A six-cylinder 4-stroke cycle petrol engine is to be designed to develop 250 kW of (b.p) at 2200 rpm the stroke / bore ratio is to be 1.3:1. Assuming nm =80% and an indicated mean effective pressure of 9.5 bar, determine the required bore and stroke. If the compression ratio of the engine is to be 7.5 to 1, determine consumption of petrol in kg/h and in kg/bp.hr. Take the ratio of the indicated thermal efficiency of the engine to that of the constant volume air standard cycle as 0.65 and the calorific value of the petrol as; 44770KJ/kg.
A six-cylinder 4-stroke cycle petrol engine is to be designed to develop 250 kW of (b.p) at 2200 rpm the stroke / bore ratio is to be 1.3:1. Assuming nm =80% and an indicated mean effective pressure of 9.5 bar, determine the required bore and stroke. If the compression ratio of the engine is to be 7.5 to 1, determine consumption of petrol in kg/h and in kg/bp.hr. Take the ratio of the indicated thermal efficiency of the engine to that of the constant volume air standard cycle as 0.65 and the calorific value of the petrol as; 44770KJ/kg.
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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Transcribed Image Text:1 The following observations are recorded during a test on a
four-stroke petro engine, F.C = 25cc of fuel in 10 sec,
speed of the engine is 2600 rpm, B.P = 22 kW, Qair
0.00134 m, piston diameter
90 mm, density of the fuel = 0.85gm/cc , compression
ratio = 7.5, CV of fuel = 42000KJ/Kg, room temperature
= 24 °C
%3D
= 140mm, stroke length =
%3D
%3D
%3D
2 A six-cylinder 4-stroke cycle petrol engine is to be designed
to develop 250 kW of (b.p) at 2200 rpm the stroke / bore
ratio is to be 1.3:1. Assuming nm =80% and an indicated
mean effective pressure of 9.5 bar, determine the
required bore and stroke. If the compression ratio of the
engine is to be 7.5 to 1, determine consumption of petrol
in kg/h and in kg/bp.hr. Take the ratio of the indicated
thermal efficiency of the engine to that of the constant
volume air standard cycle as 0.65 and the calorific value
of the petrol as; 44770KJ/kg.
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