CN102167000B - Power output control system for tractor - Google Patents
Power output control system for tractor Download PDFInfo
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- CN102167000B CN102167000B CN201110095735.3A CN201110095735A CN102167000B CN 102167000 B CN102167000 B CN 102167000B CN 201110095735 A CN201110095735 A CN 201110095735A CN 102167000 B CN102167000 B CN 102167000B
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- power
- tachogen
- rotating speed
- control unit
- power output
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- Arrangement And Driving Of Transmission Devices (AREA)
Abstract
Power output control system for tractor and control method, comprise control unit, electromagnetic valve, tachogen, power take-off valve, telltale; Output power the power input of switch connection control unit; Control unit connects the power input of tachogen; Control unit connects telltale by LIN bus.Control method is: first control unit detects the state of tachogen; Judge tachogen whether trouble free, if tachogen has fault, not engaging power output unit, sends breakdown signal to telltale; If tachogen trouble free, then detect the rotating speed of power take-off shaft; Judge whether the rotating speed of power take-off shaft is no more than maximum permission engaging rotating speed, if rotating speed exceedes maximum permission engaging rotating speed, not engaging power output unit, sends spurious signal to telltale; If rotating speed is no more than maximum permission engaging rotating speed, engaging power output unit, sends Power output and engage signal to telltale.
Description
Technical field
The invention belongs to trac. field of electric control, relate to a kind of power output control system for tractor and control method.
Background technology
Power output is a critical function of trac., for give trac. the external device (ED)s such as the agricultural machinery and implement that are equipped with power is provided.On large tractor, common power output structure is that power take-off shaft is directly connected with driving engine by the power-transfer clutch of retarder and electrohydraulic control.Output control of engine power mainly controls the joint of Power output, the joint of Power output refers to that power take-off shaft changes to the slew mode synchronous with engine speed by quiescence and can transmit the process of rating horsepower, and namely power output clutch is by being separated to the process engaged completely completely.In fact, Power output Engagement Control is exactly the control to power output clutch engagement time.On the one hand, power-transfer clutch engagement time is longer, and joint impact is less; thus be conducive to the farm implements protecting mechanical transmission component and Power output to drive, on the other hand, power-transfer clutch engagement time is shorter; the sliding wear time of clutch facing is shorter, is conducive to the wearing and tearing reducing clutch facing.
The Power output connection control method of large tractor common are two kinds, one is that Power output " soft " engages, namely adopt closed loop control to the joint of power output clutch, according to Power output load adjustment engagement time, can be well controlled effect.But this method needs to adopt controller costly and proportion magnetic valve, in cannot meeting, low side trac. is to the control of cost.Another kind method adopts switch electromagnetic valve to control power output clutch, reduces joint impact by adding energy storage in hydraulic circuit.The engagement time of this method is normally fixing, cannot obtain good control effects, but also can protect parts to a certain extent, and therefore this control method has and applies more widely.In order to realize the control that tractor dynamic power exports, also need a control system be made up of electronics, electric component.
Summary of the invention
The object of the present invention is to provide a kind of be applicable to modern trac. reliability and the high power take off control system of degree of safety and control method.For achieving the above object, the invention provides following technical scheme:
A kind of power output control system for tractor, comprises control unit, electromagnetic valve, tachogen, power take-off valve, telltale; Output power the power input of switch connection control unit; Control unit connects the power input of tachogen; Control unit connects telltale by LIN bus.
The control method of power output control system for tractor is as follows:
First control unit detects the state of tachogen;
Judge tachogen whether trouble free, if tachogen has fault, not engaging power output unit, sends breakdown signal to telltale;
If tachogen trouble free, then detect the rotating speed of power take-off shaft;
Judge whether the rotating speed of power take-off shaft is no more than maximum permission engaging rotating speed, if rotating speed exceedes maximum permission engaging rotating speed, not engaging power output unit, sends spurious signal to telltale;
If rotating speed is no more than maximum permission engaging rotating speed, engaging power output unit, sends Power output and engage signal to telltale.
Following beneficial effect can be produced: control Power output and engage and can only complete under the condition limited, avoid causing damage to the power take-off unit of trac. and relevant parts after the present invention adopts technique scheme; By the state that telltale display Power output engages, make chaufeur can understand serviceability easily in time.
Accompanying drawing explanation
Fig. 1 is the anatomical connectivity schematic diagram of power output control system for tractor of the present invention.
Fig. 2 is the control method diagram of circuit of power output control system for tractor.
Detailed description of the invention
By the following examples, and by reference to the accompanying drawings, the invention will be further described.
As shown in Figure 1, power output control system for tractor comprises control unit 6, electromagnetic valve 5, tachogen 4, power take-off valve 7, telltale 8.
Control unit 6 adopts micro controller system as Master control chip, has tachogen 4 and powers and signal processing circuit, electromagnetic valve 5 driving circuit, 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 closes, control unit 6 energising is 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 determining whether tachogen 4 has fault by the working current detecting tachogen 4.
Control unit 6 is connected to telltale 8 by LIN bus, and control unit 6 sends status information to telltale 8, the mode of operation of telltale 8 display control program.
Control unit 6 drives electromagnetic valve 5, the break-make of Controlling solenoid valve 5.During electromagnetic valve 5 conducting, power-transfer clutch 2 engages, and driving engine 1 is connected by power-transfer clutch 2 and drives power take-off unit 3.When electromagnetic valve 5 disconnects, power-transfer clutch 2 is separated, and driving engine 1 can not drive power take-off unit 3.
Output control of engine power method is run in control unit 6 with software mode.When power take-off valve 7 closes, control unit 6 is energized work, the control method that brings into operation software.
As shown in Figure 2, first control unit 6 detects the state of power output shaft speed sensor 4 to control flow; Then judge whether tachogen 4 has fault, the state-detection of tachogen 4 mainly comprises its working current and detects and output signal voltage detection, detected value is compared with normal range value, if having one to exceed normal range in the two can assert that sensor exists fault; If power output shaft speed sensor 4 exists fault, illustrate that the rotating speed detected in this case is invalid, therefore not engaging power output unit 3, send spurious signal to telltale 8; If tachogen 4 trouble free, then continue to detect power output shaft speed, the tachometer value detected compares with maximum permission engaging rotating speed, if rotating speed is no more than maximum permission engaging rotating speed, just think that power output shaft speed is enough low, now can engaging power output unit, send Power output and engage signal to telltale 8; Otherwise think that power output shaft speed is too high, can not engaging power output unit, send spurious signal to telltale 8.
Claims (1)
1. a power output control system for tractor, comprises control unit (6), electromagnetic valve (5), tachogen (4), power take-off valve (7), telltale (8); It is characterized in that: control unit (6) adopts micro controller system as Master control chip, there is tachogen (4) power supply and signal processing circuit, electromagnetic valve (5) driving circuit, LIN bus transmission circuit, the power input of power take-off valve (7) connection control unit (6), when power take-off valve (7) is closed, control unit (6) energising is started working; Control unit (6) connects the power input of tachogen (4), for tachogen (4) provides working power; Control unit (6) connects telltale (8) by LIN bus, control unit (6) drives electromagnetic valve (5), the break-make of Controlling solenoid valve (5), during electromagnetic valve (5) conducting, power-transfer clutch (2) engages, and driving engine (1) is connected by power-transfer clutch (2) and drives power take-off unit (3), when electromagnetic valve (5) disconnects, power-transfer clutch (2) is separated, and driving engine (1) can not drive power take-off unit (3); Described power output control system for tractor adopts following control method:
A. control unit (6) first detects the state of tachogen (4);
B. tachogen (4) whether trouble free is judged, the state-detection of tachogen (4) comprises its working current and detects and output signal voltage detection, if tachogen (4) has fault, not engaging power output unit (3), sends breakdown signal to telltale (8); If tachogen (4) trouble free, then detect the rotating speed of power take-off shaft;
C. judge whether the rotating speed of power take-off shaft is no more than maximum permission engaging rotating speed, if rotating speed exceedes maximum permission engaging rotating speed, not engaging power output unit (3), sends spurious signal to telltale (8); If rotating speed is no more than maximum permission engaging rotating speed, engaging power output unit (3), sends Power output and engages signal to telltale (8).
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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110095735.3A CN102167000B (en) | 2011-04-18 | 2011-04-18 | Power output control system for tractor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102167000A CN102167000A (en) | 2011-08-31 |
| CN102167000B true CN102167000B (en) | 2016-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110095735.3A Active CN102167000B (en) | 2011-04-18 | 2011-04-18 | Power output control system for tractor |
Country Status (1)
| Country | Link |
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| CN (1) | CN102167000B (en) |
Families Citing this family (4)
| 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 |
| 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 |
| 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 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9623784D0 (en) * | 1996-11-15 | 1997-01-08 | Massey Ferguson Sa | PTQ shaft monitoring & 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 |
| CN101614277B (en) * | 2009-07-30 | 2013-01-16 | 中国一拖集团有限公司 | Electrical control unit of tractor dynamic power shift gear box |
| CN202006769U (en) * | 2011-04-18 | 2011-10-12 | 中国一拖集团有限公司 | Power output control system for tractor |
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2011
- 2011-04-18 CN CN201110095735.3A patent/CN102167000B/en active Active
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| Publication number | Publication date |
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| CN102167000A (en) | 2011-08-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| ASS | Succession or assignment of patent right |
Owner name: FIRST TRACTOR CO., LTD. Free format text: FORMER OWNER: CHINA YITUO GROUP CO., LTD. Effective date: 20130715 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20130715 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. |
|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |