Introduction.
One of the tendencies in the development of internal-combustion engines
of last years is the achievement of high values of torque in the modes
of low or medium revolution - a typical application area for serial cars
designed primarily for city transportation.
So the majority of modern drives are advertised as having values of
a torque more than 80... 90 % from maximum in all effective range.
The necessity to increase a torque on modes of partial loads, saving
high maximum power of the engine, results in optimization of parameters
of the engine with reference to each mode of its activity. Alongside with
conventional ways of optimization of parameters such as cross-section of
the throttle and ignition advance, have begun to be applied intake systems
with changed by a natural frequency of oscillations and phases of a valve
timing.
All till now known systems of tuning of a resonance of an intake organize
periodic simple harmonic motions of a flow of gases of a resonator, while
engine generates periodic nonharmonic oscillations, therefore is not reached
the maximum possible oscillation frequencies, there is an attenuation of
a resonance, and as a corollary weak filling of cylinders.
The considered patent eliminates this
inconsistency offering maximum to use energy of oscillations for filling
of cylinders at the same time easily allowing to attune a resonator on
different oscillation frequencies and to coordinate phases of a resonator
with phases of a valve timing of the engine.
Patent of the Russian Federation No. 2114313
"System of resonance supercharging of internal-combustion engine (options)"
Abstract.
IPC 6 F 02B 27/00
The invention belongs to the field of mechanical engineering, namely to
an engine building, in particular, to devices for intake using oscillations
of air or a combustion-mixture in pipelines.
Substance of the invention: Resonance supercharging system of IC engine
consists of intake collector 2 and resonator block, connected to it, with
variable parameters, designed as a volume resonator 4 with an internal
partition 5 movable along axis during the pressure drop within the space
between the resonator bottom and its fixed point. In a partition are stipulated
the means 6 for a by-pass of gas medium.
The invention provides a mode of nonharmonic periodic oscillation and
increase of efficiency of supercharging.
Operation
During phase of the internal-combustion engine intake there is lowering
pressure in the intake collector 2 of internal-combustion engine 1. Under
an operation of rarefaction there is an inflow of gases not only from under
a butterfly but also from the channel 3 of the resonator block. Movable
partition 5, under the pressure difference on its sides, occupies a
fixed position and restricts volume, defining maximum resonator
block rigidity at an aspiration from it of gases. During filling the
cylinder CE the rarefaction in an inlet collector 2 is lowering, also its
effect on gas flowing on the channel 3 is diminished. Under the effect
of kinetic energy the gas keeps flowing into the intake collector 2. There
is an additional filling of the cylinder. Due to the counterwork of the
resonator block, in which at this moment the rarefaction was formed, the
gas outflow slows down and reverse gas suction into the resonator block
begins. At this moment the resonator block has a maximum rigidity (as only
the part of volume participates in operation), the moment of a sucking
coincides on time with an inverse ejection from a drive 1, increasing energy
of a stream in the channel 3. As the resonator block is being filled the
pressure in its cameras levels off and the the
movable partition 5 are moving from the fixed position counteracts
the pressure drop between the cameras with the result that (at a heightening
of pressure) the rigidity of the resonator block defines all its volume.
Due to low resonator block rigidity the
increase of counterwork to driving of gases occurs more slowly and effluxion
from the block begins later. During this time there is a change of phases
of a drive and again intake coincides with the expiration of gases from
the resonator. The process iterates.
Obviously process of operation of the device is presented here
(120 Kb)
Resonator block rigidity - counteraction of
close volume at pumping in (pumping out) in (from) it of some amount of
gas.
Movable partition - e.g. membrane, piston,
or sylphon 7.
If you have any questions or suggestions you can contact the author
via e-mail: vasiliy-s@mtu-net.ru.
beginning of document