CN102416934A - Electrical park brake (EPB) system and park control method - Google Patents
Electrical park brake (EPB) system and park control method Download PDFInfo
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- CN102416934A CN102416934A CN2011103226913A CN201110322691A CN102416934A CN 102416934 A CN102416934 A CN 102416934A CN 2011103226913 A CN2011103226913 A CN 2011103226913A CN 201110322691 A CN201110322691 A CN 201110322691A CN 102416934 A CN102416934 A CN 102416934A
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Abstract
The invention provides an electrical park brake (EPB) system and a park control method. The EPB system integrates a temporary brake function in the driving process with a long-term brake function after park, an EPB technology integrated with front and rear brake calipers is adopted, the system has a manual park brake function and an automatic park brake function simultaneously, the manual park brake function comprises the conventional basic park control function and emergency park brake function, and the automatic park brake function comprises a ramp departure control function, an automatic park control function and a slip reclamp control function, so that park, brake, start, departure and the like are performed under the direct instruction and automatic control of the EPB system through the functions, park brake is more safely and reliably performed, and the system is more simply, conveniently and intelligently operated.
Description
Technical field
The present invention relates to the braking during standstill field of automobile, relate to a kind of electronic brake system and Parking control method thereof in particular based on the brake-by-wire technology.
Background technology
The braking during standstill tradition of automobile is to rely on the mechanical type parking brake to carry out braking during standstill; This traditional mechanical type parking brake braking during standstill uses very inconvenience; And the strength size of different chaufeurs is different; The braking during standstill of parking brake braking during standstill bar maybe be different to the practical function of braking force thus, and parking brake takies space limited in the compartment in addition, and the response time of braking during standstill is also long.Continuous progress along with auto technology; There is increasing automobile control element to gradually become electronic type control now from traditional mechanical control; Electronic brake system is the function that realizes traditional emergency brake system with electric energy; Existing electronic brake system is to replace traditional parking brake braking and vehicle is carried out provisional braking mostly; Just traditional braking during standstill mode that pulls the braking during standstill bar is replaced with the braking during standstill mode of hand by the braking during standstill button, easier with respect to its operation of traditional parking brake to braking during standstill, but the function of the function of existing this electronic brake system and the braking of traditional parking brake is similar; Function is simple relatively and can not remove manually the automatic parking brake the control to vehicle and control; Therefore its intellectuality is lower, and existing electronic brake system is the same with parking brake, does not adopt and the incorporate technology of front and back brake clamp; Its braking safety is lower, and therefore the function of electronics parking system of the prior art and performance remain further to be improved to be fit to the vehicular drive demand of greater security and simple operation property.
Summary of the invention
The present invention is based on above-mentioned technical matters and propose; Be that the present invention provides a kind of intelligent electronic emergency brake system (EPB:Electrical Park Brake) and strategy that has manual parking braking function and automatic parking brake function simultaneously; Its with the provisional braking in the driving process and the long time property braking function after stopping combine; And the incorporate EPB technology of employing and front and back brake clamp, improved safety, the convenience and intelligent of braking during standstill greatly.
The present invention solves the problems of the technologies described above the technical scheme of being taked:
A kind of electronic brake system; Comprise EPB button input block 1, ECU ECU 3, front and back caliper unit and instrument display unit 6; The input end of wherein said ECU ECU 3 is connected with EPB button input block 1 and vehicle-mounted CAN bus; Caliper unit and instrument display unit 6 before and after the mouth of ECU ECU 3 is connected with; It is characterized in that described electronic brake system has automatic parking brake function and manual parking braking function simultaneously concurrently, wherein said automatic parking brake function comprises: the ramp sails out of controllable function, automatic parking controllable function and the car that slips presss from both sides controllable function again; Said manual parking braking function comprises: basic Parking controllable function and urgent parking braking function, basic Parking controllable function wherein comprise general manual parking braking and braking during standstill cancellation function.
Further in such scheme of the present invention, each function of said electronic brake system is to generate based on the incoming signal of EPB button input block 1 and vehicle-mounted CAN bus through ECU ECU 3 to be used to carry out the various control signals of vehicle braking during standstill and to realize based on caliper unit before and after these control signals controls.
Further in such scheme of the present invention; Described manual parking braking function is based on the brake control function of manually pushing the EPB electronic button on the EPB button input block 1 and carrying out; Described automatic parking brake function is under said EPB electronic button is in not down state, by the ECU ECU based on the information of vehicle-mounted CAN bus and to the parking of vehicle, automated intelligent controllable function that the state of sailing out of carries out.
Further in such scheme of the present invention, described EPB button input block 1 directly or through the vehicle-mounted CAN bus connects and ECU ECU 3; Described front and back caliper unit is made up of front wheel brake pincers unit 4 and trailing wheel caliper unit 5 that speed reduction gearing, electric clutch and control motor are housed; The control signal of said ECU ECU 3 outputs transfers to front wheel brake pincers unit 4 and trailing wheel caliper unit 5 simultaneously, simultaneously vehicle front-wheel and trailing wheel is carried out control of braking with trailing wheel caliper unit 5 based on same control signal by this front wheel brake pincers unit 4.
Further in such scheme of the present invention, described basic Parking controllable function is included in that vehicle is in the manual parking braking function by manually pressing the EPB electronic button vehicle carried out under the docked state and is in the braking during standstill cancellation function of by manually pressing the EPB electronic button vehicle being carried out under the braking during standstill state at vehicle; Described urgent parking braking function is when vehicle is in the cruising state, the parking braking function of driving vehicle being carried out by manually pressing the EPB electronic button with maximum Parking gripping power.
Further in such scheme of the present invention; Described ramp is sailed out of controllable function and is meant at the ECU ECU and knows that based on the information of CAN bus vehicle is in when preparing to sail out of state, automatically terminates braking during standstill so that the function that vehicle can sail out of automatically by caliper unit before and after the control of ECU ECU; Said automatic parking controllable function is meant that when the ECU ECU knows that based on the information of CAN bus vehicle is in docked state the vehicle of braking during standstill state automatically performs the function that braking during standstill is controlled to being in not by the ECU ECU; Said slide car presss from both sides controllable function again and is meant when vehicle under being in the braking during standstill state occur to slide, by the ECU ECU forwards, backwards caliper unit send the function of control of braking once more.
Further in such scheme of the present invention, the said preparation state of sailing out of is meant that the ECU ECU knows that based on the information of CAN bus engine speed when vehicle is not 0, power-transfer clutch closes, gear is the vehicle state of living in when non-neutral, Das Gaspedal have been stepped on down and brake-pedal travel is 0 simultaneously; Said braking during standstill state is identified by the braking during standstill zone bit in the ECU ECU; Said docked state be meant the ECU ECU based on the information of CAN bus know that engine speed when vehicle is 0, the speed of a motor vehicle is 0, ignition lock is in OFF, gear is the vehicle state of living in that sky and Das Gaspedal are not stepped on following time.
Further the present invention provides a kind of and uses electronic brake system described in the technique scheme to the method that vehicle carries out Parking control, it is characterized in that said method comprises following process:
(1), the EPB electronic button that detects in the EPB button input block 1 when the ECU ECU is pressed following time; The ECU ECU judges automatically whether vehicle is in the state of Parking; If vehicle is in not Parking state; Then the ECU ECU judges that further vehicle is in docked state or motoring condition; When vehicle be in docked state then the ECU ECU vehicle is carried out common manual parking braking, when vehicle be in motoring condition then the ECU ECU vehicle is carried out urgent braking during standstill with maximum Parking gripping power; When if vehicle is in the Parking state at the EPB electronic button when depressing, then caliper unit is in open mode and Das Gaspedal at ignition lock and is in and removes braking during standstill when stepping on down state before and after the control of ECU ECU;
(2), when the EPB electronic button is in not down state; Then the ECU ECU judges that based on bus signals vehicle is in preparation and sails out of state or docked state; If be in the state that sails out of of preparing, then automatically terminate braking during standstill so that vehicle can sail out of automatically by caliper unit before and after the control of ECU ECU; If this moment, vehicle was in docked state; The ECU ECU judges further this moment, whether vehicle carried out braking during standstill; Then by the ECU ECU it is not automatically performed braking during standstill control if carry out braking during standstill, if carried out braking during standstill, then the ECU ECU judges further also whether the wheel of vehicle this moment is in rolling, sliding mode; If then by the ECU ECU forwards, backwards caliper unit send brake control signal once more, press from both sides control again vehicle carry out is slipped car.
Further in said method of the present invention; The numerical value that the judgement that wherein whether is in the Parking state about vehicle is based on the braking during standstill zone bit in the ECU ECU carries out; When the braking during standstill zone bit is 1; The expression vehicle is in the braking during standstill state, and when zone bit was 0, the expression vehicle was in not braking during standstill state; Wherein said docked state be meant the ECU ECU based on the information of CAN bus know that engine speed when vehicle is 0, the speed of a motor vehicle is 0, ignition lock is in OFF, gear is the vehicle state of living in that sky and Das Gaspedal are not stepped on following time; The wherein said preparation state of sailing out of be meant the ECU ECU based on the information of CAN bus know that engine speed when vehicle is not 0, power-transfer clutch closes, gear is that non-neutral, Das Gaspedal have been stepped on down and the vehicle of living in state of brake-pedal travel when being 0.
Further in said method of the present invention, the concrete execution flow process of said method is: detect the EPB electronic button and whether be pressed down,, otherwise carry out following steps (2) if then carry out following steps (1), wherein:
Step (1): whether ECU ECU inspection braking during standstill zone bit is 1, if then carry out the a1 step, otherwise carries out the b1 step:
Wherein the a1 step comprises: judge whether ignition lock is opened; If whether then further judge Das Gaspedal steps on down; If then remove braking during standstill; With braking during standstill mark position 0, withdraw from then simultaneously, if wherein ignition lock is not opened or Das Gaspedal is not stepped on and nextly do not removed braking during standstill and directly withdraw from;
Wherein the b1 step comprises: judge that vehicle is in docked state or motoring condition; If being in docked state, vehicle then vehicle is carried out common braking during standstill; And with braking during standstill mark position 1; If vehicle is in motoring condition and then vehicle is carried out urgent braking during standstill, and with braking during standstill mark position 1;
Step (2): the ECU ECU judges that based on bus signals vehicle is in preparation and sails out of state or docked state:
Wherein, check further then whether the braking during standstill zone bit is 1 if vehicle is in to be prepared to sail out of state, if then control front and back caliper unit automatically terminates braking during standstill, and with braking during standstill mark position 0;
Wherein if vehicle is in docked state; Check further then whether the braking during standstill zone bit is 0; If then caliper unit is carried out braking during standstill before and after the control, and with braking during standstill mark position 1, if the braking during standstill zone bit is not 0; Whether the wheel of then further judging vehicle this moment is in rollings, sliding mode, if then forwards, backwards caliper unit send brake control signal once more and press from both sides control again vehicle is carried out the slide car.
Further in said method of the present invention, said each implementation is to generate based on the incoming signal of EPB button input block 1 and vehicle-mounted CAN bus through ECU ECU 3 to be used to carry out the various control signals of vehicle braking during standstill and based on these control signals the front and back caliper unit is carried out corresponding control and realize.
Further in said method of the present invention, said ECU ECU simultaneously with cooresponding braking during standstill information or Parking cancellation information is sent to display instrument unit, with online demonstration vehicle residing state with braking during standstill mark position 1 or put at 0 o'clock.
The present invention the technique effect that will reach:
Electronic brake system of the present invention replaces conventional manual braking during standstill bar through adopting an electronic button within reach; Not only reserve more space in the compartment; The more important thing is to make the chaufeur braking during standstill bar that pulls the hand brake of needn't requiring great effort, simply laborsaving, improved greatly and driven and traveling comfort and the comfort feature handled; And the braking strength of system is fixed, and can not vary with each individual deviation occurs.
Electronic brake system of the present invention with the provisional braking in the driving process and the long time property braking function after stopping combine; Have manual parking braking and automatic parking brake function simultaneously; Make to stop, to brake, start to walk, sail out of etc. all under the direct indication of EPB system and automatic guidance and carry out; Can intelligence apply braking during standstill; And can apply maximum flexibility Parking gripping power guaranteeing can not slip car, and shortened the response time of braking during standstill, and through adopting the safety that has further improved braking during standstill with the incorporate EPB technology of front and back brake clamp.
Therefore electronic brake system of the present invention has all advanced major step than the traditional hand braking during standstill pattern and the existing electronics parking system of long-term use.
Description of drawings
Fig. 1 is the structure principle chart of electronic brake system according to the invention;
The Parking control flow chart that Fig. 2 is to use electronic brake system according to the invention that vehicle is carried out, that is the working process of electronic brake system according to the invention.
The specific embodiment
Contrast accompanying drawing below; Specific embodiments of the invention is done further detailed explanation; Helping those skilled in the art that inventive concept of the present invention, technical scheme are had more complete, accurate and deep understanding, but and do not mean that technical scope of the present invention is defined in these concrete accompanying drawing structures.
Electronic brake system of the present invention is a kind of emergency brake system based on brake-by-wire, and it is based on the M/C signal and the vehicle-mounted CAN bus signals of electronic button, by each braking working process of ECU ECU control wherein.
Shown in accompanying drawing 1; Electronic brake system of the present invention comprises EPB button input block 1, ECU ECU 3, front and back caliper unit and instrument display unit 6; Wherein EPB button input block 1 is provided with the EPB electronic button; Be used for manually opened braking during standstill, the incoming signal of this EPB button input block 1 can directly transfer to ECU ECU 3, also can transfer to ECU ECU 3 through the vehicle-mounted CAN bus; This ECU ECU 3 is connected in EPB button input block 1 and vehicle-mounted CAN bus simultaneously; And generating the control signal that is used to carry out the vehicle braking during standstill based on the incoming signal of EPB button input block 1 and vehicle-mounted CAN bus, the automated intelligent Parking control signal of system according to the invention is realized by this ECU ECU 3, caliper unit and instrument display unit 6 before and after the mouth of this ECU ECU 3 is connected with; Be used for the control signal of caliper unit output forwards, backwards, and to the residing status signal of instrument display unit 6 output vehicles.Described front and back caliper unit is made up of front wheel brake pincers unit 4 and trailing wheel caliper unit 5 that speed reduction gearing, electric clutch and control motor are housed; This front wheel brake pincers unit 4 and trailing wheel caliper unit 5 are respectively applied for the braking during standstill of control vehicle front-wheel and trailing wheel; Brake clamp incorporate EPB technology in front and back according to the invention is meant that the control signal of ECU ECU 3 outputs transfers to front wheel brake pincers unit 4 and trailing wheel caliper unit 5 simultaneously; Simultaneously vehicle front-wheel and trailing wheel carried out control of braking with trailing wheel caliper unit 5 based on same control signal by this front wheel brake pincers unit 4; Technology with respect to existing only trailing wheel braking has further improved the braking dynamics, makes braking during standstill safer.The more traditional hand brake lever of above-mentioned EPB electronic button takies littler space and more convenient to operate; Above-mentioned ECU ECU 3 can be integrated in the vehicle control syetem; Can adopt micro controller system to constitute; And its forwards, backwards the output signal of caliper unit and instrument display unit 6 can also can transmit through independent control line transmission by means of the vehicle-mounted CAN bus.Above-mentioned front wheel brake pincers unit 4 and trailing wheel caliper unit 5 are after receiving the braking during standstill control signal; Its cooresponding control motor and reducing gear are started working respectively the front and back brake clamp is implemented braking; Accomplish Parking through the braking screw that is contained in the fixing non-self-locking of electric clutch on the brake clamp then; Detailed process is that the rotation of motor is converted into the translation of leading screw when glancing impact of positive turn-off beginning of braking motor, thereby leading screw promotes brake facing until locked; The adhesive electric clutch is accomplished and is kept the Parking state, and in like manner the clamp control of braking to wheel is removed immediately with trailing wheel caliper unit 5 in this front wheel brake pincers unit 4 when receiving the Parking erasing sign.
The controllable function that has in the face of electronic brake system according to the invention down describes:
Electronic brake system of the present invention is the intelligent braking during standstill control system of a kind of brand new; Have automatic parking brake function and manual parking braking function simultaneously concurrently; Wherein the automatic parking brake function comprises: the ramp sails out of controllable function, automatic parking controllable function and the car that slips presss from both sides controllable function again; The manual parking braking function comprises: basic Parking controllable function and urgent parking braking function; Basic Parking controllable function wherein comprises common manual parking braking and braking during standstill cancellation function, and these functions and implementation process thereof are detailed below:
Described manual parking braking function is based on manually to be pushed the EPB electronic button on the EPB button input block 1 and carries out control of braking; When pressing the EPB electronic button; The ECU ECU 3 bases wherein numerical value of braking during standstill zone bit are judged the present residing state of vehicle; When this braking during standstill zone bit is 0; The expression vehicle is in cruising state or Parking state not, this moment the ECU ECU simultaneously forwards, backwards caliper unit send the Parking control signal make before and after caliper unit carry out braking during standstill simultaneously, accomplish the basic manual parking control of vehicle; And ECU ECU 3 also judges through CAN bus signals (like GES) whether vehicle is in motoring condition at this moment simultaneously at this moment; If then on the basis of this basic braking during standstill, further improve the Parking gripping power that is maximum Parking gripping power be provided, come vehicle is carried out urgent braking during standstill, otherwise only carry out basic braking during standstill; And, Parking information is sent to gauge panel is in docked state with the expression vehicle simultaneously with braking during standstill mark position 1.If vehicle itself is in the Parking state when pressing the EPB electronic button; Also be when being 1 o'clock (as behind above-mentioned urgent braking during standstill, then pressing the EPB button once more) with regard to its braking during standstill zone bit; Then the ECU ECU determines whether cancel braking during standstill according to accelerator pedal position information and the ignition lock information that the vehicle-mounted CAN bus transmits; When ignition lock be in open mode and simultaneously Das Gaspedal be in when stepping on down state; Then caliper unit is removed braking during standstill before and after the control of ECU ECU; And simultaneously that the braking during standstill sign is clear 0, and show that on gauge panel vehicle is in the Parking disarm state, accomplish the manual cancellation parking function in the basic Parking control.
Above-mentioned automatic parking brake function is under above-mentioned EPB electronic button is in not down state, by the ECU ECU based on the information of vehicle-mounted CAN bus and to the parking of vehicle, automated intelligent control that the state of sailing out of carries out.That is to say that when chaufeur did not carry out manual parking control to vehicle, the ECU ECU carried out automatic braking during standstill control according to the actual residing state of vehicle to it.The engine speed of learning vehicle is not 0, power-transfer clutch closes, gear is when non-neutral, Das Gaspedal have been stepped on down and brake-pedal travel is 0 simultaneously when the ECU ECU obtains based on the information of CAN bus; The ECU ECU judges that this moment, vehicle was in the state that sails out of of preparing; ECU ECU control motor unclamps the front and back wheel brake clamp automatically; That is to say if the braking during standstill zone bit of vehicle is that caliper unit automatically terminates braking during standstill so that vehicle can sail out of automatically before and after the 1 ECU ECU control at this moment; And simultaneously that the braking during standstill zone bit is clear 0, the automatic guidance function is sailed out of in the ramp when accomplishing vehicle and on the slope, starting to walk.When the ECU ECU based on the information of CAN bus obtain that the engine speed of learning vehicle is 0, the speed of a motor vehicle is 0, ignition lock is in OFF, gear is not stepped on following time for empty, Das Gaspedal; The ECU ECU judges that this moment, vehicle was in docked state; And vehicle is carried out automatic parking control and the car that slips presss from both sides control again according to braking during standstill zone bit information; When this moment braking during standstill be masked as 0 when promptly being in non-braking during standstill state, then caliper unit automatically performs braking during standstill and simultaneously the braking during standstill sign is changed to 1 before and after the control of ECU ECU; If this moment, the braking during standstill sign was not 0; Then the ECU ECU will judge also whether wheel is in rolling condition, if then vehicle is in slippery state, need carries out Parking to it and press from both sides; This moment the ECU ECU forwards, backwards caliper unit send control of braking information once more; Press from both sides control again vehicle is carried out the slide car, guarantee it and park safely, then not need not it is pressed from both sides braking during standstill again if rolling appears in wheel.
The braking during standstill process of utilizing electronic brake system according to the invention vehicle to be implemented automated intelligent is detailed below in conjunction with accompanying drawing 2:
Because electronic brake system of the present invention has automatic parking brake function and manual parking braking function simultaneously; So can implement braking during standstill in all directions to vehicle; Shown in accompanying drawing 2, be pressed following time when detecting the EPB electronic button, the ECU ECU is at first judged vehicle residing state this moment; This judgement realizes through the state value that reads the braking during standstill zone bit in the ECU; When the braking during standstill zone bit was 0, expression this moment, vehicle was in not Parking state, the ECU ECU simultaneously also will through CAN bus signals (like GES) judgement vehicle be in motoring condition at this moment or normally park under not Parking state; If vehicle is in the not Parking state under normally parking; Then the ECU ECU sends the braking during standstill control signal according to the manual parking requirement of this moment to the front and back caliper unit of vehicle simultaneously, comes that vehicle is carried out basic manual parking and brakes, and is in then ECU ECU further Parking gripping power that improves the Parking gripping power that is maximum is provided on the basis of basic braking during standstill of motoring condition if determine vehicle; Come vehicle is carried out urgent braking during standstill; At last the braking during standstill sign is put 1, Parking information is sent to gauge panel is in docked state, therefore through pressing this EPB electronic button with the expression vehicle; ECU can the vehicle of Parking state carries out braking during standstill control to being in not timely; And when this moment, vehicle itself was in motoring condition, the push of this EPB button can be carried out urgent braking during standstill control to vehicle, makes vehicle be in safe docked state.When the state value of pressing its braking during standstill zone bit of EPB electronic button and ECU judgement is 1; The expression vehicle has been in docked state at this moment; Press the EPB electronic button in this case and represent that vehicle sails out of possibly; Need to remove braking during standstill, but accelerator pedal position information and ignition lock information that this moment, the ECU ECU also will combine the vehicle-mounted CAN bus to transmit determines whether really will removing braking during standstill, have only when detecting ignition lock to be in open mode and while Das Gaspedal and to be in when stepping on down state; Caliper unit was removed braking during standstill before and after the ECU ECU was just controlled, otherwise kept the braking during standstill of safety always.ECU is simultaneously with braking during standstill mark position 0 after removing braking during standstill, and shows that on gauge panel vehicle is in the Parking disarm state.Therefore electronic brake system of the present invention replaces traditional hand lever braking and adopts one to control button easily and can realize to the basic Parking control operation of vehicle and to the urgent braking during standstill control of driving vehicle, and easy and simple to handle and control accurately.
Shown in accompanying drawing 2; When the EPB electronic button is in not down state; Electronic brake system according to the invention based on the information of vehicle-mounted CAN bus and to the parking of vehicle, the state of sailing out of carries out automated intelligent control; Detailed process is: at first the ECU ECU based on bus signals judge vehicle whether be in the state that sails out of of preparing (this judgement realizes based on following mode: when the ECU ECU based on the information of CAN bus obtain that the engine speed of learning when vehicle is not 0, power-transfer clutch closes, gear is that then it was in preparation and sails out of state when non-neutral, Das Gaspedal had been stepped on down and the while, brake-pedal travel was 0; Otherwise be not); If judge that obtain vehicle is in and sails out of readiness; Then whether check vehicles then braking during standstill zone bit of ECU ECU itself is 1; If its braking during standstill zone bit is that caliper unit automatically terminates braking during standstill vehicle can be sailed out of automatically before and after the control of 1 ECU ECU, and gauge panel with braking during standstill mark position 0 and before sending corresponding informance to car simultaneously, the automatic guidance that sails out of accomplished to vehicle.
And shown in accompanying drawing 2; When the EPB button is in not down state; The ECU ECU based on bus signals also judge vehicle whether be in docked state (this judgement realizes based on following mode: when the ECU ECU based on the information of CAN bus obtain that the engine speed of learning when vehicle is 0, the speed of a motor vehicle is 0, ignition lock is in OFF, gear is not stepped on following time for empty, Das Gaspedal; The ECU ECU judges that this moment, vehicle was in docked state; Otherwise be not), if judge that this moment, vehicle was in docked state, then the numerical value according to the braking during standstill zone bit presss from both sides control again to the vehicle implementation automatic parking control or the car that slips; When this moment, the braking during standstill zone bit was 0; Show when vehicle is in non-braking during standstill state that caliper unit automatically performs braking during standstill and is 1 with the braking during standstill mark position simultaneously and sends gauge panel before corresponding informance to the car before and after the control of ECU ECU, accomplishes the automatic parking control to vehicle; If this moment the braking during standstill zone bit be not 0 that is vehicle itself be in the Parking state; The ECU ECU will judge also whether wheel is in rolling condition, if then vehicle is in slippery state, need carries out Parking to it and press from both sides; This moment the ECU ECU forwards, backwards caliper unit send control of braking information once more; Press from both sides control again vehicle is carried out the slide car, the slide car of accomplishing vehicle presss from both sides safety control again, then not need not it is pressed from both sides braking during standstill again if rolling appears in wheel.
Electronic brake system of the present invention can provide safety, the control of intelligent braking during standstill as stated, and this electronic brake system and braking during standstill strategy thereof can be applicable to various vehicles, and its application prospect is very extensive.
Below only be that know-why of the present invention and embodiment have been carried out detailed description; But protection scope of the present invention is not limited to this; Any known distortion that those skilled in the art are done in technical conceive scope of the present invention all belongs to category involved in the present invention, and concrete protection domain of the present invention is as the criterion with claims.
Claims (12)
1. electronic brake system; Comprise EPB button input block (1), ECU ECU (3), front and back caliper unit and instrument display unit (6); The input end of wherein said ECU ECU (3) is connected with EPB button input block (1) and vehicle-mounted CAN bus; Caliper unit and instrument display unit (6) before and after the mouth of ECU ECU (3) is connected with; It is characterized in that; Described electronic brake system has automatic parking brake function and manual parking braking function simultaneously concurrently; Wherein said automatic parking brake function comprises: the ramp sails out of controllable function, automatic parking controllable function and the car that slips presss from both sides controllable function again, and said manual parking braking function comprises: basic Parking controllable function and urgent parking braking function, basic Parking controllable function wherein comprise general manual parking braking and braking during standstill cancellation function.
2. electronic brake system according to claim 1; It is characterized in that each function of said electronic brake system is to generate based on the incoming signal of EPB button input block (1) and vehicle-mounted CAN bus through ECU ECU (3) to be used to carry out the various control signals of vehicle braking during standstill and to realize based on caliper unit before and after these control signals controls.
3. electronic brake system according to claim 1 and 2; It is characterized in that; Described manual parking braking function is based on the brake control function of manually pushing the EPB electronic button on the EPB button input block (1) and carrying out; Described automatic parking brake function is under said EPB electronic button is in not down state, by the ECU ECU based on the information of vehicle-mounted CAN bus and to the parking of vehicle, automated intelligent controllable function that the state of sailing out of carries out.
4. electronic brake system according to claim 1 is characterized in that, described EPB button input block (1) directly or through the vehicle-mounted CAN bus connects and ECU ECU (3); Described front and back caliper unit is made up of front wheel brake pincers unit (4) and trailing wheel caliper unit (5) that speed reduction gearing, electric clutch and control motor are housed; The control signal of said ECU ECU (3) output transfers to front wheel brake pincers unit (4) and trailing wheel caliper unit (5) simultaneously, simultaneously vehicle front-wheel and trailing wheel is carried out control of braking by this front wheel brake pincers unit (4) and trailing wheel caliper unit (5) based on same control signal.
5. electronic brake system according to claim 3; It is characterized in that described basic Parking controllable function is included in that vehicle is under the docked state manual parking braking function vehicle carried out by manually pressing the EPB electronic button and is in the braking during standstill cancellation function of by manually pressing the EPB electronic button vehicle being carried out under the braking during standstill state at vehicle; Described urgent parking braking function is when vehicle is in the cruising state, the parking braking function of driving vehicle being carried out by manually pressing the EPB electronic button with maximum Parking gripping power.
6. electronic brake system according to claim 3; It is characterized in that; Described ramp is sailed out of controllable function and is meant at the ECU ECU and knows that based on the information of CAN bus vehicle is in when preparing to sail out of state, automatically terminates braking during standstill so that the function that vehicle can sail out of automatically by caliper unit before and after the control of ECU ECU; Said automatic parking controllable function is meant that when the ECU ECU knows that based on the information of CAN bus vehicle is in docked state the vehicle of braking during standstill state automatically performs the function that braking during standstill is controlled to being in not by the ECU ECU; Said slide car presss from both sides controllable function again and is meant when vehicle under being in the braking during standstill state occur to slide, by the ECU ECU forwards, backwards caliper unit send the function of control of braking once more.
7. electronic brake system according to claim 6; It is characterized in that the said preparation state of sailing out of is meant that the ECU ECU knows that based on the information of CAN bus engine speed when vehicle is not 0, power-transfer clutch closes, gear is the vehicle state of living in when non-neutral, Das Gaspedal have been stepped on down and brake-pedal travel is 0 simultaneously; Said braking during standstill state is identified by the braking during standstill zone bit in the ECU ECU; Said docked state be meant the ECU ECU based on the information of CAN bus know that engine speed when vehicle is 0, the speed of a motor vehicle is 0, ignition lock is in OFF, gear is the vehicle state of living in that sky and Das Gaspedal are not stepped on following time.
8. one kind is used each described electronic brake system of claim 1-7 to the method that vehicle carries out Parking control, it is characterized in that said method comprises following process:
(1), the EPB electronic button that detects in the EPB button input block (1) when the ECU ECU is pressed following time; The ECU ECU judges automatically whether vehicle is in the state of Parking; If vehicle is in not Parking state; Then the ECU ECU judges that further vehicle is in docked state or motoring condition; When vehicle be in docked state then the ECU ECU vehicle is carried out common manual parking braking, when vehicle be in motoring condition then the ECU ECU vehicle is carried out urgent braking during standstill with maximum Parking gripping power; When if vehicle is in the Parking state at the EPB electronic button when depressing, then caliper unit is in open mode and Das Gaspedal at ignition lock and is in and removes braking during standstill when stepping on down state before and after the control of ECU ECU;
(2), when the EPB electronic button is in not down state; Then the ECU ECU judges that based on bus signals vehicle is in preparation and sails out of state or docked state; If be in the state that sails out of of preparing, then automatically terminate braking during standstill so that vehicle can sail out of automatically by caliper unit before and after the control of ECU ECU; If this moment, vehicle was in docked state; The ECU ECU judges further this moment, whether vehicle carried out braking during standstill; Then by the ECU ECU it is not automatically performed braking during standstill control if carry out braking during standstill, if carried out braking during standstill, then the ECU ECU judges further also whether the wheel of vehicle this moment is in rolling, sliding mode; If then by the ECU ECU forwards, backwards caliper unit send brake control signal once more, press from both sides control again vehicle carry out is slipped car.
9. method according to claim 8; It is characterized in that; The numerical value that the judgement that wherein whether is in the Parking state about vehicle is based on the braking during standstill zone bit in the ECU ECU carries out, and when the braking during standstill zone bit was 1, the expression vehicle was in the braking during standstill state; When zone bit was 0, the expression vehicle was in not braking during standstill state; Wherein said docked state be meant the ECU ECU based on the information of CAN bus know that engine speed when vehicle is 0, the speed of a motor vehicle is 0, ignition lock is in OFF, gear is the vehicle state of living in that sky and Das Gaspedal are not stepped on following time; The wherein said preparation state of sailing out of be meant the ECU ECU based on the information of CAN bus know that engine speed when vehicle is not 0, power-transfer clutch closes, gear is that non-neutral, Das Gaspedal have been stepped on down and the vehicle of living in state of brake-pedal travel when being 0.
10. according to Claim 8 or 9 described methods, it is characterized in that the concrete execution flow process of said method is: detect the EPB electronic button and whether be pressed down, if then carry out following steps (1), otherwise execution following steps (2), wherein:
Step (1): whether ECU ECU inspection braking during standstill zone bit is 1, if then carry out the a1 step, otherwise carries out the b1 step:
Wherein the a1 step comprises: judge whether ignition lock is opened; If whether then further judge Das Gaspedal steps on down; If then remove braking during standstill; With braking during standstill mark position 0, withdraw from then simultaneously, if wherein ignition lock is not opened or Das Gaspedal is not stepped on and nextly do not removed braking during standstill and directly withdraw from;
Wherein the b1 step comprises: judge that vehicle is in docked state or motoring condition; If being in docked state, vehicle then vehicle is carried out common braking during standstill; And with braking during standstill mark position 1; If vehicle is in motoring condition and then vehicle is carried out urgent braking during standstill, and with braking during standstill mark position 1;
Step (2): the ECU ECU judges that based on bus signals vehicle is in preparation and sails out of state or docked state:
Wherein, check further then whether the braking during standstill zone bit is 1 if vehicle is in to be prepared to sail out of state, if then control front and back caliper unit automatically terminates braking during standstill, and with braking during standstill mark position 0;
Wherein if vehicle is in docked state; Check further then whether the braking during standstill zone bit is 0; If then caliper unit is carried out braking during standstill before and after the control, and with braking during standstill mark position 1, if the braking during standstill zone bit is not 0; Whether the wheel of then further judging vehicle this moment is in rollings, sliding mode, if then forwards, backwards caliper unit send brake control signal once more and press from both sides control again vehicle is carried out the slide car.
11. method according to claim 10; It is characterized in that said each implementation is to generate based on the incoming signal of EPB button input block (1) and vehicle-mounted CAN bus through ECU ECU (3) to be used to carry out the various control signals of vehicle braking during standstill and based on these control signals the front and back caliper unit is carried out corresponding control and realize.
12. according to claim 10 or 11 described methods; It is characterized in that; Said ECU ECU simultaneously with cooresponding braking during standstill information or Parking cancellation information is sent to display instrument unit, with online demonstration vehicle residing state with braking during standstill mark position 1 or put at 0 o'clock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110322691 CN102416934B (en) | 2011-10-21 | 2011-10-21 | Electrical park brake (EPB) system and park control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110322691 CN102416934B (en) | 2011-10-21 | 2011-10-21 | Electrical park brake (EPB) system and park control method |
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| CN102416934A true CN102416934A (en) | 2012-04-18 |
| CN102416934B CN102416934B (en) | 2013-11-06 |
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| CN 201110322691 Active CN102416934B (en) | 2011-10-21 | 2011-10-21 | Electrical park brake (EPB) system and park control method |
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