Finally, close-coupled catalytic converters sit within the exhaust system to help convert the escaping gas into less harmful gases. While all fuel-powered vehicles utilize catalytic converters, PZEVs use three and mount them closer to the engine, creating a system that more effectively captures smog-inducing pollutants such as nitric oxide. Among them are Hyundai, Volkswagen, and Ford.
It offers a number of benefits — perhaps most notably, reducing smog but do not require the driver to seek out any type of alternative fuel. Car and Driver report that PZEVs decrease the emissions that cause smog and acid rain by at least 90 percent when compared to standard vehicles. Select basic ads. Create a personalised ads profile. Select personalised ads.
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Making the Case for the Electric School Bus. Since the PZEV catalytic converter has twice the effective cleaning surface area of a standard unit, a greater level of harmful exhaust chemicals can be neutralized. The chemical reaction at play can only work effectively when the catalytic converter is hot, which leads us to the final PZEV modification- the engine computer.
The engine's electronic brain is re-tuned in PZEV cars to run the powerplant very hot at start up, helping the catalytic converter heat up more quickly so it can start doing its job faster. At the end of the day, these four changes enable ninety percent cleaner emissions than the average new vehicle, and exhaust that's actually cleaner than the air in many smoggy cities. Tags: Environment Auto You May Also Like. More Articles. From this author.
PZEVs have specially designed fuel system liners that prevent off-gassing, evaporation, and emissions due to fuel leakage. In addition, the fuel injectors close tighter than in standard vehicles to avoid evaporation.
Carbon Air Intake Traps: After turning off the engine, fuel vapors can stay in the combustion chamber and leak out, causing emissions. PZEVs have carbon air intake filters in the engine to prevent these vapors. This filtering system has a charcoal canister designed to absorb these emissions efficiently. Carbon Canister Scrubbers: Fuel vapors can also leak out and evaporate from the fuel cap, especially when outside temperature changes occur. PZEVs have carbon canister scrubbers installed in the fuel line that runs from the fuel line to the gas tank to prevent these emissions.
These catalytic converters are designed to get vehicles to speed quickly while eliminating nitric oxide and nitrogen dioxide. Close-coupled catalytic converters are lined with precious metals like platinum, palladium, and rhodium. When nitric oxide and nitrogen dioxide pass through, the catalytic converters change them into less harmful gases. Programming changes in the ECM delays ignition timing, which makes exhaust warmer.
As a result, the converter and other fuel system parts warm up more quickly, which can lower emissions. What's the benefit of getting a car with a PZEV badge? Cars that have a PZEV badge can help decrease your carbon footprint significantly. According to Subaru of Niagara, Subaru PZEV cars are much more eco-friendly than standard vehicles yet still perform well without cutting corners.
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