ABE TUTORIALS

PROBLEM 16:

DETERMINE THE COMPRESSION RATIO OF THE ENGINE WITH THE FOLLOWING SPECIFICATIONS:
Total Volume (TV) = 80 cc
Bore = 4 cm
Stroke = 5 cm

Select the compression ratio:

a. 4.66:1 | b. 1.27:1 | c. 5.33:1 | d. 8.5:1 | e. nota

View Solution

Step 1: Calculate Displacement Volume (Vd).
Vd = (π × D² × L) / 4
Vd = (3.1416 × 4² × 5) / 4
Vd = 62.83 cc

Step 2: Calculate Clearance Volume (Vc).
Vc = Total Volume - Displacement Volume
Vc = 80 cc - 62.83 cc = 17.17 cc

Step 3: Solve for Compression Ratio (CR).
CR = Total Volume / Clearance Volume
CR = 80 / 17.17 = 4.66

Result: a. 4.66:1