阅读说明：本技术 一种发动机机油品质检测装置 (Engine oil quality detection device ) 是由 赵迎生 邵金均 卢国东 于 2020-04-20 设计创作，主要内容包括：本发明公开了一种发动机机油品质检测装置,包括机油品质传感器、分压电阻、单片微型计算机,机油品质传感器由小球、连杆、滑臂、变阻器构成,小球固定连接于连杆一端并没入至机油中,滑臂一端与连杆另一端连接并电接地,滑臂另一端保持与变阻器表面电接触并在变阻器表面滑动,分压电阻一端电连接汽车自带电源、另一端电连接变阻器一端,分压电阻、变阻器之间引出有导线电连接单片微型计算机的AD口。本发明通过变阻器的变化反映机油密度的变化,使用户在启动发动机之前对机油品质有直接的判定,准确把握机油的更换时机。(The invention discloses an engine oil quality detection device of an engine, which comprises an engine oil quality sensor, a divider resistor and a single-chip microcomputer, wherein the engine oil quality sensor consists of a small ball, a connecting rod, a slide arm and a rheostat, the small ball is fixedly connected to one end of the connecting rod and is immersed in engine oil, one end of the slide arm is connected with the other end of the connecting rod and is electrically grounded, the other end of the slide arm is electrically contacted with the surface of the rheostat and slides on the surface of the rheostat, one end of the divider resistor is electrically connected with a self-contained power supply of an automobile, the other end of the divider resistor is electrically connected with one end of the. The invention reflects the change of the engine oil density through the change of the rheostat, so that a user can directly judge the quality of the engine oil before starting the engine, and the replacement time of the engine oil can be accurately grasped.)

1. The utility model provides an engine oil quality detection device which characterized in that: the engine oil quality sensor comprises a small ball, a connecting rod, a sliding arm and a rheostat, wherein the density of the small ball is greater than that of good engine oil but less than that of completely deteriorated engine oil, the small ball is fixedly connected to one end of the connecting rod and is immersed in the engine oil, the sliding arm is a good conductor, one end of the sliding arm is fixedly connected with the other end of the connecting rod, the sliding arm is electrically grounded at an arm end connected with the connecting rod, the other end of the sliding arm is electrically contacted with the surface of the rheostat and slides on the surface of the rheostat, so that the small ball floats up and down along the surface of the rheostat under the action of the change of the density of the random oil and is driven by the connecting rod to slide along the surface of the rheostat, one end of the voltage dividing resistor is electrically connected with a self-carrying power supply of an automobile, the other end of the voltage dividing resistor is electrically connected with one, therefore, the voltage of the effective part of the rheostat is changed along with the change of the voltage, a lead is led out between the voltage dividing resistor and the rheostat and is electrically connected with an AD port of the single chip microcomputer, the single chip microcomputer collects voltage signals with random oil density change, a voltage signal threshold value is further arranged in the single chip microcomputer, and the collected voltage signals are compared with the threshold value by the single chip microcomputer.

2. The engine oil quality detection device according to claim 1, characterized in that: the temperature sensor is immersed in the engine oil and is electrically connected to the AD port of the single chip microcomputer.

3. The engine oil quality detection device according to claim 1, characterized in that: the alarm circuit is connected to an I/O port of the single-chip microcomputer, and when the acquired voltage signal reaches a threshold value, the single-chip microcomputer generates a driving voltage signal to drive the alarm circuit to work.

4. The engine oil quality detection device according to claim 1, characterized in that: the I/O port of the single-chip microcomputer is also accessed with an engine starting signal, the internal interrupt program of the single-chip microcomputer takes the engine starting signal as a trigger signal, and the acquisition of the voltage signal is interrupted when the interrupt program receives the trigger signal.

Technical Field

The invention relates to the field of engine detection devices, in particular to an engine oil quality detection device for an engine.

Background

Currently, the use of engines in automobiles is still predominant. When an engine is used, a certain amount of engine oil needs to be stored in an oil pan, but the engine oil is deteriorated due to dust mixing, oxidation and the like after being used for a certain period of time, and certain metal abrasive dust is doped in the engine oil, so that the lubricating performance of the engine oil is reduced. The engine oil newly added into the engine oil pan is bright yellow, and the quality of the engine oil can be easily judged by color. But not for a long time, the color of the oil gradually changes to black. This does not indicate that the oil has lost its effectiveness.

The judgment of whether the engine oil is out of service needs to use a certain means, and ordinary users do not know the means and only can carry out engine oil replacement when the automobile runs for a certain mileage or at time intervals according to the requirements of a manual. At present, the quality of the engine oil of the automobile engine is generally determined by a diffusion method, in which a second drop of the engine oil is dropped on a filter paper to diffuse on the filter paper, and the color of the engine oil is observed. The method needs certain tools, professional knowledge and experience, is difficult to achieve for ordinary automobile users, is basically judged by professional staff according to the experience, and lacks a basis for judging the quality of the engine oil. The quality change of the engine oil is a slow process, and the engine oil is easy to forget to check in time. The engine oil is not replaced in time, so that the consequences of poor lubrication, aggravation of abrasion and the like of the engine are caused.

Disclosure of Invention

The invention aims to provide an engine oil quality detection device to solve the problem that engine oil is difficult to observe and judge in the prior art.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the utility model provides an engine oil quality detection device which characterized in that: the engine oil quality sensor comprises a small ball, a connecting rod, a sliding arm and a rheostat, wherein the density of the small ball is greater than that of good engine oil but less than that of completely deteriorated engine oil, the small ball is fixedly connected to one end of the connecting rod and is immersed in the engine oil, the sliding arm is a good conductor, one end of the sliding arm is fixedly connected with the other end of the connecting rod, the sliding arm is electrically grounded at an arm end connected with the connecting rod, the other end of the sliding arm is electrically contacted with the surface of the rheostat and slides on the surface of the rheostat, so that the small ball floats up and down along the surface of the rheostat under the action of the change of the density of the random oil and is driven by the connecting rod to slide along the surface of the rheostat, one end of the voltage dividing resistor is electrically connected with a self-carrying power supply of an automobile, the other end of the voltage dividing resistor is electrically connected with one, therefore, the voltage of the effective part of the rheostat is changed along with the change of the voltage, a lead is led out between the voltage dividing resistor and the rheostat and is electrically connected with an AD port of the single chip microcomputer, the single chip microcomputer collects voltage signals with random oil density change, a voltage signal threshold value is further arranged in the single chip microcomputer, and the collected voltage signals are compared with the threshold value by the single chip microcomputer.

The engine oil quality detection device is characterized in that: the temperature sensor is immersed in the engine oil and is electrically connected to the AD port of the single chip microcomputer.

The engine oil quality detection device is characterized in that: the alarm circuit is connected to an I/O port of the single-chip microcomputer, and when the acquired voltage signal reaches a threshold value, the single-chip microcomputer generates a driving voltage signal to drive the alarm circuit to work.

The engine oil quality detection device is characterized in that: the I/O port of the single-chip microcomputer is also accessed with an engine starting signal, the internal interrupt program of the single-chip microcomputer takes the engine starting signal as a trigger signal, and the acquisition of the voltage signal is interrupted when the interrupt program receives the trigger signal.

In the invention, when the engine oil is deteriorated, the density is changed, so that the position of the small ball in the engine oil is changed, the position is converted into the resistance value change of the effective part of the rheostat through the connecting rod and the sliding arm, the voltage of the effective part of the rheostat is changed, and the change condition of the engine oil density can be judged through the voltage change by the single-chip microcomputer. When the changed voltage reaches the threshold value, the single-chip microcomputer generates a driving signal to control the alarm circuit to give an alarm.

Compared with the prior art, the variable-resistance engine oil quality detection device reflects the change of the engine oil density through the change of the variable resistor, simultaneously combines the temperature of the engine oil, indirectly detects the quality of the engine oil, and directly feeds the condition of the quality of the engine oil back to a user through the alarm circuit, so that the user can directly judge the quality of the engine oil before starting the engine, accurately grasp the replacement time of the engine oil, eliminate accident potential caused by the change of the quality of the engine oil, and reduce the pollution to the environment.

Drawings

FIG. 1 is a schematic diagram of the present invention.

FIG. 2 is a flow chart of the operation of the single-chip microcomputer according to the present invention.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

As shown in figure 1, an engine oil quality detection device of an engine comprises an engine oil quality sensor, a divider resistor R1 and a single chip microcomputer IC, wherein the engine oil quality sensor is composed of a small ball 1, a connecting rod 2, a slide arm 3 and a rheostat 4, the density of the small ball 1 is larger than that of good engine oil but smaller than that of completely deteriorated engine oil, the small ball 1 is fixedly connected with one end of the connecting rod 2, the small ball 1 is immersed in the engine oil, the slide arm 3 is a good conductor, one end of the slide arm 3 is fixedly connected with the other end of the connecting rod 2, the arm end of the slide arm 3 connected with the connecting rod 2 is electrically grounded, the other end of the slide arm 3 is electrically contacted with the surface of the rheostat 4 and slides on the surface of the rheostat 4, therefore, the small ball 1 floats up and down along the surface of the rheostat 4 under the drive of the connecting rod 2, one end of the divider resistor R1 is electrically connected with, a voltage dividing circuit is formed by a voltage dividing resistor R1, a rheostat 4 and a slide arm 3, the effective part of the rheostat 4 in the voltage dividing circuit changes along with the change of the oil density, so that the voltage of the effective part of the rheostat 4 changes along with the change of the voltage, a lead is led out between the voltage dividing resistor R1 and the rheostat 4 and is electrically connected with an AD port of a single-chip microcomputer IC, a voltage signal with the random oil density change is collected by the single-chip microcomputer IC, a voltage signal threshold value is further arranged in the single-chip microcomputer IC, and the collected voltage signal is compared with the threshold value by the single-chip microcomputer IC.

The present invention further includes a temperature sensor TEM immersed in the engine oil and electrically connected to the AD port of the microcomputer IC.

The invention also comprises an alarm circuit which is formed by L ED, wherein the anode end of L ED is electrically connected with the I/O port of the single-chip microcomputer IC, the cathode end of L ED is grounded, and when the single-chip microcomputer IC reaches the threshold value of the acquired voltage signal, the single-chip microcomputer IC generates a driving voltage signal to drive L ED in the alarm circuit to work.

The I/O port of the single-chip microcomputer IC is also accessed with an engine starting signal ST, the internal interrupt program of the single-chip microcomputer IC takes the engine starting signal ST as a trigger signal, and the interrupt program interrupts the acquisition of the voltage signal when receiving the trigger signal.

The invention relates to an engine oil quality detection device which is used before a user turns on an ignition switch to supply power to a system and does not start an engine, and comprises a small ball, a connecting rod, a sliding arm and a rheostat, wherein the density of the small ball is greater than that of good engine oil but less than that of completely deteriorated engine oil, the small ball is not in the engine oil when the device is in a standing state, the connecting rod is connected with the small ball and the sliding arm to ensure that the sliding arm can be in contact with the surface of the rheostat during moving, the sliding arm has conductivity, when the sliding arm is in different positions of the rheostat, a different resistance value is presented between a lead wire contact led out from one end of the rheostat and a contact point at the end of the sliding arm, the resistance value and a divider resistor R1 share the self-contained power supply of an automobile of the system, when the quality of the engine oil is good, the small ball is not in the engine oil, the sliding arm is at the lower end of the rheostat, the resistance value is large, when the engine oil is poor, the viscosity is increased, the density is increased, the small ball is gradually, the sliding arm moves towards the upper end of the rheostat, the resistance value is reduced, the voltage is connected to an analog-to-digital converter corresponding microcomputer IC (analog-to-.

The engine oil quality detection and alarm device provided by the invention can refer to the temperature of the engine oil to correct the measurement result while detecting the engine oil quality by using a density method. When the temperature of the engine oil is high, the viscosity of the engine oil is reduced, the fluidity is increased, and the density is reduced; when the engine oil temperature is low, the density increases. The relation between the engine oil and the density is stored in advance in the single chip microcomputer IC and used for correcting the detection result of the engine oil in the actual detection.

When the engine is started, a starting signal ST passes through an I/O port of the single-chip microcomputer IC, the single-chip microcomputer IC stops the detection of the quality of the engine oil after receiving the signal, and a L ED warning lamp cannot be lightened.

The embodiments of the present invention are described only for the preferred embodiments of the present invention, and not for the limitation of the concept and scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the design concept of the present invention shall fall into the protection scope of the present invention, and the technical content of the present invention which is claimed is fully set forth in the claims.