CN102975766A - Electric hydraulic power-assisted steering system failure diagnosing method and controller - Google Patents
Electric hydraulic power-assisted steering system failure diagnosing method and controller Download PDFInfo
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- CN102975766A CN102975766A CN2012105365629A CN201210536562A CN102975766A CN 102975766 A CN102975766 A CN 102975766A CN 2012105365629 A CN2012105365629 A CN 2012105365629A CN 201210536562 A CN201210536562 A CN 201210536562A CN 102975766 A CN102975766 A CN 102975766A
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Abstract
The invention discloses an electric hydraulic power-assisted steering system failure diagnosing method and a controller. The method comprises the following steps of receiving working parameters of an electric hydraulic power-assisted steering system, which are acquired at the moment, wherein the working parameters comprise voltage and current of the two ends of a motor, the opening degree of a hydraulic oil distributing valve, a management signal of a high-pressure management unit, the oil amount of an oil storage tank, oil pressure between an electric hydraulic power-assisted steering oil pump and the hydraulic oil distributing valve, and hydraulic oil flow rate between the hydraulic oil distributing valve and a steering executing unit; and analyzing the type of a failure of a part of an electric hydraulic power-assisted steering system according to the working parameters. Which part fails is determined by analyzing the received working parameters, so that an automatic failure diagnosing function of the electric hydraulic power-assisted steering system is realized.
Description
Technical field
The present invention relates to automatic control technology, particularly relate to a kind of electric hydraulic power-assisted steering system method for diagnosing faults and controller.
Background technology
With reference to shown in Figure 1, be the electric hydraulic power-assisted steering system structural representation in the automobile, described electric hydraulic power-assisted steering system generally comprises petrol storage tank, electric power steering oil pump, hydraulic oil distribution valve, turns to performance element, hydraulic oil pipeline and high-tension distribution box, wherein, described electric power steering oil pump comprises motor and hydraulic booster pump.
The principle of work of electric hydraulic power-assisted steering system is: when automobile is transformed into electric model by the on-electric pattern, entire car controller transmits control signal to the high pressure administrative unit in the high-tension distribution box, the power connection of high pressure management unit controls electric hydraulic power-assisted steering system, be electric power steering pump power supply in the electric hydraulic power-assisted steering system by the configuration high-tension distribution box, after the energising of electric power steering pump, the machine operation in the described electric power steering pump then, and drive hydraulic booster pump is pressed into hydraulic oil pipeline with the hydraulic oil in the petrol storage tank with certain pressure, the hydraulic oil pipeline that is that is added the thick line mark among the figure by black, if this moment, bearing circle did not rotate, the flow direction of described hydraulic oil in hydraulic oil pipeline is 1 loop of solid line mark among Fig. 1; If rotating of steering wheel, then the flow direction of hydraulic oil in hydraulic oil pipeline is 2 loops of dotted line mark among Fig. 1.
When automobile normally moves, electric hydraulic power-assisted steering system is controlled the rotation of car load bearing circle by above-mentioned principle of work, but the contriver finds in research process, do not monitor whether technical scheme working properly of electric hydraulic power-assisted steering system in the prior art, if the electric hydraulic power-assisted steering system et out of order then can not accurately be realized the rotation of bearing circle, such as, the excessive problem of rotating of steering wheel angle may occur, this will bring hidden danger to the driving safety of chaufeur.
Summary of the invention
The invention provides a kind of electric hydraulic power-assisted steering system method for diagnosing faults and controller, can't carry out to the fault that itself occurs the technical matters of selfdiagnosis with electric hydraulic power-assisted steering system in the solution prior art.
For solving the problems of the technologies described above, the invention provides a kind of electric hydraulic power-assisted steering system method for diagnosing faults and controller, the invention provides following technical scheme:
A kind of electric hydraulic power-assisted steering system method for diagnosing faults, the method comprises:
Be received in the working parameter of the electric hydraulic power-assisted steering system that current time gathers, described working parameter comprises oil pressure, the hydraulic oil distribution valve between oil mass, electric power steering oil pump and the hydraulic oil distribution valve of management signal, petrol storage tank of valve opening, the high pressure administrative unit of voltage and current, the hydraulic oil distribution valve at motor two ends and turns to hydraulic fluid flow rate between the performance element;
The fault type that occurs according to the parts of described operation parameters analysis electric hydraulic power-assisted steering system.
Preferably, the described fault type that occurs according to the parts of described operation parameters analysis electric hydraulic power-assisted steering system comprises:
Judge whether described working parameter satisfies the condition of motor open failure, the condition of described motor open failure is: the voltage at described motor two ends electric current non-vanishing and motor is zero, if satisfy, determine that then the fault type that electric hydraulic power-assisted steering system occurs is that motor disconnects.
Preferably, the described fault type that occurs according to the parts of described operation parameters analysis electric hydraulic power-assisted steering system comprises:
Judge whether described working parameter satisfies the condition of high pressure administrative unit CAN bus communication fault, the condition of described high pressure administrative unit CAN bus communication fault is: the valve opening of hydraulic oil distribution valve management signal non-vanishing and the high pressure administrative unit is zero, if satisfy, determine that then the fault type that electric hydraulic power-assisted steering system occurs is high pressure administrative unit CAN bus communication fault.
Preferably, the described fault type that occurs according to the parts of described operation parameters analysis electric hydraulic power-assisted steering system comprises:
Judge whether described working parameter satisfies the condition of branch road or relay fault, the condition of described branch road or relay fault is: the management signal of described high pressure administrative unit voltages non-vanishing and the motor two ends are zero, if satisfy, determine that then the fault type that electric hydraulic power-assisted steering system occurs is branch road or relay fault.
Preferably, the described fault type that occurs according to the parts of described operation parameters analysis electric hydraulic power-assisted steering system comprises:
The oil mass of described petrol storage tank is converted into percentages;
Whether judge described percentages less than predetermined threshold value, if the fault type of then determining the electric hydraulic power-assisted steering system generation is that the oil mass of petrol storage tank is few.
Preferably, the described fault type that occurs according to the parts of described operation parameters analysis electric hydraulic power-assisted steering system comprises:
In the matching relationship figure that prestores, search with described working parameter in the valve opening of hydraulic oil distribution valve identical with the oil pressure between electric power steering oil pump and the hydraulic oil distribution valve or in default error limit immediate target oil pressure and target valve aperture;
If find, then will and turn to the hydraulic fluid flow rate between the performance element to subtract each other corresponding to target flow and the hydraulic oil distribution valve in the described working parameter of described target oil pressure and target valve aperture, to obtain difference;
Judge whether described difference exceeds default error burst, if exceed, determine that then the fault type that electric hydraulic power-assisted steering system occurs is that oil circuit is unusual.
Preferably, describedly judge whether described difference exceeds default error burst, if exceed, then determine fault type that electric hydraulic power-assisted steering system occurs be oil circuit unusual after, also comprise:
Judge the hydraulic oil distribution valve and turn to hydraulic fluid flow rate between the performance element whether greater than described target oil mass, if greater than, determine that then the fault type that electric hydraulic power-assisted steering system occurs is that valve opening is larger;
If less than, determine that then the fault type that electric hydraulic power-assisted steering system occurs is that valve opening is less.
Preferably, described method also comprises:
Voltage and current to the motor two ends carries out integral operation, obtains the consumption of current of described electric hydraulic power-assisted steering system in Preset Time, in order to the car load consumption of current is estimated.
The present invention also provides a kind of controller, and described controller comprises:
Receiving element, be used for being received in the working parameter of the electric hydraulic power-assisted steering system that current time gathers, described working parameter comprises oil pressure, the hydraulic oil distribution valve between oil mass, electric power steering oil pump and the hydraulic oil distribution valve of management signal, petrol storage tank of valve opening, the high pressure administrative unit of voltage and current, the hydraulic oil distribution valve at motor two ends and turns to hydraulic fluid flow rate between the performance element;
Analytic unit is used for the fault type according to the parts generation of described operation parameters analysis electric hydraulic power-assisted steering system.
Preferably, if the motor open failure occurs, described analytic unit specifically comprises:
The first judgment sub-unit is used for judging whether described working parameter satisfies the condition of motor open failure, and the condition of described motor open failure is: the voltage at described motor two ends electric current non-vanishing and motor is zero;
First determines subelement, when satisfying the condition of motor open failure for described working parameter, determines that the fault type that electric hydraulic power-assisted steering system occurs is that motor disconnects.
Preferably, if high pressure administrative unit CAN bus communication fault occurs, described analytic unit specifically comprises:
The second judgment sub-unit, be used for judging whether described working parameter satisfies the condition of high pressure administrative unit CAN bus communication fault, the condition of described high pressure administrative unit CAN bus communication fault is: the valve opening of hydraulic oil distribution valve management signal non-vanishing and the high pressure administrative unit is zero;
Second determines subelement, when whether satisfying the condition of high pressure administrative unit CAN bus communication fault for described working parameter, determines that the fault type that electric hydraulic power-assisted steering system occurs is high pressure administrative unit CAN bus communication fault.
Preferably, if branch road or relay fault occur, then described analytic unit specifically comprises:
The 3rd judgment sub-unit is used for judging whether described working parameter satisfies the condition of branch road or relay fault, and the condition of described branch road or relay fault is: the management signal of described high pressure administrative unit voltages non-vanishing and the motor two ends are zero;
The 3rd determines subelement, when whether satisfying the condition of branch road or relay fault for described working parameter, determines that the fault type that electric hydraulic power-assisted steering system occurs is branch road or relay fault.
Preferably, if the few fault of the oil mass of petrol storage tank occurs, then described analytic unit specifically comprises:
The conversion subelement is used for the oil mass of described petrol storage tank is converted into percentages;
The 4th judgment sub-unit is used for judging that whether described percentages is less than predetermined threshold value;
The 4th determines subelement, and when being used for described percentages less than predetermined threshold value, the fault type of determining the electric hydraulic power-assisted steering system generation is that the oil mass of petrol storage tank is few.
Preferably, if the oil circuit abnormal failure occurs, then described analytic unit specifically comprises:
Search subelement, be used for the matching relationship figure that prestores search with described working parameter in the valve opening of hydraulic oil distribution valve identical with the oil pressure between electric power steering oil pump and the hydraulic oil distribution valve or presetting immediate target oil pressure and target valve aperture in the error limit;
Computation subunit, be used for when finding target oil pressure and target valve aperture, to and turn to the hydraulic fluid flow rate between the performance element to subtract each other corresponding to target flow and the hydraulic oil distribution valve in the described working parameter of described target oil pressure and target valve aperture, to obtain difference;
The 5th judgment sub-unit is used for judging whether described difference exceeds default error burst;
The 5th determines subelement, is used for described difference and exceeds when presetting error burst, determines that the fault type that electric hydraulic power-assisted steering system occurs is that oil circuit is unusual.
Preferably, described analytic unit also comprises:
Whether the 6th judgment sub-unit is used for judging the hydraulic oil distribution valve and turns to hydraulic fluid flow rate between the performance element greater than described target oil mass;
The 6th determines subelement, when being used for the hydraulic oil distribution valve and turning to hydraulic fluid flow rate between the performance element greater than described target oil mass, determine that the fault type that electric hydraulic power-assisted steering system occurs is that valve opening is larger, at the hydraulic oil distribution valve and when turning to hydraulic fluid flow rate between the performance element less than described target oil mass, determine that the fault type that electric hydraulic power-assisted steering system occurs is that valve opening is less.
Preferably, described controller also comprises:
Integral arithmetic unit is used for the voltage and current at motor two ends is carried out integral operation, obtains the consumption of current of described electric hydraulic power-assisted steering system in Preset Time, in order to the car load consumption of current is estimated.
In the technical scheme of the present invention, by receiving under the current time that gathers, the working parameter of electric hydraulic power-assisted steering system, and thereby described working parameter made a concrete analysis of the fault type that the parts of determining electric hydraulic power-assisted steering system occur, thereby realized the electric hydraulic power-assisted steering system fault self-diagnosis function.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, the accompanying drawing that the following describes only is some embodiment that put down in writing among the application, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the electric hydraulic power-assisted steering system structural representation of automobile in the prior art;
Fig. 2 is the diagram of circuit of a kind of electric hydraulic power-assisted steering system method for diagnosing faults of the present invention embodiment 1;
Fig. 3 is the diagram of circuit of a kind of electric hydraulic power-assisted steering system method for diagnosing faults of the present invention embodiment 2;
Fig. 4 is a kind of controller architecture scheme drawing of the present invention;
Fig. 5 is the structural representation that the present invention includes the controller of analytic unit structural representation;
Fig. 6 is the another kind of structural representation of a kind of controller of the present invention.
The specific embodiment
In order to make those skilled in the art person understand better the present invention program, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Need to prove, when technical scheme of the present invention is normally moved at electric hydraulic power-assisted steering system, can realize the Real Time Monitoring of the operation of electric hydraulic power-assisted steering system or the real-time analysis of data, when the parts et out of order of electric hydraulic power-assisted steering system, can be by the diagnosing malfunction of working parameter to occuring that gathers, with the generation of the accident avoiding causing because of the electric hydraulic power-assisted steering system et out of order.
With reference to shown in Figure 2, be the diagram of circuit of a kind of electric hydraulic power-assisted steering system method for diagnosing faults embodiment 1 provided by the invention, present embodiment specifically can comprise:
Step 201: the working parameter that is received in the electric hydraulic power-assisted steering system of current time collection.
In the automobile normal running process, if automobile is transformed into electric model by the on-electric pattern, just the Real-Time Monitoring of electric boosting steering system can have been carried out.Under electric model, preferably, can adopt sensor to gather the working parameter of current time electric hydraulic power-assisted steering system, the concrete working parameter that gathers can comprise: oil pressure, the hydraulic oil distribution valve between oil mass, electric power steering oil pump and the hydraulic oil distribution valve of the valve opening of the voltage and current at motor two ends, hydraulic oil distribution valve, the management signal of high pressure administrative unit, petrol storage tank and turn to hydraulic fluid flow rate between the performance element.
Wherein the management signal of high pressure administrative unit can be the set of a plurality of signals or state, and described management signal can be the numerical value of a reality, such as the size that can represent a voltage, it also can be the state that is represented by or multidigit two scale notation or hexadecimal numeral, such as, can be set to by a certain position in the management signal " 1 " expression branch road connects, disconnect with " 0 " expression branch road, in like manner, the not coordination in the described management signal can be used for identifying the mode of operation of different parts.The management signal of the working parameter of enumerating in the step 201 described herein and high pressure administrative unit wherein only is the understanding that helps present embodiment; can not regard the restriction to protection domain of the present invention as; because in actual applications; can be according to actual needs; gather different working parameters by sensor; for different faults, also can gather different high pressure management Single Component Management signals.
Step 202: the fault type that occurs according to the parts of described operation parameters analysis electric hydraulic power-assisted steering system.
After getting access to the working parameter of described electric hydraulic power-assisted steering system at current time, just can analyze fault type that the parts of electric hydraulic power-assisted steering system occur according to described working parameter; Wherein said fault type specifically comprises: the oil mass of motor open failure, high pressure administrative unit CAN bus communication fault, branch road or relay fault, petrol storage tank is few, oil circuit is unusual; described several fault type is for present embodiment is made an explanation, but it can not regard the restriction to protection domain of the present invention as.
The concrete analysis process of described several fault types is as follows:
1), in the working parameter that obtains, extracts the voltage at motor two ends and the electric current of motor, if the voltage at described motor two ends electric current non-vanishing and motor is zero, illustrate that then described motor switches on, can determine that then the fault type that electric hydraulic power-assisted steering system occurs is that motor disconnects.
2), the management signal of the valve opening of extract force feed distributing valve and high pressure administrative unit in the working parameter that obtains, if the valve opening of hydraulic oil distribution valve is non-vanishing, be that the direction hair updo has been given birth to rotation, this moment, automobile was in electric model, entire car controller transmits control signal to the high pressure administrative unit, control it and enter mode of operation, if this moment, the management signal of high pressure administrative unit was zero, illustrate that high pressure administrative unit CAN bus does not receive described control signal, determine that then the fault type that electric hydraulic power-assisted steering system occurs is high pressure administrative unit CAN bus communication fault.
3), in the working parameter that obtains, extract the management signal of high pressure administrative unit and the voltage at motor two ends, if the management signal of high pressure administrative unit is non-vanishing, illustrate that the high pressure administrative unit works, described high pressure administrative unit will be controlled the power connection of electric hydraulic power-assisted steering system, if the voltage at the motor two ends that gather this moment is zero, the branch road that high-tension distribution box and motor then are described is not connected, so, just can determine that the fault type that electric hydraulic power-assisted steering system occurs is branch road or relay fault.
4), in the working parameter that obtains, extract the oil mass of petrol storage tank, the oil mass with described petrol storage tank after the extraction is converted into percentages, here, when converting, is as the conversion foundation with the maximum oil reserve of petrol storage tank.In actual applications, can preset a threshold value and be used for representing the minimum oil reserve percentum that automobile can normally move, so, after the oil mass with described petrol storage tank is converted into percentages, just percentages and the described default threshold value that converts can be compared, if the percentages that converts is less than predetermined threshold value, the fault type that just can determine the electric hydraulic power-assisted steering system generation is that the oil mass of petrol storage tank is few, because oil reserve is few, so described hydraulic oil just can not provide enough power to drive bearing circle and rotate.
5), the oil pressure between the valve opening of extract force feed distributing valve and electric power steering oil pump and the hydraulic oil distribution valve in the working parameter that obtains, then in the matching relationship figure that prestores, search target oil pressure and target valve aperture, described target oil pressure and target valve aperture refer to described working parameter in the valve opening of hydraulic oil distribution valve identical with the oil pressure between electric power steering oil pump and the hydraulic oil distribution valve or immediate in default error limit.After finding, to and turn to the hydraulic fluid flow rate between the performance element to subtract each other corresponding to target flow and the hydraulic oil distribution valve in the described working parameter of described target oil pressure and target valve aperture, obtain a difference, be designated as the first difference, then just can judge whether described the first difference exceeds the first default error burst, if exceed, just can determine that the fault type that electric hydraulic power-assisted steering system occurs is that oil circuit is unusual.
Be understandable that in the specifying of above-mentioned diagnostic procedure to several faults, label 1)-5) sequencing during the representing fault diagnosis not, just distinguish the sign of different faults diagnostic mode.
In like manner, then valve opening and hydraulic oil distribution valve that also can extract force feed distributing valve in the working parameter that obtains and turn to hydraulic fluid flow rate between the performance element search target oil mass and target valve aperture in the matching relationship figure that prestores.After finding, to subtract each other corresponding to the target oil pressure of described target oil mass and target valve aperture and the electric power steering oil pump in the described working parameter and the oil pressure between the hydraulic oil distribution valve, also can obtain a difference, be designated as the second difference, then judge whether described the second difference exceeds the second default error burst, if exceed, just can determine that the fault type that electric hydraulic power-assisted steering system occurs is that oil circuit is unusual;
In like manner, also can extract force feed distributing valve in the working parameter that obtains and turn to hydraulic fluid flow rate between the performance element and the oil pressure between electric power steering oil pump and the hydraulic oil distribution valve, in the matching relationship figure that prestores, search target oil pressure and target oil mass; To subtract each other corresponding to the target valve aperture of described target oil pressure and target oil mass after finding, also can obtain a difference, be designated as the 3rd difference; Obtain after the 3rd difference, just can judge that whether described the 3rd difference exceeds the 3rd default error burst, if exceed, just can determine that the fault type that electric hydraulic power-assisted steering system occurs is that oil circuit is unusual.
The three kinds of situations that can determine electric hydraulic power-assisted steering system generation oil circuit abnormal failure have been provided in the present embodiment, wherein, the used matching relationship figure that prestores can be a graphics in these three kinds of methods, also can be the form of a save data, its concrete form be not construed as limiting here.What identify among the described matching relationship figure is oil pressure, the hydraulic oil distribution valve between valve opening, electric power steering oil pump and the hydraulic oil distribution valve of the hydraulic oil distribution valve that obtains according to test of many times or by empirical value and turns to a quantitative relation between this three of hydraulic fluid flow rate between the performance element, described relation refers in the situation of electric hydraulic power-assisted steering system normal operation, the numerical relation between described three working parameters.
In the technical scheme of present embodiment, by receiving under the current time that gathers, the working parameter of electric hydraulic power-assisted steering system, and thereby described working parameter made a concrete analysis of the fault type that the parts of determining electric hydraulic power-assisted steering system occur, realized the function of electric hydraulic power-assisted steering system fault self-diagnosis.
With reference to shown in Figure 3, be the diagram of circuit of a kind of electric hydraulic power-assisted steering system method for diagnosing faults embodiment 2 provided by the invention, present embodiment can be regarded as the specific implementation of embodiment 1, and present embodiment specifically comprises:
Step 301: sensor gathers the working parameter of current time electric hydraulic power-assisted steering system.
Step 302: described working parameter is sent to controller.
Step 303: described controller is according to the fault type of the parts generation of the operation parameters analysis electric hydraulic power-assisted steering system that receives.
The step 201-step 202 of the realization of step 301-step 303 in can embodiment 1 is similar, repeats no more herein.
Need to prove, in the step 202 in embodiment 1, when determining described electric boosting steering system generation oil circuit abnormal failure, can also determine further that the oil circuit what reason causes is unusual, judge situation for the first of in the step 202 among the embodiment 1 the oil circuit abnormal failure being described, described step 303 will be made a concrete analysis of it and cause the unusual reason of oil circuit.
For the first judgement situation of in the step 202 among the embodiment 1 the oil circuit abnormal failure being described, after having determined that electric hydraulic power-assisted steering system generation oil circuit is unusual, further can judge the hydraulic oil distribution valve and turn to hydraulic fluid flow rate between the performance element whether greater than the target oil mass that finds, if greater than, just can determine to cause that the oil circuit abnormal failure occurs electric hydraulic power-assisted steering system reason is that the valve opening of hydraulic oil distribution valve is larger; Otherwise, just can determine to cause that the oil circuit abnormal failure occurs electric hydraulic power-assisted steering system reason is that the valve opening of hydraulic oil distribution valve is less.
Step 304: have fault to occur to staff's alarm.
After definite electric hydraulic power-assisted steering system et out of order, can there be fault to occur to staff's prompting by alarm lamp or the form of blowing a whistle.
Step 305: controller shows the fault type of determining by telltale.
After definite electric hydraulic power-assisted steering system et out of order, the fault type of determining can be shown to the staff by telltale, be convenient to the staff and know which kind of fault has occured electric hydraulic power-assisted steering system, so that the staff implements targetedly maintenance to electric hydraulic power-assisted steering system.
Step 306: the voltage and current to the motor two ends carries out integral operation, obtains the consumption of current of described electric hydraulic power-assisted steering system in Preset Time.
Described controller is after obtaining the working parameter of electric hydraulic power-assisted steering system, can carry out integral operation to the voltage and current at motor two ends, obtain the car load consumption of current in the Preset Time, so that the staff has one reasonably to estimate to the power consumption performance of car load.
Wherein, warning function and Presentation Function all can be integrated in described controller inside in the present embodiment, also can be independent of controller, and the sequencing of warning and function also is not specifically limited.Enforcement for described step 306 not necessarily will be after step 305, as long as implement after the working parameter that has obtained the current time electric hydraulic power-assisted steering system.
The technical scheme of present embodiment not only can realize the beneficial effect that the technical scheme among the embodiment 1 is brought, further, after determining the fault type that electric hydraulic power-assisted steering system occurs, in the present embodiment, can also the fault type of described generation be prompted to chaufeur by alarm lamp, chaufeur just can be made corresponding action for fault alarm like this, such as brake, with the accident of in time avoiding causing because of fault that electric hydraulic power-assisted steering system occurs; In addition, the maintainer can determine the concrete fault that occurs by the demonstration of telltale, can keep in repair targetedly electric hydraulic power-assisted steering system, has saved the time that fault is got rid of and keeped in repair, and has saved labour cost, improves maintenance efficiency.
Accordingly, the present invention also provides a kind of controller, with reference to shown in Figure 4, is the structural representation of a kind of controller provided by the invention, and described controller can comprise:
Receiving element 401, be used for being received in the working parameter of the electric hydraulic power-assisted steering system that current time gathers, described working parameter comprises oil pressure, the hydraulic oil distribution valve between oil mass, electric power steering oil pump and the hydraulic oil distribution valve of management signal, petrol storage tank of valve opening, the high pressure administrative unit of voltage and current, the hydraulic oil distribution valve at motor two ends and turns to hydraulic fluid flow rate between the performance element;
Preferably, with reference to shown in Figure 5, be the structural representation of controller that comprises the structural representation of analytic unit 402, wherein, described analytic unit 402 specifically comprises:
The first judgment sub-unit 501 is used for judging whether described working parameter satisfies the condition of motor open failure, and the condition of described motor open failure is: the voltage at described motor two ends electric current non-vanishing and motor is zero;
First determines subelement 502, when satisfying the condition of motor open failure for described working parameter, determines that the fault type that electric hydraulic power-assisted steering system occurs is that motor disconnects.
The second judgment sub-unit 503, be used for judging whether described working parameter satisfies the condition of high pressure administrative unit CAN bus communication fault, the condition of described high pressure administrative unit CAN bus communication fault is: the valve opening of hydraulic oil distribution valve management signal non-vanishing and the high pressure administrative unit is zero;
Second determines subelement 504, when whether satisfying the condition of high pressure administrative unit CAN bus communication fault for described working parameter, determines that the fault type that electric hydraulic power-assisted steering system occurs is high pressure administrative unit CAN bus communication fault.
The 3rd judgment sub-unit 505 is used for judging whether described working parameter satisfies the condition of branch road or relay fault, and the condition of described branch road or relay fault is: the management signal of described high pressure administrative unit voltages non-vanishing and the motor two ends are zero;
The 3rd determines subelement 506, when whether satisfying the condition of branch road or relay fault for described working parameter, determines that the fault type that electric hydraulic power-assisted steering system occurs is branch road or relay fault.
The 4th judgment sub-unit 508 is used for judging that whether described percentages is less than predetermined threshold value;
The 4th determines subelement 509, and when being used for described percentages less than predetermined threshold value, the fault type of determining the electric hydraulic power-assisted steering system generation is that the oil mass of petrol storage tank is few.
The 5th judgment sub-unit 512 is used for judging whether described difference exceeds default error burst;
The 5th determines subelement 513, is used for described difference and exceeds when presetting error burst, determines that the fault type that electric hydraulic power-assisted steering system occurs is that oil circuit is unusual.
Whether the 6th judgment sub-unit 514 is used for judging the hydraulic oil distribution valve and turns to hydraulic fluid flow rate between the performance element greater than described target oil mass;
The 6th determines subelement 515, when being used for the hydraulic oil distribution valve and turning to hydraulic fluid flow rate between the performance element greater than described target oil mass, determine that the fault type that electric hydraulic power-assisted steering system occurs is that valve opening is larger, at the hydraulic oil distribution valve and when turning to hydraulic fluid flow rate between the performance element less than described target oil mass, determine that the fault type that electric hydraulic power-assisted steering system occurs is that valve opening is less.
Preferably, with reference to shown in Figure 6, described controller can also comprise:
Integral arithmetic unit 601 is used for the voltage and current at motor two ends is carried out integral operation, obtains the consumption of current of described electric hydraulic power-assisted steering system in Preset Time, in order to the car load consumption of current is estimated.
In the technical scheme of present embodiment, by receiving under the current time that gathers, the working parameter of electric hydraulic power-assisted steering system, and thereby described working parameter made a concrete analysis of the fault type that the parts of determining electric hydraulic power-assisted steering system occur, realized the function of electric hydraulic power-assisted steering system fault self-diagnosis.
Further, after determining the fault type that electric hydraulic power-assisted steering system occurs, in the present embodiment, can also the fault type of described generation be prompted to chaufeur by alarm lamp, chaufeur just can be made corresponding action for fault alarm like this, such as brake, with the accident of in time avoiding causing because of fault that electric hydraulic power-assisted steering system occurs; In addition, the maintainer can determine the concrete fault that occurs by the demonstration of telltale, can keep in repair targetedly electric hydraulic power-assisted steering system, has saved the time that fault is got rid of and keeped in repair, and has saved labour cost, improves maintenance efficiency.
Further, the technical scheme of present embodiment is carried out integral operation by the voltage and current to the motor two ends, obtain the consumption of current of described electric hydraulic power-assisted steering system in Preset Time, can estimate the car load consumption of current, in order to grasp the consumption of current of vehicle.
Need to prove that it is inner that the alarm display unit can be integrated in described controller, also can be independent of described controller.
Need to prove, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby not only comprise those key elements so that comprise process, method, article or the equipment of a series of key elements, but also comprise other key elements of clearly not listing, or also be included as the intrinsic key element of this process, method, article or equipment.Do not having in the situation of more restrictions, the key element that is limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
For device embodiment, because it corresponds essentially to embodiment of the method, so relevant part gets final product referring to the part explanation of embodiment of the method.Device embodiment described above only is schematic, wherein said unit as the separating component explanation can or can not be physically to separate also, the parts that show as the unit can be or can not be physical locations also, namely can be positioned at a place, perhaps also can be distributed on a plurality of network elements.Can select according to the actual needs wherein some or all of module to realize the purpose of present embodiment scheme.Those of ordinary skills namely can understand and implement in the situation of not paying creative work.
The above only is the specific embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (16)
1. an electric hydraulic power-assisted steering system method for diagnosing faults is characterized in that, comprising:
Be received in the working parameter of the electric hydraulic power-assisted steering system that current time gathers, described working parameter comprises oil pressure, the hydraulic oil distribution valve between oil mass, electric power steering oil pump and the hydraulic oil distribution valve of management signal, petrol storage tank of valve opening, the high pressure administrative unit of voltage and current, the hydraulic oil distribution valve at motor two ends and turns to hydraulic fluid flow rate between the performance element;
The fault type that occurs according to the parts of described operation parameters analysis electric hydraulic power-assisted steering system.
2. method according to claim 1 is characterized in that, the described fault type that occurs according to the parts of described operation parameters analysis electric hydraulic power-assisted steering system comprises:
Judge whether described working parameter satisfies the condition of motor open failure, the condition of described motor open failure is: the voltage at described motor two ends electric current non-vanishing and motor is zero, if satisfy, determine that then the fault type that electric hydraulic power-assisted steering system occurs is that motor disconnects.
3. method according to claim 1 is characterized in that, the described fault type that occurs according to the parts of described operation parameters analysis electric hydraulic power-assisted steering system comprises:
Judge whether described working parameter satisfies the condition of high pressure administrative unit CAN bus communication fault, the condition of described high pressure administrative unit CAN bus communication fault is: the valve opening of hydraulic oil distribution valve management signal non-vanishing and the high pressure administrative unit is zero, if satisfy, determine that then the fault type that electric hydraulic power-assisted steering system occurs is high pressure administrative unit CAN bus communication fault.
4. method according to claim 1 is characterized in that, the described fault type that occurs according to the parts of described operation parameters analysis electric hydraulic power-assisted steering system comprises:
Judge whether described working parameter satisfies the condition of branch road or relay fault, the condition of described branch road or relay fault is: the management signal of described high pressure administrative unit voltages non-vanishing and the motor two ends are zero, if satisfy, determine that then the fault type that electric hydraulic power-assisted steering system occurs is branch road or relay fault.
5. method according to claim 1 is characterized in that, the described fault type that occurs according to the parts of described operation parameters analysis electric hydraulic power-assisted steering system comprises:
The oil mass of described petrol storage tank is converted into percentages;
Whether judge described percentages less than predetermined threshold value, if the fault type of then determining the electric hydraulic power-assisted steering system generation is that the oil mass of petrol storage tank is few.
6. method according to claim 1 is characterized in that, the described fault type that occurs according to the parts of described operation parameters analysis electric hydraulic power-assisted steering system comprises:
In the matching relationship figure that prestores, search with described working parameter in the valve opening of hydraulic oil distribution valve identical with the oil pressure between electric power steering oil pump and the hydraulic oil distribution valve or in default error limit immediate target oil pressure and target valve aperture;
If find, then will and turn to the hydraulic fluid flow rate between the performance element to subtract each other corresponding to target flow and the hydraulic oil distribution valve in the described working parameter of described target oil pressure and target valve aperture, to obtain difference;
Judge whether described difference exceeds default error burst, if exceed, determine that then the fault type that electric hydraulic power-assisted steering system occurs is that oil circuit is unusual.
7. method according to claim 6 is characterized in that, describedly judges whether described difference exceeds default error burst, if exceed, then determine fault type that electric hydraulic power-assisted steering system occurs be oil circuit unusual after, also comprise:
Judge the hydraulic oil distribution valve and turn to hydraulic fluid flow rate between the performance element whether greater than described target oil mass, if greater than, determine that then the fault type that electric hydraulic power-assisted steering system occurs is that valve opening is larger;
If less than, determine that then the fault type that electric hydraulic power-assisted steering system occurs is that valve opening is less.
8. method according to claim 1 is characterized in that, described method also comprises:
Voltage and current to the motor two ends carries out integral operation, obtains the consumption of current of described electric hydraulic power-assisted steering system in Preset Time, in order to the car load consumption of current is estimated.
9. a controller is characterized in that, described controller comprises:
Receiving element, be used for being received in the working parameter of the electric hydraulic power-assisted steering system that current time gathers, described working parameter comprises oil pressure, the hydraulic oil distribution valve between oil mass, electric power steering oil pump and the hydraulic oil distribution valve of management signal, petrol storage tank of valve opening, the high pressure administrative unit of voltage and current, the hydraulic oil distribution valve at motor two ends and turns to hydraulic fluid flow rate between the performance element;
Analytic unit is used for the fault type according to the parts generation of described operation parameters analysis electric hydraulic power-assisted steering system.
10. controller according to claim 9 is characterized in that, if the motor open failure occurs, described analytic unit specifically comprises:
The first judgment sub-unit is used for judging whether described working parameter satisfies the condition of motor open failure, and the condition of described motor open failure is: the voltage at described motor two ends electric current non-vanishing and motor is zero;
First determines subelement, when satisfying the condition of motor open failure for described working parameter, determines that the fault type that electric hydraulic power-assisted steering system occurs is that motor disconnects.
11. controller according to claim 9 is characterized in that, if high pressure administrative unit CAN bus communication fault occurs, described analytic unit specifically comprises:
The second judgment sub-unit, be used for judging whether described working parameter satisfies the condition of high pressure administrative unit CAN bus communication fault, the condition of described high pressure administrative unit CAN bus communication fault is: the valve opening of hydraulic oil distribution valve management signal non-vanishing and the high pressure administrative unit is zero;
Second determines subelement, when whether satisfying the condition of high pressure administrative unit CAN bus communication fault for described working parameter, determines that the fault type that electric hydraulic power-assisted steering system occurs is high pressure administrative unit CAN bus communication fault.
12. controller according to claim 9 is characterized in that, if branch road or relay fault occur, then described analytic unit specifically comprises:
The 3rd judgment sub-unit is used for judging whether described working parameter satisfies the condition of branch road or relay fault, and the condition of described branch road or relay fault is: the management signal of described high pressure administrative unit voltages non-vanishing and the motor two ends are zero;
The 3rd determines subelement, when whether satisfying the condition of branch road or relay fault for described working parameter, determines that the fault type that electric hydraulic power-assisted steering system occurs is branch road or relay fault.
13. controller according to claim 9 is characterized in that, if the few fault of the oil mass of petrol storage tank occurs, then described analytic unit specifically comprises:
The conversion subelement is used for the oil mass of described petrol storage tank is converted into percentages;
The 4th judgment sub-unit is used for judging that whether described percentages is less than predetermined threshold value;
The 4th determines subelement, and when being used for described percentages less than predetermined threshold value, the fault type of determining the electric hydraulic power-assisted steering system generation is that the oil mass of petrol storage tank is few.
14. controller according to claim 9 is characterized in that, if the oil circuit abnormal failure occurs, then described analytic unit specifically comprises:
Search subelement, be used for the matching relationship figure that prestores search with described working parameter in the valve opening of hydraulic oil distribution valve identical with the oil pressure between electric power steering oil pump and the hydraulic oil distribution valve or presetting immediate target oil pressure and target valve aperture in the error limit;
Computation subunit, be used for when finding target oil pressure and target valve aperture, to and turn to the hydraulic fluid flow rate between the performance element to subtract each other corresponding to target flow and the hydraulic oil distribution valve in the described working parameter of described target oil pressure and target valve aperture, to obtain difference;
The 5th judgment sub-unit is used for judging whether described difference exceeds default error burst;
The 5th determines subelement, is used for described difference and exceeds when presetting error burst, determines that the fault type that electric hydraulic power-assisted steering system occurs is that oil circuit is unusual.
15. controller according to claim 14 is characterized in that, described analytic unit also comprises:
Whether the 6th judgment sub-unit is used for judging the hydraulic oil distribution valve and turns to hydraulic fluid flow rate between the performance element greater than described target oil mass;
The 6th determines subelement, when being used for the hydraulic oil distribution valve and turning to hydraulic fluid flow rate between the performance element greater than described target oil mass, determine that the fault type that electric hydraulic power-assisted steering system occurs is that valve opening is larger, at the hydraulic oil distribution valve and when turning to hydraulic fluid flow rate between the performance element less than described target oil mass, determine that the fault type that electric hydraulic power-assisted steering system occurs is that valve opening is less.
16. controller according to claim 9 is characterized in that, described controller also comprises:
Integral arithmetic unit is used for the voltage and current at motor two ends is carried out integral operation, obtains the consumption of current of described electric hydraulic power-assisted steering system in Preset Time, in order to the car load consumption of current is estimated.
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| CN201210536562.9A CN102975766B (en) | 2012-12-12 | 2012-12-12 | Electric hydraulic power-assisted steering system failure diagnosing method and controller |
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