KR20040041971A - apparatus for controlling oil flow rate of vehicle - Google Patents

Abstract

PURPOSE: An oil flow control device of a vehicle is provided to secure optimal lubrication conditions by changing the flow of oil supplied to a head to operation conditions at a lubrication system fixed by mounting a continuously variable valve timing and deciding a hardware and accordingly to improve the reliability, durability and function of an engine by preventing the temperature rise of the oil in high speed caused by the lubrication deterioration to a cylinder head. CONSTITUTION: An oil flow control device including a speed sensor, an oil pan(1), a main gallery lubricating pipe(7), and a head gallery lubricating pipe(8) of a vehicle is composed of a thermocouple(110) for sensing the temperature of the oil in the oil pan; first and second solenoid valves(130,150) installed to the main and head gallery lubricating pipes, respectively, and operated at the mapping angle to a control signal; first and second pressure sensors(140,160) for sensing each pressure of the main and head gallery lubricating pipes; and a control unit(120) outputting the control signal for operating the first solenoid valve to the RPM(Revolution Per Minute) of an engine detected by the speed sensor and the temperature of the oil sensed by the thermocouple and opening the first solenoid valve to the pressure detected by the first pressure sensor. In addition, the control unit outputs the control signal for operating the first and second solenoid valves to the RPM of the engine detected by the speed sensor and the temperature of the oil sensed by the thermocouple and for opening the first and second solenoid valves to the pressure sensed by the first pressure sensor.

Description

Apparatus for controlling oil flow rate of vehicle}

The present invention relates to a vehicle, and more particularly, to an oil flow control apparatus for a vehicle.

Hereinafter, a description will be given of the oil flow control apparatus for a vehicle according to the prior art.

1 is a view showing an example of an oil flow control apparatus for a vehicle according to the prior art, which includes an oil pan 1, a first connecting pipe 2, a second connecting pipe 3, and a relief valve 4. And oil pump (5), third connector (6), main gallery lubrication pipe (7), head gallery lubrication pipe (8), and continuously variable valve timing (CVVT) oil supply It consists of a pipe (9).

The first connecting pipe (2) is connected between the oil pan (1) and the oil pump (5), the second connecting pipe (3) is connected between the oil pan (1) and the oil pump (5) The oil pumped in (5) is bypassed to the oil pan (1), and the second connector (3) is a relief for bypassing the oil pumped from the oil pump (5) to the oil pan (1) A valve 4 is formed, the relief valve 4 being remotely controlled.

The oil pumped from the oil pump 5 is supplied to the main gallery (bearing, cone rod, piston jet, etc.) through the third connecting pipe 6 and the main gallery lubrication pipe 7, and the third connecting pipe. (6) and head gallery lubrication pipe (8) are supplied to the head gallery, and also variable through the third connecting pipe (6) and continuously variable valve timing (CVVT) oil supply pipe (9). Supplied to the Continuously Variable Valve Timing (CVVT).

The operation of the oil flow control apparatus for a vehicle according to the related art configured as described above will be described in detail with reference to the accompanying drawings.

First, as shown in FIG. 1, the lubrication of the engine is performed by the oil pump 5 pumping oil in the oil pan 1 through the first connecting pipe 1 to lubricate the third connecting pipe 6 and the main gallery. The pipe 7 is supplied to the main gallery (bearing, cone rod, piston jet, etc.), and is supplied to the head gallery through the third connecting pipe 6 and the head gallery lubrication pipe 8.

In addition, the oil pump 5 pumps the oil in the oil pan 1 through the first connecting pipe 1 so that the second connecting pipe 5 and the continuously variable valve timing mechanism (CVVT) oil supply pipe. (9) is supplied to the Continuously Variable Valve Timing (CVVT).

On the other hand, when the oil pressure of the oil supplied to the engine is greater than or equal to the reference value, the relief valve 4 is released in accordance with the control signal of the controller (not shown) and the oil pumped from the oil pump 5 to the oil pan (1) Passed.

However, the oil flow control apparatus of the vehicle according to the prior art is equipped with a variable valve timing mechanism (CVVT) for optimization of performance and fuel economy, and cannot be easily changed when the hardware is determined (oil pump, gallery shape, etc.). The lubrication toward the head is worsened, and the oil temperature rises at high speed and the variable valve timing mechanism (CVVT) non-operation area section is existed at low temperature. There is a problem that an abnormality occurs in the reliability, durability, and function of the engine when the excessive rise.

Therefore, the present invention has been made to solve the above problems, and equipped with a variable valve timing mechanism (CVVT) for optimizing performance and fuel economy, and fixed lubrication system according to the hardware decision (oil pump, gallery shape, etc.) In order to improve the reliability, durability, and function of the engine by preventing the oil temperature rise at high speed due to the deterioration of lubrication toward the cylinder head by changing the oil flow rate supplied to the head according to the operating conditions, It is an object of the present invention to provide an oil flow control device for a vehicle so that the effect of performance and fuel economy can be seen in a low speed section by eliminating the non-operating region section of the CVVT at low temperature high temperature.

1 is a view showing an example of the oil flow control apparatus for a vehicle according to the prior art

2 is a view showing an embodiment of an oil flow control apparatus for a vehicle according to the present invention;

3 is a view showing an embodiment of an oil flow control method of a vehicle according to the present invention;

4 is a view showing another embodiment of the oil flow control method of a vehicle according to the present invention;

Explanation of symbols for main parts of the drawings

110: thermocouple 120: control unit

130: first solenoid valve 140: first pressure sensor

150: second solenoid valve 160: second pressure sensor

A feature of the oil flow control apparatus of a vehicle according to the present invention for achieving the above object is a vehicle oil flow control apparatus having a vehicle speed sensor, an oil pan, a main gallery lubrication pipe, and a head gallery lubrication pipe. The first and second solenoid valves installed in the thermocouple sensing the temperature of the oil in the oil pan, the main gallery lubrication pipe and the head gallery lubrication pipe, respectively, operated at an angle mapped according to a control signal, and the main First and second pressure sensors for detecting pressures of the gallery lubrication pipe and the head gallery lubrication pipe, and the first solenoid according to the oil temperature detected by the RPM and the thermocouple of the engine detected by the vehicle speed sensor. Outputs a control signal for operating the valve and opening the first solenoid valve according to the pressure sensed by the first pressure sensor; Outputs a control signal for operating the first and second solenoid valves according to the RPM of the engine detected by the vehicle speed sensor and the oil temperature detected by the thermocouple, and according to the pressure detected by the first pressure sensor. And a control unit for outputting a control signal for opening the first and second solenoid valves.

The controller compares the RPM of the engine detected by the vehicle speed sensor and the first reference RPM to determine if the detected RPM of the engine is greater than the first reference RPM. After comparing the detected oil temperature and the reference oil temperature, if the detected oil temperature is greater than the reference oil temperature, the first pressure and the first pressure of the main gallery lubrication pipe detected by the first pressure sensor are operated after operating the first solenoid valve. The control signal for opening the first solenoid valve when the sensed first pressure is less than the first reference pressure by comparing the first reference pressure is another feature.

The controller compares an RPM of the engine detected by the vehicle speed sensor with a first reference RPM and compares the case where the detected RPM of the engine is smaller than the first reference RPM and the thermocouple. It is another feature to output a control signal for opening the first and second solenoid valve when the detected oil temperature is less than the reference oil temperature by comparing the detected oil temperature and the reference oil temperature.

The controller compares the RPM of the engine detected by the vehicle speed sensor and the second reference RPM to determine if the detected RPM of the engine is greater than the second reference RPM. After comparing the detected oil temperature with the reference oil temperature, if the detected oil temperature is greater than the reference oil temperature, the first and second solenoid valves are operated and then the first gallery of the main gallery lubrication pipe detected by the first pressure sensor. Comparing the pressure with the first reference pressure to output a control signal for opening the first and second solenoid valves when the detected first pressure is less than the first reference pressure, wherein the detected first pressure is the first reference pressure; If greater than the first pressure and the second solenoid when the detected second pressure is less than the second reference pressure by comparing the second pressure and the second reference pressure of the head gallery lubrication pipe detected by the second pressure sensor Outputting a control signal for opening the valve and comparing the second reference RPM and the second reference RPM of the engine detected by the vehicle speed sensor when the detected second pressure is greater than a second reference pressure; Another feature is that the subsequent process is repeated.

The controller compares an RPM of the engine detected by the vehicle speed sensor with a first reference RPM and compares the case where the detected RPM of the engine is smaller than the first reference RPM and the thermocouple. It is another feature to output a control signal for opening the first and second solenoid valve when the detected oil temperature is less than the reference oil temperature by comparing the detected oil temperature and the reference oil temperature.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

Hereinafter, a preferred embodiment of the oil flow control apparatus for a vehicle according to the present invention will be described.

2 is a view showing an embodiment of an oil flow control apparatus for a vehicle according to the present invention, which includes a thermocouple 110, a controller 120, a first solenoid valve 130, and a first pressure sensor 140. ), A second solenoid valve 150, and a second pressure sensor 160. Here, among the components of FIG. 2, the same reference numerals are given to the same components as those of FIG. 1, and description thereof will be omitted.

The thermocouple 110 detects the oil temperature in the oil pan 1.

The control unit 120 operates the first solenoid valve 130 according to the oil temperature detected by the RPM of the engine detected by the vehicle speed sensor (not shown) and the thermocouple 110 and generates a first pressure. Outputs a control signal for opening the first solenoid valve 130 according to the pressure sensed by the sensor 140, or RPM and the thermocouple 110 of the engine detected by the vehicle speed sensor (not shown) Outputs a control signal for operating the first and second solenoid valves 130 and 150 according to the detected oil temperature and the first and second solenoid valves 130 according to the pressure sensed by the first pressure sensor. The control signal for opening 150 is output.

The control unit 120 compares the RPM of the engine detected by the vehicle speed sensor (not shown) with the first reference RPM (RPM) and the detected RPM of the engine (RPM) is the first reference RPM (RPM) If larger than the first oil sensor after operating the first solenoid valve 130 when the detected oil temperature is greater than the reference oil temperature after comparing the detected oil temperature and the reference oil temperature in the thermocouple 110 Comparing the first pressure and the first reference pressure of the main gallery lubrication pipe 7 detected by the 140 to open the first solenoid valve 130 when the detected first pressure is less than the first reference pressure. The control signal is output.

The controller 120 compares an RPM of the engine detected by the vehicle speed sensor (not shown) with a first reference RPM so that the detected RPM of the engine is the first reference RPM. The first and second solenoid valves 130 and 150 are opened when the detected oil temperature is smaller than the reference oil temperature by comparing the oil temperature detected by the thermocouple 110 with the reference oil temperature. .

The control unit 120 compares the RPM of the engine detected by the vehicle speed sensor (not shown) with the second reference RPM (RPM) to determine the RPM of the engine is a second reference RPM (RPM) If greater, the first and second solenoid valves 130 and 150 are operated when the detected oil temperature is greater than the reference oil temperature after comparing the detected oil temperature with the reference oil temperature. After comparing the first pressure and the first reference pressure of the main gallery lubrication pipe (7) detected by the first pressure sensor 140 and the detected first pressure is less than the first reference pressure first and second Outputs a control signal for opening the solenoid valves 130 and 150, and when the detected first pressure is greater than the first reference pressure, the head gallery lubrication pipe 8 detected by the second pressure sensor 160 A second pressure is compared with a second reference pressure, so that the sensed second pressure is second When the pressure is less than the reference pressure, the control signal for opening the first and second solenoid valves 130 and 150 is output. When the detected second pressure is greater than the second reference pressure, the vehicle speed sensor (not shown) The process subsequent to comparing the detected RPM of the engine and the second reference RPM is repeated.

The control unit 120 compares the RPM of the engine detected by the vehicle speed sensor (not shown) with the first reference RPM (RPM) and the detected RPM of the engine (RPM) is the first reference RPM (RPM) When smaller and compared with the oil temperature detected by the thermocouple 110 and the reference oil temperature to open the first and second solenoid valves 130, 150 when the detected oil temperature is less than the reference oil temperature. do.

The first solenoid valve 130 is installed in the main gallery lubrication pipe 7 to operate at a mapped angle according to a control signal output from the control unit 120.

The first pressure sensor 140 detects the pressure of the main gallery lubrication pipe 7.

The second solenoid valve 150 is installed in the head gallery lubrication pipe 8 to operate at a mapped angle according to a control signal output from the controller 130.

The second pressure sensor 160 detects the pressure of the head gallery lubrication pipe 8.

3 is a view showing an embodiment of the oil flow control method of the vehicle according to the present invention, Figure 4 is a view showing another embodiment of the oil flow control method of the vehicle according to the present invention.

The oil flow control apparatus for a vehicle according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First, as shown in FIG. 1, the lubrication of the engine is performed by the oil pump 5 pumping oil in the oil pan 1 through the first connecting pipe 1 to lubricate the third connecting pipe 6 and the main gallery. The pipe 7 is supplied to the main gallery (bearing, cone rod, piston jet, etc.), and is supplied to the head gallery through the third connecting pipe 6 and the head gallery lubrication pipe 8.

In addition, the oil pump 5 pumps the oil in the oil pan 1 through the first connecting pipe 1 so that the second connecting pipe 5 and the continuously variable valve timing mechanism (CVVT) oil supply pipe. (9) is supplied to the Continuously Variable Valve Timing (CVVT).

Then, as shown in FIG. 3, the vehicle speed sensor (not shown) detects and outputs the engine RPM of the vehicle (S1), and the thermocouple 110 measures the oil temperature in the oil pan 1. It is detected (S2) and output, the first pressure sensor 140 detects (S3) the oil pressure of the mail gallery lubrication pipe (7) and outputs.

Oil in the oil pan 1 is pumped by the oil pump 5 through the first connecting pipe (1), the third connecting pipe (6), the main gallery lubrication pipe (7) and the head gallery lubrication pipe (8) and When continuously supplying to the main gallery (bearing, cone rod, piston jet, etc.) through a variable valve timing mechanism (CVVT) oil supply pipe 9, the controller 120 is detected by the vehicle speed sensor (not shown). The RPM of the engine and the first reference RPM are compared (S4).

As a result of the comparison, when the detected RPM of the engine is greater than the first reference RPM, the controller 120 compares the detected oil temperature with the reference oil temperature in the thermocouple 110 (S5). When the detected oil temperature is greater than the reference oil temperature, a control signal for operating the first solenoid valve 130 is outputted, and when the detected RPM of the engine is smaller than the first reference RPM. And when the sensed oil temperature is less than the reference oil temperature, the first solenoid valve 130 is opened.

Accordingly, the first solenoid valve 130 is closed at a mapped angle according to the control signal output from the controller 120 (S6).

Thereafter, the controller 120 compares the first pressure and the first reference pressure of the main gallery lubrication pipe 7 detected by the first pressure sensor 140 (S7) so that the detected first pressure is the first reference. When the pressure is less than the pressure, a control signal for opening the first solenoid valve 130 is output. When the detected first pressure is greater than the first reference pressure, steps S5 and S6 are repeatedly performed.

Then, the first solenoid valve 130 is opened according to the control signal output from the controller 120 (S8).

In addition, as shown in FIG. 1, the lubrication of the engine is carried out by the oil pump 5 pumping oil in the oil pan 1 through the first connecting pipe 1 to lubricate the third connecting pipe 6 and the main gallery. The pipe 7 is supplied to the main gallery (bearing, cone rod, piston jet, etc.), and is supplied to the head gallery through the third connecting pipe 6 and the head gallery lubrication pipe 8.

In addition, the oil pump 5 pumps the oil in the oil pan 1 through the first connecting pipe 1 so that the second connecting pipe 5 and the continuously variable valve timing mechanism (CVVT) oil supply pipe. (9) is supplied to the Continuously Variable Valve Timing (CVVT).

Then, as shown in Figure 4, the vehicle speed sensor (not shown) detects and outputs the engine RPM (RPM) of the vehicle (ST1), the thermocouple 110 is the oil temperature in the oil pan (1) The first and second pressure sensors 140 and 160 detect the oil pressure of each of the mail gallery lubrication pipe 7 and the head gallery lubrication pipe 8 and output the detected ST2. Done.

Oil in the oil pan 1 is pumped by the oil pump 5 through the first connecting pipe (1), the third connecting pipe (6), the main gallery lubrication pipe (7) and the head gallery lubrication pipe (8) and When continuously supplying to the main gallery (bearing, cone rod, piston jet, etc.) through a variable valve timing mechanism (CVVT) oil supply pipe 9, the controller 120 is detected by the vehicle speed sensor (not shown). Comparing the engine RPM (RPM) and the second reference RPM (RPM) (ST5).

As a result of the comparison, when the detected RPM of the engine is greater than the second reference RPM, the controller 120 compares the detected oil temperature with the reference oil temperature in the thermocouple 110 (ST6). When the detected oil temperature is greater than the reference oil temperature, a control signal for operating the first and second solenoid valves 130 and 150 is output, and the RPM of the detected engine is the second reference ALPM. The first and second solenoid valves 130 and 150 are opened when smaller than the RPM and when the detected oil temperature is smaller than the reference oil temperature.

Accordingly, the first and second solenoid valves 130 and 150 are closed at an angle mapped according to the control signal output from the controller 120 (ST7).

Thereafter, the controller 120 compares the first pressure and the first reference pressure of the main gallery lubrication pipe 7 detected by the first pressure sensor 140 (ST8) to determine the detected first pressure as the first reference. If less than the pressure outputs a control signal for opening the first and second solenoid valve 130.

Then, the first and second solenoid valves 130 and 150 are respectively opened according to the control signal output from the controller 120 (ST9).

In addition, the controller 120 compares the second pressure of the head gallery lubrication pipe 8 detected by the second pressure sensor 160 when the detected first pressure is greater than the first reference pressure as a result of the comparison in step ST8. The second reference pressure is compared (ST10).

As a result of the comparison in step ST10, when the detected second pressure is less than the second reference pressure, a control signal for opening the first and second solenoid valves 130 and 150 is output.

Then, the first and second solenoid valves 130 and 150 are respectively opened according to the control signal output from the controller 120 (ST9).

In addition, when the detected second pressure is greater than the second reference pressure as a result of the comparison in step ST10, the process after the step ST6 is repeated.

Meanwhile, when the oil pressure of the oil supplied to the engine is greater than or equal to the reference value, the relief valve 4 is reliefd according to the control signal of the controller (not shown) and the oil pumped from the oil pump 5 is transferred to the oil pan 1. Passed.

As described above, the oil flow control apparatus for a vehicle according to the present invention is equipped with a variable valve timing mechanism (CVVT) for optimizing performance and fuel economy, and a fixed lubrication system according to hardware decision (oil pump, gallery shape, etc.). In order to improve the reliability, durability, and function of the engine by preventing the oil temperature rise at high speed due to the deterioration of lubrication toward the cylinder head by changing the oil flow rate supplied to the head according to the operating conditions, Variable valve timing mechanism (CVVT) at low speed high temperature eliminates the non-operational area, so the effect of performance and fuel economy can be seen in the low speed section.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims and their equivalents.

Claims (5)

In a vehicle oil flow control device having a vehicle speed sensor, an oil pan, a main gallery lubrication pipe, and a head gallery lubrication pipe, A thermocouple sensing the oil temperature in the oil pan; First and second solenoid valves installed on the main gallery lubrication pipe and the head gallery lubrication pipe, respectively, and operated at an angle mapped according to a control signal; First and second pressure sensors configured to sense pressure of each of the main gallery lubrication pipe and the head gallery lubrication pipe; Control to operate the first solenoid valve according to the RPM of the engine sensed by the vehicle speed sensor and the oil temperature detected by the thermocouple and to open the first solenoid valve according to the pressure sensed by the first pressure sensor. Outputs a signal, or outputs a control signal for operating the first and second solenoid valves according to the RPM of the engine detected by the vehicle speed sensor and the oil temperature detected by the thermocouple, And a control unit for outputting a control signal for opening the first and second solenoid valves in accordance with the sensed pressure. The method of claim 1, The control unit The oil detected by the thermocouple when the detected RPM of the engine is greater than the first reference RPM by comparing the RPM of the engine detected by the vehicle speed sensor with the first reference RPM. After comparing the temperature and the reference oil temperature, if the detected oil temperature is greater than the reference oil temperature, the first pressure and the first reference pressure of the main gallery lubrication pipe detected by the first pressure sensor after operating the first solenoid valve Compared to the oil flow control device for the vehicle, characterized in that for outputting a control signal for opening the first solenoid valve when the first pressure is less than the first reference pressure. The method of claim 2, The control unit Compared to the RPM of the engine detected by the vehicle speed sensor and the first reference RPM, the detected RPM of the engine is smaller than the first reference RPM and detected by the thermocouple. And comparing the oil temperature with the reference oil temperature and outputting a control signal for opening the first and second solenoid valves when the detected oil temperature is smaller than the reference oil temperature. The method of claim 2, The control unit The oil detected by the thermocouple when the detected RPM of the engine is greater than the second reference RPM by comparing the RPM of the engine detected by the vehicle speed sensor with the second reference RPM. After comparing the temperature and the reference oil temperature, if the detected oil temperature is greater than the reference oil temperature, the first pressure and the first pressure of the main gallery lubrication pipe detected by the first pressure sensor are operated after operating the first and second solenoid valves. 1 comparing the reference pressure and outputting a control signal for opening the first and second solenoid valves when the detected first pressure is less than the first reference pressure, and the detected first pressure is greater than the first reference pressure. When the second pressure of the head gallery lubrication pipe detected by the second pressure sensor is compared with the second reference pressure, when the detected second pressure is less than the second reference pressure, the first and second solenoid valves are opened. Outputting a control signal for turning on, and comparing the second reference RPM and the second reference RPM of the engine detected by the vehicle speed sensor when the detected second pressure is greater than the second reference pressure. Oil flow control apparatus for a vehicle, characterized in that to perform repeatedly. The method of claim 4, wherein The control unit Compared to the RPM of the engine detected by the vehicle speed sensor and the first reference RPM, the detected RPM of the engine is smaller than the first reference RPM and detected by the thermocouple. And comparing the oil temperature with the reference oil temperature and outputting a control signal for opening the first and second solenoid valves when the detected oil temperature is smaller than the reference oil temperature.