Maximum Suction Pressure on Exhaust Valve Solution

STEP 0: Pre-Calculation Summary
Formula Used
Maximum Suction Pressure = (4*Spring Force on Rocker Arm Valve)/(pi*Diameter of Valve Head^2)
Ps = (4*Psr)/(pi*dv^2)
This formula uses 1 Constants, 3 Variables
Constants Used
pi - Archimedes' constant Value Taken As 3.14159265358979323846264338327950288
Variables Used
Maximum Suction Pressure - (Measured in Pascal) - Maximum Suction Pressure is the amount of pressure generated by the gases during its flow from an obstruction.
Spring Force on Rocker Arm Valve - (Measured in Newton) - Spring Force on Rocker Arm Valve is the force exerted by a compressed or stretched spring upon any object that is attached to it.
Diameter of Valve Head - (Measured in Meter) - Diameter of Valve Head is the diameter of the top part of valve of an IC engine, valve intakes and exhausts gases to and from an engine.
STEP 1: Convert Input(s) to Base Unit
Spring Force on Rocker Arm Valve: 98.5 Newton --> 98.5 Newton No Conversion Required
Diameter of Valve Head: 50 Millimeter --> 0.05 Meter (Check conversion here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Ps = (4*Psr)/(pi*dv^2) --> (4*98.5)/(pi*0.05^2)
Evaluating ... ...
Ps = 50165.6380625654
STEP 3: Convert Result to Output's Unit
50165.6380625654 Pascal -->0.0501656380625654 Newton per Square Millimeter (Check conversion here)
FINAL ANSWER
0.0501656380625654 0.050166 Newton per Square Millimeter <-- Maximum Suction Pressure
(Calculation completed in 00.004 seconds)

Credits

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Shri Govindram Seksaria Institute of Technology and Science (SGSITS ), Indore
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16 Force on Rocker Arm of Valves Calculators

Total Force on Rocker Arm of Exhaust Valve given Suction Pressure
Go Total Force on Rocker Arm of Exhaust Valve = (pi*Back Pressure on Engine Valve*Diameter of Valve Head^2)/4+Mass of Valve*Acceleration of Valve+(pi*Maximum Suction Pressure*Diameter of Valve Head^2)/4
Total Force on Rocker Arm of Inlet Valve given Suction Pressure
Go Total Force on Rocker Arm of Inlet Valve = Mass of Valve*Acceleration of Valve+(pi*Maximum Suction Pressure*Diameter of Valve Head^2)/4
Total Force on Rocker Arm of Exhaust Valve given Bending Moment near Boss of Rocker Arm
Go Total Force on Rocker Arm of Exhaust Valve = Bending Moment in Rocker Arm/(Length of Rocker Arm on Exhaust Valve Side-Diameter of Fulcrum Pin)
Downward Inertia Force on Exhaust Valve given Total Force on Rocker Arm of Exhaust Valve
Go Inertia Force on Valve = Total Force on Rocker Arm of Exhaust Valve-(Spring Force on Rocker Arm Valve+Gas Load on Exhaust Valve)
Initial Spring Force on Exhaust Valve given Total Force on Rocker Arm of Exhaust Valve
Go Spring Force on Rocker Arm Valve = Total Force on Rocker Arm of Exhaust Valve-(Inertia Force on Valve+Gas Load on Exhaust Valve)
Gas Load on Exhaust Valve given Total Force on Rocker Arm of Exhaust Valve
Go Gas Load on Exhaust Valve = Total Force on Rocker Arm of Exhaust Valve-(Inertia Force on Valve+Spring Force on Rocker Arm Valve)
Total Force on Rocker Arm of Exhaust Valve
Go Total Force on Rocker Arm of Exhaust Valve = Gas Load on Exhaust Valve+Inertia Force on Valve+Spring Force on Rocker Arm Valve
Maximum Suction Pressure on Exhaust Valve
Go Maximum Suction Pressure = (4*Spring Force on Rocker Arm Valve)/(pi*Diameter of Valve Head^2)
Back Pressure when Exhaust Valve Opens
Go Back Pressure on Engine Valve = (4*Gas Load on Exhaust Valve)/(pi*Diameter of Valve Head^2)
Initial Spring Force on Exhaust Valve
Go Spring Force on Rocker Arm Valve = (pi*Maximum Suction Pressure*Diameter of Valve Head^2)/4
Gas Load on Exhaust Valve when it Opens
Go Gas Load on Exhaust Valve = (pi*Back Pressure on Engine Valve*Diameter of Valve Head^2)/4
Downward Inertia Force on Valve given Total Force on Rocker Arm of Inlet Valve
Go Inertia Force on Valve = Total Force on Rocker Arm of Inlet Valve-Spring Force on Rocker Arm Valve
Initial Spring Force on Valve given Total Force on Rocker Arm of Inlet Valve
Go Spring Force on Rocker Arm Valve = Total Force on Rocker Arm of Inlet Valve-Inertia Force on Valve
Total Force on Rocker Arm of Inlet Valve
Go Total Force on Rocker Arm of Inlet Valve = Inertia Force on Valve+Spring Force on Rocker Arm Valve
Bending Stress in Rocker Arm near Boss of Rocker Arm given Bending Moment
Go Bending Stress in Rocker Arm = Bending Moment in Rocker Arm/(37*Thickness of Rocker Arm Web^3)
Downward Inertia Force on Exhaust Valve as it Moves Upwards
Go Inertia Force on Valve = Mass of Valve*Acceleration of Valve

Maximum Suction Pressure on Exhaust Valve Formula

Maximum Suction Pressure = (4*Spring Force on Rocker Arm Valve)/(pi*Diameter of Valve Head^2)
Ps = (4*Psr)/(pi*dv^2)

Engine Valve Materials

The inlet valve is subjected to comparatively less temperature than the exhaust valve. Therefore, inlet valves are made of nickel-chromium steel. The exhaust valves are made of heat-resistant silicon–chromium steel. For heavy-duty engines, valves are made of chromium-vanadium steel. The valves are heat treated and surface hardness for inlet and exhaust valves is in the range of 250 to 300 HB.

How to Calculate Maximum Suction Pressure on Exhaust Valve?

Maximum Suction Pressure on Exhaust Valve calculator uses Maximum Suction Pressure = (4*Spring Force on Rocker Arm Valve)/(pi*Diameter of Valve Head^2) to calculate the Maximum Suction Pressure, The Maximum suction pressure on exhaust valve is the amount of pressure generated by the combustion gases when the exhaust valve is opened, this pressure tries to close the valve. Maximum Suction Pressure is denoted by Ps symbol.

How to calculate Maximum Suction Pressure on Exhaust Valve using this online calculator? To use this online calculator for Maximum Suction Pressure on Exhaust Valve, enter Spring Force on Rocker Arm Valve (Psr) & Diameter of Valve Head (dv) and hit the calculate button. Here is how the Maximum Suction Pressure on Exhaust Valve calculation can be explained with given input values -> 5E-8 = (4*98.5)/(pi*0.05^2).

FAQ

What is Maximum Suction Pressure on Exhaust Valve?
The Maximum suction pressure on exhaust valve is the amount of pressure generated by the combustion gases when the exhaust valve is opened, this pressure tries to close the valve and is represented as Ps = (4*Psr)/(pi*dv^2) or Maximum Suction Pressure = (4*Spring Force on Rocker Arm Valve)/(pi*Diameter of Valve Head^2). Spring Force on Rocker Arm Valve is the force exerted by a compressed or stretched spring upon any object that is attached to it & Diameter of Valve Head is the diameter of the top part of valve of an IC engine, valve intakes and exhausts gases to and from an engine.
How to calculate Maximum Suction Pressure on Exhaust Valve?
The Maximum suction pressure on exhaust valve is the amount of pressure generated by the combustion gases when the exhaust valve is opened, this pressure tries to close the valve is calculated using Maximum Suction Pressure = (4*Spring Force on Rocker Arm Valve)/(pi*Diameter of Valve Head^2). To calculate Maximum Suction Pressure on Exhaust Valve, you need Spring Force on Rocker Arm Valve (Psr) & Diameter of Valve Head (dv). With our tool, you need to enter the respective value for Spring Force on Rocker Arm Valve & Diameter of Valve Head and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
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