Required force to rotate the Engine piston

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Discussion Overview

The discussion revolves around calculating the required force to push a car engine piston down to achieve a specific rotational speed of the shaft (1500 RPM). Participants explore various aspects of engine mechanics, including torque, piston dimensions, and the dynamics of a four-cylinder, four-stroke engine.

Discussion Character

  • Technical explanation
  • Mathematical reasoning
  • Debate/contested

Main Points Raised

  • One participant inquires about the calculation of the required force on the piston, providing specific engine parameters such as piston diameter, height, mass, and engine configuration.
  • Another participant suggests that the piston should fall by itself unless obstructed, indicating that the force required may depend on overcoming friction and drag from the engine components.
  • A participant provides a series of formulas related to Brake Mean Effective Pressure (BMEP), torque, and force calculations, emphasizing the relationship between piston dynamics and engine performance.
  • Questions arise regarding the constants used in the provided formulas, with one participant seeking clarification on the significance of specific numerical values.
  • Another participant shares their own engine specifications and calculations, questioning the accuracy of their derived force based on torque and radius.
  • Further discussion includes the variability of torque at different crankshaft angles, with a participant proposing an equation to describe this relationship.
  • One participant notes that the average torque is applicable for an entire cycle, suggesting that torque will vary with crank position.

Areas of Agreement / Disagreement

Participants express varying views on the calculation methods and the factors influencing the required force, indicating that multiple competing models and interpretations exist. The discussion remains unresolved regarding the precise calculations and the implications of different parameters.

Contextual Notes

Some participants' calculations depend on assumptions about engine load, friction, and the specific geometry of the engine components, which are not fully detailed in the discussion.

ibrahim almalk
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Dears, please help me:

How to Calculate the Required Force to Push the Car Engine Piston Down if I Want to Rotate my shaft in 1500rpm, My Piston Dia Is 50mm, Piston height Is 100mm, Piston Mass Is 1kg, My Engine Is 4cylender and 4stroke?

regards
ibrahim
 
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Welcome to PF;
Unless the piston is right at the top - it should fall all by itself.
You need to find out what is stopping this.

In a 4-cylinder engine, it is probably attached to three other pistons, via the crank, so pushing one down means lifting another one and variously moving the other two ... this usually means that the pistons won't move by themselves as they are arranged to be balanced. You will have to overcome the friction (and drag) between the components - it's the sort of thing you measure rather than calculate.

If the car is in gear - then the engine is attached to a load ... the additional force depends on the load.

What do you need to know this force for?
 
The easier way to do this is to use these formulas:

BMEP (Four-Stroke Piston Engine) in PSI = [(150.8 x Ft-Lbs Torque) / (CID)]

CID = Cubic Inch Displacement of entire piston engine

BMEP (Two-Stroke Piston Engine) in PSI = [(75.4 x Ft-Lbs Torque) / (CID)]

CID = Cubic Inch Displacement of entire piston engine

Brake Horsepower (BHP) = [(BMEP x L x A x N x K) / (33,000)]

BMEP = Average Gas Pressure Exerted On Piston Head Area in PSI per powerstroke
L = Piston Stroke Length in Feet.
A = Piston Head Area in Square Inches = [(Piston Diameter / 2)² x (Π)]
N = Number of Powerstrokes Per Minute ==> Four-Stroke = RPM / 2
==> Two Stroke = RPM
K = Number of Cylinders

Ft-Lbs Torque at Crankshaft (4-Stroke Piston Engine) = [(BMEP x CID) / (150.8)]

Ft-Lbs Torque at Crankshaft (2-Stroke Piston Engine) = [(BMEP x CID) / (75.4)]

Force (pa) = [(Pressure) x (Area)]

Force in Lbs
Pressure in PSI (Lbs/Sq In)
Area in Square Inches

Force (ma) = [(Mass) x (Acceleration)]

Force in Newtons
Mass in kilograms
Acceleration in meter/sec²

1 kilogram = 2.2 Lbs
1 meter = 3.28 feet
1 Lbs = 4.45 Newtons

Piston Acceleration (G-Max) =

[(N² x L) / (2,189) x [(1) + (1 / (2A))]
N = crankshaft speed (RPM)
L = stroke in inches
A = the ratio of the connecting rod length, (length between the center of crankpin to the center of the wristpin) to the piston stroke length.

Total Force = [Force (pa)] + [Force (ma)]

Use Lbs values for both Force types and add together for Total Force

Work = Force x Distance

Work in Ft-Lbs
Force in Lbs
Distance in Feet

Power = [(Force x Distance) / (Time)]

Power in Ft-Lbs/Sec ==> 550 Ft-Lbs/Sec = 1 Horsepower = 746 Watts = 746 Joule/Sec.
Force in Lbs
Distance in Feet
Time in Seconds


Instead of figuring out what linear force on piston head is required to develop a certain torque and RPM at the crankshaft the better way to do this is to use the formulas up above. They translate the linear force on the piston head (based on BMEP & Piston Head Area) into Torque at the crankshaft.


Regards,

- MisterDynamics -

January 08, 2014
 
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Mister Dynamics - What does 150.8 and 75.4 represent in your equations for the two and four stroke engines. Thanks.
 
Never mind. Understood.
 
Help please
My engine specification
Torque=8Nm
Bore*stroke=53.5*48.8mm
Torque=Forc*radius
8=F*0.0488
F=163N
Whether calculated force is right or wrong...
 
A76342 said:
Help please
My engine specification
Torque=8Nm
Bore*stroke=53.5*48.8mm
Torque=Forc*radius
8=F*0.0488
F=163N
Whether calculated force is right or wrong...

Actually, the radius is equal to half the stroke:

equation1.gif
 
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Thnk u
 
If engine having 8 Nm torque,whenever crank shaft rotates torque acting on each point or angle(means at angle theta of 30,45,90,135...)is sam or different ?
T=F*sin(A+B)/cosB*r2
Is it ri8?abov eqn
 
  • #10
The 8 N.m is an average torque for an entire cycle. So, yes, the torque will vary depending on the crank position:

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
torque.jpg

green: single cylinder;
purple: 4-cylinder;
black: 8-cylinder.

More info in this thread.
 
  • #11
How can i calculate movement of piston with rotation of crankshaft?
 
  • #12
jack action said:
The 8 N.m is an average torque for an entire cycle. So, yes, the torque will vary depending on the crank position:

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 View attachment 82416
green: single cylinder;
purple: 4-cylinder;
black: 8-cylinder.
Is it stnd graph for all engine?
Where can i get specific graph for specific engine...lik bike,scooty...etc
More info in this thread.
 
  • #13
A76342 said:
How can i calculate movement of piston with rotation of crankshaft?

Click on (more) next to «Connecting rod length» a the bottom of this page to find the relation between the two.
 
  • #14
Plz help...
electromagnet having iron core with length of "L" thn for calculating force exerted by electromagnetic on any material given below is right formula...please help
F=(N*I)^2*μ˚*μr*A/2*G^2*L
N=no. Of turn
I=current in A
μ˚=4*pu*10^-7
μr=64*10^3
G=Distance upto which force has to cal
L=length of core
 

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