KR19990049826A - Alarm device for engine lubricating oil replacement time of vehicle and its control method - Google Patents

Abstract

An engine lubricating oil replacement time alarm device and a control method thereof for measuring the viscosity of the lubricating oil of the engine and automatically alerting the driver of the lubricating oil replacement time to facilitate the management of the engine. The lubricating oil change timing alarm device and control method measures the viscosity of the lubricating oil in the oil pan, and generates lubricating oil changing information when the measured viscosity of the lubricating oil has a large difference from the viscosity at the initial supply. The device is a torque bar coupler that is tensioned between the rotary bar and the torque bar inserted into the rotating rod and the oil pan rotated at a predetermined speed to transfer the rotational force of the rotating bar to the torque bar. A torque measuring device having a rotation speed, two rotational speed detectors for detecting rotational speeds of the rotating rod and the torque bar, and rotational speed detection values output from the two rotational speed detectors, respectively, and calculating the difference; And an alarm generator for generating a lubricating oil change warning signal when the rotated speed difference exceeds a preset reference speed difference.

Description

Alarm device for engine lubricating oil replacement time of vehicle and its control method

The present invention relates to an engine lubricating oil replacement time alarm device of a vehicle, and more particularly, to an apparatus for measuring a viscosity of lubricating oil in an oil reservoir tank (oil pan) to alert the driver of the lubricating oil replacement time.

Typically, in internal combustion engines, lubrication devices are added to reduce friction and wear of the internal parts of the engine and to improve mechanical efficiency, and this lubrication is very important for protecting the mechanical elements inside the engine. Therefore, failure to replace lubricating oil lubricating inside the engine in a timely manner may result in a decrease in engine output, an increase in vibration and noise, and in severe cases, the piston may stick to the outer wall of the cylinder, causing fatal damage to the engine. Is given.

Recently, various types of lubricants for gasoline engines have been diversified, so that not only SF (service station oil "F") and SG grades, but also SH grades with improved lubrication characteristics, have been widely used. It is true. Since the lubricating oil as described above is different depending on the type of lubricating oil, when the lubricating oil is replaced, it is necessary to make a note to recognize the next replacement cycle. However, it is more preferable to replace the lubricating oil when the output of the engine is considerably lowered or when the noise and vibration become severe compared to immediately after lubricating oil replacement, rather than being fixed at a fixed time or travel distance.

As a conventional apparatus for alerting when the engine lubricating oil is to be replaced, publication number 97-27661 (vehicle engine oil replacement time warning device), filed by Hyundai Motor Company and published on June 24, 1997 (hereinafter " "The prior art". The prior art discloses a technical configuration in which the viscosity of the engine lubricating oil is measured to alert the timing of the replacement of the lubricating oil. The published prior art is to immerse a rotary blade connected to the rotary shaft in a storage tank such as a lubricating oil pan to detect the displacement amount of the angular displacement and the angular velocity of the rotary shaft by the viscosity of the lubricating oil, and compare it with the reference angular displacement and the angular velocity displacement Alarmed.

However, the prior art has a technical difficulty in that it is not easy to manufacture, and it is not easy to measure the angular displacement and the angular velocity displacement of the rotating shaft by precipitating the rotor blade in the lubricating oil pan, the lubricating oil settling tank.

Accordingly, it is an object of the present invention to provide an engine lubricating oil replacement timing alarm device for a vehicle which measures the viscosity of the lubricating oil by an easier structure and alerts the lubricating oil replacement time, and a control method thereof.

Another object of the present invention is to provide a torque measuring mechanism capable of easily measuring the viscosity of a vehicle lubricant, and measuring the viscosity of the lubricant to provide an engine lubricant replacement time alarm device for the vehicle and a control method thereof.

The present invention for achieving the above object is a lubricating oil replacement timing alarm device for a vehicle having an oil pan in which lubricating oil is stored, the rotating bar rotated at a predetermined speed and the torque bar inserted in the oil pan and the rotating bar and the torque A torque meter having a tension bar coupled between the bars to transfer the rotational force of the rotating bar to the torque bar, two rotational speed detectors detecting the rotational speed of the rotating bar and the torque bar; And an alarm generator for detecting a rotation speed detection value output from the two rotation speed detectors and calculating the difference, and generating a lubricant oil replacement alarm signal when the calculated rotation speed difference exceeds a preset reference rotation speed difference. do.

1 is a block diagram of the engine lubricating oil replacement time alarm device according to an embodiment of the present invention.

2 is a diagram illustrating a detailed configuration of the torque bar connector shown in FIG.

Figure 3 is a flow chart of the engine lubricating oil replacement time alarm control method according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to obscure the subject matter of the present invention.

1 is a block diagram of the engine lubricating oil replacement time alarm device according to an embodiment of the present invention. Referring to FIG. 1, a torque bar 14 fixed vertically is inserted into an oil pan 10 in which lubricating oil is stored. In addition, a rotary rod 12 is connected to the small motor 26 that rotates at a predetermined speed, and the rotary rod 12 and the torque bar 14 are coupled by a torque bar connector 16. In this case, the torque bar connector 16 includes a tensioning element such as a spring having a good tension therein and transmits the rotational force of the rotating rod 12 to the torque bar 14. In addition, pointers 18 and 22 are formed on each of the rotating rods 12 and the torque bars 14 to indicate rotational positions, which can be suitably used. In the proximity of the pointers 18 and 22, sensors for detecting the rotational speeds of the rotating rod 12 and the torque bar 14, for example, a magnet sensor or a hall sensor, are used to detect the position of the magnet. RPM sensors 20 and 24 are located to detect and output rotational status. The outputs of the RPM sensors 20, 24 are input to the controller 30 operated as an alarm generator. The controller 30 detects and stores the difference in the rotational speeds of the rotating rod 12 and the torque bar 14 output from the two RPM sensors 20 and 24 in response to the reset signal. In addition, the rotation speed difference between the rotation speeds output from the two RPM sensors 20 and 24 is continuously calculated, and the value of the calculated rotation speed difference is a preset error range compared to the value of the rotation speed difference stored in the internal memory. If exceeded, a lubricant change warning signal is generated. The alarm 32 connected to the output terminal of the controller 30 alarms the lubricant change alarm as a signal or indication suitable for the driver to recognize.

2 is a diagram illustrating a detailed configuration of the torque bar connector shown in FIG. The torque bar coupler 16 shown in FIG. 2 has a cylindrical shape, in which a spring 17 for transmitting the rotational torque from the first side to the second side is located. In addition, support plates 13 and 15 for transmitting the rotation torque are formed at one side of the rotating rod 12 and one side of the torque bar 14.

3 is a flowchart of a method of controlling an engine lubricating oil change timing alarm according to the present invention, which shows an operation flowchart of the controller 30 shown in FIG. 1.

Hereinafter, preferred embodiments configured according to the present invention will be described in detail with reference to FIGS. 1 to 3.

Now, when the engine lubricating oil replacement timing alarm device having the configuration as described above is operated, the controller 30 controls the small motor 26 to rotate at a predetermined speed in step 36 of FIG. When the rotating rod 12 is rotated by the rotation of the motor 26, its rotational torque is transmitted to the torque bar 14 by the spring tension in the torque bar connector 16.

That is, since the rotating rod 12 and the torque bar 14 are connected to each of the supporting plates 13 and 15 by the spring 17 as shown in FIG. 2, the driving force of the rotating rod 12 is transmitted to the torque bar 14 by the tension of the spring 17. It can be seen. At this time, if the tension of the spring 17 in the torque bar connector 16 can be finely adjusted, the transmission of the rotational torque can be adjusted. Such tension control will be easily implemented by those skilled in the art.

When the rotating rod 12 and the torque bar 14 are rotated by the above operation, the PRM sensors 20 and 24 detect the rotation of the mark net 18 located at each of the rotating rod 12 and the torque bar 14 to generate an RPM signal. The detected RPM signals are input to the controller 30. The controller 30 inputs the rotation speeds of the rotating rod 12 and the torque bar 14 in FIG. 38 and calculates the difference between the two RPM signals in 40 of FIG. Detect. In operation 40, the controller 30 searches whether the reset signal RES is input. Here, the reset signal is a signal generated by the driver's choice when the lubricant is replaced, and is a signal input to the controller 30 by the operation of a switch (not shown).

If it is determined in step 42 that the reset signal by the driver's selection is input, the controller 30 uses the value C (current information) of the rotation speed difference between the rotating rod 12 and the torque bar 14 immediately detected as reference information. In order to use, it is stored as initialization information I (initial information) in the internal memory in step 44 of FIG. Therefore, when the driver generates a reset signal after exchanging the lubricant, it is possible to detect the lubricant replacement time based on the value of the rotational torque at this time, that is, the value of the rotational speed difference between the rotation rod 12 and the torque bar 14.

If it is determined that the reset signal is not input in step 42, the controller 30 compares the initialization information I and the value C of the rotation speed difference in step 46. In step 48, it is compared whether the detected value C of the rotational speed difference is at least equal to or greater than the error information ΔI to which the allowable error Δ is added to the initialization information I. As a result of the comparison, if it is determined that the value C of the rotation speed difference described above is smaller than the value of the error information ΔI, the operation is repeated from step 36 described above.

In the above state, when the engine lubricant is deteriorated due to long-term strike, and the viscosity of the lubricant is increased, a slip phenomenon occurs in the torque bar connector 16 for measuring the viscosity of the lubricant. For example, when the viscosity of the lubricating oil is increased, the torque bar 14 has a larger coefficient of friction with the lubricating oil with increased viscosity, and thus the torque bar coupler configured as shown in FIG. Slip occurs at the support plate 15 in 16. Such slip becomes an element that gradually increases the difference in rotational speed between the rotating rod 12 and the torque bar 14, and is eventually detected as a difference in RPM signals detected by the two RPM sensors 20 and 24, respectively.

When the value C of the rotational speed difference between the rotating rod 12 and the torque bar 14 exceeds the error information ΔI due to the above cause, the controller 30 outputs the lubricant change information to the alarm 32 in the process 50 of FIG. 3. In response, 32 drives the speaker or lamp to alert the driver. At this time, the driver can change the lubricating oil timely by the alarm from the alarm 32.

As described above, the engine lubricating oil replacement time alarm device according to the present invention detects the viscosity of the lubricating oil, and when the viscosity is higher than the initial lubricating oil, the alarm can be automatically changed so that the management of the vehicle can be made smoother. This can extend the life of the vehicle.

Claims (3)

In the lubricating oil change time alarm device of a vehicle having an oil pan in which lubricating oil is stored, A torque measuring device having a torque bar coupler, which is coupled between a rotary bar rotated at a predetermined speed and a torque bar inserted into the oil pan, between the rotary bar and the torque bar to transfer the rotational force of the rotary bar to the torque bar; Two rotational speed detectors for detecting rotational speeds of the rotating rod and the torque bar; An alarm generator for detecting a rotation speed detection value output from the two rotation speed detectors and calculating the difference, and generating a lubricant change warning signal when the calculated rotation speed difference exceeds a preset reference rotation speed difference. Engine lubricating oil replacement time alarm device of the vehicle. The apparatus of claim 1, wherein a support plate is formed at one side of the rotating rod and the torque bar, and the tension coupling between the two support plates is coupled by a spring. Torque bar inserted into the rotating rod and the oil pan rotated at a predetermined speed, and the tension bar is coupled between the rotating bar and the torque bar, the vehicle having a torque bar connector having a torque bar connector for transmitting the rotational force of the rotating bar to the torque bar To In response to the reset signal being input, storing information on the difference between the initial rotational speeds of the rotating rod and the torque bar as initialization information; At least a process of generating lube oil replacement information in response to the information of the rotational speed of the rotating rod continuously rotating and the difference of the rotational speed of the torque bar being equal to or greater than the setting information in which an error is added to the stored initialization information. How to change the lubricating oil of the vehicle, characterized in that.