is a part of exhaust pipes of the engine exhaust system, the exhaust system including an exhaust manifold, an exhaust pipe and a muffler, generally three correction control of the engine pollutant emissions catalyst is also installed in the exhaust system in the exhaust pipe typically comprises a front exhaust pipe and a rear exhaust duct.
1. Introduction automobile exhaust pipe noun
Automotive exhaust bellows hose, also known as car exhaust pipes, it is attached to the exhaust pipe between the engine exhaust manifold and the muffler , so that the whole exhaust system as a flexible coupling, so that a damping noise, easy installation, and lifetime extension effect of the exhaust muffler system. It is mainly used for light trucks, mini trucks and buses, the bellows structure is a double clad steel wire sleeve, both ends of the straight section of the outer ring structure of the card, so that the muffler is better results, the corrugated inner tube may be equipped with a telescopic section or nets. Material: main material is stainless steel SUS304, and take over the ferrule may be made of stainless steel or aluminized steel.
2. Classification of the exhaust pipe
Original tube
is the exhaust pipe when the vehicle is equipped factory.
back-pressure pipe
with the same principles of the original, but the sound would be nice than the original. Most such tubes original cars are mainly by change in volume of the silencer or pipe grid plate in the tube to produce a return pressure cylinder, when the engine ignition, the piston begins diameter mobility stroke, while the exhaust valve will the piston reaches bottom dead center will open before. In this case, the back pressure in the tube will block out of the exhaust gas, so that the gas mixture to achieve complete combustion. But back pressure is too strong can cause exhaust gas can not be completely discharged cylinder, resulting in combustion exhaust gas is mixed with air to reduce combustion efficiency along with, of course, the most direct impact is the horsepower output. Advantages: low noise and good low speed torque; Disadvantages: exhaust gas can not be discharged quickly at high speed, affect engine power output.
Semi back pressure pipe
The power of this low back pressure tube, along the exhaust back pressure of the tube better than, simply, it is between the pressure pipe and back through there are moderate back pressure between the tubes to get the starting torque, the exhaust back pressure tube cis ratio good, of course, also high-speed torque larger than the tube back pressure. Pros: Since the tail-speed torque performance is good; drawback: noise is too large.
straight pipe
acceleration will be better than the back pressure tube, but the biggest drawback is very noisy, quarreling makes quot; police Bei Bei quot; to chase you, back pressure pole low exhaust gas without resistance, poor low speed torque, high-speed large torque. Advantages: exhaust smooth, strong torque high speed; disadvantages: low speed soft power, noise.
and a half straight pipe
In fact, half of the straight tube with a half back-pressure pipe is the same, but the exhaust pipe diameter to larger than a half back pressure. Advantages: starting torqueThan half back down, but high-speed large torque.
Half-variable exhaust valve
connected to the exhaust system in the variable exhaust duct, an increase in the side tube. When a pipe is fully opened, the other channel is completely closed with respect to the single-variable exhaust valve, a better sound effects, the opening degree of one third of the time, the sound effect is more single valve row gas is substantially the same. Do can switch the sound, the sound can change the size of the exhaust gas.
3. The action of the exhaust pipe
for an automobile exhaust pipe automobile body effect, noise damping functions, extended row effect gas silencer system lifetime. For the average car, since the car’s exhaust gases leaving the engine a lot of pressure, which produces noise may make people feel mad, then play a major role is the car muffler exhaust pipe, install a silencer inside , which significantly reduces the noise of the car. The main principle is to split the airflow through multichannel, these shunts saw colliding with each other such that the air flow rate gradually decreases, and so forth cycle, such that the final exhaust gases flowing through the exhaust pipe of automobile exhaust, such that the noise reduction, so as to achieve the daily car noise reduction effect.