CN102644730A - Gear-shifting control method, gear-shifting control system and engineering machinery for traction work - Google Patents
Gear-shifting control method, gear-shifting control system and engineering machinery for traction work Download PDFInfo
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- CN102644730A CN102644730A CN2012101332236A CN201210133223A CN102644730A CN 102644730 A CN102644730 A CN 102644730A CN 2012101332236 A CN2012101332236 A CN 2012101332236A CN 201210133223 A CN201210133223 A CN 201210133223A CN 102644730 A CN102644730 A CN 102644730A
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Abstract
The invention discloses a gear-shifting control method, The gear-shifting control method comprises obtaining a turbine rotating speed, an engine rotating speed and a gear signal under a current accelerator state, obtaining a rotating speed ratio by calculation; comparing the rotating speed ratio with a preset lockout rotating speed ratio; locking a hydraulic torque converter when the rotating speed ratio is higher than the preset lockout rotating speed ratio; judging whether the gear signal is a neutral position signal, and maintaining the current gear if the gear signal is the neutral position signal, or else comparing the rotating speed ratio with a preset gear-shifting rotating speed ratio range; maintaining the current gear if the rotating speed ratio is within the preset gear-shifting rotating speed ratio range; unblocking the hydraulic torque converter when the rotating speed ratio is smaller than the minimum rotating speed ratio within the preset gear-shifting rotating speed ratio range, and lowering the gear when judging that the gear signal is not a lowest gear signal; and unblocking the hydraulic torque converter when the rotating speed ratio is larger than the maximum rotating speed ratio within the preset gear-shifting rotating speed ratio range, and when judging that the gear signal is not a highest gear signal, raising the gear.
Description
Technical field
The present invention relates to technical field of engineering machinery, more particularly, relate to a kind of gear-shifting control method, system and be used to the engineering machinery of the work of drawing.
Background technique
For improving the adaptive capacity of engineering machinery, in traditional engineering machinery transmission, increase fluid torque converter and carry out the hydraulic machine transmission abominable operating environment and operating mode.This hydromechanical transmission has had hydraudynamic drive and mechanically operated plurality of advantages concurrently, such as stable starting, quicken rapid etc.; Simultaneously,, can reduce the dynamic load and the vibration of transmission system, prolong the working life of transmission system, improve vehicle safety and passing ability through liquid transfer power.Usually as long as coupling rationally, both can have been avoided " stopping working " problem of motor under the mechanical transmission heavy duty.
Practice shows, even motor is not flame-out, does not also allow to work in the poor efficiency district for a long time.As under " stall " operating mode, working one minute, the working medium of hydraudynamic drive is because mechanical energy all is converted into heat energy and " overheated ".Equally, under high speed light loading, change to high retaining work, reduce the loss that causes energy owing to hydraulic losses makes transmission efficiency as untimely.
At present, mainly be to operate by driver's experiences to guarantee hydraudynamic drive in efficient district's work, because it is the operating condition of engineering machinery is complicated, work under bad environment, therefore, very high to driver's requirement.For lowering requirement, just need the electronic control self shifter to the driver.
At present, engineering machinery automatic shifting mainly is that the self shifter technology that accordings to automobile realizes.Because engineering vehicle operation operating mode is obviously different with vehicle behavior, the self shifter technology of automobile can not be adapted to engineering machinery fully.
Therefore, how realizing self shifter control, improve the working efficiency and the operation quality of the engineering machinery that is used to the work of drawing, alleviate driver's labor intensity, is those skilled in the art's problem demanding prompt solutions.
Summary of the invention
In view of this, the present invention provides a kind of gear-shifting control method, system and is used to the engineering machinery of the work of drawing, and is used to the automaitc shfit of the engineering machinery of the work of drawing with realization.
For realizing above-mentioned purpose, the existing scheme that proposes is following:
A kind of gear-shifting control method comprises:
Obtain secondary speed, engine speed and gear signal under the current throttle state;
Calculate rotating ratio, said rotating ratio is the ratio of secondary speed and engine speed;
Compare said rotating ratio and preset locking rotating ratio, said preset locking rotating ratio is corresponding with said gear signal;
When said rotating ratio is higher than said preset locking rotating ratio, locking torque converter;
Judge when said gear signal is the neutral gear signal, if keep current gear; Otherwise compare said rotating ratio and preset gear shifting rotational speed compares scope;
When said rotating ratio is in preset gear shifting rotational speed than scope, keep current gear;
When said rotating ratio less than said preset gear shifting rotational speed than the ratio of the minimum speed in the scope, release fluid torque converter, and when judging that said gear signal is not the lowest gear signal, reduce gear;
When said rotating ratio greater than said preset gear shifting rotational speed than the maximum (top) speed in the scope than the time, release fluid torque converter, and judge when said gear signal is not high tap position signal the rising gear.
Preferably, also comprise:
Compare said rotating ratio and preset release rotating ratio;
When said rotating ratio is lower than said preset release rotating ratio, the release fluid torque converter.
Preferably, also comprise:
Obtain current shift mode;
If said current shift mode is manual control mode, then said transforming gear control is realized by the manual operation Joystick; If said current shift mode is an automatic control mode, then obtain secondary speed and gear signal under the current throttle state.
Preferably, also comprise:
Obtain the gear state of a control, itself and said current shift mode are compared;
When satisfying when pre-conditioned, change said current shift mode to the identical shift mode of said gear state of a control, said pre-conditioned be that said gear state of a control and said current shift mode are inequality.
Preferably, said pre-conditionedly also comprise: it is still inequality to postpone gear state of a control and said current shift mode that Preset Time obtains.
Preferably, than then also comprise than the minimum speed in the scope less than said preset gear shifting rotational speed when said rotating ratio:
Continuously the interval Preset Time between preset times and adjacent twice obtains secondary speed, engine speed and gear signal under the current throttle state;
Calculate rotating ratio, said rotating ratio is the ratio of secondary speed and engine speed;
When judging rotating ratio that said continuous preset times obtains all less than said minimum speed ratio, said fluid torque converter is a released state, and said gear signal reduces gear when all not being the lowest gear signal.
Preferably, than then also comprise than the maximum (top) speed in the scope greater than said preset gear shifting rotational speed when said rotating ratio:
Continuously the interval Preset Time between preset times and adjacent twice obtains secondary speed, engine speed and gear signal under the current throttle state;
Calculate rotating ratio, said rotating ratio is the ratio of secondary speed and engine speed;
When judging rotating ratio that said continuous preset times obtains all greater than said maximum (top) speed ratio, said fluid torque converter is a released state, and said gear signal is not when all being high tap position signal, the rising gear.
Preferably, also comprise:
Obtain brake signal;
When said brake signal is a non-NULL, the said fluid torque converter of release, and judge when said gear signal is not the lowest gear signal, reduce gear.
A kind of shift control comprises:
The gear signal sensor is used to gather gear signal;
Turbine speed sensor is used to gather secondary speed;
Engine rotation speed sensor is used to gather engine speed;
Electronic control unit is used to obtain secondary speed, engine speed and gear signal under the current throttle state; Calculate rotating ratio, said rotating ratio is the ratio of secondary speed and engine speed; Compare said rotating ratio and preset locking rotating ratio, said preset locking rotating ratio is corresponding with said gear signal; When said rotating ratio is higher than said preset locking rotating ratio, locking torque converter; Judge when said gear signal is the neutral gear signal, if keep current gear; Otherwise compare said rotating ratio and preset gear shifting rotational speed compares scope; When said rotating ratio is in preset gear shifting rotational speed than scope, keep current gear; When said rotating ratio less than said preset gear shifting rotational speed than the ratio of the minimum speed in the scope, release fluid torque converter, and when judging that said gear signal is not the lowest gear signal, reduce gear; When said rotating ratio greater than said preset gear shifting rotational speed than the maximum (top) speed in the scope than the time, release fluid torque converter, and judge when said gear signal is not high tap position signal the rising gear.
Preferably; Also comprise: the control mode selector switch that switches manual control mode and automatic control mode; Said electronic control unit also is used to judge current shift mode, if said current shift mode is manual control mode, said control mode selector switch switches to manual mode; If said current shift mode is an automatic control mode, said control mode selector switch switches to automatic mode.
Preferably, also comprise: the brake signal acquiring unit is used to obtain brake signal; Said electronic control unit is used to also judge that said brake signal is a non-NULL, the said fluid torque converter of release, and judge when said gear signal is not the lowest gear signal, reduce gear.
A kind of engineering machinery that is used to the work of drawing comprises above-mentioned system.
Preferably, said engineering machinery is bulldozer, push-harrower, grader or loader.
Can find out that from above-mentioned technological scheme in the gear-shifting control method disclosed by the invention, when rotating ratio was higher than preset locking rotating ratio, locking torque converter had improved working efficiency; And, also confirm the current operating mode that runs into, and then carry out the automatic control of gear according to rotating ratio; Concrete, when said rotating ratio less than said preset gear shifting rotational speed than the ratio of the minimum speed in the scope, release fluid torque converter, and when judging that said gear signal is not the lowest gear signal, reduction gear; When the said preset gear shifting rotational speed of said rotating ratio than the maximum (top) speed in the scope than the time, release fluid torque converter, and judge that the rising gear had been realized the automaitc shfit of the engineering machinery of traction work when said gear signal was not high tap position signal.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technological scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart of the disclosed a kind of gear-shifting control method of the embodiment of the invention;
Fig. 2 is the flow chart of the disclosed a kind of gear-shifting control method of another embodiment of the present invention;
Fig. 3 is the structural drawing of the disclosed a kind of shift control of another embodiment of the present invention;
Fig. 4 is the structural drawing of the disclosed a kind of shift control of another embodiment of the present invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technological scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiments.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment who is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The embodiment of the invention discloses a kind of gear-shifting control method, system and be used to the engineering machinery of the work of drawing, with the automaitc shfit of the engineering machinery that realizes being used to the work of drawing.
The disclosed a kind of gear-shifting control method of present embodiment, as shown in Figure 1, comprise step:
S101, obtain secondary speed, engine speed and gear signal N under the current throttle state;
S102, calculate rotating ratio, said rotating ratio is the ratio of secondary speed and engine speed;
S103, the said rotating ratio of comparison and preset locking rotating ratio judge whether said rotating ratio is higher than said preset locking rotating ratio, and wherein, said preset locking rotating ratio is corresponding with said gear signal;
When said rotating ratio is higher than said preset locking rotating ratio, execution in step S104, locking torque converter;
S105, judge whether said gear signal N is the neutral gear signal, if, then execution in step S106, keep current gear; Otherwise execution in step S107, the said rotating ratio of comparison and preset gear shifting rotational speed compare scope;
S108, be in preset gear shifting rotational speed than scope when said rotating ratio, then execution in step S106, keep current gear;
S109, when said rotating ratio less than said preset gear shifting rotational speed than the ratio of the minimum speed in the scope, execution in step S110, release fluid torque converter;
S111, judge whether said gear signal N is the lowest gear signal;
If not, then execution in step S112, reduce gear;
S113, when said rotating ratio greater than said preset gear shifting rotational speed than the ratio of the maximum (top) speed in the scope, execution in step S114, release fluid torque converter;
S115, judge whether said gear signal N is high tap position signal;
If not, then execution in step S116, rising gear.
In the disclosed gear-shifting control method of present embodiment, when rotating ratio was higher than preset locking rotating ratio, locking torque converter had improved working efficiency; And; Also confirm the current operating mode that runs into according to the ratio of secondary speed and engine speed; And then carry out the automatic control of gear; Both guarantee working efficiency and functional reliability that vehicle drive system is higher, guaranteed the fuel economy and the driving comfort of vehicle again, significantly improved the comprehensive usability of engineering machinery.
Another embodiment of the present invention also discloses a kind of gear-shifting control method, comprises step:
S201, obtain current shift mode;
S202, judge according to said current shift mode information whether current shift mode is automatic control mode; When judgement is not automatic control mode; Explain that said current shift mode is manual control mode, then execution in step S203, by manual operation Joystick control transforming gear.
When being judged as automatic control mode, execution in step S204, obtain secondary speed, engine speed and gear signal N under the current throttle state;
S205, calculate rotating ratio, said rotating ratio is the ratio of secondary speed and engine speed;
S206, the said rotating ratio of comparison and preset locking rotating ratio judge whether said rotating ratio is higher than said preset locking rotating ratio, and wherein, said preset locking rotating ratio is corresponding with said gear signal;
When said rotating ratio is higher than said preset locking rotating ratio, execution in step S207, locking torque converter;
S208, judge when whether said gear signal N is the neutral gear signal, if, then execution in step S209, keep current gear; Otherwise execution in step S210, the said rotating ratio of comparison and preset gear shifting rotational speed compare scope;
S211, be in preset gear shifting rotational speed than scope when said rotating ratio, then execution in step S209, keep current gear;
S212, when said rotating ratio less than said preset gear shifting rotational speed than the ratio of the minimum speed in the scope, execution in step S213, release fluid torque converter;
S214, judge whether said gear signal is the lowest gear signal;
If not, then execution in step S215, reduce gear;
S216, when said rotating ratio greater than said preset gear shifting rotational speed than the ratio of the maximum (top) speed in the scope, execution in step S217, release fluid torque converter;
S218, judge whether said gear signal is high tap position signal;
If not, then execution in step S219, rising gear.
In the above-described embodiments; When obtaining current shift mode, can also obtain the gear state of a control, confirm current shift mode according to said current shift mode information; Compare said gear state of a control and current shift mode; When satisfying when pre-conditioned, change said current shift mode to the identical shift mode of said gear state of a control, the pre-conditioned of this moment is that said gear state of a control and said current gear shift are inequality.
In order to make gear shift more accurate opportunity; Above-mentioned pre-conditioned can also comprising: gear state of a control and said current shift mode that the delay Preset Time obtains are still inequality; Concrete; Be taken as 0.5s retard time to time constant arbitrarily between the 1s, also can be set at other times according to demands of different.
In two above-mentioned method embodiments, in order to confirm gear shift opportunity comparatively accurately, when judging that said rotating ratio than then also comprises less than said minimum speed:
Continuously the interval Preset Time between preset times and adjacent twice obtains secondary speed, engine speed and gear signal under the current throttle state;
Calculate rotating ratio, said rotating ratio is the ratio of secondary speed and engine speed;
When judging rotating ratio that said continuous preset times obtains all less than said minimum speed ratio, said fluid torque converter is a released state, and said gear signal reduces gear when all not being the lowest gear signal.
Concrete, obtain secondary speed, engine speed and gear signal blanking time scope can but be not defined as 0.3-0.5s, the number of times that obtains can but be not defined as 3-5.
And, when said rotating ratio than then also comprises greater than said maximum (top) speed:
Continuously the interval Preset Time between preset times and adjacent twice obtains secondary speed, engine speed and gear signal under the current throttle state;
Calculate rotating ratio, said rotating ratio is the ratio of secondary speed and engine speed;
When judging rotating ratio that said continuous preset times obtains all greater than said maximum (top) speed ratio, said fluid torque converter is a released state, and said gear signal is not when all being high tap position signal, the rising gear.
Concrete, obtain secondary speed, engine speed and gear signal blanking time scope can but be not defined as 0.5-1.0s, the number of times that obtains can but be not defined as 3-5.
In two above-mentioned embodiments, said preset gear shifting rotational speed can be one than scope, and can but do not limit the secondary speed of selecting the maximum throttle state for use and compare scope as preset gear shifting rotational speed; Certainly, said preset gear shifting rotational speed can also be for a plurality of than scope, and corresponding one by one with different throttles, at this moment, also need obtain throttle signal when obtaining said secondary speed, engine speed and gear signal.
Because the preset gear shifting rotational speed under each throttle is more inequality than scope; When throttle is higher; Preset gear shifting rotational speed is more higher than all than ratio of the maximum (top) speed in the scope and minimum speed; When throttle was low, preset gear shifting rotational speed was lower than all than ratio of the maximum (top) speed in the scope and minimum speed.Therefore, for accurate control gear shift opportunity, the signal of throttle is necessary, and, the throttle signal also with this throttle under preset gear shifting rotational speed more corresponding one by one than scope.
In order more to improve the disclosed gear controlling method of above-mentioned two embodiments of the present invention, make it not only under running state, control transforming gear, can also control transforming gear in braking state; Therefore, above-mentioned two disclosed gear-shifting control methods of embodiment can also comprise:
Obtain brake signal;
When said brake signal is a non-NULL, guarantee that said fluid torque converter is a released state, and judge when said gear signal is not the lowest gear signal, reduce gear.
Concrete, when the brake signal that obtains is non-NULL, explain that the brake petal of engineering machinery this moment is operated, the speed of engineering machinery slows down, and need gear be reduced.Judge whether gear signal is lowest gear, if not, gear then reduced.
Engineering machinery is when the traction gear engaged, and getting working efficiency η according to the operating mode shift point is the corresponding rotating ratio k of the different accelerator open degrees in 70-75% place
η-70-75%Certainly, can choose other tachometer value according to concrete operating mode shift point.
Corresponding different throttle sizes, rotating ratio is different; But for certain accelerator open degree value; η is that the corresponding rotating ratio size in 70-75% place is 2 fixing values; Promptly (η-70-75%) (η-70-75%), bigger value is a shift-up point to a bigger value Kmax, and less value is for lowering category a little with a less value Kmin.
When engineering machinery is being gone transportation gear and retreat shelves when going, being taken at working efficiency η according to the shift point of operating mode vehicle is the corresponding rotating ratio k of 75-80%
η-75-80%Certainly, can choose other tachometer value according to concrete operating mode shift point.
The same, η is that the corresponding rotating ratio size in 75-80% place is 2 fixing values, and promptly (η-75-80%) (η-75-80%), bigger value is a shift-up point to a bigger value Kmax, and less value is for lowering category a little with a less value Kmin.
Equally, in two above-mentioned embodiments, after the locking torque converter, can also be according to the change of the ratio of secondary speed and engine speed, release fluid torque converter; Concrete:
Compare said rotating ratio and preset release rotating ratio;
When said rotating ratio is lower than said preset release rotating ratio, the release fluid torque converter.
Wherein: generally on the basis of locking rotating ratio, reduce 0.1-0.2, like this, can guarantee to close the stable of releasing process as the release rotating ratio.
Equally, in order to confirm the release opportunity of closing of fluid torque converter comparatively accurately, also comprise when judging after said rotating ratio is higher than said preset locking rotating ratio:
Continuously the interval Preset Time between preset times and adjacent twice obtains secondary speed and engine speed under the current throttle state;
Calculate rotating ratio, said rotating ratio is the ratio of secondary speed and engine speed;
When judging that the rotating ratio that said continuous preset times is obtained all is higher than said preset locking rotating ratio, locking torque converter.
And, also comprise when judging after said rotating ratio is lower than preset release rotating ratio:
Continuously the interval Preset Time between preset times and adjacent twice obtains secondary speed and engine speed under the current throttle state;
Calculate rotating ratio, said rotating ratio is the ratio of secondary speed and engine speed;
When judging that the rotating ratio that said continuous preset times obtains all is lower than preset release rotating ratio, release fluid torque converter.
Concrete, obtain secondary speed blanking time scope can but be not defined as 0.3-0.5s, the number of times that obtains can but be not defined as 3-5.
Said preset locking rotating ratio can be one; Generally speaking; Being taken at the corresponding rotating speed ratio of the different accelerator open degrees in coupling point place as the locking rotating ratio, also can different locking rotating ratios being set corresponding engineering machinery different working gear, is example with the bulldozer; Bulldozer is advancing one grade when working, and locking rotating ratio 1 is taken at coupling point place rotating ratio; When bulldozer when the second gear that advances goes, the locking rotating ratio is taken at liquid and becomes maximal efficiency place rotating speed ratio; It is the corresponding high rotational speed ratio of 75-80% that the third gear of advancing and the locking rotating ratio of retreating shelves are got working efficiency η.
And the locking rotating ratio that different throttles are set down can be identical, generally choose but do not limit select the maximum throttle state for use secondary speed as the locking rotating ratio; Certainly, the locking rotating ratio can also be corresponding one by one with different throttles, at this moment, also need obtain throttle signal when obtaining said secondary speed, engine speed and gear signal, confirms and the corresponding locking rotating ratio of said throttle signal.
Equally, reduce 0.1-0.2 on the basis of locking rotating ratio just as the release rotating ratio.
Above-mentioned two disclosed fluid torque converters of embodiment close in the dislock method; Also need detect whether there is brake signal; Be the brake petal of work machine when whether being operated, when detection has brake signal, then obtain the fluid torque converter current working state; When it is blocking, then accomplish releasing process.
The disclosed a kind of shift control of another embodiment of the present invention, as shown in Figure 3, comprising:
Engine rotation speed sensor 103 is used to gather engine speed;
In the disclosed shift control of present embodiment, electronic control unit 104 comprises:
Memory module stores gear shifting rotational speed than scope and locking rotating ratio;
Acquisition module is used to obtain secondary speed, engine speed and gear signal;
Computing module is used to calculate rotating ratio, and said rotating ratio is the ratio of secondary speed and engine speed;
Comparing module is compared said rotating ratio and locking rotating ratio, and said locking rotating ratio is corresponding with said gear signal;
First judge module is used to judge whether said gear signal is the neutral gear signal;
The control signal generation module is used for when said comparing module judges that said rotating ratio is higher than said locking rotating ratio, generating the signal of locking torque converter; When said first judge module judges that said gear signal is the neutral gear signal, generate the signal that keeps current gear;
Second judge module is used for when said first judge module is judged said gear signal not for the neutral gear signal, and comparing said rotating ratio and gear shifting rotational speed compares scope;
The 3rd judge module is used to judge said gear signal whether high tap position signal or lowest gear signal;
Said control signal generation module also is used for; When said second judge module judge rotating ratio less than said gear shifting rotational speed than the ratio of the minimum speed in the scope; And said the 3rd judge module is judged when said gear signal is not the lowest gear signal; Generate the signal of release fluid torque converter, after the fluid torque converter release finished, regeneration reduced gear signal; When said second judge module judge rotating ratio greater than said gear shifting rotational speed than the ratio of the maximum (top) speed in the scope; And said the 3rd judge module is judged when said gear signal is not high tap position signal; Generate the signal of release fluid torque converter; After the fluid torque converter release finishes, regeneration rising gear signal.
At this moment, the gear shifting rotational speed of said memory module storage is one than scope, and can but do not limit the secondary speed of selecting the maximum throttle state for use and the ratio of engine speed compares scope as gear shifting rotational speed.
When the gear shifting rotational speed ratio is a plurality of; And with throttle signal one by one at once; The disclosed shift control of the foregoing description, as shown in Figure 4, except that comprising: gear signal sensor 201, turbine speed sensor 202, engine rotation speed sensor 203 and the electronic control unit 204; Also comprise: throttle signal sensor 205 is used to gather throttle signal.
And the memory module in the said electronic control unit stores the corresponding relation of gear shifting rotational speed than scope and throttle signal; Acquisition module removes need obtain secondary speed, engine speed, gear signal and throttle signal; Also need according to the throttle signal that obtains, obtain with the corresponding gear shifting rotational speed of the said throttle signal that obtains than the corresponding relation of scope and throttle signal from gear shifting rotational speed and compare scope.
The throttle signal of throttle signal sensor acquisition; The secondary speed that turbine speed sensor is gathered; The engine speed that engine rotation speed sensor is gathered, the gear signal of gear signal sensor acquisition, all the communication interface through electronic control unit inputs to electronic control unit; The acquisition module of electronic control unit obtains throttle signal, secondary speed, engine speed and gear signal; And the gear shifting rotational speed under definite current throttle state compares scope; Calculate rotating ratio; Said rotating ratio is transferred to said comparing module, said gear signal is transferred to said first judge module and the 3rd judge module; Said rotating ratio is transferred to second judge module.
Said comparing module judges that said control signal generation module generated the signal of locking torque converter when said rotating ratio was higher than said preset locking rotating ratio; Said first judge module judges whether said gear signal is the neutral gear signal; When being the neutral gear signal, said control signal generation module generates the signal that keeps current gear; When not being the neutral gear signal, second judge module compares said rotating ratio and preset gear shifting rotational speed compares scope; When said second judge module judge rotating ratio less than said preset gear shifting rotational speed than the ratio of the minimum speed in the scope; And said the 3rd judge module is judged when said gear signal is not the lowest gear signal; Said electronic control unit generates the signal of release fluid torque converter; After said fluid torque converter release finished, said electronic control unit generated and reduces gear signal; When said second judge module judge rotating ratio greater than said preset gear shifting rotational speed than the ratio of the maximum (top) speed in the scope; And said the 3rd judge module is judged when said gear signal is not high tap position signal; Said electronic control unit generates the signal of release fluid torque converter; After said fluid torque converter release finished, said electronic control unit generated the rising gear signal.
As shown in Figure 4 equally; The disclosed shift control of present embodiment can also comprise: the control mode selector switch 206 that switches manual control mode and automatic control mode; Electronic control unit 204 also is used to judge current shift mode; If said current shift mode is manual control mode, control mode selector switch 206 switches to manual mode; If said current shift mode is an automatic control mode, control mode selector switch 206 switches to automatic mode.
In order to be implemented in braking state control transforming gear, as shown in Figure 4 equally, the disclosed shift control of present embodiment also comprises: brake signal acquiring unit 207 is used to obtain brake signal;
In the shift control among above-mentioned two embodiments, electronic control unit 204 can also be realized the release of closing of fluid torque converter, and is concrete:
Second judging unit in the said electronic control unit can also be compared said rotating ratio and the preset release rotating ratio that closes;
When judging that said rotating ratio is between said locking rotating ratio and release rotating ratio, said control signal generation module generates the work at present state that signal keeps fluid torque converter; When judging that said rotating ratio is lower than the release rotating ratio, said control signal generation module generates signal release fluid torque converter.
When said locking rotating ratio is a plurality of; And with gear at once; Said memory module also stores the corresponding relation of locking rotating ratio and gear, and the acquisition module in the said electronic control unit can also obtain in the memory module and the corresponding locking rotating ratio of said gear signal.
Reduce 0.1-0.2 on the basis of locking rotating ratio just as the release rotating ratio.
System can also comprise: the control mode selector switch that switches manual control mode and automatic control mode; At this moment; The judging unit of electronic control unit also is used to judge current fluid torque converter control mode; If said current fluid torque converter control mode is manual control mode, said control mode selector switch switches to manual mode; If said current fluid torque converter control mode is an automatic mode, said control mode selector switch switches to automatic mode.
With the disclosed same content of said method embodiment, when the disclosed system of present embodiment can also accomplish neutral gear and have brake signal, the release fluid torque converter; Concrete; The gear signal sensor acquisition is after gear signal, and the acquisition module in the said electronic control unit obtains said gear signal, judges whether said gear signal is neutral gear; If during neutral gear, the control signal generation module control fluid torque converter release in the said electronic control unit.
The disclosed shift control of the foregoing description also comprises: cooling-water temperature sensor is used to gather the engine water temperature value; Said electronic control unit can also close the release fluid torque converter according to the engine water temperature value, and is concrete:
Whether the engine water temperature value of judging said cooling-water temperature sensor collection is between the minimum and peak of setting, then keeps the current running state of fluid torque converter;
If (being taken as 0.5s retard time to the time constant between the 1s) obtained the engine water temperature value more again after judgement engine water temperature value not between minimum of setting and peak, was waited for certain retard time;
Whether the engine water temperature value that rejudges new collection is between the minimum and peak of setting; When water temperature value is lower than the value of program setting, keep the fluid torque converter released state, proper extension rises the retaining time, is raised to setting range until engine water temperature; When the engine water temperature value is higher than programmed values, and liquid becomes current when being in released state, locks the release fluid torque converter in advance, drops to setting range until engine water temperature.
Another embodiment of the present invention also discloses a kind of engineering machinery that is used to the work of drawing, and this project machinery comprises the open shift control of the foregoing description.
No longer shift control is carried out detailed argumentation here, see also the disclosed content of the foregoing description.
Concrete, the disclosed engineering machinery of present embodiment specifically can be bulldozer, push-harrower, grader or loader, certainly, can also be used to the engineering machinery of the work of drawing for other.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and other embodiments' difference that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make related domain professional and technical personnel can realize or use the present invention.Multiple modification to these embodiments will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiments shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (13)
1. a gear-shifting control method is characterized in that, comprising:
Obtain secondary speed, engine speed and gear signal under the current throttle state;
Calculate rotating ratio, said rotating ratio is the ratio of secondary speed and engine speed;
Compare said rotating ratio and preset locking rotating ratio, said preset locking rotating ratio is corresponding with said gear signal;
When said rotating ratio is higher than said preset locking rotating ratio, locking torque converter;
Judge when said gear signal is the neutral gear signal, if keep current gear; Otherwise compare said rotating ratio and preset gear shifting rotational speed compares scope;
When said rotating ratio is in preset gear shifting rotational speed than scope, keep current gear;
When said rotating ratio less than said preset gear shifting rotational speed than the ratio of the minimum speed in the scope, release fluid torque converter, and when judging that said gear signal is not the lowest gear signal, reduce gear;
When said rotating ratio greater than said preset gear shifting rotational speed than the maximum (top) speed in the scope than the time, release fluid torque converter, and judge when said gear signal is not high tap position signal the rising gear.
2. method according to claim 1 is characterized in that, also comprises:
Compare said rotating ratio and preset release rotating ratio;
When said rotating ratio is lower than said preset release rotating ratio, the release fluid torque converter.
3. method according to claim 1 is characterized in that, also comprises:
Obtain current shift mode;
If said current shift mode is manual control mode, then said transforming gear control is realized by the manual operation Joystick; If said current shift mode is an automatic control mode, then obtain secondary speed and gear signal under the current throttle state.
4. method according to claim 3 is characterized in that, also comprises:
Obtain the gear state of a control, itself and said current shift mode are compared;
When satisfying when pre-conditioned, change said current shift mode to the identical shift mode of said gear state of a control, said pre-conditioned be that said gear state of a control and said current shift mode are inequality.
5. method according to claim 4 is characterized in that, said pre-conditionedly also comprise: it is still inequality to postpone gear state of a control and said current shift mode that Preset Time obtains.
6. according to any described method among the claim 1-5, it is characterized in that, when said rotating ratio than then also comprises than the minimum speed in the scope less than said preset gear shifting rotational speed:
Continuously the interval Preset Time between preset times and adjacent twice obtains secondary speed, engine speed and gear signal under the current throttle state;
Calculate rotating ratio, said rotating ratio is the ratio of secondary speed and engine speed;
When judging rotating ratio that said continuous preset times obtains all less than said minimum speed ratio, said fluid torque converter is a released state, and said gear signal reduces gear when all not being the lowest gear signal.
7. according to any described method among the claim 1-5, it is characterized in that, when said rotating ratio than then also comprises than the maximum (top) speed in the scope greater than said preset gear shifting rotational speed:
Continuously the interval Preset Time between preset times and adjacent twice obtains secondary speed, engine speed and gear signal under the current throttle state;
Calculate rotating ratio, said rotating ratio is the ratio of secondary speed and engine speed;
When judging rotating ratio that said continuous preset times obtains all greater than said maximum (top) speed ratio, said fluid torque converter is a released state, and said gear signal is not when all being high tap position signal, the rising gear.
8. according to any described method among the claim 1-5, it is characterized in that, also comprise:
Obtain brake signal;
When said brake signal is a non-NULL, the said fluid torque converter of release, and judge when said gear signal is not the lowest gear signal, reduce gear.
9. a shift control is characterized in that, comprising:
The gear signal sensor is used to gather gear signal;
Turbine speed sensor is used to gather secondary speed;
Engine rotation speed sensor is used to gather engine speed;
Electronic control unit is used to obtain secondary speed, engine speed and gear signal under the current throttle state; Calculate rotating ratio, said rotating ratio is the ratio of secondary speed and engine speed; Compare said rotating ratio and preset locking rotating ratio, said preset locking rotating ratio is corresponding with said gear signal; When said rotating ratio is higher than said preset locking rotating ratio, locking torque converter; Judge when said gear signal is the neutral gear signal, if keep current gear; Otherwise compare said rotating ratio and preset gear shifting rotational speed compares scope; When said rotating ratio is in preset gear shifting rotational speed than scope, keep current gear; When said rotating ratio less than said preset gear shifting rotational speed than the ratio of the minimum speed in the scope, release fluid torque converter, and when judging that said gear signal is not the lowest gear signal, reduce gear; When said rotating ratio greater than said preset gear shifting rotational speed than the maximum (top) speed in the scope than the time, release fluid torque converter, and judge when said gear signal is not high tap position signal the rising gear.
10. system according to claim 9; It is characterized in that; Also comprise: the control mode selector switch that switches manual control mode and automatic control mode; Said electronic control unit also is used to judge current shift mode, if said current shift mode is manual control mode, said control mode selector switch switches to manual mode; If said current shift mode is an automatic control mode, said control mode selector switch switches to automatic mode.
11. system according to claim 9 is characterized in that, also comprises: the brake signal acquiring unit is used to obtain brake signal; Said electronic control unit is used to also judge that said brake signal is a non-NULL, the said fluid torque converter of release, and judge when said gear signal is not the lowest gear signal, reduce gear.
12. an engineering machinery that is used to the work of drawing is characterized in that, comprises any described system like claim 9-11.
13. engineering machinery according to claim 12 is characterized in that, said engineering machinery is bulldozer, push-harrower, grader or loader.
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| CN106195255A (en) * | 2016-07-06 | 2016-12-07 | 厦门大学 | Automatic catch wheel loader fluid torque-converter control method |
| CN106545647A (en) * | 2016-03-07 | 2017-03-29 | 徐工集团工程机械有限公司 | A kind of engineering machinery hydraulic power velocity stagess system and control method |
| CN111649112A (en) * | 2020-08-04 | 2020-09-11 | 盛瑞传动股份有限公司 | Control method of hydraulic torque converter under emergency brake working condition |
| CN113446396A (en) * | 2021-09-02 | 2021-09-28 | 盛瑞传动股份有限公司 | Gear shifting control method, gear shifting control device and storage medium |
| CN113958702A (en) * | 2021-08-30 | 2022-01-21 | 中国北方车辆研究所 | Clutch oil charge self-adaptive control method and system in AT automatic transmission gear-up process |
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| CN111649112B (en) * | 2020-08-04 | 2020-12-22 | 盛瑞传动股份有限公司 | Control method of hydraulic torque converter under emergency brake working condition |
| CN113958702A (en) * | 2021-08-30 | 2022-01-21 | 中国北方车辆研究所 | Clutch oil charge self-adaptive control method and system in AT automatic transmission gear-up process |
| CN113446396A (en) * | 2021-09-02 | 2021-09-28 | 盛瑞传动股份有限公司 | Gear shifting control method, gear shifting control device and storage medium |
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