JPH0320161A - Control valve unit for automatic transmission - Google Patents

Abstract

PURPOSE:To reconcile the favorableness of ground clearance and an increase in the degree of freedom of a layout for parts being set up in a lower valve under surface by constituting it to provide a closing plate which has not an oil passage and an oil groove installed in a plate mounting surface of a vehicle rear side under surface of a lower valve body. CONSTITUTION:In the lower part of a power train 1, there are provided an upper valve body 2 with an oil groove 2b on the under surface, a lower valve body 3 installed on an under surface of the upper valve body 2 in oil-tightness and with an oil groove 3c on a top surface and a vehicle longitudinal side under surface, and an oil strainer 4 installed on a strainer mounting surface 3d at a vehicle front side under surface. Then, a closing plate 5, which has not an oil passage and an oil groove, is installed on a plate mounting surface 3e on the vehicle rear side under surface of the lower valve body 3, at a rear position of the oil strainer 4. With this constitution, compatibility of the favorableness of ground clearance and an increase in the degree of freedom for a layout of parts to be set up the lower valve under surface is thus promoted.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a control valve unit that generates control hydraulic pressure to a coupling element, a torque converter, etc. of an automatic transmission.

(Prior Art) Conventionally, as a control valve unit for an automatic transmission, for example, "TYOTA A440L A440F Automatic Transmission Repair Manual J (198
The one described in 3-6 Transmission & Transfer Overhaul Cross-sectional Diagram published in November 2004) is known.

This conventional source includes an upper valve body that is placed at the bottom of the power train and has an oil groove on the bottom surface, and an oil-tight structure installed on the bottom surface of the upper valve body, in order to enable a complicated oil passage layout. a first lower valve body having an oil groove on an upper surface and a lower surface on the rear side of the vehicle; an oil strainer provided on a strainer mounting surface on a lower surface on the front side of the vehicle of the first lower valve body; and a rear position of the oil strainer; A control valve unit is shown that includes a second lower valve body having oil passages and oil grooves provided on a plate mounting surface on the lower surface of the first lower valve body on the rear side of the vehicle.

(Problem to be Solved by the Invention) However, in such a conventional control valve unit, a thick second lower valve body having an oil passage and an oil groove is provided on the lowest surface on the rear side of the vehicle. When laying out Yukiko control parts such as electronic control solenoids and harnesses in this control valve unit, or when expanding the oil strainer capacity, the ground clearance to the oil pan that covers the unit is lowered, and the electronic control parts and oil The degree of freedom in layout of strainers etc. is reduced.

That is, when laying out electronic control parts such as solenoids and harnesses for electronic control in a control valve unit, first avoid the oil strainer part on the front side of the vehicle near the oil pump.

Therefore, if the electronic control parts were laid out on the underside of the 207th valve body, the overall thickness of the unit would become extremely large.
The ground clearance to the oil pan that covers the unit is low, which is a disadvantage.

Further, if the electronic control parts are laid out around the second lower valve body, there is not enough space, and the degree of freedom in layout of the electronic control parts becomes low and difficult.

Similarly, when increasing the size of the oil strainer to increase the oil strainer capacity, there is not enough space and the degree of freedom in layout is reduced.

The present invention was made with attention to the above-mentioned problems, and is a control valve unit for an automatic transmission that enables a complicated oil passage layout by multi-stage hydraulic circuits. The challenge is to achieve both an increase in the degree of freedom in the layout of parts placed in the

(Means for Solving the Problems) In order to solve the above problems, in the control valve unit for an automatic transmission of the present invention, a closing plate having no oil passages or oil grooves is provided on the lowest surface of the lower valve body on the rear side of the vehicle. It was used as a means.

That is, an upper valve body is disposed at the bottom of the power train and has an oil groove on the lower surface, and a lower valve body is provided in an oil-tight manner on the lower surface of the upper valve body and has oil grooves on the upper surface and the lower surface on the rear side of the vehicle. an oil strainer provided on a strainer mounting surface on a lower surface on the vehicle front side of the lower valve body; and an oil passage provided on a plate mounting surface on a lower surface on the vehicle rear side of the lower valve body at a position rearward of the oil strainer; It is characterized by having a closing plate without an oil groove.

(Function) Since there is free space on the bottom surface of the closing plate, when laying out electronic control parts such as solenoids and harnesses for electronic control, the bottom surface of the closing plate and/or
The flexibility of component layout on the underside of the lower valve body is improved, such as allowing electronic control solenoids and thick and bulky harness connectors to be placed in the extra space around the closing plate.

(Example) Embodiments of the present invention will be described below based on the drawings.

First, the configuration will be explained.

FIG. 1 is an overall view showing an automatic transmission for FR vehicles to which the control valve unit of the example is applied, FIG. 2 is a partially cutaway view showing the control valve unit of the example, and FIG.
The figure is a bottom view showing the control valve unit of the embodiment as seen from below with the oil pan removed.

The control valve unit is arranged at the lower part of the power train 1, and includes an upper valve body 2 having an oil groove 2b on the lower surface of the body part 2a, and the upper valve body 2.
A lower valve body 3 is provided in an oil-tight manner on the lower surface and has oil grooves 3b and 3c on the upper surface of the pod body 3a and the lower surface on the rear side of the vehicle, and is provided on the strainer mounting surface 3d of the lower surface on the front side of the vehicle of the lower valve body 3. an oil strainer 4, a closing plate 5 having no oil passage or oil groove provided on the plate mounting surface 3e on the lower surface of the vehicle rear side of the lower valve body 3 at a rear position of the oil strainer 4, and a control valve unit. It is equipped with an oil van 6 that covers the entire area.

In addition to the oil groove 2b, a valve hole 2c is formed in the body portion 2a of the upper valve body 2 so that the valve spool can be stroked therein.

The lower valve body 3 is provided in an oil-tight manner on the lower surface of the upper valve body 2 via a gasket 7, and an oil passage is formed by an oil groove 3b of the lower valve body 3 and an oil groove 2b of the upper valve body 2. It is formed.

Further, in addition to the oil grooves 3b and 3c, a valve hole 3f is formed on the rear side of the vehicle in the poddy portion 3a.

Furthermore, in order to be more advantageous in terms of ground clearance, the plate mounting surface 3e is formed at a position one step higher than the strainer mounting surface 3d when viewed from the ground.

The oil strainer 4 is arranged to occupy the lower surface of the lower valve body 3 on the vehicle front side, and is bolted to the lower valve body 3. Since the oil pump 8 is provided on the front side of the vehicle, its discharge port 4a is inserted into the pump suction passage 8a, and the oil pump 8 is inserted into the pump suction passage 8a.
The suction port 4b is arranged approximately at the center of the .

The closing plate 5 is a steel plate having no oil passages or oil grooves, which is bolted to the plate mounting surface 3e of the lower valve body 3, but the oil groove 30 formed in the pod portion 3a of the lower valve body 3 is An oil passage is formed by closing the externally exposed portion.

As shown in FIG. 1, when an automatic transmission is mounted on a vehicle with a slight downward slope at the rear of the vehicle, the oil van 6 has a height relative to the ground on both the front and rear sides of the vehicle. The bottom plate is a slanted bottom plate 6a with a slight upward slope toward the rear of the vehicle so that the ground clearance is approximately the same.

A magnet 9 is placed at the bottom of the oil pan 6 to attract iron powder contained in the hydraulic oil.

Lenoids 10, 11, etc. for electronic control are fixed to the body portion 3a of the lower valve body 3, and an oil temperature sensor 12 is also arranged.

Electronic control parts such as the harness 13 and harness connector 14 that apply electricity to the solenoid 10.11 and the oil temperature sensor 12 are constructed by disposing a thick and bulky harness connector 14 on the lower surface of the closing plate 5, as shown in FIG. The harness 13 is arranged at a predetermined distance from the suction port 4b so that the suction port 4b is not blocked by suction of hydraulic oil by the oil strainer 4. Note that 15 is a harness bracket.

Next, the effect will be explained.

Solenoid for electronic control10. 11 and harness 13, etc., the solenoid 10 for electronic control is installed in the body part 3a of the lower valve body 3.
．． 11 is fixed, a thick and bulky harness connector 14 and an oil temperature sensor 12 are arranged in the lower surface of the closing plate 5 and the extra space around the closing plate 5, and the harness 13 is connected to the suction port 4b by sucking hydraulic oil by the oil strainer 4
The harness 13 is placed at a predetermined distance from the suction port 4b so as not to block the harness bracket 15.
This is done by fixing it to

As explained above, the automatic transmission control valve unit of the embodiment has the following features.

■ Since the oil groove 30 formed on the lower surface of the lower valve body 2 and the closing plate 5 can create a multi-stage hydraulic circuit, it is possible to achieve a 5-speed forward speed that requires a complicated oil passage layout. It can be applied as a control valve unit for multi-stage automatic transmissions such as one reverse speed.

■ There is an oil passage on the bottom surface on the rear side of the vehicle. Since the closing plate 5 without an oil groove is provided, a solenoid 10 for electronic control is provided. When laying out electronic control parts such as 11 and harness 13, a high degree of freedom in layout of the electronic control parts is ensured while ensuring ground clearance up to the oil pan 6 that covers the unit.

That is, even if the thick and bulky harness connector 14 is placed on the lower surface of the closing plate 5, the ground clearance can be maintained high, and the harness 13 can be placed at a suitable position at a predetermined distance from the suction port 4b of the oil strainer 4. can be placed.

■ Viewed from the ground, the plate mounting surface 3e is formed at a position one step higher than the strainer mounting surface 3d.In other words, the strainer mounting surface 3d, which is on the front side of the vehicle where it is relatively easy in terms of ground clearance, is lowered, so this strainer mounting The surface 3d acts as a reinforcing rib, and the body rigidity of the lower valve body 3 can be increased without adversely affecting the ground clearance.

The reason why the front side of the vehicle is relatively easy in terms of ground clearance is that, as mentioned in the explanation of the configuration above, when the automatic transmission is installed in the vehicle, it is mounted with a slight downward slope toward the rear of the vehicle. This is because that.

Although the embodiment has been described above based on the drawings, the specific configuration is not limited to this embodiment.

For example, in the embodiment, a preferable example is shown in which the plate mounting surface 3e is formed at a position one step higher than the strainer mounting surface 3d when viewed from the ground, but both mounting surfaces 3d and 3e may be formed on the same surface, and the embodiment may be different from the above. It may also be a surface with opposite steps.

(Effects of the Invention) As explained above, in the control valve unit for an automatic transmission of the present invention, there is a means for providing a closing plate having no oil passage or oil groove on the lowermost surface of the lower valve body on the rear side of the vehicle. Therefore, in the control valve unit of an automatic transmission, which enables the layout of complex oil passages by increasing the number of stages in the hydraulic circuit, the advantage of ground clearance and the increased degree of freedom in the layout of parts placed on the underside of the lower valve body have been achieved. The effect is that it is possible to achieve both.

[Brief explanation of drawings]

Fig. 1 is a side view showing an automatic transmission to which a control valve unit according to an embodiment of the present invention is applied, Fig. 2 is a partially cutaway view showing a control valve unit according to an embodiment, and Fig. 3 is a side view showing an automatic transmission using a control valve unit according to an embodiment of the present invention. FIG. 3 is a bottom view showing the control valve unit of the embodiment seen from above. 1...Power train 2...Upper valve body 2nd...Body section 2b...Oil groove 3.-0 Valve body 3a...Pody section 3b, 3c...Oil groove 3d...・Strainer mounting surface 3e...Plate mounting surface 4...Oil strainer 5...Closing plate 6...Oil pan

Claims (1)

[Scope of Claims] 1) An upper valve body disposed at the lower part of the power train and having an oil groove on the lower surface; and an upper valve body provided in an oil-tight manner on the lower surface of the upper valve body, and with oil on the upper surface and the lower surface on the rear side of the vehicle. a lower valve body having a groove; an oil strainer provided on a strainer mounting surface on a lower surface of the vehicle front side of the lower valve body; and an oil strainer provided on a plate mounting surface of the vehicle rear side lower surface of the lower valve body at a position rearward of the oil strainer. A control valve unit for an automatic transmission, characterized by comprising an oil passage provided therein and a closing plate having no oil groove. 2) The control valve unit for an automatic transmission according to claim 1, further comprising an electronic control component disposed on the lower surface of the closing plate. 3) The control valve unit for an automatic transmission according to claim 1 or 2, wherein the plate mounting surface is formed at a higher position when viewed from the ground than the strainer mounting surface.