KR100288226B1 - Manual valve of hydraulic control system for automatic transmission - Google Patents

Abstract

The hydraulic pressure is supplied while the line pressure is controlled in the 'P' and 'N' ranges to prevent damage to friction elements and deterioration of oscillation performance by sufficient lubrication hydraulic pressure, and a manual to measure the transmission oil level even in the 'P' range. For the purpose of providing a valve;

A second port, 'P' and 'N' range ports, and a third port, 'D' range port, are formed on one side of the first port where the line pressure flows, and the fourth port, 'R' range port, on the other side. And a valve body in which the first and second discharge ports are sequentially formed.

A first land having a connect portion on one side, and having a large width that can accommodate the second port and an end portion of the connect portion of the valve body in a neighborhood thereof, and a first land formed in a neighbor of the first land and formed at the 'P' range. A valve spool having a second land communicating the first port with the second port together with the first land, and a third land communicating the first port with the fourth port in the 'R' range. Made, and

The valve body is formed with a large diameter portion from the third port to the end of the connect portion is coupled to the end cap slidably supporting the first land of the valve spool, the valve spool is the first, second, third land Made of the same diameter, but the first land is provided to maintain the cap and the seal only in the 'D', '2', 'L' range provides a manual valve of the automatic transmission hydraulic control system for a vehicle.

Description

MANUAL VALVE OF HYDRAULIC CONTROL SYSTEM FOR AUTOMATIC TRANSMISSION}

The present invention relates to a manual valve of an automatic transmission hydraulic control system for a vehicle. More specifically, the hydraulic pressure is supplied so that the line pressure is controlled in the 'P' range so that the transmission oil amount can be measured even in the 'P' range. In addition, the present invention relates to a manual valve of a hydraulic control system that can prevent breakage of friction elements due to lack of lubrication at extreme low temperatures.

For example, referring to an example of a hydraulic control system of an automatic transmission applied to a vehicle, as shown in FIG. 1, a solenoid controlled by a transmission control unit (TCU) according to an opening degree and a vehicle speed of a throttle valve is acted on / off or duty. The shifting is effected by the valves.

That is, when the engine starts to drive, the torque converter 2 drives together and rotates the input shaft of the transmission. At this time, the oil pump 4 starts to generate and discharge oil pressure.

Part of the oil pressure generated at this time flows along the line pressure line 6 to the pressure regulating valve 8, the torque converter control valve 10, and the damper clutch control valve 12, and part of the reducing valve 14. And a manual valve 16.

The hydraulic pressure flowing to the pressure regulating valve (8) in the above is adjusted to the pressure is supplied to the torque converter control valve 10 and the damper clutch control valve 12, the hydraulic pressure supplied to the reducing valve 14 is lower than the line pressure The pressure is reduced by hydraulic pressure and supplied to the damper clutch control valve 12, the pressure control valve 18, and the NR control valve 20.

In this state, when the shift lever is switched to the 'D' range, the manual valve 16 supplies hydraulic pressure to the ND control valve 24 and the shift control valve 26 through the drive pressure line 22 in conjunction with this. .

Then, the shift control valve 26 is connected to the second, third, fourth, speed pipes 28 and 30 by the first and second shift control solenoid valves S1 and S2 controlled by the transmission control unit TCU. (32) supplies hydraulic pressure to the 1-2 shift valve 34 and the end clutch valve 36, the 2-3 / 4-3 shift valve 38 and the rear clutch release valve 40, respectively. .

In addition, the hydraulic pressure supplied to each of the 1-2 shift valve 34 and the end clutch valve 36, the 2-3 / 4-3 shift valve 38, and the rear clutch release valve 40 is controlled by pressure. It operates together with the hydraulic pressure supplied from the pressure control valve 18 controlled by the solenoid valve S3, so that the first, second, third, fourth, friction elements C1, C2, C3, and C3 are adapted to each shift stage. ) And (C4) by supplying the drive pressure, the shift is made.

And the fifth friction element (C5) to operate at the time of reverse operation is supplied by receiving the hydraulic pressure supplied from the manual valve 16 through the 2-3 / 4-3 shift valve (38).

The manual valve in the hydraulic control system of the automatic transmission is supplied with hydraulic pressure from the 'D' range to the drive pressure line as the port changes in conjunction with the selector operated by the driver, and the reverse pressure line from the 'R' range. To supply hydraulic pressure.

Looking at the conventional configuration of such a manual valve, as shown in Figure 8 (A), the valve body is the first port 200 to receive hydraulic pressure from the oil pump, and 'D', '2', 'L' range A second port 202 for supplying hydraulic pressure to the shift control valve (not shown) and a third port 204 for supplying hydraulic pressure to the pressure control valve in the 'N', 'D', '2', and 'L' ranges. And a fourth port 206 for supplying hydraulic pressure to the pressure regulating valve and the NR control valve in the 'R' range.

In addition, the valve spool 210 interlocked with the select lever has a connector portion 212 on one side and is located between the second and third ports 202 and 204 only in the 'P' range on the other side, and the second portion in the other range. The first port 214 located to one side of the port 202 and the third port 204 or the second and third ports 202 and 204 in the range except the 'P' R 'range are the first port. And a second land 216 communicating with the 200, and a third land 218 communicating with the first port 200 and the fourth port 206 in the 'R' range.

In addition, a discharge hole 222 communicating with the discharge path 220 formed from the connector 212 side is formed between the first and second lands 214 and 216.

Accordingly, the hydraulic pressure of the first port 200 is supplied to the third port 204 in the 'N' range as shown in FIG. 8A, and in the 'D' range as shown in (B) of the first port 200. Hydraulic pressure is simultaneously supplied to the second and third ports 202 and 204, and in the 'R' range such as (C), the hydraulic pressure of the first port 200 is supplied to the fourth port 206, and (D) In the 'P' range, the hydraulic pressure of the first port 200 is released along the discharge hole 222 and the discharge path 220.

However, in the manual valve as described above, since the hydraulic pressure supplied from the oil pump in the 'P' range is configured to be discharged through the valve spool, it is impossible to control the pressure regulating valve, so that a small amount of hydraulic pressure is applied to the torque converter through the orifice. Only is supplied.

Accordingly, there is a problem that the rapid oscillation performance is not good due to the lack of hydraulic pressure, as well as the breakage of the friction element as well as the delay of the hydraulic supply to the friction element during rapid start.

And since the oil is not supplied to each part in the 'P' range, there is a problem that can not measure the amount of oil, even if the measurement can not measure the exact amount.

Therefore, the present invention has been invented to solve the conventional problems as described above, the object of the present invention is to ensure that the hydraulic pressure is supplied while the line pressure control is made in the 'P' range to prevent breakage of the friction element and deterioration of the oscillation performance In addition, it provides a manual valve of a hydraulic control system that can measure transmission oil level even in the 'P' range.

1 is a schematic configuration diagram of a hydraulic control system to which the present invention is applied.

Figure 2 is a 'N' range state cross-sectional view of the manual valve according to the present invention.

3 is a cross-sectional view of the 'P' range of the manual valve according to the present invention.

Figure 4 is a cross-sectional view of the 'R' range state of the manual valve according to the present invention.

5 is a cross-sectional view of the 'D' range state of the manual valve according to the present invention.

Figure 6 is a '2' range state cross-sectional view of the manual valve according to the present invention.

Figure 7 is a 'L' range state cross-sectional view of the manual valve according to the present invention.

8 is a cross-sectional view of a conventional manual valve,

(A) is a sectional view of the 'N' range state.

(B) is a sectional view of the 'D' range state.

(C) is a cross-sectional view of the 'R' range.

(D) is a sectional view of the 'P' range state.

In order to realize the above object, the present invention is applied to a hydraulic control system of an automatic transmission for a vehicle in the manual valve in which the port conversion is made in conjunction with the driver's select lever operation,

A second port, 'P' and 'N' range ports, and a third port, 'D' range port, are formed on one side of the first port where the line pressure flows, and the fourth port, 'R' range port, on the other side. And a valve body in which the first and second discharge ports are sequentially formed.

A first land having a connect portion on one side, and having a large width that can accommodate the end of the connect portion of the valve body between the second port and the third port, and formed in the neighborhood of the first land. A second land communicating with the first land with the second port at the P 'range, and a third land communicating with the fourth port with the second land at the' R 'range; Holding valve spool, and

The valve body is formed with a large diameter portion from the third port to the end of the connect portion is coupled to the end cap slidably supporting the first land of the valve spool, the valve spool is the same as the first, second, third land It is made of a diameter, but the first land provides a manual valve of the automatic transmission hydraulic control system for a vehicle, characterized in that formed in the 'D', '2', 'L' range to maintain the seal with the cap.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

2 is a cross-sectional view of the 'N' range state of the manual valve according to the present invention, the manual valve 22 is composed of a valve body and a valve spool as before.

The valve body is formed in the vicinity of the first port 100 and the first port 100 connected to the line pressure line 6, the hydraulic pressure to the pressure control valve 8 in the 'N', 'P' range And controlling the hydraulic pressure supplied to the first port 100 in the 'D', '2', and 'L' ranges formed in the neighborhood of the second port 102 and the second port 102. The third port 104 is supplied to the means.

And a fourth port 106 formed at a predetermined distance from the second port 102 at a side opposite to the first port 100 to supply hydraulic pressure supplied to the first port 100 at an 'R' range. And a first discharge port EX1 disposed in the neighborhood of the fourth port 106 and discharging the hydraulic pressure supplied to the fourth port 106, and disposed in the neighborhood of the first discharge port EX1 and being 'N'. The second discharge port EX2 communicates with the fourth port 106 and the first discharge port EX1 in the ',' D ', 2', and 'L' ranges.

In addition, one side of the third port 104 is formed of a large diameter portion 108, the end of the cap 112 that can support the valve spool 110 is coupled, the inner diameter of the cap 112 is The inner diameter portion of the portion except for the large diameter portion 108 is the same.

The valve spool 110, which is embedded in the valve body and converts the port, has a connecting portion 114 formed at one side thereof, and a cap between the second port 102 and the third port 104 at a neighbor thereof. The first land 116 is formed to have a large width to accommodate the outer side of the 112, and the first land 116 is formed in the neighborhood of the first land 116 and formed together with the first land 116 in the 'P' range. The second land 118 communicating the first port 100 with the second port 102, and the first port 100 together with the second land 118 in the 'R' range, the fourth port 104 It has a third land 120 to communicate with.

The first, second, and third lands 116, 118, and 120 of the valve spool 110 have the same diameter, and the first land 116 has a 'D', '2', and 'L' range. Only the cut portion 122 was formed in the outer portion to be sealed while contacting the cap 112.

Accordingly, the residual pressure of the third port 104 is discharged in the 'P' range, and the residual pressure of the second and third ports 102 and 104 is discharged in the 'R' range.

According to the manual valve 16 of the present invention as described above, in the 'N' range, as shown in FIG. 2, the hydraulic pressure of the first port 100 is changed to the second port 102 by the second and third lands 118 and 120. Is supplied to the pressure regulating valve (8) to vary the line pressure. In the 'P' range, the hydraulic pressure of the first port 100 is transferred to the first and second lands 116 and 118 as shown in FIG. Is supplied to the second port 102 to vary the line pressure as in the 'N' range.

As such, varying the line pressure results in a sufficient supply of lubricating hydraulic pressure, thereby solving the problems caused by the application of a conventional manual valve.

In the 'R' range, as shown in FIG. 4, the hydraulic pressure of the first port 100 is supplied to the fourth port 106 by the second and third lands 118 and 120 so that the reverse shift is performed. In the D ',' 2 ', and' L 'ranges, as shown in FIGS. 5, 6, and 7, the hydraulic pressure of the first port 100 is controlled by the first and third lands 116 and 120. 102, 104.

According to the manual valve 16 for converting the flow path as described above, by supplying the hydraulic pressure supplied from the oil pump to the pressure regulating valve 8 in the 'P' range as in the 'N' range, the line pressure is varied. Line pressure is supplied to the torque converter 2.

Accordingly, it is possible to prevent the breakage of the friction element by supplying sufficient hydraulic pressure, it is possible to improve the oscillation performance during rapid start.

In addition, it is possible to perform the measurement of the amount of oil that was performed only in the conventional 'N' range in the 'P' range, thereby providing convenience for measuring the amount of oil.

As described above, according to the present invention, the hydraulic pressure is supplied while the line pressure is controlled in the 'P' and 'N' ranges, thereby preventing friction element damage and deterioration of the oscillation performance by sufficient lubricating hydraulic pressure, and the 'P' range. Is also an invention that can measure the transmission oil amount.

Claims (4)

In the manual valve that is applied to the hydraulic control system of the automatic transmission for the vehicle is connected to the driver's select lever operation, port conversion is performed, A second port, 'P' and 'N' range ports, and a third port, 'D' range port, are formed on one side of the first port where the line pressure flows, and the fourth port, 'R' range port, on the other side. And a valve body in which the first and second discharge ports are sequentially formed. A first land having a connect portion on one side, and having a large width that can accommodate the second port and an end portion of the connect portion of the valve body in a neighborhood thereof, and a first land formed in a neighbor of the first land and formed at the 'P' range. A valve spool having a second land communicating the first port with the second port together with the first land, and a third land communicating the first port with the fourth port in the 'R' range. Made, and The valve body is formed with a large diameter portion from the third port to the end of the connect portion is coupled to the end cap slidably supporting the first land of the valve spool, the valve spool is the first, second, third land Manual valve of an automatic transmission hydraulic control system for a vehicle, characterized in that the same diameter, but the first land is formed so as to maintain the cap and the sealing state only in the 'D', '2', 'L' range. The manual valve of an automatic transmission hydraulic control system for a vehicle according to claim 1, wherein one side of the third port of the valve body is formed with a large diameter portion. The manual valve of an automatic transmission hydraulic control system for a vehicle according to claim 1 or 2, wherein an inner diameter of the valve spool cap is equal to an inner diameter of a portion excluding a large diameter portion of the valve body. The hydraulic control system of an automatic transmission according to claim 1, wherein the first land of the valve spool is provided with a cutout portion in contact with the cap in the 'D', '2', and 'L' ranges to seal the cap. Manual valve.