A 1500cm³, four-stroke, four cylinder CI engine operating at 3000rpm produces 48kW ofbrake power. Volumetric efficiency is 0.92 and air-fuel ratio AF=21:1Calculate: (Show your solution)a. Rate of air flow into the engine (kg/sec)b. Break specific fuel consumption (gm/kW-hr)c. Break output per displacement (kW/I)

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Answered: A 1500cm³, four-stroke, four cylinder…

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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bore and stroke of the fuel pump. 2. A 4-cylinder, 4-stroke, diesel engine, has the following parameters: brake power 100 hp, engine speed = 25 r.p.s, b.s.f.c. = 213 g/kW.hr, fuel density = 0.85 g/cm³, a = 1.2, and z = 1.25. Calculate: (i) Volume of fuel injected for one cylinder. (ii) Bore and stroke of the fuel pump. 3. A 4-stroko
At this speed, the volumetric efficiency of the engine is 92%, Apa 0.07 bar, C, 0.85, C = 2. A four-stroke, 6-eylinder, 3.6 Itr SI engine, is designed to have a maximum speed of 6000 F-p. a 0.6, fuel density = 700 kg/m'. At sea level the air temperature and pressure are 27°C and 1 bar réspectively, and AF 15. Caleulate: (i) Throat diameter of the carburetor. (i1) Fuel ome !! area. (iii) AF at altitude of 3000 m.
2. A four-cylinder 2.5 L spark-ignited engine is mounted on a dyno and operated at a speed of W=3000 rpm. The engine has a compression ratio of 10:1 and mass air--fuel ratio of 15:1. The inlet air manifold conditions are 80 kPa and 313 K. The engine produces a torque of 160 Nm and has a volumetric efficiency of 0.82. (a) What is the brake power Wb (kW)? (b) What is the brake specific fuel consumption bsfc (g/kWh)?
3 litters, 4 cylinders engine, multipoint port fuel injection, one for each cylinder. AF ratio is 14.6, the volumetric efficiency is 90%. The engine speed at idle condition is 550 rpm with stoichiometric gasoline and inlet pressure is 30 kPa. But the engine speed is 5900 rpm with stoichiometric gasoline of maximum power, the inlet pressure is 101 kPa. Calculate the following: a. mass air flow rate in one cylinder at maximum speed, b. mass fuel flow rate into one cylinder through an injector, c. mass air flow into one cylinder at idle speed, d. mass fuel flow rate into one cylinder at idle speed, e. injection pulse duration is seconds at idle conditions at idle, f. injection pulse duration is degrees of engine rotation at idle conditions.
(e) Calculate the angular velocity of the gas mixture sing paddle wheel model of two- cylinder engine by assuming swirl ratio is 11. Use the following data: i. air to fuel ratio 8.8 ii. compressiom ratio-7.2 ii, volunetric efficiency77 iv. indicated thermal efficiency 33 v. mechanical efficiency55 vi. brake power 62000 j/sec vii. engine volmne 1000 cm3 vi. calorific value 45000 kj/m
Calculate the percentage loss in the ideal efficiency of a diesel engine withcompression ratio 14 if the fuel cut-off is delayed from 5% to 8%
5. For a 6-cylinder, 4-stroke, diesel engine, the following data is available: brake power = 120 hp, engine speed = 2500 rpm, b.s.f.c. = 240 g/kW.hr. Determine the fuel pump size. Assume: fuel density 0.85 g/cm³, a = 1.2, and co-efficient of excess fuel is (1.25).
1- A four-cylinder, two stroke cycle diesel engine with (10.9 cm) bore and (12.6 cm) stroke produces (88 kW) of brake power at (2000 RPM). Compression ratio is (18:1). Determine: (a) Engine displacement. Ans.: (4700.6 cm³). (b) Brake mean effective pressure. Ans.: (561.7 kPa).
A power generator with two-cylinder, four-stroke gas engine has a bore of480 mm and a stroke of 585 mm. At 300 rev/min the torque developed is10 kNm. The generator is supplied with a mixture of gas and air in theproportion of 1 to 8 by volume. The estimated volumetric efficiency is 80% and the net calorific values of the fuel is 48.6 MJ/m3. Calculate: 1. the swept volume in m3/min, 2. the volume of mixture induced in m3/min 3. the gas flow to engine m3/min4. the energy supplied by gas5. the brake thermal efficiency
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3.1 A 3 liters S.I. V6 engine that operates on a four-stroke of 3000 revolution per minute, the compression ratio is 10, the lengths of the connecting rod and the crank offset are 15 cm and 4 cm respectively, the combustion is completed at 35° of the crankshaft rotation after I need an answer as soon as possible, and I hope it will be clear. Greetings, my bro. TDC, the engine is running with the stoichiometric air-fuel ratio, mechanical efficiency 90%. If the engine is connected to a dynamometer which its reading of 100 kW. Calculate: 1-piston speed at end of the combustion, 2-volume of the combustion chamber at end of the combustion, 3-engine torque, 4- indicated mean effective pressure and 5-break specific fuel consumption.
The Fifth Question: A six-cylinder, 4-stroke petrol engine develops 62 H.P at 3000 r.p.m. The volumetric efficiency at N.T.P. is 85%. The bore is equal to the stroke and thermal efficiency of 25 % may be assumed. Calorific value of petrol is 44100 kj/kg. Air-fuel ratio is to be 15:1. Calculate the cylinder bore and stroke.

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