JPS61272410A - Warning device of timing replacing lubricating oil for vehicle - Google Patents

Abstract

PURPOSE:To alarm an exchange of lubricating oil always in a correct timing, by providing a lubricating oil amount decrease detecting means detecting a decrease of lubricating oil, supplement detecting means detecting a supplement of lubricating oil and a deteriorating amount correcting means correcting a deteriorating amount of lubricating oil. CONSTITUTION:A lubricating oil deteriorating amount arithmetic means (a) obtains a deteriorating amount of lubricating oil from its use history, and when the deteriorating amount of lubricating oil reaches a predetermined amount, a replacement warning means (b) alarms an exchange of the lubricating oil. An oil amount decrease detecting means (c) detects a decrease of lubricating oil to its minimum required amount, while a supplement detecting means (d) detects a supplement of lubricating oil to its sufficient amount. When the supplement of lubricating oil to its sufficient amount is detected after the decrease of lubricating oil to its minimum required amount is detected, a deteriorating amount correcting means (e) corrects the deteriorating amount of lubricating oil. In this way, the exchange of lubricating oil can be alarmed always in a correct timing.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention provides a lubricating oil change timing system for vehicles that warns about lubricating oil replacement when the amount of deterioration of the lubricating oil determined from the usage history of the lubricating oil reaches a predetermined amount. It concerns a warning device.

(Background of the Invention) This type of device is known from Japanese Patent Application Laid-Open No. 57-151447, Utility Model Application No. 59-21007, etc., and FIG. 2 shows an example of the conventional device.

In the figure, a warning light 10 is lit to warn that the engine oil 14 in the oil pan 12 should be replaced, and the warning light 10 is controlled to be turned on by a replacement warning control circuit 16. A detection signal from a detection circuit 18 is supplied to the detection circuit 18, and the detection circuit 18 includes a sensor that detects the rotation speed of the engine 20 and a sensor that detects the temperature of the engine oil 14.

Then, in the replacement warning control circuit 16, the amount of deterioration due to the usage history of each engine oil 14 is determined by integrating the engine rotation speed for 2 hours, and when any of them reaches a predetermined amount, the warning light 10 is turned on. has been done.

Furthermore, a warning light 22 is lit to warn that the engine oil 14 needs to be refilled.
The IN contact 26 is turned on by the float 28 and is turned on.

Since this conventional device is configured as described above, when the engine oil 14 deteriorates, the warning light 10 is turned on and the engine oil 14 is replaced, and the engine oil 14 reaches the minimum required amount of engine lubricating oil. When the decrease occurs and the MIN contact 26 is turned on, the warning light 22
is lit to prompt replenishment of the engine oil 14.

However, in this conventional device, when the engine oil 14 is refilled, the replacement warning control circuit 1
The amount of deterioration of the engine oil 14 determined in step 6 does not match the actual amount, and as a result, there is a problem in that a warning for replacement cannot be given at an accurate time.

(Object of the invention) The present invention has been made in view of the above-mentioned conventional problems,
The purpose is to provide a lubricating oil change time warning device for a vehicle that can alert the user to change the lubricating oil at an accurate time even if the lubricating oil is refilled.

(Configuration of the Invention) In order to achieve the above object, an apparatus according to the present invention is configured as shown in FIG.

In other words, in the figure, the amount of lubricant deterioration is determined by the deterioration amount calculation means a from the usage history of the lubricant, and when the amount of deterioration of the lubricant reaches a predetermined amount, the replacement warning means prompts the lubricant to be replaced. You have been warned.

Further, the reduction of the lubricating oil to the minimum required amount is detected by the oil amount reduction detection means C, and the replenishment of lubricating oil to a sufficient amount is detected by the replenishment detection means d.

Then, when lubricant replenishment to a sufficient amount is detected after a decrease in lubricant oil to the minimum required amount is detected, the amount of lubricant deterioration that had been calculated by the deterioration amount calculation means is calculated by the deterioration amount correction means. It has been corrected by e.

(Description of Embodiments) Hereinafter, preferred embodiments of the apparatus according to the present invention will be described based on the drawings.

FIG. 3 shows a preferred first embodiment of the apparatus according to the present invention, and the same members as those in the conventional apparatus shown in FIG.

The level sensor 24 of this embodiment is provided with a MAX contact 30, and the MAX contact 30 is turned on when engine oil 14 is injected into the oil pan 12 in an amount sufficient for rA slippage of the engine 20. There is.

The output signal is supplied to the replacement warning control circuit] 6 and the replenishment warning control circuit 32, and the replenishment warning control circuit 3
2 is given the output signal of the MIN contact 26.

The replenishment warning control circuit 32 and the replacement warning control circuit 16
is integrally constructed using a microcombiner, and FIG. 4 shows the processing procedure in the form of a flowchart.

The operation of this embodiment will be explained below according to the flowchart.

When the device of this embodiment is powered on, predetermined initial settings are performed, and then the ffi process shown in FIG. 4 is repeated at predetermined intervals.

First, the rotation speed of the engine 20 detected by the detection circuit 18,
The temperature of the engine oil 14 is read (step 100).
), the engine rotation speed corrected based on the detected temperature of the engine oil 14, and the elapsed time are integrated to determine the amount of deterioration of the engine oil 14 based on the engine rotation speed of 2 hours (step 102). Note that the accumulated engine rotation speed for two hours is corrected based on the detected temperature of the engine oil 14.

Then, using these oil deterioration amounts, engine oil 14
It is determined whether or not the engine oil 14 has deteriorated (step 104), and when it is determined that the engine oil 14 has deteriorated, a warning light]0 is turned on (step 106) and the engine oil 14 is replaced. Note that when replacing the engine oil 4, the amount of deterioration of the engine oil 14 that has been determined up to that point is initialized.

In addition, in the process shown in FIG. 4, it is determined by monitoring the output of the MIN contact 26 whether or not the amount of engine oil 14 has decreased to the minimum amount necessary for lubricating the engine 20 (step 108). When the oil level decreases to the minimum level required for lubrication of the engine oil 14 and the MIN contact 26 is turned on, the warning light 22 is turned on to warn that the engine oil 14 needs to be refilled (step 110).

When it is confirmed that the engine oil 14 replenishment warning has been issued (step 112), the oil pan 1
It is monitored whether or not new oil has been refilled until the engine oil 14 in the oil pan 2 reaches a sufficient level to lubricate the engine 20 (step 114). At this time, the MAX contact 30 is turned on and the oil pan 12 When it is confirmed that new oil has been refilled until the engine oil 14 in the engine reaches a sufficient amount, the warning light 22 is turned off (step 116), thereby instructing to stop the injection of new oil.

As a result, every time the engine oil 14 in the oil pan 12 decreases to the minimum amount necessary for lubricating the engine 20,
An appropriate amount (for example, 1 liter to 1 liter) of new oil is replenished, and the amount of replenishment is always constant.

When a certain amount of engine oil 14 is replenished in this way, the amount of deterioration of engine oil 14 determined up to that point is corrected, so that the amount of deterioration matches the actual amount.

Therefore, according to this embodiment, since the timing of outputting a replacement warning is delayed by replenishing the engine oil 14, it is possible to always issue a warning to replace the engine oil 14 at an accurate time.

Further, in this embodiment, a device for measuring the amount of new oil replenishment is not used, and the level sensor 24 for warning of replenishment is used for correcting the amount of deterioration, so that there is no increase in cost.

It should be noted that when the warning light 22 is turned off, an instruction is given to stop the injection of new oil, so there is no need to check the oil level gauge, which facilitates replenishment of new oil and oil replacement.

Next, a second preferred embodiment of the device according to the present invention will be described.

An embodiment is shown in FIG. 5, in which the operating position of the ignition switch 34 is monitored by a replacement warning control circuit 16.

In this second embodiment, as shown in FIG. 6, when the ignition switch 34 is turned on and the vehicle is being driven (affirmative determination at step 120), the lighting control of the warning light 10 is performed. is carried out (step 1
00,102,104.106>.

Further, when the ignition switch 34 is turned off and the engine 20 is stopped (step 122
(affirmative determination), warning light 220 lighting control and deterioration amount correction are performed (steps 108.1'10, 11).
2,114. '116°118).

As described above, in this embodiment, only when the engine oil 14 in the oil pan 12 changes from the minimum amount necessary for lubrication of the engine 20 to the sufficient amount while the vehicle is stopped, the previously required engine oil 14 is changed. The amount of deterioration is corrected.

Therefore, even if the MAX contact 30 is turned on after the MIN contact 26 is turned on due to vibration or inclination of the vehicle body, the deterioration amount correction will not be performed erroneously.

Therefore, according to this embodiment, even if the vehicle is traveling on a rough road or starting on a steep slope, it is possible to always warn the driver to change the engine oil 14 at an accurate time.

(Effects of the Invention) As explained above, according to the present invention, 1. When replenishing lubricating oil, the previously determined amount of lubricating oil deterioration is corrected, so a warning to replace lubricating oil is always given at the correct time. becomes possible.

[Brief explanation of drawings]

FIG. 1 is a diagram corresponding to claims, FIG. 2 is an explanatory diagram of the configuration of a conventional device, FIG. 3 is an explanatory diagram of the configuration of a first preferred embodiment of the device according to the present invention, and FIG. 4 is a diagram of the embodiment of FIG. FIG. 5 is a flowchart for explaining the operation of the second preferred embodiment of the apparatus according to the present invention, and FIG. 6 is a flowchart for explaining the operation of the embodiment shown in FIG. a...Deterioration amount calculation means b...Replacement warning means C...Oil amount decrease detection means d...Replenishment detection means e...Deterioration amount correction means 10...Warning light 14...Engine Oil 16... Replacement warning control circuit 18... Detection circuit 22... Warning light 24... Level sensor 26... MIN contact 28... Float 30... MAX contact 32... Refill warning Control circuit 34...Ignition switch Figure 1 Figure 2 Figure 5

Claims (1)

[Claims] (1) A deterioration amount calculation means for calculating the amount of lubricant deterioration from the usage history of the lubricant, a replacement warning means for warning to replace the lubricant when the amount of lubricant deterioration reaches a predetermined amount, and a means for calculating the amount of lubricant deterioration to the minimum required amount. A lubricating oil reduction detection means for detecting a lubricant reduction, a replenishment detection means for detecting lubricant replenishment to a sufficient amount, and a lubricant replenishment to a sufficient amount after a lubricant reduction to the minimum required amount is detected. A lubricating oil change time warning device for a vehicle, comprising: a deterioration amount correcting means for correcting the deterioration amount of the lubricating oil when the deterioration occurs.