Final Report Guidelines Analysis of GM A20DTH 2.0 liter Diesel Engine

ME343 Fall 2017 The production of a final document at the end of an engineering project is, typically, the most important piece of work of the whole project. No matter how thorough and innovative the engineering, if the final report is incomplete, poorly organized, and/or sloppy in language and appearance, the quality of the entire effort is called into question. Thus, the effort you put into the preparation of your final report will make or break the project. Your analysis of the GM Chevy Cruse diesel engine will be perhaps the most challenging project many of you have undertaken to date, and your final report should reflect your personal professionalism and be your "showpiece" for the project. As an additional incentive, your grade for the project, which will depend on the quality of the work as reflected in your team report, is a significant part (~ 40%) of your overall course grade. Final report guidelines In writing any report you need to know who your intended audience is. This determines the technical level and depth of the presentation, its emphasis, and perspective. A report written for someone very familiar with your project, for example, may require less background material and a less thorough description of apparatus and procedures. For this report you are to assume that your target audience is a professional mechanical engineer who is knowledgeable about diesel engines and thermodynamic cycles, but does not know anything about your project. This is a suggested outline. You may modify or add to it as you see fit. The bottom line criterion is that your report must be coherent, complete, and professional in its content and appearance. You should ask yourself: “Is this work of a quality that I would be willing to show a recruiter or potential employer?” Title Page: (space your text attractively over the first page)

"Simulation of the General Motors A20DTH Ecoflex 2.0 liter Turbodiesel Light-Duty Passenger Car Engine"

Submitted in partial fulfillment of the requirements for ME 343 Thermal-Fluid Systems by

(names of team members). Department of Mechanical Engineering

University of Texas at Austin Date

Table of Contents: List major sections only Executive Summary: Overall summary of work done and results obtained (on 1 page,

single spaced)

Section 1: Introduction (all of the text in the body of your report should be double

spaced for ease of reading) A. Introduction to the project and project objectives.

B. Overview of sections that follow. List them and give brief statement of what's in each section. Each section should start with its own introductory statement about the contents of that section.

The introduction should be approximately 4-6 pages double-spaced, providing an overview discussing the characteristics and applications of modern small direct-injection light-duty diesel engines. Be sure to carefully reference all sources of information. Including a technical description discussing the advantages/features of engines of this type (pictures are always good).

Section 2: NOX and particulate emissions by diesel engines, and their regulation and control:

Investigate the general subject of NOX production and particulate emissions by diesel engines. Prepare a brief (4-6 pages double-spaced) background section on NOX and particulate regulations and control strategies for diesel engines.

Section 3: Description of the GM 2.0 liter Diesel Engine

Present a physical description of the actual engine and overview of its features, including specifications from manufacturer's data.

Section 4: Formulation of computer model

A. Schematic diagrams, algorithms, assumptions, equations, data; sources (handouts, reprints, etc. in Appendix)

B. Calculation procedures (including values of heat transfer coef. Co and friction coef. C1) This is to include a description of the Property Calculator you used. This section is probably the most difficult and time consuming part of the report if

done correctly. You need to show more than just equations; it should be a readable description of how your model works, but with little or no reference to the computational details of the Matlab program.

Section 5: Five Case studies of GM 2.0 liter Turbodiesel Engine A. Results and Discussion Show Phase 2 results for the following five cases:

1. Full-load conditions as provided in the Phase II model description 2. Part-load conditions as provided in the Phase II model description 3. Effect of inlet temperature: [T1 = 20, 40, 80oC] at full load (other parameters same)

4. Effect of Altitude for full-load: [sea level, 5000 ft (Denver)]. Maintain the same

pressure-ratio across the compressor, with other parameters the same. 5. Effect of fuel fraction burned at constant volume vs. constant pressure. Run full-load

case with 30% of fuel burned at constant volume and 70% at constant pressure. Adjust the heat loss terms proportionally in the same way.

Include a table with your model-derived temperatures and pressures for each point in the cycle, 1-6 for 5.0, 11.3, and 23.1 bar bmep at 2000 rpm. Also include in this table the corresponding GM data for only one of these conditions: 2000 rpm/11.3 bar bmep (available values including peak pressure). Plots for Cases 1 & 2, Full-load and Part-load conditions with comparisons with experimental data where available. You are to decide whether to show the full-load and part-load plots combined or separately and the order in which you will present the plots below. All temperatures in oC.

• Fuel/air equivalence ratio vs. rpm • Co * (N/2000)-.2 vs rpm (fractional heat loss to coolant) • Brake power (kW) and compressor power (kW) vs rpm • To vs rpm • Peak cylinder pressure P3 and Torque (N m) vs rpm • Thermal efficiency:

ηTH vs rpm • Brake specific fuel consumption: BSFC (g/kW h) vs rpm • Ratio of friction power to brake power vs rpm • Engine exhaust temperature, T5 and turbo exhaust temperature T6’ vs rpm • T3 and T4 vs rpm • upstream turbine pressure P6 vs rpm • Cutoff ratio (V4/V3) vs rpm

Plots for Cases 3, 4, & 5, varying inlet temperature and altitude and fuel fraction burned at const. vol. vs. const. pressure for Phase 2 Model.

• Brake power (kW) vs rpm B. Properly title each case C. For each task include: 1) Rationale and description 2) Inputs and assumptions 3) Results 4) Discussion and comparison with GM test data where possible

Section 6: Brief discussion comparing results of Phase1 and Phase 2 models For example, brake power and thermal efficiency, perhaps exhaust temperature.

Section 7: Conclusions and recommendations A. Summary of observations from case studies

B. Discussion of what you’ve learned from this project C. Recommendations regarding future implementation of this project References Appendices Final Report Grading Guide