JP3021932B2 - Mounting structure of high-speed on / off solenoid valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a high-speed on / off solenoid valve applied as a hydraulic control valve for an automatic transmission.

[0001]

2. Description of the Related Art Conventionally, as a structure for mounting a high-speed on / off solenoid valve, for example, the structure described in Japanese Utility Model Laid-Open Publication No. 64-55380 is known.

In the conventional source described above, the case 1 of the high-speed on / off solenoid valve is supported on the mounting portion 14 via the insulator 21 so that the transmission of valve vibration generated when the high-speed on / off solenoid valve operates to the mounting portion 14 is reduced. Techniques for suppression are shown.

[0003]

However, in the mounting structure of the conventional high-speed on / off solenoid valve described above, the mounting structure is such that the case 1 of the solenoid valve is opened to the outside. Problem. (1) When the high-speed on / off solenoid valve is installed at an oil level or higher and the air around the high-speed on / off solenoid valve is applied to an automatic transmission, the operating sound of the high-speed on / off solenoid valve is radiated to the outside. It becomes radiated sound, which is noise outside and inside the vehicle. (2) Since the drain port of the high-speed on / off solenoid valve is open to the outside, if the pressure in the flow path 19 and the inlet port 11 drops below the atmospheric pressure during the valve operation, air is sucked from the outlet port 12. As a result, the control pressure characteristics become unstable.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems. In the mounting structure of a high-speed on / off solenoid valve having a drain port that is open to the outside, the present invention is applicable to a high-speed on-off solenoid valve irrespective of the oil level or higher. in addition to the arc stabilize the control pressure characteristic with reduced radiated sound, and issues a possible to transfer suppression valve vibration to the control valve body causes no bracket function valve cover.

[0005]

The mounting structure of the high-speed on-off solenoid valve according to claim 1, wherein in order to solve the above Symbol challenges SUMMARY OF THE INVENTION, the entire high-speed on-off solenoid valve is covered by a valve cover, the outer periphery of the high-speed on-off solenoid valve Keep the hydraulic oil discharged from the drain port always full and at high speed
Turn off solenoid valve to control valve body and valve cover
It has a mounting structure that elastically supports it. That is, a high-speed on / off solenoid valve having a first drain port attached to the control valve body and open to the outside, and a valve cover fixed to the control valve body and provided so as to entirely cover the high-speed on / off solenoid valve. A solenoid valve outer peripheral chamber formed inside the valve cover so as to communicate with the first drain port, and a second drain opened at the uppermost position of the valve cover to communicate with the electromagnetic valve outer chamber. and the port, the high-speed on-off solenoid valve
And a button provided on the valve support of the control valve body.
D-side elastic body, the high-speed on / off solenoid valve and valve cover
And a cover-side elastic member provided on the valve support portion of the ー .

[0006]

The operation of the first aspect of the present invention will be described.

For example, in the case where the high-speed on / off solenoid valve is a three-way solenoid valve having a supply pressure port, an output pressure port, and a drain port, when a predetermined output pressure control command is input, the position at which the supply pressure port communicates with the output pressure port is set. And the position where the output pressure port communicates with the drain port is performed by a high-speed on / off operation of the valve. Then, when it is desired to obtain a high output pressure, the cycle of the on / off operation is constant, and the time distribution of the positions communicating the supply pressure port and the output pressure port is increased, and when it is desired to obtain a low output pressure, Controlling from the maximum output pressure of the supply pressure level to the minimum output pressure of the drain pressure level by setting the ON / OFF time distribution (duty ratio), such as increasing the time distribution of the position communicating the output pressure port and the drain port Output pressure can be obtained in the range. When the high-speed on / off solenoid valve is operated, an operating sound is generated by an on-off operation in which the valve body and the valve seat repeatedly hit.
A valve cover provided to entirely cover the high-speed on / off solenoid valve, an electromagnetic valve outer peripheral chamber formed inside the valve cover so as to communicate with the first drain port of the high-speed on / off solenoid valve, and an uppermost mounting portion of the valve cover A second drain port opened to communicate with the solenoid valve outer peripheral chamber at the position,
The outer periphery of the high-speed on / off solenoid valve is always filled with the hydraulic oil discharged from the first drain port, so the valve operating sound is damped by the hydraulic oil, reducing the radiation to the outside. Is done. In addition, since the outer periphery of the high-speed on / off solenoid valve is always filled with the hydraulic oil, even if the pressure of the output pressure port or the like is transiently reduced to the atmospheric pressure or less, air is discharged from the first drain port. There is no suction, the output pressure characteristics are stable, and in addition, even if the resistance of the first drain port increases at low oil temperature, damping force is generated both in and out of the hydraulic oil in the first drain port. ,
Output pressure characteristics are stabilized. Further, since the outer periphery of the high-speed on / off solenoid valve is filled with the hydraulic oil by the hydraulic oil discharged from the first drain port, the valve layout can be performed without considering the oil level. When applied, the degree of freedom in design is greatly increased, and the size and weight of the control valve unit can be reduced.

Since the valve cover is fixed to the control valve body, the valve cover functions as a bracket for attaching the high-speed on / off solenoid valve to the control valve body. Also, when the high-speed on / off solenoid valve is operated, vibration is generated together with the operating noise due to the on / off operation in which the valve body and the valve seat repeatedly come into contact with each other. By providing a cover-side elastic body in the valve support of the high-speed on-off solenoid valve and the valve cover,
Since the high-speed on / off solenoid valve is elastically supported by the control valve body and the valve cover, valve vibration is attenuated by the body-side elastic body and the cover-side elastic body, and transmission of valve vibration to the control valve body is suppressed.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. First Embodiment First, the configuration will be described. Figure 1 is a sectional view showing a mounting structure of high-speed on-off three-way solenoid valve of the first embodiment applied to an automatic transmission according to this invention of claim 1 Symbol mounting (corresponding to high-speed on-off solenoid valve). The mounting structure of the high-speed on / off three-way solenoid valve (hereinafter abbreviated as duty solenoid) of the first embodiment is a control valve body having a supply pressure oil passage 2a and an output pressure oil passage 2b as shown in FIG. 2, a supply pressure port 1a attached to the control valve body 2 and communicating with the supply pressure oil passage 2a and an output pressure port 1b communicating with the output pressure oil passage 2b.
And a duty solenoid 1 having a first drain port 1c open to the outside, a valve cover 7 provided to cover the entirety of the duty solenoid 1, and a first drain port 1c inside the valve cover 7. And a second drain port 7 opened to communicate with the valve outer peripheral chamber 8 at the uppermost position of the valve cover 7 where the valve cover 7 is mounted.
a.

In the duty solenoid 1, the supply pressure port 1a, the output pressure port 1b, and the first drain port 1c are formed, and a ball 1d is arranged at a position where the ports 1a, 1b, 1c communicate with each other. Ball 1d
Is pressed against the valve seat 1f by a spring 1e. A valve seat 1g is formed on the spring side of the ball 1d, and the ball 1d is pressed against the valve seat 1g against the spring force of the spring 1e by the electromagnetic force generated when the coil 1h is energized. These components are formed or incorporated in the valve case 1i.

The valve cover 7 is fixed to the control valve body 2 by bolts 9, and a seal ring 5 is provided to keep the valve outer peripheral chamber 8 formed by the two 2 and 7 oil-tight. ing.

O-rings 3 and 4 (corresponding to a body-side elastic body) are provided on the body-side support portion of the duty solenoid 1, and the duty solenoid 1 is connected to the control valve body via the O-rings 3 and 4. 2 supported. As shown in FIG. 2, vibration isolating rubber 6 (corresponding to a cover-side elastic body) is provided between the outer surface of the end plate 1j and the inner surface of the valve cover 7 by bonding. , And is supported by the valve cover 7 via the vibration isolating rubber 6.

Next, the operation will be described. (B) When the duty solenoid is mounted Duty solenoid 1 is connected to control valve body 2
When mounting on the valve cover, the duty solenoid 1 is inserted into the control valve body 2 and the second
The drain port 7a is arranged at the uppermost position in the attached state,
This is performed by fixing a valve cover 7 integral with the duty solenoid 1 with a bolt 9 by means of a vibration-proof rubber 6. That is, when the duty solenoid is mounted, the valve cover 7 serves as a mounting bracket for the duty solenoid 1. (B) Output pressure control action Since the supply pressure port 1a of the duty solenoid 1 is connected to the supply pressure oil passage 2a, the supply pressure is applied to the ball 1d. However, if no current is applied to the coil 1h of the duty solenoid 1, the ball 1d is pushed leftward in FIG. 1 by the spring 1e and is in contact with the valve seat 1f, and the output pressure port 1b is connected to the first drain port 1c. , And the supply port 1a and the output pressure port 1b are sealed by the ball 1d and the valve seat 1f. On the other hand, when a current is applied to the coil 1h,
The ball 1d is attracted to the right in FIG. 1 by the electromagnetic force, and the ball 1d contacts the valve seat 1g. In this state, the output pressure port 1b is connected to the supply pressure port 1a, and the output pressure port 1b is connected to the first drain port 1c.
Is sealed with the ball 1d and the valve seat 1g. Therefore, the coil 1 of the duty solenoid 1
By performing the PWM control on the time for energizing h, the output pressure can be obtained in a control range from the maximum output pressure at the supply pressure level to the minimum output pressure at the drain pressure level. That is,
When it is desired to obtain a high output pressure, the cycle of the on / off operation is constant. On time distribution for communicating the supply pressure port 1a with the output pressure port 1b is increased. The on / off time distribution (duty ratio) is set according to the output pressure to be obtained, such as increasing the time distribution of the position communicating the pressure port 1b and the drain port.

In this output pressure control, the hydraulic oil flowing out of the first drain port accumulates in the valve outer peripheral chamber 8, and flows out from the second drain port 7a to the outside when the valve outer peripheral chamber 8 is filled with the hydraulic oil. Since the hydraulic oil is always filled in the valve outer peripheral chamber 8 of the duty solenoid 1, even if the pressure in the output pressure oil passage 2b or the output pressure port 1b transiently drops to the atmospheric pressure or less. , First
Air is not sucked from the drain port 1c, and the output pressure characteristics are stabilized. In addition, even if the resistance of the first drain port 1c increases at a low oil temperature, a damping force is generated both in and out of the hydraulic oil in the first drain port 1c, so that the output pressure characteristics are stabilized. (C) Soundproofing and vibration-proofing action When the valve of this duty solenoid 1 is operated, an operating sound is generated by an on / off operation in which the valve body and the valve seat repeatedly hit.
A valve cover provided so as to cover the entirety of the duty solenoid 1, a solenoid valve outer peripheral chamber formed inside the valve cover in communication with the first drain port of the duty solenoid 1, and a valve cover at the uppermost position. With the configuration including the second drain port opened to communicate with the solenoid valve outer peripheral chamber, the valve outer peripheral chamber 8 of the duty solenoid 1 is always filled with the hydraulic oil discharged from the first drain port 1c. As a result, the valve operation sound is damped by the hydraulic oil, and the radiation sound to the outside is reduced. When the duty solenoid 1 is operated, the ball 1
O and O-rings 3 and 4 are provided on the duty solenoid 1 and the valve support of the control valve body 2, and the duty solenoid 1 and the valve are provided. By providing the vibration isolating rubber 6 on the valve support portion of the cover 7,
Duty solenoid 1 to control valve body 2
Further, since the valve vibration is elastically supported by the valve cover 7, the valve vibration is attenuated by the O-rings 3, 4 and the vibration isolating rubber 6, and the transmission of the valve vibration to the control valve body 2 is suppressed. (D) Determination of valve layout Even if the duty solenoid 1 is not disposed in the oil of the oil pan in an oil bath state, the operating oil discharged from the first drain port 1c is supplied to the valve outer peripheral chamber 8 of the duty solenoid 1 by the operating oil. The valve layout can be performed without considering the oil level because it has a structure that satisfies the oil level. When applied to an automatic transmission, the duty solenoid 1 can be arranged on the side of the transmission case where there is sufficient space. The degree of freedom in design is greatly increased, and the control valve unit can be reduced in size and weight by rationalizing the valve layout.

As described above, the mounting structure of the duty solenoid 1 according to the first embodiment has the following effects. (1) In the mounting structure of the duty solenoid 1 having the first drain port 1c open to the outside, the entire duty solenoid 1 is covered with the valve cover 7,
Since the mounting structure is such that the hydraulic oil discharged from the first drain port 1c is always filled in the valve outer peripheral chamber 8 of the duty solenoid 1, the radiation noise can be reduced regardless of the valve installation at or above the oil level. Control pressure characteristics can be stabilized. (2) The valve cover 7 is fixed to the control valve body 2 and the duty solenoid 1 is connected to the control valve body 2 by the O-rings 3 and 4 and the vibration isolating rubber 6.
And a structure that is elastically supported on the valve cover 7,
The valve cover 7 can be provided with a bracket function, and transmission of valve vibration to the control valve body 2 can be suppressed. Second Embodiment First, the configuration will be described. Figure 3 is a sectional view showing the mounting structure of the duty solenoid 1 of the second embodiment applied to an automatic transmission according to this invention of claim 1 Symbol mounting (corresponding to high-speed on-off solenoid valve). The duty solenoid 1 of the second embodiment is an example in which a second drain port 7a is opened at the upper end of the valve cover 7 in order to arrange the duty solenoid 1 on the transmission case of the automatic transmission. Note that the other configuration and operation and effect are the same as those of the first embodiment, and the corresponding components are denoted by the same reference numerals and description thereof is omitted.

Although the embodiments have been described with reference to the drawings, the specific configuration is not limited to the embodiments, and any changes or additions without departing from the scope of the present invention are included in the present invention. It is.

For example, in the embodiment, an example in which the high-speed on / off solenoid valve is applied to a high-speed on / off three-way solenoid valve has been described. However, the present invention can be applied to another type of high-speed on / off solenoid valve such as a two-way solenoid valve. I can do it.

The high-speed on / off solenoid valve means a valve which generates noise by valve operation, such as a duty solenoid, and an on / off operation at a long time interval like an on / off switching solenoid valve. Does not mean a valve whose ON / OFF valve operating speed is higher than a predetermined speed.

[0019]

According to the first aspect of the present invention, in the mounting structure of the high-speed on / off solenoid valve having the drain port opened to the outside, the entire high-speed on / off solenoid valve is covered with a valve cover, and the high-speed on / off is provided. Keep the outer periphery of the solenoid valve always filled with hydraulic oil discharged from the drain port and control the high-speed on / off solenoid valve.
Resiliently mounted to the valve body and valve cover. <br/> Even if the valve is installed at a level higher than the oil level , in addition to reducing radiation noise and stabilizing control pressure characteristics, An effect is obtained that the valve cover can be provided with a bracket function and transmission of valve vibration to the control valve body can be suppressed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a mounting structure of a high-speed on / off three-way solenoid valve (high-speed on / off solenoid valve) according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a cover-side support section taken along line AA of FIG.

FIG. 3 is a sectional view showing a mounting structure of a high-speed on-off three-way solenoid valve (high-speed on-off solenoid valve) according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Duty solenoid (High-speed on / off solenoid valve) 1c 1st drain port 2 Control valve body 7 Valve cover 7a 2nd drain port 3,4 O-ring (Body side elastic body) 6 Anti-vibration rubber (Cover side elastic body) 8 Valve Outer chamber (solenoid valve outer chamber)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16K 27/00-31/11

Claims (1)

(57) [Claims] 1. A high-speed on / off solenoid valve having a first drain port attached to a control valve body and opened to the outside, and fixed to the control valve body and provided so as to cover the whole of the high-speed on / off solenoid valve. A valve cover, a solenoid valve outer peripheral chamber formed inside the valve cover so as to communicate with the first drain port, and an uppermost position for mounting the valve cover, which is open to communicate with the electromagnetic valve outer chamber. A second drain port, the high-speed on / off solenoid valve and the control valve body;
The body-side elastic body provided on the valve support, and the high-speed on / off solenoid valve and the valve support of the valve cover are provided on the valve support.
Mounting structure for high-speed on-off solenoid valve, characterized in that it comprises a and a cover-side resilient bodies kicked.