Factory supply catalytic converters for Toyota overbearing

Product introduction

Premium catalytic converter for Toyota overbearing，This product we use high-quality raw materials 409 stainless steel, and with high flow ceramic carrier, to help each car can purify exhaust gas, reduce fuel consumption, improve power, and extinguish engine failure lights!

1. Structure and design

Quantity and location

The Toyota Bado 4.0L model is equipped with two three-way catalytic converters, located in the front and middle of the exhaust system, to improve the efficiency of exhaust gas treatment by multi-stage purification.

Front catalytic converter: close to the engine exhaust manifold, fast absorption of high-temperature exhaust gas (300-500 ° C), to ensure efficient catalytic reaction.

Mid-stage catalytic converter: further treatment of residual pollutants to meet the emission needs of large-displacement engines.

Material and structure

Shell: Double stainless steel, interior filled with asbestos fiber felt and other thermal insulation material to prevent heat loss and protect the internal structure.

Support: honeycomb ceramic or metal support, coated with platinum (Pt), palladium (Pd), rhodium (Rh) and other precious metal catalysts, to promote REDOX reaction 68.

Weight: The weight of a single catalytic converter is about 5 kg, and the design needs to balance the exhaust back pressure and catalytic efficiency.

Second, the core role

Tail gas purification

Through the REDOX reaction, the harmful gases (CO, HC, NOx) in the tail gas are converted into harmless carbon dioxide (CO₂), water (H₂O) and nitrogen (N₂), and the purification efficiency can reach more than 90%.

Environmental compliance

The three-way catalytic converter is a key component to meet national 6B emission standards and ensure that the vehicle passes the annual inspection. If it fails, excessive exhaust emissions will lead to unqualified annual inspection.

Performance optimization

Stable air-fuel ratio: Linkage with the front oxygen sensor, feedback data to the ECU to adjust the fuel injection, optimize the combustion efficiency, and reduce fuel consumption by about 3%-5%.

Balanced exhaust back pressure: Reasonable design to avoid power loss or low RPM torque loss due to high back pressure.

3. Common faults and maintenance

Typical fault

Blockage: carbon deposits, sulfide deposits or lead poisoning lead to increased exhaust resistance, resulting in power decline, increased fuel consumption, and in serious cases may cause the exhaust pipe to burn red or even spontaneous combustion.

Precious metal failure: long-term use of inferior fuel (containing sulfur, lead) or high temperature sintering leads to catalyst inactivation, exhaust exceeding the standard.

Physical damage: chassis bump or carrier aging fragmentation, produce abnormal noise and reduce conversion efficiency.

Maintenance suggestion

Regular cleaning: Use a special cleaning agent or oxalic acid soak every 20-30,000 kilometers to remove carbon deposits and sulfides.

Oil selection.

Driving habits: reduce short-distance cold start driving to prevent long-term low temperature failure of the catalytic converter; Through potholes

The original catalytic converter contains precious metal coating, and the single replacement cost is about thousands of yuan. Lower cost but shorter life of sub-factory parts, and may affect the annual inspection pass rate.

Detection method

Back pressure test: Measure exhaust resistance to determine whether there is blockage 68.

Oxygen sensor comparison: If the voltage of the oxygen sensor before and after is consistent, it indicates that the catalytic converter6.

Temperature difference method: the outlet temperature of the catalytic converter should be 10%-25% higher than the entrance, otherwise the efficiency is less than 8.

5. Precautions

Anti-theft design: Precious metal coating value is high, some of the original catalytic converter integrated anti-demolition bracket, reduce the risk of theft.

Legal maintenance: Avoid illegal disassembly or use of defunct catalysts, which violate environmental regulations and may result in fines or forced vehicle scrapping