Hi Paul,

  Google this turbocompounding F1. Click on the choose the second
 post down call Engine tech turbocompounding post. Then click on the
 lower right icon to expand it.

  Doug

 I wonder if his professor knows about this :)

 http://www.rotaryeng.net/Oxford-640-4802.wmv

 My presentation on turbo compound presented at the 2008 World
 Motorsport Symposium in Oxford UK.

 Paul Lamar

 I would like to point out some errors in the PDF.

 "Turbocompounding was first used in the 1950s on aircraft engines.
  The most successful application was on the Wright R-3350, an 18-
  cylinder radial engine with a displacement of 54.9 litres powering
 military aircraft, most notably the Canadair CL-28, the Lockheed P2V-
 7 and the Fairchild C-119.  The fuel mass flow into the engine
 translated into a 5,650 hp input of FIGURE 2 Mechanical
 turbocompound on a turbocharged engine which only 1,680 hp resulted
 in engine power and a significant 2,915 hp or 51.6% was released
 into the exhaust.  Exhaust energy recovery was therefore paramount
 and the implementation of turbocompounding increased the engine
 output by 160 hp."

 This is incorrect.  Probably a misinterpretation of the data I
 presented at the World Motor Sport Symposium. Possibly the recovered
 HP from one of three turbines.

 The max HP went from 2700 HP non turbo compound in 1946 to 3600
 turbo compound in 1951. An increase of 900 HP or 33%.

 The most significant turbo compounds truck engine was left out.

 "The best examples are the Cummins and Scania engines that power
 many of the freight FIGURE 3 Electric turbocompound on a
 turbocharged engine transport trucks.  In these applications, the
 aim is to reach a certain power output at a lower rpm and hence
 reduce fuel consumption.  The first successful application was on
 the Cummins NTC-400, a turbocharged six-cylinder diesel engine with
 a displacement of 14 litres that produced 400 hp at 2,100 rpm.
 Turbocompounding the engine resulted in a decrease in fuel
 consumption of about 27 g/kW.h over the operating range.  Other
 manufacturers such as Caterpillar and John Deere are known to have
 worked on electric turbo compounds for their engines."

 The best turbo compound truck engine so far is Detroit Diesel DD15.

 Paul Lamar


 Detroit Diesel also has a smaller displacement version in the DD13 and a
larger displacement version in the DD16. These have different HP ranges with
some overlap of power coverage.

Dale Davies


-- 
The Rotary Engine News Letter. Powered by Linux.
ACRE NL web site. http://www.rotaryeng.net
You Tube key word PaulLamar2
Copyright 1998-2012 All world wide rights reserved.