B/A six-cylinder, four-stroke oil engine operates on A/F ratio = 20. The diameter andstroke of the cylinder are 100 mm and 140 mm respectively. The volumetric efficiency is80 percent. The condition of air at the beginning of compression are 1 bar, 27° C. (i)Determine the maximum amount of fuel that can be injected in each cylinder per second.(ii) If the speed of the engine is 1500 r.p.m., injection pressure is 150 bar, air pressureduring fuel injection is 40 bar and fuel injection is carried out for 20° crank angle,determine the diameter of the fuel orifice assuming only one orifice is used. Take, pr=860kg/m³; Cr=0.67.

Given Data: Air -Fuel ratio = 20 Diameter d =100mm =0.1m stroke L = 140 mm = 0.14m volumetric…

Answered: B/A six-cylinder, four-stroke oil…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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John’s automobile has a three-liter SI-V6 engine that operates on a four-stroke cycle at 3600 RPM. The compression ratio is 9.5, the length of connecting rods is 16.6 cm, and the engine is square (B=S). at this speed, combustion ends at 20o at T.D.C. This engine is connected to Dynamometer which gives a brake output torque reading of 205 N-m. At his speed, air enters the cylinders at 85 kPa and 60o C, and the mechanical efficiency of the engine is 85%. Calculate: (a) Brake power, HP || (b) Indicated Power, HP || (c) Brake Mean Effective Pressure, Bmep , Psia || (d) Indicated Mean Effective Pressure, Imep, Psia || (e) Friction Mean Effective Pressure, Fmep, Psia
2. A compression ignition engine draws in air at a pressure of 1.75 bar (abs) and compresses it adiabatically into the clearance volume before the fuel is injected. The stroke volume is 4.04 m³ and the clearance volume is 2.004 m³. Calculate: a. The pressure at the end of compression b. the final temperature, given an initial temperature of 30°C c. the compression ratio of the engine. Bonus: Based on the numbers given above is this a logical problem in an automobiles engine or is this a purely hypothetical question?
The displacement volume of an internal combustion engine is 2.22 liters. The processes within each cylinder of the engine are modeled as an air-standard Diesel cycle with a cutoff ratio of 2.5. The state of the air at the beginning of compression is fixed byp1= 1.6 bar, T1 = 325 Kand V1 = 2.36 liters. If the cycle is executed 2100 times per min, determine: a) the compression ratio, b) the net work per cycle, in kJ, c) the maximum temperature, in K, d) the power developed by the engine, in kW, e) and the thermal efficiency. Step 1 Determine the compression ratio. r = i Save for Later Attempts: 0 of 1 used Submit Answer Step 2 The parts of this question must be completed in order. This part will be available when you complete the part above. Step 3 The parts of this question must be completed in order. This part will be available when you complete the part above. Step 4 The parts of this question must be completed in order. This part will be available when you complete the part above.…
The displacement volume of an internal combustion engine is 2.15 liters. The processes within each cylinder of the engine are modeled as an air-standard Diesel cycle with a cutoff ratio of 2.5. The state of the air at the beginning of compression is fixed by p1 = 1.6 bar, T1 = 325 Kand V1 = 2.36 liters. If the cycle is executed 2100 times per min, determine: a) the compression ratio, b) the net work per cycle, in kJ, ) the maximum temperature, in K, d) the power developed by the engine, in kW, e) and the thermal efficiency.
8. A 6-cylinder, 4-stroke SI engine with a bore of 125 mm and a stroke of 190 mm was supplied during a test with gasoline of composition C = 82% and H2 = 18% by mass. The dry exhaust composition by volume was CO2 = 11.19%, O2 = 3.61% and N2 = 85.2%. a. Determine the mass of air supplied per kg of fuel, the percentage of excess air and the volume of the mixture per kg of fuel at 17 C and 0.98 bar, which are the conditions for the mixture entering the cylinder during the test. b. Also determine the volumetric efficiency of the engine based on intake conditions when mass of fuel used per hour during the test was 31 kg and the engine speed was 1600 rpm. The fuel is completely evaporated before entering the cylinder and the effect of its volume on the volumetric efficiency should be included Assume the following: Density of petrol vapour as 3.35 times that of air at the same temperature and pressure. 1 kg of air at 0°C and 1.0132 bar occupies 0.7734 m3. Air contains 23% oxygen by mass.
In a 4 Stroke petrol Engine, during a Compression Stroke Select one: O a. Inlet valve is open and Exhaust Valve is closed O b. Inlet valve is closed and Exhaust Valve is closed O c. Inlet valve is closed and Exhaust Valve is open O d. Inlet valve is open and Exhaust Valve is open
8.6 A six cylinder diesel engine produces 100 kW at 1500 rpm. The specific fuel consumption of the engine is 0.3 kg/kW h. Each cylinder has a separate fuel pump, injector and pipe line. At the beginning of effective plunger stroke of one fuel pump, the fuel in the pump barrel is 4 cc, fuel inside the injector is 2 cc and fuel in the pipe line is 3 cc. If the average injector pressure is 300 bar and average pressure of charge during injection is 40 bar, calculate the displacement volume of one plunger per cycle and power lost in pumping fuel to the engine (for all cylinders). Specific gravity of fuel is 0.9 and the fuel enter the pump barrel at 1 bar. Coefficient of compressibility of fuel may be taken as 80 x 10-6 per bar.
A2. A four-cylinder, 1.6 litre, spark ignition automotive engine operates at wide open throttle on a four-stroke air-standard Otto cycle. The engine has a compression ratio of 8.3 and a stroke-to-bore ratio of 1.093. At the start of the compression stroke, conditions inside the cylinder are 1 bar and 333 K. Determine the following quantities: a) Bore, stroke and clearance volume per cylinder. b) Temperature and pressure at the end of the compression stroke. c) Peak cylinder temperature and pressure, if the heat addition is 900 kJ/kg. d) Net work output per cylinder, mean effective pressure and engine power output, assuming an engine speed of 1800 rev/min. e) If this engine is converted to work on a diesel air-standard cycle with the same compression ratio and initial conditions, comment on the thermal efficiency of the two cycles with the help of a P-V diagram. For air use the following values of specific heat at costant pressure and specific gas constant: Cp = 1005 J/kgK; R = 287…
At the beginning of the compression process of air-standard Diesel cycle operating with a compression ratio of 18, the temperature is 300 K and the pressure is 0.1 MPa. The cut-off ratio for the cycle is 2 and the mass flow rate in the system is 1900 kg/hr. Cp= 1.006 kJ/kg K Cv= 0.717 kJ/kg K 1) which figure represents the diagram for the process 2) which formula should be used to determine the temperature after compression? 3) calculate the temperature after isentropic compression in the presentable unit 4)which formula should be used to determine the temperature after heating? 5) calculate the temperature after isentropic compression in the presentable unit? 6) calculate the temperature after isentropic expansion in the presentable unit? 7) calculate the pressure after compression in kPa ? 8) which formula should be used to determine the work output of the engine? 9) calculate the work output of the engine kW? 10) calculate the thermal efficiency of the cycle in %? 11) which…
The displacement volume of an internal combustion engine is 2.15 liters. The processes within each cylinder of the engine are modeled as an air-standard Diesel cycle with a cutoff ratio of 2.5. The state of the air at the beginning of compression is fixed by p1 = 1.6 bar, T1 = 325 K and V1 = 2.36 liters. If the cycle is executed 2100 times per min, determine: a) the compression ratio,b) the net work per cycle, in kJ,c) the maximum temperature, in K,
Q/ An dual combustion cycle has an adiabatic compression ratio of 15:1. The conditions at the commencement of compression are 1 bar, 25C° and 0.1 m². The maximum pressure of the cycle 65bar and the maximum temperature of the cycle is 1500C°. If cv =0.718 and k=1.4. Calculate the pressure, volume and temperature at the corners of the cycle and the thermal efficiency of the cycle.
At the beginning of the compression process of air-standard Diesel cycle operating with a compression ratio of 18, the temperature is 300 K and the pressure is 0.1 MPa. The cut-off ratio for the cycle is 2 and the mass flow rate in the system is 1900 kg/hr. Cp=1.006 kJ/kg K Cv= 0.717 kJ/kg K 1) which formula should be used to determine the temperature after heating 2) calculate the temperature after isentropic compression in the presentable unit? 3) calculate the temperature after isentropic expansion in the presentable unit?

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