CN101117114A - Method for limiting hydraulic brake with the maximum invoked break power - Google Patents
Method for limiting hydraulic brake with the maximum invoked break power Download PDFInfo
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- CN101117114A CN101117114A CNA2007101383947A CN200710138394A CN101117114A CN 101117114 A CN101117114 A CN 101117114A CN A2007101383947 A CNA2007101383947 A CN A2007101383947A CN 200710138394 A CN200710138394 A CN 200710138394A CN 101117114 A CN101117114 A CN 101117114A
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- temperature
- predetermined
- described adjusting
- target temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T10/00—Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope
- B60T10/02—Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope with hydrodynamic brake
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/04—Arrangements of piping, valves in the piping, e.g. cut-off valves, couplings or air hoses
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D57/00—Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders
Abstract
The invention relates to a method for limiting the maximum adjustable braking power in a hydrodynamic brake of the vehicle. The heat generated by the hydrodynamic brake is discharged through the coolant in an engine cooling circulation return of the vehicle. The coolant is recycled in the engine cooling circulation return by a coolant pump drived by the engine of the vehicle. The method comprises following steps: presetting an adjustment interference temperature; presetting an adjustment target temperature; detecting the coolant temperature continuously or in a time interval; reducing the maximum adjustable braking power with the preset gradient if the coolant temperature ascends to the adjustment interference temperature or exceeds the adjustment interference temperature. The reduced gradient lies on the difference between the adjustment target temperature and the adjustment interference temperature. The adjustment interference temperature and the adjustment target temperature are preset based on the rotation speed of the engine of the vehicle.
Description
Technical field
The present invention relates to the method for the maximum adjustable of two kinds of hydraulic brakes that are used for restricting vehicle with B.P., if derive by the cooling system conditioner in the automotive engine cooling circuit by the heat that hydraulic brake produces, and this cooling system conditioner circulates in the engine cooling circulation loop by the cooling medium pump by the automobile drive motor.
Background technology
Hydraulic brake also is hydrodynamic retarder, because liquid friction produces heat, this heat must be discharged from hydraulic brake, so that hydraulic brake can not sustain damage in running under braking.In automobile, heat discharged in this hydraulic brake and undertaken by the engine cooling circulation loop usually, be cooling system conditioner in the engine cooling circulation loop or the working medium that directly is used as hydraulic brake, perhaps be used for by H Exch, be generally the working medium that liquid-liquid heat exchanger comes the refrigerant fluid power brake.
Because automobile driver may move automobile with the operation scheme that has made up various unfavorable running state, in of the danger of the maximum adjustable that can not control hydraulic brake fully reliably with existence damage under the situation of B.P..Therefore, some chaufeur for example before signal lamp, is inserted change-speed box neutral position or holdback clutch on the highway section of slowing down a little, then with the highest retrostage operation hydraulic brake.The highest retrostage means, the maximum adjustable B.P. of the control setup regulator solution power brake of driver requested regulator solution power brake B.P..Yet owing to the disengagement clutch of carrying out in advance produces low engine speed, i.e. idling speed, the cooling medium pump that makes circulation in the engine cooling circulation loop pump cooling system conditioner also only is driven with low rotating speed.Therefore, few by the cooling system conditioner through-current capacity of cooling medium pump, reduce by the automobile radiators rejected heat.Because the B.P. that requires maximum adjustable to use, this produces to combine with maximum heat in the hydraulic brake and causes coolant temperature to rise very apace.
If coolant temperature only monitors by a temperature sensor or a plurality of same temperature sensor, and when reaching ceiling temperature (this ceiling temperature be called now regulate intervene temperature), maximum can be reduced by the B.P. that hydraulic brake calls, so that reduce the heat that enters into cooling system conditioner by hydraulic brake, then very the fast speed temperature build-up causes temperature upper punch in the engine cooling circulation loop, this brings the danger of hypertonia, and this danger may cause placing the cooling system conditioner compensating tank under limiting case at least in theory in the engine cooling circulation loop.
Therefore in European patent document EP 0699144B1, propose, limit the maximum available B.P. of hydraulic brake according to engine speed.For this reason, directly about the curve of engine speed, wherein engine speed detects by an engine speed sensor the maximum available B.P. of predetermined hydraulic brake.Maximum available B.P. is plotted in the control unit about the curve of engine speed, and this control unit is correspondingly controlled hydraulic brake according to engine speed.
Although this patent documentation proposes, embodiment according to a kind of change, the additional consideration Engine Coolant Temperature is controlled the maximum available B.P. of hydraulic brake, its mode is, the control curve of having stored is shifted downwards when cooling water temperature is high, upward displacement when cooling water temperature is low, this is the B.P. that allows directly is used to limit maximum available B.P. about the curve of engine speed a principle.But show that in fact maximum available B.P. must be very conservatively predetermined about the curve of engine speed, under any circumstance overheated to avoid cooling system conditioner.But undesirably limited the availability of hydraulic brake thus.
Document DE 19716922A1 has put down in writing the method for the B.P. that a kind of maximum adjustable that is used for the restricting vehicle hydraulic brake uses, and this method has the feature of summarizing in the part as chatting before claim 1 and claim 7.In addition, document DE 19716919A1 has put down in writing a kind of method and a kind of device of the B.P. that is used for utilizing hydrodynamic retarder maximumly, in this hydrodynamic retarder, drive between driving engine and the change-speed box or the clutch state that is arranged on the gear shift sleeve in this change-speed box detects in car transmissions, being arranged on automobile, perhaps change-speed box is transformed into neutral position and detects.
Summary of the invention
The objective of the invention is to, the described method of specification sheets the beginning part is improved, thereby the availability of raising hydraulic brake can not increase the too high risk of engine cooling circulation loop temperature simultaneously.
The object of the invention is achieved by two kinds of methods respectively.Improve technical scheme and described the configuration favourable and that meet purpose especially of correlation method.
According to the present invention, the method of the B.P. that a kind of maximum adjustable that is used for the hydraulic brake of restricting vehicle uses is proposed, wherein, discharge by the cooling system conditioner in the engine cooling circulation loop of automobile driving driving engine by the heat that described hydraulic brake produces, described cooling system conditioner circulates in described engine cooling circulation loop by driven engine-driven cooling medium pump by described automobile, has following steps: temperature is intervened in predetermined adjusting; Predetermined adjusting target temperature; Continuously or detect the temperature of described cooling system conditioner by time gap; Intervene temperature or surpass described adjusting and intervene temperature if the temperature of described cooling system conditioner rises to described adjusting, the B.P. that the maximum adjustable of described hydraulic brake is used reduces with predetermined gradient; The described gradient that reduces depends on that described adjusting target temperature and described adjusting intervene poor between the temperature; Wherein, described adjusting intervention temperature still is that described adjusting target temperature all comes predetermined according to the rotating speed of described automobile driving driving engine.
According to the present invention, the method of the B.P. that a kind of maximum adjustable that is used for the hydraulic brake of restricting vehicle uses is also proposed, wherein, discharge by the cooling system conditioner in the engine cooling circulation loop of automobile driving driving engine by the heat that described hydraulic brake produces, described cooling system conditioner circulates in described engine cooling circulation loop by driven engine-driven cooling medium pump by described automobile, has following steps: temperature is intervened in predetermined adjusting; Predetermined adjusting target temperature; Continuously or detect the temperature of described cooling system conditioner by time gap; Intervene temperature or surpass described adjusting and intervene temperature if the temperature of described cooling system conditioner rises to described adjusting, the B.P. that the maximum adjustable of described hydraulic brake is used reduces with predetermined gradient; The described gradient that reduces depends on that described adjusting target temperature and described adjusting intervene poor between the temperature; Wherein, detect and in the automobile transfer system, to be arranged on described automobile and to drive between driving engine and the change-speed box or the clutch state or the change-speed box that are arranged on the gear shift sleeve in the change-speed box is transformed into neutral position; Predetermined described adjusting is intervened temperature and described adjusting target temperature and is being detected that power-transfer clutch is opened or the time curve of change-speed box after being transformed into neutral position.
The inventive method is used to limit the B.P. that the maximum adjustable of hydraulic brake is used.The B.P. of hydraulic brake for example calls in the following way, i.e. corresponding brake-applying handle of driver's operation or regulate certain retrostage.According to this operation or the adjusting that detect by controller, this controller is for example controlled hydraulic brake like this by a controller air system, make certain working medium amount in the regulator solution power brake epitrochoidal chamber, it causes producing the B.P. of hope, particularly predetermined lock torque.
The adjusting of the B.P. of wishing or the adjusting by the predetermined lock torque of chaufeur or control setup caused in hydraulic brake, correspondingly produce heat, wherein heat indirectly or directly must be discharged by the engine cooling circulation loop, directly the mode of discharging is a cooling system conditioner in the engine cooling circulation loop for the working medium of hydraulic brake simultaneously for example.If drive owing to make the cooling system conditioner a small amount of cocurrent flow of coolant circulating pump and cooling medium pump in the engine cooling circulation loop drive driving engine by automobile, when regulating by chaufeur or the desired B.P. of controller, there is the danger of unallowed temperature build-up, brake request just can not realized fully so, but the B.P. that the maximum adjustable of hydraulic brake is used is a upper limit.As long as the B.P. that is specifically called by chaufeur or controller is under the described boundary, just can be completely achieved requirement.If but the B.P. that specifically calls surpasses the boundary that sets, can only regulate the maximum B.P. that allows so.
Now if, controller calls B.P., this for example can be such situation so: automatic control device determines that based on motoring condition or running section landform certain, that detected hydraulic brake is favourable.This hydraulic brake starts automatically so, and need not chaufeur initiatively.
According to first method of the present invention, predetermined two temperature or temperature curve are promptly regulated intervention temperature T 1 and an adjusting target temperature T2 for one.Two temperature are predetermined according to the speed dynamic ground that automobile drives driving engine.Wherein this dependence can be direct or indirect.Particularly these two temperature are stored in the controller with the form of figure line or form, and this figure line or form will be regulated and intervene temperature T 1 and regulate the directly corresponding engine speed of the automobile driving in predetermined range of speed of giving of target temperature T2." dynamically " is predetermined then to be, the relevant temperature when obtaining at concrete engine speed by this figure line or form during the automotive operation also is used for regulating the B.P. that maximum adjustable is used.
Usually, it is different with the value of regulating target temperature T2 that temperature T 1 is intervened in adjusting.
The method according to this invention, continuously or with predetermined, particularly regular time gap come the temperature of the cooling system conditioner in the detection of engine cooling circuit and with this temperature the adjusting during at least with the present engine rotating speed intervene temperature T 1 or relevant therewith parameter is compared.Regulate to intervene temperature T 1 if the coolant temperature that is detected rises to always, the B.P. used of the maximum adjustable of hydraulic brake reduces with predetermined gradient so, and its target is to be no more than and to regulate target temperature T2 or only surpass a predetermined amount.
Reduce gradient according to regulating target temperature T2 and regulating the difference of intervening between the temperature T 1 and come predetermined.Particularly, B.P. reduces gradient and regulates target temperature T2 and regulate the difference of intervening between the temperature T 1 to be inversely proportional to, that is to say, when this difference is big gradient less and should difference hour gradient was bigger.
Be interpreted as for the gradient under the meaning of the present invention that B.P. great-jump-forward ground reduces a predetermined absolute or relative amount or B.P. reduces on the predetermined time period continuously along an inclined-plane or a curve with predetermined slope or trend.Bigger gradient means that B.P. reduces greatly and/or very fast.
Come predetermined gradient to cause following result according to regulating the difference of intervening temperature T 1 and regulating between the target temperature T2, when adjusting target temperature T2 quilt is predetermined significantly, when promptly being positioned on the adjusting intervention temperature T 1 with bigger distance, the B.P. that maximum adjustable is used always reduces not too soon and/or is not too strong.On the contrary, if should be poor little, promptly regulate target temperature T2 and only be positioned at little distance and regulate intervene on the temperature T 1, the B.P. used of maximum adjustable reduces very fast and/or strongerly so, with restriction or avoid the actual temperature of cooling system conditioner to cross and regulate target temperature T2 upper punch.
First embodiment of this method according to the present invention is regulated and is intervened temperature T 1 and still regulate rotating speed that target temperature T2 drives driving engine according to automobile and come predeterminedly, for example has along with rotating speed increases the trend that rises or descend.
Therefore, different with the described prior art of specification sheets the beginning part, be not predetermined maximum adjustable with B.P. or maximum adjustable with the curve of lock torque about engine speed, but the setting range of coolant temperature is described by predetermined two temperature values, this setting range moves according to engine speed, particularly moves towards the higher temperature direction along with engine speed increases specifically.
Otherwise this means, under the low situation of engine speed when coolant temperature is low the lock torque of hydraulic brake just reduce, reliably prevent the hypertonia in the coolant system thus.
Regulating intervention temperature T 1 and/or adjusting target temperature T2 can come predetermined with the form that has the straight line of positive slope about automobile driving engine speed respectively.Wherein can carry out the predetermined of this straight line at whole range of speed, automobile drives driving engine and works in this range of speed, and promptly this range of speed drives the idling speed of driving engine up to maximum speed of revolution from automobile.
According to a particularly advantageous embodiment, the setting range (wherein regulating the intervention temperature is lower limit, and the adjusting target temperature is the upper limit) that is limited by two predetermined values of temperature can predeterminedly must drive the width that engine speed has variation about automobile.For example, it is narrow when this width is can the ratio engine rotating speed when engine speed is high low, that is to say, when separately straight line of predetermined two temperature, the slope of the straight line of the slope ratio adjusting target temperature of the straight line of adjusting intervention temperature is big, and wherein two straight lines rise towards higher engine speed from low engine speed.
According to second method of the present invention, adjusting is intervened temperature T 1 and regulated target temperature T2 is not next predetermined according to the rotating speed of automobile driving driving engine, but come predetermined with a time curve, wherein as being used for along the firing event of predetermined time curve guiding temperature, consider the clutch state of the gear shift sleeve in the automotive transmission, for example this incident: Automotive transmission is switched to neutral position.For this reason, detect or change-speed box is transformed into neutral position and detect in transmission system, being arranged on the clutch state that drives the gear shift sleeve between driving engine and the change-speed box.If an incident in two incidents takes place, that is to say, if chaufeur holdback clutch or change-speed box be transformed into neutral position, regulate so to intervene temperature T 1 and regulate target temperature T2 and change according to predetermined time curve.
Usually, no matter regulate and intervene temperature T 1 and still regulate target temperature T2, all reduces afterwards recording firing event (being that throw-out-of clutch or change-speed box are transformed into neutral position), perhaps great-jump-forward ground or continuously, particularly reduction linearly.Described reduction is advantageously carried out after the expiration in the delay time of presetting, promptly regulate to intervene temperature T 1 and regulate target temperature T2 and after recording firing event, at first on a predetermined time period, keep invariable, after this predetermined time period passes, just change, particularly reduce.Making this delay time can be when " normally " gear shift, change-speed box avoids hydraulic brake unnecessarily to be regulated when one grade is transformed into another grade.
Description of drawings
Contrast accompanying drawing illustration the present invention below.
Shown in the figure:
The engine cooling circulation loop of Fig. 1 automobile has the hydraulic brake that is placed in wherein, and the B.P. that the maximum adjustable of this hydraulic brake is used can be regulated according to the present invention;
Fig. 2 regulates and intervenes temperature T 1 and regulate predetermined first example of target temperature T2 about the curve of the rotation speed n of automobile driving driving engine;
Fig. 3 regulates and intervenes temperature T 1 and regulate predetermined second embodiment of target temperature T2 about the curve of the rotation speed n of automobile driving driving engine;
Fig. 4 regulates and intervenes temperature T 1 and regulate predetermined three embodiment of target temperature T2 about the curve of the rotation speed n of automobile driving driving engine;
Fig. 5 regulates and intervenes temperature T 1 and regulate predetermined four embodiment of target temperature T2 about the curve of the rotation speed n of automobile driving driving engine;
Fig. 6 regulates and intervenes temperature T 1 and regulate target temperature T2 at the predetermined embodiment that detects throw-out-of clutch or the change-speed box time curve after being transformed into neutral position.
The specific embodiment
Can see the scheme drawing of the engine cooling circulation loop 2 of automobile among Fig. 1.In this engine cooling circulation loop 2, cooling system conditioner circulates in the loop by cooling medium pump 4, and wherein this loop in this automobile radiators, is discharged to surrounding environment by the cooling system conditioner absorbed heat through automobile radiators 5 (liquid-gas-heat exchanger).In addition, cooling system conditioner also flows through automobile and drives driving engine 3, cool off so that this automobile is driven driving engine, and this cooling system conditioner is arranged on the working medium of the hydraulic brake 1 in the engine cooling circulation loop 2.
Different parts being arranged among Fig. 1 in engine cooling circulation loop 2 is elective, can carry out different designs.
Can see diagram of curves among Fig. 2 to 5, they just make two temperature curves directly drive the rotation speed n of driving engine corresponding to automobile.These two temperature curves are respectively the form of the straight line with constant-slope in the range of speed that drives the driving engine operation.The corresponding rotating speeds scope is from idling speed n
MinExtend to maximum allow or possible rotation speed n always
Max
These predetermined temperature curves are formed by regulating curve of intervening temperature T 1 and the curve of regulating target temperature T2.Article two, the current quilt of curve is predetermined continuously and do not have a transition point.For coming predetermined scheme alternatively or additionally by the curve of having stored, can for example equation of straight line or form come predetermined by mathematical function.Particularly advantageously be, in the corresponding predetermined or corresponding external memory storage that is stored in controller or its memory device or controller access thereon.
Predetermined according to Fig. 2 regulated and intervenes temperature T 1 and regulate poor Δ T between the target temperature T2 on whole predetermined scope, particularly from the idling speed n of automobile driving driving engine
MinUp to maximum speed n
MaxAll be constant, because two straight lines have identical slope.
According to Fig. 3, regulate target temperature T2 and have the big positive slope of straight line of intervening temperature T 1 than regulating about the straight line that automobile drives the rotation speed n of driving engine.Therefore, the poor Δ T between two temperature is at idling speed n
MinMinimum (the Δ T in place
Min), the poor Δ T between opposite two temperature is at maximum speed n
MaxScope in maximum (Δ T
Max).
According to Fig. 4, regulate target temperature T2 and have the little positive slope of straight line of intervening temperature T 1 than regulating about the straight line that automobile drives the rotation speed n of driving engine.Therefore, the poor Δ T between two temperature is at idling speed n
MinMaximum (the Δ T in place
Max), the poor Δ T between opposite two temperature is at maximum speed n
MaxScope in minimum (Δ
Min).
According to Fig. 5, regulate the straight line level of target temperature T2, it is invariable about the rotation speed n that automobile drives driving engine promptly to regulate target temperature T2.Intervene temperature T 1 from idling speed n and regulate
MinUntil maximum speed n
MaxThe linear rising, thus difference Δ T is at idling speed n
MinMaximum again (the Δ T in place
Max), at maximum speed n
MaxMinimum (the Δ T in place
Min).
According to Fig. 6, regulate to intervene temperature T 1 and regulate target temperature T2 on time curve at time point t
0Begin to illustrate.Time point t
0Be to detect throw-out-of clutch, promptly be arranged on that time point that the gear shift sleeve in the transmission system is opened, or be to detect that time point that change-speed box is transformed into neutral position in the automobile with automatic transmission with hydraulic torque converter or automation shift transmission, decline at this neutral position and file.Two temperature T 1, T2 puts t in time
0The beginning at first through a predetermined time period up to time point t
1Keep invariable.From time point t
1Rise, regulate intervention temperature T 1 and still regulate all linear reduction of target temperature T2, up to time point t
2, at time point t
2Two temperature reach its minimum value respectively, from this moment two temperature remain on this minimum value.
Different with (in Fig. 6 difference Δ T invariable in whole time curve) shown in Figure 6, difference Δ T can change in time curve, for example becomes big or diminishes, shown in Fig. 3 to 5.
(for example can the call) lock torque that the maximum adjustable of hydraulic brake is used or following the carrying out of adjusting of maximum brake power:, then come to regulate desired lock torque of chaufeur (or controller) or B.P. by this hydraulic brake by correspondingly filling hydraulic brake working medium as long as measured coolant temperature is in the cooresponding adjusting of this rotation speed n and intervenes under the temperature T 1 when automobile drives the predetermined transient speed n of driving engine by chaufeur.On the contrary, if temperature T 1 is intervened in the adjusting when measured coolant temperature meets or exceeds in this rotation speed n when automobile drives certain rotation speed n of driving engine, the B.P. that lock torque that the maximum adjustable of hydrodynamic retarder uses or maximum adjustable are used reduces.This for example means, if the maximum braking moment that driver requested hydrodynamic retarder can bear based on its make and when regulating this desired B.P., produce corresponding too high coolant temperature, this coolant temperature meets or exceeds to regulate intervenes temperature T 1, although there is chaufeur institute requirement, the lock torque or the corresponding B.P. that are produced by hydraulic brake are reduced, be brought into heat the cooling system conditioner thereby reduce from hydraulic brake.
Lock torque or B.P. reduce with predetermined gradient.For example this gradient is big more, and the difference of regulating between target temperature T2 and the adjusting intervention temperature T 1 is just more little.
Advantageously regulate between intervention period also to the actual temperature of cooling system conditioner proceed to detect and with according to the engine speed n of reality or time curve t predetermined adjusting intervene temperature T 1 and compare.Intervene temperature T 1 as long as measured coolant temperature equals regulate to intervene temperature T 1 or is higher than to regulate, the B.P. used of the lock torque used of the maximum adjustable of hydraulic brake or maximum adjustable is just to reduce according to the gradient that difference was produced between two temperature so.
Intervention temperature T 1 ratio when automobile driving engine speed is low is low when rotating speed is high owing to regulating, although so for example since upper punch when making low rotation speed n coolant temperature may fast rise surpass to regulate and intervene temperature T 1, still can avoid surpassing for security reasons maximum coolant temperature that allows reliably, the coolant temperature that this maximum allows for example is positioned on the bare maximum of regulating target temperature T2 with predetermined distance.This maximum coolant temperature that allows is shown in broken lines and indicate mark T in Fig. 2
MaxAs can be seen, even drive the maximum speed n of driving engine at automobile
MaxScope in still can make coolant temperature transfer to surpass regulate target temperature T
2Long a little dashing, and temperature T
MaxCan not be exceeded.
Claims (14)
1. the method that is used for the B.P. that the maximum adjustable of the hydraulic brake (1) of restricting vehicle uses, wherein, the cooling system conditioner that the heat that is produced by described hydraulic brake (1) drives by automobile in the engine cooling circulation loop (2) of driving engine (3) is discharged, described cooling system conditioner circulates in described engine cooling circulation loop (2) by the cooling medium pump (4) that is driven driving engine (3) driving by described automobile, has following steps:
1.1 temperature (T1) is intervened in predetermined adjusting;
1.2 predetermined adjusting target temperature (T2);
1.3 continuously or detect the temperature of described cooling system conditioner by time gap;
If intervene temperature (T1) or surpass described adjusting and intervene temperature (T1) 1.4 the temperature of described cooling system conditioner rises to described adjusting, the B.P. that the maximum adjustable of described hydraulic brake (1) is used reduces with predetermined gradient;
1.5 the described gradient that reduces depends on that described adjusting target temperature (T2) and described adjusting intervene poor between the temperature (T1);
It is characterized in that,
Still described adjusting target temperature (T2) is all next predetermined according to the rotating speed (n) of described automobile driving driving engine (3) 1.6 temperature (T1) is intervened in described adjusting.
2. the method for claim 1 is characterized in that, the difference that gradient that described B.P. reduces and described adjusting target temperature (T2) and described adjusting are intervened between the temperature (T1) is predetermined inversely.
3. as the described method in one of claim 1 or 2, it is characterized in that, the difference that described adjusting target temperature (T2) and described adjusting are intervened between the temperature (T1) changes about described speed curves, and particularly the rotating speed (n) that drives driving engine (3) along with described automobile raises or reduces and become greatly.
4. as the described method of one of claim 1 to 3, it is characterized in that, temperature (T1) and described adjusting target temperature (T2) are intervened in described adjusting, and to have the form of straight line of positive slope with the rotating speed (n) that drives driving engine (3) about described automobile respectively predetermined, particularly on the whole range of speed that reaches that can be in operation by described automobile driving driving engine (3).
5. method as claimed in claim 4 is characterized in that, the straight line of described adjusting intervention temperature (T1) has bigger slope or less slope than the straight line of described adjusting target temperature (T2).
6. as the described method of one of claim 1 to 3, it is characterized in that described adjusting target temperature (T2) is predetermined invariablely about described speed curves.
7. the method that is used for the B.P. that the maximum adjustable of the hydraulic brake (1) of restricting vehicle uses, wherein, the cooling system conditioner that the heat that is produced by described hydraulic brake (1) drives by automobile in the engine cooling circulation loop (2) of driving engine (3) is discharged, described cooling system conditioner circulates in described engine cooling circulation loop (2) by the cooling medium pump (4) that is driven driving engine (3) driving by described automobile, has following steps:
7.1 temperature (T1) is intervened in predetermined adjusting;
7.2 predetermined adjusting target temperature (T2);
7.3 continuously or detect the temperature of described cooling system conditioner by time gap;
If intervene temperature (T1) or surpass described adjusting and intervene temperature (T1) 7.4 the temperature of described cooling system conditioner rises to described adjusting, the B.P. that the maximum adjustable of described hydraulic brake (1) is used reduces with predetermined gradient;
7.5 the described gradient that reduces depends on that described adjusting target temperature (T2) and described adjusting intervene poor between the temperature (T1);
It is characterized in that,
7.6 detect and in the automobile transfer system, to be arranged on described automobile and to drive between driving engine (3) and the change-speed box or the clutch state or the change-speed box that are arranged on the gear shift sleeve in the change-speed box is transformed into neutral position;
7.7 intervening temperature (T1) and described adjusting target temperature (T2), predetermined described adjusting detecting that power-transfer clutch is opened or the time curve of change-speed box after being transformed into neutral position.
8. method as claimed in claim 7 is characterized in that, the difference that gradient that described B.P. reduces and described adjusting target temperature (T2) and described adjusting are intervened between the temperature (T1) is predetermined inversely.
9. as claim 7 or 8 described methods, it is characterized in that the difference that described adjusting target temperature (T2) and described adjusting are intervened between the temperature (T1) changes about described time curve, particularly become greatly or diminish along with the time progress.
10. as the described method of one of claim 7 to 9, it is characterized in that it is predetermined with the form about the straight line with negative slope of described time curve respectively that temperature (T1) and described adjusting target temperature (T2) are intervened in described adjusting.
11. method as claimed in claim 10 is characterized in that, the straight line of described adjusting intervention temperature (T1) has little slope amount than the straight line of described adjusting target temperature (T2).
12., it is characterized in that the difference that described adjusting is intervened between temperature (T1) and the described adjusting target temperature (T2) is predetermined invariablely as claim 7,8,10 or 11 described methods.
13., it is characterized in that temperature (T1) is intervened in described adjusting and/or described adjusting target temperature (T2) at first keeps invariable on time curve, and then diminishes as the described method of one of claim 7 to 12, particularly linearity reduces.
14., it is characterized in that described hydraulic brake (1) moves as working medium with the cooling system conditioner of described engine cooling circulation loop (2) as the described method of one of claim 1 to 13.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200610036185 DE102006036185B3 (en) | 2006-08-01 | 2006-08-01 | Vehicle braking method for limiting maximum recallable braking power in a motor vehicle's hydrodynamic brake carries off heat in the brake via a coolant in an engine's cooling circuit |
| DE102006036185.7 | 2006-08-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101117114A true CN101117114A (en) | 2008-02-06 |
| CN101117114B CN101117114B (en) | 2011-06-29 |
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ID=38622526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101383947A Expired - Fee Related CN101117114B (en) | 2006-08-01 | 2007-08-01 | Method for limiting hydraulic brake with the maximum invoked break power |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN101117114B (en) |
| BR (1) | BRPI0703134A2 (en) |
| DE (1) | DE102006036185B3 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102472332A (en) * | 2009-08-13 | 2012-05-23 | 沃依特专利有限责任公司 | Method for controlling power transmission of hydrodynamic retarder |
| CN102947146A (en) * | 2010-03-03 | 2013-02-27 | 沃依特专利有限责任公司 | Hydrodynamic retarder and method for operating a hydrodynamic retarder |
| CN104773151A (en) * | 2015-03-17 | 2015-07-15 | 吉林大学 | Method and device for automatically acquiring liquid filling ratio of hydrodynamic retarder |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010018805B4 (en) | 2010-04-29 | 2012-05-31 | Voith Patent Gmbh | Method for limiting the maximum retrievable braking power of a hydrodynamic brake |
| DE102010047076B4 (en) | 2010-10-01 | 2012-05-24 | Voith Patent Gmbh | Method for limiting the maximum retrievable braking power of a hydrodynamic brake |
| DE102011107288A1 (en) | 2011-07-06 | 2013-01-10 | Voith Patent Gmbh | Method for limiting the maximum retrievable braking power of a hydrodynamic retarder |
| DE102012020937B3 (en) * | 2012-10-25 | 2013-11-14 | Voith Patent Gmbh | Method for limiting the maximum braking torque of a hydrodynamic retarder and hydrodynamic retarder for a motor vehicle |
| DE102013001562B3 (en) * | 2013-01-30 | 2014-10-30 | Voith Patent Gmbh | Method for limiting the maximum retrievable braking power of a hydrodynamic brake |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0699144B1 (en) * | 1993-05-28 | 1999-08-11 | Scania Cv Aktiebolag | Process and control system for limiting the braking effect which may be utilised from a hydrodynamic auxiliary brake in a motor vehicle |
| DE4408350C2 (en) * | 1994-03-11 | 1995-08-31 | Voith Turbo Kg | Drive unit and method for operating the drive unit |
| DE19716919C2 (en) * | 1997-04-23 | 2001-07-12 | Voith Turbo Kg | Method and device for maximum utilization of the braking effect of a retarder |
| DE19716922C2 (en) * | 1997-04-23 | 2001-08-02 | Voith Turbo Kg | Method and device for the controlled limitation of the braking action of a retarder |
-
2006
- 2006-08-01 DE DE200610036185 patent/DE102006036185B3/en not_active Expired - Fee Related
-
2007
- 2007-07-31 BR BRPI0703134 patent/BRPI0703134A2/en not_active IP Right Cessation
- 2007-08-01 CN CN2007101383947A patent/CN101117114B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102472332A (en) * | 2009-08-13 | 2012-05-23 | 沃依特专利有限责任公司 | Method for controlling power transmission of hydrodynamic retarder |
| CN102947146A (en) * | 2010-03-03 | 2013-02-27 | 沃依特专利有限责任公司 | Hydrodynamic retarder and method for operating a hydrodynamic retarder |
| CN102947146B (en) * | 2010-03-03 | 2015-10-07 | 福伊特专利有限公司 | Hydrodynamic retarder and the method for running hydrodynamic retarder |
| CN104773151A (en) * | 2015-03-17 | 2015-07-15 | 吉林大学 | Method and device for automatically acquiring liquid filling ratio of hydrodynamic retarder |
| CN104773151B (en) * | 2015-03-17 | 2017-07-28 | 吉林大学 | The fill ratio automatic obtaining method and device of Retarder |
Also Published As
| Publication number | Publication date |
|---|---|
| BRPI0703134A2 (en) | 2009-08-04 |
| DE102006036185B3 (en) | 2007-11-29 |
| CN101117114B (en) | 2011-06-29 |
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