CN101871845B - Undetached measurement device and method for transmission efficiency of automotive transmission system - Google Patents
Undetached measurement device and method for transmission efficiency of automotive transmission system Download PDFInfo
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Abstract
本发明涉及一种汽车传动系传动效率不拆卸测量装置及测量方法，该装置测量准确，效率高，装置制作容易，具有较高应用价值。本发明的技术方案：由第一转鼓、第二转鼓、电涡流测功器节臂、电涡流测功器、转鼓中心轴、联轴器组成；其中：该汽车传动系传动效率不拆卸测量装置还包括电涡流机节臂测力器、汽车驱动力测力器、调速电机；汽车后拖钩通过拉绳与汽车驱动力测力器连接，汽车驱动力测力器固定在定桩上。本发明的优点：可以解决不拆卸检测汽车发动机动力性和经济性困难的难题，实现汽车发动机动力性和经济性检测站快速检测。结合现代计算机技术，可以实现汽车发动机动力性和经济性检测快速显示，并当场打印结果。
The invention relates to a device and a method for measuring transmission efficiency of an automobile transmission system without disassembly. The device is accurate in measurement, high in efficiency, easy to manufacture and has high application value. The technical solution of the present invention is composed of the first rotating drum, the second rotating drum, the joint arm of the eddy current dynamometer, the eddy current dynamometer, the central shaft of the rotating drum, and a shaft coupling; wherein: the transmission efficiency of the automobile drive train is not The disassembly measurement device also includes the eddy current machine joint arm dynamometer, the vehicle driving force dynamometer, and the speed-regulating motor; on the pile. The invention has the advantages that it can solve the difficult problem of detecting the power and economy of the automobile engine without disassembly, and realize the rapid detection of the power and economy of the automobile engine. Combined with modern computer technology, it can realize the rapid display of vehicle engine power and economy detection, and print the results on the spot.
Description
Technical field
The present invention relates to a kind of power train measurement mechanism of automobile, particularly a kind of automotive transmission transmission efficiency is not dismantled measurement mechanism and measuring method.
Background technology
The automotive transmission form has various, and mechanical type is comparatively extensive, and along with continuous advancement in technology, the hydraulic type power train is more and more welcome.In order to reduce the oil consumption of automobile, wherein one of means are exactly to improve the transmission efficiency of power train, reduce the energy consumption of automobile self, and engine capacity is utilized.Mechanical power train transmission efficiency is the highest in all kinds of drive about 90%.Identical automobile slightly rises and falls with the difference of assembling, use, maintenance, and it is also relatively more difficult accurately to measure its size, does not have the equipment of specialty also to be difficult to measure.
The transmission efficiency of automobile equals chassis output and the ratio of engine to the power of chassis discrepancy, relates to two parameters of chassis output power and engine output.In recent years; The equipment of not dismantling measured automobiles chassis output power is more; Waterpower dynamometer, dynamometer and eddy current dynamometer are arranged, and technology is comparative maturity all, but it is comparatively rare not dismantle the equipment of measured automobiles engine capacity; More disassembling engine through stand method side from automobile gets its power, and be such cumbersome.
This device is on the basis of automobile chassis measurement of power; Adopt motor towing astern way; Measure the power that automotive transmission itself is consumed; Automobile chassis power measured when combining the automobile chassis measurement of power more just can obtain the power that motor car engine is exported, and also just can calculate the transmission efficiency of automotive transmission.
Summary of the invention
The object of the present invention is to provide a kind of automotive transmission transmission efficiency not dismantle measurement mechanism and measuring method, the present invention adopts the electromechanical technology, measures accurately, and efficient is high, and device is made easily, has higher using value.
Technical program of the present invention lies in:
A kind of automotive transmission transmission efficiency is not dismantled measurement mechanism, is made up of first rotary drum, second rotary drum, eddy current absorption dynamometer joint arm, eddy current absorption dynamometer, rotary drum central shaft, shaft coupling; Wherein: this automotive transmission transmission efficiency is not dismantled measurement mechanism and is also comprised current vortex machine joint arm dynamometer, automobile driving force dynamometer, buncher.
A kind of automotive transmission transmission efficiency is not dismantled measurement mechanism, is made up of first rotary drum, second rotary drum, eddy current absorption dynamometer joint arm, eddy current absorption dynamometer, rotary drum central shaft, shaft coupling; Wherein: this automotive transmission transmission efficiency is not dismantled measurement mechanism and is also comprised current vortex machine joint arm dynamometer, automobile driving force dynamometer, buncher; Towing hook is connected with automobile driving force dynamometer through stay cord behind the automobile, and automobile driving force dynamometer is fixed in the fixed stake; Automobile driving wheel rolls and contacts with first rotary drum, second rotary drum; One end of eddy current absorption dynamometer joint arm is installed in the outer ring of eddy current absorption dynamometer; Eddy current absorption dynamometer is installed in the outside of second rotary drum; Buncher is installed in the outside of first rotary drum, installs shaft coupling additional between the buncher and first rotary drum; Speed probe is installed on the rotary drum central shaft; The other end of eddy current absorption dynamometer joint arm is connected with current vortex machine joint arm dynamometer through stay cord, and current vortex machine joint arm dynamometer is fixed on the ceiling of measuring chamber, and the eddy current absorption dynamometer and first rotary drum, second rotary drum are installed on the rotary drum central shaft.
1, principle of work
(1) measurement of automobile chassis power P k.Disengaging coupling 9; Break off motor 10 and get in touch, start automobile and hang direct high with central shaft 8, after make gas to certain position; Make driving wheel 1 drive rotary drum 3; Regulate electric eddy current dynamometer 7 and apply load to automobile, making automobile driving wheel 3 stabilizations of speed is N rev/min, and export through pulling force sensor 5 and 6 and just can calculate chassis output Pk this moment.
(2) measurement of automotive transmission consumed power Pm.Adopt down automobile clutch, cut off engine and be connected with power train.The shaft coupling 9 that closes connects scalable motor 10 and central shaft 8, and starter motor turns to rotary drum 3 and be opposite when measuring chassis power, but rotating speed is identical.The reading of pickup 6 just can calculate vehicle transmission and tie up to the power P m that consumes when rotating speed is N rev/min at this moment.
(3) calculating of automobile engine power Pe.Pe＝Pk+Pm。
(4) calculating of automotive transmission transmission efficiency η.η＝(Pk÷Pe)×100％。
2, the composition of device
(1) hardware unit: two automobile driving wheels 1 of automobile are placed on first rotary drum 3 through the lifting machine; The line of centres of the center of automobile driving wheel 1 and first rotary drum 3 and ground vertical; Towing hook 2 usefulness stay cords are connected on the vertical columns behind the automobile, automobile driving force dynamometer 6 of series connection between stay cord.First rotary drum 3 is installed on the rotary drum central shaft 8; One end of rotary drum central shaft 8 has been installed an electric eddy current dynamometer 7; The eddy current absorption dynamometer joint arm 4 usefulness stay cords of electric eddy current dynamometer 7 are connected on another fixed column; Another current vortex machine joint arm dynamometer 5 of series connection between stay cord, eddy current absorption dynamometer joint arm 4 is L with the distance at stay cord point of fixity distance first rotary drum 3 centers.The other end of the rotary drum central shaft 8 of first rotary drum 3 buncher 10 of having connected, 8 of buncher 10 and rotary drum central shafts are equipped with the spline combined cover, can interrupt being connected of buncher 10 and rotary drum central shaft 8.
(2) software systems: comprise the A/D converting system of current vortex machine joint arm dynamometer 5 and automobile driving force dynamometer 6, the computation model of power, digital output system.
The beneficial effect of the invention is: process is simple, and compact equipment is made easily, and measuring speed is accurate soon, is fit to on-the-spot the detection, can be used for the detection of vehicle inspection and test station to vehicle dynamic quality and economic performance.
The invention has the advantages that: can separate never dismounting detection motor car engine dynamic property and economy problem of difficult, realize motor car engine dynamic property and economy measuring station fast detecting.In conjunction with The present computer technology, can realize that motor car engine dynamic property and economy detect fast to show, and print result then and there.The present invention adopts the electromechanical technology, measures accurately, and efficient is high, and device is made easily, has higher using value.
Description of drawings
Fig. 1 is a structure enlarged diagram of the present invention;
Fig. 2 is a fragmentary top TV structure enlarged diagram of the present invention;
Reference numeral: towing hook 2 behind automobile driving wheel 1, the automobile, first rotary drum 3, eddy current absorption dynamometer joint arm 4, current vortex machine joint arm dynamometer 5, automobile driving force dynamometer 6, eddy current absorption dynamometer 7, rotary drum central shaft 8, shaft coupling 9, buncher 10, second rotary drum 11.
Embodiment
Embodiment 1, a kind of automotive transmission transmission efficiency are not dismantled measurement mechanism, are made up of first rotary drum 3, second rotary drum 11, eddy current absorption dynamometer joint arm 4, eddy current absorption dynamometer 7, rotary drum central shaft 8, shaft coupling 9; Wherein: this automotive transmission transmission efficiency is not dismantled measurement mechanism and is also comprised current vortex machine joint arm dynamometer 5, automobile driving force dynamometer 6, buncher 10; Towing hook 2 is connected with automobile driving force dynamometer 6 through stay cord behind the automobile, and automobile driving force dynamometer 6 is fixed in the fixed stake; Automobile driving wheel 1 rolls and contacts with first rotary drum 3, second rotary drum 11; One end of eddy current absorption dynamometer joint arm 4 is installed in the outer ring of eddy current absorption dynamometer 7; Eddy current absorption dynamometer 7 is installed in the outside of second rotary drum 11; Buncher 10 is installed in the outside of first rotary drum 3, installs shaft coupling 9 additional between the buncher 10 and first rotary drum 3; Speed probe is installed on the rotary drum central shaft 8; The other end of eddy current absorption dynamometer joint arm 4 is connected with current vortex machine joint arm dynamometer 5 through stay cord, and the current vortex machine saves arm dynamometer 5 and is fixed on the ceiling of measuring chamber, and eddy current absorption dynamometer 7 and first rotary drum 3, second rotary drum 11 are installed on the rotary drum central shaft 8.
Embodiment 2, a kind of automotive transmission transmission efficiency are not dismantled measuring method, wherein: be made up of first rotary drum 3, second rotary drum 11, eddy current absorption dynamometer joint arm 4, eddy current absorption dynamometer 7, rotary drum central shaft 8, shaft coupling 9; Wherein: this automotive transmission transmission efficiency is not dismantled measurement mechanism and is also comprised current vortex machine joint arm dynamometer 5, automobile driving force dynamometer 6, buncher 10; Towing hook 2 is connected with automobile driving force dynamometer 6 through stay cord behind the automobile, and automobile driving force dynamometer 6 is fixed in the fixed stake; Automobile driving wheel 1 rolls and contacts with first rotary drum 3, second rotary drum 11; One end of eddy current absorption dynamometer joint arm 4 is installed in the outer ring of eddy current absorption dynamometer 7; Eddy current absorption dynamometer 7 is installed in the outside of second rotary drum 11; Buncher 10 is installed in the outside of first rotary drum 3, installs shaft coupling 9 additional between the buncher 10 and first rotary drum 3; Speed probe is installed on the rotary drum central shaft 8; The other end of eddy current absorption dynamometer joint arm 4 is connected with current vortex machine joint arm dynamometer 5 through stay cord, and the current vortex machine saves arm dynamometer 5 and is fixed on the ceiling of measuring chamber, and eddy current absorption dynamometer 7 and first rotary drum 3, second rotary drum 11 are installed on the rotary drum central shaft 8.
Break off being connected of motor 10 and rotary drum central shaft 8 earlier through shaft coupling 9; Start automobile and make throttle, hang that direct high makes automobile driving wheel 1 drive first rotary drum 3, second rotary drum 11 rotates to certain position; Regulate electric eddy current dynamometer 7; Give the automobile imposed load; Make automobile driving wheel 1 stabilization of speed at setting speed, measure the pulling force that acts on the eddy current absorption dynamometer joint arm 4, measure the friction force between automobile driving wheel 1 and first rotary drum 3, second rotary drum 11 through automobile driving force dynamometer 6 through current vortex machine joint arm dynamometer 5; Step on automobile clutch, cut off engine and be connected with power train; The shaft coupling 9 that closes connects buncher 10 and rotary drum central shaft 8, and starter motor drives first rotary drum 3, second rotary drum, 11 anti-automobile driving wheel 1 and the automotive transmissions of dragging; Rotating speed was the same when adjusting buncher 10 made automobile driving wheel 1 rotating speed and surveys automobile chassis power; Measure the friction force between automobile driving wheel 1 and first rotary drum 3, second rotary drum 11 through automobile driving force dynamometer 6.
Regulate electric eddy current dynamometer 7, give the automobile imposed load, make automobile driving wheel 1 stabilization of speed, be assumed to be N rev/min in some speed.This moment, dynamometer machine 7 acromere arms 4 can produce the rotation trend identical with the rotary drum rotation direction, and this trend obtains showing on the tautness meter that links to each other with stay cord 5.If this moment, tautness meter recorded the big or small F of being of pulling force; Dynamometer machine acromere arm 4 length are L, and the automobile driving wheel radius is r, and the rotary drum radius is R; Rolling resistance moment between driving wheel 1 and the rotary drum 3 is T0; The output torque of driving wheel 1 is T, and the friction force size between driving wheel 1 and the rotary drum 3 is shown by dynamometer 6, is made as F1.Then have:
Can get: T=F1 * (R+r)-F * L (Newton meter)
Chassis output power Pk=T * N/9550 (kilowatt), just measured chassis output power Pk thus.
Adopt down automobile clutch, cut off engine and be connected with power train.The shaft coupling 9 that closes connects scalable motor 10 and central shaft 8, starter motor, for make rotary drum to the driving wheel acting force to vehicle front, rotary drum 3 is turned to and opposite when measuring chassis power, be anti-automobile driving wheel and the automotive transmission of dragging of rotary drum at this moment.Regulate scalable motor 10, rotating speed is the same N of being rev/min when making the automobile driving wheel rotating speed and surveying automobile chassis power.If the anti-moment of dragging automobile driving wheel to apply of rotary drum is T1, this moment, dynamometer 6 demonstration power size was F2, then had:
T1＝F2×r
Power P m=T1 * N/9550 that automotive transmission consumed when rotating speed was N rev/min (kilowatt)
Motor car engine output power Pe=Pk+Pm (kilowatt)
Automotive transmission transmission efficiency η, η=Pk/Pe * 100%.
At vehicle inspection and test station, for improving detection efficiency, conveniently to export and print result, dynamometry and rotating speed are all used sensor, through A/D conversion input single-chip microcomputer.The single-chip microcomputer programmed through the mathematical model computing, easily obtains motor car engine output power Pe and automotive transmission transmission efficiency η.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010103620XA CN101871845B (en) | 2010-02-01 | 2010-02-01 | Undetached measurement device and method for transmission efficiency of automotive transmission system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010103620XA CN101871845B (en) | 2010-02-01 | 2010-02-01 | Undetached measurement device and method for transmission efficiency of automotive transmission system |
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| CN101871845A CN101871845A (en) | 2010-10-27 |
| CN101871845B true CN101871845B (en) | 2012-01-25 |
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| CN104089771A (en) * | 2014-07-07 | 2014-10-08 | 武汉理工大学 | Transmission efficiency testing method of micro car transmission shaft |
| CN104849064A (en) * | 2014-12-19 | 2015-08-19 | 北汽福田汽车股份有限公司 | Vehicle test method employing chassis dynamometer and drum adhering force adjusting method |
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| CN109470470B (en) * | 2018-11-09 | 2020-04-28 | 安徽江淮汽车集团股份有限公司 | System and method for testing mechanical efficiency of gearbox on whole vehicle |
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