3. The following data were noted for a four-cylinder, four-stroke engine: Diameter = 101 mm, stroke = 114 mm, speed = 1,600 rpm, fuel consumption = 0.204 kg/min, %3D heating value of fuel = 41,800 kJ/kg. Difference in either side of the brake pulley = 378 N, brake circumference = 3.35 m. Assume mechanical efficiency = 83%. Calculate (i) brake thermal efficiency, (ii) indicated thermal efficiency, (iii) mean effective pressure of cylinder, and (iv) fuel consumption per brake power.

3. The following data were noted for a four-cylinder, four-stroke engine: Diameter = 101 mm, stroke = 114 mm, speed = 1,600 rpm, fuel consumption = 0.204 kg/min, %3D heating value of fuel = 41,800 kJ/kg. Difference in either side of the brake pulley = 378 N, brake circumference = 3.35 m. Assume mechanical efficiency = 83%. Calculate (i) brake thermal efficiency, (ii) indicated thermal efficiency, (iii) mean effective pressure of cylinder, and (iv) fuel consumption per brake power.

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

See similar textbooks

Similar questions

Question Design a 4 cylinder inline, turbo diesel engine to produce 103 kW of brake power at design speed when installed in a Multi-Purpose Vehicle (MPV). The square engine operates on a four stroke cycle and produces 20 bar of maximum brake mean effective pressure (bmep). Average piston speed is 11.5 m/s and bmep at peak power is 14.4 bar. If the decided values of torque position and torque increase are 50% and 28% respectively, determine the: a) bore b) stroke c) displacement d) maximum torque e) engine speed at peak torque as well as f) engine speed at peak power
A fan is listed having the following performance with standard air:Volume discharge : 120m3/sSpeed : 7.0rpsStatic Pressure : 310mm water gageBP Required : 620kWThe system duct will remain the same and the fan will discharge the same volume of 120m3/s of air at 93oC and a barometric pressure of 735mm of Hg, when its speed is 7.0rps. Find the brake power input of the fan and the static pressure required. Provide solutions and schematic diagram.
Prob.2. The following observations were recorded during á test on a single cylinder oil engine – Bore = 300 mm, stroke = 450 mm, speed = 300 r.p.m., i.m.e.p. = 6 bar, net brake load = 1.5 kN, brake drum diameter diameter = 2 cm. %3D 1.8 metres, brake rope Calculate – (i) Indicated power (ii) Brake power
18 The power output of a six cylinder four-stroke engine is absorbed by a water brake for which the law is WN/20000 where the brake load, W is in Newton and the speed, N is in rpm. The air consumption is measured by an air box with sharp edged orifice system. The following readings are obtained. Orifice diameter 30 mm Bore 100 mm Stroke 120 mm Brake load 560 N %3D C/H ratio by mass Coefficient of discharge Ambient pressure Pressure drop across orifice Time taken for 100 cc of fuel consumption Ambient temperature Fuel density 83/17 0.6 %3D 1 bar 14.5 cm of Hg 20 s 27 °C 831 kg/m³ Calculate (i) the brake power (ii) the torque (iii) the brake specific fuel consumption (iv) the percentage of excess air and (v) the volumetric efficiency
Show Complete Solution
An engine of 175 mm bore and 375 mm stroke is governed by hit and miss type governor to 220 rpm. With a fixed setting of the gas supply and ignition advance, indicator diagrams gave the following values of mean effective pressure. Firing, positive loop 5.7 bar, negative loop 0.25 bar; missing negative loop 0.42 bar. When developing 6 kW the explosions were 100 per minute and the gas used was 0.1 m per minute. Calculate the friction power and assuming uniform gas supply per explosion, find the gas consumption per minute at no load.
During a test on a 5-cylinder four-stroke IC diesel engine with a cylinder bore and stroke length of 240 mm and 297 mm respectively, running at 468 r/min, the following results were obtained: Mass on Dynamometer mass hanger (arm length = 0.825 m) 205 kg Indicated mean effective pressure 528 kPa Fuel consumption (with Qnet,v = 39.8 MJ/kg, %3D density = 0.944 kg/l) 6 ml/s Take acceleration due to gravity as 9.81 m per square seconds Calculate the brake thermal efficiency_ _in decimal form to 3decimal places.
You are asked to design a four cylinder four-stroke compression ignition engine for light trucks, which is required to provide a maximum brake torque of (2.000x10^2) Nm at the rated speed of (4.50x10^3) rpm. The bore (B)/stroke (L) ratio is required to be (9.0000x10^-1). Given that the bmep of the engine is assumed to be (1.0000x10^3) KPa, find its stroke (L). The answer should be in the unit of meter with 3 significant figures.
A four-stroke SI engine 0.08 m bore (d), 0.10 m stroke (L), is tested at full throttle at constant speed. The fuel supply is fixed at 0.0011333 kg/s and the spark plugs of the four cylinders are successively short circuited without change of speed, brake torque being correspondingly adjusted. The brake power (bp) measurements are the following:With all cylinders firing = 12.5 kWWith cylinder No. 1 cut off = 9 kWWith cylinder No. 2 cut off = 9.15 kWWith cylinder No. 3 cut off = 9.2 kWWith cylinder No. 2 cut off = 9.1 kWThe lower calorific (or heating value, LCVf) of the fuel is 44100 kJ/kg. The clearancevolume (Vcl) of one cylinder 70.0 x 103 mm3. Determine:(a) Indicated power (ip) of the engine under these conditions.(b) The indicated thermal efficiency (c) The relative efficiency of this engine. (d) Draw schametic diagram
During a test on a 5-cylinder four-stroke IC diesel engine with a cylinder bore and stroke length of 271 mm and 309 mm respectively, running at 507 r/min, the following results were obtained: Mass on Dynamometer mass hanger (arm length = 0.814 m) 221.2 kg Indicated mean effective pressure 321 kPa Fuel consumption (with Qnet,v = 39.8 MJ/kg, density = 0.944 kg/l) 6 ml/s Take acceleration due to gravity as 9.81 m per square seconds Calculate the indicator power to 2 decimal places.
A four-stroke automotive engine has been designed to provide a maximum brake torque of (1.900x10^2) Nm at rated engine speed of (5.200x10^3) rpm. The engine specifications are listed below: Bore and stroke (mm): (7.5000x10^1) x (8.10x10^1) Compression ratio: 11.0: 1 Estimate the maximum brake power the engine will deliver. The answer should be in kW with three significant figures. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer
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).