Side Thrust on Piston Solution

STEP 0: Pre-Calculation Summary
Formula Used
Side thrust on piston = Coefficient of Friction for Piston Skirt*pi*Diameter of Cylinder Bore^2*Maximum Gas Pressure inside Cylinder/4
Fa = μ*pi*Di^2*pmax/4
This formula uses 1 Constants, 4 Variables
Constants Used
pi - Archimedes' constant Value Taken As 3.14159265358979323846264338327950288
Variables Used
Side thrust on piston - (Measured in Newton) - Side thrust on piston is the perpendicular force acting onto the piston perpendicular to the piston central axis.
Coefficient of Friction for Piston Skirt - Coefficient of Friction for Piston Skirt is the ratio of the side thrust on the liner to the maximum gas load on the piston.
Diameter of Cylinder Bore - (Measured in Meter) - Diameter of Cylinder Bore is the internal surface diameter of an engine cylinder.
Maximum Gas Pressure inside Cylinder - (Measured in Pascal) - Maximum gas pressure inside cylinder is the maximum amount of pressure that can be generated inside the cylinder.
STEP 1: Convert Input(s) to Base Unit
Coefficient of Friction for Piston Skirt: 0.1 --> No Conversion Required
Diameter of Cylinder Bore: 180 Millimeter --> 0.18 Meter (Check conversion here)
Maximum Gas Pressure inside Cylinder: 1.43191084 Newton per Square Millimeter --> 1431910.84 Pascal (Check conversion here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Fa = μ*pi*Di^2*pmax/4 --> 0.1*pi*0.18^2*1431910.84/4
Evaluating ... ...
Fa = 3643.76926618707
STEP 3: Convert Result to Output's Unit
3643.76926618707 Newton -->3.64376926618707 Kilonewton (Check conversion here)
FINAL ANSWER
3.64376926618707 3.643769 Kilonewton <-- Side thrust on piston
(Calculation completed in 00.004 seconds)

Credits

Created by Saurabh Patil
Shri Govindram Seksaria Institute of Technology and Science (SGSITS ), Indore
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8 Piston Skirt Calculators

Length of Piston Skirt given Allowable Bearing Pressure
Go Length of Piston Skirt = Coefficient of Friction for Piston Skirt*pi*Diameter of Cylinder Bore*Maximum Gas Pressure inside Cylinder/(4*Bearing Pressure for Piston Skirt)
Side Thrust on Piston
Go Side thrust on piston = Coefficient of Friction for Piston Skirt*pi*Diameter of Cylinder Bore^2*Maximum Gas Pressure inside Cylinder/4
Length of Piston Skirt given Side Thrust
Go Length of Piston Skirt = Side thrust on piston/(Bearing Pressure for Piston Skirt*Diameter of Cylinder Bore)
Side Thrust on Piston Skirt
Go Side thrust on piston = Bearing Pressure for Piston Skirt*Diameter of Cylinder Bore*Length of Piston Skirt
Total Length of Piston
Go Length of Piston = Width of Top Land+Length of Ring Section of Piston+Length of Piston Skirt
Minimum Length of Piston Skirt
Go Length of Piston Skirt = 0.65*Diameter of Cylinder Bore
Maximum Length of Piston Skirt
Go Length of Piston Skirt = 0.8*Diameter of Cylinder Bore
Maximum Total Length of Piston
Go Length of Piston = 1.5*Diameter of Cylinder Bore

Side Thrust on Piston Formula

Side thrust on piston = Coefficient of Friction for Piston Skirt*pi*Diameter of Cylinder Bore^2*Maximum Gas Pressure inside Cylinder/4
Fa = μ*pi*Di^2*pmax/4

Piston Skirt

The cylindrical portion of the piston between the last scrapper ring and the open end is called the piston skirt. The piston skirt acts as a bearing surface for the side thrust. The length of the skirt should be such that the bearing pressure due to side thrust is restricted to 0.2 MPa on the projected area. In high-speed engines, the bearing pressure up to 0.5 MPa is allowed to reduce the weight of the reciprocating piston. The maximum side thrust will occur during the expansion stroke.

How to Calculate Side Thrust on Piston?

Side Thrust on Piston calculator uses Side thrust on piston = Coefficient of Friction for Piston Skirt*pi*Diameter of Cylinder Bore^2*Maximum Gas Pressure inside Cylinder/4 to calculate the Side thrust on piston, Side thrust on piston is the force acting perpendicular onto the sidewalls of a piston. Side thrust on piston is denoted by Fa symbol.

How to calculate Side Thrust on Piston using this online calculator? To use this online calculator for Side Thrust on Piston, enter Coefficient of Friction for Piston Skirt (μ), Diameter of Cylinder Bore (Di) & Maximum Gas Pressure inside Cylinder (pmax) and hit the calculate button. Here is how the Side Thrust on Piston calculation can be explained with given input values -> 0.003596 = 0.1*pi*0.18^2*1431910.84/4.

FAQ

What is Side Thrust on Piston?
Side thrust on piston is the force acting perpendicular onto the sidewalls of a piston and is represented as Fa = μ*pi*Di^2*pmax/4 or Side thrust on piston = Coefficient of Friction for Piston Skirt*pi*Diameter of Cylinder Bore^2*Maximum Gas Pressure inside Cylinder/4. Coefficient of Friction for Piston Skirt is the ratio of the side thrust on the liner to the maximum gas load on the piston, Diameter of Cylinder Bore is the internal surface diameter of an engine cylinder & Maximum gas pressure inside cylinder is the maximum amount of pressure that can be generated inside the cylinder.
How to calculate Side Thrust on Piston?
Side thrust on piston is the force acting perpendicular onto the sidewalls of a piston is calculated using Side thrust on piston = Coefficient of Friction for Piston Skirt*pi*Diameter of Cylinder Bore^2*Maximum Gas Pressure inside Cylinder/4. To calculate Side Thrust on Piston, you need Coefficient of Friction for Piston Skirt (μ), Diameter of Cylinder Bore (Di) & Maximum Gas Pressure inside Cylinder (pmax). With our tool, you need to enter the respective value for Coefficient of Friction for Piston Skirt, Diameter of Cylinder Bore & Maximum Gas Pressure inside Cylinder and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Side thrust on piston?
In this formula, Side thrust on piston uses Coefficient of Friction for Piston Skirt, Diameter of Cylinder Bore & Maximum Gas Pressure inside Cylinder. We can use 1 other way(s) to calculate the same, which is/are as follows -
  • Side thrust on piston = Bearing Pressure for Piston Skirt*Diameter of Cylinder Bore*Length of Piston Skirt
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