CN102416934B - 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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- CN102416934B CN102416934B CN 201110322691 CN201110322691A CN102416934B CN 102416934 B CN102416934 B CN 102416934B CN 201110322691 CN201110322691 CN 201110322691 CN 201110322691 A CN201110322691 A CN 201110322691A CN 102416934 B CN102416934 B CN 102416934B
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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 in particular a kind of electronic brake system based on the brake-by-wire technology and Parking control method thereof.
Background technology
The braking during standstill tradition of automobile is to rely on the mechanical type parking brake to carry out braking during standstill, it is very inconvenient that this traditional mechanical type parking brake braking during standstill uses, and the strength size of different chaufeurs is different, the braking during standstill of parking brake parking vehicle brake lever may be different to the practical function of braking force thus, 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 now increasing automobile control element to control from traditional machinery and gradually becomes electronic type control, electronic brake system is to realize the function of traditional emergency brake system with electric energy, existing electronic brake system is to replace traditional hand-braking and vehicle is carried out provisional braking mostly, namely traditional braking during standstill mode that pulls parking vehicle brake lever is replaced with hand by the braking during standstill mode of braking during standstill button, easier with respect to its operation to braking during standstill of traditional parking brake, but the function of existing this electronic brake system and the function of traditional hand-braking are similar, function is relatively simple and can not the automatic parking brake control except manually controlling to vehicle, therefore its intellectuality is lower, and existing electronic brake system is the same with parking brake, do not adopt and the integrated technology of front and back brake clamp, its braking safety is lower, therefore function and the performance of electronic parking of the prior art system remain further to improve to be fit to the vehicular drive demand of greater security and simple operation.
Summary of the invention
The present invention is based on above-mentioned technical matters and propose, namely the invention provides a kind of intelligent electronic emergency brake system (EPB:Electrical Park Brake) and strategy that has simultaneously manual parking braking function and automatic parking brake function, its with the provisional braking in the driving process and the long time property braking function after stopping combine, and employing and the integrated EPB technology of front and back brake clamp, improved greatly safety, the convenience and intelligent of braking during standstill.
The present invention solves the problems of the technologies described above the technical scheme of taking:
a kind of electronic brake system, comprise EPB button input block 1, ECU ECU (Electrical Control Unit) 3, front and back caliper unit and instrument display unit 6, the input end of wherein said ECU ECU (Electrical Control Unit) 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 (Electrical Control Unit) 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 control function is sailed out of in the ramp, automatic parking controls function and the car that slips presss from both sides the control function again, described manual parking braking function comprises: function and urgent parking braking function are controlled in basic Parking, basic Parking is wherein controlled function and is comprised general manual parking braking and braking during standstill cancellation function.
Further in such scheme of the present invention, each function of described electronic brake system is generate be used to the various control signals that carry out vehicle parking and control the front and back caliper unit based on these control signals and realize by the incoming signal of ECU ECU (Electrical Control Unit) 3 based on EPB button input block 1 and vehicle-mounted CAN bus.
Further in such scheme of the present invention, described manual parking braking function is based on the EPB electronic button on Manual press EPB button input block 1 and the brake control function that carries out, described automatic parking brake function is under described EPB electronic button is in not down state, based on the information of vehicle-mounted CAN bus, the parking of vehicle, automated intelligent that the state of sailing out of carries out is controlled function by the ECU ECU (Electrical Control Unit).
Further in such scheme of the present invention, described EPB button input block 1 directly or connect and ECU ECU (Electrical Control Unit) 3 by the vehicle-mounted CAN bus; Described front and back caliper unit is comprised 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 described ECU ECU (Electrical Control Unit) 3 outputs transfers to front wheel brake pincers unit 4 and trailing wheel caliper unit 5 simultaneously, simultaneously front-wheel and the trailing wheel of vehicle is braked control by this front wheel brake pincers unit 4 and trailing wheel caliper unit 5 based on same control signal.
Further in such scheme of the present invention, described basic Parking control function is included in vehicle and is in the manual parking braking function of by manually pressing the EPB electronic button, vehicle being carried out under 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 normal motoring condition, the parking braking function with maximum Parking gripping power of driving vehicle being carried out by manually pressing the EPB electronic button.
Further in such scheme of the present invention, described ramp is sailed out of the control function and is referred to know based on the information of CAN bus in the ECU ECU (Electrical Control Unit) that vehicle is in when preparing to sail out of state, and before and after being controlled by the ECU ECU (Electrical Control Unit), caliper unit automatically terminates braking during standstill so that the function that vehicle can sail out of automatically; Described automatic parking is controlled function and is referred to when the ECU ECU (Electrical Control Unit) knows that based on the information of CAN bus vehicle is in docked state, and 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 (Electrical Control Unit); The described car that slips presss from both sides when controlling function and referring to that sliding appears in vehicle when being in the braking during standstill state under again, by the ECU ECU (Electrical Control Unit) forwards, backwards caliper unit again send the function of braking control.
Further in such scheme of the present invention, the described preparation state of sailing out of refers to that the ECU ECU (Electrical Control Unit) knows that based on the information of CAN bus engine speed when vehicle is not 0, power-transfer clutch closes, gear is the vehicle status when non-neutral, Das Gaspedal have depressed and brake-pedal travel is 0 simultaneously; Described braking during standstill state is identified by the braking during standstill zone bit in the ECU ECU (Electrical Control Unit); Described docked state refer to the ECU ECU (Electrical Control Unit) 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 sky and the Das Gaspedal vehicle status when not depressing.
Further the invention provides and a kind ofly use electronic brake system described in technique scheme to carry out to vehicle the method that Parking is controlled, it is characterized in that described method comprises following process:
(1), the EPB electronic button that detects in EPB button input block 1 when the ECU ECU (Electrical Control Unit) is pressed lower time, whether ECU ECU (Electrical Control Unit) automatic decision vehicle is in the state of Parking, if vehicle is in not Parking state, the ECU ECU (Electrical Control Unit) judges that further vehicle is in docked state or motoring condition, when vehicle be in docked state the ECU ECU (Electrical Control Unit) vehicle is carried out common manual parking braking, when vehicle be in motoring condition the ECU ECU (Electrical Control Unit) vehicle is carried out the urgent braking during standstill with maximum Parking gripping power; When if vehicle is in the Parking state at the EPB electronic button when depressing, before and after the ECU ECU (Electrical Control Unit) is controlled, caliper unit is in open mode and Das Gaspedal at ignition lock and is in and removes braking during standstill when depressing state;
(2), when the EPB electronic button is in not down state, the ECU ECU (Electrical Control Unit) is in based on bus signals judgement vehicle and prepares to sail out of state or docked state, if be in the state that sails out of of preparing, before and after being controlled by the ECU ECU (Electrical Control Unit), caliper unit automatically terminates braking during standstill so that vehicle can sail out of automatically; If this moment, vehicle was in docked state, the ECU ECU (Electrical Control Unit) judges further this moment, whether vehicle carried out braking during standstill, by the ECU ECU (Electrical Control Unit), it is not automatically performed braking during standstill control if carry out braking during standstill, if carried out braking during standstill, the ECU ECU (Electrical Control Unit) judges further also whether the wheel of vehicle this moment is in rolling, sliding mode, if by the ECU ECU (Electrical Control Unit) forwards, backwards caliper unit again send brake control signal, slip car and press from both sides again control so that vehicle is carried out.
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 (Electrical Control Unit) carries out, when the braking during standstill zone bit is 1, the expression vehicle is 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 refer to the ECU ECU (Electrical Control Unit) 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 sky and the Das Gaspedal vehicle status when not depressing; The wherein said preparation state of sailing out of refer to the ECU ECU (Electrical Control Unit) 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 depressed and the vehicle status of brake-pedal travel when being 0.
Further in said method of the present invention, the concrete execution flow process of described method is: detect the EPB electronic button and whether be pressed down, if carry out following steps (1), otherwise carry out following steps (2), wherein:
Step (1): the ECU ECU (Electrical Control Unit) checks whether the braking during standstill zone bit is 1, if carry out the a1 step, otherwise carries out the b1 step:
Wherein the a1 step comprises: judge whether ignition lock is opened, if judge further whether Das Gaspedal depresses, if remove braking during standstill, simultaneously with braking during standstill mark position 0, then withdraw from, if ignition lock is not wherein opened or Das Gaspedal does not depress and do not remove braking during standstill and directly withdraw from;
Wherein the b1 step comprises: the judgement vehicle is in docked state or motoring condition, if being in docked state, vehicle vehicle is carried out common braking during standstill, and with braking during standstill mark position 1, if being in motoring condition, vehicle vehicle is carried out urgent braking during standstill, and with braking during standstill mark position 1;
Step (2): the ECU ECU (Electrical Control Unit) is in based on bus signals judgement vehicle prepares to sail out of state or docked state:
If wherein vehicle is in and prepares to sail out of state, check further whether the braking during standstill zone bit is 1, if before and after controlling, caliper unit automatically terminates braking during standstill, and with braking during standstill mark position 0;
If wherein vehicle is in docked state, check further whether the braking during standstill zone bit is 0, if before and after controlling, caliper unit is carried out braking during standstill, and with braking during standstill mark position 1, if the braking during standstill zone bit is not 0, further whether the wheel of judgement vehicle this moment is in rollings, sliding mode, if forwards, backwards caliper unit again send brake control signal with to vehicle execution slip car and press from both sides again control.
Further in said method of the present invention, described each implementation is generate be used to the various control signals that carry out vehicle parking and based on these control signals, the front and back caliper unit carried out corresponding control and realize by the incoming signal of ECU ECU (Electrical Control Unit) 3 based on EPB button input block 1 and vehicle-mounted CAN bus.
Further in said method of the present invention, described ECU ECU (Electrical Control Unit) is with braking during standstill mark position 1 or when setting to 0, and simultaneously the braking during standstill information of correspondence or Parking cancellation information is sent to the display instrument unit, with the residing state of online demonstration vehicle.
The technique effect that the present invention will reach:
Electronic brake system of the present invention is by adopting an electronic button within reach to replace the conventional manual parking vehicle brake lever, not only reserve more space in the compartment, the more important thing is and make the chaufeur parking vehicle brake lever that pulls the hand brake of needn't requiring great effort, simply laborsaving, greatly improved 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 simultaneously manual parking braking and automatic parking brake function, make parking, braking, starting, sail out of etc. all in the direct indication of EPB system with under automatically controlling and carry out, can intelligence apply braking during standstill, and can apply maximum fixedly Parking gripping power to guarantee can not slip car, and shortened the response time of braking during standstill, and by adopting the safety that has further improved braking during standstill with the integrated EPB technology of front and back brake clamp.
Therefore electronic brake system of the present invention has all advanced major step than the long-term traditional hand braking during standstill pattern of using and existing electronic parking system.
Description of drawings
Fig. 1 is the structure principle chart of electronic brake system of the present invention;
Fig. 2 is the Parking control flow chart that uses electronic brake system of the present invention that vehicle is carried out, that is the working process of electronic brake system of the present invention.
The specific embodiment
The below contrasts accompanying drawing, the specific embodiment of the present invention is described in further detail, helping those skilled in the art to inventive concept of the present invention, technical scheme, more complete, accurate and deep understanding to be arranged, 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 controls each braking working process based on M/C signal and the vehicle-mounted CAN bus signals of electronic button by ECU ECU (Electrical Control Unit) wherein.
as shown in Figure 1, electronic brake system of the present invention comprises EPB button input block 1, ECU ECU (Electrical Control Unit) 3, front and back caliper unit and instrument display unit 6, wherein be provided with the EPB electronic button on EPB button input block 1, be used for manually opened braking during standstill, the incoming signal of this EPB button input block 1 can directly transfer to ECU ECU (Electrical Control Unit) 3, also can transfer to ECU ECU (Electrical Control Unit) 3 by the vehicle-mounted CAN bus, this ECU ECU (Electrical Control Unit) 3 is connected in EPB button input block 1 and vehicle-mounted CAN bus simultaneously, and based on the incoming signal of EPB button input block 1 and vehicle-mounted CAN bus and generate be used to the control signal that carries out vehicle parking, the automated intelligent Parking control signal of system of the present invention is realized by this ECU ECU (Electrical Control Unit) 3, caliper unit and instrument display unit 6 before and after the mouth of this ECU ECU (Electrical Control Unit) 3 is connected with, be used for the control signal of caliper unit output forwards, backwards, and to the instrument display unit 6 residing status signals of output vehicle.described front and back caliper unit is by speed reduction gearing is housed, front wheel brake pincers unit 4 and the trailing wheel caliper unit 5 of electric clutch and control motor form, this front wheel brake pincers unit 4 and trailing wheel caliper unit 5 are respectively used to control the braking during standstill of vehicle front-wheel and trailing wheel, brake clamp integrated EPB technology in front and back of the present invention refers to that the control signal of ECU ECU (Electrical Control Unit) 3 outputs transfers to front wheel brake pincers unit 4 and trailing wheel caliper unit 5 simultaneously, simultaneously front-wheel and the trailing wheel of vehicle are braked control by this front wheel brake pincers unit 4 and trailing wheel caliper unit 5 based on same control signal, technology with respect to existing only trailing wheel braking has further improved indicating brake action, make braking during standstill safer.The more traditional hand brake lever of above-mentioned EPB electronic button takies less space and more convenient to operate, above-mentioned ECU ECU (Electrical Control Unit) 3 can be integrated in vehicle control syetem, can adopt micro controller system to consist of, and its forwards, backwards the output signal of caliper unit and instrument display unit 6 can by independent control line transmission, also can transmit 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, the control motor of its correspondence and reducing gear start working respectively the front and back brake clamp is implemented braking, then complete Parking by the braking screw that is contained in the fixing non-self-locking of electric clutch on brake clamp, detailed process is when the braking motor forward begins to brake, the rotation of motor is converted into the translation of leading screw, thereby leading screw promotes brake facing until locked, the adhesive electric clutch is completed and is kept the Parking state, in like manner this front wheel brake pincers unit 4 and trailing wheel caliper unit 5 are removed immediately when receiving the Parking erasing sign clamp braking of wheel are controlled.
The below describes the control function that electronic brake system of the present invention has:
Electronic brake system of the present invention is a kind of brand-new intelligent braking during standstill control system, have simultaneously automatic parking brake function and manual parking braking function concurrently, wherein the automatic parking brake function comprises: the control function is sailed out of in the ramp, automatic parking controls function and the car that slips presss from both sides the control function again, the manual parking braking function comprises: function and urgent parking braking function are controlled in basic Parking, basic Parking is wherein controlled function and is comprised common manual parking braking and braking during standstill cancellation function, and the below describes these functions and implementation process thereof in detail:
described manual parking braking function is based on the EPB electronic button on Manual press EPB button input block 1 and brakes control, when pressing the EPB electronic button, ECU ECU (Electrical Control Unit) 3 bases are the present residing state of numerical value judgement vehicle of braking during standstill zone bit wherein, when this braking during standstill zone bit is 0, the expression vehicle is in normal motoring condition or Parking state not, this moment the ECU ECU (Electrical Control Unit) simultaneously forwards, backwards caliper unit send the Parking control signal make before and after caliper unit carry out simultaneously braking during standstill, completing the basic manual parking of vehicle controls, and ECU ECU (Electrical Control Unit) 3 also judges by CAN bus signals (as vehicle speed signal) whether vehicle is in motoring condition at this moment simultaneously at this moment, if further improve the Parking gripping power that is maximum Parking gripping power is provided on the basis of this basic braking during standstill, come vehicle is carried out urgent braking during standstill, otherwise only carry out basic braking during standstill, and simultaneously with braking during standstill mark position 1, Parking information is sent to gauge panel is in docked state with the expression vehicle.if vehicle itself is in the Parking state when pressing the EPB electronic button, also when being (as then again press the EPB button after above-mentioned urgent braking during standstill) at 1 o'clock with regard to its braking during standstill zone bit, the ECU ECU (Electrical Control Unit) 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 depressing state, before and after the ECU ECU (Electrical Control Unit) is controlled, caliper unit is removed braking during standstill, and simultaneously with braking during standstill sign clear 0, and show that on gauge panel vehicle is in the Parking disarm state, complete the manual cancellation parking function in basic Parking control.
Above-mentioned automatic parking brake function is under above-mentioned EPB electronic button is in not down state, the parking of vehicle, automated intelligent that the state of sailing out of carries out is controlled based on the information of vehicle-mounted CAN bus by the ECU ECU (Electrical Control Unit).That is to say that the ECU ECU (Electrical Control Unit) is carried out automatic braking during standstill to it and controlled according to the vehicle residing state of reality when chaufeur does not carry out manual parking control to vehicle.when the ECU ECU (Electrical Control Unit) learns that based on the acquisition of information of CAN bus the engine speed of vehicle is not 0, power-transfer clutch closes, gear is non-neutral, Das Gaspedal has depressed and the while brake-pedal travel is 0 o'clock, the ECU ECU (Electrical Control Unit) judges that this moment, vehicle was in the state that sails out of of preparing, the ECU ECU (Electrical Control Unit) is controlled motor unclamps the front and back wheel brake clamp automatically, if that is to say that the braking during standstill zone bit of vehicle this moment is that before and after 1 ECU ECU (Electrical Control Unit) is controlled, caliper unit automatically terminates braking during standstill so that vehicle can sail out of automatically, and simultaneously with braking during standstill zone bit clear 0, automatic control function is sailed out of in ramp when completing vehicle and starting to walk on the slope.When the ECU ECU (Electrical Control Unit) based on the acquisition of information of CAN bus learn that the engine speed of vehicle is 0, the speed of a motor vehicle is 0, ignition lock is in OFF, gear for empty, when Das Gaspedal does not depress, ECU ECU (Electrical Control Unit) judgement vehicle this moment is in docked state, and according to braking during standstill zone bit information, control is pressed from both sides in vehicle implementation automatic parking control and the car that slips again, when this moment braking during standstill be masked as 0 when namely being in non-braking during standstill state, before and after the ECU ECU (Electrical Control Unit) is controlled, caliper unit automatically performs braking during standstill and simultaneously the braking during standstill sign is set to 1; If this moment, the braking during standstill sign was not 0, the ECU ECU (Electrical Control Unit) will judge also whether wheel is in rolling condition, if vehicle is in slippery state, need to carry out Parking to it presss from both sides again, this moment the ECU ECU (Electrical Control Unit) forwards, backwards caliper unit again send the braking control information, slip car and press from both sides again control so that vehicle is carried out, to guarantee that its safe stopping stays, not need not it is pressed from both sides braking during standstill again if rolling appears in wheel.
Describing in detail below in conjunction with accompanying drawing 2 utilizes electronic brake system of the present invention vehicle to be implemented the braking during standstill process of automated intelligent:
because electronic brake system of the present invention has automatic parking brake function and manual parking braking function simultaneously, so can be to vehicle enforcement braking during standstill in all directions, as shown in Figure 2, be pressed lower time when the EPB electronic button being detected, at first the ECU ECU (Electrical Control Unit) judges vehicle residing state this moment, this judgement realizes by the state value that reads the braking during standstill zone bit in ECU (Electrical Control Unit), when the braking during standstill zone bit is 0, expression vehicle this moment is in not Parking state, the ECU ECU (Electrical Control Unit) simultaneously also will by CAN bus signals (as vehicle speed signal) judgement vehicle be at this moment motoring condition or normally park under not Parking state, the not Parking state under if vehicle is in and normally parks, the ECU ECU (Electrical Control Unit) requires the front and back caliper unit of vehicle is sent the braking during standstill control signal simultaneously according to the manual parking of this moment, come vehicle is carried out basic manual parking braking, be in ECU ECU (Electrical Control Unit) 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 with the expression vehicle, therefore by pressing this EPB electronic button, ECU (Electrical Control Unit) 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 to vehicle and control, make vehicle be in safe docked state.when the state value of pressing EPB electronic button and ECU (Electrical Control Unit) and judge its braking during standstill zone bit is 1, the expression vehicle has been in docked state at this moment, press in this case the EPB electronic button and represent that vehicle sails out of possibly, need to remove braking during standstill, but this moment, the ECU ECU (Electrical Control Unit) also will determine whether really will removing braking during standstill in conjunction with accelerator pedal position information and the ignition lock information that the vehicle-mounted CAN bus transmits, only have when detect ignition lock be in open mode and simultaneously Das Gaspedal be in when depressing state, before and after the ECU ECU (Electrical Control Unit) is just controlled, caliper unit is removed braking during standstill, otherwise the braking during standstill that always keeps safety.ECU (Electrical Control Unit) 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 easily button and can realize the basic Parking control operation of vehicle and the urgent braking during standstill of driving vehicle is controlled, and is easy and simple to handle and control accurately.
as shown in Figure 2, when the EPB electronic button is in not down state, electronic brake system of the present invention is based on the information of vehicle-mounted CAN bus and parking vehicle, the state of sailing out of carries out automated intelligent and controls, detailed process is: at first the ECU ECU (Electrical Control Unit) judges whether be in the state that sails out of of preparing by vehicle (this judgement realizes based on following mode: when the ECU ECU (Electrical Control Unit) learns that based on the acquisition of information of CAN bus the engine speed when vehicle is not 0 based on bus signals, power-transfer clutch closes, gear is non-neutral, Das Gaspedal depressed and simultaneously brake-pedal travel be that it was in the state that sails out of of preparing in 0 o'clock, otherwise be not), be in and sail out of readiness if judgement obtains vehicle, whether then check vehicles braking during standstill zone bit of ECU ECU (Electrical Control Unit) itself is 1, if its braking during standstill zone bit is 1 ECU ECU (Electrical Control Unit) control before and after caliper unit automatically terminate braking during standstill vehicle can be sailed out of automatically, and simultaneously with braking during standstill mark position 0 and send corresponding informance gauge panel to the car, complete the automatic control of sailing out of of vehicle.
and as shown in Figure 2, when the EPB button is in not down state, the ECU ECU (Electrical Control Unit) also judges whether be in docked state by vehicle (this judgement realizes based on following mode: when the ECU ECU (Electrical Control Unit) learns that based on the acquisition of information of CAN bus the engine speed when vehicle is 0 based on bus signals, the speed of a motor vehicle is 0, ignition lock is in OFF, gear is empty, when Das Gaspedal does not depress, ECU ECU (Electrical Control Unit) judgement vehicle this moment is in docked state, otherwise be not), if judge that this moment, vehicle was in docked state, the numerical value according to the braking during standstill zone bit presss from both sides control again to 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, before and after the ECU ECU (Electrical Control Unit) is controlled, caliper unit automatically performs braking during standstill and is 1 simultaneously with the braking during standstill mark position and sends corresponding informance gauge panel to the car, complete the automatic parking of vehicle is controlled, if this moment the braking during standstill zone bit be not 0 that is vehicle itself be in the Parking state, the ECU ECU (Electrical Control Unit) will judge also whether wheel is in rolling condition, if vehicle is in slippery state, need to carry out Parking to it presss from both sides again, this moment the ECU ECU (Electrical Control Unit) forwards, backwards caliper unit again send the braking control information, slip car and press from both sides control again so that vehicle is carried out, the car that slips of completing vehicle presss from both sides safety control again, 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, intelligent braking during standstill to control as mentioned above, and this electronic brake system and braking during standstill strategy thereof can be applicable to various vehicles, and its application prospect is very extensive.
Only below that know-why of the present invention and embodiment are described in detail; but protection scope of the present invention is not limited to this; the any known distortion that those skilled in the art do 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 (6)
1. one kind is carried out to vehicle the method that Parking is controlled based on electronic brake system, described electronic brake system comprises: EPB button input block (1), ECU ECU (Electrical Control Unit) (3), front and back caliper unit and instrument display unit (6), the input end of wherein said ECU ECU (Electrical Control Unit) (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 (Electrical Control Unit) (3) is connected with, described electronic brake system has automatic parking brake function and manual parking braking function simultaneously concurrently, wherein said automatic parking brake function comprises: the control function is sailed out of in the ramp, automatic parking controls function and the car that slips presss from both sides the control function again, described manual parking braking function comprises: function and urgent parking braking function are controlled in basic Parking, basic Parking is wherein controlled function and is comprised common manual parking braking and braking during standstill removing function, it is characterized in that, described method comprises following process:
(1), the EPB electronic button that detects in EPB button input block (1) when ECU ECU (Electrical Control Unit) (3) is pressed lower time, whether ECU ECU (Electrical Control Unit) (3) automatic decision vehicle is in the state of Parking, if vehicle is in not Parking state, ECU ECU (Electrical Control Unit) (3) judges that further vehicle is in docked state or motoring condition, when vehicle is in ECU ECU (Electrical Control Unit) (3) the manual parking braking common to the vehicle execution of docked state, when vehicle be in motoring condition ECU ECU (Electrical Control Unit) (3) vehicle is carried out the urgent braking during standstill with maximum Parking gripping power, when if vehicle is in the Parking state at the EPB electronic button when depressing, before and after ECU ECU (Electrical Control Unit) (3) is controlled, caliper unit is in open mode and Das Gaspedal at ignition lock and is in and removes braking during standstill when depressing state,
(2), when the EPB electronic button is in not down state, ECU ECU (Electrical Control Unit) (3) is in based on bus signals judgement vehicle and prepares to sail out of state or docked state, if be in the state that sails out of of preparing, before and after being controlled by ECU ECU (Electrical Control Unit) (3), caliper unit automatically terminates braking during standstill so that vehicle can sail out of automatically; If this moment, vehicle was in docked state, whether ECU ECU (Electrical Control Unit) (3) further judgement vehicle this moment has carried out braking during standstill, by ECU ECU (Electrical Control Unit) (3), it is not automatically performed braking during standstill control if carry out braking during standstill, if carried out braking during standstill, ECU ECU (Electrical Control Unit) (3) judges further also whether the wheel of vehicle this moment is in rolling or sliding mode, if by ECU ECU (Electrical Control Unit) (3) forwards, backwards caliper unit again send brake control signal, slip car and press from both sides again control so that vehicle is carried out.
2. method according to claim 1, 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 (Electrical Control Unit) carries out, when the braking during standstill zone bit is 1, the expression vehicle is in the braking during standstill state, when the braking during standstill zone bit was 0, the expression vehicle was in not braking during standstill state; Wherein said docked state refer to the ECU ECU (Electrical Control Unit) 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 sky and the Das Gaspedal vehicle status when not depressing; The wherein said preparation state of sailing out of refer to the ECU ECU (Electrical Control Unit) 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 depressed and the vehicle status of brake-pedal travel when being 0.
3. method according to claim 1 and 2 is characterized in that the concrete execution flow process of described method is: detects the EPB electronic button and whether is pressed down, if carry out following steps (1), otherwise carry out following steps (2), wherein:
Step (1): the ECU ECU (Electrical Control Unit) checks whether the braking during standstill zone bit is 1, if carry out the a1 step, otherwise carries out the b1 step:
Wherein the a1 step comprises: judge whether ignition lock is opened, if judge further whether Das Gaspedal depresses, if remove braking during standstill, simultaneously with braking during standstill mark position 0, then withdraw from, if ignition lock is not wherein opened or Das Gaspedal does not depress and do not remove braking during standstill and directly withdraw from;
Wherein the b1 step comprises: the judgement vehicle is in docked state or motoring condition, if being in docked state, vehicle vehicle is carried out common braking during standstill, and with braking during standstill mark position 1, if being in motoring condition, vehicle vehicle is carried out urgent braking during standstill, and with braking during standstill mark position 1;
Step (2): the ECU ECU (Electrical Control Unit) is in based on bus signals judgement vehicle prepares to sail out of state or docked state:
If wherein vehicle is in and prepares to sail out of state, check further whether the braking during standstill zone bit is 1, if before and after controlling, caliper unit automatically terminates braking during standstill, and with braking during standstill mark position 0;
If wherein vehicle is in docked state, check further whether the braking during standstill zone bit is 0, if before and after controlling, caliper unit is carried out braking during standstill, and with braking during standstill mark position 1, if the braking during standstill zone bit is not 0, further whether the wheel of judgement vehicle this moment is in and rolls or sliding mode, if forwards, backwards caliper unit again send brake control signal and slip car and press from both sides again control so that vehicle is carried out.
4. method according to claim 3, it is characterized in that, described each implementation is generate be used to the various control signals that carry out vehicle parking and based on these control signals, the front and back caliper unit carried out corresponding control and realize by the incoming signal of ECU ECU (Electrical Control Unit) (3) based on EPB button input block (1) and vehicle-mounted CAN bus.
5. method according to claim 3, it is characterized in that, described ECU ECU (Electrical Control Unit) is with braking during standstill mark position 1 or when setting to 0, and braking during standstill information or the Parking releasing information with correspondence is sent to the instrument display unit simultaneously, with the residing state of online demonstration vehicle.
6. method according to claim 1, is characterized in that, described EPB button input block (1) is direct or be connected in ECU ECU (Electrical Control Unit) (3) by the vehicle-mounted CAN bus; Described front and back caliper unit is comprised 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 described ECU ECU (Electrical Control Unit) (3) output transfers to front wheel brake pincers unit (4) and trailing wheel caliper unit (5) simultaneously, simultaneously front-wheel and the trailing wheel of vehicle is braked control by this front wheel brake pincers unit (4) and trailing wheel caliper unit (5) based on same control signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110322691 CN102416934B (en) | 2011-10-21 | 2011-10-21 | Electrical park brake (EPB) system and park control method |
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| CN 201110322691 CN102416934B (en) | 2011-10-21 | 2011-10-21 | Electrical park brake (EPB) system and park control method |
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| CN102416934B true CN102416934B (en) | 2013-11-06 |
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