News on Ford's forthcoming ethanol injected, turbocharged "Bobcat" V8

[cpu]

[align=center]





[/align]

Pickuptrucks.com has been doing some digging in the U.S. Department of Energy's document treasure trove and uncovered some information on Ford's new Bobcat (no, not the Mercury). It turns out "Bobcat" is the code name for a new boosted and ethanol-powered engine being developed in Dearborn.

The Bobcat engine is a new 5.0-liter V8 with gasoline port injection and turbocharging. A second set of direct injectors is used to feed a small amount of ethanol directly to the cylinders. The ethanol is used primarily for charge cooling, allowing the engine to run at higher boost and compression levels. It also allows the engine to run much leaner. Normally, running lean causes higher combustion temperatures, thus increasing production of NOx. However, the ethanol helps to alleviate the NOx by reducing combustion temperatures, and according to the data, Ford has been able to increase the brake mean effective pressure (BMEP) of a prototype E85 DI V6 engine from the standard 17 BAR to about 27 BAR.

BMEP is a measure of specific output of an engine independent of displacement. That BMEP of 27 BAR in a 3.5-liter V6 translates to a torque output of 553 lb-ft. Compare this to 350 lb-ft from a standard 3.5-liter Ecoboost and you know good things are on the way. Specifically, the 5.0-liter Bobcat can produce over 500 hp and 750 lb-ft of torque. That's the kind of torque number typically associated with big diesel engines and handily beats the 650 lb-ft of the 6.4-liter diesel currently offered in the Super Duty pickups.

The beauty of this particular ethanol boosting is that it can potentially offer better-than-diesel performance and efficiency without the expensive particulate filter and urea injection systems. If the concept can be scaled down effectively to smaller displacement engines, it could be the next step beyond the Ecoboost engines coming over the next couple of years.

Click the above image to read more.



SIDE NOTES

Did I hear them say ethanol...........

Ethanol fuel is ethanol (ethyl alcohol), the same type of alcohol found in alcoholic beverages. It can be used as a fuel, mainly as a biofuel alternative to gasoline, and is widely used by flex-fuel light vehicles in Brazil, and as an oxygenate to gasoline in the United States. Together, both countries were responsible for 89 percent of the world's ethanol fuel production in 2008. Because it is easy to manufacture and process and can be made from very common crops such as sugar cane and corn, in several countries ethanol fuel is increasingly being blended as gasohol or used as an oxygenate in gasoline. Bioethanol, unlike petroleum, is a renewable resource that can be produced from agricultural feedstocks.

Anhydrous ethanol (ethanol with less than 1% water) can be blended with gasoline in varying quantities up to pure ethanol (E100), and most modern gasoline engines will operate well with mixtures of 10% ethanol (E10). Most cars on the road today in the U.S. can run on blends of up to 10% ethanol,[3] and the use of 10% ethanol gasoline is mandated in some cities.

Ethanol can be mass-produced by fermentation of sugar or by hydration of ethylene (ethene CH2=CH2) from petroleum and other sources. Current interest in ethanol mainly lies in bio-ethanol, produced from the starch or sugar in a wide variety of crops, but there has been considerable debate about how useful bio-ethanol will be in replacing fossil fuels in vehicles. Concerns relate to the large amount of arable land required for crops, as well as the energy and pollution balance of the whole cycle of ethanol production. Recent developments with cellulosic ethanol production and commercialization may allay some of these concerns.

According to the International Energy Agency, cellulosic ethanol could allow ethanol fuels to play a much bigger role in the future than previously thought. Cellulosic ethanol offers promise as resistant cellulose fibers, a major and universal component in plant cells walls, can be used to generate ethanol.


Yeah yeah I know, but I was in a tech mood tonight. ;16