In some American countries for a long time even offered E85 - and bought. Recently, moreover, in Sweden. Cars for these markets are especially prepared: Everything that comes into contact with the fuel must be from the alcohol can. The tank must be higher, because ethanol has less energy content. The fuel pump needs more fuel and is therefore designed to promote greater.
It gets even added a requirement: As it can in these countries is no nationwide offer E85, and the deals vary in time, the car must also make do with lower ethanol or methanol content and even use pure gasoline. The fuel pump must therefore depend the alcohol content, promote more or less.
The amount of fuel and ignition timing must be adjusted depending on the alcohol content. To make this all could be controlled, had an appropriate alcohol sensor to be invented. This consists of an electrical capacitor, its capacitance changes depending on alcohol content. He is a co-invention of Siemens, Daimler and Volkswagen. Meanwhile, the alcohol content can also be determined from the exhaust gas, the oxygen sensor can make today.
The ethanol ratio always remains below 100% because a pure alcohol Difficult starting. So when you mix a minimum of fuel, so that the car starts cold.
Furthermore, as the weekend has been the head of BMW mechanics developer announced, the engine oil to the alcohol content of the fuel to be adjusted. And at the end of the chain and the catalyst.
This flexible or multi-fuel capability is perhaps eventually called up? For the car manufacturer a conversion to ethanol or methanol is much cheaper than the development of hybrid and electric drives. However, as already reported this morning, the CO2 balance of the ethanol used very specifically. As long as we grow extra food for gewpnnen is hardly anything. What
but from above it may already suspect, the compatibility of alcohol in the car has developed a purely be. The compatibility must apply long term. It should not come to life shortening of the motor or increased wear.
the way Brazil has experienced some turbulence with the acceptance and the availability of its original E85. First, there were strong incentives. Then, the demand grew so strong, because people switch to ethanol engines, ethanol that Brazil had to buy abroad. The price rose and demand fell again. You can tell you is what a high standard of our supply of gasoline and diesel strictly defined places. Our engines are highly optimized in this country to these specifications.
What bugs me on the issue is that I have every two years, an attack of ward policy needs to take to drive my car may continue. And this despite all the laws and regulations to bring anything: My car does not emit particulate matter increased (because there is no diesel), but I had endless running around the green because of the badge. Then came E5 and I had to search again. Now comes E10, which brings the price structure in motion again, with upward trend.
Sources: Wikipedia , Volkswagen
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