CN109624943A - A kind of electronic parking high temperature clamping method and system again - Google Patents
A kind of electronic parking high temperature clamping method and system again Download PDFInfo
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- CN109624943A CN109624943A CN201910035684.1A CN201910035684A CN109624943A CN 109624943 A CN109624943 A CN 109624943A CN 201910035684 A CN201910035684 A CN 201910035684A CN 109624943 A CN109624943 A CN 109624943A
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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
- B60T7/00—Brake-action initiating means
- B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
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- Valves And Accessory Devices For Braking Systems (AREA)
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Abstract
The invention proposes a kind of electronic parking high temperature clamping method and systems again.This method includes monitoring brake disc temperature in real time according to preset brake disc temperature rise model, when brake disc temperature reaches the preset temperature value into high temperature clip mode again, and vehicle is in parked state, decline model according to preset brake disc temperature, detect the variable quantity of brake disc temperature, when the variable quantity of brake disc temperature reaches preset value, it executes high temperature and presss from both sides operation again, until high temperature press from both sides again operation predetermined hold-time or brake disc temperature drop to it is preset exit high temperature again the temperature value of clip mode when, exit high temperature and press from both sides operation again.The system includes temperature monitoring module, parked state detection module, temperature variation detection module, parking execution module and parking braking control module.After the present invention is able to solve high temperature parking, since friction plate, brake disc gradually cool down, cause clamping force between the two inadequate, so as to cause vehicle anti-slide the problem of.
Description
Technical field
The present invention relates to Advanced Automotive Automatic Control field more particularly to a kind of electronic parking high temperature clamping method and to be again
System.
Background technique
Currently, with the rapid development of electronic technology, the intelligence degree of automobile is higher and higher.Electronic brake
(Electrical Park Brake, EPB) system is gradually instead of traditional mechanical parking brake function, electronic brake
System, which refers to, combines the long when property braking function after the provisional braking and parking in driving conditions, and by electronics
The technology of control mode realization stopping brake.
Since friction generates heat with brake disc for friction plate during vehicle braking, the heated volume of friction plate, brake disc is swollen
It is swollen.Vehicle pass through lower long slope operating condition when, friction plate, brake disc temperature can raised higher, friction plate, brake disc be heated
Volume expansion amount can be bigger.
After parking in vehicle friction piece, the excessively high situation of brake disc temperature, since friction plate, brake disc gradually cool down, temperature
Degree reduces so that the volume of friction plate, brake disc changes, and causes the clamping force between friction plate and brake disc inadequate, to lead
Vehicle anti-slide situation is caused, vehicle parking safety problem is influenced.
To sum up, a kind of electronic parking high temperature clamping method and system again are researched and developed, is solved in friction plate, the excessively high feelings of brake disc temperature
Under condition after parking, since friction plate, brake disc gradually cool down, cause the clamping force between friction plate and brake disc inadequate, to draw
The problem of vehicle anti-slide risen, it appears increasingly important.
Summary of the invention
The technical problem to be solved by the present invention is to solve the above-mentioned problems, the invention proposes a kind of electronic parking high temperature
Clamping method and system again, the present invention are specifically to be realized with following technical solution:
The first aspect of the present invention proposes a kind of electronic parking high temperature clamping method again, which comprises
Brake disc temperature is monitored in real time according to preset brake disc temperature rise model；
When the brake disc temperature reaches the preset temperature value of clip mode again into high temperature,Detect the parking shape of vehicle
State；
When vehicle is in parked state, model is declined according to preset brake disc temperature, detects the brake disc temperature
Variable quantity；
When the variable quantity of the brake disc temperature reaches preset value, controls the brake disc and height is executed to brake strip
Temperature presss from both sides operation again；
It repeats when the variable quantity of the brake disc temperature reaches preset value, controls the brake disc and brake strip is held
Row high temperature presss from both sides the step of operation again, when the high temperature again press from both sides operation predetermined hold-time or the brake disc temperature drop to it is default
Exit high temperature again the temperature value of clip mode when, control the brake disc and exit the high temperature and press from both sides operation again.
Further, described that brake disc temperature is monitored in real time according to preset brake disc temperature rise model, comprising: in real time
The environment temperature that acquisition vehicle is presently in obtains brake disc corresponding with the environment temperature according to the environment temperature
Temperature rise model monitors brake disc temperature in real time according to the brake disc temperature rise model corresponding with the environment temperature
Degree.
Further, the parked state of the detection vehicle, comprising: the current vehicle wheel rotational speed of acquisition vehicle, igniting in real time
The clamped condition of switch state and brake disc, when the vehicle wheel rotational speed is less than preset threshold value, the ignition switch is in and opens
When state and the brake disc in clamped condition, judge that vehicle is in parked state.
Further, described be in parked state when vehicle, according to preset brake disc temperature decline model, described in detection
The variable quantity of brake disc temperature, comprising: when vehicle is in parked state, acquisition brake disc temperature corresponding with the environment temperature
Degree decline model declines model according to the brake disc temperature corresponding with the environment temperature, detects the brake disc temperature
Whether the variable quantity of degree reaches preset value.
Further, described when the variable quantity of the brake disc temperature reaches preset value, the brake disc is controlled to system
Movable friction plate executes the step of high temperature presss from both sides operation again, further includes: when the variable quantity of the brake disc temperature reaches preset value, prolongs
Slow preset time after the preset time, controls the brake disc and executes high temperature to brake strip and press from both sides operation again.
The second aspect of the invention proposes a kind of electronic parking high temperature clipping system again, the system comprises:
Temperature monitoring module, for monitoring brake disc temperature in real time according to preset brake disc temperature rise model；
Parked state detection module, for reaching the preset temperature into high temperature clip mode again when the brake disc temperature
When value, the parked state of vehicle is detected；
Temperature variation detection module declines mould according to preset brake disc temperature for being in parked state when vehicle
Type detects the variable quantity of the brake disc temperature；
Parking execution module reaches preset value for the variable quantity when the brake disc temperature, controls the brake disc pair
Brake strip executes high temperature and presss from both sides operation again；And for pressing from both sides operation predetermined hold-time or the brake disc temperature again when the high temperature
Degree drop to it is preset exit high temperature again the temperature value of clip mode when, control the brake disc and exit the high temperature and press from both sides operation again；
Parking braking control module makes described for driving the parking execution module to control the brake disc
The brake disc execution high temperature presss from both sides operation again or exits the high temperature presss from both sides operation again.
Further, the temperature monitoring module includes temperature collecting module, temperature rise model acquisition module and temperature
Computing module,
The temperature collecting module, the environment temperature being presently in for acquiring vehicle in real time；
The temperature rise model obtains module, for obtaining opposite with the environment temperature according to the environment temperature
The brake disc temperature rise model answered；
The temperature computation module, for according to the brake disc temperature rise model corresponding with the environment temperature
Brake disc temperature is calculated in real time.
Further, the parked state detection module includes vehicle wheel rotational speed acquisition module, ignition lock state acquisition mould
Block, parking execution module state acquisition module and parked state judgment module,
The vehicle wheel rotational speed acquisition module, for acquiring the current vehicle wheel rotational speed of vehicle in real time；
The ignition lock state acquisition module, for acquiring the ignition lock state of vehicle in real time；
The parking execution module state acquisition module, for acquiring the clamped condition of the parking execution module in real time；
The parked state judgment module, for being less than preset threshold value, at the ignition switch when the vehicle wheel rotational speed
When open state and the parking execution module in clamped condition, judge that vehicle is in parked state.
Further, the temperature variation detection module includes that temperature decline model obtains module and temperature change meter
Module is calculated,
The temperature decline model obtains module, for obtaining and the environment temperature when vehicle is in parked state
Corresponding brake disc temperature declines model；
The temperature variation computing module, at a temperature of according to the brake disc corresponding with the environment temperature
Model drops, and whether the variable quantity for calculating the brake disc temperature reaches preset value.
Further, the control device includes pressing from both sides function execution module again and pressing from both sides function again to exit module,
It is described to press from both sides function execution module again, for when the variable quantity of the brake disc temperature reaches preset value, immediately or
The brake disc is controlled after preset time, and operation is pressed from both sides again to brake strip execution high temperature；
The function of pressing from both sides again exits module, for when it is described press from both sides operation predetermined hold-time or the brake disc again at a temperature of
Drop to it is preset exit high temperature again the temperature value of clip mode when, control the brake disc and exit the high temperature and press from both sides operation again.
The invention has the following beneficial effects:
(1) the application monitors brake disc temperature in real time, when brake disc temperature reaches preset into high temperature clip mode again
When temperature value, electronic parking system enters high temperature and presss from both sides function standby state again, presss from both sides function standby state again in high temperature, such as
Fruit detects that vehicle is in parked state (i.e. stationary vehicle, the pull-up of vehicle parked state), then according to preset brake disc temperature
Decline model, detects the variable quantity of brake disc temperature, as long as the variable quantity of brake disc temperature reaches preset value, control braking
Disk executes a high temperature to brake strip and presss from both sides operation again, until high temperature is pressed from both sides again at a temperature of operating predetermined hold-time or brake disc
Drop to it is preset exit high temperature again the temperature value of clip mode when, exit high temperature and press from both sides operation again.The application can well solve height
After warm parking, since friction plate, brake disc gradually cool down, cause the clamping force between friction plate and brake disc inadequate, so as to cause
Vehicle anti-slide the problem of.
(2) the application according to preset temperature rise model control Moving plate temperature, and according to preset brake disc at a temperature of
The variable quantity of model inspection brake disc temperature is dropped, and is repeatedly pressed from both sides again according to the variable quantity progress of temperature decline, so that this Shen
It is more accurate that high temperature please presss from both sides operation again.
(3) the application generalization degree is high, can do adaptability parameter adjustment, therefore, the application for each vehicle
Different automobile types are adapted to, other deceleration of electrons parking vehicles can be designed directly with reference to this strategy, avoided the occurrence of high temperature and stayed
Vehicle car slipping phenomenon.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the first flow diagram of electronic parking high temperature clamping method again in the embodiment of the present invention；
Fig. 2 is the working principle diagram of electronic parking high temperature clamping method again in the embodiment of the present invention；
Fig. 3 is second of flow diagram of electronic parking high temperature clamping method again in the embodiment of the present invention；
Fig. 4 is the first structural block diagram of electronic parking high temperature clamping method again in the embodiment of the present invention；
Fig. 5 is second of structural block diagram of electronic parking high temperature clamping method again in the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art without making creative work it is obtained it is all its
His embodiment, shall fall within the protection scope of the present invention.
Embodiment 1
As shown in Figure 1, present embodiment discloses a kind of electronic parking high temperature clamping methods again, which comprises
S110, brake disc temperature is monitored in real time according to preset brake disc temperature rise model；
Specifically, which includes: that the environment temperature that acquisition vehicle is presently in real time is obtained according to the environment temperature
Brake disc temperature rise model corresponding with the environment temperature is taken, according to the braking corresponding with the environment temperature
Disk temperature rise model monitors brake disc temperature in real time.
Because at different ambient temperatures, the brake disc temperature change of vehicle is different, for example, winter and summer, system
Moving plate temperature change can differ greatly, and in the present embodiment, be previously stored with several brake disc temperature corresponding with environment temperature
Rise model.And the brake disc temperature rise model prestored in the present embodiment is formed by customized method, it is specific
Forming process approximately as: under different environment temperature, multiple brake operation is carried out to vehicle, is braked each time, from brake
Start to the temperature at each time point of brake end to be different, acquires each time in brake process each time
The brake disc temperature of point, the brake disc temperature at each time point is input in temperature calculation models, forms a test temperature
Degree ascending curve (because of brake process, friction generates heat between brake disc and friction plate, in brake process, brake disc temperature
It is in rising trend, so the curve formed should also be an ascending curve).The a plurality of brake disc that multiple brake operation is formed
Temperature test ascending curve such as is denoised, is fitted at the processing, and it is warm to ultimately form a plurality of test corresponding with varying environment temperature
Spend ascending curve.
Above-mentioned test temperature ascending curve be drawn according to experiment because experimentation be possible to will receive other because
The influence of element, leading to test result not is very precisely, therefore, it is necessary to which the test temperature ascending curve obtained to test is repaired
Just.
Because the material of each brake disc, structure, heat dispersal situations are different, the present embodiment can be according to brake disc
The test temperature that is obtained by experimental test procedures of physically and/or chemically attribute (such as material, structure, heat dispersal situations etc.) Lai Xiuzheng
Ascending curve is spent, specifically, the present embodiment can obtain brake disc in different rings according to the physically and/or chemically attribute of brake disc
The theoretical temperatures ascending curve that temperature rises at a temperature of border, by the theoretical temperatures ascending curve to the test temperature ascending curve
It is modified, obtains revised temperature rising curve, and the revised temperature rising curve is exactly the system in the present embodiment
Moving plate temperature rise model, wherein different environment temperatures, it can be according to season division, for example, spring, summer, autumn and winter
It, can also divide, such as 1-10 DEG C, 10-20 DEG C, 20-30 DEG C etc. according to specific temperature value.
The environment temperature that vehicle is presently in is acquired by temperature sensor in real time in the present embodiment, when judgement is presently in
When environment temperature is summer, brake disc temperature corresponding with summer is obtained from preset brake disc temperature rise model and is risen
Model monitors brake disc temperature in real time according to brake disc temperature rise model corresponding with summer；When judgement is presently in ring
When border temperature is winter, from obtaining rising mould in corresponding with winter brake disc temperature in preset brake disc temperature rise model
Type monitors brake disc temperature in real time according to brake disc temperature rise model corresponding with winter.
S120, when the brake disc temperature reaches the preset temperature value of clip mode again into high temperature, detect vehicle
Parked state；
The preset temperature value into high temperature clip mode again is stored in the present embodiment, for example, can be preset entrance
The minimum temperature value of high temperature clip mode again, when detecting brake disc by brake disc temperature rise model corresponding with environment temperature
Temperature reach it is preset into high temperature again the minimum temperature value of clip mode when, then enter high temperature clip mode standby state again, this
When, whether detection vehicle is in parked state；
Specifically detected in the present embodiment vehicle whether be in parked state method it is as follows:
The clamped condition for acquiring the current vehicle wheel rotational speed of vehicle, ignition lock state and brake disc in real time, when the wheel
Revolving speed is less than preset threshold value (when vehicle wheel rotational speed is less than preset threshold value, it can be determined that vehicle remains static), the point
When fire switch is in the open state and the brake disc is in clamped condition, judge that vehicle is in parked state.
S130, parked state is in when vehicle, model is declined according to preset brake disc temperature, detects the brake disc temperature
The variable quantity of degree；
Specifically, which includes: when vehicle is in parked state, acquisition brake disc corresponding with the environment temperature
Temperature declines model, declines model according to the brake disc temperature corresponding with the environment temperature, detects the brake disc
Whether the variable quantity of temperature reaches preset value；
Because at different ambient temperatures, the brake disc temperature change of vehicle is different, for example, winter and summer, system
Moving plate temperature change can differ greatly, and in the present embodiment, be previously stored with several brake disc temperature corresponding with environment temperature
Decline model.And the brake disc temperature decline model prestored in the present embodiment is also to be formed by customized method, tool
Body forming process approximately as: under different environment temperatures, multiple brake operation is carried out to vehicle, acquisition parking each time is complete
The brake disc temperature of Cheng Hou, each time point decline situation of change, and the brake disc temperature at each time point is input to temperature
It spends in computation model, forming a test temperature decline curve, (because after parking, brake disc, friction plate can be cooled down gradually, braking
Disk temperature is on a declining curve, so the curve formed should also be a decline curve).The a plurality of braking that multiple brake is formed
Disk temperature test decline curve such as is denoised, is fitted at the processing, ultimately forms a plurality of test corresponding with varying environment temperature
Temperature decline curve.
Above-mentioned test temperature decline curve be drawn according to experiment because experimentation be possible to will receive other because
The influence of element, leading to test result not is very precisely, therefore, it is necessary to which the test temperature decline curve obtained to test is repaired
Just.
Because the material of each brake disc, structure, heat dispersal situations are different, the present embodiment can be according to brake disc
The test temperature that is obtained by experimental test procedures of physically and/or chemically attribute (such as material, structure, heat dispersal situations etc.) Lai Xiuzheng
Decline curve is spent, specifically, the present embodiment can obtain brake disc in different rings according to the physically and/or chemically attribute of brake disc
The theoretical temperatures decline curve that temperature declines at a temperature of border, by the theoretical temperatures decline curve to the test temperature decline curve
It is modified, obtains revised temperature decline curve, and the revised temperature decline curve is exactly the system in the present embodiment
Moving plate temperature declines model, wherein different environment temperatures, it can be according to season division, for example, spring, summer, autumn and winter
It, can also divide, such as 1-10 DEG C, 10-20 DEG C, 20-30 DEG C etc. according to specific temperature value.
In the present embodiment, when vehicle is in parked state, and current environment temperature is summer, from preset braking
Disk temperature, which declines, obtains brake disc temperature decline model corresponding with summer in model, according to the system corresponding with summer
Moving plate temperature declines model, and whether the variable quantity for detecting the brake disc temperature reaches preset value；When vehicle is in parked state,
And current environment temperature obtains corresponding with winter braking from preset brake disc temperature decline model when being winter
Disk temperature declines model, declines model according to the brake disc temperature corresponding with winter, detects the brake disc temperature
Whether variable quantity reaches preset value.
S140, when the variable quantity of the brake disc temperature reaches preset value, control the brake disc to brake strip
It executes high temperature and presss from both sides operation again；
S150, it repeats when the variable quantity of the brake disc temperature reaches preset value, controls the brake disc and rub to braking
Pad executes the step of high temperature presss from both sides operation again, when the high temperature presss from both sides operation predetermined hold-time or brake disc temperature decline again
To it is preset exit high temperature again the temperature value of clip mode when, control the brake disc and exit the high temperature and press from both sides operation again.
Wherein, the clamping force that the high temperature in the present embodiment presss from both sides operation again can not be according to vehicle environment locating at that time come really
It is fixed, for example clamping force can be determined according to the gradient, specifically, the ramp of 0-5%, is defaulted as being level road, can use smaller
Clamping force, the ramp of 5-15% is defaulted as being medium ramp, can use biggish clamping force, 15-30% heavy grade can
To use maximum clamping force.Other than vehicle environment locating at that time, the whole-car parameters of vehicle, for example, weight etc., and really
Determine the influence factor for the clamping force that high temperature presss from both sides again.
It specifically, is not when the variable quantity of brake disc temperature reaches preset value, progress is once pressed from both sides again in the present embodiment
Just terminate, as soon as but the variable quantity of brake disc temperature often reaches time preset value, progress once is pressed from both sides again, that is to say, that progress
Repeatedly press from both sides again, until the duration that high temperature presss from both sides operation again reach preset time or brake disc temperature drop to exit it is default
Exit high temperature again the temperature value of clip mode when, just stop high temperature and press from both sides operation again, preset in the present embodiment exits high temperature again
The temperature value of clip mode, for example, can be the preset maximum temperature values for exiting high temperature clip mode again.
In the following, the electronic parking high temperature during this embodiment is illustrated by way of example again how implemented by clamping method:
It is illustrated in figure 2 the working principle diagram of the present embodiment, is such as given a definition to the parameters in the present embodiment: is fixed
The preset minimum temperature value (on temp) into high temperature clip mode again of justice is 350 DEG C, defines and preset exits high temperature clamping again
The maximum temperature values (off temp) of formula are 250 DEG C, define high temperature and press from both sides the lasting maximum duration (max_wake_up_ of operation again
It time) is 1h, definition controls the brake disc and rub to braking when the variable quantity (drop temp) of brake disc temperature is 80 DEG C
Pad executes a high temperature and presss from both sides operation again, and the condition that definition enters high temperature clip mode again is: vehicle is in power-up state, and braking
The temperature of disk reaches the preset minimum temperature value (on temp) into high temperature clip mode again, and defining high temperature, clip mode moves back again
Condition is out: the temperature of brake disc reaches preset and exits the high temperature maximum temperature values (off temp) of clip mode or entrance height again
The state machine duration, which reaches a high temperature to press from both sides again, when warm clip mode again operates lasting maximum duration (max_wake_up_time), fixed
Clamp bar part is adopted high temperature again: vehicle remains static, and parking device state is in applied state (i.e. at parking execution module
In clamped condition), drop temp reaches setting value.
Firstly, acquiring environment nowadays temperature by external temperature collector, braking corresponding with environment temperature is obtained
Disk temperature rise model monitors brake disc in real time according to the brake disc temperature rise model corresponding with the environment temperature
Temperature is pressed from both sides standby state again into high temperature, is detected at this time when the brake disc temperature reaches 350 DEG C (i.e. on temp)
Whether vehicle is in parked state (assuming that parking braking disk temperature is 600 DEG C), and when vehicle is in parked state, (i.e. vehicle is in
Static and parking execution module is in clamped condition), it obtains preset brake disc temperature corresponding with environment temperature and declines model
Whether the variable quantity (drop temp) for detecting the brake disc temperature is 80 DEG C (brake disc temperature is 520 DEG C at this time), if so,
It then controls the brake disc and operation is pressed from both sides again to brake strip execution first time high temperature, when the temperature of brake disc declines 80 DEG C again
(brake disc temperature is 440 DEG C at this time) makes the brake disc and presss from both sides operation again to brake strip second of high temperature of execution, work as braking
The temperature of disk declines 80 DEG C again when (brake disc temperature is 360 DEG C at this time), makes the brake disc and third is executed to brake strip
Secondary high temperature presss from both sides operation again, and so on, reach 1h until the duration that high temperature presss from both sides operation again, that is, reaches max_wake_up_
When time or brake disc temperature drop to 250 DEG C (i.e. off temp), just stops high temperature and press from both sides operation again.
Embodiment 2
As shown in figure 3, present embodiment discloses another electronic parking high temperature clamping methods again, which comprises
S210, brake disc temperature is monitored in real time according to preset brake disc temperature rise model；
S220, when the brake disc temperature reaches the preset temperature value of clip mode again into high temperature, detect vehicle
Parked state；
S230, parked state is in when vehicle, model is declined according to preset brake disc temperature, detects the brake disc temperature
The variable quantity of degree；
The detailed process of step S210-S230 please refers to S110-S130, and this is no longer going to repeat them.
S240, when the variable quantity of the brake disc temperature reaches preset value, postpone preset time, the preset time it
Afterwards, it controls the brake disc and operation is pressed from both sides again to brake strip execution high temperature；
In the present embodiment, when the variable quantity of brake disc temperature reaches preset value, high temperature can not be executed at once and presss from both sides behaviour again
Make, but can first postpone preset time, for example can first postpone 10s, 10s controls the brake disc to drag friction later again
Piece executes high temperature and presss from both sides operation again.Executing the reason of high temperature presss from both sides operation again again after setting preset time in the present embodiment is: in reality
In, there are starting within a very short time and at once after vehicle parking, in that case it is possible to brake disc
Temperature variation preset value has not been reached yet, it is necessary to vehicle is relaunched, in order to avoid the generation of above situation, this implementation
Example is provided with delay time, and after delay time, confirmation is not needed after starting vehicle at once, then executes high temperature and press from both sides operation again.
S250, it repeats when the variable quantity of the brake disc temperature reaches preset value, postpones preset time, when described default
Between after, control the brake disc to brake strip execute high temperature press from both sides operation again the step of, held when the high temperature presss from both sides operation again
Continuous predetermined time or the brake disc temperature drop to it is preset exit high temperature again the temperature value of clip mode when, control the braking
Disk exits the high temperature and presss from both sides operation again.
It specifically, is not when the variable quantity of brake disc temperature reaches preset value, with regard to carrying out one at once in the present embodiment
Secondary press from both sides again just terminates, but the variable quantity of brake disc temperature often reaches preset value, and postpones preset time, just progress one
It is secondary to press from both sides again, that is to say, that after temperature variation often reaches a preset value and delay preset time, progress is repeatedly pressed from both sides again,
Until the duration that high temperature presss from both sides operation again reaches preset time or brake disc temperature drops to exit and preset exits high temperature
Again when the temperature value of clip mode, just stops high temperature and press from both sides operation again.
Embodiment 3
As shown in Figures 4 and 5, present embodiment discloses a kind of electronic parking high temperature clipping system again, the system comprises:
Temperature monitoring module, for monitoring brake disc temperature in real time according to preset brake disc temperature rise model；
Specifically, the temperature monitoring module includes temperature collecting module, temperature rise model acquisition module and thermometer
Calculate module；
The temperature collecting module, the environment temperature being presently in for acquiring vehicle in real time；
The temperature rise model obtains module, for obtaining opposite with the environment temperature according to the environment temperature
The brake disc temperature rise model answered；
The temperature computation module, for according to the brake disc temperature rise model corresponding with the environment temperature
Brake disc temperature is calculated in real time.
Parked state detection module, for reaching the preset temperature into high temperature clip mode again when the brake disc temperature
When value, the parked state of vehicle is detected；
Specifically, the parked state detection module include vehicle wheel rotational speed acquisition module, ignition lock state acquisition module,
Parking execution module state acquisition module and parked state judgment module,
The vehicle wheel rotational speed acquisition module, for acquiring the current vehicle wheel rotational speed of vehicle in real time；
The ignition lock state acquisition module, for acquiring the ignition lock state of vehicle in real time；
The parking execution module state acquisition module, for acquiring the clamped condition of the parking execution module in real time；
The parked state judgment module, for being less than preset threshold value, at the ignition switch when the vehicle wheel rotational speed
When open state and the parking execution module in clamped condition, judge that vehicle is in parked state.
Temperature variation detection module declines mould according to preset brake disc temperature for being in parked state when vehicle
Type detects the variable quantity of the brake disc temperature；
Specifically, the temperature variation detection module includes that temperature decline model chooses module and temperature variation calculating
Module,
The temperature decline model obtains module, for obtaining and the environment temperature when vehicle is in parked state
Corresponding brake disc temperature declines model；
The temperature variation computing module, at a temperature of according to the brake disc corresponding with the environment temperature
Model drops, and whether the variable quantity for calculating the brake disc temperature reaches preset value.
Parking execution module, including press from both sides function execution module again and press from both sides function again and exit module, it is described to press from both sides function execution again
Module is used to reach preset value when the variable quantity of the brake disc temperature, controls the brake disc immediately or after preset time to system
Movable friction plate executes high temperature and presss from both sides operation again；The function of pressing from both sides again exits module for pressing from both sides operation again and continuing pre- timing when the high temperature
Between or the brake disc temperature drop to it is preset exit high temperature again the temperature value of clip mode when, control the brake disc and exit institute
It states high temperature and presss from both sides operation again；
Parking braking control module makes described for driving the parking execution module to control the brake disc
The brake disc execution high temperature presss from both sides operation again or exits the high temperature presss from both sides operation again.
The preset temperature value into high temperature clip mode again in the present embodiment, for example, high temperature can be entered to be preset
The minimum temperature value of clip mode again, the preset temperature value for exiting high temperature clip mode again, for example, high temperature can be exited to be preset
The maximum temperature values of clip mode again.
It should be noted that the module in the present embodiment is one-to-one with the method in embodiment 1.
The embodiment of the present invention has the following beneficial effects:
(1) the application monitors brake disc temperature in real time, when brake disc temperature reaches preset into high temperature clip mode again
When temperature value, electronic parking system enters high temperature and presss from both sides function standby state again, presss from both sides function standby state again in high temperature, such as
Fruit detects that vehicle is in parked state (i.e. stationary vehicle, the pull-up of vehicle parked state), then according to preset brake disc temperature
Decline model, detects the variable quantity of brake disc temperature, as long as the variable quantity of brake disc temperature reaches preset value, control braking
Disk executes a high temperature to brake strip and presss from both sides operation again, until high temperature is pressed from both sides again at a temperature of operating predetermined hold-time or brake disc
Drop to it is preset exit high temperature again the temperature value of clip mode when, exit high temperature and press from both sides operation again.The application can well solve height
After warm parking, since friction plate, brake disc gradually cool down, cause the clamping force between friction plate and brake disc inadequate, so as to cause
Vehicle anti-slide the problem of.
(2) the application according to preset temperature rise model control Moving plate temperature, and according to preset brake disc at a temperature of
The variable quantity of model inspection brake disc temperature is dropped, and is repeatedly pressed from both sides again according to the variable quantity progress of temperature decline, so that this Shen
It is more accurate that high temperature please presss from both sides operation again.
(3) the application generalization degree is high, can do adaptability parameter adjustment, therefore, the application for each vehicle
Different automobile types are adapted to, other deceleration of electrons parking vehicles can be designed directly with reference to this strategy, avoided the occurrence of high temperature and stayed
Vehicle car slipping phenomenon.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of electronic parking high temperature clamping method again characterized by comprising
Brake disc temperature is monitored in real time according to preset brake disc temperature rise model；
When the brake disc temperature reaches the preset temperature value of clip mode again into high temperature, the parked state of vehicle is detected；
When vehicle is in parked state, model is declined according to preset brake disc temperature, detects the variation of the brake disc temperature
Amount；
When the variable quantity of the brake disc temperature reaches preset value, controls the brake disc and high temperature is executed again to brake strip
Folder operation；
It repeats when the variable quantity of the brake disc temperature reaches preset value, controls the brake disc and height is executed to brake strip
Temperature the step of pressing from both sides operation again, when the high temperature presss from both sides operation predetermined hold-time or the brake disc temperature drops to preset move back again
Out high temperature again the temperature value of clip mode when, control the brake disc and exit the high temperature and press from both sides operation again.
2. electronic parking high temperature according to claim 1 clamping method again, which is characterized in that described according to preset brake disc
Temperature rise model monitors brake disc temperature in real time, comprising:
The environment temperature that acquisition vehicle is presently in real time obtains corresponding with the environment temperature according to the environment temperature
Brake disc temperature rise model, monitored in real time according to corresponding with the environment temperature brake disc temperature rise model
Brake disc temperature.
3. electronic parking high temperature according to claim 1 clamping method again, which is characterized in that the parking shape of the detection vehicle
State, comprising:
The clamped condition for acquiring the current vehicle wheel rotational speed of vehicle, ignition lock state and brake disc in real time, when the vehicle wheel rotational speed
Less than preset threshold value, when the ignition switch is in the open state and the brake disc is in clamped condition, judge at vehicle
In parked state.
4. electronic parking high temperature according to claim 2 clamping method again, which is characterized in that described when vehicle is in parking shape
State declines model according to preset brake disc temperature, detects the variable quantity of the brake disc temperature, comprising:
When vehicle is in parked state, acquisition brake disc temperature corresponding with the environment temperature declines model, according to described
Brake disc temperature corresponding with the environment temperature declines model, and whether the variable quantity for detecting the brake disc temperature reaches pre-
If value.
5. electronic parking high temperature according to claim 1 clamping method again, which is characterized in that described to work as the brake disc temperature
Variable quantity when reaching preset value, control the brake disc and the step of high temperature presss from both sides operation again executed to brake strip, further includes:
When the variable quantity of the brake disc temperature reaches preset value, postpone preset time, after the preset time, controls the system
Moving plate executes high temperature to brake strip and presss from both sides operation again.
6. a kind of electronic parking high temperature clipping system again characterized by comprising
Temperature monitoring module, for monitoring brake disc temperature in real time according to preset brake disc temperature rise model；
Parked state detection module, for reaching the preset temperature value into high temperature clip mode again when the brake disc temperature
When, detect the parked state of vehicle；
Temperature variation detection module declines model, inspection according to preset brake disc temperature for being in parked state when vehicle
Survey the variable quantity of the brake disc temperature；
Parking execution module reaches preset value for the variable quantity when the brake disc temperature, controls the brake disc to braking
Friction plate executes high temperature and presss from both sides operation again；And at a temperature of the high temperature presss from both sides operation predetermined hold-time or the brake disc again
Drop to it is preset exit high temperature again the temperature value of clip mode when, control the brake disc and exit the high temperature and press from both sides operation again；
Parking braking control module makes the braking for driving the parking execution module to control the brake disc
The disk execution high temperature presss from both sides operation again or exits the high temperature presss from both sides operation again.
7. electronic parking high temperature according to claim 5 clipping system again, which is characterized in that the temperature monitoring module includes
Temperature collecting module, temperature rise model obtain module and temperature computation module,
The temperature collecting module, the environment temperature being presently in for acquiring vehicle in real time；
The temperature rise model obtains module, for obtaining corresponding with the environment temperature according to the environment temperature
Brake disc temperature rise model；
The temperature computation module, for real-time according to the brake disc temperature rise model corresponding with the environment temperature
Calculate brake disc temperature.
8. electronic parking high temperature according to claim 5 clipping system again, which is characterized in that the parked state detection module
Including vehicle wheel rotational speed acquisition module, ignition lock state acquisition module, parking execution module state acquisition module and parked state
Judgment module,
The vehicle wheel rotational speed acquisition module, for acquiring the current vehicle wheel rotational speed of vehicle in real time；
The ignition lock state acquisition module, for acquiring the ignition lock state of vehicle in real time；
The parking execution module state acquisition module, for acquiring the clamped condition of the parking execution module in real time；
The parked state judgment module, for being less than preset threshold value when the vehicle wheel rotational speed, the ignition switch is in and opens
When opening state and the parking execution module in clamped condition, judge that vehicle is in parked state.
9. electronic parking high temperature according to claim 7 clipping system again, which is characterized in that the temperature variation detects mould
Block includes that temperature decline model obtains module and temperature variation computing module,
The temperature decline model obtains module, for obtaining opposite with the environment temperature when vehicle is in parked state
The brake disc temperature decline model answered；
The temperature variation computing module, for declining mould according to the brake disc temperature corresponding with the environment temperature
Whether type, the variable quantity for calculating the brake disc temperature reach preset value.
10. electronic parking high temperature according to claim 5 clipping system again, which is characterized in that the parking execution module packet
It includes to press from both sides function execution module again and press from both sides function again and exits module,
It is described to press from both sides function execution module again, for immediately or presetting when the variable quantity of the brake disc temperature reaches preset value
The brake disc is controlled after time, and operation is pressed from both sides again to brake strip execution high temperature；
The function of pressing from both sides again exits module, for press from both sides operation predetermined hold-time again or the brake disc temperature drops to when described
It is preset exit high temperature again the temperature value of clip mode when, control the brake disc and exit the high temperature and press from both sides operation again.
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| CN201910035684.1A CN109624943B (en) | 2019-01-15 | 2019-01-15 | Electronic parking high-temperature re-clamping method and system |
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| CN201910035684.1A CN109624943B (en) | 2019-01-15 | 2019-01-15 | Electronic parking high-temperature re-clamping method and system |
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| CN113460019A (en) * | 2020-03-31 | 2021-10-01 | 比亚迪股份有限公司 | Method for monitoring temperature of brake disc in real time, storage medium and vehicle |
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