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Back Pressure when Exhaust Valve Opens Formula

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Back Pressure on Engine Valve is the pressure exerted onto the valve when it opens. Check FAQs

P b = \frac{4 \cdot P g}{π \cdot {d v}^{2}}

P_b - Back Pressure on Engine Valve?P_g - Gas Load on Exhaust Valve?d_v - Diameter of Valve Head?π - Archimedes' constant?

Back Pressure when Exhaust Valve Opens Example

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With units

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Here is how the Back Pressure when Exhaust Valve Opens equation looks like with Values.

Here is how the Back Pressure when Exhaust Valve Opens equation looks like with Units.

Here is how the Back Pressure when Exhaust Valve Opens equation looks like.

0.8556 = \frac{4 \cdot 1680}{3.1416 \cdot 50^{2}}

0.8556MPa = \frac{4 \cdot 1680N}{3.1416 \cdot {50mm}^{2}}

0.8556 = \frac{4 \cdot 1680}{3.1416 \cdot 50^{2}}

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Back Pressure when Exhaust Valve Opens Solution

Follow our step by step solution on how to calculate Back Pressure when Exhaust Valve Opens?

FIRST Step Consider the formula

P b = \frac{4 \cdot P g}{π \cdot {d v}^{2}}

Next Step Substitute values of Variables

∴

P b = \frac{4 \cdot 1680N}{π \cdot {50mm}^{2}}

Next Step Substitute values of Constants

∴

P b = \frac{4 \cdot 1680N}{3.1416 \cdot {50mm}^{2}}

Next Step Convert Units

∴

P b = \frac{4 \cdot 1680N}{3.1416 \cdot {0.05m}^{2}}

Next Step Prepare to Evaluate

∴

P b = \frac{4 \cdot 1680}{3.1416 \cdot {0.05}^{2}}

Next Step Evaluate

∴

P b = 855616.974062029Pa

Next Step Convert to Output's Unit

∴

P b = 0.855616974062029MPa

LAST Step Rounding Answer

∴

P b = 0.8556MPa

Back Pressure when Exhaust Valve Opens Formula Elements

Variables

Constants

Back Pressure on Engine Valve

Back Pressure on Engine Valve is the pressure exerted onto the valve when it opens.

Symbol: P_b

Measurement: PressureUnit: MPa

Note: Value should be greater than 0.

Formulas to find Back Pressure on Engine Valve

Gas Load on Exhaust Valve

Gas Load on Exhaust Valve is the amount of force acting on the inner side of the exhaust valve due to the back pressure or cylinder pressure when the exhaust valve opens.

Symbol: P_g

Measurement: ForceUnit: N

Note: Value should be greater than 0.

Formulas to find Gas Load on Exhaust Valve

Diameter of Valve Head

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.

Symbol: d_v

Measurement: LengthUnit: mm

Note: Value should be greater than 0.

Formulas to find Diameter of Valve Head

Archimedes' constant

Archimedes' constant is a mathematical constant that represents the ratio of the circumference of a circle to its diameter.

Symbol: π

Value: 3.14159265358979323846264338327950288

Other formulas in Force on Rocker Arm of Valves category

Go Gas Load on Exhaust Valve when it Opens

P g = \frac{π \cdot P b \cdot {d v}^{2}}{4}

Go Downward Inertia Force on Exhaust Valve as it Moves Upwards

P = m \cdot a v

Go Initial Spring Force on Exhaust Valve

P sr = \frac{π \cdot P smax \cdot {d v}^{2}}{4}

Go Maximum Suction Pressure on Exhaust Valve

P smax = \frac{4 \cdot P sr}{π \cdot {d v}^{2}}

How to Evaluate Back Pressure when Exhaust Valve Opens?

Back Pressure when Exhaust Valve Opens evaluator uses Back Pressure on Engine Valve = (4*Gas Load on Exhaust Valve)/(pi*Diameter of Valve Head^2) to evaluate the Back Pressure on Engine Valve, Back pressure when exhaust valve opens is the pressure exerted onto the exhaust valve at the inner portion when it opens. Back Pressure on Engine Valve is denoted by P_b symbol.

How to evaluate Back Pressure when Exhaust Valve Opens using this online evaluator? To use this online evaluator for Back Pressure when Exhaust Valve Opens, enter Gas Load on Exhaust Valve (P_g) & Diameter of Valve Head (d_v) and hit the calculate button.

FAQs on Back Pressure when Exhaust Valve Opens

What is the formula to find Back Pressure when Exhaust Valve Opens?

The formula of Back Pressure when Exhaust Valve Opens is expressed as Back Pressure on Engine Valve = (4*Gas Load on Exhaust Valve)/(pi*Diameter of Valve Head^2). Here is an example- 8.6E-7 = (4*1680)/(pi*0.05^2).

How to calculate Back Pressure when Exhaust Valve Opens?

With Gas Load on Exhaust Valve (P_g) & Diameter of Valve Head (d_v) we can find Back Pressure when Exhaust Valve Opens using the formula - Back Pressure on Engine Valve = (4*Gas Load on Exhaust Valve)/(pi*Diameter of Valve Head^2). This formula also uses Archimedes' constant .

Can the Back Pressure when Exhaust Valve Opens be negative?

No, the Back Pressure when Exhaust Valve Opens, measured in Pressure cannot be negative.

Which unit is used to measure Back Pressure when Exhaust Valve Opens?

Back Pressure when Exhaust Valve Opens is usually measured using the Megapascal[MPa] for Pressure. Pascal[MPa], Kilopascal[MPa], Bar[MPa] are the few other units in which Back Pressure when Exhaust Valve Opens can be measured.

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Back Pressure when Exhaust Valve Opens Formula

Back Pressure when Exhaust Valve Opens Example

Back Pressure when Exhaust Valve Opens Solution

Back Pressure when Exhaust Valve Opens Formula Elements

Other formulas in Force on Rocker Arm of Valves category

How to Evaluate Back Pressure when Exhaust Valve Opens?

FAQs on Back Pressure when Exhaust Valve Opens

Variable Name