4) A small single-cylinder, two stroke cycle SI engine operates at 800 RPM with a volumetric efficiency of 0.85. The engine is square (bore=stroke) and has a displacement of 6.28 (cm³ ). The fuel-air ratio FA=0.067. Determine: a) Average piston speed (m/ s) b) Flow rate of air into engine (kg/s) c) Flow rate of fuel into engine (kg/s) d) Fuel input for one cycle (kg/cycle)

4) A small single-cylinder, two stroke cycle SI engine operates at 800 RPM with a volumetric efficiency of 0.85. The engine is square (bore=stroke) and has a displacement of 6.28 (cm³ ). The fuel-air ratio FA=0.067. Determine: a) Average piston speed (m/ s) b) Flow rate of air into engine (kg/s) c) Flow rate of fuel into engine (kg/s) d) Fuel input for one cycle (kg/cycle)

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

1. An 11.1 liter, 6 cylinder, 4 stroke engine has a 120 mm bore and 125 mm stroke. If its compressions ratio is 16, what is the clearance volume? What is the engine displacement per minute if it runs at 2,000 rpm? If biogas, with an energy content of 4,500 Kcal/m3 will be fueled into the engine, what would be its power output (in KW) considering a 10% brake thermal efficiency?
Q.) A six-cylinder diesel engine has the following performance details: 1) work done during expansion = 900kW. 2) work done during suction= 70 kW, 3) work losses due to friction=220 kW. If the brake mean effective pressure is 0.8 MPa. Determine the bore and stroke of the engine taking the ratio bore to stroke equal to 1 and engine specd as 1200 rpm.
3. A rear mounted air-cooled SI engine has 6 cylinders, 3.375 in x 2.6 in bore and stroke respectively, acompression ratio of 8 and developed 80 BHP at 4400 rpm. It was noted that brake thermal efficiency is26 %, volumetric efficiency is 74 % and mechanical efficiency is 71 %. For the ideal cycle, conditions atthe start of compression are 14.7 psia, 140 o F.Calculate a) Percent clearance, b) P, T at the end of compression, c) Brake engine efficiency, d) massflow rate of air, e) torque (lb-ft), f) AF with Q hv = 19100 BTU/lb fuel
B) Why A two stroke cycle engine gives double the number of power strokes as compared to the four stroke cycle engine, at the same engine speed.
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).
P4.22). A single-cylinder four-stroke-cycle spark-ignition engine operating at 3500 rpm has a brake mean effective pressure of 1800 kPa and a displacement of 400 cm'. Atmospheric conditions are 101 kPa and 27°C. a) If the stroke is 6 cm, what is the bore? b) What is the brake power? c) If the mass air-fuel ratio is 16 and the fuel flow rate is 0.00065 kg/s, what is the volumetric efficiency? d) Compare your results with the performance of a two-cylinder engine with the same overal l geometric characteristics.
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).
What is the engine speed (in rpm) required for good volumetric efficiency for a square engine with one inlet and one exhaust valve, bore of 0.086 m, inlet air temperature of 327 K, exhaust temperature of 875 K and exhaust valve diameter 31.9 mm. Assume specific heat ratio =1.32, R = 287 J/kg.K, an average inlet flow coefficient 0.37 and an average exhaust flow coefficient 0.47. Select one: a. 7150 b. 7800 c. 5620 d. 8640 e. 9200
The world’s largest diesel engine has displacement of 25 m3 running at 300 RPM in a two-stroke cycle producing 100 000 hp. Assume an inlet state of 300 kPa, 300 K and a compression ratio of 20:1. a)What is the mean effective pressure? b)The flow of air to the engine?
5. How many times the intake valve opens in a 4-stroke-cycle engine running at 2000 rpm. 6. If the compression ratio is 1:17, the clearance volume for 100 cm3 piston displacement volume is ___. 7. If a 4-cylinder, 2-stroke-cycle internal combustion engine has 600 explosion per minute, what is the engine rpm?
A diesel engine has a compression ratio ol 17 and cut-off take place at 10% of the stroke. Assuming ratio of specific heats (y) as 1.4, the air-standard efficiency (in percent) is 1) 55 to 58 3) 62 to 64 2) 58 to 62 4) 64 to 66 13
2.) 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 rc = %3D 18:1. (a) engine displacement in cm³, (b) brake mean effective pressure in kPa, (c) torque in N-m, (d) clearance volume of one cylinder in cm³.