JPS58160678A - Flow control valve - Google Patents

Abstract

PURPOSE:To enable the control of flow rate with high accuracy and response, by providing two pairs of coil-energized fixed poles in upper, lower, right and left positions around a rotor magnetized in the radial direction and by modifying the electric inputs to the fixed poles to set the rotational angle of the rotor and by interlocking the rotor with a valve spindle. CONSTITUTION:A rotor 2 has magnetic pole faces P1, P2 at both the ends in the radial direction. A first and a second fixed cores FC1, FC2 are placed around the rotor 2 and provided with coils CL1, CL2 and switches SW1, SW2 for supplying electricity to the coils. A variable resistor VR1 is connected to the coil CL2. When the switch SW1 is turned on, the rotor 2 is stopped in a position of 0 deg.. When the switch SW2 is turned on, the rotor 2 is located in an optional angle position from 0 to 45 deg. depending on the resistance of the variable resistor VR1. Therefore, the rotor 2 is used to control the opening and closing position of a valve.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flow control valve that controls the flow rate of fluid by applying current to an excitation coil.

Conventionally, as a flow control valve for air-fuel ratio A/F control, an electromagnetic solenoid t-
There are round ones and ones using a step motor.
As shown in Fig. 1, the one using an electromagnetic solenoid shows the air-fuel ratio μ change (1st
Change in output of 02 sensor corresponding to figure a) (Figure 1 b)
On the other hand, the electromagnetic V-noid starts up immediately due to proportional control as shown in Figure 1C, but due to the hysteresis characteristic of the electromagnetic solenoid, it is controlled even when the excitation current is increased and decreased when the excitation current is increased and decreased, including duty ratio control. The disadvantage is that the control characteristics change from 0 to 0' (dotted line duck) due to a decrease in suction force due to a rise in the temperature of the electromagnetic solenoid, since the spring is biased by the spring with a different flow wax. was there.

Also, if a step motor is used to drive the valve body, the control operation will be much easier! Although there is almost no IV gas and there are no awards for increasing the temperature, as shown in Figure 2, the stoichiometric air-fuel ratio is 14.
In response to the change in the output of the 02 sensor (No. 21b) corresponding to the change in the air-fuel ratio A/ji'' around 5 (Fig. 2 1), the step controller instantly rises as shown in Fig. 2 00. In addition to being unable to perform proportional control, the response of air-fuel ratio control is slightly delayed.
The disadvantage is that the step motor including the electric control circuit is extremely expensive compared to the electromagnetic solenoid.

The purpose of the present invention is to provide a flow control valve with high accuracy, high response, low cost and low cost, simple structure, and low cost, thereby eliminating the drawbacks of the conventional art. There are many things to do.

Next, the configuration of one embodiment of the present invention including its principle will be explained in the fifth section.
This will be explained using Figures to No. 9.

No. 5 is an original diagram of the rotor actuator 1 used for driving the valve body of the flow rate control valve, and shows the magnetic pole I of the rotor 2 magnetized at the 18 "position #1]1p1.pt, and the suction・mWdlJP of the first solid running core FC1 that can repel 3.P4
and s2m constant iron core re20ilW surface pS, P4 and circle 1
119 [3 times at 7" intervals, each fixed core FC
1, FC2 has the same specifications as Carp A/CL1. CL2 is
Batteries with the same specifications [#B1 and B2 are connected and installed in good condition through switches 8''F1 and 8W2, respectively, and the magnetizing current is adjusted to the coil IvCL2 of the second fixed iron core y'C2. A variable resistor VR1 is connected thereto.

Rotary actuator configured like Jin, Eta IKTh
Then, when *2 fixed iron core FC211x4 + SW2 is turned off and the first fixed iron core FC191 switch SW1 is turned on in good condition, the rotor 2 moves to its magnetic pole face P1. P2 and 1st
The magnetic poles #Jpg and p4 of the fixed iron core 1i'CI are opposed to each other and stopped in the 1Irf shape [1 (position ! in Fig. 3) of round magnetic pole attraction.

Next, when the switch 8W2 of the second fixed iron core FC2 is turned on in this suction stop state, the magnetic If surface p of the second fixed pig core FC2 in this coil 5yCL2 excitation state.5.
P4 is the magnetic pole face P1 of the rotor 2. It is magnetized into a gray layer magnetic pole that can attract P2.

Therefore, if the resistance value of variable resistor VR1 is made zero in this excited state, the magnetic pole faces p s, p of @2 fixed core FC2
4 and the magnetic pole face p5゜P4 of the first fixed core FC1 are:
As a result of both obtaining the same magnetomotive force, Low! 2 is the magnetic W
i-side P 1. p 2 as the magnet of the first fixed core rc1 @1il
iip1. It balances the attractive force of each magnetic pole from the perpendicular position indicated by the dotted line at t185 @ facing p2, and stops at the 45° position indicated by the 9th 3rd @ solid line, and the coil is connected via variable resistor VR1. 1 excitation current of CL2 is tl
The magnetomotive force 41In of the second fixed center CF2 caused by I4vrI moves the rotor 2 from the vertical 0 position shown by the dotted line in FIG. 5 to 111! [Kl! The area up to the 45@ position shown by the line is set as a full stop position and stopped at a can-shaped negative position, like this: OK, the coil CL1 is fixedly excited with an excitation current of 1, and the coil A/ If the excitation current of CL2 is simplified and the position of the pottery tomb of Ichita 2 changes, %fC
, this change characteristic, that is, the change in the rotation angle of the rotor 2, as shown in FIG.
Coil CL without F-s 1. CL2 is not affected by resistance changes caused by heat generation] A/C2 changes approximately in proportion to the current value O~1 of CL2.

Next, the companion flow rate control valve 3 used to excite the valve body lIK in the 1-II reactor 1' shown in FIG. 3 will be explained.

The main case 4 of the rotary breather 10 has a magnetic pole m
An 11 mm constant iron core F is made up of a sleeve-like play 5 forming a ps and a nine-flange-like play 6 forming a magnetic pole face P4.
C1, a tube-like support 7 forming a magnetic pole surface PS, and a flange-like support 8 forming a magnetic pole surface P6.
Fixed iron core F″C2 and each: 1wc L 1
．． The OL 2 is assembled and the axial play has been removed by the quadruple wire 98' and is attached together with the rear cover 10, and inside the main body case 4 there is a magnetic pole face P1. magnetized at the 1805 position. P2 is formed, and the rotor 2 is in good condition with the axial play removed by the wave gear 11, and is rotatably mounted on the bearings 12 and 13 assembled to the main body case 4 and the rear cover 10. , from the rear cover 10 there is a groove #1jf to improve airtightness.
A leash 15□ for each carp A/cL1°CL2 is pulled out through the fitting 14.

The front surface of the rotary actuator 1 formed in this way has a 2M fluid inlet 16°17 and an outlet 018,1? at the 180' position. The valve body 20 formed with the O-ring 21
Tightness through! The key 2 is attached to the shaft 23 of the rotor 2 in the valve body 20.
A valve body 25, which is integrally attached to the circumference by 4, forms a fluid flow passage between each inlet 17 and the outlet 018, 19, and the flow passage area of the valve hole 26 of the core flow passage. The rotor is mounted so as to be controllable in response to 20 rotation angles, and
The shaft 23 of the rotor 2 is assembled to the valve body 20, and shaft torsion is ensured by the nine bearings 27! is prevented.

8th flI! j is an example of the use of the round flow control valve 5 constructed in this way. In this case, the flow control valve 3 is a 02cm! 30. Attached to quarter jacket 31, nine water temperature sensors? 52,
A sulphur switch 5 is attached to the intake pipe 35 and operates in conjunction with the negative pressure sensor 54 and the throttle valve 35.
6 and 6 as sensor inputs, the main system 3? of the carburetor 38 is activated. and melody 4
0 auxiliary air bleed ii! 11? j4.

Next, the operation of this embodiment will be explained.

In this way, the flow control i-valve 5 installed as an air pressure control valve on the 4X converter 11138 receives the two-tary control from the control device 37 when the engine output is high, such as when starting. , Knee!1's Sui A/CL
A specified current is supplied only to rotor 1, and rotor 2
1, and move the flow control valve 50 valve body 25 to the 7th position.
Since the foreshadowing in the figure is located, both the main IA 39 and the auxiliary air bleed passages of the Sue system 40 are in the closed state.

Because rich fuel is supplied to the engine 28, when the engine output is low, such as during steady driving, for example,
An arbitrary excitation current is also supplied from the control device 37 to the switch 1kICLt of the actuator 1 in response to the low output, and the actuator 2, together with the valve body 25, is activated as shown in FIG. *It rotates approximately in proportion to the excitation current of CLz to control the supplementary aerosol ψ-de 0 air supply amount q of the main system 59 and Fukada system 40, and this foreshadowing causes the
and CI, 20 current value is Oka-Kt-J9 time K,
192 years old valve body 25 and 45 @) A/jC) It-Yuen turn and the flow rate control valve 3 reaches the maximum fpH degree, and this 11 electric state 11: $>hI4)s 4 w CL
Even if the magnetic currents t and CL to @ change due to temperature rise, the number 1 A/CL1. Rounding in which the attraction force by CL2 changes at the same ratio, the locking angle of the valve body 25 does not change, and each locking scissor center PCI, PC! The ship steps ψV are also struck by each other in the same ratio of rounding, and no step Ilv appears in the J11 divinity with respect to the excitation current of the valve body 2 and the valve body 25.

In addition, this four-tar attachment, Eta 1, has a high electrical response rate, uses a spring to balance the stop position of Data 2, and has a high holding force when stopped, and I2 has a high holding force when stopped. , for positioning the stop position, the flow rate control valve 5 for this - one tagliatana valve is a conventional electromagnetic type and step 4 #J3c.

Obtaining control characteristics and structure with only nine excellent points has its own effects.

Next, the 10th-1st and 11th rows are shown in Figure 3! This is another embodiment of the present invention in which the rotational motion of the rear breather 1 is converted into linear motion to control the needle type valve body. Acti, Eta 41's low! 41 rotational movement is caused by a screw shaft 44 screwed into a V-hole 43 of a rotor 42 and a t shown in FIG.
i! When the rotation consisting of the In stop bearing 45 is converted into linear 4-motion via the direct-coupling exchange mechanism, the needle type valve body 46 integrated with the threaded shaft 44 is rotated in the axial direction ( The configuration is such that the fluid inlet 48, 49 and outlet 50, 51 formed in the valve body 47, the valve hole 52 of the fluid flow path, and the flow path area can be controlled in accordance with the rotation angle of the rotor 420. , operation, and effect are almost the same as those of the embodiment described in 4111r.

In each of the above embodiments, the shapes of the nine valve holes 26.52 formed in the valve body 20.47 and the valve bodies 25, 46 can be arbitrarily set according to the required flow rate characteristics with respect to the excitation current. The flow control valve 3.53 of the embodiment is vaporized, i
f! In addition to controlling the air supply i* of the 38 auxiliary air lead, it also controls the rotation speed using a bypass type electronically controlled fuel injection device, control valve control using an exhaust gas recirculation device, and carburetor control. With the same characteristics as described above, it can also be used for control of engine speeds, governor control of ignition advance devices, and the like.

Next, the effects of the present invention will be explained.

The present invention has a valve hole gI# formed in the middle of a fluid flow path that communicates the fluid inlet and outlet of the valve body, and has at least 41 poles of the rotor magnetized in the Tsujia V direction and both the left and right sides of the rotor. A device that simultaneously attracts or repulses in the rotational direction and applies a rotational force in the desired direction to the rotor! A coil actuator that excites a coil A/pole in accordance with a can-shaped rotational angular position of the rotor. Set up eta, -, front distribution one tagliatachi,
A round flow rate control box is provided with a valve body that works in conjunction with the rotor of the rotor to control the flow path area of the valve hole of the valve body in accordance with the rotation angle of the rotor.

As a result, the present invention has the advantage that it is possible to obtain a flow control valve with high precision, high response, no hysteria, no negative impact, a relatively simple structure, and a low price.

[Brief explanation of drawings]

1 and 2 are operational characteristic diagrams of the conventional embodiment.
The figure is a detailed view of its main parts, Figure 8 is an explanatory diagram showing hints of its use, Figure 9 is a diagram of its operating characteristics, and Figure 10! I is other 1
! A cutaway side view of the embodiment, FIG. 11, shows details of the main parts thereof. 1.4l-W=riψattachi, eta Otsu 42-1'-voice 5.53...Flow rate control valve 16.17, 48, 4? -Inlet 18.1? ,
5 Q, 51-First-class outlet 25.46...Valve body 2 52-・Valve hole FCl...
・First fixed core F' C2-...Second fixed core CL
1, CL2... Coil Applicant: Aisan Industries Co., Ltd. Patent Attorney: Benba Shioka 1) Hidehiko No. 1 Figure 2: No.

Claims (1)

[Scope of Claims] A valve hole is formed approximately in the middle of the fluid flow 4 that communicates the fluid inlet and outlet of the valve body, and at least 1' of the rotor is magnetized in the direction V! At the same time in both the left and right rotational directions (attracting or repelling a fixed pole to apply rotational force in any direction to the rotor), the coil A/I/jll is attached to a fixed pole corresponding to any rotational angle position of the rotor. A magnetized rotary actuator is provided, and a valve body is provided that operates in conjunction with the rotary actuator of the rotary actuator and the rotor to control the flow passage area of the valve hole of the valve body in accordance with the rotation angle of the rotor. Characteristic flow control valve.