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A spark ignition four-stroke cycle engine operates on an air-s tandard Miller cycle with no supercharger, and early intake valve closing (cycle 6-7-1-7-2-3-4-5-6 in Fig 15). Compres- sion ratio is 8.2 and expansion ratio is 10.2. Cylinder conditions when the intake valve clos- es are T, = 57°C and P, 100 kPa. Maximum temperature and pressure in the cycle are Tmax = 3427 C and Pmas = 9197 k Pa. Calculate: (a) Minimum cylinder pressure during cycle. [kPa] (b) Pump work for one cylinder for one cycle. [kJ] (c) Pressure in cylinder when exhaust valve opens [kPa]

A spark ignition four-stroke cycle engine operates on an air-s tandard Miller cycle with no supercharger, and early intake valve closing (cycle 6-7-1-7-2-3-4-5-6 in Fig 15). Compres- sion ratio is 8.2 and expansion ratio is 10.2. Cylinder conditions when the intake valve clos- es are T, = 57°C and P, 100 kPa. Maximum temperature and pressure in the cycle are Tmax = 3427 C and Pmas = 9197 k Pa. Calculate: (a) Minimum cylinder pressure during cycle. [kPa] (b) Pump work for one cylinder for one cycle. [kJ] (c) Pressure in cylinder when exhaust valve opens [kPa]

Elements Of Electromagnetics
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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A spark ignition four-stroke cycle engine operates on an air-standard Miller cycle with no supercharger, and early intake valve closing (cycle 6-7-1-7-2-3-4-5-6 in Fig 15). Compres- sion ratio is 8.2 and expansion ratio is 10.2. Cylinder conditions when the intake valve clos- es are T, = 57°C and P, = 100 kPa. Maximum temperature and pressure in the cycle are Tmux = 3427°Cand Pmas = 9197 k Pa. Calculate: (a) Minimum cylinder pressure during cycle. [kPa] (b) Pump work for one cylinder for one cycle. [kJ] (c) Pressure in cylinder when exhaust valve opens [kPa]
Transcribed Image Text:A spark ignition four-stroke cycle engine operates on an air-standard Miller cycle with no supercharger, and early intake valve closing (cycle 6-7-1-7-2-3-4-5-6 in Fig 15). Compres- sion ratio is 8.2 and expansion ratio is 10.2. Cylinder conditions when the intake valve clos- es are T, = 57°C and P, = 100 kPa. Maximum temperature and pressure in the cycle are Tmux = 3427°Cand Pmas = 9197 k Pa. Calculate: (a) Minimum cylinder pressure during cycle. [kPa] (b) Pump work for one cylinder for one cycle. [kJ] (c) Pressure in cylinder when exhaust valve opens [kPa]
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