Sports FAQ
Home / Racing

Why snow Fuk Loi Corvette sports car's engine to use two such valves, such as a whole? Why not 4,5-v

CDK61542010-01-25 14:02:06 +0000 #1
Why is this snow Fuk Loi Corvette sports car engine to use two valves, so as a whole? Why not 4,5-valve it?
snowmount2010-01-25 14:13:35 +0000 #2
engine cylinder valve is to enable timely, efficient ventilation (intake and exhaust) of the mushroom-shaped valves.

4-valve design can be a greater valve opening area, it seems bound to increase the intake and exhaust efficiency.

However, "open the greater the ventilation sooner," the simple theory is not always valid.

The engine cylinder intake process is not running to the lowest point of the piston (the ending point), the end.

When the Pistons started the row (the beginning of compression stroke), fresh gas is still able to enter the cylinder under the effect of inertia.

2-valve engine's intake valve opening area is relatively small, so in the case of low speed,

into the cylinder of gas will have a faster flow rate, so that the effect of inertia into the air more obvious,

thereby increasing volumetric efficiency. At the same time, two-valve engine combustion chamber design much more flexible than the four-valve engine,

can be compression stroke of the squeeze effect to enhance the low-speed air in the combustion chamber when the turbulence intensity,

so as to enhance the flame spread.

These two features make the two-valve engine was considerable low-speed torque - the shortcomings of the smaller valve open at low speeds but become its advantage.

Only in the case of high-speed, four-valve engine valve to open a larger area was beginning to show its advantages, while the two-valve engine is starting to become powerless because of inadequate intake.

2-valve engine's intake valve opening area is relatively small, so in the case of low speed into the cylinder of gas will have a faster flow rate, so that the effect of inertia into the air more obvious, resulting in improved volumetric efficiency. At the same time, two-valve engine combustion chamber design much more flexible than the four-valve engine, you can squeeze through the compression stroke of the gas to enhance the role of the low speed of the turbulence intensity of the combustion chamber, thereby increasing the flame spread. Torque at low speeds than the four-valve trucks. In other words, when two low-speed valve has an advantage.

Reply

Name:
Content:


Other posts in this category