CN103954742A - Device and method for measuring mixing of engine oil into diesel oil in diesel engine - Google Patents
Device and method for measuring mixing of engine oil into diesel oil in diesel engine Download PDFInfo
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Abstract
The invention discloses a device and a method for measuring mixing of engine oil into diesel oil in a diesel engine. The measuring method comprises the following steps: 1, testing the mixing ratio of engine oil mixed into diesel oil by measuring the kinetic viscosity and temperature of engine oil; 2, establishing a relation expression between the mixing ratio of engine oil mixed into diesel oil and the kinetic viscosity and temperature of engine oil based on a testing result about the mixing ratio of engine oil mixed into diesel oil; 3, detecting the kinetic viscosity and temperature of engine oil on a vehicle-mounted diesel engine; 4, calculating the ratio of engine oil mixed into diesel oil based on the relation expression as well as the detected kinetic viscosity and temperature of engine oil, and comparing the calculated ratio with a preset proportion threshold to judge whether the ratio of engine oil mixed into diesel oil surpasses the upper limit of the proportion threshold or not. According to the method for measuring mixing of engine oil into diesel oil in the diesel engine, the ratio of engine oil mixed into diesel oil of the diesel engine can be measured accurately, and the requirement of vehicle-mounted monitoring of vehicles can be met.
Description
Technical field
The present invention relates to diesel engine field, particularly, particularly in a kind of diesel engine, diesel oil is sneaked into machine oil measurement mechanism and measuring method.
Background technology
In working process of diesel engine, if there is diesel oil to be blended into machine oil, can cause machine oil viscosity to decline.If continue, use and can aggravate engine scuffing, shorten its serviceable life, affect the normal work of diesel engine.At present, diesel oil is sneaked into the main methods such as observing machine oil viscosity, level height variation that adopts of machine oil judgement, and the method can only qualitative analysis, cannot realize accurate judgement; And traditional diesel oil is sneaked into the oil analysis instrument that off-line type is mainly used in the measurement of machine oil ratio, the method expense is high, and length consuming time cannot realize vehicle-mounted monitoring.
Summary of the invention
The present invention is intended to solve at least to a certain extent one of above-mentioned technical matters of the prior art.For this reason, one object of the present invention be to propose a kind of can Measurement accuracy diesel engine in diesel oil sneak into diesel oil in the diesel engine of machine oil ratio and sneak into machine oil measuring method.
Another object of the present invention is to propose diesel oil in a kind of diesel engine and sneak into machine oil measurement mechanism.
According to diesel oil in the diesel engine of the embodiment of the present invention, sneak into machine oil measuring method, comprising: step 1: carry out diesel oil and sneak into machine oil proportioning test, wherein measure machine oil kinetic viscosity and oil temperature; Step 2: sneak into machine oil proportioning test result based on diesel oil, set up diesel oil and sneak into the ratio of machine oil and the relational expression between machine oil kinetic viscosity and oil temperature; Step 3: the machine oil kinetic viscosity and the oil temperature that detect vehicle-mounted diesel engine; Step 4: the machine oil kinetic viscosity based on described relational expression and detection and oil temperature calculate the ratio that diesel oil is sneaked into machine oil, and the ratio of calculating and predetermined proportion threshold value are compared, to judge that diesel oil sneaks into the upper limit whether ratio of machine oil surpasses described proportion threshold value.
In diesel engine, diesel oil is sneaked into machine oil measuring method according to an embodiment of the invention, take into full account after diesel oil is sneaked into machine oil the impact of machine oil kinetic viscosity and other factors are sneaked into the impact of machine oil on kinetic viscosity, in can Measurement accuracy diesel engine, diesel oil be sneaked into machine oil ratio, has and is used in the needs that meet the vehicle-mounted monitoring of vehicle.And in diesel engine, diesel oil is sneaked into machine oil measuring method according to an embodiment of the invention, can realize the vehicle-mounted monitoring of machine oil quality abnormal, accurately determine oil exchange opportunity, for the judgement of lubricating system of diesel oil engine technology status provides accurate means, save Maintenance Resource, improved vehicle avail ability rate.
In addition, in diesel engine according to the above embodiment of the present invention, diesel oil is sneaked into machine oil measuring method and can also be had following additional technical characterictic:
According to one embodiment of present invention, in step 2: diesel oil sneak into the ratio of machine oil and the machine oil kinetic viscosity in the relational expression between machine oil kinetic viscosity and oil temperature be kinetic viscosity with respect to the amplitude of variation U of machine oil initial viscosity,
In formula: μ
0for machine oil initial viscosity, μ is the machine oil k value measuring under same temperature.
The ratio of according to one embodiment of present invention, sneaking into machine oil when diesel oil surpasses described proportion threshold value above sends warning in limited time.
In diesel engine, diesel oil is sneaked into machine oil measurement mechanism according to an embodiment of the invention, comprising: machine oil quality measurement sensor, and described machine oil quality measurement sensor is for monitoring the machine oil viscosity of diesel engine; Sensor device stationary installation, described sensor device stationary installation is connected with described machine oil quality measurement sensor, and described machine oil quality measurement sensor is fixed in sump; Embedded main board, for data processing and calculating; CAN conversion R232 serial ports, described CAN conversion R232 serial ports is connected with described machine oil quality measurement sensor, for converting the signal of machine oil quality measurement sensor to described embedded main board acceptable signal; Storage card, described storage card is connected with described embedded main board, for data, stores; And liquid crystal display, described liquid crystal display is connected with described embedded main board, for data, shows.
In diesel engine, diesel oil is sneaked into machine oil measurement mechanism according to an embodiment of the invention, take into full account after diesel oil is sneaked into machine oil the impact of machine oil kinetic viscosity and other factors are sneaked into the impact of machine oil on kinetic viscosity, in can Measurement accuracy diesel engine, diesel oil be sneaked into machine oil ratio, has and is used in the needs that meet the vehicle-mounted monitoring of vehicle.And in diesel engine, diesel oil is sneaked into machine oil measuring method according to an embodiment of the invention, can realize the vehicle-mounted monitoring of machine oil quality abnormal, accurately determine oil exchange opportunity, for the judgement of lubricating system of diesel oil engine technology status provides accurate means, save Maintenance Resource, improved vehicle avail ability rate.
In addition, in diesel engine according to the above embodiment of the present invention, diesel oil is sneaked into machine oil measurement mechanism and can also be had following additional technical characterictic:
According to one embodiment of present invention, described sensor fastening device comprises: upper cover, and described upper cover and sump are tightly connected; Connecting link, the upper end of described connecting link is connected with described upper cover, in described connecting link, is provided with data line; Top cylinder and doffing, described top cylinder and described doffing fasten, and so that described machine oil quality measurement sensor is fixed and to be sealed in described top cylinder and described doffing, the upper end of described top cylinder is connected with the lower end of described connecting link; And lower cover, described lower cover is connected with the lower end of described doffing, for the protection of described machine oil quality measurement sensor.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Fig. 1 is that in diesel engine according to an embodiment of the invention, diesel oil is sneaked into machine oil measuring method schematic diagram;
Fig. 2 is that diesel oil that in diesel engine according to an embodiment of the invention, diesel oil is sneaked into machine oil measuring method is sneaked into machine oil kinetic viscosity in proportioning test and changed schematic diagram;
Fig. 3 is that chilled water that in diesel engine according to an embodiment of the invention, diesel oil is sneaked into machine oil measuring method is sneaked into machine oil kinetic viscosity in proportioning test and changed schematic diagram;
Fig. 4 is that soot that in diesel engine according to an embodiment of the invention, diesel oil is sneaked into machine oil measuring method is sneaked into machine oil kinetic viscosity in proportioning test and changed schematic diagram;
Fig. 5 is the machine oil viscosity-temperature characteristic matched curve schematic diagram that in diesel engine according to an embodiment of the invention, diesel oil is sneaked into machine oil measuring method;
Fig. 6 is that the machine oil kinetic viscosity that in diesel engine according to an embodiment of the invention, diesel oil is sneaked into the different diesel oil volume fractions of machine oil measuring method varies with temperature curve synoptic diagram;
Fig. 7 is that the machine oil U value of the different diesel oil volume fractions that in diesel engine according to an embodiment of the invention, diesel oil is sneaked into machine oil measuring method varies with temperature curve synoptic diagram;
Fig. 8 is the structural representation that in diesel engine according to an embodiment of the invention, diesel oil is sneaked into machine oil measurement mechanism;
Fig. 9 is the machine oil quality measurement sensor construction schematic diagram that in diesel engine according to an embodiment of the invention, diesel oil is sneaked into machine oil measurement mechanism;
Figure 10 is the machine oil quality measurement three-dimensional sensor decomposing schematic representation that in diesel engine according to an embodiment of the invention, diesel oil is sneaked into machine oil measurement mechanism.
Reference numeral:
10-machine oil quality measurement sensor; 20-sensor device stationary installation; 21-upper cover; 22-connecting link; 23-top cylinder; 24-doffing; 25-lower cover; 30-CAN conversion R232 serial ports; 40-embedded main board; 50-storage card; 60-liquid crystal display.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, be intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of indications such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " be only for describing object, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the invention, the implication of " a plurality of " is two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the terms such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or be integral; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, can understand as the case may be above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, First Characteristic Second Characteristic it " on " or D score can comprise that the first and second features directly contact, also can comprise that the first and second features are not directly contacts but contact by the other feature between them.And, First Characteristic Second Characteristic " on ", " top " and " above " comprise First Characteristic directly over Second Characteristic and oblique upper, or only represent that First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " comprise First Characteristic under Second Characteristic and tiltedly, or only represent that First Characteristic level height is less than Second Characteristic.
As shown in Fig. 1-7, according to diesel oil in the diesel engine of the embodiment of the present invention, sneak into machine oil measuring method, comprising: step 1: carry out diesel oil and sneak into machine oil proportioning test, wherein measure machine oil kinetic viscosity and oil temperature; Step 2: sneak into machine oil proportioning test result based on diesel oil, set up diesel oil and sneak into the ratio of machine oil and the relational expression between machine oil kinetic viscosity and oil temperature; Step 3: the machine oil kinetic viscosity and the oil temperature that detect vehicle-mounted diesel engine; Step 4: the machine oil kinetic viscosity based on described relational expression and detection and oil temperature calculate the ratio that diesel oil is sneaked into machine oil, and the ratio of calculating and predetermined proportion threshold value are compared, to judge that diesel oil sneaks into the upper limit whether ratio of machine oil surpasses described proportion threshold value.
In diesel engine, diesel oil is sneaked into machine oil measuring method according to an embodiment of the invention, take into full account after diesel oil is sneaked into machine oil the impact of machine oil kinetic viscosity and other factors are sneaked into the impact of machine oil on kinetic viscosity, in can Measurement accuracy diesel engine, diesel oil be sneaked into machine oil ratio, has and is used in the needs that meet the vehicle-mounted monitoring of vehicle.And in diesel engine, diesel oil is sneaked into machine oil measuring method according to an embodiment of the invention, can realize the vehicle-mounted monitoring of machine oil quality abnormal, accurately determine oil exchange opportunity, for the judgement of lubricating system of diesel oil engine technology status provides accurate means, save Maintenance Resource, improved vehicle avail ability rate.
According to one embodiment of present invention, in step 2: diesel oil sneak into the ratio of machine oil and the machine oil kinetic viscosity in the relational expression between machine oil kinetic viscosity and oil temperature be kinetic viscosity with respect to the amplitude of variation U of machine oil initial viscosity,
In formula: μ
0for machine oil initial viscosity, μ is the machine oil k value measuring under same temperature.
The ratio of according to one embodiment of present invention, sneaking into machine oil when diesel oil surpasses described proportion threshold value above sends warning in limited time.
The embodiment of the present invention provides diesel oil in a kind of diesel engine to sneak into machine oil measuring method, as shown in Figure 1, specifically comprises the following steps:
Step 1: carry out diesel oil and sneak into machine oil proportioning test; In proportioning test, measure machine oil kinetic viscosity, oil temperature.
According to machine oil, use standard, when machine oil standard movement viscosity (100 ℃ time kinematic viscosity) variable quantity be greater than new machine oil standard movement viscosity 25% time change engine oil more, calculating based on experience value and now sneaking into diesel oil is 10% left and right.Therefore design 4 groups of mixed oil liquid samples, fluid volume is 1600mL.According to equal difference principle, in 1～No. 4 fluid sample, diesel oil volume fraction is respectively 0%, 5%, 8%, 11%.After mixed oil liquid being heated to 110 ℃ during test, naturally cool to 50 ℃, in cooling procedure, utilize its fluid parameter of sensor measurement.Test is the new machine oil of CD10W/40 with machine oil, and diesel oil is-10# diesel oil (kinetic viscosity is 2.94mPas in the time of 20 ℃, and specific inductive capacity is 2.1, and density is 0.84gcm-3).
Table 1 quantitative test scheme
Concrete test findings as shown in Figure 2.In figure, along with diesel oil is sneaked into the rising of ratio, machine oil kinetic viscosity presents continuous downward trend.
Step 2: sneak into machine oil proportioning test based on diesel oil, set up diesel oil and sneak into machine oil ratio and machine oil kinetic viscosity, oil temperature relational expression; Concrete steps comprise:
Step 1: sneak into proportioning test data according to diesel oil, it is viscosity-temperature characteristic curve that utilization index Function Fitting goes out containing the machine oil kinetic viscosity μ of different diesel oil volume fractions and the funtcional relationship of temperature t, as shown in Figure 5.Matched curve related coefficient is all in close proximity to 1.Each viscosity-temperature characteristic curvilinear equation is as shown in the formula shown in (1)～(4), and related coefficient is respectively 0.9989,0.9994,0.9997,0.9994.Diesel oil volume fraction is followed successively by 0%, 5%, 8%, 11%.
μ=352.4exp(-0.06963t)+52.77exp(-0.01429t) (1)
μ=312.1exp(-0.06734t)+39.09exp(-0.01321t) (2)
μ=120.6exp(-0.03814t)+11.46exp(-0.00485t) (3)
μ=152.6exp(-0.05581t)+29.08exp(-0.01254t) (4)
Step 2: utilize interpolation calculation, obtain under same temperature, the machine oil k value of diesel oil volume fraction from 0%～11%, diesel oil volume fraction rising one percentage point calculates a k value, obtains viscosity-temperature curve as shown in Figure 6.From top to bottom, diesel oil volume fraction is respectively 0%, 1%, 2% ..., 11%.
Step 3: because the new machine oil viscosity-temperature characteristic of different model different batches there are differences, therefore, the sample curve in Fig. 6 can only objectively respond the kinetic viscosity situation of change of machine oil for this test.For the situation that can judge that the kinetic viscosity of different machine oil is affected by diesel oil, eliminate the impact that initial viscosity difference is brought, choose kinetic viscosity with respect to the amplitude of variation of initial viscosity as criterion, be designated as U
In formula: μ 0 is new machine oil k value, μ is tested machine oil k value under same temperature.
According to the method for above formula defined, calculate, obtain varying with temperature curve, (diesel oil volume fraction is followed successively by 11% to 1% from top to bottom) as shown in Figure 7 containing the machine oil U value of different diesel oil volume fractions.Definition temperature, U value are input variable, and diesel oil volume fraction is output variable.
Step 4, utilization of the present invention but be not limited to radial basis function (Radial Basis Function, RBF) carry out diesel oil and sneak into the calculating of machine oil ratio, according to RBF neural network structure, select temperature under different diesel oil volume fractions, viscosity amplitude of variation as input variable, diesel oil volume fraction is as output variable.Transport function in neural network model is used Gaussian function, and output layer is used linear function.Model is set to
[net，tr]＝newrd(P，T，5×10
-7，1，1000，10) (6)
In formula: P is for building the needed input vector of network; T is sample output vector; The radial basis function network of net for generating; The training record of tr for generating.
Step 3, the embodiment of the present invention provide diesel oil in a kind of diesel engine to sneak into machine oil vehicle-bone monitoring device, and as shown in Figure 8, the embodiment of the present invention provides vehicle-bone monitoring device to comprise: machine oil quality measurement sensor 10, for vehicle-mounted monitoring machine oil viscosity; Sensor device stationary installation 20, for fixing of sump inner engine oil quality measurement sensor; CAN conversion R232 serial ports 30, for converting machine oil quality measurement sensor signal to mainboard acceptable signal; Embedded main board 40, for data processing and calculating; Storage card 50, for data storage and liquid crystal display 60, shows by data.Concrete described sensor fastening device 20 comprises: upper cover 21, for being tightly connected with sump; Connecting link 22, is connected with top cylinder 23 for upper cover 21, and has data line to pass through in bar; Top cylinder 23 and doffing 24, for the fixing and sealing of sensor; Lower cover 25, protects for sensor probe.
As shown in Fig. 8-10, in diesel engine, diesel oil is sneaked into machine oil measurement mechanism according to an embodiment of the invention, comprising: machine oil quality measurement sensor 10, sensor device stationary installation 20, embedded main board 40, CAN conversion R232 serial ports 30, storage card 50 and liquid crystal display 60.
Particularly, machine oil quality measurement sensor 10 is for monitoring the machine oil viscosity of diesel engine; Sensor device stationary installation 20 is connected with machine oil quality measurement sensor 10, and machine oil quality measurement sensor 10 is fixed in sump (not shown).Embedded main board 40 is for data processing and calculating.CAN conversion R232 serial ports 30 is connected with machine oil quality measurement sensor 10, for converting the signal of machine oil quality measurement sensor 10 to embedded main board 40 acceptable signals.Storage card 50 is connected with embedded main board 40, for data, stores.Liquid crystal display 60 is connected with embedded main board 40, for data, shows.
In diesel engine, diesel oil is sneaked into machine oil measurement mechanism according to an embodiment of the invention, take into full account after diesel oil is sneaked into machine oil the impact of machine oil kinetic viscosity and other factors are sneaked into the impact of machine oil on kinetic viscosity, in can Measurement accuracy diesel engine, diesel oil be sneaked into machine oil ratio, has and is used in the needs that meet the vehicle-mounted monitoring of vehicle.And in diesel engine, diesel oil is sneaked into machine oil measuring method according to an embodiment of the invention, can realize the vehicle-mounted monitoring of machine oil quality abnormal, accurately determine oil exchange opportunity, for the judgement of lubricating system of diesel oil engine technology status provides accurate means, save Maintenance Resource, improved vehicle avail ability rate.
According to one embodiment of present invention, sensor fastening device 20 comprises: upper cover 21, connecting link 22, top cylinder 23, doffing 24 and lower cover 25.
Particularly, upper cover 21 is tightly connected with sump.The upper end of connecting link 22 is connected with upper cover 21, in connecting link 22, is provided with data line.Top cylinder 23 and doffing 24 fasten, and so that machine oil quality measurement sensor 10 is fixed and to be sealed in top cylinder 23 and doffing 24, the upper end of top cylinder 23 is connected with the lower end of connecting link 22.Lower cover 25 is connected with the lower end of doffing 24, for the protection of machine oil quality measurement sensor 10.
In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, to the schematic statement of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.In addition, those skilled in the art can engage the different embodiment that describe in this instructions or example and combine.
Although illustrated and described embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, modification, replacement and modification.
Claims (5)
1. in diesel engine, diesel oil is sneaked into a machine oil measuring method, it is characterized in that, comprising:
Step 1: carry out diesel oil and sneak into machine oil proportioning test, wherein measure machine oil kinetic viscosity and oil temperature;
Step 2: sneak into machine oil proportioning test result based on diesel oil, set up diesel oil and sneak into the ratio of machine oil and the relational expression between machine oil kinetic viscosity and oil temperature;
Step 3: the machine oil kinetic viscosity and the oil temperature that detect vehicle-mounted diesel engine;
Step 4: the machine oil kinetic viscosity based on described relational expression and detection and oil temperature calculate the ratio that diesel oil is sneaked into machine oil, and the ratio of calculating and predetermined proportion threshold value are compared, to judge that diesel oil sneaks into the upper limit whether ratio of machine oil surpasses described proportion threshold value.
2. the method for claim 1, it is characterized in that, in step 2: ratio and the machine oil kinetic viscosity in the relational expression between machine oil kinetic viscosity and oil temperature that diesel oil is sneaked into machine oil are that kinetic viscosity is with respect to the amplitude of variation U of machine oil initial viscosity
In formula: μ
0for machine oil initial viscosity, μ is the machine oil k value measuring under same temperature.
3. method as claimed in claim 1 or 2, is characterized in that, the ratio of sneaking into machine oil when diesel oil surpasses described proportion threshold value above sends warning in limited time.
4. in diesel engine, diesel oil is sneaked into a machine oil measurement mechanism, it is characterized in that, comprising:
Machine oil quality measurement sensor (10), described machine oil quality measurement sensor (10) is for monitoring the machine oil viscosity of diesel engine;
Sensor device stationary installation (20), described sensor device stationary installation (20) is connected with described machine oil quality measurement sensor (10), and described machine oil quality measurement sensor (10) is fixed in sump;
Embedded main board (40), for data processing and calculating;
CAN changes R232 serial ports (30), and described CAN conversion R232 serial ports (30) is connected with described machine oil quality measurement sensor (10), for the signal of machine oil quality measurement sensor (10) being converted to described embedded main board (40) acceptable signal;
Storage card (50), described storage card (50) is connected with described embedded main board, for data, stores; With
Liquid crystal display (60), described liquid crystal display (60) is connected with described embedded main board (40), for data, shows.
5. in diesel engine according to claim 4, diesel oil is sneaked into machine oil measurement mechanism, it is characterized in that, described sensor fastening device (20) comprising:
Upper cover (21), described upper cover (21) is tightly connected with sump;
Connecting link (22), the upper end of described connecting link (22) is connected with described upper cover, in described connecting link, is provided with data line;
Top cylinder (23) and doffing (24), described top cylinder (23) and described doffing (24) fasten, so that described machine oil quality measurement sensor (10) is fixed and to be sealed in described top cylinder (23) and described doffing (24), the upper end of described top cylinder (23) is connected with the lower end of described connecting link (22); With
Lower cover (25), described lower cover (25) is connected with the lower end of described doffing (24), for the protection of described machine oil quality measurement sensor (10).
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| CN201410149088.3A CN103954742B (en) | 2014-04-14 | 2014-04-14 | In diesel engine, diesel oil is mixed into machine oil measurement mechanism and measuring method |
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| Publication number | Publication date |
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| CN103954742B (en) | 2015-11-25 |
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