Vehicle Displacement Calculation Method

The so-called automobile exhaust volume: refers to the cylinder's working volume refers to the gas volume swept by the piston from the inner point to the inner point, also known as the single cylinder displacement, which depends on the cylinder diameter and piston stroke.

The engine displacement is the sum of the working volume of each cylinder, which is generally expressed by (l. Engine displacement is one of the most important structural parameters. It represents the engine size better than the cylinder diameter and number of cylinders. Many engine indicators are closely related to the displacement.

Simple Calculation Formula

A: piston diameter mm x travel mm x 0.7854 (a fixed constant) limit 1000 (converted to CC number)
Stroke is the distance between the piston's Top Dead Point and the bottom dead point
Original Dio exhaust: 39mm × 39mm × 41.4mm × 0.7854 Gb/s 1000 = 49.45616676 CC
Dio displacement after modification: half set of 54mm cylinder, pull stroke 200 (200 is 2mm) 54 × 54 × (41.4 + 2) × 0.7854 limit 1000 = 99.39582576 CC

B: circumference rate X radius square x height 3.1416159 x piston radius mm x stroke mm
Original Field exhaust capacity of dijue 125: 3.1416159 X (52.4mm 52.4mm 57.8mm 1000mm 3.1416159mm 26.2mm 26.2mm 57.8mm 1000mm 124.6478mm CM = cc
After modification, the exhaust volume is changed to 63mm cylinder by dijue, And the stroke length is increased by 450 (4.5) 3.1416159 × (63 2 2) × (63 ÷ 2) × (57.8 + 4.5) limit 1000 = 3.1416159 × 31.5 × 31.5 × 62.3 limit 1000 = 194.205819873 CC

A. B. The difference between the two calculation methods is less than 0.01cc. it is just a rough calculation method.