Audi is using complex exhaust aftertreatment systems to meet increasingly lower emission limits. Besides the utilization of in-engine technology, the latest gasoline and diesel engines meet the strict standards especially due to powerful and sophisticated exhaust gas purification systems. Particulate filters complement catalytic exhaust aftertreatment on both TDI and TFSI engines.
When it comes to vehicle repairs, NSK sets out to make processes faster, safer and more reliable for garage technicians and mechanics. For this reason, those purchasing NSK ProKIT solutions receive 100% genuine wheel bearings alongside all of the supporting components needed to perform a fast and high-quality wheel bearing replacement. Hub bearings are not the simplest of parts to install, which is why NSK is providing some extra tips to help avoid common mistakes.
Four engine manufacturers are currently participating in Formula 1, supplying a V6 hybrid with an electrically-assisted turbocharger. Which of these four will be the first to market this e-turbo on one of their production vehicles? Probably Mercedes-AMG, which has just announced that its next model will be equipped with this type of system, supplied by Garrett Motion.
While the European Euro 6d standard limiting pollutant emissions into the atmosphere came into force in January this year, the European Commission is working on several options for the content and date of application of Euro 7. To develop their next products, manufacturers are already basing themselves on reference values.
The 114-kW fuel cell in the Toyota Mirai has a power density of 3.1 kW/l, one of the best scores of any of the fuel cells currently on the market. Due to their number and thickness, bipolar plates contribute a large share of the cell volume. A great deal of R&D is actively being carried out on this topic, and some of the results offer the hope of achieving a power density of 6 kW/l in the medium term.
After exiting the cylinder head, the exhaust gases from the latest supercharged petrol engines pass through the turbocharger turbine and then through a 3-way catalytic converter. Their path must be as short as possible in order to limit heat loss and reduce the time required to initiate post-cleaning after a cold start. However, this proximity complicates the operation of the catalytic converter, which receives unstable gas flows of different temperatures and different lambda coefficients (oxygen content). Continental has developed a turbine outlet integrating a mixer internal to the catalyst and an overflow valve that does not interfere with the post-cleaning operation.