CN103879397B - The brake switch failure judgment method of vehicle and device - Google Patents
The brake switch failure judgment method of vehicle and device Download PDFInfo
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- CN103879397B CN103879397B CN201210560800.XA CN201210560800A CN103879397B CN 103879397 B CN103879397 B CN 103879397B CN 201210560800 A CN201210560800 A CN 201210560800A CN 103879397 B CN103879397 B CN 103879397B
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Abstract
The invention discloses a kind of brake switch failure judgment method of vehicle, comprise step: S1: the main switch analog signal and the auxiliary switch analog signal that detect the brake switch of vehicle; S2: digitized processing is carried out to generate corresponding main switch digital quantity and auxiliary switch digital quantity to main switch analog signal and auxiliary switch analog signal; S3: main switch digital quantity and auxiliary switch digital quantity are analyzed, when main switch digital quantity and auxiliary switch digital quantity are true time, judge brake switch fault, when main switch digital quantity and auxiliary switch digital quantity are fictitious time, judge brake switch safety, when main switch digital quantity and auxiliary switch digital quantity inconsistent time, cycle of run starts timing, and when timing is to pre-determined threshold, detection main switch digital quantity and auxiliary switch digital quantity still keep inconsistent, then judge that brake switch fault is permanent fault.The method makes vehicle reduce the occurrence rate of fault to the full extent, also ensure that the safety performance of driving simultaneously, and has accuracy and applicability.
Description
Technical field
The present invention relates to technical field of vehicle control, particularly a kind of brake switch failure judgment method of vehicle and device.
Background technology
Along with electronlmobil is growing, modern automobile electronic control system is more and more complicated, wants the position of failure judgement just more difficult when a failure occurs it.In electronic control system, generally all there is fault self-diagnosis function, when overhauling vehicle, by means of the diagnostics interface (socket) of electronic control unit ECU, by specific program, with the method for artificial cross-over connection or operational failure diagnostic equipment (ticking demoder also known as Computerized tester or electricity), failure code in electronic control unit ECU memory device can be recalled, and in the mode of light flash or directly shown in digital form by diagnostic equipment read-out, thus maintainer is helped to correctly judge fast the type of fault and scope.
In general, adopt a path switching signal amount to judge the driving demand of chaufeur to Some vehicles, after namely collecting the incoming signal of brake switch, just light brake lamp, and request braking kill signal is input to controller, this mode simple possible.But in current not overripened mode and the driving safety needs of problems that day by day increases, this can not meet current driving performance demand and personal safety ensures, the direct application of trouble diagnosing on electronlmobil of some orthodox cars simultaneously just seems outdated, if the trouble diagnosing and the important spare part that lack system lack actv. monitoring, some trouble diagnosinies are made can not effectively to realize detecting and judging, the series of problems such as the storage of causing trouble and removing.Concerning automobile, the fault handling of the diagnosis of brake pedal partial fault, brake system all relates to the every aspect of car load safety, is the most direct part affecting vehicle performance.
Summary of the invention
Object of the present invention is intended at least solve one of described technological deficiency.
For this reason, first object of the present invention is the brake switch failure judgment method proposing a kind of vehicle, and the method makes vehicle reduce fault occurrence rate to the full extent, also ensure that the safety performance of driving simultaneously, and has accuracy and applicability.Second object of the present invention is the brake switch device for detecting fault proposing a kind of vehicle.
To achieve these goals, the embodiment of first aspect present invention provides a kind of brake switch failure judgment method of vehicle, comprises the following steps: S1: the main switch analog signal and the auxiliary switch analog signal that detect the brake switch of vehicle; S2: digitized processing is carried out to generate corresponding main switch digital quantity and auxiliary switch digital quantity to described main switch analog signal and auxiliary switch analog signal; S3: described main switch digital quantity and auxiliary switch digital quantity are analyzed, when described main switch digital quantity and auxiliary switch digital quantity are true time, judge described brake switch fault, when described main switch digital quantity and auxiliary switch digital quantity are fictitious time, judge described brake switch safety, and when described main switch digital quantity and auxiliary switch digital quantity inconsistent time, cycle of run starts to clock, and when timing is to pre-determined threshold, detect that described main switch digital quantity and auxiliary switch digital quantity still keep inconsistent, then judge that described brake switch fault is permanent fault.
According to the brake switch failure judgment method of the vehicle of the embodiment of the present invention, by brake switch signal through two-way collection, the main switch analog signal obtained and auxiliary switch analog signal carry out digitized processing to generate corresponding main switch digital quantity and auxiliary switch digital quantity, main switch digital quantity and auxiliary switch digital quantity are analyzed, detect and judge brake switch fault level, and export failure code corresponding to fault, finally according to breakdown judge the need of sending prompting.The method makes vehicle reduce fault occurrence rate to the full extent, also ensure that the safety performance of driving simultaneously, and has accuracy and applicability.
In one embodiment of the invention, after described S3, also comprise the steps:
S4: when detecting that described main switch digital quantity and auxiliary switch digital quantity are true time, failure judgement type is temporary derangement, and start timing, wherein, described main switch digital quantity and auxiliary switch digital quantity adjust in timing course, when detecting that current described main switch digital quantity and current auxiliary switch digital quantity are fictitious time, failure judgement type is permanent fault.Thus, improve simple type and the leglibility of fault type differentiation.
In one embodiment of the invention, after described S4, also comprise the steps:
S5: failure judgement grade, and export failure code corresponding to fault.Thus, improve accuracy and the ease for use of failure judgement grade.
In one embodiment of the invention, after described S5, also comprise the steps:
S6: analyze described failure code, obtains the fault level that described fault is corresponding, according to described breakdown judge the need of sending prompting and alerting pattern.Thus, improve the identification of user to breakdown judge.
In one embodiment of the invention, the form of described prompting comprises voice reminder and/or light flash prompting.Thus, improve variety and the applicability of prompting.
The embodiment of second aspect present invention proposes a kind of brake switch device for detecting fault of vehicle, comprising: detection module, for detecting main switch analog signal and the auxiliary switch analog signal of the brake switch of vehicle, processing module, for carrying out digitized processing to generate corresponding main switch digital quantity and auxiliary switch digital quantity to affiliated main switch analog signal and auxiliary switch analog signal, judge module, for analyzing described main switch digital quantity and auxiliary switch digital quantity, when described main switch digital quantity and auxiliary switch digital quantity are true time, judge described brake switch fault, when described main switch digital quantity and auxiliary switch digital quantity are fictitious time, judge described brake switch safety, and when described main switch digital quantity and auxiliary switch digital quantity inconsistent time, cycle of run starts timing, and when timing is to pre-determined threshold, detect that described main switch digital quantity and auxiliary switch digital quantity still keep inconsistent, then judge that described brake switch fault is permanent fault.
According to the brake switch device for detecting fault of the vehicle of the embodiment of the present invention, by brake switch signal through two-way collection, the main switch analog signal obtained and auxiliary switch analog signal carry out digitized processing to generate corresponding main switch digital quantity and auxiliary switch digital quantity, main switch digital quantity and auxiliary switch digital quantity are analyzed, detect and judge brake switch fault level, and export failure code corresponding to fault, finally according to breakdown judge the need of sending prompting.This device makes vehicle reduce fault occurrence rate to the full extent, also ensure that the safety performance of driving simultaneously, and has accuracy and applicability.
In one embodiment of the invention, described judge module also for: when detecting that described main switch digital quantity and auxiliary switch digital quantity are true time, failure judgement type is temporary derangement, and start timing, otherwise failure judgement type is permanent fault, and failure judgement grade, and export failure code corresponding to fault.Thus, improve the accuracy of failure judgement grade, leglibility and ease for use.
In one embodiment of the invention, prompting module, according to breakdown judge the need of sending prompting and alerting pattern, wherein, described breakdown judge is obtain according to exporting failure code analysis corresponding to fault.Thus, improve the identification of user to breakdown judge.
In one embodiment of the invention, the form of described prompting comprises light flash prompting while of lighting Warning light prompting and/or buzzing.Thus, improve variety and the applicability of prompting.
In one embodiment of the invention, described judge module also lights Warning light prompting and/or buzzing light flash prompting simultaneously for judging that described prompting module adopts.Thus, improve the variety judging the mode identified and applicability.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the diagram of circuit of the brake switch failure judgment method of vehicle according to the embodiment of the present invention;
Fig. 2 is the diagram of circuit of the brake switch failure judgment method of vehicle according to another embodiment of the present invention;
Fig. 3 is the structural representation of the brake switch device for detecting fault of vehicle according to the embodiment of the present invention;
Fig. 4 is the structural representation of the brake switch device for detecting fault of vehicle according to another embodiment of the present invention;
Fig. 5 is brake switch fault verification state transition diagram;
Fig. 6 is brake switch signal process sequential chart;
Fig. 7 is Das Gaspedal interactivity monitoring principle figure.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " cw ", orientation or the position relationship of the instruction such as " conter clockwise " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score can comprise the first and second features and directly contact, also can comprise the first and second features and not be directly contact but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " above " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is less than second feature.
As shown in Figure 1, the diagram of circuit of the brake switch failure judgment method of the vehicle of the embodiment of the present invention, comprises the steps:
Step S101 is the brake switch analog signal and the auxiliary switch analog signal that detect vehicle.
Step S102 carries out digitized processing to generate corresponding main switch digital quantity and auxiliary switch digital quantity to main switch analog signal and auxiliary switch analog signal.
Step S103 is for analyze main switch digital quantity and auxiliary switch digital quantity.
Particularly, when main switch digital quantity and auxiliary switch digital quantity are true time, judge brake switch fault, when main switch digital quantity and auxiliary switch digital quantity are fictitious time, judge brake switch safety, and when main switch digital quantity and auxiliary switch digital quantity inconsistent time, i.e. main switch digital quantity and auxiliary switch digital quantity, wherein any one is true, any one is false, and cycle of run starts timing, and when timing is to pre-determined threshold, detect that main switch digital quantity and auxiliary switch digital quantity still keep inconsistent, then judge that brake switch fault is permanent fault.
As shown in Figure 2, the diagram of circuit of the brake switch failure judgment method of the vehicle of another embodiment of the present invention, also comprises the steps:
Step S104 is for being true time when detection main switch digital quantity and auxiliary switch digital quantity, failure judgement type is temporary derangement, and start timing, wherein, main switch digital quantity and auxiliary switch digital quantity adjust in timing course, when detecting that current main switch digital quantity and current auxiliary switch digital quantity are fictitious time, failure judgement type is permanent fault.
Step S105 is failure judgement grade, and exports failure code corresponding to fault.
Step S106 is analysis of failure code, obtains the fault level that fault is corresponding, according to breakdown judge the need of sending prompting and alerting pattern.Wherein, the form of prompting comprises light flash prompting while of lighting Warning light prompting and/or buzzing.
According to the brake switch failure judgment method of the vehicle of the embodiment of the present invention, by brake switch signal through two-way collection, the main switch analog signal obtained and auxiliary switch analog signal carry out digitized processing to generate corresponding main switch digital quantity and auxiliary switch digital quantity, main switch digital quantity and auxiliary switch digital quantity are analyzed, detect and judge brake switch fault level, and export failure code corresponding to fault, finally according to breakdown judge the need of sending prompting.The method makes vehicle reduce fault occurrence rate to the full extent, also ensure that the safety performance of driving simultaneously, and has accuracy and applicability.
Fig. 3 is brake switch fault verification state transition diagram.
Whole brake switch fault verification state transition diagram as shown in Figure 3, particularly, after entire car controller initialization, when brake pedal primary sensor debounce signal (VINP_flg_BrakeSwtDebVal) is equal with secondary sensor debounce signal (VINP_flg_BrakeRedSwtDebVal) of brake pedal, namely through the main switch signal of Key dithering and auxiliary switch signal be all fictitious time, or when the main switch signal of Key dithering and auxiliary switch signal are true, switch sensor is in does not have state in bad order completely, namely brake system N state PMM_SystemsState_enum is that brake system normally indicates (Enum_PMM_Norm), it is now state 1.
Further, in state 1, if when brake pedal primary sensor debounce signal (VINP_flg_BrakeSwtDebVal) is unequal with secondary sensor debounce signal (VINP_flg_BrakeRedSwtDebVal) of brake pedal, if namely main switch signal and auxiliary switch signal the two not etc., namely one is false, and one is true, and switch sensor jumps to fault recognition transient state, i.e. state 2, fail timer starts to clock.
In state 2, particularly, if main switch signal and auxiliary switch signal are all set to fictitious time, keep timers value and wait for the judgement of computation period subsequently, in computation period subsequently, if when main switch signal and auxiliary switch signal are true, be so transferred to state 1, time meter is stopped to clock and make zero; If main switch signal and auxiliary switch signal are all fictitious time, time meter is so kept to clock numerical value.
Further, in state 2, if main switch signal and auxiliary switch signal now reach equal, namely main switch signal and auxiliary switch signal are all fictitious time, so jump to state 2, and continue clocking of time meter; If when main switch signal and auxiliary switch signal are true, so jump to state 1, time meter stops clocking.If main switch signal and auxiliary switch signal are always at a stalemate unequal, i.e. main switch signal and auxiliary switch signal, wherein any one is true, any one is false, that time meter rolls and clocks, and when thresholding is clocked in time meter arrival, then jumps to fault recognition state, i.e. state 3, and stop time meter clocking.Wherein, clock thresholding user preset and be labeled as brake pedal debounce time constant (KINP_BrakeDeb_time).
In state 3, particularly, only have when main switch signal and auxiliary switch signal are true, jump to fault recognition transient state, i.e. state 4, and time meter starts to clock.
In state 4, particularly, be true if main switch signal is equal with auxiliary switch signal, so time meter rolls and clocks, until reach thresholding brake pedal debounce time constant (KINP_BrakeDeb_time) that clocks, jump to state 1, timing stops clocking and making zero; If main switch signal and auxiliary switch signal, wherein have one at least for fictitious time, so jump to state 3, time meter assignment is thresholding brake pedal debounce time constant (KINP_BrakeDeb_time) that clocks.
Further, be true when main switch signal is equal with auxiliary switch signal, can know that transient state 4 failure judgement type is temporary derangement in fault, time meter rolls and clocks, until reach thresholding brake pedal debounce time constant (KINP_BrakeDeb_time) that clocks, jump to state 1, timing stops clocking and making zero; If main switch signal and auxiliary switch signal, wherein has one at least for fictitious time, can be permanent fault in fault recognition transient state 4 failure judgement type, so jump to state 3, time meter assignment be thresholding brake pedal debounce time constant (KINP_BrakeDeb_time) that clocks.
Particularly, when after fault recognition transient state 4 failure judgement grade, and export failure code corresponding to fault, after obtaining failure code, through fault management analysis of failure code, obtain the information that fault is corresponding, and the fault level that fault is corresponding, judge whether that needs send prompting according to fault level, whether there is flash request, brake pedal fault initial value ENUM_DHP_BRKPDLVALID, brake pedal fault coverage value ENUM_DHP_BRKPDLRANGE and detection brake pedal faulty condition ENUM_DHP_STOPPED, wherein above-mentioned value is design variables, for selecting mil or sys, namely select to adopt the mode of light flash or directly real in digital form by diagnostic equipment read-out, variable and brake pedal faulty condition ENUM_DHP_TRANSEOPFAULT is drawn by certain algorithm, the i.e. chip selection signal of mil and sys, determine and adopt mil or sys to glimmer.
Fig. 4 is the structural representation of the brake switch device for detecting fault of vehicle according to the embodiment of the present invention.
As shown in Figure 4, the brake switch device for detecting fault 400 of the vehicle of the embodiment of the present invention, comprising: detection module 410, processing module 420 and judge module 430.
Detection module 410 detects main switch analog signal and the auxiliary switch analog signal of the brake switch of vehicle, carries out digitized processing to generate corresponding main switch digital quantity and auxiliary switch digital quantity by processing module 420 pairs of main switch analog signals and auxiliary switch analog signal; Analyze finally by judge module 430 pairs of main switch digital quantities and auxiliary switch digital quantity, when main switch digital quantity and auxiliary switch digital quantity are true time, judge brake switch fault, when main switch digital quantity and auxiliary switch digital quantity are fictitious time, judge brake switch safety, and when main switch digital quantity and auxiliary switch digital quantity inconsistent time, cycle of run starts timing, and when timing is to pre-determined threshold, detect that main switch digital quantity and auxiliary switch digital quantity still keep inconsistent, then judge that brake switch fault is permanent fault.
Further, for working as, judge module 430 also detects that main switch digital quantity and auxiliary switch digital quantity are true time, failure judgement type is temporary derangement, and start timing, wherein, main switch digital quantity and auxiliary switch digital quantity adjust in timing course, when detecting that current main switch digital quantity and current auxiliary switch digital quantity are fictitious time, failure judgement type is permanent fault, and failure judgement grade, and exports failure code corresponding to fault.
Fig. 5 is the structural representation of the brake switch device for detecting fault of vehicle according to another embodiment of the present invention.
As shown in Figure 5, the brake switch device for detecting fault 400 of the vehicle of the embodiment of the present invention, also comprises: prompting module 440.
Prompting module 440 is reminded and alerting pattern the need of sending according to breakdown judge, wherein, breakdown judge is that the failure code analysis corresponding according to output fault obtains, and the form of reminding comprises light flash prompting while of lighting Warning light prompting and/or buzzing, and
Judge module 430 also lights Warning light prompting and/or buzzing light flash prompting simultaneously for judging that prompting module 440 adopts.
According to the brake switch device for detecting fault of the vehicle of the embodiment of the present invention, by brake switch signal through two-way collection, the main switch analog signal obtained and auxiliary switch analog signal carry out digitized processing to generate corresponding main switch digital quantity and auxiliary switch digital quantity, main switch digital quantity and auxiliary switch digital quantity are analyzed, detect and judge brake switch fault level, and export failure code corresponding to fault, finally according to breakdown judge the need of sending prompting.This device makes vehicle reduce fault occurrence rate to the full extent, also ensure that the safety performance of driving simultaneously, and has accuracy and applicability.
Fig. 6 is brake switch signal process sequential chart.
When entire car controller judges whether brake switch signal lost efficacy, whether the condition that needs are diagnosed is the position of key switch is K15, namely often say in KEYON state, the speed of a motor vehicle is at 15Km/h-45Km/h in addition, need to carry out acquisition process to brake switch signal simultaneously, the major and minor sensor of brake switch is employed, the Acquire and process of two-way sensor signal in software.
Particularly, as shown in Figure 6, brake switch signal is through two-way collection, i.e. brake switch main switch, brake switch auxiliary switch, obtains the untreated signal of brake switch, and the incoming signal after dithering process, as the original input signal that whether there is fault.
Further, the trouble diagnosing of brake fault from logic development to storage and response, terminate to fault handling.After brake module fault occurs, system is by logic decision, and the impact of the response taked whole diagnostic system and relevant portion, has done a complete explanation.From the signal acquisition of brake pedal, system adopts two paths of signals: road simulation and a path switching signal, instead of to be simply defined as on-off signal be that information displaying is used, and analog signal is used for division by information processing.This two paths of signals all needs entire car controller to carry out Coordination Treatment, and do as synthetic determination fault.
Fig. 7 is Das Gaspedal interactivity Cleaning Principle figure.
As shown in Figure 7, the application after certain fault identifier conductively-closed acceleration pedal processing module can be found out from whole flow process.Particularly, the reliability detection of Das Gaspedal uses under brake pedal coordinates.When driving, Das Gaspedal and brake pedal can not be worked together and be stepped down.If system obtains the signal of Das Gaspedal and gets back and step on the signal of brake pedal simultaneously, generally in order to security consideration, brake switch can be defaulted as preferentially effective, thus the incoming signal of shielding acceleration pedal, request forbids that corresponding torque module exports.This consideration is floored and the state of not rebounding that breaks down from if there is acceleration pedal, and when actv. speed-slackening signal being detected again, system exports with regard to hard closing moment of torsion simultaneously, is defaulted as braking effectively preferential, ensure that the safety of driving.If detect that acceleration pedal is in several repetition periods of maxim, but when actv. speed-slackening signal not detected again simultaneously, can think that accelerator pedal signal is unreliable signal, now Das Gaspedal fixed value can be given, car load keeps a constant torque output, to ensure that user can arrive at repair center.
Further, 5. input port is as shown in Figure 7 the final output parameter that Das Gaspedal reliability detects; The submodule CHECK of encapsulation has five inputs, is respectively: VAPD_ISThreshold1_V is expressed as acceleration pedal 1 road input voltage; VAPD_ISThreshold2_V is expressed as acceleration pedal 2 road input voltage; VAPD_AccelPedallTmp_pct is expressed as acceleration pedal 1 road pedal angle; APD_AccelPedallTmp_pct is expressed as acceleration pedal 2 road pedal angle; APD_Faults is expressed as acceleration pedal Reflector.The submodule APD_BPD_Implausible of encapsulation has four inputs, is respectively: VINP_BrkLightSwitchActive_flg is expressed as stop lamp switch zone bit; VINP_flgBrakeSwitch is expressed as brake pedal switch signal; VINP_BrkPedalPosnIn_V1 is expressed as angle of brake pedal position signal 1; VINP_BrkPedalPosnIn_V2 is expressed as angle of brake pedal position signal 2, and inside is one and door, when three conditions of its input are true time simultaneously, just exports true; Back to back part is rest-set flip-flop, and be false at S input end by state, the state of jumping to is true time, and it is true that Q exports; B part is the release conditions that Das Gaspedal reliability detects, wherein, KAPD_BLSPlausGrdPos_pct is the tread depths maxim allowed within 1 cycle, this condition is determined by brake pedal, only have brake pedal signal under normal conditions b part just export be true, wherein, APDImplausibleLimitEnd_flg is expressed as the zone bit that brake pedal judges alternately to acceleration pedal, and VINP_APDPlusBPD_State is expressed as the state that brake pedal judges alternately to acceleration pedal; The effect of a part is exactly the whether normal of real-time response brake pedal signal.
Particularly, when brake signal is normal, fault identifier VDHP_AccPed_Brk_mp.0 is true, and it can be true that a part exports, and wherein, a part exports as Allah will also determine some other condition, is not repeated herein; When brake signal mal, fault identifier VDHP_AccPed_Brk_mp.0 is false, and it must be false that a part exports, and wherein, no matter whether some other condition meets, and it must be false that a part exports.
The present invention allows whole brake fault checking system be no longer do for the single parts that probability is higher to detect input, but utilize system to have a selectable algorithm to judge whether fault exists, and these identifying informations of energy Coordination Treatment, allow entire car controller system to analyze car load data and to provide judgement, the fault detection of brake system part is no longer isolated, relate to some other critical failure to be unified to come in, reduce fault occurrence rate to the full extent to vehicle, also ensure that the safety performance of driving simultaneously.
Further, in braking system faults diagnostic field, testing circuit is to the critical elements brake pedal of brake system, braking gas (liquid) loop, vacuum pumps etc. are monitored, if there is the single unit failure of system, but whole vehicle body, the impact of this fault does not immediately display, brake diagnosis system can according to the impact of monitored element on the safety performance of vehicular drive, to car load dynamic property, the impact of economy makes the award, this ruling depends on that obtaining the signal of coming in miscellaneous part even other parts of vehicle of system determines, whole brake fault checking system is allowed to be no longer do monitoring input for the single parts that probability is higher, but utilize system to have a selectable algorithm to judge whether fault exists, and these identifying informations of energy Coordination Treatment, allow entire car controller system to analyze car load data and to provide judgement, the fault detection of brake system part is no longer isolated, relate to some other critical failure to be unified to come in, fault occurrence rate is reduced to the full extent to vehicle, also ensure that the safety performance of driving simultaneously.
Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, multiple step or method can with to store in memory and the software performed by suitable instruction execution system or firmware realize.Such as, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: the discrete logic with the logic gates for realizing logic function to data-signal, there is the special IC of suitable combinatory logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, this program perform time, step comprising embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium mentioned can be read-only memory (ROM), disk or CD etc.
In the description of this specification sheets, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art can change above-described embodiment within the scope of the invention when not departing from principle of the present invention and aim, revising, replacing and modification.
Claims (8)
1. a brake switch failure judgment method for vehicle, is characterized in that, comprise the steps:
S1: the main switch analog signal and the auxiliary switch analog signal that detect the brake switch of vehicle;
S2: digitized processing is carried out to generate corresponding main switch digital quantity and auxiliary switch digital quantity to described main switch analog signal and auxiliary switch analog signal;
S3: described main switch digital quantity and auxiliary switch digital quantity are analyzed, when described main switch digital quantity and auxiliary switch digital quantity are true time, judge described brake switch fault, when described main switch digital quantity and auxiliary switch digital quantity are fictitious time, judge described brake switch safety, and when described main switch digital quantity and auxiliary switch digital quantity inconsistent time, cycle of run starts timing, and when timing is to pre-determined threshold, detect that described main switch digital quantity and auxiliary switch digital quantity still keep inconsistent, then judge that temporary brake switch fault is permanent fault;
S4: when detecting that described main switch digital quantity and auxiliary switch digital quantity are true time, failure judgement type is temporary derangement, and start timing, wherein, described main switch digital quantity and auxiliary switch digital quantity adjust in timing course, when detecting that current described main switch digital quantity and current auxiliary switch digital quantity are fictitious time, failure judgement type is permanent fault.
2. failure judgment method as claimed in claim 1, is characterized in that, after described S4, also comprise the steps:
S5: export the failure code that fault is corresponding.
3. fault judgment method as claimed in claim 2, is characterized in that, after described S5, also comprise the steps:
S6: analyze described failure code, obtains the fault level that described fault is corresponding, judges whether that needs send prompting and alerting pattern according to described fault level.
4. fault judgment method as claimed in claim 3, is characterized in that, the form of described prompting comprises lights Warning light prompting and/or buzzing light flash prompting simultaneously.
5. a brake switch device for detecting fault for vehicle, is characterized in that, comprising:
Detection module, for detecting main switch analog signal and the auxiliary switch analog signal of the brake switch of vehicle;
Processing module, for carrying out digitized processing to generate corresponding main switch digital quantity and auxiliary switch digital quantity to described main switch analog signal and auxiliary switch analog signal;
Judge module, for analyzing described main switch digital quantity and auxiliary switch digital quantity, when described main switch digital quantity and auxiliary switch digital quantity are true time, judge described brake switch fault, when described main switch digital quantity and auxiliary switch digital quantity are fictitious time, judge described brake switch safety, and when described main switch digital quantity and auxiliary switch digital quantity inconsistent time, cycle of run starts timing, and when timing is to pre-determined threshold, detect that described main switch digital quantity and auxiliary switch digital quantity still keep inconsistent, then judge that described brake switch fault is permanent fault, for working as, described judge module also detects that described main switch digital quantity and auxiliary switch digital quantity are true time, failure judgement type is temporary derangement, and start timing, wherein, described main switch digital quantity and auxiliary switch digital quantity adjust in timing course, when detecting that current described main switch digital quantity and current auxiliary switch digital quantity are fictitious time, failure judgement type is permanent fault, and failure judgement grade, and export failure code corresponding to fault.
6. failure judgment device as claimed in claim 5, is characterized in that, also comprise prompting module:
Prompting module, according to breakdown judge the need of sending prompting and alerting pattern, wherein, described breakdown judge is obtain according to exporting failure code analysis corresponding to fault.
7. failure judgment device as claimed in claim 6, is characterized in that, the form of described prompting comprises lights Warning light prompting and/or buzzing light flash prompting simultaneously.
8. failure judgment device as claimed in claim 6, is characterized in that, also comprise: described judge module also lights Warning light prompting and/or buzzing light flash prompting simultaneously for judging that described prompting module adopts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210560800.XA CN103879397B (en) | 2012-12-20 | 2012-12-20 | The brake switch failure judgment method of vehicle and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210560800.XA CN103879397B (en) | 2012-12-20 | 2012-12-20 | The brake switch failure judgment method of vehicle and device |
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| CN106585485A (en) * | 2016-12-15 | 2017-04-26 | 北京汽车研究总院有限公司 | Braking lamp control system of automobile and braking lamp control method |
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| CN104827916B (en) * | 2014-12-19 | 2017-03-15 | 北汽福田汽车股份有限公司 | The determination method and apparatus of braking energy feedback coefficient |
| CN108791060B (en) * | 2018-06-14 | 2020-06-23 | 安徽江淮汽车集团股份有限公司 | Brake lamp switch fault diagnosis method and device |
| CN110194139B (en) * | 2019-05-29 | 2021-01-29 | 中国第一汽车股份有限公司 | Brake test state determining method and device and vehicle |
| CN112455410B (en) * | 2020-11-27 | 2022-05-03 | 重庆长安新能源汽车科技有限公司 | Control method of vacuum pump of electric automobile |
| CN113183938B (en) * | 2021-05-10 | 2024-07-12 | 上海利真汽车服务咨询有限公司 | Method and system for detecting and removing faults of vehicle control unit |
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| JP4887126B2 (en) * | 2006-11-30 | 2012-02-29 | ボッシュ株式会社 | Brake switch failure diagnosis method and brake switch failure diagnosis device |
| FR2914604B1 (en) * | 2007-04-06 | 2009-05-22 | Renault Sas | METHOD FOR DIAGNOSING BRAKE PEDAL CONTACTORS |
| JP5221983B2 (en) * | 2008-02-29 | 2013-06-26 | 本田技研工業株式会社 | Fault diagnosis system |
| JP5030105B2 (en) * | 2008-06-27 | 2012-09-19 | ボッシュ株式会社 | Brake switch failure diagnosis apparatus and failure diagnosis method |
| CN102490717B (en) * | 2011-12-20 | 2014-03-12 | 奇瑞汽车股份有限公司 | Control method for electromobile brake switch control system |
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