COMSATS Institute of Information Technology Sahiwal
Lab Report
Subject:
Mechanical Lab VII
IC Engines And Control Engineering
Submitted To:
Mr. Zafar Farooq
Submitted By:
Abdul Basit
SP12-BME-048
Batch 04
Grade:______________.
Checked by: .
Department of Mechanical Engineering
, INDEX
Sr. Experiment Page
No. No.
INTERNAL COMBSTION ENGINES
1 To calculate volumetric efficiency of four stroke Diesel Engine. 03
2 Demonstration on four stroke I.C. engine. 06
To establish the heat balance equation in diesel combustion unit.
3 08
4 To calculate Brake Mean Effective Pressure of four stroke Diesel Engine. 10
5 To demonstrate the four stroke Spark Ignition I.C. Engine. 12
6 To draw the pressure and crank angle diagram of four stroke Diesel 15
Engine.
To calculate the specific fuel consumption of diesel engine and the air fuel
7 18
ratio of diesel engine.
CONTROL ENGINEERING
1 Determine the characteristics of differential transformer as position 21
transducer.
2 Determine the characteristics of thermo resistance as position transducer. 23
3 Determine the characteristics of pressure transducer. 25
4 To maintain constant the level in the tank using SOL VALVE for the 27
water inlet.
5 To understand the operation of a closed loop ON/OFF control system. 30
6 To verify the effects of the gain of the loop on the dynamic response of the 35
system.
7 To Study the PH value control apparatus. 24
2
, EXPERIMENT NO. 1
Objective:
To calculate volumetric efficiency of four stroke Diesel Engine
Figure 1-1: Diesel Engine Test bed
Apparatus:
Diesel Engine Test bed
Introduction:
Volumetric efficiency in internal combustion engine refers to the efficiency with which engine
can take charge in and out of cylinder. This quantity also shows the amount of air trapped in
cylinder at the end of exhaust stoke. The volumetric efficiency can be increased if forced
induction systems are used e.g. in race cars.
The volumetric efficiency formula is:
Where
And
( ) √
, And
Procedure:
1. Setup the apparatus according to the apparatus manual.
2. Start the engine and hold the accelerator at fixed position.
3. Now measure differential pressure, mass flow intake of air, power output, torque and
engine speed.
4. Run the computer software given by manufacturer to record pressure crank angle
diagram.
5. Repeat the same experiment three-five times at different engine parameters.
Observations and Calculations:
Table 1.1: Observations
Sr. Pambient Engine speed Power out
∆P
No. (Pa) (rpm) (W)
1 -65 100600 1050 711
2 -115 100600 1550 1125
For this particular engine following parameters are fixed:
Table 1.2: Engine parameters
Parameter Value
Cd 0.6
D 0.0185m
Engine Capacity 172cc
Table 1.3: Calculations
Calculated volume
Sr. No. Measured volume x10-6(m3) Volumetric Efficiency
x10-5(m3)
1 1.89 3.5 67 %
2 2.79 3.8 71 %
4
Lab Report
Subject:
Mechanical Lab VII
IC Engines And Control Engineering
Submitted To:
Mr. Zafar Farooq
Submitted By:
Abdul Basit
SP12-BME-048
Batch 04
Grade:______________.
Checked by: .
Department of Mechanical Engineering
, INDEX
Sr. Experiment Page
No. No.
INTERNAL COMBSTION ENGINES
1 To calculate volumetric efficiency of four stroke Diesel Engine. 03
2 Demonstration on four stroke I.C. engine. 06
To establish the heat balance equation in diesel combustion unit.
3 08
4 To calculate Brake Mean Effective Pressure of four stroke Diesel Engine. 10
5 To demonstrate the four stroke Spark Ignition I.C. Engine. 12
6 To draw the pressure and crank angle diagram of four stroke Diesel 15
Engine.
To calculate the specific fuel consumption of diesel engine and the air fuel
7 18
ratio of diesel engine.
CONTROL ENGINEERING
1 Determine the characteristics of differential transformer as position 21
transducer.
2 Determine the characteristics of thermo resistance as position transducer. 23
3 Determine the characteristics of pressure transducer. 25
4 To maintain constant the level in the tank using SOL VALVE for the 27
water inlet.
5 To understand the operation of a closed loop ON/OFF control system. 30
6 To verify the effects of the gain of the loop on the dynamic response of the 35
system.
7 To Study the PH value control apparatus. 24
2
, EXPERIMENT NO. 1
Objective:
To calculate volumetric efficiency of four stroke Diesel Engine
Figure 1-1: Diesel Engine Test bed
Apparatus:
Diesel Engine Test bed
Introduction:
Volumetric efficiency in internal combustion engine refers to the efficiency with which engine
can take charge in and out of cylinder. This quantity also shows the amount of air trapped in
cylinder at the end of exhaust stoke. The volumetric efficiency can be increased if forced
induction systems are used e.g. in race cars.
The volumetric efficiency formula is:
Where
And
( ) √
, And
Procedure:
1. Setup the apparatus according to the apparatus manual.
2. Start the engine and hold the accelerator at fixed position.
3. Now measure differential pressure, mass flow intake of air, power output, torque and
engine speed.
4. Run the computer software given by manufacturer to record pressure crank angle
diagram.
5. Repeat the same experiment three-five times at different engine parameters.
Observations and Calculations:
Table 1.1: Observations
Sr. Pambient Engine speed Power out
∆P
No. (Pa) (rpm) (W)
1 -65 100600 1050 711
2 -115 100600 1550 1125
For this particular engine following parameters are fixed:
Table 1.2: Engine parameters
Parameter Value
Cd 0.6
D 0.0185m
Engine Capacity 172cc
Table 1.3: Calculations
Calculated volume
Sr. No. Measured volume x10-6(m3) Volumetric Efficiency
x10-5(m3)
1 1.89 3.5 67 %
2 2.79 3.8 71 %
4
