FIELD OF THE TECHNOLOGY
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The present invention is involved in the field of fluid throttle control, especially the
intake and exhaust system (in this article, "intake and exhaust valve" and "throttle
valve" have the same meaning) of valve-controlled internal combustion engine (in
this article, "air valve" and "valve" have the same meaning), the valve and pump
in fuel supply system, and continuously variable timed and cross-sectional
control device of other gate-type fluid (in this invention, the definition of time and
cross-section is Ω = ∫fdt , f: the cross-section of fluid flow passage, dt: the
differential of time); through this device the continuous variable control can be
applied to effective phase difference, working time, effective lift and vortex
intensity of fluid movement of valve working of engine and the engine can attain
the optimal performance.
BACKGROUND OF THE INVENTION
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In the present, valve time, valve effective phase and valve lift is immutable in
most of valve control device of internal combustion engine, then the relative
parameters of cam lines are usually designed in the eclectic way. In this kind of
design, engine can achieve optimal performance only in some of the working
condition, however, most of engine must work in much more largo extent of
speed and load, and it is impossible that engine can keep the optimal
performance in all working condition; there are many problems, such as, lower
economics and dynamics, larger temperature influence in low temperature start,
heavy pollution of emission and bad combustion in accelerator, and so on. Except
optimizing the physical dimension of intake and exhaust channel and scavenging
mechanism, adopting technology of 4 valves, appropriate arrangement of valve,
and optimizing the structure of combustion chamber, it is an important way that
can improve the performance of engine by these technologies of variable valve
effective phase, valve time and valve lift.
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In patent literatures of China and foreign countries, there are many improved
illustrations about one of valve effective phase, valve time and valve lift or all of
them, including mechanical drive system, electromagnetic drive system, fluid
power system and other hybrid drive system. In comparison with mechanism of
immutable valve time, the variable valve time mechanism can apparently improve
the dynamics and fuel economy of engine, and the fuel economy can be
improved approximate 16%, the power can be improved about 20%. The engine
workers have developed many programs to optimize the flow process and
improve the dynamic behavior of fluid, however, only few systems which have
simple function can have been used in the products of internal combustion
engine because of many reasons, such as, manufacturing cost, operational
reliability, complexity of mechanism and scope of application of systems.
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In NO.970251(1997) paper of SAE (Society f Automotive Engineer), German
Berg M et. Designed "Δ control ― completely continuous variable valve control
mechanism of machine"; it can continuously adjust the valve lift, valve time and
effective valve phase, through attaching cam of a triangle, pull-rod or tappet, and
lock cam in the valve head. In the experiment of this mechanism, it has satisfied
result, and noise of engine sharply decreases in lower speed. But this
mechanism and control system of it is too complex: the commonality of cam of a
triangle and drive and control mechanism of it is inferior, in the same time the
mechanism of determining the geometric parameter and control model of it
cannot be dynamic adjustment; assessorial elements are heavily abraded
because assessorial mechanisms bear great and complicated force; large drive
power consumption; there are many factors that apparently affect the adjustment
of this mechanism, for example, camshaft seat, temperature of oil and engine
speed negatively influence the adjustment of slanting slid valve.
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The NO.94193867.0 China patent of Michael.B.Lily is lift device of variable valve
for internal combustion engine, which adjusts the air stream by changing pivot
location of rocker and digital follower. Pivot and rocker or digital follower have tine
suited with this pivot, and pivot changes the ratio between valve lift and cam lift
through rolling over an immovable lath. Control gap is invariable for all locations
of pivot, or is variable following the change of pivot location. The moving trace of
pivot, which is characterized by the shoe plate of pivot and a fixed lath, may be a
circle or an arc similar with this circle. Changing the interdependence between
regulating clearance and pivot location can beget controlled change of phase and
working time. Because this device has too many components and the
mechanism is too complexity, then there are some shortages as following:
because implementing diminution or enlargement of displacement is through
varying one catch point of rocker, to overcome the force of valve spring the force
of rocker will vary according to the movement of catch point, then the abrasion of
lath is non-homogeneous, especially the abrasion is the most important when
valve is at the position of maximum lift; valve clearance will vary following the
variation of the transmission ratio of rocker; to definitive rocker and drive cam, the
transmission ratio of rocker and valve lift is confined by the geometric parameters
of components and then adjustable range is also confined; because of these
reasons, such as, larger force of accessory components, larger
motion-resistance force, and more excessive drive segments, dynamical
response characteristic is influenced by all these reasons.
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The NO.US5254692 American patent of Hara.S, "porting time modifier"; the
NO.DE4404145 German patent of Hass M, "porting time modifier" and the
NO.US5431133 American patent of Spath MJ, "valve lift modifier". The common
characteristic of these patents is structuring two or three cams for driving each
valve in cam shift, and these cams correspond to the different porting
requirement of high speed, intermediate speed and low speed of an engine; in
experience this mechanism can achieve a part of requirements and have good
results. However, because the control response is cross-sectional, so that the
adaptability of this mechanism is confined and it cannot achieve the optimal
performance in all working conditions, meanwhile it is needed that adding the
relative transition mechanism from one cam to other and rocker compensating
gears for the add of moving links, and the discontinuity of input quantity will
influence the output data.
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Another realized way of valve control device of continuously variation is seeking
the optimal control strategy through hydraulic pressure system. In this way, push
rod of cam make airtight hydraulic oil flow out through a fixed little hole or through
a controlled little hole. To passive system, the result is that the opening extent or
the opening time of valve is not sufficient in low speed, and the effluent liquid
cannot make that the motion of valve is differ from the normal system in high
speed. The positive control mode can accurately control the lift and working time,
then only through the valve movement the intake process can be controlled, and
the normal throttling will be abolished. This system is described in the NO.930820
paper (Urata et.) of SAE (Society of American Engineer). The shortage of this
system is that, opening operational reliability of valve is inferior, oil viscosity
variation following the temperature will lead to fluctuation of mechanical
movement and this system is too complexity. Although the engine which is
installed this system can appear the apparent improvement of angular force and
the car installed this system can reduce 7% fuel consumption, the advantage that
mechanical system require to a serial of requirement is conspicuous.
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The figure 1 is the structure sketch of intake and exhaust system of internal
combustion engine which is currently general used in engine. This system is
mainly composed of valve actuating mechanism 2, valve spring seat 3, valve
locker 4, valve spring 5, valve guide 6, cylinder head 7, valve 9, fluid flow passage
11 and valve seat 12. The force from valve actuating mechanism 2 acts on the
head of valve 9, compress the valve spring 5 through the valve spring seat 3 and
open the valve 9. For the differential pressure, liquor is confined in the fluid flow
passage 11 of cylinder head 7 and accomplishes intake or exhaust process; with
the gradually decreasing of the force from valve actuating mechanism 2, until
canceling all force, the valve 9 will be gradually closed in the acting force from
valve spring 5. Because the geometric parameters of valve actuating mechanism
2 and other mechanisms have been defined, as well as the opening and closing
time, valve effective phase and valve lift of valve 9 are fixed; the design can only
response the eclectic scheme of some special working condition and aggregative
indicator of an engine.
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The common ground of variable valve time mechanism in the patents and papers
have been mentioned above is that: valve lift is absolute change; the force
begetting the largest lift still directly acts on the head of valve rod and this force is
large, then the valve rod is easily abraded; because the added pair will beget the
change of valve clearance and the performance of engine will be influenced, so it
is needed adding the clearance compensator and this mechanism is too
complexity and the cost is too high.
INVENTIVE CONTENTS
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The invention is aimed at offering one continuously variable timed and
cross-sectional control device which can flexibly control the phase on
opening or closing the valve, working time, lift and the fluid vortex strength.
The results show that it can improve start performance of internal combustion
engine in lower temperature, reduce the fuel consumption, make pollutants
emission less, boost the power and the torque, and reduce the noise and the
vibration. Thus it makes the internal combustion engine have excellent
performances in the working range of all velocities and loads.
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We can adopt the following technical projects to solve its main technology
problems of the invention.
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The continuously variable timed and cross-sectional control device
includes the intake and exhaust system which makes up of valve drive
mechanism, valve spring seat, valve locker, valve spring, valve guide, cylinder
head, valve, fluid flow passage, and valve seat, etc. The characteristics of the
intake and exhaust system are as follow: (1) increasing the throttle control
valve, the throttle control valve components, and the throttle control valve drive
equipment at the base of the intake and exhaust system mentioned above;(2)
fixing the throttle control valve in the clearance forming of the fluid flow passage
of the cylinder head, valve seat, and valve ;(3) Paralleling or having a common
axis with the valve guide axis and the valve movement axis;(4) the throttle control
valve moving up and down relatively to the valve;(5) the throttle control valve
drive device joining the throttle control valve components to control the throttle
control valve.
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To solve the technical problems of the invention, we also can adopt the following
technical measures.
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In regard to the before-mentioned continuously variable timed and
cross-sectional control device:
- (1) There is one eccentric hole paralleling with valve locker axes on the
valve spring seat. By the valve guide up to cylindrical head there is an eccentric
hole paralleling with valve guide axes. The throttle control valve drive device
can go through the two eccentric holes by itself or at the same time.
- (2)The external circle of the throttle control valve matches with the inner wall of
the fluid flow passage and internal hole clearance of the valve seat and its
bottom is coupled with the mushroom valve skirt.
- (3) The external circle of the throttle control valve has an annular cylindrical
shape. Above the inside circle of the throttle control valve there is a projecting
solid part joining the throttle control valve components.
- (4) partial external circle of the throttle control valve has an annular cylindrical
shape, and at the external circle circumference there is a protrusion joining the
throttle control valve components.
- (5) All external circle of the throttle control valve has an annular cylindrical shape,
and the throttle control valve components joins in the internal circle of the throttle
control valve.
- (6)The elements of the throttle control valve is baculiform. The throttle control
valve and the throttle control valve and the element of throttle control valve can
be made as a single component, or assembled by two different components.
- (7) At the bottom of annular cylindrical wall of the throttle control valve there are
one or more throttling passages which look like hole or hatch.
- (8) At the bottom of the annular cylindrical wall of the throttle control valve 10
there isn't any hole or hatch. The bottom of the throttle control valve matching
with the mushroom valve skirt has the sealing function.
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This invention of continuously variable timed and cross-sectional control
device is adding the throttle control valve and the corresponding components to
the intake and exhaust valve (throttle valve) as well as the valve seat of the
regular engine. There is a coaxial line among the throttle control valve, the
intake and exhaust valve and the valve seat. The intake and exhaust valve can
move up and down along this coaxial line (the so-called up direction is the
movement to close the valve, and the down direction is the movement to open the
valve), and the throttle control valve can also move up and down along this
coaxial line. There is relative and independent movement between the intake or
exhaust valve and the throttle control valve, because of the particularity of their
relative position, it results in a flexible timed and cross-sectional control for
whole course (In regard to valve-type IC engine, Ω =
∫fdt = 1 / 6
n ∫fdϕ, here,
f - cross-section area of fluid flow passage;
n - rotation speed;
dt - the
differential of time;
dϕ - differential of the crank angle). Therefore, the
continuous optimum control of the valve availability phase of the intake and
exhaust, working time, and swirl intensity of fluid movement during the whole
course can be achieved, from which the engine performance will be improved on
a large extent
In comparison to the existing technology, the invention has obvious merits and
availability effects. As these technical projects mentioned above, the invention
has the following merits:
- 1) It is convenient to the throttle control, thus making the driving consume power
less;
- 2) It can flexibly adjust the valve opening and closing timing phase;
- 3) It can continue to adjust the valve availability lifts.
- 4) It can flexibly adjust the valve opening and closing time;
- 5) It can flexibly adjust the flow turbulence intension;
- 6) It will be convenient to programming in the real-time control.
-
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The invention is according the relatively independent movement means between
the intake and exhaust valve and the throttle control valve to change the valve
phase-working time-lift, and the vortex intensity of fluid movement. The valve and
its drive gear keep original mode, and adding the throttle control valve and the
corresponding control gear. The working principle is far from the existing working
principle. To the engine having valve, it can realize flexible gas exchange in the
range of all conditions. The invention has the following characteristics:
- 1) The design project is fit for the valve drive engine such as the traditional jib
style, up-setting cam shaft style, and other valve driving means;
- 2) The design project is fit for single intake and exhaust valve or multi-intake and
exhaust valves of every cylinder;
- 3) The structure of the mechanism is simple and needn't adding more
accessories;
- 4) The control process of the hardware and software be realized dynamically
under the engine movement, and can be controlled in all ranges;
- 5) The relativity independent movements between the throttle and throttle
controllable valve can flexibly change the valve effective phase, working time, the
effective lifts, and the vortex intensity of fluid movement. At the same time it can
make the best use of the advantage of the software control, make the working
mode variety and selectivity, and make the driving consume power less;
- 6) It will obviously improve the low temperature start performance, realize start in
turn, and reduce largely start power. The corresponding performance has greatly
improved because the key technology of the low temperature start is broken
through;
- 7) It will improve obviously the noise and the vibration;
- 8) It will reduce the exhaust emissions and is convenient to the EGR control;
- 9) It has excellent economic performance under the part and full load conditions;
- 10) It may call off the butterfly valve and improve the power and the torque of the
internal combustion engine;
- 11) It can improve the acceleration performance of the engine, lower its idle
velocity, and having excellent stability.
-
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The invention is fit for the other design projects using differ means making the
throttle control valve working time and cross-section and vortex intensity of fluid
movement flexible change.
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The specific implement way of the present invention is given by the following
implement examples and their attached drawings.
BRIEF DESCRIPTION OF THE FIGURES
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- FIG.1 is a structural diagrammatic view showing the intake and exhaust system
of the ICE which is in general use.
- FIG.2 is a structural diagrammatic view showing the intake and exhaust system
of the ICE when they are closed according to the present invention.
- FIG.3 is a structural diagrammatic view showing the intake valve and the exhaust
valve during the process of the ICE' s starting on cold temperature according to
the present invention.
- FIG.4 is a structural diagrammatic view showing the intake valve and the exhaust
valve during the process of the ICE' s operation.
- FIG.5 is a structural diagrammatic view showing the first implement example of
the throttle valve according to the present invention.
- FIG.6 is the vertical view of FIG.5.
- FIG.7 is a structural diagrammatic view showing the second implement example
of the throttle valve according to the present invention.
- FIG.8 is the vertical view of FIG.7.
- FIG.9 is a structural diagrammatic view showing the third implement example of
the throttle valve according to the present invention.
- FIG.10 is the vertical view of FIG.9.
- FIG.11 is a graph when the valve's effective lift ΔH = valve's actual lift H1
according to the present invention.
- FIG.12 is a graph when the valve's effective lift ΔH = 0 according to the present
invention.
- FIG.13 is a graph when the valve's effective lift ΔH = valve's actual lift H1 - throttle
valve's lift H2 according to the present invention.
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SPECIFIC IMPLEMENT WAY
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Referring now to the specific implement way, structure, character and efficiency
of the continuously variable timed and cross-sectional control device
according to the present invention, the detailed description is given as follows by
combining attached drawings and better implement examples.
-
FIG.2 is a structural diagrammatic view showing the intake and exhaust system
of the IC engine when they are closed according to the present invention. Hence,
the present invention includes the IC engine's intake and exhaust system which
are composed of throttle valve drive mechanism 1 valve drive mechanism 2,
valve spring seat 3 valve locker 4, valve spring 5, valve guide 6, cylinder head 7
throttle valve component 8, valve 9, throttle valve 10, fluid flow passage 11, valve
seat 12, and so on. The present invention adds throttle valve and the
corresponding control device to the ICE which is in general use ; valve guide 6,
valve 9, throttle valve 10 and valve seat 12 are fixed on the same axis (common
axis); the bottom of throttle valve 10 matches the skirt of valve 9, the external
circle of throttle valve 10 and the inner wall of fluid flow passage 11 match the
internal pore of valve seat 12; paralleling to the axis of valve guide 6 (common
axis), there is an eccentric pore h2 nearby the valve guide 6 which is on cylinder
head 7; paralleling to the pore axis of valve locker 4, there is an eccentric pore h1
on valve spring seat 3; throttle valve component 8 can go through the eccentric
pore h2 and the eccentric pore h1 separately or at the same time; valve drive
mechanism 1 controls throttle valve 10 through throttle valve component 8; under
the action of force from throttle valve drive mechanism 1, throttle valve 10 can
make up-and-down movement alone the axis in the inner wall of fluid flow
passage 11 and the valve seat 12, throttle valve 10 can also make up-and-down
movement under the action of force from valve 9; valve 9 can move up-and-down
(open and close) along the axis of valve guide 6 under the action of force from
valve drive mechanism 2 and valve spring 5; being relative to valve guide 6, fluid
flow passage 11 and the internal pore of valve seat 12, valve 9 and throttle valve
10 can make independent relative movement, and the relative movement
composes the flexible time-cross-section; during the process of valve 9's
movement, the up-and-down movement of throttle valve 10 can control the
effective phase, working time, effective lift and the vortex intensity of fluid
movement of valve 9 when it is open or close, the manual and automatic
implement modes can be mechanical mode, hydraulic or pneumatic control
mode, electric power and electromagnetism control mode or other modes.
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FIG.3 is a structural diagrammatic view showing the intake valve and the exhaust
valve during the process of the IC engine's start on lower temperature according
to the present invention. The force from valve drive mechanism 2 acts on the top
of valve 9 directly, it presses valve spring 5 and valve 9 to move downward (open
valve) along axis through valve locker 4 and valve spring seat 3, the force from
throttle valve drive mechanism 1 acts on throttle valve 10 through throttle valve
component 8, throttle valve 10 can move up-and-down along the common axis
following valve 9, the position of throttle valve 10 is controlled by throttle valve
drive mechanism 1, there is throttle channel 13 on the circular barrel which is at
the bottom of throttle valve 10, we can get its position and cross-sectional area
through optimization; for the existence of draught head between the inner of
cylinder and exterior, the liquid is forced to move in the fluid flow passage 11
which is in cylinder head 7, it enters and discharges from cylinder through throttle
channel 13 so as to complete gas exchange; when the force from valve drive
mechanism 2 reduces gradually and withdraws finally, valve 9 closes gradually
under the action of the force from valve spring 5; during the process of close, the
circular barrel's bottom of throttle valve 10 resets to the original position under the
action of the force from valve 9's skirt moving upward, throttle valve 10 can also
reset under the control of throttle valve drive mechanism 1. During the process of
start, throttle valve 10's moving position at valve 9 should increase the intake
resistance and exhaust resistance as big as possible so as to remain a certain
amount of unburned or burned mixture of proximal cycle in the cylinder and
improve the ignition environment till the ICE can start smoothly.
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For multi-cylinder engine, on a certain amount of throttle valve 10's circular
barrels have throttle channel 13, while the rest have no throttle channel 13; by
doing so, the cylinders without throttle channel 13 of throttle valve 10 have
seldom ventilation volume during the process of start, while the cylinders having
throttle channel 13 of throttle valve 10 can ignite continuously; the corresponding
purpose can also be realized by controlling the moving position of throttle valve
10 without throttle channel so as to get different effective time-cross-section area,
because the reduction of the compressed waste work results in the reduction of
start moment of resistance, its start becomes much easier and it can realize
hardware program or control the sequence of ignition using software.
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The present invention can be realized at low cost when it is only used to improve
the start in lower temperature. During the process of start, we set the throttle
valve 10 which is in the intake and exhaust mechanism to the proper position
according to the environment parameter so as to get the optimal effect and make
the ICE start smoothly, after the start ends, throttle valve 10 will be set to the
inactive status (position), at this time this device seems not exist.
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The present invention breaks through the technical bottleneck of the IC engine's
start in lower temperature, so it improves the other performance index (such as
specific fuel consumption-emission-noise-vibration and so on) greatly. FIG.4 is a
structural diagrammatic view showing the intake valve and the exhaust valve
during the process of the IC engine's operation. Moving status of the throttle valve
is controlled manually or automatically through throttle valve drive mechanism 1
according to the IC engine's status parameters (including number of revolution,
load, temperature, environment parameter, and so on), throttle valve 10's
up-and-down movement can control the effective phase, working time, effective
lift and the vortex intensity of fluid movement of valve 9 when it is open; when the
IC engine operates at rated load and excess load, the bottom of throttle valve 10
doesn't contact the skirt of valve 9 and it has no choking effect; when the ICE
operates at underrated load, throttle valve 10 can move along the axis to control
the effective time-cross-section of valve 9 when it is open, so the ventilation
volume is controlled correspondingly. Effective time-cross-section is large when
load is heavy, otherwise it is small; when the IC engine operates at dynamic load,
throttle valve 10's moving position can be controlled manually in steps or through
other ways so as to seek the optimum working status, it has a very big flexibility
and it can realize multi-mode operation (starting mode, economical mode,
low-exhaust mode, overload mode, and so on). For the IC engine with multiple
intake valves and exhaust valves, every throttle valve 10's movement can be
controlled according to different vortex intensity of fluid movement and the
demand of ventilation volume in the same cylinder.
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In multi-cylinder engine, throttle channel 13 are set on annulations of a certain
quantity of throttle control valve 10, and there are no throttle channel 13 on other
throttle control valve 10; So the quantities of gas exchange in the cylinder that
have no throttle channel 13 on throttle control valve 10 are very few during
starting course, and the cylinder set throttle channel 13 on throttle control valve
10 can inflame continuously; We can also reach corresponding purpose by
acquiring different effective time and cross-section valves by controlling the
motion location of throttle control valve 10 which have no throttle channel. In this
way, because of compression work decreasing, engines can shutdown a certain
quantity of working cylinder when it work in lower load. It has obvious advantages
applying the project to multi-cylinder engines with electronic fuel injection system.
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The application of throttle control valve 10 can cancel the throttle shutter
(Butterfly shape valve) in intake pipe on carburetor engine, electronic fuel
injection engine or other fuels engine. Under equal condition, throttling loss
reduces largely and increases the pressure of each air inlet valve, therefore
improving air inlet quality, raising power and improving economy and power
capability etc., at the same time acquiring low idle speed and good stability etc..
The effect is obvious applying the project to turbo-supercharge engines.
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When applying the invention to exhaust valve, the location during exhaust
process of throttle control valve 10 influence exhaust resistance directly. By
controlling the quantity of the remaining waste gas in cylinder and improving
exhaust quality, the direct inner EGR control can be realized. During low
temperature starting, by controlling throttle control the effective time and
cross-section of valve 10 and valve 9, a certain quantity unburned or burned
mixed air during former cycle can be kept in cylinder forcedly, so that raise the
compressed temperature of next cycle to make it reach the condition of firing
continuous and realize starting smoothly.
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Fig.5 - 10 is the 3 kinds of structural sketches of throttle control valve 10. Part of
or all of throttle control valve 10 are designed to cylinder, it's placed in the room
formed by fluid passageway 11 and valve seat 12 in valve 9 and cylinder head 7.
Throttle control valve 10, valve 9 have independent relative motion relative to
valve guide bush 6 and fluid passageway 11 and inner hole of valve seat 12, the
relative motion forms effective flexible time and cross-section; the up and down
motion of throttle control valve 10 can control the effective phase, working time,
effective lift and the vortex strength of fluid movement when intake valve and
exhaust valve 9 is open or close.
-
Fig.5 is the first implement illustration structural sketches of throttle control valve,
Fig.6 is the vertical view of Fig.5. As Fig.5, 6 show, the outer surface of throttle
control valve 10 is annular cylinder, and inner circle surface have an extrusive
entity. It is used to connect with throttle control valve's component 8. The bottom
of throttle control valve 10 cooperates with skirt department of valve 9, and the
outer circle surface cooperates with fluid flow passage 11 and the inner hole of
valve seat 12. Throttle channel 13 are designed on the nether annular cylinder of
throttle control valve 10, throttle passageway 13 is closing or opening type; we
can also do not set throttle channel 13 on the nether annular cylinder of throttle
control valve 10. It is feasible to make throttle control valve 10 and throttle control
valve's component 8 into integration, or make the two components respectively,
and then assemble them together.
-
Fig.7 is the second implement illustration structural sketches of throttle control
valve, Fig.8 is the vertical view of Fig.7. As Fig.7, 8 show, the outer surface of
throttle control valve 10 is annular cylinder, and external circle surface have a
extrusive entity, it is used to connect with throttle control valve's component 8.
The extrusive entity of external circle surface can be assembled in the eccentric
hole of cylinder head 7, and the bottom of throttle control valve 10 cooperate with
skirt department of valve 9, and the outer circle surface cooperate with fluid flow
passage 11 and the inner hole of valve seat 12. Throttle channel 13 are designed
on the nether annular cylinder of throttle control valve 10. Throttle channel 13 is
closing or opening type and the shape of throttle channel 13 may be hole or
opening shape; we can also do not set throttle channel 13 on the nether annular
cylinder of throttle control valve 10. It is feasible to make throttle control valve 10
and throttle control valve's component 8 into integration, or make the two
components respectively, and then assemble them together.
-
Fig.9 is the third implement illustration structural sketches of throttle control valve,
Fig. 10 is the vertical view of Fig.9. As Fig.9, 10 show, the outer surface of throttle
control valve 10 is annular cylinder, throttle control valve's component 8 is
connected with the circle surface throttle control valve 10, and the axes of throttle
control valve's component 8 is parallel with the axes of throttle control valve 10;
the bottom of throttle control valve 10 cooperate with skirt department of valve 9,
and the outer circle surface cooperate with fluid flow passage 11 and the inner
hole of valve seat 12. Throttle channel 13 are designed on the nether annular
cylinder of throttle control valve 10.Throttle channel 13 is closing or opening type;
we can also do not set throttle channel 13 on the nether annular cylinder of
throttle control valve 10. It is feasible to make throttle control valve 10 and throttle
control valve's component 8 into integration, or make the two components
respectively, and then assemble them together.
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A curve fit of the relationship between effective lift of valve and crankshaft angle is
shown in Fig.11-13. The controlling range of effective phase is : Ø E(0, ),
where is opening or closing angles; The controlling range of time is : tE(0,
/6n); The effective lift = actual lift of valve H1-lift of throttle control valve H2, The
controlling range of effective lift is :ΛHE (0, H max), where, H max is the maximal
actual lift of valve 9.
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Fig.11 is a curve fit of the relationship between effective lift of valve and
crankshaft angle when effective lift of valve ΔH=actual lift of valve H1. At this
time, lift of throttle control valve 10=0, and also flexible time and cross-section
area=0, and engine works under high load or overload state. Here throttle control
valve 10 does not work for effective phase, working time and effective lift, but it
can control strength of fluid vortex.
-
Fig.12 is a curve fit of the relationship between effective lift of valve and
crankshaft angle when effective lift of valve ΔH=0. At this time, lift of throttle
control valve 10 H2-actual lift H1 of valve 9, and whole area is the flexible time
and cross-section area, and engine works under lowing load or low temperature
starting state. Here throttle control valve 10 does work for effective phase,
working time and effective lift, and it can control strength of fluid vortex.
-
Fig.13 is a curve fit of the relationship between effective lift of valve and
crankshaft angle when effective lift of valve ΔH= actual lift of valve H1-lift of
throttle control valve H2. At this time, ΔH>0.Upper cross-section is the effective
cross-section area under the condition of1≤≤2 , and the others are flexible time
and cross-section area. Lift of throttle control valve H2 is controlled by driving
device 1 of throttle control valve, and engine works under lowing load or low
temperature starting state. Here throttle control valve 10 does work for effective
phase, working time and effective lift, and it can control strength of fluid vortex.
-
The expatiation above is only better implement illustration structural, and do not
mean the invention is restricted by any form. So any simple modifications, the
same varieties and decorations depending on the technique theory of the
invention belong to the scope of technical scheme of the invention.
