JP4793232B2 - Automatic transmission - Google Patents

Description

  The present invention relates to an automatic transmission including a transmission mechanism and a hydraulic control device that sets the gear position thereof, and more particularly, to an arrangement position of the hydraulic control device and an electronic control device that controls the hydraulic control device.

A control device that sets a gear position in the transmission mechanism includes a hydraulic circuit that supplies hydraulic pressure to the transmission mechanism, and an electronic control device that selectively energizes a solenoid valve in the hydraulic circuit. Usually, the hydraulic circuit is composed of an upper valve body and a lower valve body. That is, it is divided into upper and lower parts, and the hydraulic circuit is completed by combining both.
Japanese National Patent Publication No. 8-510317 JP 2002-12097 A JP-A-6-66357 JP 2005-69395 A.

  Patent Document 1 proposes to immerse the electronic control device in the stored oil in the casing of the transmission in order to save the installation space of the electronic control device. Patent Document 2 describes an electronic control device mounting structure in which a solenoid valve and an electronic control device are mounted on the outer upper surface of an upper valve body. Patent documents 3 and 4 disclose a combination of a valve body, an oil strainer and an oil pan.

  When an electronic control unit is installed on the outer top surface of the upper valve body, there is a gearshift mechanism directly above it. If there is a problem with the electronic control unit, remove the upper valve body from the transmission and replace the electronic control unit. There must be. It takes time to replace the electronic control unit. That is, serviceability is bad. Further, since an electronic control device installation space is required directly under the transmission mechanism, it is difficult to make the transmission mechanism lower part compact. Further, it is necessary to provide a space on the outer upper surface side of the upper valve body for allowing the hydraulic oil (ATF) cooled by the cooler to flow to the electronic control device unit for cooling the electronic control device. The housing takes up space.

The present invention is to facilitate the exchange of the electronic control device intended to constitute a compact hydraulic control apparatus including a hydraulic circuit and an electronic control unit directly under the transmission mechanism.

(1) speed change mechanism (5), the speed-change mechanism (5) to the hydraulic fluid valve body forming a hydraulic circuit for supplying and discharging (ATF), a solenoid valve attached to the valve body (SOL1-SOL6), and, In an automatic transmission (1) provided with an electronic control unit (VCU) for energizing the solenoid valve, the valve body (8, 9) has an upper oil passage mounted at a lower part of the transmission mechanism (5). A valve body (8) and a lower valve body (9) having a lower oil passage that opens in the upper oil passage, the lower valve body (9) is an oil passage (14 ) and has a through flow space (15) communicating with the communicating strainer (12) to the oil path, automatic, characterized in that said electronic control device (VCU) is disposed in the through-flow space (15) Transmission (1).

  In addition, in order to make an understanding easy, the code | symbol of the response | compatibility or the equivalent element of the Example shown in drawing and mentioned later in parentheses was added for reference as an example. The same applies to the following.

(2) speed change mechanism (5), wherein mounted on the lower portion of the transmission mechanism (5), the valve body above that binds to the oil passage of the mechanism has an upper oil passage for supplying and discharging hydraulic fluid (ATF) to the mechanism (8) , a lower oil passage opened to the upper oil passage, an oil passage (14) through which hydraulic oil cooled by a cooler flows, and a flow space communicating with the oil passage and communicating with the strainer (12) A lower valve body (9) with a solenoid valve (15), and a solenoid valve (SOL1--installed on the side of the upper valve body (8) and inserted in a hydraulic circuit constituted by the upper oil passage and the lower oil passage. and SOL6), the through-flow is arranged in a space (15), the automatic transmission characterized by comprising an electronic control device (VCU) energizing the solenoid valves (SOL1-SOL6) (1).

(3) Power is supplied to the solenoid of the solenoid valve, which is equipped with the electronic control unit (VCU) on the lower surface and is arranged in the flow space with the upper surface facing the upper wall surface of the flow space (15). Automatic transmission (1) according to claim 1 or 2, characterized in that it comprises an insulated conductor plate (16) with electrical conductors.

(4) Equipped with a strainer (12) on the inside, a hydraulic oil inlet (11) connected to the strainer (12), and a strainer housing (10) for closing the strainer storage space (15). The automatic transmission (1) according to any one of claims 1 to 3 , characterized in that:

(5) speed change mechanism (5), the speed-change mechanism (5) to the hydraulic fluid valve body forming a hydraulic circuit for supplying and discharging (ATF), a solenoid valve attached to the valve body (SOL1-SOL6), and, In the automatic transmission (1) including an electronic control unit (VCU) for energizing the solenoid valves (SOL1-SOL6) , the valve body (8, 9) is an upper side mounted on the lower part of the transmission mechanism (5). An upper valve body (8) having an oil passage and a lower valve body (9) having a lower oil passage that opens to the upper oil passage, and the lower valve body (9) is connected to the strainer housing (10L, 10U). An oil passage (14) through which hydraulic oil cooled by the communication cooler flows, and an oil passage (17) through which the hydraulic oil flows out from the strainer housing to the oil pump, and the electronic control unit (VCU) is connected to the strainer An automatic transmission (1) characterized by being housed in a housing (10L, 10U).

(6) A speed change mechanism (5) having a strainer (12) on the inside, a hydraulic oil inlet (11) connected to the strainer, and a strainer housing (10) for closing the strainer storage space (15) ; the is attached to the lower portion of the speed change mechanism (5), the hydraulic oil to the mechanism coupled to the oil passage of the mechanism and the valve body on that there is an upper oil passage for supplying and discharging (ATF) (8), said upper oil A lower oil passage that is open to the passage, an oil passage (14) that is communicated with the strainer housing (10L, 10U) and into which the hydraulic oil cooled by a cooler flows, and hydraulic oil that flows out from the strainer housing to the oil pump A lower valve body (9) having an oil passage (17), and a solenoid valve that is mounted on a side surface of the upper valve body (8) and inserted in a hydraulic circuit constituted by the upper oil passage and the lower oil passage (SOL1-SOL6) and, housed in the strainer housing (10L, 10 U) in said solenoids Automatic transmission characterized by comprising an electronic control device for energizing the valve (SOL1-SOL6) (VCU) (1).

(7) Equipped with the electronic control unit (VCU) on the lower surface and supplying power to the solenoid of the solenoid valve mounted on the upper wall with the upper surface facing the upper wall of the strainer housing (10L, 10U) The automatic transmission (1) according to claim 5 or 6, characterized in that it comprises an insulated conductor plate (16) with electrical conductors.

(8) The oil pan (20) is provided below the strainer housing (10), surrounds the strainer housing (10), and stores hydraulic oil. The automatic transmission (1) according to one.

(9) the lower valve body (9) is an automatic transmission according to any one of claims 1 to 8, characterized in that it is made of synthetic resin (1).

(10) The hydraulic oil inlet (11) of the hydraulic oil (ATF) provided in the strainer housing (10) and the electronic control unit (VCU) are arranged side by side in the front-rear direction of the transmission mechanism (5). The automatic transmission (1) according to any one of claims 1 to 9, characterized in that

(11) The automatic strainer according to any one of claims 1 to 10, wherein the strainer (12) is formed integrally with the lower valve body (9) and the strainer housing (10). Transmission (1).

  According to (1) above, since the electronic control unit (VCU) is in the flow space (15) communicating with the strainer (12) in the lower valve body (9), it is coupled to the lower valve body (9). The electronic control unit (VCU) can be replaced by removing the strainer housing or by removing the lower valve body (9) from the upper valve body (8). Exchange of electronic control unit (VCU) is easy.

  The lower valve body (9) has an oil passage (14) through which hydraulic oil cooled by a cooler flows, and a flow space (15) that communicates with the oil passage and communicates with the strainer (12). VCU) is in the flow space (15), so there is no need for an electronic controller arrangement space between the speed change mechanism (5) and the upper valve body (8), and the upper valve body (8) is located directly under the speed change mechanism. The following can be arranged compactly. In addition, the electronic control unit (VCU) is cooled by the hydraulic oil after being cooled by the cooler that flows to the strainer through the oil passage (14) and the flow space (15) in the lower valve body (9). In addition, a flow path for cooling the electronic control unit (VCU) is not required outside the valve body.

  According to the above (2), in addition to the effects described in (1) above being obtained, the solenoid valve (SOL1-SOL6) is mounted on the side of the upper valve body (8), so that the speed change mechanism The upper valve body (8) and below can be more compactly arranged directly below.

  According to the above (3), the electronic control unit (VCU) is highly cooled by the hydraulic oil cooled by the cooler, and the wiring from the electronic control unit (VCU) to the solenoid valve is compact.

  According to (4) above, if the strainer housing (10) is removed from the lower valve body (9), the electronic control unit (VCU) is exposed. Therefore, the electronic control unit (VCU) is unitized for easy replacement. be able to.

  According to the above (5), since the electronic control unit (VCU) is in the strainer housing (10L, 10U), by opening the strainer housing (10L) or the entire strainer housing (10L, 10U) (strainer The electronic control unit (VCU) can be replaced by removing the unit) from the lower valve body (9). Electronic control unit (VCU) replacement is even easier.

  An oil passage (14) through which the hydraulic oil cooled by a cooler flows into the lower valve body (9) and communicated with the strainer housing (10L, 10U) and an oil passage (17) through which the hydraulic oil flows from the strainer housing to the oil pump Since the electronic control unit (VCU) is in the strainer housing (10L, 10U), there is no need for an electronic control unit arrangement space between the transmission mechanism (5) and the upper valve body (8), and the transmission mechanism The upper valve body (8) and below can be compactly arranged directly below. In addition, the electronic control unit (VCU) is cooled by the hydraulic fluid after cooling by the cooler that flows in the strainer housing, so that the cooling effect is high and the flow for cooling the electronic control unit (VCU) outside the valve body. There is no need for a road.

  According to the above (6), in addition to the effects described in (5) above being obtained, the solenoid valve (SOL1-SOL6) is mounted on the side surface of the upper valve body (8), so that the speed change mechanism The upper valve body (8) and below can be more compactly arranged directly below.

  According to the above (7), the electronic control unit (VCU) is highly cooled by the hydraulic oil cooled by the cooler, and the wiring from the electronic control unit (VCU) to the solenoid valve is compact.

  According to (8) above, after removing the oil pan (20) that stores hydraulic oil and supplies it to the strainer, the lower valve body or strainer housing equipped with the electronic control unit (VCU) can be replaced. Even if the strainer housing is surrounded by the pan (20), the electronic control unit (VCU) can be easily replaced.

  According to the above (9), the oil passage (14) through which the hydraulic oil cooled by the cooler flows and the flow space (15) communicating with the strainer (12) can be easily formed, and the strainer housing A simple assembly structure can be adopted.

According to the above (10), the hydraulic oil inlet (11) of the hydraulic oil (ATF) provided in the strainer housing (10) and the electronic control unit (VCU) are arranged in the longitudinal direction of the transmission mechanism (5). Since they are arranged side by side, the valve body unit including the electronic control unit (VCU) can be compactly stored as compared with the case where the electronic control unit is arranged on the upper surface of the valve body and the strainer is arranged on the lower side.

  According to (11) above, the strainer (12) is formed integrally with the lower valve body (9) and the strainer housing (10). Automatic transmission (1) according to one. The strainer (12) is compact because the upper strainer housing can be eliminated.

Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the drawings.

[Example 1]
FIG. 1 shows an automatic transmission, that is, an automatic transmission (AT) 1 according to a first embodiment of the present invention. Between the input shaft 2 that is rotationally driven by a fuel engine and / or an electric motor and the output shaft 6 that outputs rotational power that rotationally drives the wheels, there are a torque converter 3, a hydraulic pump 4, and a forward / reverse transmission mechanism 5. A transmission control device 7 directly below the forward / reverse transmission mechanism 5 supplies / discharges hydraulic oil to / from each part of the transmission mechanism 5 to set the transmission mechanism to a specific speed stage. The main part of the transmission control device 7 is a vertically divided valve body (8, 9) having a hydraulic circuit for supplying and discharging hydraulic oil to and from each part of the transmission mechanism 5.

  FIG. 2 shows an enlarged view of the speed change control device 7 shown in FIG. 1, and FIG. A hydraulic circuit for driving the speed change mechanism is constituted by an integral combination of the upper valve body 8 and the lower valve body 9. In this embodiment, solenoid valves SOL 1 to SOL 6 for determining the range and speed stage of the speed change mechanism 5. Are mounted on the side surface of the upper valve body 8, and the plunger or spool for switching the oil passage or switching the oil passage, that is, the valve body, extends in the lateral direction x opened on the side surface of the upper valve body 8. It has entered the hole. A solenoid (electric coil) portion is located outside the upper valve body 8 (FIGS. 2 and 3).

  4 shows a cross section taken along line IV-IV in FIG. The lower valve body 9 is made of synthetic resin, and is supplied with ATF cooled by a cooler in addition to the hydraulic circuit 13 that supplies and discharges the hydraulic oil ATF to and from the transmission mechanism 5 in combination with the oil passage of the upper valve body 8. It has an inflow path 14, a flow space 15 that communicates with the inflow path 14 and communicates with the strainer 12, and an ATF outflow path 17 that flows from the strainer to the oil pump 4. A space from the flow space 15 to the outflow path 17 is open below the lower valve body 9. An insulated conductor plate 16 equipped with an electronic control unit VCU is fixed to the lower surface of the upper end of the space, that is, the upper wall surface below the hydraulic circuit 13, and the solenoid valves AOL1 to SOL6 are electrically connected by electric leads of the insulated conductor plate 16. Is connected to a solenoid driver (energization circuit) of the electronic control unit VCU. In addition to the solenoid driver, the electronic control unit VCU includes a microcomputer that decodes a shift mode instruction signal into a solenoid drive signal and gives the solenoid driver, and an electronic unit that communicates with a host (main) computer (not shown). is there.

  A strainer housing 10 equipped with a strainer 12 is closed at an opening opened downward in a space from the flow space 15 to the outflow passage 17 of the lower valve body 9. The strainer housing 10 has an ATF suction port 11 through which the inner space of the strainer 12 communicates. The suction port 11 is immersed in the stored oil in the oil pan 20 shown in FIG.

  The oil pump 4 of FIG. 1 sucks the ATF of the strainer 12 and sends it to a regulator valve (not shown) in the hydraulic circuit of the valve body (8, 9). The regulator valve regulates the pressure to a predetermined pressure (line pressure), and the line pressure ATF is output to each part of the hydraulic circuit. The hydraulic circuit supplies the transmission mechanism 5 and returns the transmission mechanism 5 to the hydraulic circuit. The ATF discharged from the speed change mechanism 5 is guided to a cooler (not shown) and cooled. The cooled ATF is returned to the inflow path 14 shown in FIG. 4, and this return ATF cools the electronic control unit VCU through the flow space 15 and enters the strainer 12. Part or all of the ATF returned to the strainer 12 is sucked by the hydraulic pump 4 through the outflow passage 17. When the ATF becomes excessive in the hydraulic circuit and the transmission mechanism 5, a part of the ATF that has returned to the strainer 12 through the inflow path 14 and the flow space 15 flows out into the oil pan 20 through the suction port 11. Conversely, when the ATF becomes insufficient in the hydraulic circuit and the transmission mechanism 5, the stored oil in the oil pan 20 is sucked into the strainer 12 through the suction port 11, and passes through the inflow path 14 and the flow space 15 to form the strainer 12. Together with the ATF returned to, it is supplied to the regulator valve via the oil pump 4.

  In the present embodiment, the upper edge of the synthetic resin strainer housing 10 is welded to the lower opening edge of the synthetic resin lower valve body 9 so that the strainer housing 10 is integrated with the lower valve body 9. Therefore, when replacing the electronic control unit VCU, the oil pan 20 is removed from the envelope (housing) of the transmission mechanism 5, and then the lower valve body 9 is removed from the upper valve body and replaced with a new one.

  However, the strainer housing 10 can be attached to and detached from the lower valve body 9, and the electronic control unit VCU or the insulated conductor plate 16 equipped with the electronic control unit VCU can be attached to and detached from the insulated conductor plate 16 or the lower valve body 9. There is also an aspect in which the electronic control unit VCU or the insulated conductor plate 16 equipped with the electronic control unit VCU is replaced after the strainer housing 10 is removed from the lower valve body 9.

[Example 2]
The outline of the second embodiment is the same as that of the first embodiment shown in FIG. 1, but the shift control device of the second embodiment is slightly different from that of the first embodiment. FIG. 5 shows a side view of the speed change control device used in the second embodiment, FIG. 6 shows a bottom surface, and FIG. 7 shows a cross section taken along line VII-VII in FIG. As shown in FIG. 7, in the second embodiment, the strainer housing made of synthetic resin is composed of an upper housing 10U that is an upper half and a lower housing 10L that is a lower half, and is equipped with an electronic control unit VCU. The conductor plate 16 is fixed to the upper wall of the upper housing 10U. The upper housing 10U and the lower housing 10L of the strainer housing are integrated by welding between synthetic resins, and the strainer housing (10U, 10L) is detachably attached to the lower valve body 9.

  Also in this embodiment, the lower valve body 9 is made of a synthetic resin, and is formed with a hydraulic circuit 13, an inflow path 14, and an outflow path 17.

  The upper housing 10U has an inlet of the return ATF after cooling communicated with the inflow passage 14 of the lower valve body 9, and a passage 15 in the housing is connected to the inlet. Further, the upper housing 10U has an ATF feed port that passes through the strainer 12, and communicates with the outflow passage 17 of the lower valve body 9. Other structures and functions of the second embodiment are the same as those of the first embodiment.

  Also in the second embodiment, the oil pump 4 (FIG. 1) sucks the ATF of the strainer 12 and sends it to the regulator valve in the hydraulic circuit. The regulator valve regulates the pressure to a predetermined pressure and outputs pressure oil to each part of the hydraulic circuit. The hydraulic circuit supplies the transmission mechanism 5 and returns the transmission mechanism 5 to the hydraulic circuit. The ATF discharged from the speed change mechanism 5 is guided to a cooler (not shown) and cooled. The cooled ATF is returned to the inflow path 14 shown in FIG. 7, and this return ATF cools the electronic control unit VCU through the passage space 15 and enters the strainer 12. Part or all of the ATF returned to the strainer 12 is sucked by the hydraulic pump 4 through the outflow passage 17. When the ATF becomes excessive in the hydraulic circuit and the transmission mechanism 5, a part of the ATF that has returned to the strainer 12 through the inflow path 14 and the flow space 15 flows out into the oil pan 20 through the suction port 11. Conversely, when the ATF becomes insufficient in the hydraulic circuit and the transmission mechanism 5, the stored oil in the oil pan 20 is sucked into the strainer 12 through the suction port 11, and passes through the inflow path 14 and the flow space 15 to form the strainer 12. Together with the ATF returned to, it is supplied to the regulator valve via the oil pump 4.

  Since the strainer housing in which the upper housing 10U and the lower housing 10L are integrally welded is detachably attached to the lower valve body 9, the oil pan 20 is attached to the outside of the transmission mechanism 5 when the electronic control unit VCU is replaced. After removing from the enclosure, the strainer housing is removed from the lower valve body 9 and replaced with a new one.

  However, the lower housing 10L of the strainer housing is detachable from the upper housing 10U, and the electronic control unit VCU or the insulated conductor plate 16 equipped with the electronic control unit VCU is detachable from the insulated conductor plate 16 or the upper housing 10U. There is also an aspect in which the electronic control unit VCU or the insulated conductor plate 16 equipped with the electronic control unit VCU is replaced after the lower housing 10L is removed from the upper housing 10U.

The automatic transmission of 1st Example of this invention is shown, The transmission mechanism parts 3-5 are longitudinal cross-sectional views, and the transmission control apparatus 7 is a side view. FIG. 3 is an enlarged side view of the shift control device 7 shown in FIG. 1. FIG. 3 is a bottom view of the shift control device 7 shown in FIG. 2. It is the IV-IV sectional view taken on the line in FIG. It is a side view of the shift control device 7 of the automatic transmission of the second embodiment. FIG. 6 is a bottom view of the transmission control device 7 shown in FIG. 5. It is the VII-VII sectional view taken on the line in FIG.

2: Input shaft 4: Hydraulic pump 6: Output shafts SOL1 to SOL6: Solenoid valve 11: Hydraulic oil inlet VCU: Electronic control unit

Claims (11)

In an automatic transmission comprising a speed change mechanism , a valve body in which a hydraulic circuit for supplying and discharging hydraulic oil to and from the speed change mechanism is formed, a solenoid valve mounted on the valve body , and an electronic control unit that controls energization of the solenoid valve.
The valve body includes an upper valve body having an upper oil passage mounted at a lower portion of the transmission mechanism, and a lower valve body having a lower oil passage that opens to the upper oil passage, and the lower valve body is a cooler . The lower valve body having an inflow path to which the hydraulic oil after cooling is supplied and an outflow path for the hydraulic oil flowing out from the strainer to the oil pump, and communicating with the strainer between the inflow path and the outflow path ; An automatic transmission , wherein a flow space formed by a strainer housing is formed, and the electronic control device is disposed in the flow space . The speed change mechanism, is mounted to a lower portion of the transmission mechanism, a valve body on which there is an upper oil passage for supplying and discharging hydraulic oil to the speed change mechanism attached to the oil passage of the transmission mechanism,
A lower oil passage opened to the upper oil passage, an oil passage through which the hydraulic oil after cooling by a cooler flows, and a lower valve body having a flow space communicating with the oil passage and communicating with a strainer ;
Said solenoid valve interposed in constituted the hydraulic circuit by the on are mounted on the side surface of the valve body the upper oil passage and a lower oil passage,
An automatic transmission, comprising: an electronic control unit that is disposed in the flow space formed by the lower valve body and a strainer housing and controls energization of the solenoid valve. Provided with the electronic control device on the lower surface, and an insulated conductor plate with an electric conductor for supplying power to the solenoid of the solenoid valve, disposed in the flow space with the upper surface facing the upper wall surface of the flow space The automatic transmission according to claim 1 or 2, characterized in that: 4. The strainer housing according to claim 1 , further comprising a strainer housing that is equipped with the strainer on the inside, has a hydraulic oil inlet connected to the strainer, and closes the strainer storage space. 5. Automatic transmission. In an automatic transmission comprising a speed change mechanism , a valve body in which a hydraulic circuit for supplying and discharging hydraulic oil to and from the speed change mechanism is formed, a solenoid valve mounted on the valve body , and an electronic control unit that controls energization of the solenoid valve.
The valve body includes an upper valve body having an upper oil passage mounted at a lower portion of the transmission mechanism, and a lower valve body having a lower oil passage that opens to the upper oil passage, and the lower valve body includes a strainer housing. The lower valve between the inflow path and the outflow path, the inflow path for supplying the hydraulic oil after cooling by a cooler and the outflow path for the hydraulic oil flowing out from the strainer housing to the oil pump An automatic transmission characterized in that the electronic control unit is housed in the strainer housing in a flow space formed by a body and the strainer housing . A strainer housing that is equipped with a strainer on the inner side, has a hydraulic oil suction port connected to the strainer, and closes the strainer storage space ;
Is attached to a lower portion of the transmission mechanism, a valve body on which there is an upper oil passage for supplying and discharging the hydraulic oil to the speed change attached to the oil passage of the transmission mechanism,
Lower oil passage open to the upper oil passage and the oil passage and the oil passage of the hydraulic oil flowing out of said strainer housing to the oil pump hydraulic oil cooled by the cooler communicating with the strainer housing flows is A lower valve body ,
A solenoid valve mounted on a side surface of the upper valve body and inserted in a hydraulic circuit constituted by the upper oil passage and the lower oil passage;
An automatic transmission comprising: an electronic control unit that is housed in the strainer housing in a flow passage formed by the lower valve body and the strainer housing, and that controls energization of the solenoid valve. . The electronic control device is provided on a lower surface, and an insulated conductor plate having an electric conductor for supplying power to the solenoid of the solenoid valve mounted on the upper wall with the upper surface facing the upper wall of the strainer housing. The automatic transmission according to claim 5 or 6, characterized in that Wherein there beneath the strainer housing surrounds the strainer housing, the automatic transmission according to any one of claims 4 to 7, characterized in that it comprises an oil pan for accommodating the hydraulic oil. The automatic transmission according to any one of claims 1 to 8, wherein the lower valve body is made of a synthetic resin. 10. The automatic operation according to claim 1, wherein the hydraulic oil suction port of the hydraulic oil provided in the strainer housing and the electronic control unit are arranged side by side in the front-rear direction of the speed change mechanism. transmission. The automatic transmission according to any one of claims 1 to 10, wherein the strainer is integrally formed with the lower valve body and the strainer housing.

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