JPH0463265B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a throttle valve that displaces the pressure regulating means of a throttle valve disposed in a hydraulic circuit of an automatic transmission in accordance with the throttle opening of an engine. Regarding equipment.

[Conventional technology]

As vehicles with automatic transmissions become more widespread, the irregular performance of automatic transmissions is also being evaluated harshly. In particular, the shift shock that occurs when changing the gear train and changing the gear ratio is evaluated intuitively, and even the slightest bit is a matter of concern. In order to alleviate or eliminate this shift shock, many methods and devices have been proposed and put into practical use.

In addition, the shift to front-wheel drive vehicles (front-engine/front-wheel drive)
Along with this, automatic transmissions are also required to be smaller and lighter.

By the way, the basic method of controlling automatic transmissions to smoothly shift gears is to change the pressure of the fluid that operates the frictional engagement means that governs gear shift control, that is, the main pressure, in response to the output of the engine. . Normally, the main pressure is changed by a throttle valve device that generates a pressure (throttle pressure) that corresponds to the throttle opening of the engine. Furthermore, this throttle pressure, in conjunction with the governor pressure corresponding to the vehicle speed, is also used as a signal for switching the shift control valve.

As a throttle valve device, one is known that converts the displacement of a cable connected to the throttle of an engine into rotational motion, transmits it to cam means, and this cam means also displaces and operates the valve element of the throttle valve. . This device uses a general rotary cam as the cam means, and the cam means is positioned facing a valve hole into which a throttle valve and a valve element in series with the throttle valve are fitted. It is supported by screwing shafts arranged at orthogonal positions to the valve body.

[Problem that the invention seeks to solve]

When trying to make automatic transmissions shift more smoothly, multiple throttle valves are used to generate pressure in each valve with different throttle pressure characteristics depending on various conditions. Therefore, it is desirable to control or operate corresponding equipment in the hydraulic circuit.

For this purpose, it is necessary to apply cam means to the two throttle valves and to separately set the displacement of the pressure regulating means of the throttle valves with respect to the circuit of the cam means as required.

However, on the other hand, as automobile transmissions are required to be smaller and lighter due to the shift to front-wheel drive automobiles, two throttle valve devices are housed in the limited space of the transmission case, and the throttle valves are There is a problem in that a cam means must be attached to each of the cam means and the throttle of the engine must be connected to each cam means.

Furthermore, in order to alleviate or eliminate the shift shock, it is necessary to operate the throttle valve with high precision.

However, with the configuration of conventional throttle valve devices, it is difficult to accurately drill the threaded hole for the shaft that supports the cam means in the valve body, and it is difficult to accurately drill the threaded hole for the shaft that supports the cam means, so it is necessary to ensure that the screwing position of the support shaft relative to the valve hole does not vary between products. Therefore, there was a problem in that the positioning had to be done carefully. Furthermore, this device may cause loosening of the threaded connection between the valve body and the shaft due to frequent camming.

This invention was made in order to meet the above requirements and solve the above problems,
Its purpose is to create a throttle that can be stored in a limited space within the transmission, and that the position of the shaft that supports the cam means does not change significantly depending on the mounting method, and that can respond to the engine's torque request signal (throttle opening, etc.). An object of the present invention is to provide a throttle valve device that can accurately generate pressure.

[Means for solving problems]

A throttle valve that is accommodated in a valve hole formed in the valve body and adjusts the hydraulic pressure to a predetermined pressure, a valve element that is displaced to change the adjustment action of the throttle valve, and a valve element that is disposed in the valve hole formed in the valve body. a bracket fixed to the valve body with a plane perpendicular to the axis and a plane parallel to the axis;
The cam means is rotatably mounted on a support shaft supported by this bracket and has a cam surface that displaces and operates the pressure changing means of the throttle valve, and an input signal for rotating the cam means is converted into a torque request signal of the engine. It comprises an input member that responds to the input signal, and a biasing means that applies rotational force to the cam means in opposition to the input signal.

Other aspects of the throttle valve device according to the present invention include:
at least two throttle valves disposed adjacent to each other in a hydraulic circuit of an automatic transmission, each having mutually parallel valve holes formed in a valve body and pressure regulating means displaceable within the valve holes; The first and second mounting portions include a first mounting portion having a surface perpendicular to the axis of the valve hole and a second mounting portion having a surface parallel to the plane containing the axis of each valve hole. A bracket that is removably fixed at a predetermined position on the valve body by abutting against the mounting surface of the valve body, a support shaft that is attached to this bracket and supported by the bracket, and mutually connected to each other around this support shaft. cam means having at least two cams that rotate integrally and displace the valve elements of the throttle valves facing each other; and cam means connected to the cams of the cam means to rotate each cam of the cam means in response to a torque request signal from the engine. Equipped with an input cable.

The first and second throttle valves are arranged adjacent to each other, but in this case the valve body can be of integral construction. The front face of the throttle valve is formed with a portion for mounting and fixing the mounting portion of the bracket, and the cam means assembled within the bracket is assembled in alignment with the valve element of the throttle valve.

When the second cam is interlocked with the first cam by the cam means, this can be done by a connecting means formed at the opposing boss ends of the quantity cam. Furthermore, if the cam means is provided with a stopper that comes into contact with the side surface of the valve element of the first throttle valve on the cam surface of the first cam, the rotational position of the first cam when the throttle opening is zero can be reliably determined. be able to.

Select a torsion spring as the biasing means,
This torsion spring is wound around the outer periphery between the first and second cams, one end of the torsion spring is fixed to either the first or second cam, and the other end is fixed to a cam other than the first and second cams. By fixing it at a certain point, it is possible to apply a rotational force to the cam means that opposes the input signal. In this way, an effective biasing action can be performed in a narrower space.

Furthermore, if a wire connected to the throttle of the engine is used as the input member and the wire is wound and guided around the outer periphery of the rotating cam, the torque required to rotate the cam can be reduced.

It goes without saying that the cam surfaces of the cams that apply displacement to the valve elements of the throttle valve in response to a torque request signal (for example, throttle opening) are each formed in a shape that provides desired throttle pressure characteristics.

When assembling the throttle valve device, first, both cams connected by a connecting means are housed in a roughly U-shaped bracket, and the support shaft is passed through the holes in both cams from the side of the bracket to rotatably support the cams. . Next, the mounting portions of the brackets are placed on predetermined positions on the front surfaces of the first and second throttle valves and fixed with fixing means such as bolts. Finally, an input member responsive to the engine's torque element signal, such as a wire connected to the engine's throttle, is wound and fixed around the outer periphery of the cam.

Note that the pressure regulating means refers to something that regulates the hydraulic pressure introduced into each slot valve from a hydraulic pressure source, and refers to, for example, a displaceable valve element provided in each slot valve.

[Effect]

In this throttle valve device, for example, when the accelerator pedal is depressed, the cam is rotated by an input member that is linked to the throttle of the engine, and the cam surface is formed to obtain desired throttle pressure characteristics in accordance with the throttle opening degree. changes the pressure regulating means by displacing the valve element (plunger) of the throttle valve. Since the first and second cams are set in correspondence with the first and second throttle valves, they generate throttle pressures that improve shift performance. Throttle pressure generated in each valve corresponding to the throttle opening can be used as back pressure to determine line pressure, allowing highly accurate pressure oil to be supplied to hydraulic equipment, and other One is to determine the precise switching timing of the shift valve by acting on the shift valve as a back pressure that opposes the governor pressure. Further, when the valve element is used as a switching valve for hydraulic equipment, the hydraulic equipment is operated accurately in correspondence with the throttle opening. When the amount of depression of the accelerator pedal is increased, the cam rotates further, and when the amount of depression is decreased, the cam is returned to its original position by the restoring force of the pressure regulating means or the urging means. Even when the throttle opening decreases, since both valves and the cam means are assembled in two directions on the bracket with integrity between the mounting part and the valve body, accurate throttle pressure corresponding to the throttle opening is generated. The hydraulic equipment can be operated accurately.

Embodiments Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

The first slot valve 1 shown in FIG. 2 is a throttle valve for shift control, and has an output port connected to one back pressure port of a plurality of shift valves.
The shift valve is operated in cooperation with the governor pressure connected to the other back pressure port, and the frictional engagement device connected to the shift valve is appropriately selected to perform gear changes corresponding to the throttle opening and vehicle speed. The first throttle valve 1 also issues a release signal to the lock-up relay valve when the throttle opening is near zero. The lock-up relay valve is a valve that receives a signal from the first throttle valve to release the direct connection between the pump and turbine of the torque converter.

The first throttle valve 1 includes a spool 4 with a spring 3 disposed on one side (left side in the drawing) in a valve hole 2a of a valve body 2, a plunger 5 disposed in series with the spool 4, and a plunger 5 between the spool 4 and the plunger. 5
Pressure regulating spring (pressure regulating means) installed between
6. Plunger 5 is guided by sleeve 7. The sleeve 7 is fixed to the valve body 2 by a pin 8. The spool 4 has three lands 10, 1 from the direction of the back spring 3.
1 and 12 are formed, and correspondingly three ports 13, 14, and 15 are formed in the valve body 2. In this example, lands 11 and 12 have the same diameter, and land 10 has a smaller diameter. The center port 14 is a pressure oil supply port from the pump, and the right port 15 is an output port, which is connected to the left back pressure port 13 via a throttle means, and further provides back pressure that counteracts the cabana pressure of the shift valve. connected to a port.

Plunger 5 also has three lands 16, 17, 1
Correspondingly, five ports 19a, 19 are formed in the valve body 2 via the sleeve 7.
b, 20a, and 20c are formed. The port 19a on the left side of the figure is connected to the port 13 on the spool 4 side, and when the throttle opening is approximately fully open,
From port 19b, shift valves such as 1-2 and 2
-Communicates with port 1 of the 3 shift valve. The output of port 19b in this case is used as a kickdown signal. The port 20a is provided very close to the land 18 of the plunger 5, and pump pressure is introduced near zero throttle opening. Port 20b is an output port and is connected to a back pressure port of a lock-up relay valve. Port 20c is located slightly to the left of output port 20b and is used as the exhaust port for the lock-up relay valve.

This first slot valve 1 is connected to the transmission case 22.
A lower valve body 26 is disposed below the valve body 2 with a gasket 24 and a plate 25 in between.
Furthermore, a strainer 28 is provided below.

The second throttle valve 31 is constructed as shown in FIG. This second throttle valve 31
is a throttle valve for controlling the main pressure, and by applying the hydraulic pressure adjusted according to the throttle opening as back pressure to the regulator valve, the pressure oil from the pump is adjusted to the throttle opening and the oil passage is controlled. Regulates the main pressure of

This second throttle valve 31 has a spring 33 mounted behind it on one side (left side in the figure) within a valve hole 32a of a valve body 32 that is integrally constructed adjacent to the valve body 2 of the first throttle valve 1 described above. the spool 34, the plunger 35 arranged in series with the spool 34, the spool 34 and the plunger 3
5 and a pressure regulating spring (pressure regulating means) 36. This plunger 35 is guided by a sleeve 37. The sleeve 37 is fixed to the valve body 32 by a pin 38.

Four lands 39, 40, 41, and 42 are formed on the spool 34 from the direction of the back spring 33. In this example, the lands 41 and 42 have the same diameter, the land 40 has a smaller diameter, and the land 39 has a larger diameter. Correspondingly, the valve body 32 has four ports 43, 4.
4, 45, and 46 are formed. Port 45 is the input port from the pump. The pressure oil whose pressure is regulated in the land 41 is outputted from the port 46. The port 46 is connected to the back pressure port of the regulator valve through a throttling means to the drain hole and to the cutback valve 10.
5 to the port 43 and to the port 44 via the throttle means, respectively. Cutback valve 105 operates under governor pressure to communicate ports 46 and 43.

Two lands 47 and 48 are formed on the plunger 35, and the land 47 has a larger diameter than the land 48, and one port 49 is formed on the valve body 32 through the sleeve 37. This port 4
9 is connected to a back pressure port 43 on the spool 34 side. Pressure oil input from the port 49 acts to move the plunger 35 to the left.

These two throttle valves 1, 31 are
As shown in the figure, they are arranged in parallel and adjacent to each other with their plunger sides aligned. The second
The throttle valve 31 is the first throttle valve 1
is placed in front of.

The cam means 50 includes a first cam 51 that displaces and operates the plunger 5 of the first throttle valve 1, and a plunger of the second throttle valve 31 that operates in conjunction with the first cam 51, as shown in FIGS. 35
It consists of a second cam 52 that displaces and operates.

The first cam 51 has a cam surface 53 formed on its outer periphery for displacing the plunger 5, and a boss 54 formed in the axial direction. As can be seen from Figure 2, the cam surface 5
3, when the throttle opening is zero, the plunger 5
a stopper 53 that determines the position of the cam 51 by contacting with the
A is provided. Similarly, the second cam 52 has a cam surface 55 formed on its outer periphery for displacing the plunger 35, and a boss 56 formed in the axial direction. Connecting means 57 (FIG. 4) is provided at the tips of the opposing bosses 54 and 56 so that the second cam 52 can rotate in conjunction with the first cam 51. The connecting means 57 in this example includes the first and second cams 51,
Both cams 51 and 52 are connected so that the cams 52 are parallel and interlocked.
Half of the tips of the opposing bosses 54 and 56 are cut out, and the remaining tip halves 58 and 59 are the opposing bosses 56 and 56, respectively.
It is designed to fit into the notch of 54. In addition to this example, the connecting means can also be configured such that tooth profiles formed on the side surfaces of both bosses 54 and 56 mesh with each other.

Bracket 60 (fifth bracket) housing cam means 50
) consists of substantially parallel side parts 62, 63 that are folded up from both sides of the bottom part 61, and first mounting parts 64, 65 and second mounting parts 66 that are bent from the both sides 62, 63, and the overall structure is approximately It is formed in a U-shape. The surfaces of the first mounting parts 64 and 65 are the valve bodies 2 and 3.
The second mounting portion 66 (FIG. 4) is bent in a plane perpendicular to the axes of the valve holes 2a and 32a formed in the second mounting portion 66 (FIG.
is bent into a plane parallel to the plane containing the two axes. The positions of the first mounting portions 64 and 65 can be determined at a distance of X with respect to the axis of the pin 8 as shown in FIG. Further, the position of the second mounting portion 66 can be determined at a distance Y with reference to the axis of the valve hole 2a. The reason why the pin 8 and the valve hole 2a are used as a reference is that it is easy to determine the positional relationship between the cam means and the port of the throttle valve, and it is also easy to determine the position when the throttle opening is zero. Bolt holes 67, 6 are provided in the respective mounting portions 64, 65, 66.
8,69 are formed. The bracket 60 is
Three bolts 70 are directly screwed onto the front surfaces of the valve bodies 2 and 32 which are integrally formed adjacent to each other.

The cam means 50 is located within the bracket 60.
It is supported by a support shaft 71 passing through both side parts 62 and 63. The position of the support shaft 71 in the bracket 60 is determined based on the above-mentioned X and Y dimensions.
As shown in the figure, the distances L from the end faces of the first mounting portions 64 and 65 and the distance M from the lower surface of the second mounting portion 66 can be accurately determined in correspondence with the valve holes 2a and 32a. Bearings 72 and 73 for smooth rotation are arranged between the support shaft 71 and the cam means 50, and between both the bearings 72 and 73, both the cams 5
A cylindrical holding member 74 that keeps the bosses 1 and 52 concentric is fitted on the inner periphery of both the bosses 54 and 56. Apart from this example, it is also possible to maintain the concentricity of both cams 51 and 52 by fitting a holding member to the outer periphery of both bosses 54 and 56. In this case, the above-mentioned connecting means can also be provided between the bosses 54, 56 of both cams and the holding member 74, and the connecting means in that case will be a spline fit. Note that the support shaft 71 is prevented from coming off by a snap spring 75 provided on the outside of the side portion 62, and is prevented from rotating by a member 76 provided on the outside of the side surface 63.

The biasing means 80 for returning the cam means 50 is composed of a torsion spring. The torsion spring 80 is connected to the boss 54 of both cams 51 and 52,
56, and one end 81 is connected to the first cam 51.
The other end 82 is fixed to a suitable part of the bracket 6.
The torsion spring 80 is locked to a hook portion 83 formed by cutting out a portion of the torsion spring 80 with a certain amount of twist applied to the torsion spring 80 itself (FIG. 6). One end 81 of the torsion spring 80 has a second cam parallel to the first cam.
It can also be locked to the cam 52.

The cam means 50 corresponds to the throttle opening of the engine.
As shown in FIG. 2, a cable 84 can be used as an input member for rotating the . One end of the cable 84 is connected to the throttle of the engine, and the other end is guided by a groove 85 formed on the outer periphery of the first cam 51 in a part that does not constitute the cam surface 53, and further connected to a locking piece 86 of the cable 84 at the tip. is locked in a recess 87 formed at an appropriate position on the outer periphery of the cam.

Note that rollers 88 and 89 are disposed at the tips of the planshas 5 and 35 that come into contact with the cam surfaces 53 and 55 of the first and second cams 51 and 52.
This ensures smooth rotation of the cams 51 and 52.

In assembling the throttle valve device having the above configuration, first, a torsion spring 80, which is a biasing means, is wound around the bosses 54, 56 of the first or second cams 51, 52, and a cylindrical The connecting means 57 of both cams 51 and 52 are fitted into the holding member 74 so as to face each other. Further, the bearings 72 and 73 are fitted from both sides so that the holding member 74 is located in the middle. Cam means 5 assembled in this way
0, the bracket 6 is placed so that both side surfaces are parallel to both sides 62 and 63 of the approximately U-shaped bracket 60.
It is stored from the upper part of the bracket 60, and the side part 6 of the bracket 60
Bearing 7 by support shaft 71 inserted from 3
2, 73 and the holding member 74. A snap ring 75 is fitted into the support shaft 71 from the outside of the side 62 of the bracket 60 to prevent it from coming off, and a member 76 is inserted from the outside of the opposite side 63 to prevent it from rotating. Next, one end of the torsion spring 80 is locked to an appropriate portion of the first cam 51, and the other end is twisted and locked to the hook portion 83 of the bracket 60. The bracket 60 assembled in this manner has the first mounting portions 64, 65 mounted on the front surface of the integrated valve bodies 2, 32, and the second mounting portions 64, 65 mounted on the surface perpendicular to the axes of the valve holes 2a, 32a. The portion 66 is connected to at least two of the valve holes 2a and 32a.
The valve body 2, 32 is screwed onto the main body of the valve body 2, 32 with a bolt 70 in a plane parallel to the plane containing the axis. As shown in FIGS. 1 and 8, the bracket 60 is directly fixed to the valve bodies 2 and 32 at three locations and in two directions, so the dimensional accuracy of the position is high, and errors in setting the throttle pressure due to the mounting method are minimized. be able to. Finally, the locking piece 86 of the cable 84 is fitted into the recess 87 of the first cam 51, and the cable 84 is placed in the groove 85 of the first cam 51. The rear end of the cable 84 is connected via a support member to, for example, an accelerator pedal, which is connected to the throttle operation of the engine.

[Effect]

In the throttle valve device of the present application, for example, when the accelerator pedal is depressed, the engine throttle opens according to the amount of depression, and in conjunction with this, the cable 84 wound and guided in the outer circumferential groove 85 of the first cam 51 is pulled. It is stretched. The first cam 51 is rotated by the cable 84 according to the amount of depression, and the second cam 52 is rotated in conjunction with the connecting means 57.

Each cam surface 53, 55 is rotated by the rotation of both cams 51, 52.
The plungers 5, 35 are driven within the sleeves 7, 37 via the rollers 88, 89 in contact with the plungers 5, 35, and the pressure regulating springs 6, 36 are deflected separately to apply different loads to each. This pressure regulating spring 6,
The supplied hydraulic pressure is regulated in accordance with the load of 36, and the respective throttle pressures are output from the output ports 15 and 46.

The throttle pressure also acts on the back pressure ports 13 and 44 of the respective valves 1 and 31, and the output port 1
When the amount of hydraulic oil coming out from 5, 46 increases and the throttle pressure decreases, the spool 4 retreats and the valve (land 11, 41) opens, and when the throttle pressure approaches the throttle pressure according to the throttle opening degree. At the same time, it provides a stable supply of hydraulic oil. Conversely, when the amount of hydraulic oil decreases, the spools 4 and 34 move forward to close the valves (lands 11 and 41) and regulate the throttle pressure to a predetermined level.

When the amount of depression of the accelerator pedal is reduced, both cams 51 and 52 are activated by pressure regulating springs 6 and 36.
Then, the torsion spring 80 rotates in the opposite direction until the accelerator is opened. Following this, the plungers 5 and 35 also operate, and the valve operations as described above are performed.

Next, the operation of this throttle valve device will be explained based on the hydraulic circuit diagram shown in FIG. In this figure, 100 is a pump, 101 is a regulator valve,
102 is a governor valve, 103 is, for example, a 2-3 shift valve, 104 is a lock-up control circuit, and 105 is a cut-back valve.

When the engine is started with such a circuit diagram, pressure oil is supplied from the pump 100 via the line L1 to the regulator valve 101, governor valve 102, and shift valve 10.
3. Input port 14 of first throttle valve 1;
19a, 20a and second throttle valve 31
is supplied to input port 45 of. Line L1 input to port 45 of second throttle valve 31
The main pressure is output as a throttle pressure from the port 46, which is regulated by the pressure regulating spring 36. This throttle pressure is applied to the spool 3 through the back pressure port 49 on the plunger 35 side and the orifice.
The throttle pressure is further regulated by feedback to the back pressure port 44 on the fourth side. The throttle pressure of the second throttle valve 31 is on line L2.
The main pressure of the line L1 is regulated by the regulator valve 101 to a pressure corresponding to the throttle opening degree.

The main pressure of the line L1 input to the port 14 of the first throttle valve 1 is output as a throttle pressure from the port 15, which is regulated by the pressure regulating spring 6. This throttle pressure is normally set to a different value from the throttle pressure of the second throttle valve 31. The throttle pressure of the first throttle valve 1 is applied to one back pressure port of the shift valve 103 via a line L5.

The governor valve 102 outputs an output according to the vehicle speed to the line L.
Output to 3. The output of line L3 acts as governor pressure on the other back pressure port of shift valve 103, that is, as throttle pressure, and also acts on one back pressure port of cutback valve 105.

When the amount of depression of the accelerator pedal, which is connected to the cam 51 by the cable 84, is shallow and the throttle opening is close to zero, the ports 20a and 20b of the first throttle valve 1 communicate with each other, and the main pressure of the line L1 becomes the line L1. It is output to the lockup control circuit 104 via L4. Lockup control circuit 1
04 operates the torque converter in its original operation while the pressure of line L4 is being input.

When the accelerator pedal is slightly depressed from around zero throttle opening, the cam 51 and the cam 52 interlocked with this cam 51 are rotated by the connected cable 84, and the ports 20b and 20c of the first throttle valve 1 are rotated. communicate. This communication eliminates the pressure in line L4, and lockup control circuit 104 directly connects the torque converter pump and turbine. Further, the rotation of the cam 51 displaces the plunger 5, compresses the pressure regulating spring 6, and increases the output of the port 15, increasing the output of the shift valve 103.
The force acting on it also increases. At the same time, the plunger 35 of the second throttle valve 31 is displaced by the rotation of the cam 52, the pressure regulating spring 36 is compressed, and the output of the port 46 is increased. As the output of the engine increases, the discharge force of the pump 100 also increases, but since the output of the port 46 of the second throttle valve 31 acts on the regulator valve 101, the main pressure in the line L1 becomes a pressure proportional to the throttle opening. . Furthermore, as the throttle opening increases, the vehicle speed increases, and the output of the governor valve 102 also rapidly increases.

Furthermore, when the throttle opening degree increases by depressing the accelerator pedal, the governor pressure acting on the shift valve 103 overcomes the throttle pressure of the first throttle valve 1, causing the shift valve 103 to switch and shift from L to H. .

When the accelerator pedal is further depressed and the throttle opening reaches around 85 degrees, the cam 51 rotates in conjunction with the cable 84, and the plunger 5 of the first throttle valve 1 is displaced, opening the ports 19a and 19.
b communicates. Due to this communication, the main pressure in line L1 acts on shift valve 103 through line L6 in opposition to governor pressure.

In addition to this operation, when the vehicle reaches a certain speed, the cutback valve 105 is operated by the governor pressure and the second
Port 46 and port 43 of throttle valve 31
communicate. Due to this communication, the output of the port 46 decreases and the amount of leakage at the regulator valve 101 increases, and the main pressure of the line L1 decreases and is maintained at a certain predetermined value.

The operation of reducing the amount of depression of the accelerator pedal to reduce the accelerator opening degree is performed by the reverse of the above operation. In this embodiment, the case where there are two throttle valves has been described, but the present invention is also applicable to the case where there is one throttle valve or the case where there are three throttle valves.

〔Effect of the invention〕

According to the present invention, the first and second throttle valves are arranged adjacent to each other, and the cam means is housed in the bracket and attached to the front surface of the valve body, so the entire throttle valve device can be made compact, and the transmission case can be easily mounted. It became possible to arrange two throttle valves in a limited space, attach cam means to each, and connect each cam to the throttle of the engine.

In addition, since the bracket is installed in direct relation to the valve body, errors in the set positional relationship between the cam means and the valve element are minimized, and the throttle pressure corresponding to the throttle opening can be accurately adjusted to each throttle valve. It became possible to generate Furthermore, since the position of the cam when the throttle opening is zero is regulated in relation to the plunger, it has become possible to perform an accurate sequence.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the present invention, Fig. 2 is a sectional view taken from the side shown in Fig. 1, Fig. 3 is a sectional view taken from the side shown in Fig. 1, and Fig. 4 shows a bracket housing the cam means. 5 is a sectional view taken along line AA in FIG. 4, FIG. 6 is a sectional view taken along line BB in FIG. 5, FIG. 7 is a left side view of FIG. Figure front view, No. 9
The figure is a hydraulic circuit diagram in which the throttle valve device of the present invention is used. 1... First throttle valve, 2, 32... Valve body, 2a, 32a... Valve hole, 5, 35
... Valve element, 6, 36 ... Pressure regulating spring, 31
...Second throttle valve, 50...Cam means,
51...First cam, 52...Second cam, 53,5
5... Cam surface, 54, 56... Boss, 57... Connection means, 60... Bracket, 61... Bottom, 6
2, 63... Side part, 64, 65, 66... Mounting part, 71... Support shaft, 74... Holding member, 80...
...Torsion spring, 84...Cable (input member).

Claims (1)

[Claims] 1. At least two throttle valves arranged adjacent to each other in a hydraulic circuit of an automatic transmission, each having mutually parallel valve holes formed in a valve body and a pressure regulating means displaceable within the valve holes;
a first surface having a surface perpendicular to the axis of each valve hole;
The first and second mounting portions include a second mounting portion having a surface parallel to a plane including the mounting portion and the axis of each valve hole.
A bracket that is removably fixed at a predetermined position on the valve body by having its mounting parts abut against the mounting surface of the valve body, a support shaft that is attached to this bracket and supported by the bracket, and a support shaft that is centered around this support shaft. a cam means having at least two cams that rotate integrally with each other and displace the valve elements of the throttle valve facing each other; and each cam of the cam means is connected to the cam of the cam means and responsive to a torque request signal of the engine. An automatic transmission throttle valve device with an input cable that rotates the.