Also, if anyone is looking for a great paper on the 2.4L turbo engine, the SAE website has on available for purchase/download for $12.00.
It is SAE Technical Paper Series - Number: 2003-01-0410, titled "Turbocharging the Chrysler 2.4L Engine". It is a 378K file that prints out to 9 pages. 7 pages are actually the "meat" of the paper, with 2 being the Cover and the reprint info.
It is written by Garry W. McKissick Jr. and David M Schmidt of DaimlerChrysler Corporation. It includes descriptions of the various component design changes from the NA 2.4L that were contributed from a group of 10 engineers who designed the changed components.
The paper includes the following headings and subheadings:
Abstract
General Engine Description
(with 2.4L Turbo vs NA Power and Torque Graph)
Objectives
New and Redesigned Components
Pistons
Piston Rings
Connecting Rods
Valvetrain
Bearings
Intake Manifold with Manifold Runner Distribution Graph
Oil Pump
Balance Shafts
Lubrication / Coolant Routing
Water Pump - with Impeller illustration and Coolant System Schematic, as well as Turbo vs NA water pump graph showing pump speed to flow
Cylinder Block
Cylinder Head Gasket
Exhaust Manifold / Turbocharger
Cylinder Head Cover (Valve Cover)
Engine Controller
(Gives informative but BRIEF Explainations of the concept of NGC - Next Generation Contoller, ACT and TIP sensor operation, departure from Look-up based to Model-Based programming algorithms, using a Torque-Based boost control objective to give the same torque output; with no affect from ambient conditions such as temp, baro pressure, etc. It also briefly mentions the calibration optimized for premium fuel and how the NGC Controller uses sensors to modify engine operation when lower octain fuel is used.)
Conclusion
(A nice tidbit here "The DaimlerChrysler 2.4L Turbo engine was designed to significantly imorive the performance of the Chrysler PT Cruiser". Further stating "The Horsepower and torque are increased by approximately 43 percent and 51 percent , respectively, over the standard NA engine.")
Acknowledgements
I would like to see if I can get permission from SAE to post the article here, but I am not too hopeful of that outcome. Some of their papers of the same basic byte count cost $59.00 to download, so I guess the $12.00 price was rather cheap.
They also have papers there on many aspects of the PCM: communication protcol, Serial Data Communication Interface (SCI), diag link connector, networking concept, etc. Since some of this info will not be current due to the 2004 PCM changes (and the cost of downloading), I haven't paid to get these..... yet.
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