Method and device for automatically measuring lubricating oil consumption of automobile engine

Abstract

The invention discloses a method and a device for automatically measuring lubricating oil consumption of an automobile engine. The automatic measurement method comprises the following steps: arranging a monitoring oil tank which is communicated with an oil pan of an engine through a pipeline to form a communicating vessel; an oil supplementing tank is arranged and connected with the monitoring oil tank through an oil supplementing pipe; during oil supplementing, the target oil supplementing amount is firstly calculated and determined, and then the oil supplementing pipe is opened according to the target oil supplementing amount to supplement lubricating oil to the monitoring oil tank; and after oil recharging is finished, the actual oil recharging amount is calculated, one oil recharging measurement period is finished, and the lubricating oil consumption in the secondary oil recharging period is calculated based on the actual oil recharging amount. According to the automatic measurement technology of the automobile engine lubricating oil consumption, automation of measurement of the automobile engine lubricating oil consumption is achieved, and accuracy and measurement efficiency are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile engine lubricating oil consumption monitoring, in particular to an automatic measuring method and device for automobile engine lubricating oil consumption. BACKGROUND

[0002] The existing automobile engine lubricating oil consumption measuring method is generally the oil draining and weighing method, that is, before running the engine test, the added lubricating oil amount W a is weighed, after the test is completed, the discharged engine lubricating oil amount W b is weighed, the engine lubricating oil leakage amount W p is weighed during the test, and the total lubricating oil consumption amount W g during the test is calculated as W a -W b -W p .

[0003] The main problems of the prior art are: 1) complicated operation: the test personnel need to manually add and discharge oil and weigh at different stages of the test, and need to manually collect the lubricating oil leakage during the process and weigh the oil; 2) low accuracy and poor repeatability: there are many factors causing measurement errors in the test, including engine lubricating oil temperature, crankshaft position during oil discharge, oil discharge time, and lubricating oil leakage during oil addition and discharge; 3) low efficiency: the length of one test is usually more than 20 hours. SUMMARY

[0004] The present application aims to overcome the deficiencies and shortcomings of the prior art, and provides an automatic measuring method and device for automobile engine lubricating oil consumption, which aims to realize the automation of automobile engine lubricating oil consumption measurement, improve the accuracy and measurement efficiency, and solve the problems of the prior art that require manual weighing, large measurement error and low efficiency.

[0005] One object of the present application is to provide an automatic measuring method for automobile engine lubricating oil consumption, comprising:

[0006] An oil monitoring tank is arranged and connected to the oil pan of the engine through a pipeline to form a communicating vessel; an oil supplement tank is arranged and connected to the oil monitoring tank through an oil supplement pipeline; when supplementing oil, the target oil supplement amount is first calculated and determined, then the oil supplement pipeline is opened to supplement the lubricating oil to the oil monitoring tank according to the target oil supplement amount; after the oil supplement is completed, the actual oil supplement amount is calculated, one oil supplement measurement period is ended, and the lubricating oil consumption amount during the second oil supplement is calculated based on the actual oil supplement amount.

[0007] Preferably, the target oil replenishment amount is determined by the central processing unit through real-time monitoring of the lubricating oil level in the monitoring tank and the engine speed, the lubricating oil temperature in the oil sump, and comprehensive analysis of the opening and closing valve values of the oil replenishment valve on the oil replenishment pipe calibrated based on the engine speed and the lubricating oil temperature.

[0008] Preferably, the central processing unit accurately calculates the actual oil replenishment amount based on the monitored lubricating oil mass in the oil replenishment tank, the oil replenishment flow rate, and the change in the measured parameters of the monitoring tank level.

[0009] Preferably, during engine shutdown, the central processing unit calculates the total lubricating oil consumption during the second shutdown based on the current state data and the lubricating oil mass in the oil replenishment tank, the oil replenishment flow rate, and the measured parameters of the monitoring tank level at the last shutdown.

[0010] Preferably, the current state data includes real-time measurement data at engine shutdown and operation record data before engine shutdown, the real-time measurement data at engine shutdown includes the real-time lubricating oil mass of the oil replenishment tank, the real-time level of the monitoring tank, the final temperature of the lubricating oil in the oil sump at shutdown, the last engine speed, and the state of the oil replenishment valve; the operation record data before engine shutdown includes the number of oil replenishments and the flow rate change data, the lubricating oil mass change data in the oil replenishment tank, the engine speed change data, the lubricating oil temperature change data, and the oil replenishment valve opening and closing change data during the operation time from the last shutdown to the current shutdown.

[0011] Preferably, the monitoring tank is provided with a level sensor for monitoring the lubricating oil level in the monitoring tank, and the level sensor is connected to the central processing unit.

[0012] Preferably, the oil replenishment tank is provided with a mass sensor for monitoring the change in lubricating oil mass in the oil replenishment tank, and the oil replenishment pipe is provided with an oil replenishment valve for controlling the opening or closing of the oil replenishment pipe and a flow meter for calculating the oil replenishment amount; the central processing unit is connected to the oil replenishment valve, the flow meter, and the mass sensor.

[0013] Preferably, the central processing unit is connected to a speed sensor for monitoring the engine speed and a lubricating oil temperature sensor for monitoring the lubricating oil temperature in the engine oil sump.

[0014] Preferably, the oil replenishment valve is an electromagnetic valve.

[0015] Another object of the present application is to provide an automatic measurement device for the lubricating oil consumption of an automobile engine, comprising:

[0016] A monitoring tank is connected to the oil sump of the engine through a pipeline to form a communicating vessel; the monitoring tank is provided with a level sensor for monitoring the lubricating oil level in the monitoring tank,

[0017] The oil supplementing tank is connected with the monitoring oil tank through an oil supplementing pipe; the oil supplementing tank is provided with a mass sensor for monitoring the change of the mass of lubricating oil in the monitoring oil supplementing tank, and the oil supplementing pipe is provided with an oil supplementing valve for controlling the opening or closing of the oil supplementing pipe and a flow meter for calculating the oil supplementing amount.

[0018] The liquid level sensor is connected with the central processing unit; the central processing unit is connected with the oil supplementing valve, the flow meter and the mass sensor; the central processing unit is connected with a rotating speed sensor for monitoring the rotating speed of the engine and a lubricating oil temperature sensor for monitoring the temperature of lubricating oil in the oil pan of the engine.

[0019] The automatic measurement technology of the lubricating oil consumption of the automobile engine realizes the automation of the measurement of the lubricating oil consumption of the automobile engine, improves the accuracy and the measurement efficiency, and solves the problems of the existing technology, such as the need for manual weighing, large lubricating oil loss, large measurement error and low test efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic view of the automatic measurement device of the lubricating oil consumption of the automobile engine.

[0021] MARKS OF THE DRAWINGS:

[0022] 1-monitoring oil tank, 2-liquid level sensor, 3-oil supplementing tank, 4-oil supplementing valve, 5-flow meter, 6-mass sensor, 7-engine, 8-oil pan, 9-engine rotating speed and lubricating oil temperature sensing module, 10-crankcase breather pipe, 11-lifting platform, 12-bracket. DETAILED DESCRIPTION

[0023] The application will be further described below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and do not limit the application.

[0024] Please refer to Figure 1 the exemplary embodiments of the application, the automatic measurement method of the lubricating oil consumption of the automobile engine comprises:

[0025] An oil monitoring tank 1 is connected with the oil pan 8 of the engine 7 through a pipeline to form a communicating vessel; an oil supplementing tank 3 is connected with the oil monitoring tank 1 through an oil supplementing pipe; when supplementing oil, the target oil supplementing amount is calculated and determined first, then the oil supplementing pipe is opened to supplement lubricating oil to the oil monitoring tank according to the target oil supplementing amount; after the oil supplementing is completed, the actual oil supplementing amount is calculated, one oil supplementing measurement period is ended, and the lubricating oil consumption during the second oil supplementing is calculated based on the actual oil supplementing amount.

[0026] In the preferred embodiment, the target oil replenishment amount is determined by the central processing unit through real-time monitoring of the lubricating oil level in the monitoring tank and the engine speed and the lubricating oil temperature in the oil sump, and through comprehensive analysis of the opening and closing valve values of the oil replenishment valve on the oil replenishment pipe calibrated based on the engine speed and the lubricating oil temperature.

[0027] In the preferred embodiment, the central processing unit accurately calculates the actual oil replenishment amount based on the monitored lubricating oil mass in the oil replenishment tank and the oil replenishment flow rate and the change of the measured parameters of the monitoring tank level.

[0028] In the preferred embodiment, when the engine is stopped, the central processing unit calculates the total lubricating oil consumption during the second stop based on the current state data and the lubricating oil mass in the oil replenishment tank, the oil replenishment flow rate, and the measured parameters of the monitoring tank level at the last stop.

[0029] In the preferred embodiment, the current state data includes real-time measurement data at the time of engine stop and operation record data before the engine stop, the real-time measurement data at the time of engine stop includes the real-time lubricating oil mass of the oil replenishment tank, the real-time level of the monitoring tank, the final temperature of the lubricating oil in the oil sump at the time of stop, the last engine speed, and the state of the oil replenishment valve; the operation record data before the engine stop includes the number of oil replenishments and the flow rate change data, the lubricating oil mass change data in the oil replenishment tank, the engine speed change data, the lubricating oil temperature change data, and the oil replenishment valve opening and closing change data during the operation time from the last stop to the current stop.

[0030] In the preferred embodiment, the monitoring tank 1 is provided with a level sensor 2 for monitoring the lubricating oil level in the monitoring tank, and the level sensor is connected to the central processing unit.

[0031] In the preferred embodiment, the oil replenishment tank is provided with a mass sensor 6 for monitoring the change of the lubricating oil mass in the oil replenishment tank, and the oil replenishment pipe is provided with an oil replenishment valve 4 for controlling the opening or closing of the oil replenishment pipe and a flow meter 5 for calculating the oil replenishment amount; the central processing unit is connected to the oil replenishment valve, the flow meter, and the mass sensor. The upper end of the engine has a crankcase breather pipe 10, which is a prior art and is irrelevant to the scheme of the present application.

[0032] In the preferred embodiment, the central processing unit is connected to a speed sensor for monitoring the engine speed and a lubricating oil temperature sensor for monitoring the lubricating oil temperature in the oil sump of the engine. The speed sensor and the lubricating oil temperature sensor are used in the engine speed and lubricating oil temperature sensing module 9 shown in Figure 1 , or separate speed sensors and lubricating oil temperature sensors are used to monitor the speed and the oil temperature.

[0033] In a preferred embodiment, the oil supplement valve is an electromagnetic valve.

[0034] In the above embodiment, the monitoring oil tank and the liquid level sensor constitute a monitoring unit, the monitoring oil tank of the monitoring unit is connected to the bottom of the engine oil pan and always keeps the liquid level of the oil pan fixed, so that the lubricating oil consumption of the engine is equal to the decrease of the monitoring oil tank; the oil supplement tank and the mass sensor thereon and the oil supplement pipe and the oil supplement valve and the flow meter thereon constitute a metering unit, which is connected to the central processing unit, through monitoring and calculation, the oil supplement amount can be accurately calculated, thereby providing a feasible basis and guarantee for obtaining the lubricating oil consumption of the engine during two oil supplement periods and the total lubricating oil consumption during two shutdown periods.

[0035] In some embodiments, the monitoring unit and the calculation unit can be arranged on the lifting platform 11 to facilitate the installation of the measuring device with the engine oil pan, the monitoring unit can be communicated with the lower part of the side wall of the oil pan through a communication pipeline at the lower part of the side wall of the oil tank to realize the structure of the communicating vessel, and an overflow pipe at the upper part can be connected to realize that the oil in the oil pan can overflow and return to the monitoring oil tank, and the oil supplement tank can be arranged at a position higher than the monitoring oil tank through the support 12 connected with the lifting platform 11 to facilitate the flow of oil during oil supplement.

[0036] During normal operation of the engine, the central processing unit determines the oil supplement amount based on the real-time monitored lubricating oil level, speed and temperature parameters and comprehensive analysis with the calibrated oil supplement valve opening and closing threshold based on the speed and temperature, opens the oil supplement valve for oil supplement, closes the oil supplement valve after reaching the target oil supplement amount, and after completing the oil supplement, the central processing unit accurately calculates the oil supplement amount based on the mass sensor and the flow meter, measures the parameter changes of the liquid level sensor, ends a measurement period, and obtains the lubricating oil consumption of the engine during two oil supplement periods. When the engine is shutdown, the central processing unit calculates the total lubricating oil consumption during two shutdown periods based on the current state and the lubricating oil mass in the oil supplement tank, the oil supplement flow, the monitoring oil tank liquid level and other parameters at the last shutdown.

[0037] Among them, the oil supplement frequency can be adjusted by adjusting the opening threshold of the oil supplement valve, and the consumption measurement frequency can be adjusted.

[0038] Referring to Figure 1As shown, the embodiment of the present application further provides an automatic measuring device for lubricating oil consumption of an automobile engine, comprising: a monitoring oil tank, which is connected to an oil pan of the engine through a pipeline to form a communicating vessel; a liquid level sensor is arranged on the monitoring oil tank to monitor the liquid level of lubricating oil in the monitoring oil tank; a refilling tank is connected to the monitoring oil tank through a refilling pipe; a mass sensor is arranged on the refilling tank to monitor the mass change of lubricating oil in the refilling tank; a refilling valve is arranged on the refilling pipe to control the opening or closing of the refilling pipe, and a flow meter is arranged on the refilling pipe to calculate the refilling amount; the liquid level sensor is connected to a central processing unit; the central processing unit is connected to the refilling valve, the flow meter and the mass sensor; the central processing unit is connected to a rotating speed sensor to monitor the rotating speed of the engine and a lubricating oil temperature sensor to monitor the temperature of lubricating oil in the oil pan of the engine.

[0039] The above shows and describes the basic principles and main features of the present application and the advantages of the present application, and it is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or essential characteristics of the present application.

[0040] Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

[0041] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments which can be understood by those skilled in the art.

Claims

1. Method for the automatic measurement of the consumption of lubricating oil of an automotive engine, characterized in that, The application relates to a lubricating oil consumption measuring device for an engine. The target oil supplementing amount is determined by a central processing unit through real-time monitoring of the lubricating oil level in a monitoring oil tank, the engine rotating speed and the lubricating oil temperature in an oil sump, and comprehensive analysis of the opening and closing valve values of an oil supplementing valve on the oil supplementing pipe based on the engine rotating speed and the lubricating oil temperature.

2. The automatic measurement method for automobile engine lubricating oil consumption according to claim 1, characterized in that, The central processing unit accurately calculates the actual oil supplementing amount based on the monitored lubricating oil mass in the oil supplementing tank, the oil supplementing flow and the change of the measuring parameters of the monitoring oil tank level.

3. The automatic measurement method for automobile engine lubricating oil consumption according to claim 2, characterized in that, When the engine stops, the central processing unit calculates the total lubricating oil consumption during the second stop based on the current state data, the lubricating oil mass in the oil supplementing tank, the oil supplementing flow and the measuring parameters of the monitoring oil tank level at the last stop.

4. The method of claim 3, wherein the step of determining the amount of lubricating oil consumed by the engine is performed by the engine control unit. The current state data comprises real-time measuring data when the engine stops and operation record data before the engine stops, wherein the real-time measuring data when the engine stops comprises the real-time lubricating oil mass of the oil supplementing tank, the real-time level of the monitoring oil tank, the final temperature of the lubricating oil in the oil sump when the engine stops, the last rotating speed of the engine, the state of the oil supplementing valve, and the operation record data before the engine stops comprises the oil supplementing times during the operation time from the last stop to the present stop, the flow change data, the lubricating oil mass change data, the engine rotating speed change data, the lubricating oil temperature change data and the oil supplementing valve opening and closing change data during each oil supplementing.

5. The automatic measurement method for automobile engine lubricating oil consumption according to claim 4, characterized in that, The monitoring oil tank is provided with a level sensor for monitoring the lubricating oil level in the monitoring oil tank, and the level sensor is connected to the central processing unit.

6. The method of claim 1, wherein the step of determining the amount of lubricating oil consumed by the engine of the vehicle is performed by a sensor. The oil supplementing tank is provided with a mass sensor for monitoring the lubricating oil mass change in the oil supplementing tank, and the oil supplementing pipe is provided with an oil supplementing valve for controlling the opening or closing of the oil supplementing pipe and a flow meter for calculating the oil supplementing amount; and the central processing unit is connected to the oil supplementing valve, the flow meter and the mass sensor.

7. The method of claim 6, wherein the step of determining the amount of lubricating oil consumed by the engine is performed by a method comprising the steps of: determining the amount of lubricating oil consumed by the engine based on the number of revolutions of the engine and the amount of lubricating oil supplied to the engine. The central processing unit is connected to a rotating speed sensor for monitoring the engine rotating speed and a lubricating oil temperature sensor for monitoring the lubricating oil temperature in the oil sump of the engine.

8. The method of claim 6, wherein the step of determining the amount of lubricating oil consumed by the engine is performed by a sensor. The oil supplementing valve is an electromagnetic valve.

9. The automatic measurement method for automobile engine lubricating oil consumption according to claim 2, characterized in that, The application relates to a lubricating oil consumption measuring device for an engine.

10. An automatic measuring device for the consumption of lubricating oil of an automobile engine, characterized in that, The monitoring oil tank is provided with a level sensor for monitoring the lubricating oil level in the monitoring oil tank, The oil supplementing tank is provided with a mass sensor for monitoring the lubricating oil mass change in the oil supplementing tank, and the oil supplementing pipe is provided with an oil supplementing valve for controlling the opening or closing of the oil supplementing pipe and a flow meter for calculating the oil supplementing amount; and the central processing unit is connected to the oil supplementing valve, the flow meter and the mass sensor. ​ The liquid level sensor is connected with a central processing unit; the central processing unit is connected with the oil supplement valve, a flow meter and a mass sensor; the central processing unit is connected with a rotating speed sensor for monitoring the rotating speed of the engine and a lubricating oil temperature sensor for monitoring the temperature of lubricating oil in the oil pan of the engine.

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