Page 122 - 05. Subyek Teknik Mesin - Automobile Mechanical and Electrical Systems Automotive Technology Vehicle Maintenance and Repair (Vehicle Maintenance Repr Nv2) by Tom Denton

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106 Automobile mechanical and electrical systems

Figure 2.43 Five-cylinder in-line engines

Figure 2.44 Six-cylinder engines

Six-cylinder engines ( Fig. 2.44 ) are very common and have been built with in-line,
horizontally opposed and V layouts. The construction and manufacturing costs
of a six-cylinder engine are higher but they are well balanced and offer smoother
power delivery than the equivalent four-cylinder engine. If greater engine capacity
is necessary, then a six-cylinder engine is necessary to keep the individual
cylinder displacements in the optimum range.
Horizontally opposed and V engines ( Fig. 2.45 ) have shorter crankshafts and
overall length than the equivalent in-line engines. This makes them appropriate
for transverse or overhung installation in the powertrain. The optimum angle for a
V6 cylinder engine is 60°.
Eight, ten, twelve and higher V confi guration engines are manufactured but less
common in vehicle applications ( Fig. 2.46 ). V8 engines are very common and
used in most countries on larger vehicles. There are petrol and diesel engine
designs that employ this layout with engine capacities greater than 3 litres. The
optimum V-angle for cylinder banks in an eight-cylinder V engine is 90°.