“We strongly reject the conclusions of the Deutsche Umwelthilfe “. Debuted the Opel , a known dry printing with which denies the presence of any fraudulent software on their diesel engines.
The test of the Zafira. The seed of doubt, this time, was planted by that German environmental organization. Who in previous weeks he had pointed the finger at the Mercedes-Benz (only to be denied by the manufacturer of Stuttgart) and who now publishes a study with figures, graphs and bench testing of a Zafira 1.6 CDTI with 136 hp with approval Euro 6b .
The Opel: “Results not understandable.” “We want to reiterate once again this concept: the software of General Motors are not able to notice when a vehicle is subjected to a test of emissions,” adds the House. Who continues: “The results of tests conducted by the association of a Zafira are not understandable.”
The counter of the House gave smooth results. “After receiving the communication Duh,” says the German manufacturer, “our engineers have immediately tested a corresponding vehicle (a Zafira 1.6 CDTI Euro 6) on a chassis dynamometer, conducting further tests with both single roller that double. The values ”says Opel,” fall in both cases within legal limits. It was the only result we expected, as the condition, static or dynamic, the rear axle does not affect the levels of emissions. ” “False and unfounded”: so, in conclusion, the House sets out the findings of the test conducted by Duh.
Data environmentalists. The German environmental organization, instrumental in the testing documentation that we propose here, found some suspicious findings. In particular, repeating the cycle NEDC European approval, the Duh got significant discrepancies in NOx emissions between the tests on two or four wheels in motion: in the first case, the levels are within the limits of law, writes Deutsche Umwelthilfe in its conclusions, while in the second SFOR them.
The graph of Duh, the large discrepancy between the test roll double (left) or single (right).
The strange behavior of the SCR. The test continues the association, has brought to light also some fluctuations in the levels of NOx in the test phases at low speed, according to the entity that are to be attributed to the operation of the SCR, the catalyst system selective . “The behavior of the SCR,” notes so Duh, “seems to depend on test mode.”
The TÜV tested this Opel. Just in the past, excited, minutes, the Rüsselsheim added, in support of its position that the “counter-test” was made today in the presence of the engineers of TÜV Hessen. The experts of the institution, said Opel, also attended the tests with the double roller, where both axes were moving. Again, the results are within the legal limits on emissions, says the House, which speaks of a full report being completed by the TÜV Hessen, which will be further certified to official findings.
Fabio Sciarra
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