CN102416948B - Hydrostatic control system for multifunctional off-road forklift - Google Patents
Hydrostatic control system for multifunctional off-road forklift Download PDFInfo
- Publication number
- CN102416948B CN102416948B CN201110306756.5A CN201110306756A CN102416948B CN 102416948 B CN102416948 B CN 102416948B CN 201110306756 A CN201110306756 A CN 201110306756A CN 102416948 B CN102416948 B CN 102416948B
- Authority
- CN
- China
- Prior art keywords
- controller
- operating mechanism
- control
- engine
- multifunctional
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention discloses a hydrostatic control system for a multifunctional off-road forklift. The hydrostatic control system consists of a controller, a running mechanism pressure sensor, an operating mechanism pressure sensor, an engine rotation speed sensor, a forward/back pedal, an operating mechanism operating handle, a diesel engine, an accelerator actuating motor, an electric control variable displacement pump, an operating mechanism constant displacement pump and an operating mechanism electric control proportional valve. The system can control vehicles to normally run and the operating mechanism to normally work, realizes compound control and unified operation of the running mechanism and the operating mechanism, ensures that the engine rotation speed is matched with power consumption, and improves fuel utilization rate.
Description
Technical field
The present invention relates to a kind of hydrostatic control system of multifunctional off-road forklift.
Background technology
Multifunctional off-road forklift is a kind of for solving rural atmosphere lower tray unit load and drawing the handling machinery of Stuff (to) operation.It adopts telescopic boom operating mechanism, can supporting multiple accessory, complete lifting, little earthwork, the multiple additional functioies such as bulk cargo handling.
This car has adopted static hydraulic drive system, is divided into traveling mechanism and operating mechanism's two parts, and wherein traveling mechanism is used for driving vehicle forward-reverse, and operating mechanism is used for controlling the actions such as large arm is flexible, lifting.Due to shared same the driving engine of traveling mechanism and operating mechanism, if two systems independent controls respectively, in Vehicle Driving Cycle process, when operation element mechanism changes engine speed, the speed of a motor vehicle also will change thereupon, affect the normal control of traveling mechanism.In addition,, if not according to vehicle operating load adjustment engine speed, just can not maximally utilise the power of driving engine, cause fuel utilization ratio not high.
Summary of the invention
The object of the present invention is to provide a kind of hydrostatic control system for multifunctional off-road forklift, power when this system can detect vehicle operating in real time, and regulate engine speed with this, itself and consumed power are matched, thereby raising fuel utilization ratio, and when Vehicle Driving Cycle operation element mechanism can to maintain moving velocity constant.
For realizing above-mentioned control system, take following technical scheme:
Hydrostatic control system of the present invention is comprised of controller, traveling mechanism pressure sensor, operating mechanism's pressure sensor, engine speed sensor, forward-reverse pedal, operating mechanism's operating handle, diesel motor, throttle actuating motor, automatically controlled controllable capacity pump, operating mechanism's fix-displacement pump, operating mechanism's electronically controlled proportional valve.Wherein:
Controller is arranged in the electric control box on front vehicle frame right side, for receiving the input of forward-reverse pedal, operating mechanism's operating handle and each sensor, differentiates current state, and with this control engine rotating speed, controllable capacity pump discharge capacity and electronically controlled proportional valve flow.
Traveling mechanism pressure sensor is arranged on automatically controlled controllable capacity pump both sides, and its signal wire (SW) is connected with controller input end of analog signal.Difference of pressure while moving for detection of driving system.
Operating mechanism's pressure sensor is installed on operating mechanism's electronically controlled proportional valve, and its signal wire (SW) is connected with controller input end of analog signal.System pressure while moving for detection of operating mechanism.
Engine speed sensor is arranged on driving engine, and its signal wire (SW) is connected with controller frequency signal test side.For detection of engine speed.
Forward-reverse pedal is arranged in operator's compartment, and its signal wire (SW) is connected with controller input end of analog signal.The forward-reverse sending for detection of operator and moving velocity command signal.
Operating mechanism's operating handle is arranged in operator's compartment, by CAN bus, is connected with controller.The job category sending for detection of operator and work speed command signal.
Diesel motor is arranged on rear vehicle frame, by throttle actuating motor, by bracing wire, controls throttle size, controls rotating speed, drives controllable capacity pump and fix-displacement pump to rotate, for car load provides power.
Throttle actuating motor adopts linear electric motors, is arranged on rear vehicle frame, is connected with the magnitude of current output port of controller, controls it and pulls acceleration cable, control engine rotating speed by controller.
Automatically controlled controllable capacity pump is arranged on rear vehicle frame, and by driven by engine, it rotates, and controller is controlled its discharge capacity, promotes traveling mechanism operation.
Operating mechanism's fix-displacement pump is arranged on rear vehicle frame, and by driven by engine, it rotates, and mechanism's operation pushes the work forward.
Electronically controlled proportional valve is arranged on below, operator's compartment right side, and its control signal wire is connected to the current output terminal of controller, for controlling type of action and the running velocity of operating mechanism.
The present invention, for the hydrostatic control system of multifunctional off-road forklift, can carry out step-less adjustment to engine speed; By stretcher, control forward-reverse and the moving velocity of vehicle; By operating handle, control type of action and the running velocity of operating mechanism; Realized the compound control of traveling mechanism and operating mechanism, cooperation, has improved the convenience of vehicle operating; Realize engine speed and consumed power matches, improved system fuel utilization ratio.
Accompanying drawing explanation
Fig. 1, Fig. 2 are the installation site of each component part of the present invention on multifunctional off-road forklift.
Fig. 3 is traveling mechanism structure principle chart of the present invention.
Fig. 4 is operating mechanism of the present invention structure principle chart.
Below in conjunction with accompanying drawing, content of the present invention is described in further detail.
The specific embodiment
With reference to Fig. 1～Fig. 4, the present invention is comprised of controller (3), traveling mechanism pressure sensor (4), operating mechanism's pressure sensor (5), engine speed sensor (6), forward-reverse pedal (7), operating mechanism's operating handle (8), diesel motor (9), throttle actuating motor (10), automatically controlled controllable capacity pump (11), operating mechanism's fix-displacement pump (12), operating mechanism's electronically controlled proportional valve (13).
Engine speed sensor (6) feeds back to controller (3) by engine speed, controller (3) is compared present engine rotating speed and target engine speed, if present engine rotating speed is less than target engine speed, controller (3) is controlled throttle actuating motor (10) retraction to strengthen engine throttle, promotes rotating speed; If present engine rotating speed is greater than in target engine speed, controller (3) is controlled throttle actuating motor (10) and is stretched out to reduce engine throttle, reduces rotating speed, realizes the real-time control of engine speed.
Controller (3) receives signal judgement current driving direction and the moving velocity expected value of forward-reverse stretcher (7), according to moving velocity expected value, determines traveling mechanism target flow.Simultaneously, controller is according to the detected difference of pressure of traveling mechanism pressure sensor (4), adopt sef-adapting filter to obtain pressure trend, predict the pressure of next control cycle, by target flow and forecast pressure, calculate system power, mate driving engine (9) horsepower curve, determine the rotating speed of target value of driving engine, according to the target flow of driving system, calculate the target discharge capacity of controllable capacity pump simultaneously.Direction, discharge capacity according to above-mentioned expected value difference control engine (9) rotating speed and controllable capacity pump (11), realize the control of travelling of vehicle.
Controller (3) receives the signal judgement work at present mechanism action type of operating mechanism's operating handle (8) and the expected value of running velocity.According to type of action, determine the electronically controlled proportional valve that need to open, according to running velocity, determine the expected value of driving engine (9) rotating speed and apportioning valve (13) flow.According to expected value control engine (9) rotating speed and apportioning valve (13) flow, realize the control to vehicle operation mechanism.
In Vehicle Driving Cycle process, when operation element mechanism causes engine speed to change, controller (3) recalculates the target discharge capacity of controllable capacity pump (11) according to the current rotating speed of traveling mechanism target flow and driving engine (9), with this control variable pump (11), maintain traveling mechanism flow constant, realized the normal moving velocity of the former right maintenance of operation element mechanism under motoring condition and controlled.
The adjusting of the travelling of fork truck, operation and engine speed is by controller (3) by gathering the signal of forward-reverse pedal (7), operating mechanism's operating handle (8) and related sensor, and the mode of sending instruction to automatically controlled controllable capacity pump (11), electronically controlled proportional valve (13) and throttle actuating motor (10) respectively through calculating realizes.
Controller (3) is by traveling mechanism pressure sensor (4), operating mechanism's pressure sensor (5) acquisition system pressure, and adopt sef-adapting filter to obtain pressure trend, with this, predict the pressure of next control cycle, calculate system power, coupling driving engine (9) horsepower curve, determines engine speed.
Fork truck is in the process of moving during operation element mechanism, and controller (3) keeps the normal control to traveling mechanism by the mode of regulated variable pump (11) discharge capacity, realizes traveling mechanism and operating mechanism and is independent of each other when joint operation.
Claims (5)
1. a hydrostatic control system for multifunctional off-road forklift, by controller (3), traveling mechanism pressure sensor (4), operating mechanism's pressure sensor (5), engine speed sensor (6), forward-reverse pedal (7), operating mechanism's operating handle (8), diesel motor (9), throttle actuating motor (10), automatically controlled controllable capacity pump (11), operating mechanism's fix-displacement pump (12), operating mechanism's electronically controlled proportional valve (13) forms, it is characterized in that, controller (3) is arranged in the electric control box on front vehicle frame (1) right side, traveling mechanism pressure sensor (4) is arranged on automatically controlled controllable capacity pump (11) both sides, signal wire (SW) is connected with controller (3) input end of analog signal, operating mechanism's pressure sensor (5) is installed on operating mechanism's electronically controlled proportional valve (13), signal wire (SW) is connected with controller (3) input end of analog signal, engine speed sensor (6) is arranged on driving engine, signal wire (SW) is connected with controller (3) frequency signal test side, forward-reverse pedal (7) is arranged in operator's compartment, signal wire (SW) is connected with controller (3) input end of analog signal, diesel motor (9) is arranged on rear vehicle frame (2), by throttle actuating motor (10), by bracing wire, control throttle size, control rotating speed, drive controllable capacity pump (11) and fix-displacement pump (12) to rotate, throttle actuating motor (10) adopts linear electric motors, be arranged on rear vehicle frame (2), be connected with the magnitude of current output port of controller (3), by controller (3), control and pull acceleration cable, control engine (9) rotating speed,
Controller (3) receives signal judgement current driving direction and the moving velocity expected value of forward-reverse stretcher (7), according to moving velocity expected value, determine traveling mechanism target flow, simultaneously, controller is according to the detected difference of pressure of traveling mechanism pressure sensor (4), adopt sef-adapting filter to obtain pressure trend, predict the pressure of next control cycle, by target flow and forecast pressure, calculate system power, coupling driving engine (9) horsepower curve, determine the rotating speed of target value of driving engine, according to the target flow of driving system, calculate the target discharge capacity of controllable capacity pump simultaneously, direction according to above-mentioned expected value difference control engine (9) rotating speed and controllable capacity pump (11), discharge capacity, realize the control of travelling of vehicle.
2. hydrostatic control system for multifunctional off-road forklift according to claim 1, is characterized in that, operating mechanism's operating handle (8) is arranged in operator's compartment, by CAN bus, is connected with controller (3).
3. hydrostatic control system for multifunctional off-road forklift according to claim 1, is characterized in that, it is upper that automatically controlled controllable capacity pump (11) is arranged on rear vehicle frame (2), by driving engine (9), is driven and is rotated, and controller (3) is controlled its discharge capacity, promotes traveling mechanism operation.
4. hydrostatic control system for multifunctional off-road forklift according to claim 1, is characterized in that, it is upper that operating mechanism's fix-displacement pump (12) is arranged on rear vehicle frame (2), by driving engine (9), is driven and is rotated, and mechanism's operation pushes the work forward.
5. hydrostatic control system for multifunctional off-road forklift according to claim 1, is characterized in that, electronically controlled proportional valve (13) is arranged on below, operator's compartment right side, and control signal wire is connected to the current output terminal of controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110306756.5A CN102416948B (en) | 2011-10-11 | 2011-10-11 | Hydrostatic control system for multifunctional off-road forklift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110306756.5A CN102416948B (en) | 2011-10-11 | 2011-10-11 | Hydrostatic control system for multifunctional off-road forklift |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102416948A CN102416948A (en) | 2012-04-18 |
| CN102416948B true CN102416948B (en) | 2014-08-13 |
Family
ID=45941655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110306756.5A Expired - Fee Related CN102416948B (en) | 2011-10-11 | 2011-10-11 | Hydrostatic control system for multifunctional off-road forklift |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102416948B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032184B (en) * | 2012-12-19 | 2015-09-02 | 中联重科股份有限公司 | A kind of controlling method of engine speed, equipment and system |
| CN104691538B (en) * | 2015-03-05 | 2017-09-29 | 中国人民解放军总后勤部建筑工程研究所 | A kind of hybrid electric vehicle brake energy recovering system and method based on static pressure transmission |
| CN114132314B (en) * | 2021-12-20 | 2023-09-01 | 杭叉集团股份有限公司 | Industrial vehicle turning deceleration control system and method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102152782A (en) * | 2011-03-24 | 2011-08-17 | 江苏柳工机械有限公司 | Power distribution control method and system for mobile operation machine |
| CN102182724A (en) * | 2011-03-29 | 2011-09-14 | 江苏柳工机械有限公司 | Method and system for controlling power matching of mobile working machine |
| CN102180428A (en) * | 2011-04-29 | 2011-09-14 | 中国人民解放军总后勤部建筑工程研究所 | Mini multifunctional cross-country forktruck |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003102106A (en) * | 2001-09-21 | 2003-04-04 | Hitachi Constr Mach Co Ltd | Drive control device for hybrid construction machine, hybrid construction machine and its drive control program |
-
2011
- 2011-10-11 CN CN201110306756.5A patent/CN102416948B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102152782A (en) * | 2011-03-24 | 2011-08-17 | 江苏柳工机械有限公司 | Power distribution control method and system for mobile operation machine |
| CN102182724A (en) * | 2011-03-29 | 2011-09-14 | 江苏柳工机械有限公司 | Method and system for controlling power matching of mobile working machine |
| CN102180428A (en) * | 2011-04-29 | 2011-09-14 | 中国人民解放军总后勤部建筑工程研究所 | Mini multifunctional cross-country forktruck |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2003-102106A 2003.04.04 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102416948A (en) | 2012-04-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101558243B (en) | Engine load control device of work vehicle | |
| CN105492702B (en) | Wheel loader | |
| US6359403B1 (en) | Method and apparatus for setting the rotation speed of a drive motor of a work machine | |
| JP5694769B2 (en) | CVT control system with variable power source speed | |
| CN102874087B (en) | The drivetrain of vehicle, particularly mobile operation machinery | |
| CN101341321B (en) | Engine control device for working vehicle | |
| US9845587B2 (en) | Electric drive of mobile apparatus | |
| CN102859155B (en) | The engine controlling unit of fork truck | |
| CN103688089B (en) | Work vehicle and method for controlling work vehicle | |
| CN105074280A (en) | Wheel loader | |
| CN102859240B (en) | Engine-overrun-preventing control device for work vehicle | |
| CN100567643C (en) | Tire road roller energy-saving control system | |
| WO2006064623A1 (en) | Control device for traveling working vehicle | |
| CN102205559B (en) | Device for controlling constant rotating speed of mixing cylinder of concrete mixer truck | |
| JP2012246631A5 (en) | ||
| CN103608570B (en) | Wheel loader and method for controlling wheel loader | |
| CN111836933A (en) | Drive for a working machine | |
| CN102416948B (en) | Hydrostatic control system for multifunctional off-road forklift | |
| WO2008100185A1 (en) | A method and a system for controlling an input power | |
| CN103030064A (en) | Control system and control method of engineering machinery equipment | |
| CN202320291U (en) | Hydrostatic control device for multifunctional cross-country fork-lift | |
| CN103109060B (en) | Rice transplanter | |
| US7665971B1 (en) | Method of obtaining required power on demand from an engine | |
| CN202533815U (en) | Intelligent tensioner | |
| JP2014028584A (en) | Tractor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20211011 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |