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Engineering Students' Engine Homework

This document provides the instructions for Homework #1 for an internal combustion engines course. It includes 5 problems related to engine components, describing a favorite engine, comparing fuel injection systems, discussing emissions regulations, and drawing valve timing diagrams. Students are asked to write multi-paragraph responses for most problems and cite any references used. The homework is due on February 3rd and additional resources can be used to complete the assignment.

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Mason Cherry (GOAT134)
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75 views2 pages

Engineering Students' Engine Homework

This document provides the instructions for Homework #1 for an internal combustion engines course. It includes 5 problems related to engine components, describing a favorite engine, comparing fuel injection systems, discussing emissions regulations, and drawing valve timing diagrams. Students are asked to write multi-paragraph responses for most problems and cite any references used. The homework is due on February 3rd and additional resources can be used to complete the assignment.

Uploaded by

Mason Cherry (GOAT134)
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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MEEN 410, SECTION 500

INTERNAL COMBUSTION ENGINES

MEEN 611, SECTION 600


ADVANCED INTERNAL COMBUSTION ENGINES

Spring 2021
Homework #1
DUE February 3, 2021

NOTE: YOU MAY USE ADDITIONAL RESOURCES, SUCH AS THE INTERNET,


AUTO MAGAZINES, AND JOURNAL ARTICLES TO COMPLETE THIS ASSIGN-
MENT. CHAPTER 1 AND CHAPTER 2 NOTES WILL HELP YOU WITH THIS AS-
SIGNMENT

1. (20 points). Select a single engine component, such as: Cylinder head, cylinder block, piston, piston
rings, connecting rod, crankshaft, valves, intake and exhaust manifolds, injection system, or some
other component. Describe its function, materials, and recent design trends for passenger car engine
applications. Please type and limit your answer to two paragraphs, and cite your references.

2. (25 points). Select your favorite engine (could be a classic from the ‘60s, a modern production
engine, a formula car engine, or the engine in your car) and describe the features of the engine in
light of the course material. Please provide and / or describe the following in a type-written answer
(cite your references):
a. Engine geometrical specifications (displacement, bore, stroke, compression ratio)
b. Basic engine design (# of cylinder, block design, cam location, number of valves)
c. Engine power specifications (rated specifications, speed and torque curves)
d. Method of breathing
e. Type of working cycle
f. Type of fuel
g. Mixture preparation used
h. Method of ignition
i. Combustion chamber design (head design, piston design, spark location, etc)
j. Method of load control

3. (20 points). Port fuel injection (PFI) systems have replaced carburetors and throttle body injectors
in automotive spark-ignition engines. List the major advantages of multi-point PFI systems relative
to those older fuel-air mixture preparation systems. Briefly discuss problems associated with port
fuel injection, and the advantages that gasoline direct injection (GDI) systems promise over PFI
systems.

4. (15 points). The 1970 Clean Air Act and 1990 Clean Air Act Amendments give authority to the
Environmental Protection Agency to regulate automobile emissions of carbon monoxide (CO),
unburned hydro-carbons (HC), oxides of nitrogen (NOx), and particulate matter (PM). In no
more than two para-graphs, summarize the impact that each species has in the atmosphere and on
human health.

5. (20 Points). Draw the timing events determined for your favorite engine from Problem #2 on a
valve event timing diagram (similar to that shown in Chapter 1 of the notes). Clearly identify in-
take valve opening, intake valve closing, exhaust valve opening, and exhaust valve closing. Also
identify piston TDC and piston BDC. Finally, identify intake stroke, compression stroke, com-
bustion/expansion stroke, and exhaust stroke. NOTE: you may hypothesize your own timing
events if you’re not able to determine them for your favorite engine.

a. After drawing the valve event timing diagram for your engine, proceed to draw a second dia-
gram that possesses negative valve overlap. Make a brief comment (one or two sentences) as
to why you might want to have negative valve overlap for your engine.

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