CN104937286B - Credence test method - Google Patents

Credence test method Download PDF

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Publication number
CN104937286B
CN104937286B CN201380070946.9A CN201380070946A CN104937286B CN 104937286 B CN104937286 B CN 104937286B CN 201380070946 A CN201380070946 A CN 201380070946A CN 104937286 B CN104937286 B CN 104937286B
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China
Prior art keywords
drive device
fluid pressure
type secondary
secondary drive
pressure type
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Expired - Fee Related
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CN201380070946.9A
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CN104937286A (en
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A·西门子
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/08—Prime-movers comprising combustion engines and mechanical or fluid energy storing means
    • B60K6/12—Prime-movers comprising combustion engines and mechanical or fluid energy storing means by means of a chargeable fluidic accumulator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/50—Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
    • B60W50/0205—Diagnosing or detecting failures; Failure detection models
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • F15B19/005—Fault detection or monitoring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
    • B60W50/0205—Diagnosing or detecting failures; Failure detection models
    • B60W2050/0215—Sensor drifts or sensor failures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/06—Combustion engines, Gas turbines
    • B60W2510/0666—Engine power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/09—Other types of propulsion units, e.g. fluid motors, or type not specified
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/10—Change speed gearings
    • B60W2510/1035—Input power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/10—Change speed gearings
    • B60W2510/1075—Change speed gearings fluid pressure, e.g. oil pressure
    • B60W2510/1085—Change speed gearings fluid pressure, e.g. oil pressure pressure of working fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/30—Auxiliary equipments
    • B60W2510/305—Power absorbed by auxiliaries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2306/00—Other features of vehicle sub-units
    • B60Y2306/15—Failure diagnostics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/50—Monitoring, detection and testing means for accumulators
    • F15B2201/51—Pressure detection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20507—Type of prime mover
    • F15B2211/20523—Internal combustion engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20569—Type of pump capable of working as pump and motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/88—Control measures for saving energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Transportation (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Control Of Transmission Device (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

The present invention relates to a kind of Credence test method for being used to examine pressure value confidence level, the pressure value utilizes the sensor device (32 in hydraulic system, 33) detect, the hydraulic system includes primary drive device (11) and fluid pressure type secondary drive device (12), and fluid pressure type secondary drive device is connected in terms of driving with primary drive device (11).In order to propose a kind of Credence test method that simply can inexpensively test, the power P 0 of primary drive device (11) and the power P 1 of fluid pressure type secondary drive device (12) are tried to achieve and used, to examine the confidence level of the pressure value by sensor device (32,33) detection in the output end of fluid pressure type secondary drive device (12).

Description

Credence test method
Technical field
The present invention relates to a kind of Credence test method for being used to examine pressure value confidence level, the pressure value utilizes hydraulic pressure Sensor device in system detects, and the hydraulic system includes primary drive device and fluid pressure type secondary drive device, institute Fluid pressure type secondary drive device is stated to be connected with the primary drive device in terms of driving.To have in addition, the present invention relates to one kind The computer program product of computer program, when the computer program is run on computers, the computer program production Product have the software service for being used for carrying out the Credence test method.In addition, the present invention relates to a kind of with hydraulic system Fluid pressure drive device, the Credence test method is carried out in the hydraulic system.
Background technology
In hydraulic system, played an important role in terms of the viewpoint of regulation technology, control technology and/or monitoring technology It is, it is necessary to know pressure.The pressure can for example be detected using pressure sensor.It is vital in order to identify and run Deviation, sensor fault or undesirable skew to the pressure value detected using pressure sensor, it is necessary to carry out confidence level Examine.
The content of the invention
It is an object of the present invention to a kind of Credence test method is proposed, can letter using the Credence test method Single ground and the confidence level for inexpensively examining pressure value, the pressure value using the hydraulic sensing device in hydraulic system come Detection.Hydraulic system includes primary drive device and fluid pressure type secondary drive device, and the fluid pressure type secondary drive device is driving Dynamic aspect is connected with primary drive device.
A kind of in examining the Credence test method of pressure value confidence level, the pressure value to be utilized in hydraulic system Sensor device detect, the hydraulic system includes primary drive device and fluid pressure type secondary drive device, the hydraulic pressure Formula secondary drive device is connected according to the mode of driving with primary drive device, and the purpose is led in the Credence test method Cross following manner realization, i.e., the power P 0 of primary drive device and the power P 1 of secondary drive device are tried to achieve and used, with Just the confidence level of the pressure value in the output end of fluid pressure type secondary drive device by sensor device detection is examined.Fluid pressure type Level drive device is the hydraulic press for having pumping function and motor function.Hydraulic press can for example be configured to axial piston machine.At this Show in the range of invention, the power of power and fluid pressure type secondary drive device by primary drive device can simply simultaneously And inexpensively examine with the pressure value of sensor device, the detection of such as pressure sensor.Examined by the confidence level of the present invention Proved recipe method is notable by means of the power-balance on fluid pressure type secondary drive device or balance with method in a straightforward manner Ground, which simplifies, is applied to fluid pressure type secondary drive device, the particularly output end of the hydraulic press with pumping function, particularly high pressure Pressure on side continuously determines.Therefore, the pressure sensor of redundancy required in other cases can be cancelled or more expended Signal Credence test.
One preferred embodiment of Credence test method is characterised by that the power P 1 of secondary drive device is considering to damage Calculated in the case of consumption according to the power P 0 exported by primary drive device.Do not have additionally at branch's transmission device at those In the operating point of power or only known power drain, the power P 1 of secondary drive device can be lost, especially in consideration Be transmission device loss and/or arrangement of clutch be lost in the case of know or ask from the power output P0 of primary drive device .
One other preferred embodiment of Credence test method is characterised by, described to be exported by primary drive device Power P 0 tried to achieve from known operational factor.Known operational factor is, for example, emitted dose, air parameter, rotating speed and this one kind Parameter.Power P 0 and if necessary power P 1 can be tried to achieve or calculated in the control unit of interior of motor vehicles.
One other preferred embodiment of Credence test method is characterised by, the fluid pressure type secondary drive device Effective torque M1 tried to achieve by means of the equation below (1)：
M1=P1/n1=P0/n1=M0*n0/n1 (1).
Here, n0 represents the rotating speed of primary drive device.N1 represents the rotating speed of fluid pressure type secondary drive device.M0 represent from The moment of torsion that the deduction exported by primary drive device is lost.
One other preferred embodiment of Credence test method is characterised by, is filled in the fluid pressure type secondary drive For fluid pressure type secondary drive device between the moment of torsion M1 put and the hydraulic pressure difference dp on fluid pressure type secondary drive device Constant degree of regulation vg has strong almost linear relation.The degree of regulation vg of fluid pressure type secondary drive device is, for example, to have pump The angle of oscillation of the hydraulic press of function and motor function, particularly axial piston machine.Degree of regulation vg can hydraulic press operation in quilt Measurement.Hydraulic pressure difference dp is the pressure differential between the output end of fluid pressure type secondary drive device and input.Fluid pressure type is secondary Pressure in the output end of drive device is also referred to as high pressure.Similarly, the pressure on the input of fluid pressure type secondary drive device Referred to as low pressure.
One other preferred embodiment of Credence test method is characterised by that fluid pressure type secondary drive device has Effect moment of torsion M1 is tried to achieve by means of the equation below (3)：
M1=vg*dp*k+MLeak(vg, dp, n) (3).
Party's formula (3) includes clearly linear parsing part by vg*dp*k.
Here, COEFFICIENT K is the constant determined by measurement or geometric data.MLeakRepresent loss moment of torsion/friction torque and Therefore represent and the deviation of linear relationship, the deviation can be for example stored in combined characteristic.
One other preferred embodiment of Credence test method is characterised by, is tried to achieve by means of equation (3) Formulation relation is deposited or stored for example in the form of combined characteristic.The formulation relation represented in equation (3) can To keep univocality by reverse transformation and on pressure and moment of torsion.Therefore, the relation and reverse-power can be for example used as comprehensive Characteristic curve is closed to preserve in a control unit.
One other preferred embodiment of Credence test method is characterised by, fluid pressure type secondary drive device it is defeated The physical pressure gone out on end is tried to achieve by means of the equation below：
P=dp (M1, vg, n)-pND (5)。
Here, pNDRepresent the pressure on the input of secondary drive device.The pressure is also referred to as low pressure.By means of equation The physical pressure p that formula (5) calculates is very accurate for stable state and quasi-stationary operation.It is necessary in the case of high dynamic The inertia in consideration system if necessary in power-balance.
In addition, the present invention relates to a kind of computer program product with computer program, the computer program product With the software service for implementing foregoing Credence test method when computer program is run on computers.Computer can be with The e.g. control unit of interior of motor vehicles.
In addition, the present invention relates to a kind of fluid pressure drive device with hydraulic system, before being carried out in the hydraulic system The Credence test method stated.Fluid pressure drive device is preferably configured to moveable fluid pressure drive device and for representing liquid Press hybrid electric vehicle.
Brief description of the drawings
Other advantages, feature and the details of the present invention is shown that in the explanation, refer to the attached drawing is in detail by the description below Illustrate different embodiments.
In unique accompanying drawing, in order to being illustrated according to the Credence test method of the present invention, show with greatly simplifying Go out the part of for example moveable fluid pressure drive device.
Embodiment
Moveable fluid pressure drive device 10 is shown, it has primary drive device 11 and fluid pressure type secondary drive in accompanying drawing Device 12.Primary drive device 11 is also known as the internal combustion engine 15 of internal combustion motor.Fluid pressure type secondary drive device 12 is that have The hydraulic press 16 of pumping function and motor function.Hydraulic press 16 is advantageously configured as axial piston machine.The fuel delivery of hydraulic press 16 is It is adjustable.The degree of regulation attached troops to a unit hereinafter is represented with vg.
Shown by arrow 17 and 18, primary drive device 11 connects in terms of driving with fluid pressure type secondary drive device 12 Connect.Here, primary drive device 11 can be used for driving fluid pressure type secondary drive device 12.But fluid pressure type secondary drive device 12 can be used for driving primary drive device 11.Shown between arrow 17 and 18 by symbol 20, can be in terms of driving Additional drive device/slave unit, transmission dress are accessed between primary drive device 11 and fluid pressure type secondary drive device 12 Put, (mechanical) speed change gear, branched power.
Fluid pressure type secondary drive device 12 or hydraulic press 16 are connected in low-pressure side with hydraulic medium memory 23.Pass through arrow First 24 show, are pumped out hydraulic medium and defeated from hydraulic medium container 23 using the hydraulic press 16 in its pumping function It is sent in the accumulator 25 on high-pressure side.
Accumulator 25 is used to store with the hydraulic medium of pressure, particularly high pressure loading.By memory valve 26 according to need The hydraulic medium loaded with high pressure can be exported from accumulator 25.The hydraulic pressure with high pressure loading come from accumulator 25 is situated between Mass-energy be enough in driving be in motor function in hydraulic press 16 and/or for other hydraulic presses in drive system or consumption Device.
By connecting hydraulic lines 28 can make other hydraulic units, particularly hydraulic consumers device and/or hydraulic motor with Hydraulic press 16 or the output end of fluid pressure type secondary drive device 12 or high-pressure side connection.
Shown by rectangle symbols 31, the pressure of the also referred to as low pressure in hydraulic medium memory 23 utilizes suitable pressure Sensor detects.Shown by an other rectangle symbols 32, the high pressure in accumulator 25 can also utilize suitable pressure Force snesor detects.Show that the high pressure in the connecting pipe 28 of hydraulic pressure is also by conjunction by an other rectangle symbols 33 Suitable pressure sensor detects.
Physics pressure p is produced on the point 35 adjacent with rectangle symbols 33, the physical pressure can be by means of following Credence test method is tried to achieve.Here, alphabetical P is used to represent power.Alphabetical M is used to represent moment of torsion.Alphabetical n is used to represent to turn Speed.Alphabetical p is used to represent pressure.In detail, alphanumeric used in the equation below (1 to 5) has following implications：
The power of P0=primary drive device 11 or internal combustion engine 15；
The power of P1=fluid pressure type secondary drives device 12 or hydraulic press 16；
The moment of torsion of M0=primary drive device 11 or internal combustion engine 15, deduct loss；
The effective torque of M1=fluid pressure type secondary drives device 12 or hydraulic press 16；
The rotating speed of n0=primary drive device 11 or internal combustion engine 15；
The rotating speed of n1=fluid pressure type secondary drives device 12 or hydraulic press 16；
The degree of regulation of vg=hydraulic presses 16；
Dp=pressure differentials；
P=physical pressures；
pND=low pressure；
MLeak=loss moment of torsion/friction torque；
K=constants.
The Credence test method of the present invention allows to determine the physical pressure p on the point 35 in hydraulic system, the hydraulic pressure System is simplifiedly shown in the accompanying drawings.The Credence test method of the present invention is used for the pressure value to being detected by pressure sensor 33 It is monitored or Credence test.
Therefore, it is possible to continuously be determined in liquid by means of the power-balance on hydraulic press 16 with method in a straightforward manner The pressure applied on the high-pressure side of press 16.The signal that additional, redundancy pressure sensor can be cancelled or more expended is credible Degree is examined.
Credence test method can be advantageously applied in the hybrid drive of series connection, such as one therein Divide and simplifiedly show in the accompanying drawings.Here, hydraulic press 16 is driven in its pumping function by internal combustion engine 15, so as in the hydraulic press Output end on produce pressure or volume flow.
Credence test method rises in the case where can clearly calculate the physical relation between pump moment of torsion and hydraulic pressure Effect, such as such case are in the axial piston regulation machine with wobble-plate, particularly axial piston motor or axial piston In pump or in the hydraulic press with adjustable swinging axle, particularly pump.Particularly existed by hydraulic press 16 on condition that knowing The power received in its pumping function.
Those on branch's transmission device additionally without the operating point of power or only known power drain in, The power P 1 of hydraulic press 16 can be in the case where considering transmission device/clutch loss by internal combustion engine machine or internal combustion motor 15 Known to power output P0.Power P 0 and power P 1 is calculated by emitted dose, air parameter, rotating speed etc. in a control unit if necessary.
Hydraulic press 16 can be determined therefrom that by known the rotating speed n0 and hydraulic press 16 of internal combustion motor 15 rotating speed n1 Effective torque M1.It is applicable in the case where ignoring loss：
M1=P1/n1=P0/n1=M0*n0/n1 (1).
Between pressure differential dp on the moment of torsion and hydraulic press 16 of hydraulic press 16, i.e. between low pressure and high pressure, for constant Angle of oscillation or degree of regulation vg strong, almost linear relation be present.The actual angle of oscillation or conciliation degree vg of hydraulic press 16 can be with Measured.
Following general relations are applicable for the degree of regulation vg, pressure differential dp and effective torque M1 of hydraulic press 16：
M1=M (vg, dp, n) (2),
Or with clearly linear parsing part：
M1=vg*dp*k+MLeak(vg, dp, n) (3).
Here, coefficient k is the constant determined by measurement or geometric data.MLeakBe loss moment of torsion/friction torque and because This is the deviation of linear relationship, and the deviation can be for example stored in combined characteristic.
The relation can remain univocality with reverse transformation and on pressure and moment of torsion.Therefore, the relation can be with Such as preserve in combined characteristic in a control unit.It is then relevant with degree of regulation, rotating speed and the moment of torsion of preservation to be：
Dp=dp (M1, vg, n) (4).
If such as learn low pressure p by low pressure sensor 31 or by estimationND, then physical pressure p can be determined such as Under：
P=dp (M1, vg, n)-pND (5)。
Described calculate for stable state and quasi-stationary operation is very accurate.Must be in work(in the case of high dynamic Inertia in consideration system if necessary when rate balances.Inertia in system is, for example, the rotary inertia and hydraulic press 16 of transmission device Rotary inertia either regulating system etc. inertia.
If in high pressure, another pressure sensor 32, two sensors 32 and 33 in accumulator 25 for example be present Can also mutually it be examined in the case where memory valve 26 is opened.Two pressures detected by sensor 32 and 33 mutually examined Force value can be compared with the physical pressure p tried to achieve by foregoing Credence test method.It is then possible to use the comparison As a result, to match or learn into the peer machine combined characteristic and the peer machine, only If being considered as error free by the pressure value that sensor 32,33 detects.

Claims (8)

1. a kind of Credence test method for being used to examine pressure value confidence level, the pressure value utilize the sensing in hydraulic system Device device (32,33) detects, and the hydraulic system includes primary drive device (11) and fluid pressure type secondary drive device (12), The fluid pressure type secondary drive device is connected in terms of driving with the primary drive device (11), it is characterised in that is tried to achieve simultaneously And using the power P 0 of the primary drive device (11) and the power P 1 of the fluid pressure type secondary drive device (12), to examine Test the pressure value in the output end of the fluid pressure type secondary drive device (12) by the sensor device (32,33) detection Confidence level,
The effective torque M1 of the fluid pressure type secondary drive device (12) is in the case where ignoring loss by means of the equation below (1) try to achieve：
M1=P1/n1=P0/n1=M0*n0/n1 (1),
Wherein, n0 represents the rotating speed of the primary drive device, and n1 represents the rotating speed of the fluid pressure type secondary drive device, M0 tables Show the moment of torsion being lost from the deduction by the primary drive device output,
The physical pressure p of the output end of the fluid pressure type secondary drive device (12) is tried to achieve by means of the equation below (5)：
P=dp (M1, vg, n)-pND(5),
Wherein, pNDRepresent the pressure on the input of the secondary drive device.
2. Credence test method according to claim 1, it is characterised in that the fluid pressure type secondary drive device (12) The power P 1 calculated in the case where considering to be lost according to the power P 0 by primary drive device (11) output.
3. Credence test method according to any one of the preceding claims, it is characterised in that by the primary driving The power P 0 of device (11) output is tried to achieve according to known operational factor.
4. Credence test method according to claim 1, it is characterised in that in the fluid pressure type secondary drive device (12) for the liquid between effective torque M1 and the hydraulic pressure difference dp on the fluid pressure type secondary drive device (12) The constant degree of regulation vg of pressure type secondary drive device (12) has strong almost linear relation.
5. described Credence test method according to claim 1, it is characterised in that the fluid pressure type secondary drive device (12) effective torque M1 is tried to achieve by means of the equation below (3)：
M1=M (vg, dp, n) or
M1=vg*dp*k+MLeak(vg, dp, n) (3),
Wherein, coefficient k is the constant determined by measurement or geometric data, and n represents rotating speed, MLeakLoss moment of torsion/friction is represented to turn round Square.
6. described Credence test method according to claim 4, it is characterised in that the fluid pressure type secondary drive device (12) effective torque M1 is tried to achieve by means of the equation below (3)：
M1=M (vg, dp, n) or
M1=vg*dp*k+MLeak(vg, dp, n) (3),
Wherein, coefficient k is the constant determined by measurement or geometric data, and n represents rotating speed, MLeakLoss moment of torsion/friction is represented to turn round Square.
7. Credence test method according to claim 5, it is characterised in that the formula tried to achieve by means of equation (3) Change relation and reverse-power：Dp=dp (M1, vg, n) is deposited or stored in the form of combined characteristic.
8. a kind of fluid pressure drive device with hydraulic system, implement to appoint according in preceding claims in the hydraulic system Credence test method described in one.
CN201380070946.9A 2012-11-20 2013-11-07 Credence test method Expired - Fee Related CN104937286B (en)

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DE102012221127.6A DE102012221127A1 (en) 2012-11-20 2012-11-20 Plausibility examination procedure
PCT/EP2013/073227 WO2014079692A1 (en) 2012-11-20 2013-11-07 Plausibility checking method

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