In the midst of strangling fuel economy and emission regulations across the globe, an answer revealed itself: downsizing. The world’s largest automakers quickly did their best to make smaller, three-cylinder engines which employed turbocharging to help make up the difference in lack of grunt.
Except, now, it seems to have been the wrong move, according to Reuters.
General Motors specifically will work to make its smallest engines larger after starting reports showing these tiny powerplants actually emit more emissions than legally allowed. Most of the culprits are European-spec engines, where the increased loads don’t handle the work nearly as well as once imagined.
The news comes after a much-needed shift to real-world fuel economy and emission testing, something that has been laboratory based for many years. In the real world, engines behave much differently than simulated testing.
In the meantime, GM powertrain chief, Dan Nicholson, continues to press continents for one aligned set of emission standards in order to save valuable time and money for global automakers.