KR20040049647A - A filter device for oil control valve of a continuously variable valvetiming system - Google Patents

Abstract

PURPOSE: A filter device for an oil control valve is provided to simultaneously filter and cool oil to be supplied to a CVVT(Continuously Variable Valve Timing) unit by forming a cooling housing in a filter. CONSTITUTION: A coolant supply passage is formed in a filter chamber to receive coolant from a coolant pump(141) of an engine. A coolant discharge passage(145) is formed to supply the coolant to a coolant gallery(147) correspondingly. A cooling housing is formed inside the filter chamber. A hollow coolant chamber is formed inside the cooling housing. Many oil cooling tubes are formed inside the coolant chamber. A coolant inlet and a coolant outlet are formed in the outer circumference of the cooling housing corresponding to a coolant inlet and a coolant outlet. A filter screen is installed in the cooling housing. An installing ring is installed in the other end of the filter screen. A combining bolt serves to install the filter screen in the filter chamber by fixing the filter screen through the installing ring. Thereby, the viscosity and the pressure of the oil are maintained in a fast operating area.

Description

Filter device for oil control valve of continuous variable valve timing system {A FILTER DEVICE FOR OIL CONTROL VALVE OF A CONTINUOUSLY VARIABLE VALVETIMING SYSTEM}

The present invention relates to a filter device for an oil control valve of a continuous variable valve timing system, and more particularly to an engine on one side of an oil control valve filter so as to lower the temperature of oil supplied to a continuous variable valve timing (CVVT) unit. A filter device for an oil control valve of a continuously variable valve timing system constituting a cooling housing in which cooling water is circulated.

An internal combustion engine engine is a device that generates power by sucking air and fuel from the outside and burning it in a combustion chamber. The engine includes an intake valve to suck the air and fuel into the combustion chamber, and discharges the explosive gas burned from the combustion chamber. An exhaust valve is provided, and this intake and exhaust valve is opened and closed by the rotation of a cam shaft which rotates in conjunction with the rotation of the crankshaft.

However, the optimum opening and closing timing of the intake and exhaust valves may vary depending on the height of the engine speed, the height of the engine load, and the like. Therefore, the rotation of the crankshaft does not determine the rotation of the camshaft definitely, but the technology to control the proper valve timing according to the driving situation of the engine by having a set displacement has been developed, which is variable valve timing (VVT) It is called a system.

Continuously Variable Valve Timing (CVVT) system is a kind of such variable valve timing system, and is configured to control the valve timing to an arbitrary value within a set displacement.

1 and 2, the configuration of a conventional continuous variable valve timing system will be described.

A conventional continuous variable valve timing system as described above includes an oil temperature detector 1 for detecting the temperature of a fluid used for valve timing control and a valve timing detector 3 for detecting valve timing.

As shown in FIG. 2, a space portion is formed in the CVVT case 7 which is integrally formed with the cam sprocket 5 that receives the rotational force of the crankshaft through a timing belt or the like, and the camshaft 9 is formed in the space portion. CVVT unit which bisects the vane (11; vane), and divides the space into an advance chamber (15) for advancing the valve timing by fluid flow and a perceptual chamber (13) for fluid valve flow. 10 is constituted.

In addition, the oil pump 21 which generates oil pressure by driving of the engine, and the oil pressure supplied from the oil pump 21 via the oil control valve filter device 23 are provided in the advance chamber 15 in the CVVT unit 10. ) And an electronic control to duty-control the oil control valve 25 based on a signal input from each of the detectors 1 and 3, and an oil control valve 25 to adjust a ratio supplied to the crust chamber 13. Unit 27 (hereinafter referred to as "ECU").

The fluid used for the valve timing control is an engine oil for lubricating each operating part of the engine. Accordingly, the oil pump 21 removes the oil filter 31 from the oil pan 29 installed in the lower part of the engine. After the oil is sucked and supplied to the main gallery, a part of the oil is supplied to the oil control valve 25.

In the CVVT system having such a configuration, the conventional configuration of the filter device 23 for the oil control valve is supplied from the oil pump 21 to one inner side of the cylinder head 33, as shown in FIG. An oil supply pipe (35) receiving oil to be supplied, and a filter chamber (39) connected to each of the oil discharge pipe passages (37) for introducing oil from which foreign substances have been removed into the oil control valve (25), In the filter chamber 39, a filter 49 formed by connecting a mounting ring 45 fitted to the filter guide ring 41 and the fastening bolt 43 to the oil supply line 35 by a filter net 47 is disposed. do.

The fastening bolt 43 is fastened to the tip of the filter chamber 39 of the cylinder head 33 via the washer 51.

Therefore, the filter device 23 for the oil control valve as described above guides the oil supplied from the oil pump 21 to the oil control valve 25 to pass through the filter network 47 so that foreign matters are contained in the oil. Only the bay will be removed.

However, as described above, the continuously variable valve timing system is driven by using engine oil. In the high speed operation region in which the oil temperature (110 ° C. or more) is excessively increased, the viscosity of the oil is lowered and the oil pressure is lowered. This implies that the operation of the CVVT becomes poor.

Accordingly, the present invention has been invented to solve the above problems, an object of the present invention is to configure the cooling housing in which the engine coolant is circulated on one side of the filter for the oil control valve and at the same time filtering of the oil supplied to the CVVT unit, To provide a filter device for an oil control valve to achieve a cooling action.

1 is a block diagram of a general continuous variable valve timing system.

2 is a detailed configuration cross-sectional view of the conventional continuous variable valve timing system according to FIG.

3 is a cross-sectional view of a conventional oil control valve filter device applied to the portion A of FIG.

4 is a configuration diagram of a continuously variable valve timing system to which the filter device for oil control valves according to the embodiment of the present invention is applied.

5 is a cross-sectional view of a filter device for an oil control valve according to an exemplary embodiment of the present invention applied to part B of FIG. 4.

6 is a perspective view of a cooling housing according to an embodiment of the present invention.

The filter device for oil control valve of the continuous variable valve timing system of the present invention for achieving the above object, in the continuous variable valve timing system, to remove the foreign matter contained in the oil supplied from the oil pump to the oil control valve, Continuously variable valve timing system configured in the filter chamber by forming a filter chamber connected to an oil supply pipe receiving oil from the oil pump and an oil discharge pipe supplying oil to the oil control valve on one side of the head. In the filter unit for the oil control valve

The filter chamber forms a cooling water supply line through which the cooling water is supplied from the cooling water pump of the engine on one side thereof, and forms a cooling water discharge line for supplying the cooling water to the cooling water gallery. A closed hollow cooling water chamber is formed, and a plurality of oil cooling tubes are disposed in the cooling water chamber in a transverse direction, and an outer circumferential surface of the cooling water flows into the cooling water chamber corresponding to the cooling water supply line and the cooling water discharge line. A cooling housing configured to form a cooling water inlet and a cooling water outlet for discharging the cooling water, the cooling housing being disposed corresponding to the oil supply line; A filter net having one end mounted on one side of the cooling housing; A mounting ring mounted at the other end of the filter network; It characterized in that it comprises a fastening bolt for fixing the filter net through the mounting ring for mounting the filter net in the filter chamber.

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

4 is a configuration diagram of a continuous variable valve timing system to which a filter device for an oil control valve according to an exemplary embodiment of the present invention is applied, and FIG. 5 is an oil control valve according to an exemplary embodiment of the present invention applied to part B of FIG. 4. 6 is a cross-sectional view of a cooling device according to an embodiment of the present invention. First, a configuration of a continuously variable valve timing system to which the present invention is applied will be described with reference to FIG. Oil temperature detector 101 for detecting the temperature of the fluid used in the valve and valve timing detector 103 for detecting the valve timing.

A space portion is formed in the CVVT case 107 integrally formed with the cam sprocket 105 which receives the rotational force of the crankshaft through a timing belt or the like, and a vane (not shown) connected to the camshaft 109 is formed in the space portion. The CVVT unit 100 constitutes the space part by dividing the space into an advance chamber (not shown) for advancing the valve timing by fluid flow and a perception chamber (not shown) for fluid valve flow. do.

In addition, the oil pump 121 which generates oil pressure by driving of the engine, and the oil pressure supplied from the oil pump 121 through the oil control valve filter 123 are provided in the advance chamber in the CVVT unit 100 (not shown). And an oil control valve 125 for adjusting a rate of supply to the crust chamber (not shown), and an electronic control unit for duty controlling the oil control valve 125 based on signals input from the detectors 101 and 103. 127 " ECU " hereinafter).

The fluid used for the valve timing control is an engine oil for lubricating each operating part of the engine. Accordingly, the oil pump 121 removes the oil filter 131 from the oil pan 129 installed at the lower part of the engine. After the oil is sucked and supplied to the main gallery, a part of the oil is supplied to the oil control valve 125.

In the continuously variable valve timing system having such a configuration, the oil control valve filter device 123 of the present invention, as shown in Fig. 5, to the oil supplied from the oil pump 121 to the oil control valve 125 In order to remove the foreign matter included, the inner side of the cylinder head 133, the oil supply pipe 135 to supply oil to the oil supply pipe 135 and the oil control valve 125 to receive the oil from the oil pump 121 Each of the filter chambers 139 is connected to form a filter chamber 139, and the filter chamber 139 forms a cooling water supply line 143 for receiving cooling water from the cooling water pump 141 of the engine on one side thereof. As a result, a cooling water discharge line 145 for supplying cooling water to the cooling water gallery 147 is formed.

As shown in FIG. 6, in the filter chamber 139, a cooling housing 153 having a cylindrical shape to form a hollow cooling water chamber 151 sealed therein is the oil supply pipe 135. It is disposed corresponding to the side.

The cooling water chamber 151 of the cooling housing 153 includes a plurality of oil cooling tubes 155 disposed in a transverse direction, and the cooling water supply pipe 143 and the cooling water discharge pipe are formed on the outer circumferential surface of the cooling housing 153. Corresponding to the furnace 145 is formed by forming a coolant inlet 157 for introducing the coolant into the coolant chamber 151 and a coolant outlet 159 for discharging the coolant.

A filter net 161 is mounted on one side of the cooling housing 153 opposite to the oil supply line 135, and a mounting ring 163 is installed at the other end of the filter net 161. The net 161 is mounted in the filter chamber 139 while being fixed to the fastening bolt 165 through the mounting ring 163.

The fastening bolt 165 is fastened to the tip of the filter chamber 139 of the cylinder head 133 via a washer 167.

Here, the oil cooling tube 155 is preferably made of an aluminum material so as to increase heat dissipation of oil flowing therein, but is not limited thereto.

In addition, the cooling housing 153 is provided with an O-ring 169 between the front and rear of the outer peripheral surface and the inner peripheral surface of the filter chamber 139 to prevent leakage of the cooling water.

Therefore, the operation of the filter device for an oil control valve having the configuration as described above, the oil supplied from the oil pump 121 to the oil control valve 125 is guided to pass through the filter network 161 is included in the oil At the same time, the oil is introduced into the filter network 161 through a plurality of oil cooling tubes 155 inside the cooling housing 153 through which the coolant is circulated through the coolant chamber 151. The heat dissipation is performed through the endothermic action of the coolant in the coolant chamber 151.

As described above, the cooling water absorbing the heat amount of the oil is discharged to the cooling water gallery and is then cooled to perform the cooling operation of the oil through the purification process supplied to the cooling water chamber 151.

In particular, the oil control valve filter device of the continuous variable valve timing system has a viscosity and pressure of the oil through the oil cooling action of the cooling housing 153 in a high speed operation region in which the temperature of the engine oil is excessively increased at least 110 ° C. or more. To maintain the CVVT smooth operation.

As described above, according to the oil control valve filter device of the continuous variable valve timing system according to the present invention, a cooling housing in which engine coolant is circulated is formed at one side of the oil control valve filter and at the same time as the oil supplied to the CVVT unit, By maintaining the cooling action, in particular, in the high speed operation region in which the engine oil temperature is excessively maintained, the oil viscosity and oil pressure are maintained, thereby smoothly operating the CVVT in the high speed operation region. It has an inducing effect.

Claims (3)

In the continuously variable valve timing system, the oil supply line to receive oil from the oil pump and the oil control valve on one side of the cylinder head to remove foreign substances contained in the oil supplied from the oil pump to the oil control valve. In the filter device for the oil control valve of the continuous variable valve timing system formed in the filter chamber by forming a filter chamber is connected to each of the oil discharge pipe to supply the, The filter chamber forms a cooling water supply line through which the cooling water is supplied from the cooling water pump of the engine on one side, and forms a cooling water discharge line for supplying the cooling water to the cooling water gallery. In the filter chamber, a hollow coolant chamber formed in a cylindrical shape is sealed in the inside of the filter chamber, and the coolant chamber includes a plurality of oil cooling tubes disposed in a transverse direction, and an outer peripheral surface of the coolant supply pipe and the coolant discharge pipe A cooling housing corresponding to each of the furnaces to form a cooling water inlet for introducing the cooling water into the cooling water chamber and a cooling water outlet for discharging the cooling water, the cooling housing being disposed corresponding to the oil supply line; A filter net having one end mounted on one side of the cooling housing; A mounting ring mounted at the other end of the filter network; A fastening bolt for fixing the filter net through the mounting ring to mount the filter net in the filter chamber; Filter device for oil control valve of the continuous variable valve timing system comprising a. The method of claim 1, wherein the oil cooling tube An oil control valve filter device for a continuous variable valve timing system, characterized in that the material is made of aluminum. The method of claim 1, wherein the cooling housing An oil control valve filter device for a continuous variable valve timing system, wherein an O-ring is provided between the front and rear sides of the outer circumferential surface and the inner circumferential surface of the filter chamber.