CN104179752B - The Performance Test System of hydraulic control unit in a kind of brake system of car - Google Patents
The Performance Test System of hydraulic control unit in a kind of brake system of car Download PDFInfo
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- CN104179752B CN104179752B CN201410354112.7A CN201410354112A CN104179752B CN 104179752 B CN104179752 B CN 104179752B CN 201410354112 A CN201410354112 A CN 201410354112A CN 104179752 B CN104179752 B CN 104179752B
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Abstract
The present invention relates to the Performance Test System of hydraulic control unit in a kind of brake system of car, belong to the component technical field of quality detection of automobile chassis dynamics Controlling.This test system comprises pressure lifting device, hydraulic plumbing system, control and measure device and environment simulator, and each several part of test system is connected by pipeline.The Performance Test System of hydraulic control unit in the brake system of car that the present invention proposes, can test accurately to parameters such as the volumes of the flow of the speed of response of hydraulic control unit (HCU) valve and sealing thereof, plunger pump and boosting capability thereof, accumulator.
Description
Technical field
The present invention relates to the Performance Test System of hydraulic control unit in a kind of brake system of car, belong to the component technical field of quality detection of automobile chassis dynamics Controlling.
Background technique
In order to improve vehicle performance, Hyundai Motor is equipped with electronic stabilizing control system (ESC) and anti-blocking brake system (ABS), and wherein hydraulic control unit (hereinafter referred to as HCU) is these two topmost function executor of system.Hydraulic control unit (HCU) is assembled by high-speed switch electromagnetic valve, plunger pump and accumulator and forms.Wherein, the speed of response of high-speed switch electromagnetic valve and sealing, the pumping ability of plunger pump, and the volume etc. of accumulator are the indexs evaluating hydraulic control unit (HCU) ride quality.Full test is carried out to the performance of hydraulic control unit, in the research and development and production process of hydraulic control unit (HCU), has important meaning.
At present, to the detection of hydraulic control unit (HCU) mainly in production line, by the method vacuumized single hydraulic control unit (HCU), the sealing of hydraulic control unit is tested.This method efficiency is high, but content measurement is single, and because tested media is air instead of brake fluid, so hydraulic control unit (HCU) sealability under actual operating conditions can accurately do not reflected.
At present, to the measurement of hydraulic control unit (HCU) accumulator actual volume, be generally by orcible entry accumulator chamber plug, calculate accumulator volume by actual measurement accumulator piston diameter and stroke.The inadequate fast and easy of this method, and have irreversible destruction for hydraulic control unit, can only inspect by random samples product.
Summary of the invention
The object of the invention is the Performance Test System proposing hydraulic control unit in a kind of brake system of car, the Performance Test System of existing hydraulic control unit is improved, to realize all round properties test of auto brake system hydraulic control unit (HCU).
In the brake system of car that the present invention proposes, the Performance Test System of hydraulic control unit, comprises pressure lifting device, hydraulic plumbing system, control and measure device and environment simulator;
Described pressure lifting device comprises fuel tank, variable displacement pump, servo proportion, accumulator, the first pneumatic ball valve and the second pneumatic ball valve, the entrance of described servo proportion is connected with fuel tank with variable displacement pump successively by working line, and the outlet of servo proportion is connected with the second pneumatic ball valve with the first pneumatic ball valve respectively by working line;
Described hydraulic plumbing system comprises the first simulation master cylinder, second simulation master cylinder, first displacement transducer, second displacement sensor, first oil can, second oil can, 3rd pneumatic ball valve, 4th pneumatic ball valve, 5th pneumatic ball valve, 6th pneumatic ball valve, first pressure transducer, second pressure transducer, hydraulic control unit (HCU), 3rd pressure transducer, 4th pressure transducer, 5th pressure transducer, 6th pressure transducer, 7th pneumatic ball valve, 8th pneumatic ball valve, 9th pneumatic ball valve, tenth pneumatic ball valve, first hydraulic pressure steel cylinder, second hydraulic pressure steel cylinder, 3rd hydraulic pressure steel cylinder and the 4th hydraulic pressure steel cylinder, the back cavity oil inlet of the first described simulation master cylinder is connected with the first pneumatic ball valve by working line, and the back cavity oil inlet of the second simulation master cylinder is connected with the second pneumatic ball valve by working line, the first described simulation piston of master cylinder and the measuring end of the first displacement transducer are connected, and the second simulation piston of master cylinder and the measuring end of second displacement sensor are connected, the first described oil can is connected with the first front cavity oil inlet simulating master cylinder with the 3rd pneumatic ball valve successively by working line, and the second oil can is simulated master cylinder front cavity oil inlet with the 4th pneumatic ball valve and second successively by working line and is connected, the ante-chamber oil outlet of the first described simulation master cylinder is connected with the first filler opening of hydraulic control unit (HCU) with the 5th pneumatic ball valve, the first pressure transducer successively by working line, and the ante-chamber oil outlet of the second simulation master cylinder is connected with the second filler opening of hydraulic control unit (HCU) with the 6th pneumatic ball valve, the second pressure transducer successively by working line, first oil outlet of described hydraulic control unit (HCU) by working line successively with the 3rd pressure transducer, 7th pneumatic ball valve is connected with the first hydraulic pressure steel cylinder, second oil outlet of hydraulic control unit (HCU) by working line successively with the 4th pressure transducer, 8th pneumatic ball valve is connected with the second hydraulic pressure steel cylinder, 3rd oil outlet of hydraulic control unit (HCU) by working line successively with the 5th pressure transducer, 9th pneumatic ball valve is connected with the 3rd hydraulic pressure steel cylinder, 4th oil outlet of hydraulic control unit (HCU) by working line successively with the 6th pressure transducer, tenth pneumatic ball valve is connected with the 4th hydraulic pressure steel cylinder,
The back cavity oil outlet of the first described simulation master cylinder is connected with the 12 pneumatic ball valve by gas exhaust piping jointly with the back cavity oil outlet of the second simulation master cylinder, and the 12 pneumatic ball valve is connected with fuel tank by gas exhaust piping; The first described hydraulic pressure steel cylinder, the second hydraulic pressure steel cylinder, the 3rd hydraulic pressure steel cylinder and the 4th hydraulic pressure steel cylinder are connected with the filler opening of exhaust metering pump jointly by gas exhaust piping, the oil outlet of exhaust metering pump is connected with the 11 pneumatic ball valve by gas exhaust piping, and the 11 pneumatic ball valve simulates the front cavity oil inlet of master cylinder respectively with first by gas exhaust piping and the second front cavity oil inlet simulating master cylinder is connected;
Described control and measure device is a process control machine controlled the test process of hydraulic control unit, the output port of process control machine by signaling line respectively with variable displacement pump, servo proportion, first pneumatic ball valve, second pneumatic ball valve, 3rd pneumatic ball valve, 4th pneumatic ball valve, 5th pneumatic ball valve, 6th pneumatic ball valve, hydraulic control unit (HCU), 7th pneumatic ball valve, 8th pneumatic ball valve, 9th pneumatic ball valve, tenth pneumatic ball valve, exhaust metering pump, 11 pneumatic ball valve is connected with the 12 pneumatic ball valve, the input port of process control machine by signaling line respectively with the first displacement transducer, second displacement sensor, first pressure transducer, second pressure transducer, 3rd pressure transducer, 4th pressure transducer, 5th pressure transducer, 6th pressure transducer is connected with vibration transducer, described vibration transducer mechanical attachment is on the housing of hydraulic control unit (HCU),
Described environment simulator is a high-low temperature test chamber, is arranged by the proportional space of working line, and hydraulic control unit (HCU) and the working line be connected with hydraulic control unit (HCU) are placed in high-low temperature test chamber.
The Performance Test System of hydraulic control unit in the brake system of car that the present invention proposes, its advantage is:
1, the Performance Test System of hydraulic control unit in the brake system of car that proposes of the present invention, the hydraulic power unit with hydraulic accumulator is adopted to provide pressure source, pressure regulates fast and stable, and master cylinder pressure can not change with piston displacement, can provide precise and stable back pressure for test.
2, the Performance Test System of hydraulic control unit in the brake system of car that proposes of the present invention, adopt steel cylinder as simulation wheel cylinder, almost do not have rubber pressure part in system, the volume rigidity of system is stablized, and the pressure-volume characteristics linearity degree of system is high.Therefore the system precision of testing hydraulic control unit is high, favorable repeatability.
3, the Performance Test System of hydraulic control unit in the brake system of car that proposes of the present invention, two identical master cylinders are adopted to be connected with two filler openings of hydraulic control unit (HCU) respectively, achieve the independent test of two cover brake circuits in hydraulic control unit (HCU), improve testing precision.
4, the Performance Test System of hydraulic control unit in the brake system of car that proposes of the present invention, can in same system the flow of the pump of testing hydraulic control unit, pump active boost ability, the sealing of valve, the response time of valve and accumulator volume, test method is succinctly feasible, can record accurate data according to method.
5, the Performance Test System of hydraulic control unit in the brake system of car that proposes of the present invention, can record the actual performance data of hydraulic control unit (HCU).Performance data is as the fundamental performance parameter of hydraulic control unit (HCU), and can provide basic basis for the algorithm development of automobile electron stabilization control system, data can reduce debugging work load accurately, boosting algorithm control effects.
6, the Performance Test System of hydraulic control unit in the brake system of car that proposes of the present invention, not needing to carry out any transformation to tested hydraulic control unit (HCU), is non-destructive testing.The test system that the present invention proposes can provide quality of product non-destructive inspection for hydraulic control unit (HCU) production line.
7, the Performance Test System of hydraulic control unit in the brake system of car that proposes of the present invention, adopts the simulation master cylinder with measuring shift piston, under increasing the prerequisite of cost, achieves the high-acruracy survey of small pulse flow in little amplitude.There is good practicability and Economy.
8, the Performance Test System of hydraulic control unit in the brake system of car that proposes of the present invention, adopt two loop capable of circulation, pressure lifting device is independently a loop, and hydraulic plumbing system is independently a loop.Brake fluid in pressure lifting device is due to the continuous stirring of variable displacement pump, oil temperature can raise rapidly, but because pressure lifting device is independently a loop, high-temperature brake liquid can not flow to measurand hydraulic control unit (HCU), can not directly change test temperature condition.And hydraulic plumbing system is independently a loop, so brake fluid in loop can inner loop, the brake fluid of hydraulic control unit (HCU) inside perfusion can be upgraded fast, with the efficiency of proof test.
9, the Performance Test System of hydraulic control unit in the brake system of car that proposes of the present invention, can test accurately to parameters such as the volumes of the flow of the speed of response of hydraulic control unit (HCU) valve and sealing thereof, plunger pump and boosting capability thereof, accumulator.
Accompanying drawing explanation
Fig. 1 is hydraulic control unit Performance Test System structural representation of the present invention.
In Fig. 1, 1 is fuel tank, 2 is variable displacement pumps, 3 is accumulators, 4 is servo proportions, 5 is first pneumatic ball valves, 6 is second pneumatic ball valves, 7 is first simulation master cylinders, 8 is second simulation master cylinders, 9 is first displacement transducers, 10 is second displacement sensors, 11 is first oil cans, 12 is second oil cans, 13 is the 3rd pneumatic ball valves, 14 is the 4th pneumatic ball valves, 15 is the 5th pneumatic ball valves, 16 is the 6th pneumatic ball valves, 17 is first pressure transducers, 18 is second pressure transducers, 19 is hydraulic control unit (HCU), 20 is the 3rd pressure transducers, 21 is the 4th pressure transducers, 22 is the 5th pressure transducers, 23 is the 6th pressure transducers, 24 is the 7th pneumatic ball valves, 25 is the 8th pneumatic ball valves, 26 is the 9th pneumatic ball valves, 27 is the tenth pneumatic ball valves, 28 is first hydraulic pressure steel cylinders, 29 is second hydraulic pressure steel cylinders, 30 is the 3rd hydraulic pressure steel cylinders, 31 is the 4th hydraulic pressure steel cylinders, 32 is exhaust metering pumps, 33 is the 11 pneumatic ball valves, 34 is the 12 pneumatic ball valves.
Solid line pipeline in Fig. 1 represents test system working line, represented by dotted arrows test system exhaust pipeline.
Embodiment
The Performance Test System of hydraulic control unit in the brake system of car that the present invention proposes, its structure as shown in Figure 1, comprises pressure lifting device, hydraulic plumbing system, control and measure device and environment simulator.
Pressure lifting device wherein, comprise fuel tank 1, variable displacement pump 2, servo proportion 4, accumulator 3, first pneumatic ball valve 5 and the second pneumatic ball valve 6, the entrance of servo proportion 4 is connected with fuel tank 1 with variable displacement pump 2 successively by working line, and the outlet of servo proportion 4 is connected with the second pneumatic ball valve 6 with the first pneumatic ball valve 5 respectively by working line.
Hydraulic plumbing system wherein comprises the first simulation master cylinder 7, second simulation master cylinder 8, first displacement transducer 9, second displacement sensor 10, first oil can 11, second oil can 12, 3rd pneumatic ball valve 13, 4th pneumatic ball valve 14, 5th pneumatic ball valve 15, 6th pneumatic ball valve 16, first pressure transducer 17, second pressure transducer 18, hydraulic control unit (HCU) 19, 3rd pressure transducer 20, 4th pressure transducer 21, 5th pressure transducer 22, 6th pressure transducer 23, 7th pneumatic ball valve 24, 8th pneumatic ball valve 25, 9th pneumatic ball valve 26, tenth pneumatic ball valve 27, first hydraulic pressure steel cylinder 28, second hydraulic pressure steel cylinder 29, 3rd hydraulic pressure steel cylinder 30 and the 4th hydraulic pressure steel cylinder 31.The back cavity oil inlet of the first simulation master cylinder 7 is connected with the first pneumatic ball valve by working line, and the back cavity oil inlet of the second simulation master cylinder 8 is connected with the second pneumatic ball valve by working line; The first described simulation piston of master cylinder 7 and the measuring end of the first displacement transducer 9 are connected, and the second simulation piston of master cylinder 8 and the measuring end of second displacement sensor 10 are connected.First oil can 11 is connected with the first front cavity oil inlet simulating master cylinder 7 with the 3rd pneumatic ball valve 13 successively by working line, and the second oil can 12 is simulated master cylinder 8 front cavity oil inlet with the 4th pneumatic ball valve 14 and second successively by working line and is connected.The ante-chamber oil outlet of the first simulation master cylinder 7 is connected with the first filler opening of hydraulic control unit (HCU) 19 with the 5th pneumatic ball valve 15, first pressure transducer 17 successively by working line, and the ante-chamber oil outlet of the second simulation master cylinder 8 is connected with the second filler opening of hydraulic control unit (HCU) 19 with the 6th pneumatic ball valve 16, second pressure transducer 18 successively by working line.First oil outlet of hydraulic control unit (HCU) 19 by working line successively with the 3rd pressure transducer 20, 7th pneumatic ball valve 24 is connected with the first hydraulic pressure steel cylinder 28, second oil outlet of hydraulic control unit (HCU) 19 by working line successively with the 4th pressure transducer 21, 8th pneumatic ball valve 25 is connected with the second hydraulic pressure steel cylinder 29, 3rd oil outlet of hydraulic control unit (HCU) 19 by working line successively with the 5th pressure transducer 22, 9th pneumatic ball valve 26 is connected with the 3rd hydraulic pressure steel cylinder 30, 4th oil outlet of hydraulic control unit (HCU) 19 by working line successively with the 6th pressure transducer 23, tenth pneumatic ball valve 27 is connected with the 4th hydraulic pressure steel cylinder 31.The back cavity oil outlet of the first simulation master cylinder 7 is connected with the 12 pneumatic ball valve 34 by gas exhaust piping jointly with the back cavity oil outlet of the second simulation master cylinder 8, and the 12 pneumatic ball valve 34 is connected with fuel tank 1 by gas exhaust piping.First hydraulic pressure steel cylinder 28, second hydraulic pressure steel cylinder 29, the 3rd hydraulic pressure steel cylinder 30 and the 4th hydraulic pressure steel cylinder 31 are connected with the filler opening of exhaust metering pump 32 jointly by gas exhaust piping, the oil outlet of exhaust metering pump 32 is connected with the 11 pneumatic ball valve 33 by gas exhaust piping, and the 11 pneumatic ball valve 33 simulates the front cavity oil inlet of master cylinder 7 respectively with first by gas exhaust piping and the second front cavity oil inlet simulating master cylinder 8 is connected.
Control and measure device is wherein a process control machine controlled the test process of hydraulic control unit, the output port of process control machine by signaling line respectively with variable displacement pump 2, servo proportion 4, first pneumatic ball valve 5, second pneumatic ball valve 6, 3rd pneumatic ball valve 13, 4th pneumatic ball valve 14, 5th pneumatic ball valve 15, 6th pneumatic ball valve 16, hydraulic control unit (HCU) 19, 7th pneumatic ball valve 24, 8th pneumatic ball valve 25, 9th pneumatic ball valve 26, tenth pneumatic ball valve 27, exhaust metering pump 32, 11 pneumatic ball valve 33 is connected with the 12 pneumatic ball valve 34, the input port of process control machine by signaling line respectively with the first displacement transducer 9, second displacement sensor 10, first pressure transducer 17, second pressure transducer 18, 3rd pressure transducer 20, 4th pressure transducer 21, 5th pressure transducer 22, 6th pressure transducer 23 is connected with vibration transducer (not shown), and this vibration transducer machinery is connected with the housing of hydraulic control unit (HCU) 19.
Environment simulator is wherein that a high-low temperature test chamber is not shown, arranged by the proportional space of working line, hydraulic control unit (HCU) 19 and the working line be connected with hydraulic control unit (HCU) are placed in high-low temperature test chamber.
Below in conjunction with accompanying drawing, introduce working principle and the working procedure of test system of the present invention in detail:
Fuel tank 1 in test system of the present invention is for storing brake fluid, and variable displacement pump 2 extracts brake fluid from fuel tank 1, and pump discharge delivered to by suction booster.Voltage stabilizing accumulator 3, for stable variable displacement pump 2 outlet pressure, eliminates pressure surge.Servo proportion 4 is for fine adjustment variable displacement pump 2 outlet oil pressure, and servo proportion 4 is controlled by electrical signal by control and measure device, can be arranged the delivery pressure of pressure lifting device by the process control machine in control and measure device.First pneumatic ball valve 5, second pneumatic ball valve 6 is respectively used to pilot pressure lifting device and first and simulates the break-make that master cylinder 7, second simulates pipeline between master cylinder 8, and the first pneumatic ball valve 5, second pneumatic ball valve 6 is also controlled by the process control machine in control and measure device.
The first simulation master cylinder 7 in test system of the present invention and the second simulation master cylinder 8 actual be a hydraulic jack can measuring piston displacement, oil cylinder is divided into two chambers by piston, the chamber be connected with pressure lifting device is called master cylinder back cavity, and in addition another chamber is called master cylinder ante-chamber.Simulation master cylinder piston is connected mutually with a displacement transducer, can the displacement of measure analog master cylinder piston by displacement transducer.First simulation master cylinder 7, second is simulated master cylinder 8 back cavity and is connect pressure lifting device oil outlet, brake fluid can be pumped into described first simulation master cylinder 7 back cavity, the second simulation master cylinder 8 back cavity by pressure lifting device, thus the brake fluid pressure needed for producing, and be passed to ante-chamber by the first simulation master cylinder 7, second simulation master cylinder 8 piston.Described first simulation master cylinder 7, second is simulated master cylinder 8 piston and is mechanically connected with the first displacement transducer 9, second displacement sensor 10 measuring end respectively, can measure master cylinder piston displacement in real time.First simulation master cylinder 7, second simulates the first filler opening and the second filler opening that master cylinder 8 ante-chamber connects hydraulic control unit (HCU) 19 respectively, the pipeline that first simulation master cylinder 7, second simulates master cylinder 8 to hydraulic control unit (HCU) 19 has large rigidity, so the brake fluid flow that the first simulation master cylinder 7, second simulates master cylinder 8 piston displacement generation can represent braking system rear end consumption liquid measure.First oil can 11, second oil can 12 is connected to the first simulation master cylinder 7, second respectively by working line and simulates master cylinder 8 ante-chamber, the vertical height of the first oil can 11, second oil can 12 position simulates master cylinder 8 higher than the first simulation master cylinder 7, second, brake fluid in first oil can 11, second oil can 12 can flow into the first simulation master cylinder 7, second respectively and simulate master cylinder 8, and forms open liquid level at the first oil can 11, second oil can 12 opening.First oil can 11, second oil can 12 and first is simulated master cylinder 7, second and is simulated between master cylinder 8 ante-chamber the 3rd pneumatic ball valve 13, the 4th pneumatic ball valve 14 are housed, and process control machine can control the first oil can 11, second oil can 12 and whether simulate master cylinder 7, second with first and simulate master cylinder 8 ante-chamber and be communicated with.
Simulation master cylinder oil can assembly in test system of the present invention has two covers, is connected respectively with the first filler opening of hydraulic control unit (HCU) 19 and the second filler opening, respectively two pressure chambers of simulated automotive brake master cylinder.
The first hydraulic pressure steel cylinder 28, second hydraulic pressure steel cylinder 29 in test system of the present invention, the 3rd hydraulic pressure steel cylinder 30, the 4th hydraulic pressure steel cylinder 31 are connected to hydraulic control unit (HCU) 19 first oil outlet, the second oil outlet, the 3rd oil outlet, the 4th oil outlet respectively by working line, for replacing real vehicle takes turns break and the hydraulic volume rigidity of analog wheel break, by regulating the actual volume of described first hydraulic pressure steel cylinder 28, second hydraulic pressure steel cylinder 29, the 3rd hydraulic pressure steel cylinder 30, the 4th hydraulic pressure steel cylinder 31 thus regulating its volume rigidity.First hydraulic pressure steel cylinder 28, second hydraulic pressure steel cylinder 29, the 3rd hydraulic pressure steel cylinder 30, the 7th pneumatic ball valve 24, the 8th pneumatic ball valve 25, the 9th pneumatic ball valve 26, the tenth pneumatic ball valve 27 are housed between the 4th hydraulic pressure steel cylinder 31 and hydraulic control unit (HCU) 19, direct closedown the 7th pneumatic ball valve 24, the 8th pneumatic ball valve 25, the 9th pneumatic ball valve 26 and the tenth pneumatic ball valve 27 can make the volume rigidity of hydraulic control unit (HCU) 16 oil outlet increase substantially, accurately to measure accumulator volume in hydraulic control unit (HCU) 16.
Control survey part in test system of the present invention comprises process control machine and sensor.Process control machine has input output board, can sensor-lodging carry out data logging and analysis; Also control command can be sent, control the discharge capacity of variable displacement pump 2 in test system, the delivery pressure of servo proportion 4, the action of the first pneumatic ball valve 5, second pneumatic ball valve 6, the 3rd pneumatic ball valve 13, the 4th pneumatic ball valve 14, the 5th pneumatic ball valve 15, the 6th pneumatic ball valve 16, the 7th pneumatic ball valve 24, the 8th pneumatic ball valve 25, the 9th pneumatic ball valve 26, the tenth pneumatic ball valve the 27, the 11 pneumatic ball valve the 33, the 12 pneumatic ball valve 34, and the inner each solenoid valve of hydraulic control unit (HCU) 19, motor working state.Process control machine in test system of the present invention, the PXI data acquistion system that real time operating system is housed can produced by National Instruments is formed.The built-in test procedure of process control machine, testing property project adjustment pressure source delivery pressure that can be different according to hydraulic control unit (HCU) 19, and each pneumatic ball valve state, thus change testing hydraulic loop configuration.And in process of the test, gather the signal of displacement transducer, pressure transducer, current sensor and vibration transducer, carry out recording and analysing and processing, thus reflect the corresponding performance index of hydraulic control unit (HCU) 19.Sensor comprises the first displacement sensor 9, second displacement sensor 10, first pressure transducer 17, second pressure transducer 18, the 3rd pressure transducer 20, the 4th pressure transducer 21, the 5th pressure transducer 22, the 6th pressure transducer 23, current sensor and vibration transducer.First displacement sensor 9, second displacement sensor 10 are mechanically connected to the first simulation master cylinder 7, second respectively and simulate on the piston of master cylinder 8, simulate the piston displacement of master cylinder 8 for measuring the first simulation master cylinder 7, second.First pressure transducer 17, second pressure transducer 18 is connected to the first filler opening second filler opening of hydraulic control unit (HCU) 19, measure filler opening brake fluid pressure, represent the delivery pressure that the first simulation master cylinder 7, second simulates master cylinder 8 respectively.3rd pressure transducer 20, the 4th pressure transducer 21, the 5th pressure transducer 22, the 6th pressure transducer 23 are connected to the first oil outlet, the second oil outlet, the 3rd oil outlet, the 4th oil outlet of hydraulic control unit (HCU) 19, measure hydraulic fluid port brake fluid pressure, represent corresponding wheel brake pressure, namely represent the internal pressure of the first hydraulic pressure steel cylinder 28, second hydraulic pressure steel cylinder 29, the 3rd hydraulic pressure steel cylinder 30, the 4th hydraulic pressure steel cylinder 31 respectively.Current sensor is placed in hydraulic control unit (HCU) 19 control circuit, for measuring the size of current that each solenoid valve of hydraulic control unit (HCU) 19 flows through.Vibration transducer is adsorbed on hydraulic control unit (HCU) 19 housing, for measuring the vibration that in hydraulic control unit (HCU) 19, valve core of the electromagnetic valve is taken a seat, thus judges the solenoid closure moment.
Environment simulator is a high-low temperature test chamber, and test the temperature inside the box can accept process control machine and control, and regulates arbitrarily between 70 DEG C at-40 DEG C.Described hydraulic plumbing system is placed in high-low temperature test chamber, can testing hydraulic control unit (HCU) performance parameter at varying environment temperature and brake fluid temperature by changing high-low temperature test chamber temperature.
Test system of the present invention, the first oil outlet, the second oil outlet, the 3rd oil outlet, the 4th oil outlet of hydraulic control unit (HCU) 19 is closed respectively by the first hydraulic pressure steel cylinder 28, second hydraulic pressure steel cylinder 29, the 3rd hydraulic pressure steel cylinder 30, the 4th hydraulic pressure steel cylinder 31, volume rigidity oil outlet being had meet the demands, generally gets propons 0.160cm
3/ Mpa, back axle 0.065cm
3/ MPa; Brake fluid is filled in fuel tank 1, open the first pneumatic ball valve 5, second pneumatic ball valve the 6, the 12 pneumatic ball valve 34, open variable displacement pump 2, brake fluid is pumped to the first simulation master cylinder 7, second from fuel tank 1 and simulates master cylinder 8 back cavity, then be back to fuel tank 1 by the 12 pneumatic ball valve 34.Circulated by the brake fluid of a period of time and take away the first simulation master cylinder 7, second and simulate the bubble existed in the working line that master cylinder 8 back cavity and being attached thereto connects, then the 12 pneumatic ball valve 34 is closed, then close variable displacement pump 2 again, thus realize the exhaust of pressure lifting device.
To the first oil can 11, to annotate in second oil can 12 brake fluid, brake fluid is made to be full of oil can, open the 3rd pneumatic ball valve 13, 4th pneumatic ball valve 14, 5th pneumatic ball valve 15, 6th pneumatic ball valve 16, 7th pneumatic ball valve 24, 8th pneumatic ball valve 25, 9th pneumatic ball valve 26, tenth pneumatic ball valve 27, 11 pneumatic ball valve 33, and open exhaust metering pump 32, make brake fluid through the first simulation master cylinder 7, second simulation master cylinder 8 ante-chamber, hydraulic control unit (HCU) 19, metering pump 32 circulates, circulated by the brake fluid of a period of time and take away the first simulation master cylinder 7, second simulation master cylinder 8 ante-chamber, hydraulic control unit (HCU) 19 and the bubble be attached thereto in working line, then the 11 pneumatic ball valve 33 is closed, then close metering pump 32 again, thus air in eliminating hydraulic plumbing system, aforementioned (1) Plays is reached to make pipe volume rigidity.
3rd pneumatic ball valve 13, 4th pneumatic ball valve 14, 11 pneumatic ball valve 33, 12 pneumatic ball valve 34 keeps closing, first pneumatic ball valve 5, second pneumatic ball valve 6, 5th pneumatic ball valve 15, 6th pneumatic ball valve 16, 7th pneumatic ball valve 24, 8th pneumatic ball valve 25, 9th pneumatic ball valve 26, tenth pneumatic ball valve 27 is held open, reduction valve in hydraulic control unit (HCU) 19 is opened, and improve hydraulic control unit (HCU) 19 inlet pressure by pilot pressure lifting device, thus make brake fluid be full of accumulator in hydraulic control unit (HCU) 19.Now close reduction valve in hydraulic control unit (HCU) 19, open dump pump in hydraulic control unit (HCU) 19, the brake fluid be full of by liquid in the accumulator in hydraulic control unit (HCU) 19 is pumped by hydraulic control unit (HCU) 19 filler opening.Master cylinder 8 ante-chamber is simulated because brake fluid is all pumped to the first simulation master cylinder 7, second, move after promoting piston, now respectively by the first displacement transducer 9, the time inner carrier displacement of second displacement sensor 10 unit of measurement, thus calculate the volume that hydraulic control unit in the unit time (HCU) 19 pumps brake fluid, hydraulic control unit (HCU) 19 pump duty can be represented.Promote the first simulation master cylinder 7, second by pressure lifting device and simulate the rear cavity pressure of master cylinder 8, pressure can be passed to the first simulation master cylinder 7, second by piston and simulate master cylinder 8 ante-chamber, and be passed to hydraulic control unit (HCU) 19 filler opening by working line, now carry out test and can measure pump duty under different back pressure, change ambient temperature and can measure pump duty under different temperatures.
Pipeline is kept to be vented completely, tenth pneumatic ball valve the 33, the 11 pneumatic ball valve 34 keeps closing, first pneumatic ball valve 5, second pneumatic ball valve 5, the 3rd pneumatic ball valve 13, the 4th pneumatic ball valve 14, the 5th pneumatic ball valve 15, the 6th pneumatic ball valve 16, the 7th pneumatic ball valve 24, the 8th pneumatic ball valve 25, the 9th pneumatic ball valve 26, the tenth pneumatic ball valve 27 are held open, and now the first oil can 11, second oil can 12 is connected with hydraulic control unit (HCU) 19 filler opening and forms open liquid level.Open suction valve and the dump pump of hydraulic control unit (HCU) 19.Now hydraulic control unit (HCU) 19 has the initiative pressurized state, first simulation master cylinder 7, second brake fluid of simulating in master cylinder 8 ante-chamber is hydraulically controlled unit (HCU) 19 and extracts to the first hydraulic pressure steel cylinder 28, second hydraulic pressure steel cylinder 29, the 3rd hydraulic pressure steel cylinder 30, the 4th hydraulic pressure steel cylinder 31, makes the first hydraulic pressure steel cylinder 28, second hydraulic pressure steel cylinder 29, the 3rd hydraulic pressure steel cylinder 30, the 4th hydraulic pressure steel cylinder 31 oil pressure rising.Measure the first hydraulic pressure steel cylinder 28, second hydraulic pressure steel cylinder 29, the 3rd hydraulic pressure steel cylinder 30, the 4th hydraulic pressure steel cylinder 31 pressure-time curve respectively by the 3rd pressure transducer 20, the 4th pressure transducer 21, the 5th pressure transducer 22, the 6th pressure transducer 23, the active boost ability of hydraulic control unit (HCU) 19 pump can be obtained.Change the active boost ability that ambient temperature can measure hydraulic control unit (HCU) 19 pump under different temperatures.
Opened by the pressure-limit valve of hydraulic control unit (HCU) 19, suction valve, pressure charging valve, reduction valve are closed.Control by process control machine the delivery pressure improving pressure lifting device, thus the front cavity pressure making the first simulation master cylinder 7, second simulate master cylinder 8 improves, control to maintain pressure by servo proportion 4 constant within a period of time.Hydraulic control unit (HCU) 19 first oil outlet, the second oil outlet, the 3rd oil outlet, the 4th oil outlet pressure is monitored respectively by the 3rd pressure transducer 20, the 4th pressure transducer 21, the 5th pressure transducer 22, the 6th pressure transducer 23.If four oil outlet a period of time internal pressures rise and are all less than a certain amount of, be less than 0.5Mpa as 30s internal pressure rises, then can think the favorable sealing property of pressure charging valve.
Hydraulic control unit (HCU) 19 pressure-limit valve, pressure charging valve are opened, suction valve, reduction valve are closed.Control by process control machine the delivery pressure improving pressure lifting device, thus make hydraulic control unit (HCU) 19 oil outlet pressure be elevated to certain value.Then hydraulic control unit (HCU) 19 pressure-limit valve, suction valve, reduction valve are closed, pressure charging valve is opened, and hydraulic control unit (HCU) 19 enters pressure-limit valve packing state.Open the 12 pneumatic ball valve 34 immediately, remove the delivery pressure of pressure lifting device, now monitored the first oil outlet, the second oil outlet, the 3rd oil outlet, the 4th oil outlet brake fluid pressure fall of hydraulic control unit (HCU) 19 by the 3rd pressure transducer 20, the 4th pressure transducer 21, the 5th pressure transducer 22, the 6th pressure transducer 23 respectively.If described four oil outlet pressure drop amplitudes are all less than certain value, as 30s internal pressure decline be less than 0.5Mpa, then can think pressure-limit valve and reduction valve sealing good.
After confirmation pressure-limit valve has good sealing property, hydraulic control unit (HCU) 19 pressure charging valve, reduction valve are opened, pressure-limit valve, suction valve closure.Cross the delivery pressure that process control machine controls to improve pressure lifting device, high-pressure brake liquid flows to the first oil outlet, the second oil outlet, the 3rd oil outlet, the 4th oil outlet of hydraulic control unit (HCU) 19 respectively by pressure-limit valve bypass one-way valve, makes four oil outlet pressure increase.Open the 12 pneumatic ball valve 34 immediately, remove the delivery pressure of pressure lifting device, now monitored the first oil outlet, the second oil outlet, the 3rd oil outlet, the 4th oil outlet a period of time internal pressure fall of hydraulic control unit (HCU) 19 by the 3rd pressure transducer 20, the 4th pressure transducer 21, the 5th pressure transducer 22, the 6th pressure transducer 23 respectively.If described four oil outlet pressure drop amplitudes are all less than certain value, as 30s internal pressure decline be less than 0.5Mpa, then can think pressure-limit valve and reduction valve sealing good.
Opened by hydraulic control unit (HCU) 19 pressure-limit valve, pressure charging valve, suction valve, reduction valve are closed.Control by process control machine the delivery pressure improving pressure lifting device, thus before making the first simulation master cylinder 7, second simulate master cylinder 8, cavity pressure improves, control to maintain pressure by servo proportion 4 constant within a period of time.Open pressure charging valve immediately.Send moment and corresponding hydraulic control unit (HCU) 19 oil outlet pressure signal using pressure charging valve cut-in voltage signal to start to increase the moment as the mark moment, the time difference in two marker moment is that the response time opened by pressure charging valve.
Hydraulic control unit (HCU) 19 pressure charging valve is in opening state.Close pressure charging valve.Close after voltage signal sends moment and valve land using pressure charging valve and produce the moment of vibration signal as the mark moment, the time difference in two marker moment is that pressure charging valve cuts out the response time.
Hydraulic control unit (HCU) 19 pressure-limit valve, pressure charging valve are opened, suction valve, reduction valve are closed.Control by process control machine the delivery pressure improving pressure lifting device, thus before making the first simulation master cylinder 7, second simulate master cylinder 8, cavity pressure improves.Close pressure-limit valve immediately, carry out pressure-limit valve pressurize.Open the 12 pneumatic ball valve 34, remove the delivery pressure of pressure lifting device.Then reduction valve is opened.Send moment and corresponding hydraulic control unit (HCU) 19 oil outlet pressure using reduction valve cut-in voltage signal to start to reduce the moment as the mark moment, the time difference in two marker moment is that the response time opened by reduction valve.
Hydraulic control unit (HCU) 19 reduction valve is in opening state.Close reduction valve.Close after voltage signal sends moment and valve land using reduction valve and produce the moment of vibration signal as the mark moment, the time difference in two marker moment is that reduction valve cuts out the response time.
7th pneumatic ball valve 24, the 8th pneumatic ball valve 25, the 9th pneumatic ball valve 26, the tenth pneumatic ball valve 27, block the oil outlet of hydraulic control unit (HCU) 19, improves oil outlet volume rigidity as far as possible.Hydraulic control unit (HCU) 19 pressure-limit valve, pressure charging valve, reduction valve are opened, suction valve closure.Control by process control machine the delivery pressure improving pressure lifting device, thus before making the first simulation master cylinder 7, second simulate master cylinder 8, cavity pressure improves, and makes brake fluid be full of hydraulic control unit (HCU) 19 accumulator.Close pressure-controlled unit (HCU) 19 pressure-limit valve, pressure charging valve, reduction valve, suction valve, now brake fluid is sealed up for safekeeping in accumulator.Open the 12 pneumatic ball valve 34 immediately, remove the delivery pressure of pressure lifting device, then hydraulic control unit (HCU) 19 pressure-limit valve is opened and starting electrical machinery, brake fluid in accumulator is all pumped through hydraulic control unit (HCU) 19 filler opening, enter the first simulation master cylinder 7, second respectively and simulate master cylinder 8, promote the first simulation master cylinder 7, second simulation master cylinder 8 piston and be moved to the left.The displacement of piston movement can be recorded by the first displacement transducer 9, second displacement sensor 10, thus calculate the volume pumping brake fluid, hydraulic control unit (HCU) 19 accumulator volume can be thought.
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| CN105938053B (en) * | 2016-07-08 | 2018-11-06 | 宁波赛福汽车制动有限公司 | Motorcycle ABS performance test experiment table |
| CN105938054B (en) * | 2016-07-08 | 2018-11-06 | 宁波赛福汽车制动有限公司 | Motorcycle ABS durability test experimental bench |
| CN107202683A (en) * | 2017-05-31 | 2017-09-26 | 天津英创汇智汽车技术有限公司 | Hydraulic control unit low-pressure performance detection method, device and system in automobile ESC |
| CN107165891B (en) * | 2017-05-31 | 2018-09-18 | 天津英创汇智汽车技术有限公司 | Hydraulic control unit high-voltage performance detection method, apparatus and system in automobile ESC |
| CN107356440A (en) * | 2017-09-04 | 2017-11-17 | 杭州沃镭智能科技股份有限公司 | ESC HCU assembly air pressure device for detecting performance |
| CN111089096A (en) * | 2019-12-18 | 2020-05-01 | 上海擎度汽车科技有限公司 | ESC hydraulic performance test method based on flow control |
| CN111879527B (en) * | 2020-08-04 | 2022-04-29 | 清华大学 | System and method for testing durability of hydraulic control unit in automobile braking system |
| CN112595523A (en) * | 2020-11-23 | 2021-04-02 | 一汽解放汽车有限公司 | PVT test system |
| CN115585174B (en) * | 2022-05-07 | 2025-06-10 | 北京英创汇智科技有限公司 | Performance test board for hydraulic unit of automobile electric control braking system |
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