CN102167000A - Tractor power output control system and control method - Google Patents

Tractor power output control system and control method Download PDF

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Publication number
CN102167000A
CN102167000A CN2011100957353A CN201110095735A CN102167000A CN 102167000 A CN102167000 A CN 102167000A CN 2011100957353 A CN2011100957353 A CN 2011100957353A CN 201110095735 A CN201110095735 A CN 201110095735A CN 102167000 A CN102167000 A CN 102167000A
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China
Prior art keywords
rotation speed
power output
control unit
tachogen
rotating speed
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CN2011100957353A
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Chinese (zh)
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CN102167000B (en
Inventor
吴利谦
姜斌
王贡献
王站兴
付田志
唐卫平
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First Tractor Co Ltd
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China Yituo Group Corp Ltd
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Priority to CN201110095735.3A priority Critical patent/CN102167000B/en
Publication of CN102167000A publication Critical patent/CN102167000A/en
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Publication of CN102167000B publication Critical patent/CN102167000B/en
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  • Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
  • Arrangement And Driving Of Transmission Devices (AREA)

Abstract

The invention provides a tractor power output control system and a control method. The control system comprises a control unit, an electromagnetic valve, a rotation speed sensor, a power output switch and a displayer; the power output switch is connected with a power supply input end of the control unit; the control unit is connected with a power supply input end of the rotation speed sensor; and the control unit is connected with the displayer by an LIN (linear) bus. The control method comprises the steps: firstly, detecting the status of the rotation speed sensor by the control unit; judging whether the rotation speed sensor is faulted or not , if the rotation speed sensor is faulted, a power output unit is not jointed and a failure signal is sent to the displayer; if the rotation speed sensor is not faulted, detecting the rotation speed of a power output shaft, judging whether the rotation speed of the power output shaft exceeds the maximum allowed joint rotation speed, if the rotation speed exceeds the maximum joint rotation speed, the power output unit is not jointed and sends an error signal to the displayer; and if the rotation speed does not exceed the maximum allowed joint rotation speed, the power output unit is jointed, and sends a power output joint signal to the displayer.

Description

Tractor dynamic power output control system and control method
Technical field
The invention belongs to the trac. field of electric control, relate to a kind of tractor dynamic power output control system and control method.
Background technology
Takeoff output is a critical function of trac., and the external device (ED)s such as agricultural machinery and implement that are used for being equipped with to trac. provide power.On large tractor, the power-transfer clutch that common power output structure is a power take-off shaft by retarder and electrohydraulic control directly is connected with driving engine.Takeoff output control mainly is the joint of control takeoff output, the joint of takeoff output is meant that power take-off shaft changes to the synchronous slew mode of engine speed by quiescence and can transmit the process of rating horsepower, and just power output clutch is by the process that is separated to full engagement fully.In fact, the takeoff output Engagement Control is exactly the control to the power output clutch engagement time.On the one hand, the clutch engagement time is long more, and joint impact is more little; thereby the farm implements that help protecting mechanical transmission component and takeoff output to drive, on the other hand, the clutch engagement time is short more; the sliding wear time of clutch facing is short more, helps reducing the wearing and tearing of clutch facing.
What the takeoff output connection control method of large tractor was common has two kinds, a kind of is that takeoff output " soft " engages, promptly the joint to power output clutch adopts closed loop control, adjusts engagement time according to the takeoff output load, and effect can be well controlled.But this method need adopt expensive controller and proportion magnetic valve, in can't satisfying, the low side trac. is to the control of cost.Another kind method adopts switch electromagnetic valve control power output clutch, reduces joint impact by add energy storage in hydraulic circuit.The engagement time of this method is normally fixed, and can't be controlled effect preferably, but also can protect parts to a certain extent, and therefore this control method has application more widely.In order to realize the control of tractor dynamic power output, also need a control system of forming by electronics, electric component.
Summary of the invention
The object of the present invention is to provide a kind of reliability and high power take off control system and control method of degree of safety that is applicable to modern trac..For achieving the above object, the invention provides following technical scheme:
A kind of tractor dynamic power output control system comprises control unit, electromagnetic valve, tachogen, power take-off valve, telltale; The switch that outputs power connects the power input of control unit; Control unit connects the power input of tachogen; Control unit is by the total wire joint telltale of LIN.
The control method of tractor dynamic power output control system is as follows:
Control unit at first detects the state of tachogen;
Judge whether trouble free of tachogen,, do not engage power take-off unit, send breakdown signal to telltale if tachogen has fault;
If the tachogen trouble free then detects the rotating speed of power take-off shaft;
Whether the rotating speed of judging power take-off shaft is no more than maximum permission engaging rotating speed, if rotating speed surpasses the maximum engaging rotating speed that allows, does not engage power take-off unit, sends spurious signal to telltale;
If rotating speed is no more than the maximum engaging rotating speed that allows, engage power take-off unit, send takeoff output and engage signal to telltale.
The present invention can produce following beneficial effect after adopting technique scheme: the control takeoff output engages and can only finish under the condition that limits, and avoids the power take-off unit of trac. and relevant parts are caused damage; Show the state that takeoff output engages by telltale, make chaufeur can in time understand serviceability easily.
Description of drawings
Fig. 1 is the structure connection diagram of tractor dynamic power output control system of the present invention.
Fig. 2 is the control method diagram of circuit of tractor dynamic power output control system.
The specific embodiment
By the following examples, and in conjunction with the accompanying drawings, the invention will be further described.
As shown in Figure 1, the tractor dynamic power output control system comprises control unit 6, electromagnetic valve 5, tachogen 4, power take-off valve 7, telltale 8.
Control unit 6 adopts micro controller system as the master control chip, has tachogen 4 power supply and signal processing circuits, electromagnetic valve 5 driving circuits, LIN bus transmission circuit etc.
Power take-off valve 7 is connected to the power input of control unit 6.When power take-off valve 7 closures, control unit 6 energisings are started working.
Control unit 6 connects the power input of tachogen 4, for tachogen 4 provides working power.Control unit 6 can be used for by the working current that detects tachogen 4 determining whether tachogen 4 has fault.
Control unit 6 is connected to telltale 8 by the LIN bus, and control unit 6 is to telltale 8 transmit status information, the mode of operation of telltale 8 display control programs.
Control unit 6 drives electromagnetic valve 5, the break-make of control electromagnetic valve 5.During electromagnetic valve 5 conductings, power-transfer clutch 2 engages, and driving engine 1 connects and driving power take-off unit 3 by power-transfer clutch 2.When electromagnetic valve 5 disconnected, power-transfer clutch 2 separated, and driving engine 1 can not drive power take-off unit 3.
The takeoff output control method is moved in control unit 6 with software mode.When power take-off valve 7 closures, control unit 6 energising work, the control method that brings into operation software.
Control flow as shown in Figure 2, control unit 6 at first detects the state of power output shaft speed sensor 4; Judge then whether tachogen 4 has fault, the state-detection of tachogen 4 comprises that mainly its working current detects and output signal voltage detects, detected value is compared with normal range value, if there is one to exceed normal range and can assert that there is fault in sensor in the two; If there is fault in power output shaft speed sensor 4, illustrate that the rotating speed that detects is invalid under this state, therefore do not engage power take-off unit 3, send spurious signal to telltale 8; If tachogen 4 troubles free, then continue to detect power output shaft speed, detected tachometer value compares with the maximum engaging rotating speed that allows, if rotating speed is no more than the maximum engaging rotating speed that allows, just think that power output shaft speed is enough low, can engage power take-off unit this moment, sends takeoff output and engage signal to telltale 8; Otherwise think that power output shaft speed is too high, can not engage power take-off unit, send spurious signal to telltale 8.

Claims (2)

1. a tractor dynamic power output control system comprises control unit (6), electromagnetic valve (5), tachogen (4), power take-off valve (7), telltale (8); It is characterized in that: power take-off valve (7) connects the power input of control unit (6); Control unit (6) connects the power input of tachogen (4); Control unit (6) is by the total wire joint telltale of LIN (8).
2. the control method of tractor dynamic power output control system according to claim 1 is characterized in that:
A. control unit (6) at first detects the state of tachogen (4);
B. judge whether trouble free of tachogen (4),, do not engage power take-off unit (3), send breakdown signal to telltale (8) if tachogen (4) has fault; If tachogen (4) trouble free then detects the rotating speed of power take-off shaft;
Whether the rotating speed of c. judging power take-off shaft is no more than maximum permission engaging rotating speed, if rotating speed surpasses the maximum engaging rotating speed that allows, does not engage power take-off unit (3), sends spurious signal to telltale (8); If rotating speed is no more than the maximum engaging rotating speed that allows, engage power take-off unit (3), send takeoff output and engage signal to telltale (8).
CN201110095735.3A 2011-04-18 2011-04-18 Power output control system for tractor Active CN102167000B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201110095735.3A CN102167000B (en) 2011-04-18 2011-04-18 Power output control system for tractor

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Application Number Priority Date Filing Date Title
CN201110095735.3A CN102167000B (en) 2011-04-18 2011-04-18 Power output control system for tractor

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CN102167000A true CN102167000A (en) 2011-08-31
CN102167000B CN102167000B (en) 2016-04-13

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104007282A (en) * 2014-06-13 2014-08-27 四川亚美动力技术有限公司 Engine gasifier turbine rotating-speed and/or free turbine rotating-speed detection circuit
CN104950891A (en) * 2015-06-26 2015-09-30 湖南中天龙舟农机有限公司 Ploughing depth control system for crawler self-propelled rotary cultivator
CN106068900A (en) * 2016-06-22 2016-11-09 中联重机股份有限公司 Automatic control system, control method and control device for united reaper
CN114607512A (en) * 2022-04-20 2022-06-10 第一拖拉机股份有限公司 Engine rotating speed control method, controller and tractor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000255280A (en) * 1999-03-09 2000-09-19 Iseki & Co Ltd Pto control device of working vehicle
US6129187A (en) * 1996-11-15 2000-10-10 Agco Sa PTO shaft monitoring and control system
CN201272244Y (en) * 2008-07-28 2009-07-15 常州东风农机集团有限公司 Protector for wheel type tractor power output
CN101614277A (en) * 2009-07-30 2009-12-30 中国一拖集团有限公司 Tractor dynamic power shift gear box electrical control unit
CN202006769U (en) * 2011-04-18 2011-10-12 中国一拖集团有限公司 Power output control system for tractor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6129187A (en) * 1996-11-15 2000-10-10 Agco Sa PTO shaft monitoring and control system
JP2000255280A (en) * 1999-03-09 2000-09-19 Iseki & Co Ltd Pto control device of working vehicle
CN201272244Y (en) * 2008-07-28 2009-07-15 常州东风农机集团有限公司 Protector for wheel type tractor power output
CN101614277A (en) * 2009-07-30 2009-12-30 中国一拖集团有限公司 Tractor dynamic power shift gear box electrical control unit
CN202006769U (en) * 2011-04-18 2011-10-12 中国一拖集团有限公司 Power output control system for tractor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104007282A (en) * 2014-06-13 2014-08-27 四川亚美动力技术有限公司 Engine gasifier turbine rotating-speed and/or free turbine rotating-speed detection circuit
CN104950891A (en) * 2015-06-26 2015-09-30 湖南中天龙舟农机有限公司 Ploughing depth control system for crawler self-propelled rotary cultivator
CN106068900A (en) * 2016-06-22 2016-11-09 中联重机股份有限公司 Automatic control system, control method and control device for united reaper
CN106068900B (en) * 2016-06-22 2018-08-03 中联重机股份有限公司 Automatic control system, control method and control device for combine harvester
CN114607512A (en) * 2022-04-20 2022-06-10 第一拖拉机股份有限公司 Engine rotating speed control method, controller and tractor
CN114607512B (en) * 2022-04-20 2023-03-10 第一拖拉机股份有限公司 Engine rotating speed control method, controller and tractor

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Owner name: FIRST TRACTOR CO., LTD.

Free format text: FORMER OWNER: CHINA YITUO GROUP CO., LTD.

Effective date: 20130715

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Address after: 471039 No. 39, Xiyuan Road, Jianxi District, Henan, Luoyang

Applicant after: First Tractor Co., Ltd.

Address before: 471039 No. 39, Xiyuan Road, Jianxi District, Henan, Luoyang

Applicant before: China Yituo Group Co., Ltd.

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