Register to reply

Engine Pressure

by ditchpanther
Tags: engine, pressure
Share this thread:
ditchpanther
#1
Apr28-08, 03:23 AM
P: 2
Hello,
I was wondering if anyone could tell me or show me how to calculate the pressure inside the cumbustion chamber of a Briggs and Stratton 5hp engine. This calculation is done at 3800 rpm. Thanks



Ditch
Phys.Org News Partner Engineering news on Phys.org
UConn makes 3-D copies of antique instrument parts
Amazon worker piloted drone around Space Needle
Five next-generation technologies for positioning, navigation and timing
brewnog
#2
Apr28-08, 03:28 PM
Sci Advisor
PF Gold
brewnog's Avatar
P: 2,794
This is a complex question, and the pressure doesn't stay constant at any point during the combustion cycle.

Mean Effective Pressure is calculated by:

MEP = 1000 * (P * Nr) / (V * N)

Where MEP is in kPa, P is power in kW, Nr is the number of crank revolutions per power stroke, V the displaced volume per cylinder, and N the number of cylinders.

Note that the peak cylinder pressure will be much higher than this, but the calculation of this is far more involved.
ditchpanther
#3
Apr28-08, 07:59 PM
P: 2
Thanks a lot this will really help with what we are doing

Ditch


Register to reply

Related Discussions
Pressure, temperatur inside ic engine..... Mechanical Engineering 11
Pressure inside an ic engine Mechanical Engineering 17
Engine experts, how does rod ratio effect how much pressure is applied to cyl. walls? Mechanical Engineering 20
Engine cylinder pressure Mechanical Engineering 15