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Netherlands adopts new PTI test for DPF inspections

26 January 2021

The Dutch government has adopted a regulation that introduces a new PTI test for the inspection of diesel vehicles equipped with diesel particulate filters (DPF). The regulation was signed on 12 January 2021 and published in the Government Gazette on 20 January 2021 [5018].

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The new PTI (NPTI) test involves the use of a particle counting instrument to detect particulate filter removal/tampering or other DPF malfunctions. The new test will replace older PTI methods, such as smoke opacity tests that are not sensitive enough for modern diesel engines, or the use of OBD data to diagnose the DPF during a PTI inspection.

The test is applicable to all diesel cars and commercial vehicles fitted with a DPF at the manufacturing stage (essentially, Euro 5 and later passenger cars and vans and Euro VI trucks). It involves a quick particle number measurement performed from raw exhaust (at the tailpipe) at idle condition using a relatively inexpensive (estimated ~7,500 euros) particle counting device.

The new regulation includes several amendments to the 2019 PTI regulation [4762] and specifies the effective date for the new PTI test. The key provisions are:

The NPTI initiative was launched by VERT in 2016. The Netherlands has been the first country to officially adopt the new, PN-based PTI inspection. Two new particle counters—by TEN and TSI—have been released and approved for PTI measurements. Other European countries, including Belgium and Germany, are expected to adopt similar, new PTI procedures for DPF inspections.

Source: Netherlands’ Ministry of Infrastructure and Water Management