CN105179083B - The tension-adjusting gear of adaptive engine front end accessory gear - Google Patents
The tension-adjusting gear of adaptive engine front end accessory gear Download PDFInfo
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- CN105179083B CN105179083B CN201510648159.9A CN201510648159A CN105179083B CN 105179083 B CN105179083 B CN 105179083B CN 201510648159 A CN201510648159 A CN 201510648159A CN 105179083 B CN105179083 B CN 105179083B
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- belt
- tension
- wheel
- tensioning wheel
- crankshaft
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Abstract
The invention discloses a kind of tension-adjusting gears of adaptive engine front end accessory gear, including motor head accessory wheel system and belt tension control system, belt tension control system includes piezoelectric transducer, angular encoder, comparator, controller and actuator, when the speed of crankshaft of engine is zero, tensioning wheel is in preset smaller belt tension position always；When the engine starts, speed of crankshaft is gradually increased by zero, and controller controls actuator action at once makes tensioning wheel be moved to preset larger belt tension position；After speed of crankshaft is stablized, the tension value acquired in piezoelectric transducer is compared by comparing device, then the position of tensioning wheel is adjusted by controller control actuator action with preset tension value, tensile force is made to maintain constant state.Engine crankshaft rotating speed can be measured in real time and dynamic tension that V-ribbed belt is subject to, the position of active accommodation tensioning wheel achievees the purpose that adaptive engine operating status adjusts belt tension.
Description
Technical field
The invention belongs to automotive engineering fields, and in particular to a kind of tension-adjusting gear of belt transmission system is especially sent out
The tension-adjusting gear of motivation front end accessory gear.
Background technology
Since late 1970s, more and more engine production producers use single V-ribbed belt（Also referred to as belt）
Many frontal attachments equipment of the driving including oil pump, power steering pump, compressor of air conditioner, water pump, generator etc. simultaneously.For
Ensure that reliable, the high-efficiency operation of this kind of drive, the tension of belt must keep stable.But belt work one section when
Between after can because of elongations such as aging, abrasions so that belt tension reduces, and belt acutely shake or even has skidded phenomenon, seriously
Influence the performance that belt transmits movement
Widely used automatic tensioner solves the problems, such as this in engineering, and automatic tensioner type used at present is more,
There are gravity type, elastic force type（Linear, swing arm）, fluid pressure type etc.；In actual operation, these stretchers can be in certain time
Ensure that belt is reliably tensioned automatically in range.But since tensile force when belt works is not easy to measure, stretcher structural parameters
（Mainly rigidity, damping）Setting and location arrangements more sets of plan are mainly formulated by theoretical calculation, then in conjunction with experiment
Mode determine preferred embodiment.This method is time-consuming and laborious, to professional more demanding, and cannot be guaranteed stretcher in the full longevity
It orders in the period, the variation of Belt Length can be adapted to and provide and change appropriate tensile strength small as possible.
Invention content
The present invention is intended to provide a kind of tension-adjusting gear of motor head accessory wheel system, it can adaptive engine operation
State adjusts belt tension, and response is sensitive, and adjustable range is wide.
For this purpose, used technical solution is：A kind of tension-adjusting gear of adaptive engine front end accessory gear, packet
Include motor head accessory wheel system and belt tension control system, the motor head accessory wheel system includes crankshaft pulley, more
Wedge band, Water-pump belt wheel, air conditioner compressor belt pulley, generator belt wheel, electronic-controlled power steering pump belt wheel, tensioning wheel and two idle pulleys, it is described
Crankshaft pulley drives Water-pump belt wheel, air conditioner compressor belt pulley, generator belt wheel, electronic-controlled power steering pump belt wheel by V-ribbed belt, special
Sign is：The belt tension control system includes piezoelectric transducer, angular encoder, comparator, controller and actuator, institute
Tensile force of the piezoelectric transducer for obtaining V-ribbed belt in real time on tensioning wheel is stated, angular encoder is mounted on crankshaft pulley
On speed of crankshaft for obtaining engine；
When the speed of crankshaft of engine is zero, tensioning wheel is in preset smaller belt tension position always；Work as hair
When motivation starts, speed of crankshaft is gradually increased by zero, and controller controls actuator action at once, and so that tensioning wheel is moved to pre-
If larger belt tension position；After speed of crankshaft is stablized, by comparing device by the tension value acquired in piezoelectric transducer
It is compared with preset tension value, then the position of tensioning wheel is adjusted by controller control actuator action, tensile force is made to remain permanent
Fixed state.
The first as said program is preferred, and the actuator includes hydraulic cylinder, piston rod, 3-position 4-way electro-hydraulic servo
Valve, hydraulic pump and fuel tank, the controller adjust piston rod movement by controlling the movement of 3-position 4-way electrohydraulic servo valve, living
Stopper rod drives tensioning wheel to move to position appropriate again.
Preferably, the actuator includes linear motor and piston rod for second as said program, and linear motor pushes
Piston rod movement, piston rod drive tensioning wheel to move to position appropriate again, and controller controls the positive and negative rotation of linear motor.
The beneficial effects of the invention are as follows：Compared with existing automatic tensioner, the present invention can measure engine song in real time
The dynamic tension that rotating speed and V-ribbed belt are subject to, and actuator action, the position of active accommodation tensioning wheel are controlled by controller
It sets, achievees the purpose that adaptive engine operating status adjusts belt tension, have that respond sensitive, adjustable range wide etc. excellent
Point；The location arrangements of each engine accessory power rating belt wheel are more flexible, greatly reduce the research and development difficulty and workload of designer；By
Have the function of adaptive engine operating condition adjust automatically tension in the present invention, larger tensioning is provided when the engine operates
Compared with belt lace tensile force, therefore power when the engine is not in operation, is only maintained with ensureing that entire front end accessory gear works normally
Substantially increase V belt translation performance and the service life of band.
Description of the drawings
Fig. 1 is the structure principle chart of the present invention.
Fig. 2 is the first embodiment of the present invention.
Fig. 3 is second of embodiment of the present invention.
Wherein：1, idle pulley；2, Water-pump belt wheel；3, crankshaft pulley；4, V-ribbed belt；5, air conditioner compressor belt pulley；6, hydraulic cylinder；
7, generator belt wheel；8, electronic-controlled power steering pump belt wheel；9, tensioning wheel；10, piezoelectric transducer；11, actuator；12, piston rod；13、
Angular encoder；14, comparator；15, controller；16, hydraulic pump；17, filter；18, fuel tank；19, check valve；20, overflow
Valve；21,3-position 4-way electrohydraulic servo valve；22, linear motor；23, damper.
Specific implementation mode
By way of example and in conjunction with the accompanying drawings, the invention will be further described：
As shown in Figure 1, a kind of tension-adjusting gear of adaptive engine front end accessory gear, mainly including before engine
Hold two parts of accessory wheel system and belt tension control system.
Motor head accessory wheel system mainly by crankshaft pulley 3, V-ribbed belt 4, Water-pump belt wheel 2, air conditioner compressor belt pulley 5,
Generator belt wheel 7, electronic-controlled power steering pump belt wheel 8, tensioning wheel 9 and two idle pulleys 1 form.Crankshaft pulley 3 drives water by V-ribbed belt 4
Pump belt wheel 2, air conditioner compressor belt pulley 5, generator belt wheel 7, electronic-controlled power steering pump belt wheel 8.Motor head accessory wheel system belongs to vapour
The component part of car engine, details are not described herein.
Belt tension control system includes piezoelectric transducer 10, angular encoder 13, comparator 14, controller 15 and executes
Device 11, piezoelectric transducer 10 are mounted on the tensile force for obtaining V-ribbed belt 4 in real time on tensioning wheel 9, and angular encoder 13 is installed
Speed of crankshaft in crankshaft pulley 3 for obtaining engine.
When the speed of crankshaft of engine is zero（Before engine start and after flame-out）, tensioning wheel 9 is always in preset
Smaller belt tension position, V-ribbed belt 4 maintain smaller tension state always.When the engine starts, speed of crankshaft by
Zero starts to gradually increase, and controller 15 controls the action of actuator 11 at once makes tensioning wheel 9 be moved to preset larger belt
Power position.After speed of crankshaft is stablized, by comparing device 14 by tension value and the preset tension acquired in piezoelectric transducer 10
Value comparison, then the action of actuator 11 is controlled to adjust the position of tensioning wheel 9 by controller 15, it realizes and belt tension is maintained to stablize
Purpose, make tensioning wheel 9 always be in optimal position, it is ensured that V-ribbed belt 4 always be in optimum tension state.
Concrete operating principle is as follows：Using piezoelectric transducer 10 obtain 4 operation process of V-ribbed belt in 9 bearing of tensioning wheel by
Pressing force, tensioning wheel 9 and the cornerite of V-ribbed belt 4 areθ, because tensioning wheel 9 does not load, it is possible to think tensioning wheel 9 its
Middle 4 tensile force of side V-ribbed beltF 1 With other side tensile forceF 2 It is equally big, of V-ribbed belt can be calculated by following formula in this way
Clamp forceF。
Meanwhile angular encoder 13 being installed in crankshaft pulley 3, for measuring speed of crankshaft and signal being transmitted to control
Device 15.First, before an engine is started, speed of crankshaft 0, at this time the belt tension value very little of 9 position of tensioning wheel.Work as hair
When motivation starts, controller 15, which immediately passes through actuator 11, makes tensioning wheel 9 move to larger belt tension position；When engine song
When axis steady running, 4 tensile force of V-ribbed belt measured at this time will be compared with pre-tension by comparing device 14, when
When measured value is inconsistent with preset value, controller 15 controls actuator 11 to adjust the position of tensioning wheel 9.
As shown in Fig. 2, actuator 11 is mainly by hydraulic cylinder 6, piston rod 12,3-position 4-way electrohydraulic servo valve 21, hydraulic pump
16 and fuel tank 18 form.Fuel tank 18 by hydraulic pump 16 be 6 fuel feeding of hydraulic cylinder, fuel delivery number by 3-position 4-way electro-hydraulic servo
Valve 21 controls.One end of piston 12 is stretched into hydraulic cylinder 6, and the other end of piston 12 is connected with tensioning wheel 9.Controller 15 passes through control
The movement of 3-position 4-way electrohydraulic servo valve 21 processed moves to adjust piston rod 12, and it is suitable that piston rod 12 drives tensioning wheel 9 to move to again
When position.
When measuring obtained 4 tensile force of V-ribbed belt less than preset value, △FFor positive value, 3-position 4-way electrohydraulic servo valve 21
Left position function is connected, and the piston rod 12 on hydraulic cylinder 6 pushes tensioning wheel 9 toward extension, and 4 tensile force of V-ribbed belt increases.When measuring
When the V-ribbed belt tensile force arrived is more than preset value, △FFor negative value, 3-position 4-way electrohydraulic servo valve 21, which moves to right, makes right median function connect
Logical, toward retraction, 4 tensile force of V-ribbed belt reduction works as to be measured obtained V-ribbed belt tensile force and presets the pulling tensioning wheel 9 of piston rod 12
When equal when value, △F=0,3-position 4-way electrohydraulic servo valve 21 is in middle position, is exported without flow, piston rod 12 and tensioning wheel 9
Stop motion（Locking）, V-ribbed belt 4 is made to be put into the state that tensile force remains constant.By the position of active control tensioning wheel 9, reach
The purpose that automatic 4 tensile force of maintenance V-ribbed belt is stablized is arrived.After engine misses, speed of crankshaft is kept to 0, at this time controller 15
By acting on piston rod 12, tensioning wheel 9 is set to retract to the position before starting so that the tensile force of V-ribbed belt 4 maintains smaller value
State.
Preferably, overflow valve 20 and check valve 19 are provided between fuel tank 18 and 3-position 4-way electrohydraulic servo valve 21.Overflow
Valve 20 plays the role of safety valve.Outside except this, hydraulic pump 16 is also equipped with filter 17.
As shown in figure 3, actuator 11 is mainly made of linear motor 22 and piston rod 12.Linear motor 22 pushes piston rod
12 movements, piston rod 12 drive tensioning wheel 9 to move to position appropriate again, and controller 15 controls the positive and negative rotation of linear motor 22.
Preferably, damper 23 is additionally provided between linear motor 22 and piston rod 12, damper 23 is being subtracted by shock absorber casing, setting
The spring 23a and hydraulic oil 23b compositions to shake in device shell.
Functional effect is identical as the actuator 11 described in Fig. 2, but it is to push piston rod 12 by controlling linear motor 22
It is moved with tensioning wheel 9, and then realizes the purpose for adjusting 4 tensile force of V-ribbed belt in real time.Because including hydraulic oil inside damper 23
23a and spring 23b, it is thus possible to absorb the impact under each operating mode of V belt translation, reduce the tensioning fluctuation and its cross of V-ribbed belt 4
To vibration.
Angular encoder 13 can be substituted by itself speed probe in automobile engine, and controller 15 is desirably integrated into automobile
Electronic control unit（ECU）In, not only reduce cost in this way, but also improve feasibility.
Claims (5)
1. a kind of tension-adjusting gear of adaptive engine front end accessory gear, including motor head accessory wheel system and belt
Tension control system, the motor head accessory wheel system includes crankshaft pulley（3）, V-ribbed belt（4）, Water-pump belt wheel（2）, air-conditioning
Compressor belt wheel（5）, generator belt wheel（7）, electronic-controlled power steering pump belt wheel（8）, tensioning wheel（9）With two idle pulleys（1）, the bent axle
Belt wheel（3）Pass through V-ribbed belt（4）Drive Water-pump belt wheel（2）, air conditioner compressor belt pulley（5）, generator belt wheel（7）, electronic-controlled power steering
Pump belt wheel（8）, it is characterised in that：The belt tension control system includes piezoelectric transducer（10）, angular encoder（13）, ratio
Compared with device（14）, controller（15）And actuator（11）, the piezoelectric transducer (10) be mounted on tensioning wheel (9) bearing on be used for
The pressing force that tensioning wheel (9) bearing is subject in V-ribbed belt (4) operation process is obtained in real timeF z , and pass through formulaObtain the tensile force of V-ribbed belt (4)F, whereinF 1 For more wedges of tensioning wheel (9) wherein side
The tensile force of band (4), wherein F 2 For the tensile force of the V-ribbed belt (4) of tensioning wheel (9) other side,θFor tensioning wheel (9) and more wedges
The cornerite of band (4)；Angular encoder（13）Mounted on crankshaft pulley（3）On speed of crankshaft for obtaining engine；
When the speed of crankshaft of engine is zero, tensioning wheel（9）Always it is in preset smaller belt tension position；When starting
When machine starts, speed of crankshaft is gradually increased by zero, controller（15）Actuator is controlled at once（11）Action makes tensioning wheel（9）
It is moved to preset larger belt tension position；After speed of crankshaft is stablized, by comparing device（14）By piezoelectric transducer
（10）Acquired tension value is compared with preset tension value, then by controller（15）Control actuator（11）Action is opened to adjust
Bearing up pulley（9）Position, so that tensile force is maintained constant state.
2. the tension-adjusting gear of adaptive engine front end accessory gear described in accordance with the claim 1, it is characterised in that：Institute
State actuator（11）Including hydraulic cylinder（6）, piston rod（12）, 3-position 4-way electrohydraulic servo valve（21）, hydraulic pump（16）And fuel tank
（18）, the controller（15）By controlling 3-position 4-way electrohydraulic servo valve（21）Movement adjust piston rod（12）Movement,
Piston rod（12）Tensioning wheel is driven again（9）Move to position appropriate.
3. the tension-adjusting gear of adaptive engine front end accessory gear according to claim 2, it is characterised in that：Institute
State fuel tank（18）With 3-position 4-way electrohydraulic servo valve（21）Between be provided with overflow valve（20）And check valve（19）.
4. the tension-adjusting gear of adaptive engine front end accessory gear described in accordance with the claim 1, it is characterised in that：Institute
State actuator（11）Including linear motor（22）And piston rod（12）, linear motor（22）Push piston rod（12）Movement, piston
Bar（12）Tensioning wheel is driven again（9）Move to position appropriate, controller（15）Control linear motor（22）Positive and negative rotation.
5. the tension-adjusting gear of adaptive engine front end accessory gear according to claim 4, it is characterised in that：Institute
State linear motor（22）With piston rod（12）Between be additionally provided with damper（23）, the damper（23）Including damper shelf
The spring in damper shelf body is arranged in body（23a）And hydraulic oil（23b）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510648159.9A CN105179083B (en) | 2015-11-09 | 2015-11-09 | The tension-adjusting gear of adaptive engine front end accessory gear |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510648159.9A CN105179083B (en) | 2015-11-09 | 2015-11-09 | The tension-adjusting gear of adaptive engine front end accessory gear |
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| Publication Number | Publication Date |
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| CN105179083A CN105179083A (en) | 2015-12-23 |
| CN105179083B true CN105179083B (en) | 2018-10-19 |
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| CN201510648159.9A Expired - Fee Related CN105179083B (en) | 2015-11-09 | 2015-11-09 | The tension-adjusting gear of adaptive engine front end accessory gear |
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| CN108561224A (en) * | 2018-03-16 | 2018-09-21 | 浙江吉利汽车研究院有限公司 | Belt drive system, belt tension method and automobile |
| CN108412988B (en) * | 2018-04-03 | 2024-03-05 | 博格华纳汽车零部件(宁波)有限公司 | Belt transmission device for starting generator |
| CN109115487B (en) * | 2018-07-12 | 2020-09-25 | 四川大学 | Working circuit and working method for testing dynamic performance of belt transmission system |
| CN109187010B (en) * | 2018-07-12 | 2020-10-30 | 四川大学 | Dynamic performance testing device for belt transmission system |
| CN109027154B (en) * | 2018-09-25 | 2022-04-12 | 浙江吉利控股集团有限公司 | Tensioning system and engine assembly |
| CN110836250A (en) * | 2019-11-29 | 2020-02-25 | 四川大学 | Intelligent belt tightness adjusting device for BSG system of hybrid electric vehicle |
| CN111706653A (en) * | 2020-05-11 | 2020-09-25 | 江苏大学 | Optical engine transmission belt tensioning adjusting device and adjusting method |
| EP4001695A1 (en) * | 2020-11-20 | 2022-05-25 | Manuel Lindner | Automatic adjustment and monitoring of a belt drive |
| CN114321301A (en) * | 2021-12-13 | 2022-04-12 | 浙江吉利控股集团有限公司 | Tensioning device, engine front-end wheel train, tension control method and device |
| CN114659792B (en) * | 2022-03-17 | 2023-10-20 | 东风汽车集团股份有限公司 | Belt tension control method and control system |
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