2 - A 6 cylinder petrol engine operates on the 4-stroke cycle (Otto cycle), cylinder bore (70 mm), and piston stroke (100 mm). The clearance volume per cylinder is (67 cm³). At a speed of (3960 rpm) the fuel consumption is (19.5 kg/hr) and the torque developed is ((140 Nm). The calorific value of fuel is 43884kj/kg Calculate: i – brake power ii – bmep iii – brake thermal eff. iv – relative eff. On brake power basis - [answer: 58 kW ,7.61x10°, 24.4%, 45.7%]
2 - A 6 cylinder petrol engine operates on the 4-stroke cycle (Otto cycle), cylinder bore (70 mm), and piston stroke (100 mm). The clearance volume per cylinder is (67 cm³). At a speed of (3960 rpm) the fuel consumption is (19.5 kg/hr) and the torque developed is ((140 Nm). The calorific value of fuel is 43884kj/kg Calculate: i – brake power ii – bmep iii – brake thermal eff. iv – relative eff. On brake power basis - [answer: 58 kW ,7.61x10°, 24.4%, 45.7%]
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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Question
![2 - A 6 cylinder petrol engine operates on the 4-stroke cycle (Otto cycle), cylinder bore (70
mm), and piston stroke (100 mm). The clearance volume per cylinder is (67 cm³). At a speed of
(3960 rpm) the fuel consumption is (19.5 kg/hr) and the torque developed is ((140 Nm). The
calorific value of fuel is 43884kj/kg Calculate:
i- brake power
ii – bmep
iii – brake thermal eff.
iv – relative eff. On brake power basis
[answer: 58 kW , 7.61x105, 24.4%, 45.7%]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5981cc1f-c923-4103-9825-e5a9318d1bc4%2F4326e4db-70c7-419c-83df-9123580225fb%2F2a21si_processed.jpeg&w=3840&q=75)
Transcribed Image Text:2 - A 6 cylinder petrol engine operates on the 4-stroke cycle (Otto cycle), cylinder bore (70
mm), and piston stroke (100 mm). The clearance volume per cylinder is (67 cm³). At a speed of
(3960 rpm) the fuel consumption is (19.5 kg/hr) and the torque developed is ((140 Nm). The
calorific value of fuel is 43884kj/kg Calculate:
i- brake power
ii – bmep
iii – brake thermal eff.
iv – relative eff. On brake power basis
[answer: 58 kW , 7.61x105, 24.4%, 45.7%]
![6 – The brake power of a single cylinder engine is defined by the relation
BP = 9.75 (N/1000)3
Where (N) is the engine speed in (rpm), the bore and stroke are (80 , 130) mm respectively. If
the engine speed is (1200) rpm, and the mechanical efficiency is (80%), (3.2) kg of fuel of CV
(43500 kJ/kg) is consumed during (30 min) Calculate:
i- Brake power
ii- Brake thermal eff.
iii-imep
iv- [answer: 16.84 kw , 21.77%, 32.24bar]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5981cc1f-c923-4103-9825-e5a9318d1bc4%2F4326e4db-70c7-419c-83df-9123580225fb%2Fvwxba87_processed.jpeg&w=3840&q=75)
Transcribed Image Text:6 – The brake power of a single cylinder engine is defined by the relation
BP = 9.75 (N/1000)3
Where (N) is the engine speed in (rpm), the bore and stroke are (80 , 130) mm respectively. If
the engine speed is (1200) rpm, and the mechanical efficiency is (80%), (3.2) kg of fuel of CV
(43500 kJ/kg) is consumed during (30 min) Calculate:
i- Brake power
ii- Brake thermal eff.
iii-imep
iv- [answer: 16.84 kw , 21.77%, 32.24bar]
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