What is the advantage of having connecting rod length to crank radius ratio?
The connecting rod length to crank radius ratio is usually defined as R. For a fixed volumetric capacity of the engine, a longer stroke allows for a smaller bore (under square). The advantage is a lower surface area in the combustion chamber and correspondingly less heat loss. This will improve the thermal efficiency within the combustion chamber. The disadvantage is that the longer stroke, the higher piston speed and higher friction losses, which reduce the effective engine power.
If the stroke is reduced, the bore diameter must be increased and the engine will be over square. This results in lower friction losses but increases heat transfer losses. Most of the modern automobile engines are near square, with some slightly over square and some slightly under square.
How to Calculate Connecting Rod Length to Crank Radius Ratio?
Connecting Rod Length to Crank Radius Ratio calculator uses Connecting Rod Length to Crank Radius Ratio = Connecting Rod Length/Crank Radius of Engine to calculate the Connecting Rod Length to Crank Radius Ratio, The Connecting Rod Length to Crank Radius Ratio formula is defined as the ratio of the connecting rod length to the crankshaft radius of an IC engine. Connecting Rod Length to Crank Radius Ratio is denoted by R symbol.
How to calculate Connecting Rod Length to Crank Radius Ratio using this online calculator? To use this online calculator for Connecting Rod Length to Crank Radius Ratio, enter Connecting Rod Length (r) & Crank Radius of Engine (rc) and hit the calculate button. Here is how the Connecting Rod Length to Crank Radius Ratio calculation can be explained with given input values -> 1.091636 = 0.1501/0.1375.