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The document outlines calculations related to engine performance for various engine configurations, including displacement volume, mean piston speed, and volumetric flow rates. It includes specific details for a 4-cylinder engine, a 6-cylinder engine, a V6 pickup truck engine, and a 4-cylinder engine with specified parameters. Each section provides formulas and variables necessary for performing the calculations.

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faroukelrweny26
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18 views1 page

Sheet 1

The document outlines calculations related to engine performance for various engine configurations, including displacement volume, mean piston speed, and volumetric flow rates. It includes specific details for a 4-cylinder engine, a 6-cylinder engine, a V6 pickup truck engine, and a 4-cylinder engine with specified parameters. Each section provides formulas and variables necessary for performing the calculations.

Uploaded by

faroukelrweny26
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Sheet 1

Engine Performance

1. A 4-cylinder, 4-stroke engine has a bore of 90 mm and a stroke of 85 mm. It runs at 4800 rpm
with a volumetric efficiency of 80%. Calculate:
a. The displacement volume in liters.
b. The mean piston speed in m/s.
c. The ideal volumetric flow rate of air in both m³/h and liters/min.
2. A 6-cylinder, 4-stroke engine has a bore of 85 mm and a stroke of 80 mm. It operates at 2400
rpm with a volumetric efficiency of 82%. Determine:
a. The displacement volume in liters.
b. The mean piston speed in m/s.
c. The ideal volumetric flow rate of air in both m³/h and liters/min.
d. The actual mass flow rate of air in kg/min, given that the air conditions are 90 kPa
and 310 K.
3. A pickup truck has a 5.0-liter, V6, SI engine running at 2400 RPM. The compression ratio is
10.2:1, and the volumetric efficiency is 91%. The bore and stroke are related by the equation S =
0.92B, and the air-fuel ratio (A/F) is 15. Calculate:
a. The stroke length in cm.
b. The average piston speed in m/s.
c. The clearance volume of one cylinder in cm³.
d. The air flow rate into the engine in kg/s.
4. A 4-cylinder, 2.4-liter engine operates on a 4-stroke cycle at 3200 rpm. The compression ratio is
9.4, and the connecting rod length is 18 cm. The bore and stroke are related by S = 1.06B.
Calculate:
a. The clearance volume of one cylinder in cm³ and in liters.
b. The bore and stroke in cm.
c. The mean piston speed in m/s.

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