Quality replacement catalysts reduce NOx emissions

Doug Bentley, head of research and development at Klarius explains the importance of type-approved CATs

Quality replacement catalysts reduce NOx emissions
All diesel particulate filters (DPFs) must be type approved.

Fitting type-approved catalysts to vehicles from 2001 onwards become mandatory in the UK during 2009 to limit the amount of harmful NOx released into the atmosphere by the ever growing number of cars on Britain’s roads.

Vehicle type-approval is the quality control measure which is used to ensure aftermarket automotive component parts meet the same performance and quality standards as the original equipment fitted to motor vehicles when they are manufactured.

The law states that it is illegal to sell non-type approved CATs for vehicles registered after the 1st March 2001.

All DPFs must be type approved.

Each product that qualifies must have a type-approval certificate available as proof that it meets these standards.

Klarius works closely with the VCA to type-approve its products and is one of the only UK manufacturers to type-approve all its exhaust CAT and DPF systems.

Type-approval dictates that by matching, or indeed improving on the equivalent original manufacturer’s part, the emissions control function of the CAT is higher than that required by say the standard MOT test for example.

Channelling harmful exhaust gases

CATs act as flow-through devices, channelling harmful exhaust gases through either a ceramic or metallic monolith, prompting a reaction which cleanses the gas stream.

This reaction is attained by coating the CAT monolith with a precious metals which serves to convert Nitrogen oxides to less harmful Nitrogen gas during operation.

A wash coat is also added to the monolith to encourage the reaction and improve the durability of the precious metals contained within.

However Klarius warn that some motorists are still, usually unwittingly, having CATs that wouldn’t meet a genuine type-approval test fitted to their vehicles, which due to a number of factors, not only exponentially increase NOx emissions but also damage their vehicles performance and compliance.

Past a certain threshold, if a CAT is a lot cheaper than the mainstream alternatives then it is likely not to be able to pass a genuine type-approval test.

Typically a CAT should last the lifetime of a vehicle, so a type-approved replacement that operates at OEM levels should ensure complete security.

The entire Klarius Products CAT range is type-approved, certificated by an independent body, and each CAT carries a unique type-approval number.

For more information about Klarius, select ‘more details’ below.

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