The Ministry of Infrastructure and Water management has recently sent a letter to the Dutch Parliament with an update about Dieselgate in particular and more generally about the emissions of (diesel) vehicles. As annexes to that letter also three TNO reports have been sent to Parliament. In addition a fourth recent TNO report has been published that is relevant to developments with respect to emission legislation for passenger cars and vans.
EFFECTS OF A SOFTWARE UPDATE ON A VW POLO
In response to a request from Parliament, the Dutch Ministry of Infrastructure and Water management has asked TNO to collect data on the consequences for real-world emissions and for vehicle owners of the software update that has been made available by Volkswagen for cars with a defeat device.
For one VW Polo from the group of cars containing defeat devices the emission behavior has been measured and analysed before and after application of a software update. The vehicle was monitored during a two year period. The software update was found to have hardly any impact on the NOx emissions, CO2 emissions and fuel consumption, and engine power.
MEASUREMENTS FOR RDW ON A JEEP CHEROKEE AND SUZUKI VITARA
On behalf of the Dutch road vehicle authority RDW, TNO has carried out emission investigations on a Euro 5a Jeep Cherokee and a Euro 6b Suzuki Vitara, both equipped with a diesel engine. Previous tests by RDW from 2017 yielded results that justified further investigations. The objective of the follow-up investigations carried out by TNO was to measure the NOx emission behavior of both vehicles before and after an update of the engine calibration software. Emission measurements have been carried out on a test track at the RDW facilities, on a chassis dynamometer and on public roads. For information on the interpretation of the results we refer to RDW.
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SOURCE: TNO
