Clea ra nce Volume (m^3)
Bore (m)
S troke (m)
Con Rod Length (m)
Engine S peed (RPM)
Bra ke T orque (N-m)
Number of Cylinders
0.000028 108
0.079
0.08 6
0.1335
1500
54 .73
4
Cra nksha ft Position (deg)
ME 438 Fall 2015
EXAM #1
Monday, October 26th, 2015
Open Books and Open Notes
State and justify any assumptions that you make.
SHOW ALL OF YOUR WORK.
The molecular weights of different species can be
ME 438
Fall 2016
Problem Set #2 Solutions
Problem 1 (10 Points)
For a turbocharged, four-stroke diesel engine, derive an equation relating the engine inlet
pressure to the engine load, described by fu
ME 438
Fall 2014
Problem Set #1 Solutions
Question 1 (20/20)
Engine components:
1.
2.
Functional description should indicate a fairly in-depth understanding of how the part
works. When you read it, if
ME 438
Fall 2014
Problem Set #4
State and justify any assumptions that you make
Problem 1 (40 Points)
An inventor has proposed a modern manifestation of an Atkinson cycle engine concept to
control eng
ME 438
Lab 3 Solutions
Fall 2014
Abstract (4 Pt)
The goal of this experiment is to investigate the impact of changing equivalence ratio or spark timing on
an SI engines performance. A series of experi
ME 438
Fall 2014
Problem Set #1
1.
(20 points) Select a single engine component, such as:
Cylinder head, cylinder block, piston, piston rings, connecting rod, crankshaft, valves,
intake and exhaust ma
ME 438
Fall 2014
ENGINE LABORATORY 1
FAMILIARIZATION WITH MODERN MULTI-CYLINDER ENGINE TESTS AND
MEASURED PERFORMANCE CHARACTERISTICS
Introduction
The objective of this lab is to introduce students to
ME 438
Fall 2014
Problem Set #4 Solutions
Problem 1 (40 Points)
An inventor has proposed a modern manifestation of an Atkinson cycle engine concept
to control engine load without throttling and thus a
ME 438
Fall 2016
Problem Set #2
1. (10 Points) For a turbocharged, four stroke diesel engine, derive an equation relating the
engine power to the inlet pressure and engine load, described by fuel/air
ME 438
Fall 2014
Homework 5 Solutions
Problem 1
m f 0.15 g sec
Tair Tfuel 298 K
Wout 1.0 kW
Tburn 700 K
(a)
Dry Basis
CO2 = 11.4%, O2 = 1.6%, CO = 2.9%, N2 = 84.1%
aC8 H18 bO2 hN2 cCO2 dO2 eCO fH 2O g
ME 438
Fall 2014
Problem Set #2 Solutions
Problem 1 (10 Points)
For a turbocharged, four-stroke diesel engine, derive an equation relating the engine inlet
pressure to the engine load, described by fu
ME 438
Fall 2016
Homework 5 Solutions
Problem 1
m f 0.15 g sec
Tair T fuel 298 K
= 0.9
= 650
(a)
Dry Basis
CO2 = 12.1%, O2 = 1.8%, CO = 2.1%, N2 = 84.0%
aC8 H18 bO2 hN2 cCO2 dO2 eCO fH 2O gN2
c =
ME 438
Lab 3 Solutions
Fall 2015
Abstract
The goal of this experiment is to investigate the impact of changing equivalence ratio or spark timing on
an SI engines performance. A series of experiments w
ME438, Fall 2014
Lab #1 Solutions
At constant speed (Fig. 3 Fig. 5):
A) (5 points) Why do the brake torque and BMEP curves have the same shape? Use
equations from the Chapter 2 of the lecture notes to
ME 438
Fall 2015
Problem Set #4 Solutions
Problem 1 (40 Points)
An inventor has proposed a modern manifestation of an Atkinson cycle engine concept
to control engine load without throttling and thus a
ME 438
Fall 2014
Problem Set #3 Solutions
Question 1
(30 points) The performance of a given diesel engine is approximated by the limited
pressure cycle. The compression ratio of the engine is 16 and t
ME 438
Fall 2016
Problem Set #4 Solutions
Problem 1
a)P-V diagram
b) T1
We are given the following information:
f= 0.3 (first iterate)
Ti = 300 K
Te = 1000 K (first iterate)
Pi = 100 kPa
Pe = 100 kPa
ME 438
Fall 2014
Problem Set #3
1. (30 points) The performance of a given diesel engine is approximated by the limited
pressure cycle. The compression ratio of the engine is 16 and the total heat adde
ME 438
Fall 2014
Problem Set #2
1. (10 Points) For a turbocharged, four stroke diesel engine, derive an equation relating the
engine power to the inlet pressure and engine load, described by fuel/air
ME 438 Fall 2014
Homework #6 Solutions
Problem 1 (60 points total)
Limited Pressure Cycle
The peak pressure will always fall in between the constant volume and constant pressure limits.
The following
ME 438
Fall 2014
Problem Set #5
1. A gasoline engine operates steadily on a mixture of isooctane and air. The air and fuel enter
the engine at 25 C. The fuel consumption is 0.15 g/s. The output of the
Thermodynamics Review 1
1
Ideal Gas Law
Based on experimental observation at low density
pv RT
1.
where p=pressure, v=specific volume, T=temperature, R=gas constant
Low density N2 obeys the ideal gas
Thermodynamics Review 2
TR2 - 1
Review of Last Review
Ideal Gas Law
Important when dealing with gases in internal combustion engines
A simplifying assumption that can be made most of the time
pv RT
Guidance of Matlab Code for Lab3
A bundle of m-files for Matlab Code are provided to assist the data process
of Lab3. Some parts of the file are intentionally missing. To be able to run it
and process
ME 438
Fall 2017
Problem Set #4
State and justify any assumptions that you make
Problem 1 (40 Points)
An inventor has created an engine design allowing for the combustion of a fuel and air mixture
wit
ME 438
SAMPLE EXAM #1 (FROM 2003)
Open Book- Open Notes
State and justify any assumptions that you make.
1. (50 points). An inventor has proposed a new spark-ignition engine for a planet where H2 fuel
ME 438
Fall 2017
Homework Set #6
For this homework, you will need to employ the cycle simulation software that was developed by
Chris Depcik, a former lecturer for the course. The software can be down
ME 438
Fall 2017
Problem Set #5
0
1. A gasoline engine operates steadily on a mixture of isooctane ,
= 259,280 kJ / kmol
3 8
air is not standard air (3.76 moles N2 per mole O2). The air and fuel enter
ME 438
Fall 2017
ENGINE LABORATORY 1
FAMILIARIZATION WITH MODERN MULTI-CYLINDER ENGINE TESTS AND
MEASURED PERFORMANCE CHARACTERISTICS
Introduction
The objective of this lab is to introduce students to