BMW introduces the M4 MotoGP Safety to coach with water injection. The achievement-rising technology should be soon used also in a standard engine.
For the MotoGP season BMW already puts the Safety to coach to the 17th time. In the highest class of the motorcycle racing sport is used in 2015 of the M4. The exterior divergences to the standard model are evident: Beside a Beklebung in the BMW m colours the M4 coupé as a Safety coach owns a light beam LED on the roof and additional LED streakers in the lower air intake. In addition there come numerous m performance-cultivation parts (Gather up, rear diffuser, Schweller, etc.) which are also available for the standard version of the M3 and M4. A thread chassis and a coach voucher rear wing which provides for more Anpressdruck belong to the other specific features.
Dragrace in Bavarian: M4 against i8
Water injection to the cooling of the loading air
However, a new technology which uses BMW with the M4 MotoGP Safety coach to the increase in output is especially interesting: The twice charged Reihensechszylinder disposes here of a water injection. The system provides, beside the loading air cooler also obstructed in the series, for an additional lowering of the loading air temperature. Purpose of the thing: more achievement and less load for engine and Nebenaggregate (Turbos, catalysts). Now for more power the boost pressure can be raised on the one hand – the Turbos shovel more air in the fuel rooms. Second the preignition can be raised. Both optimises the achievement and torque course, gives a hard time to the engine, however, thermally. Since with the boost pressure there rises the compression of the air and therefore her temperature. The similar results from a raised pre-ignition. A former ignition time lets the combustion temperature rise, engine beating (uncontrolled combustion of the mixture) promotes with it and adds above all the piston. The chill effect of the water injection counteracts against the temperature rise of the loading air and in the furnace chambers. Another side effect: By the sinking temperature rises the density of the loading air what raises her oxygen salary and affects again achievement-rising.
About 460 HP for the M4 MotoGP Safety coach
The functionality of the water injection in the M4 MotoGP Saftey coach is simple: Three injection nozzles are in the aerial collector of the engine and spray water to a fine fog. Warmth is taken away to the surrounded air by the vaporisation of the water molecules – the already mentioned cooling of the loading air. The water is tapped not possibly from the piece of bumf water container, but comes from five litres of touching container in the Kofferrraum is supplied which the system with the necessary liquid. BMW recommends the principle as an innovation, however, really the water injection with Turbomotoren is established tuning means. Often the water is still mixed with methanol what prevents the freezing of the water pipes in the cold season. Moreover, methanol improves the Klopfverhalten again and works as an additional fuel. In the middle of the 70s the water injection found use even with one of the first standard vehicles with turbocharger: Saab 99 Turbo could be ordered optionally also with water injection what increased the achievement of otherwise 145 HP on just 160 HP.
Though the water injection raises the complexity of the internal combustion engine, however, she provides beside the increase in output also for more efficiency and a reduction of the pollutants originating from the combustion, in particular from embroidery oxide (NOx). Besides, petrol with less octane can be used for the company of the engine. Advantageously in the countries which do not offer all over the country spirit with 98 octanes. Then 95 octanes (E10) also do it, without the engine starts "to knock". BMW also promotes these effects. The consumption advantage of the M4 engine with water injection should lie under full load at about eight percent. The similar is valid for the increase in output. BMW does not make specifics, but we count on a plus of about 40 HP, makes about 470 HP for the M4 MotoGP Safety coach.
