ICE-1
SINGLE-CYLINDER FOUR-STROKE DIESEL
ENGINE TEST RIG
Objective:
To study the performance of a single cylinder four stroke diesel engine.
Aim:
To determine
 Brake power
 Fuel consumption
 Specific fuel consumption
 Brake thermal efficiency
 Swept volume
 Air consumption
 Volumetric efficiency
Description:
Test rig consists of:
1. Single Cylinder, Four Stroke, Kirloskar diesel engine,
2. Eddy Current Dynamometer with Loading Unit,
3. Fuel Consumption measuring arrangement,
4. Air intake measuring arrangement.
Single-Cylinder Diesel Engine:
A medium capacity Kirloskar diesel engine is selected for experimental purposes. The specification
for the Engine is as follows:
Engine
:
Single cylinder, 4 stroke, water cooled.
Bore diameter
:
87.5mm
Stroke
:
110mm
Fuel Input Measuring Arrangement:
Consist of self-mounting type fuel tank of about 15 liters capacity suitably mounted on a stand. The
stand is fixed on the air tank and fuel goes from the reservoir to fuel filter through a burette. The burette
facilitates the measurement of the fuel consumption for a definite period of time with the help of a
stopwatch.
Air Intake Measuring Arrangement:
Test rig consists air tank fitted with an orifice plate having diameter of 20mm. Inclined manometer is
used to measure the flow rate of air sucked by the engine. The co-efficient of discharge of orifice is
about 0.67.
ME 441- Internal Combustion Engine Lab
Specification:
Engine
:
Single cylinder, 4-stroke, water-cooled
Type
:
Stationary, Vertical 4-stroke, Direct Injection
Bore diameter (D)
:
87.5 mm
Stroke
:
110 mm
Dynamometer Arm Length (r)
:
185 mm
Orifice diameter (do)
:
20 mm
Compression Ratio
:
17.5:1
Rated power
:
5.2 kW @1500 rpm
(L)
Formula:
Brake Power (BP):
𝐵𝑃 =
2𝜋𝑁×(𝑊×9.81×𝑟)
60000
kW
Fuel Consumption (Wf)
X f f
Wf 
t 106 kg/sec
Specific Fuel Consumption (SFC)
SFC 
Wf
BP
kg / kW sec
Heat Supplied By Fuel (H f)
H f  W f  CV kW
Brake Thermal Efficiency (bt )
bt 
BP
100 %
Hf
Actual Air Consumption (Qa)
Qa  Cd  ao  (2  g  H ) m3 / sec
H
where...….
h  sin   m

100
a m
Theoretical Air Consumption (Qt),
ME 441- Internal Combustion Engine Lab
Qt  Vs 
N  Nc
60  n
m3 / s
where…..
Swept Volume (Vs)
V s

4
D2L
m3
Volumetric Efficiency ( vol )
vol 
Qa
 100
Qt
Observation & Calculation:
Data:
Nc = 1 (single cylinder)
n = 2 (for 4 stroke)
do = 0.02 m
ao = ____________ m 2
C d = 0.67
 a = 1.21 kg / m3
 m = 1000 kg / m 3
g = 9.81 m / s 2
CV = 41900 kJ / kg
 f = 810 kg / m 3
N =______________ rpm (crankshaft).
Volume of Diesel consumed =
ml
Observation Table:
Sr. No.
1.
2.
3.
4.
Load W (kg)
Time to consume Xf fuel (sec)
h (cm)
ME 441- Internal Combustion Engine Lab
Calculation:
Sr. No.
1
2
3
4
BP (kW)
Fuel consumption Wf (kg / sec)
Specific fuel consumption (kg / kW sec)
Heat supplied by fuel Hf (kW)
Brake thermal efficiency bt (%)
Air consumption Qa (m3 / sec)
Swept volume Vs (m3 / sec)
Volumetric efficiency  vol (%)
Graphs:
a) SFC vs. Load
b) Break Power Efficiency vs. Load
c) Volumetric Efficiency vs. Load
Results & Discussion:
ME 441- Internal Combustion Engine Lab