Maximum Lift of Valve given Diameter of Port and Valve Seat Angle Calculator

✖Diameter of Port is the diameter of the opening of the port of an IC Engine.ⓘ Diameter of Port [d_p]			+10% -10%
✖Valve Seat Angle is the angle of the seat of a valve from the direction perpendicular to the valve length.ⓘ Valve Seat Angle [α]			+10% -10%

✖Lift of Valve is the height to which the valve is lifted during operation for the flow of gases.ⓘ Maximum Lift of Valve given Diameter of Port and Valve Seat Angle [h_max]

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Formula

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Maximum Lift of Valve given Diameter of Port and Valve Seat Angle

Formula

`"h"_{"max"} = "d"_{"p"}/(4*cos("α"))`

Example

`"14.14214mm"="40mm"/(4*cos("45°"))`

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Maximum Lift of Valve given Diameter of Port and Valve Seat Angle Solution

STEP 0: Pre-Calculation Summary

Formula Used

Lift of Valve = Diameter of Port/(4*cos(Valve Seat Angle))
h_max = d_p/(4*cos(α))
This formula uses 1 Functions, 3 Variables

Functions Used

cos - Cosine of an angle is the ratio of the side adjacent to the angle to the hypotenuse of the triangle., cos(Angle)

Variables Used

Lift of Valve - (Measured in Meter) - Lift of Valve is the height to which the valve is lifted during operation for the flow of gases.
Diameter of Port - (Measured in Meter) - Diameter of Port is the diameter of the opening of the port of an IC Engine.
Valve Seat Angle - (Measured in Radian) - Valve Seat Angle is the angle of the seat of a valve from the direction perpendicular to the valve length.

STEP 1: Convert Input(s) to Base Unit

Diameter of Port: 40 Millimeter --> 0.04 Meter (Check conversion here)
Valve Seat Angle: 45 Degree --> 0.785398163397301 Radian (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

h_max = d_p/(4*cos(α)) --> 0.04/(4*cos(0.785398163397301))

Evaluating ... ...

h_max = 0.0141421356237289

STEP 3: Convert Result to Output's Unit

0.0141421356237289 Meter -->14.1421356237289 Millimeter (Check conversion here)

FINAL ANSWER

14.1421356237289 ≈ 14.14214 Millimeter <-- Lift of Valve

(Calculation completed in 00.004 seconds)

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Home » Physics » IC Engine » Design of IC Engine Components » Engine Valves » Valve Lift » Maximum Lift of Valve given Diameter of Port and Valve Seat Angle

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Created by Saurabh Patil

Shri Govindram Seksaria Institute of Technology and Science (SGSITS ), Indore

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< 6 Valve Lift Calculators

Valve Seat Angle given Maximum Lift of Valve

Go Valve Seat Angle = arccos(Diameter of Port/(4*Lift of Valve))

Maximum Lift of Valve given Diameter of Port and Valve Seat Angle

Go Lift of Valve = Diameter of Port/(4*cos(Valve Seat Angle))

Diameter of Port given Maximum Lift of Valve

Go Diameter of Port = 4*Lift of Valve*cos(Valve Seat Angle)

Force Required to Lift Engine Valve

Go Force to Lift Engine Valve = Stiffness of Valve Spring*Lift of Valve

Lift of Engine Valve

Go Lift of Valve = Force to Lift Engine Valve/Stiffness of Valve Spring

Maximum Lift of Valve for Flat Headed Valves

Go Lift of Valve = Diameter of Port/4

Maximum Lift of Valve given Diameter of Port and Valve Seat Angle Formula

Lift of Valve = Diameter of Port/(4*cos(Valve Seat Angle))
h_max = d_p/(4*cos(α))

Construction of Poppet valve of an IC Engine

The poppet valve consists of a disk called ‘head’ at the end of a rod called ‘stem’. The ‘face’ of the valve is a conical surface that comes in contact with a valve seat It has a face angle varying from 30° to 45°. The conical surface of the valve results in the self-centering property. There is a small margin between the head and the face. There are two reasons for providing the margin—it avoids the sharp edges and a provision is made for regrinding of the valve. The lower end of the valve stem has a groove. A spring retainer is fitted in this groove, which supports one end of the valve spring. In slow-speed engines, valves have composite construction with a cast iron head and steel stem. In high-speed engines, one-piece construction is used and valves are forged.

How to Calculate Maximum Lift of Valve given Diameter of Port and Valve Seat Angle?

Maximum Lift of Valve given Diameter of Port and Valve Seat Angle calculator uses Lift of Valve = Diameter of Port/(4*cos(Valve Seat Angle)) to calculate the Lift of Valve, Maximum lift of valve given diameter of port and valve seat angle is the maximum height to which the valve is lifted during operation for the flow of gases. Lift of Valve is denoted by h_max symbol.

How to calculate Maximum Lift of Valve given Diameter of Port and Valve Seat Angle using this online calculator? To use this online calculator for Maximum Lift of Valve given Diameter of Port and Valve Seat Angle, enter Diameter of Port (d_p) & Valve Seat Angle (α) and hit the calculate button. Here is how the Maximum Lift of Valve given Diameter of Port and Valve Seat Angle calculation can be explained with given input values -> 14142.14 = 0.04/(4*cos(0.785398163397301)).

FAQ

What is Maximum Lift of Valve given Diameter of Port and Valve Seat Angle?

Maximum lift of valve given diameter of port and valve seat angle is the maximum height to which the valve is lifted during operation for the flow of gases and is represented as h_max = d_p/(4*cos(α)) or Lift of Valve = Diameter of Port/(4*cos(Valve Seat Angle)). Diameter of Port is the diameter of the opening of the port of an IC Engine & Valve Seat Angle is the angle of the seat of a valve from the direction perpendicular to the valve length.

How to calculate Maximum Lift of Valve given Diameter of Port and Valve Seat Angle?

Maximum lift of valve given diameter of port and valve seat angle is the maximum height to which the valve is lifted during operation for the flow of gases is calculated using Lift of Valve = Diameter of Port/(4*cos(Valve Seat Angle)). To calculate Maximum Lift of Valve given Diameter of Port and Valve Seat Angle, you need Diameter of Port (d_p) & Valve Seat Angle (α). With our tool, you need to enter the respective value for Diameter of Port & Valve Seat Angle 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 Lift of Valve?

In this formula, Lift of Valve uses Diameter of Port & Valve Seat Angle. We can use 2 other way(s) to calculate the same, which is/are as follows -

Lift of Valve = Diameter of Port/4
Lift of Valve = Force to Lift Engine Valve/Stiffness of Valve Spring

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