From:	Jeff Clark
Sent:	Friday, October 22, 2004 3:37 PM
To:	Bill Larch (E-mail); Bob Campbell (E-mail); Cathy Devlin (E-mail); Greg Shank (E-mail); Jeff Clark (E-mail); Jim Gutzwiller (E-mail); Jim Matasic (E-mail); Jim Moritz (E-mail); Jim Wells (E-mail); Ken Goshorn (E-mail); Mark Cooper (E-mail); Michael Minotti (E-mail); Pat Fetterman (E-mail); Riccardo Conti (E-mail); Ron Buck (E-mail); Scott Richards (E-mail); Steve Kennedy (E-mail); Wim Van Dam (E-mail)
Subject:	T-12 Minutes of October 21, 2004
Mack T-12 Task Force Meeting Minutes
October 20, 2004
8:30am, SwRI Bldg. 209 Room 103
San Antonio, TX

Attendance - Jim Matasic, Bob Campbell, Riccardo Conti, Andy Broff, John Haegelin, Tom Franklin, Pat Fetterman, Jim Gutzwiller, Jeff Clark, Scott Richards, Mark Cooper, Ron Buck, Roy Gamez, Jim Moritz

Membership - no changes.

October 15, 2004 TelCon Minutes - approved.

Installation at SwRI - the group took an hour to view SwRI's T-12 cell installation.

Review Operating Parameters/Set Points/Test Procedure - following the installation visit the group began a discussion of operating parameters, stand configuration, and the test procedure. The group reviewed a preliminary procedure (which was the T-10), made changes, noted additional changes to be made by Jeff Clark prior to Draft 1 being issued, and noted areas that will require on-going review. This marked up preliminary version will be distributed to the group (attached with these minutes).

General Comments - Other comments regarding the test are shown below:
 - The egr valve is not necessary for control, it is helpful for start-up. It is closed for start-up and left wide open during operation. The egr is controlled through the use of the vgt and the venturi bypass. There have been no egr valve failures. The vgt is controlled separately from the engine ecm. A precision control pressure regulator is used to manually control the vgt.
 - The transition from phase II from phase I is difficult and has not been automated.
 - Intake manifold temperature control for phase I can be tough and it is dependent on egr coolers not fouling. The experience is that if you get through phase I successfully, you can get throught phase II.
 - The use of glycol in the egr coolant loop was discussed and the general feeling is that labs may go ahead and try anything from process water, water with Pencool, or glycol.  
 - The egr coolers have been fouling on the exhaust side and have been replaced every test. Cleaning methods will be investigated to see if coolers can be reused. The coolers cost $575 each.
 - The engine ecm may have to be sent back to Mack to remove the coolant temperature derate code.
 - The T-11 type ecm is to be used.
 - Venturi voltage averages from SwRI: Phase I - 1.48 and Phase II - 1.28
 - The EGR coolers should be set up in parallel flow.

Questions to be resolved by Mack -
Injector opening pressure specifications - are these necessary and if so, what should they be - Ken Goshorn
Humidity measurements - are these necessary or of interest - Greg Shank
Piston Deposits - are these of any interest - Greg Shank
Procedure Parts List Review - Ken Goshorn
Complete Test Parts List - Ken Goshorn w/ Ron Buck

Hardware Update: 
Modine cooler - labs are being quoted $7400 - $7800. The distributor has been please with the sudden upsurge in business.
New cylinder head assembly - multiple minor changes have been made (rotators location and valve guides). The new complete cylinder head assembly (P/N 732GB3499M2) is to be used.
Parts List - a complete parts list is desired prior to the matrix.

EGR Cleaning Procedure - SwRI will investigate, but it is a possibility that these will be replaced every test.

Ring Wear Measurement Sub-Group Update - no action to report.

Next TelCon/Meeting - a conference call was tentatively for Friday, Oct 29th, at 11:00 am Eastern. 

Regards,

Jeff Clark
Staff Engineer
ASTM Test Monitoring Center
6555 Penn Avenue
Pittsburgh, PA 15206
412-365-1032
412-848-8843 (cell)
jac@astmtmc.cmu.edu