Hi “IVYMILKE”
Yes I will appreciate if you will talk to your boss.
Enclosed is an introduction doc’ that I have prepared in past.
I also have two recommendation letters for my idea which were given by professors in mechanical engineering but I could not attached them since it is in picture format and the sys’ does not excepts this kind of format. If you will contact me via my direct address (which is on the attached doc) I’ll be happy to sand it to you (and your boss if he will be interested in the idea).
Thanks
Dan Nahoom
Address in USA
1154 S. Barrington Ave.Los Angeles Ca. 90049Phone: (w) 310 643-5300 ext 170 (h) 310- 479-0084E mail: dnahoom@aurasystems.com
Performance improvement of internal combustion engine
This is an abstract of an idea for performance improvement of internal combustion engines by modifying the OTTO Cycle, which is the most common cycle in spark ignition engines, to an ATKINSON Cycle exhibiting a higher thermodynamic efficiency. Although the ATKINSON Cycle was invented more than a century ago, so far it has not been implemented due to the complicity of the mechanical arrangement that was suggested at the time.
In the ATKINSON Cycle the piston performs different strokes in order to satisfy the various thermodynamic needs of each working stroke, mainly the expansion stroke and the compression stroke, contrary to the OTTO Cycle where identical strokes are used. The length of the compression stroke is determined primarily by the fuel characteristics allowing the highest pressure and temperature at the end of this stroke, without exceeding the detonation conditions. On the other hand, the expansion stroke must be longer than the compression stroke in order to ensure a complete expansion of the combustion products. Therefore, in the OTTO Cycle, at the end of the expansion stroke, the combustion products are expelled to the atmosphere while still possessing high temperature and pressure, which means energy losses and low efficiency.
A comparison between the OTTO Air Cycle and the ATKINSON Air Cycle shows an advantage in efficiency by 12.7% of the ATKINSON Cycle, with a gas constant value of 1.3 and compression and expansion ratios of 8.3 and 17, respectively. More detailed calculations and simulations, which take into account the combustion process, pumping losses and various working loads show the following results:
OTTO Cycle efficiency ATKINSON Cycle efficiency Improvement %
Low working load 0.359 0.478 33
Medium working load 0.372 0.479 28
Full working load 0.384 0.479 24.7
The present results reflect the development of a mechanical arrangement concept that offers a workable solution for applying the ATKINSON Cycle to internal combustion engines.
The inventor and his idea are available for detailed information on this matter and for creation of the necessary framework to promote and explore the possibilities of the invention for the benefit of all sides involved.
Sincerely Yours
D. Nahoom