Eight or sixteen: car with which engine to choose
Automobile engines with both two and four valves per cylinder have their advantages and disadvantages .
We will consider them in order to choose the best option for ourselves. .
The initial meaning of the four valves per cylinder is to, due to the larger total area of two simultaneously opening valves, provide greater throughput, and consequently a greater amount of fuel – air mixture, which will enter the cylinder in a short period of time opening the valve. The motivation will be similar with exhaust valves, although designs were known in which there were three valves per cylinder: two inlet and one exhaust, and it was believed that a single exhaust valve would cope with the task of exhausting gases, since the latter exit under pressure .
1 . Simple in design
2. Cheaper to manufacture
3. Self-repair and maintenance is possible, which includes replacing belts, etc. e., the truth requires a procedure for adjusting valve clearances, since hydraulic compensators for such an engine are often not installed by the manufacturer due to the economy .
4 . Relatively not whimsical to the quality of oil and fuel, due to the lack of the same hydraulic lifters and less load on the cylinder-piston group .
5 . Bole “high-torque” at low crankshaft speeds .
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