Summary of the Invention
The object of this
invention is to provide an improved airflow and air swirling
system for an internal combustion engine. More particularly,
an air swirling device having a plurality of vanes is
positioned within an air cleaner or air induction system of
an internal combustion engine for achieving complete
combustion. The air flow system is used for a spark ignition
internal combustion engine of a carburettor type or a fuel
injection type, and a diesel engine of a high compression
self-ignition type.
One advantage of the air swirling device of the present
invention is that it minimises the restriction of airflow
and causes the fuel to stay in the centre part of the swirl
of air and prevents adherence of the fuel to the wall of the
intake system. This provides for a good mixture of air and
fuel resulting therefore in better combustion of the fuel
charge.
If there is only a slight pedal depression, the amounted of
fuel injected or inducted is less thereby resulting in fuel
savings.
During operation, the air intake-valve continuously opens
and closes. When the valve is closed a revolution inertia
force causes a high density of air/fuel charge, which surges
into the combustion chamber when the valve opens. During the
combustion, the flame is scattered and the fuel is
completely combusted thereby producing a uniform force
downwardly on the piston. The uniform force prevents noise
vibration and abrasion thereby causing stronger engine power
and longer engine life. The fast combustion is useful with
advanced spark timing and results in leaner combustion lower
air pollution and fuel savings. The combustion bi-products
(carbon and oxides) are concentrated in the centre of the
combustion chamber and can be easily exhausted to prevent
carbon accumulation in the combustion chamber, which could
cause engine abrasion.
The swirling action may continue in the same direction as
the gas leaves the combustion chamber. When the swirling
device is placed in the air cleaner, the carbon monoxide
(CO) gas level can be reduced up to 20% at engine idle
speed. The engine power can be increased up to 8%. These
data were calculated and measured by the Korea National
Industry Research Institute.
It is known that an increase of swirl flow in a combustion
chamber of an internal combustion engine improves the flame
propagation speed so that complete combustion is achieved.
However, there are many problems that accompany attempts to
increase airflow, such as air resistance and the like. Such
known facts are shown in the following prior art documents.
For example, Japanese patent publication Nos. 53-26247,
59-11722, and U.S. Pat. No. 44,309,69 discloses a simple
turbulence device, which includes an intake valve having a
large intake resistance so that the swirling device does not
create a uniform airflow. Japanese patent publication Nos.
60-17922 and 61-10645. U.S Patent 4,424,777, 4,432,312 and
4,539,954, disclose a device having vanes which are disposed
at the vicinity of an intake valve. Such devices have
various disadvantages, such as for example, air resistance,
reduced inlet air into the cylinder, varying airflows of
intake manifolds and strong vibrations due to different
swirl ratios and volumes of intake air. U.S. Pat Nos.
3,648,674 and 4,274,386 carburettor and an intake manifold.
However, the device exhibits high friction so that the
device provides a reduced amount of inlet air and is used
only for a gasoline engine of the carburettor type.
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