You can calculate the compression ratio of a Engine.
The compression (or compression ratio) of a Engine is a relevant indicator of a Engine's efficiency. The compression ratio is defined as the ratio of the manual in the combustion chamber from the greatest jotter to the lowest publication. A eminent compression ratio allows a bigger go back on the strength place into the Engine from fuel, while a low compression ratio may exhibit a botheration in the mechanics of the Engine or a inadequacy of fuel recall. Contradistinct types of engines Testament typically gain changed compression ratios; thereupon, it can be foremost to calculate the compression ratio for decided types of motors and compare it to generally regular values.
Instructions
Determine the Cylinder Volume
1. Square the cylinder width (again called the cylinder Muzzle). For instance, provided the measured price is 3 cm, then the Conclusion is 3 x 3 = 9 cm^2.
2. Multiply the aftermath from System 1 by the piston stroke length. If the stroke length is 7 cm, then the result of this calculation (using the above example) is 9 cm^2 x 7 cm = 63 cc (cubic centimeters).
3. Multiply the result from Step 2 by the constant pi (3.14159), then divide by 4. If you want to condense this into a single step, multiply the result in Step 2 by 0.7854. The resulting value is the cylinder volume. Continuing the example, this gives 63cc x 0.7854 = 49.5 cc.
Determine the Compression Ratio
4. Find the volume of the combustion chamber. This may need to be directly measured, due to the unusual geometry of the combustion chamber. For the purpose of the example, assume the value is 60 cc.
5. Divide the cylinder volume (the result of Section 1) by the volume of the combustion chamber. In this example, the compression ratio of the motor would be 1.825.
To calculate this using our example values, divide 49.5 cc by 60 cc, which gives 0.825.6. Take the result from Step 2 and add 1. This value is the compression ratio of the motor.
