KR100288225B1 - 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;

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,

The second port of 'P' and 'N' range ports, the third port of 'D' range ports, the fourth port of '2' range ports and the 'L' range on one side of the first port where the line pressure flows. A valve body in which a fifth port serving as a port is disposed, and a sixth port serving as an 'R' range port, and first and second discharge ports are sequentially formed on the other side;

The first port is connected to the sixth port with the first and second lands connecting the first port to the second port in the 'P' range and the second land in the 'R' range. And a valve spool having a third land which sequentially communicates the first port with the second, third, fourth and fifth ports in the 'N', 'D', '2' and 'L' ranges. ,

The valve spool has the same diameter of the first, second and third lands, and provides a manual valve of the hydraulic control system for a vehicle automatic transmission, characterized in that the thickness of the first land is smaller than the thickness of the second and third lands.

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. The present invention relates to a manual valve of a hydraulic control system in which a port for supplying control pressure during shifting of manual '2' and 'L' is prevented and the friction element is prevented 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.

The oil pressure generated at this time is controlled by the hydraulic pressure in the pressure regulating valve (6), a part of which is supplied to the torque converter (2) through the converter feed valve (8) and the converter clutch regulator valve (10), a part of the solenoid supply valve ( 12) and control switch valve 14, and manual valve 16, 1-2, 2-3, 3-4, 4-3 shift valves 18, 20, 22, 24 are supplied. .

The hydraulic pressure supplied to the solenoid supply valve 12 is depressurized again at the valve thereof to supply the control pressure of the torque control regulator valve 26, the pressure regulating valve 6, and the converter clutch regulator valve 10. The seven, five, four solenoid valves S7, S5, and S4 are controlled by these valves.

Then, the torque pressure generated according to the control of the seventh solenoid valve S7 is supplied to the control switch valve 14 to operate the sixth solenoid valve S6 controlling the valve 14. , 2-3 and 3-4 are sequentially supplied to the torque pressure to the shift valve 18, 20, 22.

In addition, the 1-2, 2-3 and 3-4 shift valves 18, 20 and 22 are connected to the second, third and fourth clutch valves 28, 30 and 32 so that these valves 18 The above-mentioned torque pressure and pressure regulating valve (6) are changed according to the shift stage while the port change is performed according to the operation of the first, second, and third solenoid valves S1, S2, and S3 controlling the The line pressure supplied from) is supplied to the respective friction elements B1, B2, B3, B4, C2 and C3 through the second, third and fourth clutch valves 28, 30 and 32. Done.

On the other hand, the forward pressure passing through the manual valve (6) in the forward range is supplied to the friction element (C1) continuously operated in the forward range through the ND control valve 34, and passes through the manual valve (6) in the reverse range One reverse pressure has a flow path configuration which is directly supplied to the friction element B1 and controlled at the NR control valve 36 and supplied to the friction element C2.

According to the above configuration, the rheo-conversion is performed by solenoid valves which are controlled by the transmission control unit (TCU) according to the opening degree and the vehicle speed of the throttle valve and operate on / off.

In such a hydraulic control system, a conventional configuration of a manual valve for converting a flow path according to a driver's selective operation will be described. As shown in FIG. 8A, the valve body is provided with a first port for supplying hydraulic pressure from an oil pump. 200), a second port 202 for supplying hydraulic pressure to a shift control valve not shown in the 'D', '2', and 'L' ranges, and 'N', 'D', '2', and 'L' And a third port 204 for supplying hydraulic pressure to the pressure control valve at the range and a fourth port 206 for supplying hydraulic pressure to the pressure control valve and the NR control valve at 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.

In addition, by providing a separate '2' range and 'L' range port, to provide a manual valve of the hydraulic control system that can be easily applied to the hydraulic control system that requires a separate control pressure.

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,

The second port of 'P' and 'N' range ports, the third port of 'D' range ports, the fourth port of '2' range ports and the 'L' range on one side of the first port where the line pressure flows. A valve body in which a fifth port serving as a port is disposed, and a sixth port serving as an 'R' range port, and first and second discharge ports are sequentially formed on the other side;

With the connecting part on one side, the first and second lands connecting the first port to the second port in the 'P' range in the neighborhood, and the first port and the sixth port together with the second land in the 'R' range. And a valve spool having a third land which sequentially communicates the first port with the second, third, fourth and fifth ports in the 'N', 'D', '2' and 'L' ranges. Lose,

The valve spool has the same diameter of the first, second, and third lands, and provides a manual valve of an automatic transmission hydraulic control system for a vehicle, characterized in that the thickness of the first land is smaller than the thickness of the fourth and fifth ports.

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 16 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 to be supplied to the means and the hydraulic pressure formed in the neighborhood of the third port 104 and supplied to the first port 100 in the '2' and 'L' ranges are supplied at a second speed control pressure. The fourth port 106 and the fifth port 108 formed in the neighborhood of the fourth port 106 to supply the hydraulic pressure supplied to the first port 100 in the 'L' range at the L speed control pressure Holds).

And a sixth port 110 disposed in a neighborhood of the first port 100 opposite the second port 102 to supply hydraulic pressure supplied to the first port 100 at an 'R' range, A first discharge port EX1 disposed in a neighborhood of the six ports 110 and discharging the hydraulic pressure supplied to the sixth port 110; and a 'N', 'disposed in the neighborhood of the first discharge port EX1; The second discharge port EX2 communicates with the sixth port 110 and the first discharge port EX1 in the D ', 2', and 'L' ranges.

In addition, the valve spool 112 embedded in the valve body for converting the port has a connecting portion 114 formed at one side thereof, and is formed at the neighboring side so that the second and third ports 102 and 104 are formed at the 'P' range. ), The first land 116 disposed in the middle of the fourth port 106 in the 'R' range, in the middle of the fifth port 108 in the 'N' range, and in one side of the fifth port 108 in the 'D' range. )Wow; It is formed at a predetermined interval in the neighborhood of the first land 116, and together with the first land 116, the first port 100 and the second, third, four, fifth port 102 (104) ( A second land 118 that sequentially communicates 106 and 108 one by one ports; The third land 120 is formed to be spaced apart from the second land 118 to accommodate the first, second, third, fourth and fifth ports in the 'L' range.

The first lands 116, 118, and 120 have the same diameter, and the first lands 116 have a thickness smaller than the fourth and fifth ports 106 and 108. do.

Accordingly, in the 'N' range, as shown in FIG. 2, the hydraulic pressure of the first port 100 is supplied to the pressure regulating valve 8 through the second port 102 by the second and third lands 118 and 120. In the 'P' range, the hydraulic pressure of the first port 100 is supplied to the second port 102 by the first and second lands 116 and 118 as shown in FIG. As in the N 'range, the line pressure is varied.

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 sixth port 110 by the second and third lands 118 and 120 so that the reverse shift is performed. In the D 'range, the hydraulic pressure of the first port 100 is supplied to the second and third ports 102 and 104 by the second and third lands 118 and 120, as shown in FIG. In the range, as shown in FIG. 6, the hydraulic pressure of the first port 100 is supplied to the second, third and fourth ports 102, 104 and 106 by the second and third lands 118 and 120. In the 'L' range, as shown in FIG. 7, the hydraulic pressure of the first port 100 is controlled by the second, third, fourth, and fifth ports 102, 104, 106 by the second, third lands 118, 120. 108, all of them will be in communication.

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.

In the above embodiment, it is described as having '2' and 'L' range ports. However, when the '2' and 'L' range control pressures are not required, these ports may be omitted.

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

Claims (1)

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, The second port of 'P' and 'N' range ports, the third port of 'D' range ports, the fourth port of '2' range ports and the 'L' range on one side of the first port where the line pressure flows. A valve body in which a fifth port serving as a port is disposed, and a sixth port serving as an 'R' range port, and first and second discharge ports are sequentially formed on the other side; The first port is connected to the sixth port with the first and second lands connecting the first port to the second port in the 'P' range and the second land in the 'R' range. And a valve spool having a third land which sequentially communicates the first port with the second, third, fourth and fifth ports in the 'N', 'D', '2' and 'L' ranges. , The valve spool has a diameter equal to that of the first, second and third lands, and the thickness of the first land is smaller than the thickness of the fourth and fifth ports.