KR20040022555A - Oil pressure sensor united with oil temperature sensor - Google Patents

Abstract

PURPOSE: An oil pressure switch including a temperature sensor is provided to simplify a layout and reduce the number of components by forming the oil pressure switch and the temperature sensor with one body. CONSTITUTION: An oil pressure switch including a temperature sensor includes a switch body(31,32), a connector(34), a diaphragm(35), a plunger(36), a movable contact(37), a spring(39), and a fixing contact(38). The switch body(31,32) includes an oil path(33). The connector(34) is installed at an upper end of the switch body. The diaphragm(35) is arranged in the inside of the switch body. The plunger(36) and the movable contact(37) are installed on an upper face of the diaphragm. The spring(39) is installed at an upper side of the movable contact(37). The fixing contact(38) is installed at a lower side of the movable contact(37). The oil pressure switch including a temperature sensor further includes a temperature sensor unit(40). The temperature sensor unit(40) includes input/output terminals(34b,34c), input/output ports(42a,42b), and a thermistor(41) in order to detect the temperature of oil.

Description

Oil pressure switch integrated with oil temperature sensor {Oil pressure sensor united with oil temperature sensor}

The present invention relates to an oil pressure switch integrated with an oil temperature sensor, and more particularly, a temperature detecting unit capable of detecting a temperature of oil flowing into the diaphragm and operating the diaphragm is additionally installed in the switch body to provide an oil temperature. By integrating with the sensor, it is possible to simultaneously perform the function of the oil temperature sensor in addition to the original function of the oil pressure switch, and thus relates to an oil pressure switch that can achieve layout simplification, component count reduction, and cost reduction.

In general, an oil pressure switch is a component that detects an appropriate amount of engine oil for lubrication, rust prevention, cooling, and airtightness of a driving part in an automobile engine.

In other words, oil pressure switch to detect the presence of engine oil is installed in the oil circulation passage so that the driver can easily know the presence or absence of engine oil through the oil warning light in the cluster. In this case, the oil warning light in the cluster goes off because the contact in the oil pressure switch is turned off.However, if the engine oil pressure above the specified value cannot be applied due to engine stop or lack of oil or abnormal oil pump, the contact in the oil pressure switch is closed and energized. The oil warning light in the cluster is turned on.

Hereinafter, the structure and the operating state of the oil pressure switch with reference to the accompanying drawings.

2 is a cutaway cross-sectional view showing the internal structure of a conventional oil pressure switch.

As shown in the drawing, the switch body is largely divided into upper and lower bodies 11 and 12, and a diaphragm (diaphragm) is formed inside the lower body 12 in which the oil passage 13 is formed so that engine oil can be introduced. 15) are installed horizontally.

In addition, since the plunger 16 and the movable contact 17 are integrally installed on the upper surface of the diaphragm 15, the plunger 16 and the movable contact 17 are also raised together when the diaphragm 15 is raised. have.

In addition, the fixed contact 18 is horizontally arranged to be positioned below the movable contact 17, and the movable contact 17 and the plunger 16 are disposed above the movable contact 17. A spring 19 that supports elastically is installed.

In addition, when using the oil pressure switch 10, the fixed contact 18 is grounded through the lower body 12, the movable contact 17 is connected to the oil warning light in the cluster.

In the oil pressure switch 10 made as described above, when the hydraulic pressure generated by the oil pump during engine operation is transmitted to the lower side of the diaphragm 15 through the oil flow path of the lower body 12, the diaphragm 15 is caused by this pressure. The plunger 16 is raised by the lifting force of the diaphragm 15, and the movable contact 17 is also raised while compressing the spring 19.

At this time, the movable contact 17 is separated from the fixed contact 18, the oil warning light in the cluster is turned off while the two contacts 17 and 18 are opened.

On the contrary, when the hydraulic pressure of the diaphragm 15 does not act on the diaphragm 15 due to engine stop or lack of oil, abnormality of the oil pump, etc., the movable contact 17 and the plunger 16 are prevented by the restoring force of the spring 19. As a result, the movable contact 17 is brought into contact with the fixed contact 18, and the two contacts 17 and 18 are closed and energized to turn on the oil warning light in the cluster.

Recently, in order to improve fuel efficiency and cope with emission regulations, an engine with CVVT (Continuous Variable Valve Timing) technology has been developed.In addition, an oil temperature sensor ( 20) was needed additionally.

Therefore, in an engine to which the CVVT system is applied, an additional oil temperature sensor 20 as shown in FIG. 3 attached to the oil circulation passage is additionally installed, and the oil temperature sensor 20 is a thermistor 22. ) Is built-in.

That is, in the engine to which the CVVT system is applied, the thermistor 22 provided in the lower part of the body 21 in the illustrated figure detects the temperature of the oil flowing through the oil circulation passage and outputs an electrical signal according to the detected value. Is input to the ECU through the output terminal 23 on the top of the body 21, the ECU is to adjust the valve operation timing using the input signal.

However, since the oil temperature sensor is additionally installed in addition to the oil pressure switch in the engine to which the CVVT system is applied as described above, it is necessary to secure an installation place of an appropriate oil temperature sensor in addition to the installation position of the oil pressure switch. It is disadvantageous in terms of aspects, and there are problems such as increased cost and logic complexity (dualization).

Therefore, the present invention has been invented to solve the above problems, the temperature detection unit for detecting the temperature of the oil flowing into the diaphragm operating the diaphragm is additionally installed inside the switch body to be integrated with the oil temperature sensor It is an object of the present invention to provide an oil pressure switch that can simultaneously perform the function of an oil temperature sensor in addition to the original function of the oil pressure switch, thereby simplifying the layout, reducing the number of parts and reducing the cost.

1 is a cross-sectional view showing the internal structure of the oil pressure switch according to the present invention

Figure 2 is a cutaway cross-sectional view showing the internal structure of a conventional oil pressure switch

Figure 3 is a longitudinal sectional view showing the internal structure of a typical oil temperature sensor

<Explanation of symbols for the main parts of the drawings>

30 oil pressure switch 31 upper body

32: lower body 33: oil flow path

34: connector 34: connector

35: diaphragm 36: plunger

37: movable contact 38: fixed contact

39: spring 40: temperature detector

41: thermistor

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

The present invention provides a switch body 31,32 having an oil flow path 33, a connector 34 mounted on the upper end of the switch body 31, 32, and a lower surface inside the switch body 31,32. The diaphragm 35 horizontally arranged to enable the hydraulic action, the plunger 36 and the movable contact 37 integrally installed on the upper surface of the diaphragm 35, and the movable contact 37 to elastically support the upper side. In the oil pressure switch comprising a spring (39) and a fixed contact (38) fixedly installed below the movable contact (37),

The plunger 36 and the diaphragm 35 are integrally arranged to be vertically disposed in the switch bodies 31 and 32 so as to penetrate the plunger 36 and the diaphragm 35 up and down and move up and down with them. It is composed of an input / output terminal (42a, 42b) that is always connected to the input / output terminals (34b, 34c) of the connector 34, the upper end is provided with a thermistor on the lower portion of the diaphragm (35) It is characterized in that the temperature detector 40 is built in the 41 to be able to detect the temperature of the oil introduced into the lower side of the diaphragm (35).

In particular, the temperature detection unit 40 is characterized in that the upper end is installed to be moved up and down in the state inserted into the mounting hole (34d) formed on the lower surface of the connector 34.

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

1 is a cutaway cross-sectional view showing the internal structure of the oil pressure switch according to the present invention.

As shown in the drawing, the present invention relates to an oil pressure switch integrated with an oil temperature sensor, and more particularly, a temperature of oil introduced into the lower side of the diaphragm 35 to simultaneously perform the function of the oil temperature sensor. Detectable temperature detection unit 40 relates to an oil pressure switch 30 further installed inside the switch bodies 31 and 32.

However, the basic configuration and operation state for detecting the presence or absence of engine oil in the oil pressure switch according to the present invention is the same as the existing oil pressure switch.

That is, the switch body is largely divided into upper and lower bodies 31 and 32, the connector 34 is mounted on the upper body 31, and the lower body on which the oil passage 33 is formed so that engine oil can be introduced. The diaphragm 35 is horizontally arrange | positioned inside 32.

In addition, since the plunger 36 and the movable contact 37 are integrally installed on the upper surface of the diaphragm 35, the plunger 36 and the movable contact 37 are also raised together when the diaphragm 35 is raised. have.

In addition, the fixed contact 38 is horizontally arranged to be positioned below the movable contact 37, and the movable contact 37 and the plunger 36 are disposed above the movable contact 37. A spring 39 supporting elastically is installed.

In addition, when using the oil pressure switch 30, the fixed contact 38 is grounded through the lower body 32, the movable contact 37 through the power supply terminal 34a provided in the connector 34 It is connected to the oil warning light in the cluster.

In addition, in the oil pressure switch 30 according to the present invention, a rod-shaped temperature detection unit 40 in which a thermistor 41 is built into the switch bodies 31 and 32 so as to simultaneously perform the function of the oil temperature sensor. ) Is additionally installed.

That is, the diaphragm operated oil pressure switch 30 according to the present invention is integrally formed with an oil temperature sensor of the thermistor detection method.

First, the temperature detection unit 40 is installed to be installed in the upper and lower body 31, 32 vertically long and penetrates the plunger 36 and the diaphragm 35 up and down at the same time the plunger 36 And it is integrally coupled thereto so as to move up and down with the diaphragm (35).

In addition, the temperature detection unit 40 is installed so as to move up and down while the upper end is inserted into the mounting hole (34d) formed in the lower surface of the connector 34, the upper end of the connector 34 regardless of the vertical movement Input / output terminals 42a and 42b which are in constant connection with the / output terminals 34b and 34c are provided.

In addition, a thermistor 41 is built in a lower end portion of the temperature detector 40 located below the diaphragm 35.

The thermistor 41 is built in the lower side of the diaphragm 35 in the temperature detector 40 to detect the temperature of the oil introduced through the oil passage 33 of the lower body 32 to output an electrical signal according to the detected value. do.

In addition, the thermistor 41 is an input / output terminal 34b of the connector 34 mounted on the upper end of the upper body 31 through the input / output terminals 42a and 42b of the upper end through the temperature detector 40. It is always in connection with 34c, and the output terminal 34c of the connector 34 is connected to the ECU in later use.

As a result, the electrical signal output from the thermistor 41 is input to the ECU through the output terminal 34c of the connector 34 mounted on the upper body 31, and the ECU uses the input signal to timing the valve operation. Will be adjusted.

Hereinafter, describing the operating state of the present invention, in the oil pressure switch 30 made as described above, the hydraulic pressure generated by the oil pump during engine operation is lower than the diaphragm 35 through the oil passage 33 of the lower body 32. In this case, the diaphragm 35 is raised by this pressure, and the plunger 36 is raised by the lifting force of the diaphragm 35, and the movable contact 37 is also raised while compressing the spring 39. .

At this time, the movable contact 37 is separated from the fixed contact 38, the oil warning light in the cluster is turned off while the two contacts 37 and 38 are opened.

On the contrary, when the hydraulic pressure above the prescribed value does not act on the diaphragm 35 due to engine stop or lack of oil, abnormality of the oil pump, etc., the movable contact 37 and the plunger 36 are prevented by the restoring force of the spring 39. As a result, the movable contact 37 comes into contact with the stationary contact 38, and as a result, the two contacts 37 and 38 are closed and energized to turn on the oil warning light in the cluster.

In addition, the thermistor 41 embedded in the temperature detector 40 detects the temperature of the oil introduced into the lower side of the diaphragm 35 of the lower body 32, and is applied to the detected value output from the thermistor 41. The electrical signal accordingly is input to the ECU via the output terminal 34c of the connector 34.

In this way, in the oil pressure switch 30 according to the present invention, the temperature detecting part 40 capable of detecting the temperature of the oil flowing into the diaphragm 35 and operating the diaphragm 35 is provided in the switch bodies 31 and 32. In addition to the original function of the oil pressure switch, there is an advantage that the oil temperature sensor can be simultaneously performed.

As described above, the oil pressure switch according to the present invention is provided with a temperature detection unit for detecting the temperature of the oil inside the switch body is integrated with the oil temperature sensor, the oil pressure switch in addition to the original function of the oil temperature sensor Functions can be performed simultaneously, resulting in streamlined layout, fewer components and lower costs.

Claims (2)

Hydraulic action is applied to the switch bodies 31 and 32 in which the oil flow path 33 is formed, the connector 34 mounted on the upper ends of the switch bodies 31 and 32, and the lower surface in the switch bodies 31 and 32. The diaphragm 35 laterally arrange | positioned as much as possible, the plunger 36 and the movable contact 37 which are integrally provided in the upper surface of this diaphragm 35, and the spring 39 which elastically supports this movable contact 37 from the upper side. In the oil pressure switch comprising a fixed contact 38 fixedly installed below the movable contact 37, The plunger 36 and the diaphragm 35 are integrally arranged to be vertically disposed in the switch bodies 31 and 32 so as to penetrate the plunger 36 and the diaphragm 35 up and down and move up and down with them. It is composed of an input / output terminal (42a, 42b) that is always connected to the input / output terminals (34b, 34c) of the connector 34, the upper end is provided with a thermistor on the lower portion of the diaphragm (35) Oil pressure switch integrated with the oil temperature sensor, characterized in that the built-in (41), the temperature detection unit 40 is installed to detect the temperature of the oil introduced into the diaphragm (35) lower side. The oil temperature sensor of claim 1, wherein the temperature detector 40 is installed to move upward and downward in a state where an upper end is inserted into a mounting hole 34d formed at a lower surface of the connector 34. Oil pressure switch.