Porsche’s patent focuses on how to keep the system honest. Current water-injection setups rely on pressure sensors at the ...

A few months back, Porsche engineers obtained a patent for a system to inject water into the cylinders of an engine. That's ...

Modern diesel cars, trucks and SUVs have selective catalytic reduction (SCR) systems to reduce exhaust pollutants and meet emissions standards. These systems work by injecting diesel exhaust fluid ...