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Report Claims Some Opel Diesels Evade Emission Tests
Diesel engines in at least some cars made by General Motors Co.’s Opel unit are rigged to sidestep European emission limits, Der Spiegel claims.
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Diesel engines in at least some cars made by General Motors Co.’s Opel unit are rigged to sidestep European emission limits, Der Spiegel claims. The magazine complains the German Transport Ministry has deliberately ignored the issue.
Opel insists its engine control software was “never designed to cheat or deceive.” The company also asserts its vehicles don’t use software that "recognizes whether a vehicle is undergoing an exhaust emission test.”
The environmental group Deutsche Umwelt Hilfe plans to detail the Opel test results during a press conference in Germany on Friday, according to Forbes.
Der Spiegel cites an analysis of an Opel Zafira MPV by TUV Nord Group, an international test and certification company. The evaluation claims the diesel’s emission controls are switched off whenever engine speed exceeds 2,400 rpm, vehicle speeds surpass 90 mph or the car reaches elevations above 850 meters (2,800 ft).
Opel says emission control systems are governed by the simultaneous measurement of multiple factors. It says looking at each parameter separately does not describe how the system works.
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