U.S. patent application number 14/312250 was filed with the patent office on 2015-07-02 for variable compression system for controlling slant angle of slant plate.
This patent application is currently assigned to Hyundai Motor Company. The applicant listed for this patent is Hyundai Motor Company. Invention is credited to Yong Woong Cha.
Application Number | 20150184650 14/312250 |
Document ID | / |
Family ID | 53481190 |
Filed Date | 2015-07-02 |
United States Patent
Application |
20150184650 |
Kind Code |
A1 |
Cha; Yong Woong |
July 2, 2015 |
VARIABLE COMPRESSION SYSTEM FOR CONTROLLING SLANT ANGLE OF SLANT
PLATE
Abstract
A variable compression system for controlling a slant angle of a
slant plate may include a rotation plate, the slant plate coupled
to one side of the rotation plate, a compression piston connected
to an edge of the slant plate, a slant control shaft connected to a
center of the slant plate with a variable pin arranged to rotate
with the slant plate for pushing or pulling the slant plate by a
hydraulic pressure being supplied thereto to control the slant
angle of the slant plate, a position guiding shaft arranged passed
through a center portion of the slant control shaft, a position
detecting sensor engaged to the position guiding shaft for
detecting a position of the position guiding shaft, and a control
unit for determining the slant angle of the slant plate with
reference to a signal from the position detecting sensor.
Inventors: |
Cha; Yong Woong; (Yongin-si,
KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Hyundai Motor Company |
Seoul |
|
KR |
|
|
Assignee: |
Hyundai Motor Company
Seoul
KR
|
Family ID: |
53481190 |
Appl. No.: |
14/312250 |
Filed: |
June 23, 2014 |
Current U.S.
Class: |
417/222.1 |
Current CPC
Class: |
F04B 27/1072 20130101;
F04B 49/125 20130101; F04B 27/18 20130101 |
International
Class: |
F04B 49/12 20060101
F04B049/12 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 30, 2013 |
KR |
10-2013-0167814 |
Claims
1. A variable compression system for controlling a slant angle of a
slant plate comprising: a rotation plate arranged to rotate with
reference to a rotation axis; the slant plate coupled to one side
of the rotation plate with a hinge arranged to rotate with the
rotation plate; a compression piston connected to an edge of the
slant plate arranged to reciprocate along the rotation axis by
rotation of the slant plate; a slant control shaft connected to a
center of the slant plate with a variable pin arranged to rotate
with the slant plate for pushing or pulling the slant plate by a
hydraulic pressure being supplied thereto to control the slant
angle of the slant plate; a position guiding shaft arranged passed
through a center portion of the slant control shaft for moving
according to movement of the slant control shaft; a position
detecting sensor engaged to the position guiding shaft for
detecting a position of the position guiding shaft; and a control
unit for determining the slant angle of the slant plate with
reference to a signal from the position detecting sensor.
2. The variable compression system of claim 1, wherein the control
unit controls to vary a compression capacity of the compression
piston which compresses a refrigerant with the slant angle of the
slant plate.
3. The variable compression system of claim 1, wherein the position
guiding shaft is connected to the variable pin to rotate with the
slant plate.
4. The variable compression system of claim 1, wherein the position
guiding shaft is arranged to rotate at the slant control shaft and
to move with the slant control shaft in a length direction of the
slant control shaft.
5. The variable compression system of claim 4, further comprising:
a securing flange formed on one side of the position guiding shaft,
and a securing cap fastened to an end portion of the slant control
shaft rotatably passed through the position guiding shaft for
fastening the securing flange to the slant control shaft in a
length direction thereof.
6. The variable compression system of claim 5, wherein a valve is
mounted to an outer circumference of the securing cap.
7. The variable compression system of claim 1, wherein the position
detecting sensor is a contact sensor which is in contact with the
position guiding shaft.
8. The variable compression system of claim 7, wherein the position
detecting sensor has a guide groove for guiding movement of the
position guiding shaft, the guide groove being matched with an
outside circumference of the position guiding shaft.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] The present application claims priority to Korean Patent
Application No. 10-2013-0167814 filed on Dec. 30, 2013, the entire
contents of which is incorporated herein for all purposes by this
reference.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present invention relates to a variable compression
system for controlling a slant angle of a slant plate to control a
reciprocating range of a piston for controlling a load of
refrigerant compression, and sensing the slant angle of the slant
plate, easily.
[0004] 2. Description of Related Art
[0005] A compressor applied to a vehicle is a variable capacity
compressor which has suction and discharge rates controlled by a
control valve and the slant plate mounted in the compressor,
automatically.
[0006] Since a major feature of the variable capacity compressor
lies on variable control of a flow rate of the refrigerant
throughout an entire operation range of a cooling load of an air
conditioner, no frequent compressor on/off control is required.
[0007] Owing to this, a range of a temperature change of discharge
air to a room which takes place when the compressor is turned
on/off may be reduced, enabling to secure uniformity of a room
cooling temperature.
[0008] In this case, a lower end of the slant plate is pushed to a
right side to reduce a slant angle thereof. If the slant angle of
the slant plate is reduced thus, a stroke of the piston mounted to
the slant plate is reduced to reduce the refrigerant discharge
rate, too.
[0009] And, if the slant angle of the slant plate and the operation
stroke of the piston become large, the refrigerant discharge rate
of the compressor also increases.
[0010] In the meantime, since a pressure of the refrigerant varies
with an external environment, even if the same control voltage is
applied, a position of the slant plate varies to vary a pumping
rate of the refrigerant. Consequently, calculation of a torque
required for operation of the refrigerant compressor is difficult,
to fail precise control of the refrigerant compressor, resulting in
failure in optimization of fuel consumption efficiency.
[0011] The information disclosed in this Background of the
Invention section is only for enhancement of understanding of the
general background of the invention and should not be taken as an
acknowledgement or any form of suggestion that this information
forms the prior art already known to a person skilled in the
art.
BRIEF SUMMARY
[0012] Various aspects of the present invention are directed to
providing a variable compression system in which a slant angle of a
slant plate is sensed more precisely, the slant angle of the slant
plate is controlled more precisely and quickly to calculate a
torque required for operation of a refrigerant compressor, to
control the slope angle of the slant plate quickly.
[0013] In an aspect of the present invention, a variable
compression system for controlling a slant angle of a slant plate
may include a rotation plate arranged to rotate with reference to a
rotation axis, the slant plate coupled to one side of the rotation
plate with a hinge arranged to rotate with the rotation plate, a
compression piston connected to an edge of the slant plate arranged
to reciprocate along the rotation axis by rotation of the slant
plate, a slant control shaft connected to a center of the slant
plate with a variable pin arranged to rotate with the slant plate
for pushing or pulling the slant plate by a hydraulic pressure
being supplied thereto to control the slant angle of the slant
plate, a position guiding shaft arranged passed through a center
portion of the slant control shaft for moving according to movement
of the slant control shaft, a position detecting sensor engaged to
the position guiding shaft for detecting a position of the position
guiding shaft, and a control unit for determining the slant angle
of the slant plate with reference to a signal from the position
detecting sensor.
[0014] The control unit controls to vary a compression capacity of
the compression piston which compresses a refrigerant with the
slant angle of the slant plate.
[0015] The position guiding shaft is connected to the variable pin
to rotate with the slant plate.
[0016] The position guiding shaft is arranged to rotate at the
slant control shaft and to move with the slant control shaft in a
length direction of the slant control shaft.
[0017] The variable compression system may further include a
securing flange formed on one side of the position guiding shaft,
and a securing cap fastened to an end portion of the slant control
shaft rotatably passed through the position guiding shaft for
fastening the securing flange to the slant control shaft in a
length direction thereof.
[0018] A valve is mounted to an outer circumference of the securing
cap.
[0019] The position detecting sensor is a contact sensor which is
in contact with the position guiding shaft.
[0020] The position detecting sensor may have a guide groove for
guiding movement of the position guiding shaft, the guide groove
being matched with an outside circumference of the position guiding
shaft.
[0021] In another aspect of the present invention, the variable
compression system can detect the slant angle of the slant plate
more precisely and quickly with the position detecting sensor which
detects a position of the position guiding shaft which is movable
by the slant plate and the slant control shaft.
[0022] The methods and apparatuses of the present invention have
other features and advantages which will be apparent from or are
set forth in more detail in the accompanying drawings, which are
incorporated herein, and the following Detailed Description, which
together serve to explain certain principles of the present
invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0023] FIG. 1 illustrates a cross sectional view of a variable
compression system for controlling a slant angle of a slant plate
in accordance with an exemplary embodiment of the present
invention, schematically.
[0024] FIG. 2 illustrates a partial perspective view of a variable
compression system for controlling a slant angle of a slant plate
in accordance with an exemplary embodiment of the present
invention.
[0025] FIG. 3 illustrates a partial perspective view of a variable
compression system for controlling a slant angle of a slant plate
in accordance with an exemplary embodiment of the present
invention.
[0026] FIG. 4 illustrates a partial sectional view of a variable
compression system for controlling a slant angle of a slant plate
in accordance with an exemplary embodiment of the present
invention.
[0027] It should be understood that the appended drawings are not
necessarily to scale, presenting a somewhat simplified
representation of various features illustrative of the basic
principles of the invention. The specific design features of the
present invention as disclosed herein, including, for example,
specific dimensions, orientations, locations, and shapes will be
determined in part by the particular intended application and use
environment.
[0028] In the figures, reference numbers refer to the same or
equivalent parts of the present invention throughout the several
figures of the drawing.
DETAILED DESCRIPTION
[0029] Reference will now be made in detail to various embodiments
of the present invention(s), examples of which are illustrated in
the accompanying drawings and described below. While the
invention(s) will be described in conjunction with exemplary
embodiments, it will be understood that the present description is
not intended to limit the invention(s) to those exemplary
embodiments. On the contrary, the invention(s) is/are intended to
cover not only the exemplary embodiments, but also various
alternatives, modifications, equivalents and other embodiments,
which may be included within the spirit and scope of the invention
as defined by the appended claims.
[0030] An exemplary embodiment of the present invention will
hereinafter be described in detail with reference to the
accompanying drawings.
[0031] FIG. 1 illustrates a cross sectional view of a variable
compression system for controlling a slant angle of a slant plate
in accordance with an exemplary embodiment of the present
invention, schematically.
[0032] Referring to FIG. 1, the variable compression system
includes a pulley 100, a rotation shaft 105, a slant plate 130, a
piston 110, a position guiding shaft 164, a compression chamber
120, a valve 112, a control valve 170, a control unit 160, a
position detecting sensor 162, a hydraulic chamber 186, a slant
control shaft 180, a slant plate hinge 140, and a rotation plate
150.
[0033] The pulley 100 receives a torque from an engine or a motor
for rotating the rotation shaft 105. There is the slant plate 130
arranged at one side edge of the rotation plate 150 which is
mounted on the rotation shaft 105 to be rotatable round the slant
plate hinge 140.
[0034] The variable compression system has a structure in which the
pulley 100, the rotation shaft 105, the slant plate hinge 140 and
the slant plate 130 rotate, simultaneously.
[0035] And, the compression piston 110 is arranged at an edge of
the slant plate 130 such that the compression piston 110
reciprocates in the compression chamber 120 following rotation of
the slant plate 130.
[0036] The slant control shaft 180 is arranged on the same axis
with the rotation shaft 105 connected to a center of the slant
plate 130, and the slant control shaft 180 has an end portion with
a valve 112 mounted thereto. The valve 112 is arranged in the
hydraulic chamber 186 to be movable by a hydraulic pressure being
supplied to the hydraulic chamber 186 to push/pull the slant
control shaft 180 for controlling a slant angle of the slant plate
130.
[0037] And, the hydraulic pressure being supplied to the hydraulic
chamber 186 is controlled by the control valve 170, and the control
valve 170 is controlled by the control unit 160.
[0038] In an exemplary embodiment of the present invention, the
position guiding shaft 164 is arranged passed through a center
portion of the slant control shaft 180 in a length direction such
that the position guiding shaft 164 moves in the length direction
together with the slant control shaft 180.
[0039] The position guiding shaft 164 may be connected to the slant
plate 130 with a variable pin so as to be rotatable together with
the slant plate 130. Or, alternatively, the position guiding shaft
164 may be fixedly secured to the slant control shaft 180 so as to
be movable with the slant control shaft 180.
[0040] FIG. 2 illustrates a partial perspective view of a variable
compression system for controlling a slant angle of a slant plate
in accordance with an exemplary embodiment of the present
invention, and FIG. 3 illustrates a partial perspective view of a
variable compression system for controlling a slant angle of a
slant plate in accordance with an exemplary embodiment of the
present invention.
[0041] Referring to FIGS. 2 and 3, the slant plate 130 may have the
variable pin 200 arranged across a center of the slant plate 130 to
which the slant control shaft 180 and the position guiding shaft
164 may be connected.
[0042] The position guiding shaft 164 has a circular cross section,
and the position detecting sensor 162 has one side with a guide
groove 420 formed therein. The position guiding shaft 164 may have
one side of an end portion outside circumference to be in close
contact with an inside circumference of the guide groove 420.
[0043] The position detecting sensor 162 detects a position of the
position guiding shaft 164 according to an area of contact to the
position guiding shaft 164 precisely, and transmits a signal
thereof to the control unit 160.
[0044] FIG. 4 illustrates a partial sectional view of a variable
compression system for controlling a slant angle of a slant plate
in accordance with an exemplary embodiment of the present
invention.
[0045] Referring to FIG. 4, the position guiding shaft 164 is
secured to the slant control shaft 180 with a securing cap 400.
[0046] In more detail, the position guiding shaft 164 has a
securing flange 410 formed on one side thereof, the position
guiding shaft 164 is arranged to pass through the securing cap 400,
and the securing cap 400 fastens the securing flange 410 to the
slant control shaft 180.
[0047] In this case, the position guiding shaft 164 may translate
with the slant control shaft 180 and the securing cap 400, and may
rotate at the slant control shaft 180 and the securing cap 400.
[0048] For convenience in explanation and accurate definition in
the appended claims, the terms "upper", "lower", "inner" and
"outer" are used to describe features of the exemplary embodiments
with reference to the positions of such features as displayed in
the figures.
[0049] The foregoing descriptions of specific exemplary embodiments
of the present invention have been presented for purposes of
illustration and description. They are not intended to be
exhaustive or to limit the invention to the precise forms
disclosed, and obviously many modifications and variations are
possible in light of the above teachings. The exemplary embodiments
were chosen and described in order to explain certain principles of
the invention and their practical application, to thereby enable
others skilled in the art to make and utilize various exemplary
embodiments of the present invention, as well as various
alternatives and modifications thereof. It is intended that the
scope of the invention be defined by the Claims appended hereto and
their equivalents.
* * * * *