part after the exhaust manifold, its job is to remove harmful gases from the exhaust like NOx and CO. Not present in all cars, the resonator is right after the catalytic converter.

It is employed to reduce noise over a certain frequency. As you might already know silencer is used to reduce noise. It is different than a resonator as it works for a wider range of sounds. Its the endpoint of the exhaust system.

It throws the exhaust gases out of the car. After the 4th cycle of a combustion engine, exhaust gases are produced. The exhaust manifold is connected to the engine and is made in such a way that it has pipes going in all cylinder. It has only one output. The manifold collects all the exhaust gases from different chambers at the same time and push them through a single pipe. The opening and closing of the exhaust manifold are controlled by a poppet valve. After the exhaust gases are collected they go through the catalytic converter through pipings.

Stock pipings are made in such a way that they can cut the cost of the car so they have unnecessary tapers that affect the pressure of exhaust gas and can cause back pressure which leads to performance reduction. Oxygen sensors are used to check the amount of oxygen in the exhaust gas.

You can unsubscribe at any time by clicking on the unsubscribe link at the bottom of our emails. Sign up for our newsletter! About Us Seneca Rd. Hours Monday: am - 6 pm Tuesday: am - 6 pm Wednesday: am - 6 pm Thursday: am - 6 pm Friday: am - 6 pm Saturday: am - 3 pm Sunday: Closed. Oxidation converts carbon monoxide into carbon dioxide and hydrocarbons into carbon dioxides and water.

Although these gases are still harmful to the atmosphere, they are less detrimental than gases produced by the engine. These components typically last for about , miles but commonly fail due to an exhaust leak, unburned fuel, engine misfire, or external damage.

When the cat begins to fail, you may notice a rotten egg smell and the check engine light will activate. Unfortunately, replacing this cat can get expensive due to its make-up of precious metals as cerium, platinum, rhodium, or manganese.

Muffler — Also named for what it does, the muffler reduces or muffles sound that is produced by the engine while maximizing exhaust gas flow. Better flow rate translates to better performance in all functions of the car. However, even a tiny hole in the muffler can affect its ability to muffle the sound or its efficiency of flow rate. Resonator — Similar to the muffler, this component changes the sound vibrations from the engine and can be placed either before or after the muffler in the exhaust system.

The main task of the resonator is to organize and tune vibration sounds but also plays a big role in improving exhaust flow effectiveness. To prevent power loss, the engine exhaust system must create a minimum resistance to exhaust gas flow.

Such resistance creates a back pressure in the exhaust system, which opposes the cylinders' working pressure. Furthermore, manufacturers design the exhaust system in such a way that it minimizes the restriction to the flow of exhaust gases. For this purpose, manufacturers provide cast-rib deflectors or dividers inside the exhaust manifold. In practice, manufacturers especially design the exhaust system and manifold as per the engine-chassis layout.

This is because the front suspension and steering system limit the space available for the exhaust manifolds. Especially, modern-day compact cars have little space in the engine compartment. Hence, manufacturers fit very tiny, and compact exhaust systems and manifold are in these cars. Exhaust manifolds are designed to avoid as much as possible the overlapping of exhaust strokes, which keeps the back-pressure to a minimum.

Manufacturers often do this by dividing the manifold into two or more branches. This prevents any two cylinders from releasing exhaust gases into the same branch at the same time.