CN205445812U - Loader is with automatically controlled diesel engine external characteristics calibration system - Google Patents

Abstract

The utility model discloses a loader is with automatically controlled diesel engine external characteristics calibration system, include the engine, torque converter, gearbox and the transaxle that connect gradually through the transmission shaft, torque converter passes through gear drive system with the steering pump of loader and working barrel respectively and is connected, sensor group will gather to such an extent that data acquisition system is given to rotational speed and moment of torsion signal transmission, the parameter transmission that data acquisition system will gather carries out the analysis to data process system, and analysis result will transmit for maring the computer, mark the computer and will mark the ECU that the engine electric control system was write in into to the result, in the test progressive tense, mark the computer and pass through the ECU control engine rotational speed, realize test automation. From the loader real work circumstances, the external characteristic curve of engine through the parameter of make true and engine, is demarcated to the hydraulic pump actually consumed the moment of torsion when different materials were adorned to the test shovel size, makes for the loader diesel engine work under different work condition and distinguishes in low oil consumption.

Description

A kind of loader electronic controlled diesel external characteristics calibration system

Technical field

This utility model relates to electromotor design field, particularly relates to a kind of loader electronic controlled diesel external characteristics calibration system.

Background technology

The external characteristics of diesel engine refers to keep throttle at maximum position, and each operating mode is again when optimum apjustment state, and the performance indications of electromotor and characterisitic parameter are with the Changing Pattern of rotating speed.The external characteristic curve of diesel engine defines diesel engine peak power output at each speed and moment of torsion, if diesel engine operates in the region outside external characteristic curve, may cause electromotor overload operation, produce black smoke and even can damage electromotor.The staking-out work of diesel engine is all on threst stand, uses electric dynamometer offered load, and the external characteristics proposed for client requires to carry out calibration experiment.

Loader electromotor mates dynamic property and the economy the most rationally directly affecting loader with fluid torque-converter.At present, loader electromotor generally uses total power coupling, Partial Power coupling or matching scheme of trading off to mate electromotor and fluid torque-converter.Total power coupling be engine test bench characteristic torque deduct that variable speed oil pump is fully loaded, steering pump and equipment oil pump zero load moment of torsion, obtain net torque characteristic curve.Partial Power coupling is that engine test bench characteristic torque deducts that variable speed oil pump is fully loaded, steering pump unloaded, and equipment oil pump is fully loaded with moment of torsion, obtains net torque characteristic curve.Compromise coupling it is generally acknowledged that match point is selected at ratio part big about the 50r/min of match point rotating speed, less than total power match point rotating speed.But loader actual job operating mode is complicated, hydraulic pump load change is frequently, larger difference is all there is in the practical situation of machining device hydraulic system consumption of engine torque with above-mentioned conventional 3 kinds of matching ways, electromotor all can not operate in or close proximity to low oil consumption district under different operating modes, it is impossible to ensures all preferable dynamic property and economy under each operating mode.

Utility model content

The purpose of this utility model is contemplated to solve the problems referred to above, a kind of loader electronic controlled diesel external characteristics calibration system is provided, native system can be from loader real work situation, the size of hydraulic pump actual consumption moment of torsion during test shovel dress different material, by adjusting the parameter of electromotor, demarcate the external characteristic curve of electromotor, make diesel engine for loader be operated in low oil consumption district under different operating modes.

To achieve these goals, this utility model adopts the following technical scheme that

A kind of loader electronic controlled diesel external characteristics calibration system, including the electromotor being sequentially connected with by power transmission shaft, fluid torque-converter, change speed gear box and drive axle, described fluid torque-converter is connected by pinion unit with steering pump and the working barrel of loader respectively；

Sensor group by gather rotating speed and torque signal pass to data collecting system, the parameter collected is transferred to data handling system and is analyzed by described data collecting system, analysis result will be passed to calibrated and calculated machine, and calibration result is write the ECU of engine electric-controlled system by calibrated and calculated machine；When test is carried out, calibrated and calculated machine controls engine speed by ECU, it is achieved test automation.

Described sensor group includes, described engine flywheel equipped with engine speed sensor, the working barrel torque sensor that the rotary shaft of described working barrel and steering pump is respectively provided with and steering pump torque sensor；On the power transmission shaft of described fluid torque-converter and change speed gear box equipped with gearbox torque sensor.

The beneficial effects of the utility model:

This utility model can be at loader in actual job operating mode, can be according to the size of the different hydraulic pump actual consumption moments of torsion of shovel dress material, determine the external characteristic curve that electromotor is corresponding, diesel engine for loader is made all to operate in low oil consumption district under different operating modes, it is achieved electromotor and the Proper Match of fluid torque-converter.

If electric-control motor and loader have multi-mode working, conversion is arranged, so external characteristic curve timing signal can determine according to shovel dress different material independence automatization, engine operating condition adaptability can be improved, all there is under different work working condition more preferable dynamic property and economy.

Accompanying drawing explanation

Fig. 1 is engine test bench characteristic calibration system schematic diagram of the present utility model；

Wherein, 1. electromotor, 2. engine speed sensor, 3. fluid torque-converter, 4. steering pump torque sensor, 5. steering pump, 6. working barrel, 7. working barrel torque sensor, 8. drive axle, 9. data collecting system, 10. change speed gear box, 11. data handling systems, 12. gearbox torque sensors, 13. calibrated and calculated machines, 14.ECU.

Fig. 2 is electromotor and fluid torque-converter cooperation curve；

N in figure₀For engine idle, n₁～n₂Interval for engine fuel economic zone rotating speed, n_maxFor the rotating speed that maximum engine torque point is corresponding, n_fFor electromotor and fluid torque-converter cooperation rotating speed, n_eFor rated engine speed；A point is n₂With the intersection point of fluid torque-converter input characteristic curve during i=0.5, fluid torque-converter input characteristic curve and n when B is i=0_maxIntersection point, C is idling point maximum torque point, the intersection point of input characteristic curve and maximum drawbar pull point corresponding rotating speed when D is i=0.Curve CM is diesel engine external characteristic curve, and curve MN is diesel engine speed regulation characteristic curve；

Fig. 3 is certain diesel engine whole performance map；

Fig. 4 is fluid torque-converter input characteristic curve figure；

Detailed description of the invention

The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.

A kind of loader electronic controlled diesel external characteristics calibration system, including:

As it is shown in figure 1, the electromotor 1 being sequentially connected with, fluid torque-converter 3, change speed gear box 10 and drive axle 6；Described electromotor 1, fluid torque-converter 3, change speed gear box 10 and drive axle 6 are all sequentially connected with by mechanical drive shaft；Described fluid torque-converter 3 is connected by pinion unit with steering pump 5 and the working barrel 6 of loader respectively；

Described electromotor 1 flywheel is equipped with engine speed sensor 2；

Working barrel torque sensor 7 and steering pump torque sensor 4 it is respectively provided with in the rotary shaft of described working barrel 6 and steering pump 5；

Described fluid torque-converter 3 is respectively provided with gearbox torque sensor 12 on the power transmission shaft of change speed gear box 10；

The data signal recorded is passed to data collecting system 9 by described engine speed sensor 2, working barrel torque sensor 7, steering pump torque sensor 4 and gearbox torque sensor 12 respectively；Described data collecting system 9 is by transmitted along to data handling system 11 for the parameter collected；

Data results is passed to calibrated and calculated machine 13 by described data handling system 11, calibrated and calculated machine 13 calibration result writes the ECU14 of engine electric-controlled system.

Use the scaling method of described a kind of loader electronic controlled diesel external characteristics calibration system, comprise the following steps,

Step (1), total power matching process is used to mate with fluid torque-converter in electromotor, i.e. the minimal torque of engine test bench characteristic torque deduction hydraulic system, obtains net torque characteristic curve, and external characteristic curve is total power with the intersection point of governor control characteristics and mates rated operation point.In fluid torque-converter primary characteristic matched curve accompanying drawing 3, find out best efficiency point i=i*, cross total power coupling rated operation point and do the load parabola of fluid torque-converter i=i*, the effective diameter of fluid torque-converter can be tried to achieve, determine fluid torque-converter；

Step (2), by bench test obtaining step (1) determined fluid torque-converter at the input characteristic curve of i=0 and i=0.5；

Step (3), obtains having outside electromotor performance plot by engine pedestal test, determines the interval (n of electromotor economical consumption of fuel district rotating speed₁-n₂), as it is shown on figure 3, n in this application example₁=1150r/min, n₂=1800r/min；

Step (4), determines characteristic point A, B, C, D；A point is n₂With the intersection point of fluid torque-converter input characteristic curve during i=0.5, fluid torque-converter input characteristic curve and n when B is i=0_maxIntersection point, n_maxFor the rotating speed that maximum engine torque point is corresponding, C is idling point maximum torque point, the intersection point of input characteristic curve and maximum drawbar pull point corresponding rotating speed when D is i=0；

Step (5), according to national standard GB/T 10170-2010 loader requirement of experiment, system described in the utility model is utilized to carry out V-type work cycle experiment, by segmentation merging, filtering and weighted average method, the test data of every kind of material are processed, obtain the mean consumption moment of torsion of hydraulic pump on loaders (including variable speed oil pump, steering pump and equipment oil pump)；

Step (6), demarcates four characteristic point external characteristics of electromotor according to 3 constraintss, i.e. engine speed is respectively n₀, n_max, n₂, n_fTorque value under four Feature point correspondence rotating speeds, the moment of torsion that engine test bench characteristic moment of torsion consumes plus the engine torque consumed when shoveling dress different material and engine accessory power rating equal to each characteristic point torque value, it may be assumed that

T=T_j+T_pump+T_loss(j=A, B, C, D)

Wherein, T_lossThe moment of torsion consumed for engine accessory power rating；

It is sequentially connected with on step (7), the characteristic point external characteristics that described step (6) is drawn and other essential feature point performance plots outside, i.e. obtains the engine test bench characteristic curve under corresponding operating mode.By calibrated and calculated machine, engine test bench characteristic curve is write ECU, complete to demarcate.

The process step of described step (5) is:

Step (5-1): set the rated engine speed of tetra-characteristic points of A, B, C, D on calibrated and calculated machine；

Step (5-2): carry out the V-type work cycle of four kinds of common materials such as stone material, bulk material, ratchel material and original soil material under each rotating speed respectively；

Step (5-3): data acquisition system is from engine speed sensor, working barrel torque sensor, steering pump torque sensor and the data signal of gearbox torque sensor, and passes to data handling system；

Step (5-4): the data handling system data signal to collecting carries out digital filtering process respectively, thus suppresses the interference of introducing process, the signal after finally processing passes to calibrated and calculated machine；

Step (5-5): the tach signal after data handling system processes passes to computer as current speed feedback signal, determines the need for being adjusted current rotating speed in order to calibrated and calculated machine；Working barrel torque data, steering pump torque data and gearbox torque data after data system transmission is processed by calibrated and calculated machine carry out classified storage according to present engine rotating speed.

In described step (2), shovel process of assembling analysis knowing, shovel process of assembling accounts for the 1/3 of whole cyclic process, so cycle operation process is main or distraction procedure.In shovel process of assembling, speed is relatively low, and torque-converters gear ratio groundwork is in the state of i < 0.5, so fluid torque-converter input characteristic curve when selecting i=0.5 in matching process.

In described step (5), if using mechanical pump, the moment of torsion of hydraulic system consumption can be tried to achieve by following formula

$T_{pump}=\underset{k=1}{\overset{4}{\&Sigma;}}{T}_k\&times;{\mathrm{\&alpha;}}_k$

T in formula_k: the motor torque of kth kind supplies consumption, N m；α_k: (common material is respectively as follows: k=1, stone material to kth kind common material operation ratio；K=2, bulk material；K=3, ratchel material；K=4, original soil material, and)；T_pump: 4 kinds of operation material weighted average torques, N m.

In described step (6), other external characteristics point moments of torsion of electromotor are demarcated according to operation characteristic.

In described step (6), the loader using this system and method to demarcate has multi-mode working conversion and arranges, and external characteristic curve timing signal can determine according to shovel dress different material independence automatization.

Shovel dress blinding and bulk material moment of torsion are close, and can be demarcated as an external characteristics, and shovel dress ratchel is one, and shovel dress original soil is one.

Set in loader four work translative mode, respectively mixed model, stone bulk material pattern, ratchel pattern and original soil pattern accordingly.During driver loader, can have more preferable adaptability for working condition according to work material is different from main separation mode of operation, electromotor also can have more preferable dynamic property and economy.

Although detailed description of the invention of the present utility model is described by the above-mentioned accompanying drawing that combines; but the not restriction to this utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art need not to pay various amendments or deformation that creative work can make still within protection domain of the present utility model.

Claims (2)

1. a loader electronic controlled diesel external characteristics calibration system, it is characterized in that, including the electromotor being sequentially connected with by power transmission shaft, fluid torque-converter, change speed gear box and drive axle, described fluid torque-converter is connected by pinion unit with steering pump and the working barrel of loader respectively；

Sensor group by gather rotating speed and torque signal pass to data collecting system, the parameter collected is transferred to data handling system and is analyzed by described data collecting system, analysis result will be passed to calibrated and calculated machine, and calibration result is write the ECU of engine electric-controlled system by calibrated and calculated machine；When test is carried out, calibrated and calculated machine controls engine speed by ECU, it is achieved test automation.

2. a kind of loader electronic controlled diesel external characteristics calibration system, it is characterized in that, described sensor group includes, described engine flywheel equipped with engine speed sensor, the working barrel torque sensor that the rotary shaft of described working barrel and steering pump is respectively provided with and steering pump torque sensor；On the power transmission shaft of described fluid torque-converter and change speed gear box equipped with gearbox torque sensor.