3. (a) A 3200c.c. Spark Ignition (SI) V6 engine operates on a four stroke cycle at 7800RPM. The engine compression ratio is 9.2, the length of the connecting rod is 15.6cm, and the engine has a bore/stroke ratio of 1.7. At this speed, combustion ends at 34° ATDC. Calculate: i Cylinder bore and stroke length. ii Average piston speed 12 iii Clearance volume of one cylinder. (b) The same engine is connected to a dynamometer which gives a brake output torque reading of 175Nm at 7800 RPM. At this speed, air enters the cylinders at 80kPa and 65°C, and the me- chanical efficiency of the engine is 80%. Calculate: i Brake power ii Indicated power iii Brake mean effective pressure iv Indicated mean effective pressure u
3. (a) A 3200c.c. Spark Ignition (SI) V6 engine operates on a four stroke cycle at 7800RPM. The engine compression ratio is 9.2, the length of the connecting rod is 15.6cm, and the engine has a bore/stroke ratio of 1.7. At this speed, combustion ends at 34° ATDC. Calculate: i Cylinder bore and stroke length. ii Average piston speed 12 iii Clearance volume of one cylinder. (b) The same engine is connected to a dynamometer which gives a brake output torque reading of 175Nm at 7800 RPM. At this speed, air enters the cylinders at 80kPa and 65°C, and the me- chanical efficiency of the engine is 80%. Calculate: i Brake power ii Indicated power iii Brake mean effective pressure iv Indicated mean effective pressure u
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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Problem 1.1MA
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please send handwritten solution Q3 part b iv
![3. (a) A 3200c.c. Spark Ignition (SI) V6 engine operates on a four
stroke cycle at 7800RPM. The engine compression ratio is 9.2,
the length of the connecting rod is 15.6cm, and the engine has
a bore/stroke ratio of 1.7. At this speed, combustion ends at 34°
ATDC. Calculate:
i Cylinder bore and stroke length.
ii Average piston speed
iii Clearance volume of one cylinder.
(b) The same engine is connected to a dynamometer which gives
a brake output torque reading of 175Nm at 7800 RPM. At this
speed, air enters the cylinders at 80kPa and 65°C, and the me-
chanical efficiency of the engine is 80%. Calculate:
i Brake power
ii Indicated power
iii Brake mean effective pressure
iv Indicated mean effective pressure
v Friction mean effective pressure
vi Power lost to friction.
Im](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe3b36e93-6510-484b-8b39-13b1503b5605%2Ff712b42c-da14-4329-a33d-f8d30e94fae4%2Fxuamw8y_processed.jpeg&w=3840&q=75)
Transcribed Image Text:3. (a) A 3200c.c. Spark Ignition (SI) V6 engine operates on a four
stroke cycle at 7800RPM. The engine compression ratio is 9.2,
the length of the connecting rod is 15.6cm, and the engine has
a bore/stroke ratio of 1.7. At this speed, combustion ends at 34°
ATDC. Calculate:
i Cylinder bore and stroke length.
ii Average piston speed
iii Clearance volume of one cylinder.
(b) The same engine is connected to a dynamometer which gives
a brake output torque reading of 175Nm at 7800 RPM. At this
speed, air enters the cylinders at 80kPa and 65°C, and the me-
chanical efficiency of the engine is 80%. Calculate:
i Brake power
ii Indicated power
iii Brake mean effective pressure
iv Indicated mean effective pressure
v Friction mean effective pressure
vi Power lost to friction.
Im
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