twc introduce

What is a three-way catalytic converter? A three-way catalytic converter is the most important external purification device installed in a car's exhaust system, which can remove CO from the car's exhaust Harmful gases such as HC and NOx are converted into harmless carbon dioxide, water, and nitrogen through oxidation and reduction reactions. Simply put, they purify the exhaust gas. The working principle of a three-way catalytic converter is as follows: 1. When the engine exhaust gas is discharged through the exhaust pipe, due to the catalytic effect of the purifying agent in the three-way catalytic converter, the activity of C0, HC, and NOx is enhanced, leading to oxidation and reduction reactions. 2. C0 is oxidized to colorless and non-toxic C02 at high temperatures, HC compounds are oxidized to H20 and C02 at high temperatures, while NOx is reduced to N2 (nitrogen) and 02 (oxygen), thereby purifying the engine's exhaust emissions)

Method for installing a three-way catalytic converter

Method for installing a three-way catalytic converter: ① Use 8 bolts to install 2 heat shields on the new preheated three-way catalytic converter. ② Install the new gasket, protective ring, and sealing gasket onto the preheated three-way catalytic converter. ③ Use 3 bolts and 2 new nuts to install the preheated three-way catalytic converter with a tightening torque of 29N. m. ④ Use bolts and nuts to install the exhaust manifold bracket with a tightening torque of 42N. m. ⑤ Use bolts and nuts to install the No.1 exhaust manifold bracket with a tightening torque of 42N. m. ⑥ Connect the secondary oxygen sensor connector

audi a4 introduce

The Audi A4L is a popular B-class model manufactured by FAW Volkswagen and launched in April 2003. As the first model to introduce the concepts of long wheelbase and turbocharging, the A4L's sales have been enduring from B5 to B8. The new A4L abandons tear eye design and adds quattro four-wheel drive mode, making its appearance more fashionable and sporty, with more outstanding power and handling. The interior of the model is exquisitely crafted, with rich technological configurations and ample space, It has good practicality among B-class models. The FAW Audi A4 is sold in three displacement models, namely 1.8T, 2.4, and 3.0. The 1.8T is divided into four models: manual basic, automatic basic, comfortable, and technology leading. The 2.4 displacement model is divided into three models, including comfortable, comfortable sports, and comfortable luxury. However, there is only one version with a 3.0 displacement, and it is equipped with quattro full-time four-wheel drive system