11.2 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 C/H ratio by mass 83/17 Coefficient of discharge 0.6 Ambient pressure = 1 bar Pressure drop across orifice 14.5 cm of Hg Time taken for 100 cc of fuel consumption 20 8 Ambient temperature 27 °C Fuel density 831 kg/m³ ||||

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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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
measur ed by an air box with sharp edged orifice system. The following
readings are obtained.
11.2
Orifice diameter
30 mm
%3D
Bore
100 mm
Stroke
120 mm
Brake load
C/H ratio by mass
Coefficient of dischar ge
Ambient pressure
Pressure drop across orifice
Time taken for 100 cc of fuel consumption
Ambient temperat ure
Fuel density
560 N
%3D
83/17
0.6
1 bar
14.5 cm of Hg
20 s
%3D
27°C
831 kg/m3
%3D
532
IC Engines
Caleulate (i) the brake power (ii) the torque (iii) the brake specific fuel
colisumption (iv) the percentage of excess air and (v) the wolumetric
efficiency
I| || || || |||
Transcribed Image Text: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 measur ed by an air box with sharp edged orifice system. The following readings are obtained. 11.2 Orifice diameter 30 mm %3D Bore 100 mm Stroke 120 mm Brake load C/H ratio by mass Coefficient of dischar ge Ambient pressure Pressure drop across orifice Time taken for 100 cc of fuel consumption Ambient temperat ure Fuel density 560 N %3D 83/17 0.6 1 bar 14.5 cm of Hg 20 s %3D 27°C 831 kg/m3 %3D 532 IC Engines Caleulate (i) the brake power (ii) the torque (iii) the brake specific fuel colisumption (iv) the percentage of excess air and (v) the wolumetric efficiency I| || || || |||
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