CN113933069B - Method and system for testing liquid amount required by brake caliper - Google Patents
Method and system for testing liquid amount required by brake caliper Download PDFInfo
- Publication number
- CN113933069B CN113933069B CN202111383700.XA CN202111383700A CN113933069B CN 113933069 B CN113933069 B CN 113933069B CN 202111383700 A CN202111383700 A CN 202111383700A CN 113933069 B CN113933069 B CN 113933069B
- Authority
- CN
- China
- Prior art keywords
- brake caliper
- liquid
- measuring
- data
- normal temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 283
- 238000012360 testing method Methods 0.000 title claims abstract description 208
- 238000000034 method Methods 0.000 title claims abstract description 58
- 238000010998 test method Methods 0.000 claims abstract 5
- 239000012530 fluid Substances 0.000 claims description 48
- 230000003068 static effect Effects 0.000 claims description 21
- 238000011056 performance test Methods 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 4
- 238000011156 evaluation Methods 0.000 claims description 3
- 238000005562 fading Methods 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000010835 comparative analysis Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 208000035824 paresthesia Diseases 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Braking Arrangements (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Regulating Braking Force (AREA)
Abstract
The embodiment of the invention discloses a method and a system for testing the liquid amount required by a brake caliper. The test method comprises the steps of obtaining test parameters of the vehicle under a preset working condition; according to the test parameters, measuring first liquid demand data of the brake caliper at normal temperature; measuring second liquid demand data of the brake caliper in a high-temperature state according to the test parameters; measuring third liquid requirement data of the brake caliper when the brake caliper decays to a normal temperature state through high temperature; and evaluating the actual liquid demand of the brake caliper on the vehicle according to the first liquid demand data, the second liquid demand data and the third liquid demand data. According to the technical scheme provided by the embodiment of the invention, the liquid demand of the brake caliper is tested by simulating different working conditions of the vehicle in a high-temperature state, so that a certain data support is provided for calibrating the electronic vehicle body stabilizing system and pedal feeling of the whole vehicle, and the liquid demand of the whole vehicle is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of brake caliper testing, in particular to a method and a system for testing the liquid amount required by a brake caliper.
Background
For a passenger car with large weight and large moment of inertia, the temperature of the brake disc is easy to rise. And under the high temperature state, the parts inside the brake caliper have different performances from those under the normal temperature state, and the key performance parameter of the liquid demand of the vehicle is also different.
However, the existing method for testing the liquid amount required by the brake caliper can only test the brake caliper at normal temperature, and cannot meet the test requirement of the liquid amount required by the brake caliper at high temperature.
The problem that the existing method for testing the liquid amount required by the brake caliper can not meet the test requirement of the liquid amount required by the brake caliper in a high-temperature state becomes a problem to be solved in the industry.
Disclosure of Invention
The embodiment of the invention provides a method and a system for testing the liquid amount required by a brake caliper, which are used for solving the problem that the liquid amount required by the brake caliper cannot be tested in a high-temperature braking state in the prior art.
In order to realize the technical problems, the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a method for testing a required fluid amount of a brake caliper, including:
acquiring test parameters of the vehicle under a preset working condition;
according to the test parameters, measuring first liquid demand data of the brake caliper at normal temperature;
measuring second liquid demand data of the brake caliper in a high-temperature state according to the test parameters;
measuring third liquid requirement data of the brake caliper when the brake caliper decays to a normal temperature state through high temperature;
and evaluating the actual liquid demand of the brake caliper on the vehicle according to the first liquid demand data, the second liquid demand data and the third liquid demand data.
Optionally, the measuring the first liquid requirement data of the brake caliper in the normal temperature state according to the test parameter includes:
measuring liquid demand data of the brake caliper under a braking working condition according to the test parameters in a normal temperature state;
and under the normal temperature state, measuring the liquid demand data of the brake caliper under the static working condition according to the test parameters.
Optionally, the measuring the second liquid requirement data of the brake caliper in the high temperature state according to the test parameters includes:
according to the test parameters, measuring liquid demand data of the brake caliper at a first preset temperature;
according to the test parameters, measuring liquid demand data of the brake caliper at a second preset temperature;
and measuring liquid demand data of the brake caliper at a third preset temperature according to the test parameters.
Optionally, the measuring the third liquid requirement data of the brake caliper when the brake caliper is degraded to a normal temperature state through high temperature includes:
when the brake caliper is in a high-temperature decline to normal temperature state, measuring liquid demand data of the brake caliper under a braking working condition;
and measuring liquid demand data of the brake caliper under a static working condition when the brake caliper is degenerated to a normal temperature state at a high temperature.
Optionally, after the measuring the third liquid requirement data of the brake caliper when the temperature is reduced to the normal temperature state, the method further includes:
pressurizing and releasing the pressure of the brake caliper, and repeating the operation for preset times;
and measuring the liquid demand data of the pressurized brake caliper, which is subjected to high temperature.
Optionally, the measuring the pressurized fluid demand data of the brake caliper, which is subjected to a high temperature, includes:
measuring the liquid demand of the pre-pressed brake caliper after the brake caliper is subjected to a first preset temperature decay;
measuring the liquid demand of the pre-pressed brake caliper after the brake caliper is subjected to the second preset temperature decay;
and measuring the liquid demand of the pre-pressed brake caliper after the brake caliper is subjected to the third preset temperature decay.
Optionally, after the measuring the pressurized brake caliper and the high-temperature liquid demand data, the method further includes:
and measuring liquid demand data of the brake caliper in a normal temperature state after pre-pressing and high-temperature decay.
Optionally, the measuring the liquid requirement data of the brake caliper in the normal temperature state after the pre-pressing and the high temperature decay includes:
in a normal temperature state, the liquid demand data of the brake caliper after prepressing and high temperature decay in the braking process;
and in a normal temperature state, the liquid demand data of the brake caliper under a static working condition after pre-pressing and high-temperature decay.
Optionally, before the measuring the second liquid requirement data of the brake caliper in the high temperature state according to the test parameters, the method further includes:
running in the brake caliper;
under the braking working condition in a normal temperature simulated state on an inertia test bench, measuring the liquid requirement data of the brake caliper after running-in;
and under the static working condition of simulating the normal temperature on an inertia test table, measuring the liquid requirement data of the brake caliper after running-in.
In a second aspect, the embodiment of the invention also provides a system for testing the liquid amount required by the brake caliper, which comprises a parameter acquisition module, a control module and a control module, wherein the parameter acquisition module is used for acquiring test parameters of a vehicle under a preset working condition;
the basic performance test stand of the brake caliper is used for measuring first liquid requirement data of the brake caliper in a normal temperature state according to the test parameters;
the inertia test stand is used for measuring second liquid requirement data of the brake caliper in a high-temperature state according to the test parameters;
the inertia test stand is also used for measuring third liquid requirement data of the brake caliper when the brake caliper is in a high-temperature fading state to a normal temperature state;
and the evaluation module is used for evaluating the actual liquid requirement of the brake caliper on the vehicle according to the first liquid requirement data, the second liquid requirement data and the third liquid requirement data.
According to the method for testing the liquid amount required by the brake caliper, the situation that an actual vehicle brakes in different running states is tested in advance, corresponding test parameters are collected, a database is formed by inputting a basic performance test stand and an inertia test stand of the brake caliper, then the measurement parameters required by measuring the liquid amount required by the brake caliper in different states in the running process of the simulated vehicle are respectively obtained, and multi-step comparison tests are carried out to obtain corresponding first liquid amount required data, second liquid amount required data and third liquid amount required data. Through carrying out comparative analysis on the magnitude of each data value, the actual liquid requirement of the brake caliper in the high temperature and the liquid requirement in the normal temperature state are counted, so that data support is provided for calibrating the electronic stability system and pedal feeling of the whole vehicle, the brake caliper can be tested in the normal temperature state and the high temperature state, the test requirement of the liquid requirement of the brake caliper in different working conditions is met, and the basis is provided for effectively rectifying and modifying the whole vehicle according to the difference between the liquid requirement of the brake caliper in the high temperature state and the normal temperature state, so as to improve the vehicle performance.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the description of the embodiments of the present invention, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the contents of the embodiments of the present invention and these drawings without inventive effort for those skilled in the art.
FIG. 1 is a flow chart of a method for testing the amount of fluid required by a brake caliper according to an embodiment of the present invention;
FIG. 2 is a flow chart of yet another method for testing the amount of fluid required for a brake caliper according to an embodiment of the present invention;
FIG. 3 is a flow chart of yet another method for testing the amount of fluid required for a brake caliper according to an embodiment of the present invention;
FIG. 4 is a flow chart of yet another method for testing the amount of fluid required for a brake caliper according to an embodiment of the present invention;
FIG. 5 is a flow chart of yet another method for testing the amount of fluid required for a brake caliper according to an embodiment of the present invention;
FIG. 6 is a flow chart of yet another method for testing the amount of fluid required for a brake caliper according to an embodiment of the present invention;
FIG. 7 is a flow chart of yet another method for testing the amount of fluid required for a brake caliper according to an embodiment of the present invention;
FIG. 8 is a flow chart of yet another method for testing the amount of fluid required for a brake caliper according to an embodiment of the present invention;
FIG. 9 is a flow chart of yet another method for testing the amount of fluid required for a brake caliper provided by an embodiment of the present invention;
FIG. 10 is a block diagram of a system for testing the amount of fluid required for a brake caliper according to an embodiment of the present invention;
FIG. 11 is a block diagram of yet another brake caliper required fluid amount testing system provided in accordance with an embodiment of the present invention;
fig. 12 is a block diagram of a further brake caliper required fluid amount testing system according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Based on the above technical problems, the present embodiment proposes the following solutions:
the embodiment of the invention provides a method for testing the liquid amount required by a brake caliper. Fig. 1 is a flow chart of a method for testing the amount of fluid required by a brake caliper according to an embodiment of the present invention. As shown in fig. 1, the method for testing the liquid amount required by the brake caliper according to the embodiment of the invention includes:
s101, acquiring test parameters of the vehicle under preset working conditions.
Specifically, the preset operating conditions may include actual operating conditions on the inertia test stand that simulate braking and/or standstill of the vehicle. The test parameters include, but are not limited to, the pressure value of the preload, the number of preloads, the boost rate of the test pressure, the hydraulic pressure value when the liquid demand is tested, the brake disc rotational speed, and/or the hydraulic pressure when the brake disc is warmed up for towing. The method comprises the steps of adjusting various parameters when a vehicle starts to brake at different initial running speeds and different decelerations in advance, collecting optimal solutions of various test parameters for testing the liquid needed by a brake caliper under different running states of the vehicle, summarizing and inputting the optimal solutions into a basic performance test stand and an inertia test stand of the brake caliper to form a database, and obtaining corresponding optimal test parameters according to different rotating speeds of the brake caliper in a test of the liquid needed by the brake caliper under a high temperature state.
S102, measuring first liquid requirement data of the brake caliper in a normal temperature state according to the test parameters.
Specifically, in general, the test for the liquid demand of the brake caliper is generally performed when the vehicle is stationary at normal temperature. The first liquid requirement data comprise liquid requirement data for measuring the working of the brake caliper when the vehicle is simulated on an inertia test stand under the preset working condition in the normal temperature state. According to the obtained normal temperature state, each test parameter used by the vehicle for testing the liquid required amount of the brake caliper under the preset working condition is measured on the inertia test bench, and the first liquid required amount data is obtained so as to obtain the liquid required amount level of the brake caliper when the new vehicle leaves the factory.
And S103, measuring second liquid requirement data of the brake caliper in a high-temperature state according to the test parameters.
Specifically, the second liquid demand data includes a liquid consumption value measured when the brake caliper is simulated in a high temperature state on the inertia test stand. The friction plate of the brake caliper can be tightly rubbed with the brake disc in the actual braking working condition process of the vehicle, friction force is generated, the speed of the vehicle is reduced through huge friction force, and a large amount of heat is generated in the severe friction process, so that the temperature of the brake caliper is increased. Therefore, the brake caliper is operated at a high temperature under the actual braking condition of the vehicle. The state of the brake caliper during braking of the vehicle can thus be simulated by continuously heating the brake disc drag on the inertia test stand. The temperature of the brake disc can be obtained in real time through a temperature sensor arranged in the brake disc, and the liquid consumption of the brake caliper at different temperatures is measured to obtain second liquid demand data.
And S104, measuring third liquid requirement data of the brake caliper when the brake caliper is in a high-temperature declining state to a normal temperature state.
Specifically, when the vehicle resumes normal running after braking, the caliper is returned from a high temperature state to a normal temperature state. The third liquid requirement data is obtained by measuring the liquid consumption values of the brake caliper which are cooled to the normal temperature after the brake caliper is subjected to high temperature on an inertia test bed and the liquid consumption values of different preset working conditions so as to obtain the state change of the brake caliper after the vehicle is braked and returns to normal.
S105, evaluating the actual liquid requirement of the brake caliper on the vehicle according to the first liquid requirement data, the second liquid requirement data and the third liquid requirement data.
Specifically, the first liquid requirement data of the brake caliper, which are obtained under different preset working conditions in a normal temperature state, the second liquid requirement data of the brake caliper, which are obtained under a high temperature state, and the third liquid requirement data of the brake caliper, which are obtained under different preset working conditions, are measured, when the brake caliper is degenerated from the high temperature state to the normal temperature state, the first liquid requirement data, the second liquid requirement data and the third liquid requirement data are compared and analyzed, and the difference between the liquid requirements of the brake caliper in the high temperature state and the normal temperature state of the vehicle is counted, so that the liquid requirements of the brake caliper in different states in the actual running process of the vehicle are determined, and an adjustment basis is provided for the actual liquid requirement of the brake caliper when the vehicle leaves a factory.
According to the method for testing the liquid amount required by the brake caliper, the situation that an actual vehicle brakes in different running states is tested in advance, corresponding test parameters are collected, a database is formed by inputting a basic performance test stand and an inertia test stand of the brake caliper, then the measurement parameters required by measuring the liquid amount required by the brake caliper in different states in the running process of the simulated vehicle are respectively obtained, and multi-step comparison tests are carried out to obtain corresponding first liquid amount required data, second liquid amount required data and third liquid amount required data. Through carrying out comparative analysis on the magnitude of each data value, the actual liquid requirement of the brake caliper in the high temperature and the liquid requirement in the normal temperature state are counted, so that data support is provided for calibrating the electronic stability system and pedal feeling of the whole vehicle, the brake caliper can be tested in the normal temperature state and the high temperature state, the test requirement of the liquid requirement of the brake caliper in different working conditions is met, and the basis is provided for effectively rectifying and modifying the whole vehicle according to the difference between the liquid requirement of the brake caliper in the high temperature state and the normal temperature state, so as to improve the vehicle performance.
Alternatively, fig. 2 is a flow chart of yet another method for testing the amount of fluid required by a brake caliper according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 2, the method for testing the liquid amount required by the brake caliper according to the embodiment of the present invention includes:
s101, acquiring test parameters of the vehicle under preset working conditions.
And S201, measuring liquid demand data of the brake caliper under a braking working condition according to the test parameters in a normal temperature state.
In particular, the braking conditions may include different braking conditions during vehicle travel, such as: when the vehicle runs stably, the front intersection encounters a red light, and a driver can finish braking and stopping by slowly pressing 1/2 of the brake pedal; when the vehicle is in normal running, a small animal suddenly rushes out to the center of the road from the front of the vehicle, at the moment, the driver can quickly respond, and 3/4 of the brake pedal is immediately and even completely stepped on, so that the braking can be completed. Under the normal temperature test condition, a rotating speed is applied to the brake disc to drive the brake caliper to be tested to rotate at the normal temperature, such as 25 ℃ or 15 ℃ or 30 ℃, and the liquid demand data of the brake caliper under the simulated braking working condition is measured. Illustratively, the pressurization of the caliper to 4MPa and the release of the pressure are repeated 5 times, idling 120s without pressurization at a rotational speed of 80km/h, so as to separate the caliper pads from the brake disc before the braking condition is not performed. And then applying hydraulic pressure to 8MPa at a pressurizing speed of 0.4MPa/s, and detecting liquid consumption data of the brake caliper under normal-temperature braking working conditions.
S202, measuring liquid demand data of the brake caliper under a static working condition according to the test parameters in a normal temperature state.
Specifically, the braking working condition and the static working condition in the preset working condition can comprise all running states of the vehicle, the liquid requirements of the brake caliper under the braking working condition and the static working condition are respectively measured, the test result can be more accurate, and the provided data basis is more convincing. Illustratively, on the inertia test stand, the pressurization of the caliper to 4MPa and the release of the pressure are repeatedly performed 5 times, and then 120S is waited for to keep the time parameter in step S201 as a fixed amount, excluding the influence on the test due to different idle times in the braking condition and the stationary condition. And then applying hydraulic pressure to 8MPa at a pressurizing speed of 0.4MPa/s, and detecting liquid quantity consumption data of the brake caliper under normal temperature and static working conditions.
And S103, measuring second liquid requirement data of the brake caliper in a high-temperature state according to the test parameters.
And S104, measuring third liquid requirement data of the brake caliper when the brake caliper is in a high-temperature declining state to a normal temperature state.
S105, evaluating the actual liquid requirement of the brake caliper on the vehicle according to the first liquid requirement data, the second liquid requirement data and the third liquid requirement data.
Optionally, fig. 3 is a flowchart of a method for testing the fluid demand of a brake caliper according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 3, the method for testing the liquid amount required by the brake caliper according to the embodiment of the present invention includes:
s101, acquiring test parameters of the vehicle under preset working conditions.
S102, measuring first liquid requirement data of the brake caliper in a normal temperature state according to the test parameters.
S301, measuring liquid demand data of the brake caliper at a first preset temperature according to the test parameters.
In particular, the first preset temperature may comprise the temperature at which the brake caliper is located when the vehicle is braked slightly. When the driver actually drives, the brake pedal is lightened, and the temperature of the brake caliper can be raised to about 100 ℃. The first preset temperature may be set to 90 ℃, 100 ℃, 120 ℃ or the like, for example, without any limitation. Illustratively, a speed of 50km/h is applied to the brake disc to rotate the brake caliper, a hydraulic pressure of 1MPa is applied to the brake caliper, the brake disc temperature is dragged to a first preset temperature, for example, 100 ℃, then the application of the rotational speed is stopped, the brake caliper is stopped, the hydraulic pressure is applied to 8MPa at a pressurizing speed of 0.4MPa/s, the pressurization is performed for 3 times, and the liquid amount consumption data of each brake caliper is detected to obtain liquid amount demand data of the brake caliper when the brake pedal is at a light point.
S302, measuring liquid demand data of the brake caliper at a second preset temperature according to the test parameters.
Specifically, the second preset temperature may be a temperature that the brake caliper may reach when the driver depresses 1/2 of the brake pedal during actual driving, and may be, for example, 300 ℃, 305 ℃, 290 ℃, 320 ℃, or the like, without any limitation. It should be noted that the second preset temperature is greater than the first preset temperature. For example, on the inertia test stand, the temperature of the brake disc is dragged to 300 ℃, and the rest of test operations and parameters are the same as those in step S301, which are not described herein, and the liquid demand data of the brake caliper at the second preset temperature is measured.
S303, measuring liquid demand data of the brake caliper at a third preset temperature according to the test parameters.
Specifically, the third preset temperature may be a temperature reached by the brake caliper when the driver suddenly brakes in an emergency in actual driving. Illustratively, the third predetermined temperature may be 500 ℃, 505 ℃, 490 ℃, 520 ℃, or the like, without any limitation herein. It should be noted that the third preset temperature is greater than the second preset temperature. For example, the temperature of the brake disc is dragged to 500 ℃, and the rest of test operations and parameters are the same as those in step S301, which are not described herein, and the liquid requirement data when the brake caliper reaches the third preset temperature under the emergency braking condition of the vehicle is measured.
It should be noted that, in the actual braking process of the vehicle, the temperature of the brake caliper is raised due to heat generated during friction braking, the temperature raising range is about 100-500 ℃, and in this embodiment, three preset temperatures in this temperature range are selected for testing, and optionally, the temperature difference between the first preset temperature and the second preset temperature is equal to the temperature difference between the second preset temperature and the third preset temperature, so that the difference of the liquid requirements of the brake caliper between the condition of slightly pressing the brake pedal and the condition of fully pressing the brake pedal can be measured respectively, and the test data is more fit with the actual running condition of the vehicle. For example: the first preset temperature may be 100 ℃, and the second and third preset temperatures may be 300 ℃ and 500 ℃; the first preset temperature may also be 150 ℃, and the second and third preset temperatures may be 300 ℃ and 450 ℃.
And S104, measuring third liquid requirement data of the brake caliper when the brake caliper is in a high-temperature declining state to a normal temperature state.
S105, evaluating the actual liquid requirement of the brake caliper on the vehicle according to the first liquid requirement data, the second liquid requirement data and the third liquid requirement data.
Alternatively, fig. 4 is a flowchart of a method for testing the fluid demand of a brake caliper according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 4, the method for testing the liquid amount required by the brake caliper according to the embodiment of the present invention includes:
s101, acquiring test parameters of the vehicle under preset working conditions.
S102, measuring first liquid requirement data of the brake caliper in a normal temperature state according to the test parameters.
And S103, measuring second liquid requirement data of the brake caliper in a high-temperature state according to the test parameters.
S401, measuring liquid demand data of the brake caliper under a braking working condition when the brake caliper is declined to a normal temperature state through high temperature.
Specifically, when the vehicle actually runs, the driver presses the brake pedal and then releases the brake pedal, the vehicle continues to run normally, and the temperature of the brake caliper is firstly increased and then reduced to the normal temperature in the process, so that the liquid demand of the brake caliper when the brake caliper is subjected to high temperature and is reduced to the normal temperature is measured, and the liquid demand condition of the brake caliper when the vehicle continues to run normally after one-time braking or continuous repeated braking can be obtained. For example, on the inertia test stand, after the temperature of the brake disc is dragged to a certain value, the brake disc is degraded to a normal temperature state, and the rest of test operations and parameters are the same as those in step S201, which is not described herein. Thus, the liquid requirement data of the brake caliper can be obtained when the vehicle continues to run after being braked.
And S402, measuring liquid demand data of the brake caliper under a static working condition when the brake caliper is declined to a normal temperature state at a high temperature.
Specifically, when the vehicle actually runs, the driver presses the brake pedal and then releases the brake pedal, the vehicle stops, the brake caliper can be subjected to high temperature and then is cooled to a normal temperature, and the vehicle is in a static working condition. And measuring the liquid demand of the brake caliper under the static working condition after the brake caliper is degenerated to normal temperature at high temperature, and obtaining the liquid demand of the brake caliper after the vehicle stops braking. For example, on the inertia test stand, after the temperature of the brake disc is dragged to a certain value, the brake disc is then degraded to a normal temperature state, the liquid demand data of the brake caliper is measured, and the rest of the test operations are the same as those in step S202, and are not described herein.
S105, evaluating the actual liquid requirement of the brake caliper on the vehicle according to the first liquid requirement data, the second liquid requirement data and the third liquid requirement data.
Alternatively, fig. 5 is a flowchart of a method for testing the fluid demand of a brake caliper according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 5, the method for testing the liquid amount required by the brake caliper according to the embodiment of the present invention includes:
s101, acquiring test parameters of the vehicle under preset working conditions.
S102, measuring first liquid requirement data of the brake caliper in a normal temperature state according to the test parameters.
And S103, measuring second liquid requirement data of the brake caliper in a high-temperature state according to the test parameters.
And S104, measuring third liquid requirement data of the brake caliper when the brake caliper is in a high-temperature declining state to a normal temperature state.
S501, pressurizing and releasing the pressure to the brake caliper, and repeating the operation for a preset number of times.
Specifically, the pre-pressing step of the liquid requirement test of the brake caliper is completed by pressing the brake caliper to a certain pressure and then releasing the pressure and repeating the process for a plurality of times. After the brake caliper newly shipped is thoroughly exhausted, substances such as air, impurities and the like still remain in the brake caliper, and the accuracy of the result of the liquid demand test of the test brake caliper can be affected. Therefore, the brake fluid is fully filled in the inner cavity of the whole brake caliper before the test for a plurality of times, so that the brake caliper can normally work under ideal conditions within an error allowable range, and the influence of external interference factors on test results is reduced. The number of pre-pressing times can be obtained from a pre-constructed database according to the test working conditions.
S502, measuring the pressurized brake caliper, and then subjecting the pressurized brake caliper to high-temperature liquid demand data.
Specifically, the brake caliper after being pre-pressed is closer to an ideal working state, liquid demand data of the brake caliper at a high temperature after being influenced by pre-pressing reduction interference factors is obtained through testing, and data measured at the high temperature without pre-pressing are compared, so that test result data are optimized.
S105, evaluating the actual liquid requirement of the brake caliper on the vehicle according to the first liquid requirement data, the second liquid requirement data and the third liquid requirement data.
Alternatively, fig. 6 is a flowchart of a method for testing the fluid demand of a brake caliper according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 6, the method for testing the liquid amount required by the brake caliper according to the embodiment of the present invention includes:
s101, acquiring test parameters of the vehicle under preset working conditions.
S102, measuring first liquid requirement data of the brake caliper in a normal temperature state according to the test parameters.
And S103, measuring second liquid requirement data of the brake caliper in a high-temperature state according to the test parameters.
And S104, measuring third liquid requirement data of the brake caliper when the brake caliper is in a high-temperature declining state to a normal temperature state.
S501, pressurizing and releasing the pressure to the brake caliper, and repeating the operation for a preset number of times.
S5021, measuring the liquid demand of the pre-pressed brake caliper after the brake caliper is subjected to the first preset temperature decay.
Specifically, after the influence of disturbance factors is reduced by pre-pressing of the brake caliper, the influence of pre-pressing on the liquid requirement of the brake caliper can be known by simulating the situation that the vehicle is braked and then returns to a normal state and measuring the liquid requirement data when the brake pedal is lightly stepped on in the running process of the vehicle. Illustratively, the brake disc is rotated at a speed of 50km/h on an inertia test stand, a hydraulic pressure of 1MPa is applied to the brake caliper, the temperature of the brake disc is dragged to 100 ℃, the brake caliper is pressurized to 4MPa and the pressure is released, the process is repeated 5 times, the brake disc is idled at a speed of 80km/h for 120s, then the brake disc is stopped, the temperature is lowered to normal temperature, the hydraulic pressure is applied to 8MPa at a pressure-increasing speed of 0.4MPa/s, and the liquid demand of the brake caliper at this time is measured. The brake caliper is cooled from a high temperature to a normal temperature state, which may include a temperature around 50 ℃, without any limitation.
And S5022, measuring the liquid demand of the pre-pressed brake caliper after the brake caliper is subjected to second preset temperature decay.
Illustratively, the temperature of the brake disc is pulled to 300 ℃, the brake caliper is preloaded, and the rest of the test operations and parameters are the same as those in step S5021, which are not described herein.
S5023, measuring the liquid demand of the pre-pressed brake caliper after the brake caliper is subjected to the third preset temperature decay.
Illustratively, the temperature of the brake disc is pulled to 500 ℃, and the rest of the test operations and parameters are the same as those in step S5021, which are not described herein.
After the pre-pressing is measured, the liquid required amount of the brake caliper is reduced to normal temperature after three preset temperatures are experienced, so that the test result is more fit with the actual situation, and the brake caliper has reference.
S105, evaluating the actual liquid requirement of the brake caliper on the vehicle according to the first liquid requirement data, the second liquid requirement data and the third liquid requirement data.
Alternatively, fig. 7 is a flowchart of a method for testing the fluid demand of a brake caliper according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 7, the method for testing the liquid amount required by the brake caliper according to the embodiment of the present invention includes:
s101, acquiring test parameters of the vehicle under preset working conditions.
S102, measuring first liquid requirement data of the brake caliper in a normal temperature state according to the test parameters.
And S103, measuring second liquid requirement data of the brake caliper in a high-temperature state according to the test parameters.
And S104, measuring third liquid requirement data of the brake caliper when the brake caliper is in a high-temperature declining state to a normal temperature state.
S501, pressurizing and releasing the pressure to the brake caliper, and repeating the operation for a preset number of times.
S502, measuring the pressurized brake caliper, and then subjecting the pressurized brake caliper to high-temperature liquid demand data.
S601, measuring liquid demand data of the brake caliper in a normal temperature state after pre-pressing and high temperature decay.
Specifically, for the situation that the pre-pressing and high-temperature braking decline to normal temperature, the liquid demand of the brake caliper at normal temperature can be measured when the vehicle returns to normal after actual braking, so as to optimize and improve the situation that the pedal feel of the vehicle possibly appears abnormal. Pedal paresthesia may include depressing the brake pedal the same amount, but deceleration may become small and fail to reduce the vehicle speed to a certain value or stop within a certain distance.
S105, evaluating the actual liquid requirement of the brake caliper on the vehicle according to the first liquid requirement data, the second liquid requirement data and the third liquid requirement data.
Alternatively, fig. 8 is a flowchart of a method for testing the fluid demand of a brake caliper according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 8, the method for testing the liquid amount required by the brake caliper according to the embodiment of the present invention includes:
s101, acquiring test parameters of the vehicle under preset working conditions.
S102, measuring first liquid requirement data of the brake caliper in a normal temperature state according to the test parameters.
And S103, measuring second liquid requirement data of the brake caliper in a high-temperature state according to the test parameters.
And S104, measuring third liquid requirement data of the brake caliper when the brake caliper is in a high-temperature declining state to a normal temperature state.
S501, pressurizing and releasing the pressure to the brake caliper, and repeating the operation for a preset number of times.
S502, measuring the pressurized brake caliper, and then subjecting the pressurized brake caliper to high-temperature liquid demand data.
And S6011, carrying out pre-pressing and high-temperature decay on liquid demand data of the brake caliper in the braking process in a normal temperature state.
Specifically, the pedal feel of the vehicle can be further optimized by measuring the brake caliper liquid demand when the vehicle is braked and returns to normal running after the pre-pressing. Illustratively, after being pre-pressed and decayed to a normal temperature state at a high temperature, the test operation of step S201 is repeated, and the fluid consumption value of the brake caliper when the vehicle returns from the braking state to the normal running state after being pre-pressed is measured.
S6012, carrying out pre-pressing and high-temperature decay on liquid demand data of the brake caliper under a static working condition in a normal temperature state.
Specifically, the brake caliper liquid demand after pre-pressing and stopping after the vehicle braking is measured can fully count the brake caliper liquid demand data of the vehicle under various working conditions in actual operation, so that the test result of the brake caliper liquid demand data is more complete, and the accuracy of the brake caliper liquid demand test is improved. Illustratively, after being pre-pressed and decayed to normal temperature at high temperature, the test operation of step S202 is repeated to measure the brake caliper liquid demand.
S105, evaluating the actual liquid requirement of the brake caliper on the vehicle according to the first liquid requirement data, the second liquid requirement data and the third liquid requirement data.
Alternatively, fig. 9 is a flowchart of a method for testing the fluid demand of a brake caliper according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 9, the method for testing the liquid amount required by the brake caliper according to the embodiment of the present invention includes:
s101, acquiring test parameters of the vehicle under preset working conditions.
S102, measuring first liquid requirement data of the brake caliper in a normal temperature state according to the test parameters.
And S701, grinding the brake caliper.
Specifically, the running-in method specified in the existing SAE 2521 is adopted in the embodiment, and running-in treatment is performed on the brake caliper, so that the friction plate and the brake disc of the brake caliper are tightly attached, the influence of interference factors on a liquid demand test is reduced, the result is optimized, and the pedal feel of the whole automobile and the calibration of an electronic stabilizing system of the automobile are further optimized.
S702, under the braking working condition in a simulated normal temperature state on an inertia test bench, measuring the liquid requirement data of the brake caliper after running-in.
Specifically, the state of the brake caliper can be improved after the brake caliper is worn in, the interference of external factors can be further reduced by measuring the liquid demand data of the brake caliper after the brake caliper is worn in, and the liquid demand data of the brake caliper under normal-temperature braking working conditions is measured to obtain the influence of the brake caliper on the liquid demand during the braking of the vehicle in the running process after the brake caliper is worn in.
S703, under the static working condition of simulating normal temperature on an inertia test bench, measuring the liquid requirement data of the brake caliper after running-in.
Likewise, after the brake caliper is ground in, the brake caliper liquid-demand data under normal-temperature static working conditions is measured, so that a test result can be more fit with the actual situation, and the accuracy of the brake caliper liquid-demand test is further improved.
And S103, measuring second liquid requirement data of the brake caliper in a high-temperature state according to the test parameters.
And S104, measuring third liquid requirement data of the brake caliper when the brake caliper is in a high-temperature declining state to a normal temperature state.
S105, evaluating the actual liquid requirement of the brake caliper on the vehicle according to the first liquid requirement data, the second liquid requirement data and the third liquid requirement data.
The embodiment of the invention also provides a system for testing the liquid amount required by the brake caliper. Fig. 10 is a block diagram of a system for testing the amount of fluid required for a brake caliper according to an embodiment of the present invention. Referring to fig. 10, a brake caliper required liquid amount test system 50 according to an embodiment of the present invention includes:
the parameter acquisition module 10 is configured to acquire test parameters of the vehicle under a preset working condition.
The brake caliper basic performance test stand 20 is used for measuring first liquid demand data of the brake caliper at normal temperature according to the test parameters.
And the inertia test stand 30 is used for measuring second liquid requirement data of the brake caliper in a high-temperature state according to the test parameters.
The inertia test stand 30 is also used for measuring third liquid demand data of the brake caliper when the brake caliper is degraded to a normal temperature state through high temperature.
And an evaluation module 40 for evaluating the actual liquid demand of the brake caliper on the vehicle according to the first liquid demand data, the second liquid demand data and the third liquid demand data.
Optionally, with continued reference to fig. 10, the inertia test stand 30 in the brake caliper required fluid amount test system 50 according to the embodiment of the present invention is further configured to measure the required fluid amount data of the brake caliper under the brake working condition according to the test parameters in the normal temperature state. And under the normal temperature state, measuring the liquid demand data of the brake caliper under the static working condition according to the test parameters.
Optionally, with continued reference to fig. 10, the inertia test stand 30 in the brake caliper required fluid amount test system 50 according to the embodiment of the present invention is further configured to measure the required fluid amount data of the brake caliper at the first preset temperature according to the test parameters. And measuring liquid demand data of the brake caliper at a second preset temperature according to the test parameters. And measuring liquid demand data of the brake caliper at a third preset temperature according to the test parameters.
Optionally, with continued reference to fig. 10, the inertia test stand 30 in the brake caliper required fluid amount test system 50 according to the embodiment of the present invention is further configured to measure the required fluid amount data of the brake caliper under the braking condition when the brake caliper is degraded to the normal temperature state at a high temperature. And when the brake caliper is in a high-temperature fading state to a normal-temperature state, measuring liquid demand data of the brake caliper under a static working condition.
Fig. 11 is a block diagram of a further brake caliper required fluid amount test system according to an embodiment of the present invention. Referring to fig. 11, a system 50 for testing a required fluid amount of a brake caliper according to an embodiment of the present invention further includes:
the pre-pressing module 60 is used for pressurizing and releasing the brake caliper, and repeating the pre-setting times.
The inertia test stand 30 is also used for measuring the liquid demand data of the pressurized brake caliper, which is subjected to high temperature.
Optionally, with continued reference to fig. 11, the inertia test stand 30 in the brake caliper required fluid amount test system 50 according to the embodiment of the present invention is further configured to measure the fluid amount required by the pre-pressed brake caliper after the brake caliper has undergone the first preset temperature decay. The liquid demand of the pre-pressed brake caliper after experiencing a second preset temperature decay is measured. And measuring the liquid requirement amount of the pre-pressed brake caliper after the brake caliper is subjected to the third preset temperature decay.
Optionally, with continued reference to fig. 11, the inertia test stand 30 in the brake caliper required fluid amount test system 50 according to the embodiment of the present invention is further configured to measure the required fluid amount data of the brake caliper in the normal temperature state after the pre-compression and the high temperature decay.
Optionally, with continued reference to fig. 11, the inertia test stand 30 in the brake caliper required fluid amount test system 50 according to the embodiment of the present invention is further configured to measure the fluid amount required by the pre-pressed brake caliper after the brake caliper has undergone the first preset temperature decay. The liquid demand of the pre-pressed brake caliper after experiencing a second preset temperature decay is measured. And measuring the liquid requirement amount of the pre-pressed brake caliper after the brake caliper is subjected to the third preset temperature decay.
Fig. 12 is a block diagram of a further brake caliper required fluid amount testing system according to an embodiment of the present invention. Referring to fig. 12, a system 50 for testing a required fluid amount of a brake caliper according to an embodiment of the present invention further includes:
and a running-in module 70 for running-in the brake caliper.
The inertia test stand 30 is further used for measuring liquid requirement data of the brake caliper after running-in under a braking working condition in a simulated normal temperature state on the inertia test stand; and under the static working condition of simulating the normal temperature on the inertia test table, measuring the liquid requirement data of the brake caliper after running-in.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (6)
1. A method of testing the amount of fluid required for a brake caliper, comprising:
acquiring test parameters of the vehicle under a preset working condition;
according to the test parameters, measuring first liquid demand data of the brake caliper at normal temperature;
measuring second liquid demand data of the brake caliper in a high-temperature state according to the test parameters;
measuring third liquid requirement data of the brake caliper when the brake caliper decays to a normal temperature state through high temperature;
evaluating an actual liquid demand of the brake caliper on the vehicle according to the first liquid demand data, the second liquid demand data and the third liquid demand data;
according to the test parameters, measuring first liquid demand data of the brake caliper in a normal temperature state comprises the following steps:
measuring liquid demand data of the brake caliper under a braking working condition according to the test parameters in a normal temperature state;
measuring liquid demand data of the brake caliper under a static working condition according to the test parameters in a normal temperature state;
and according to the test parameters, measuring second liquid requirement data of the brake caliper in a high-temperature state, wherein the second liquid requirement data comprises the following steps:
according to the test parameters, measuring liquid demand data of the brake caliper at a first preset temperature;
according to the test parameters, measuring liquid demand data of the brake caliper at a second preset temperature;
according to the test parameters, measuring liquid demand data of the brake caliper at a third preset temperature;
the measuring of the third liquid demand data of the brake caliper when the brake caliper is degraded to a normal temperature state through high temperature includes:
when the brake caliper is in a high-temperature decline to normal temperature state, measuring liquid demand data of the brake caliper under a braking working condition;
when the brake caliper is in a high-temperature decline to normal temperature state, measuring liquid demand data of the brake caliper under a static working condition;
after the measuring the third liquid demand data of the brake caliper when the temperature is reduced to the normal temperature state, further comprising:
pressurizing and releasing the pressure of the brake caliper, and repeating the operation for preset times;
and measuring the liquid demand data of the pressurized brake caliper, which is subjected to high temperature.
2. A method of testing the fluid demand of a brake caliper according to claim 1, wherein said measuring the fluid demand data of said pressurized brake caliper, which is subjected to a high temperature, comprises:
measuring the liquid demand of the pre-pressed brake caliper after the brake caliper is subjected to a first preset temperature decay;
measuring the liquid demand of the pre-pressed brake caliper after the brake caliper is subjected to the second preset temperature decay;
and measuring the liquid demand of the pre-pressed brake caliper after the brake caliper is subjected to the third preset temperature decay.
3. A method of testing the fluid demand of a brake caliper according to claim 1, further comprising, after said measuring the fluid demand data of the pressurized brake caliper subjected to a high temperature:
and measuring liquid demand data of the brake caliper in a normal temperature state after pre-pressing and high-temperature decay.
4. A method for measuring a liquid amount required for a brake caliper according to claim 3, wherein said measuring the liquid amount required data of said brake caliper in a normal temperature state after pre-pressing and high temperature decay comprises:
in a normal temperature state, the brake caliper after prepressing and high temperature decay has liquid demand data under a braking working condition;
and in a normal temperature state, the liquid demand data of the brake caliper under a static working condition after pre-pressing and high-temperature decay.
5. The method for measuring a liquid amount required for a brake caliper according to claim 1, further comprising, before said measuring second liquid amount required data of the brake caliper in a high temperature state according to said test parameter:
running in the brake caliper;
under the braking working condition in a normal temperature simulated state on an inertia test bench, measuring the liquid requirement data of the brake caliper after running-in;
and under the static working condition of simulating the normal temperature on an inertia test table, measuring the liquid requirement data of the brake caliper after running-in.
6. A fluid demand test system for a brake caliper, comprising:
the parameter acquisition module is used for acquiring test parameters of the vehicle under a preset working condition;
the basic performance test stand of the brake caliper is used for measuring first liquid requirement data of the brake caliper in a normal temperature state according to the test parameters;
the inertia test stand is used for measuring second liquid requirement data of the brake caliper in a high-temperature state according to the test parameters;
the inertia test stand is also used for measuring third liquid requirement data of the brake caliper when the brake caliper is in a high-temperature fading state to a normal temperature state;
the evaluation module is used for evaluating the actual liquid requirement of the brake caliper on the vehicle according to the first liquid requirement data, the second liquid requirement data and the third liquid requirement data;
the brake caliper required liquid amount test system employs the brake caliper required liquid amount test method according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111383700.XA CN113933069B (en) | 2021-11-22 | 2021-11-22 | Method and system for testing liquid amount required by brake caliper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111383700.XA CN113933069B (en) | 2021-11-22 | 2021-11-22 | Method and system for testing liquid amount required by brake caliper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113933069A CN113933069A (en) | 2022-01-14 |
| CN113933069B true CN113933069B (en) | 2024-03-15 |
Family
ID=79287283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111383700.XA Active CN113933069B (en) | 2021-11-22 | 2021-11-22 | Method and system for testing liquid amount required by brake caliper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113933069B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6148621A (en) * | 1984-08-13 | 1986-03-10 | Nissin Kogyo Kk | Caliper body of vehicle disc brake |
| CN203836043U (en) * | 2014-05-15 | 2014-09-17 | 英轩重工有限公司 | Loader brake caliper radiator |
| CN104089782A (en) * | 2014-06-27 | 2014-10-08 | 杭州沃镭科技有限公司 | Device and method for testing liquid consumption of hydraulic brake caliper comprehensive performance test bed |
| CN105547713A (en) * | 2016-01-25 | 2016-05-04 | 安徽农业大学 | Brake fluid required amount testing device of automobile braking system and application thereof |
| CN205317488U (en) * | 2016-01-25 | 2016-06-15 | 安徽农业大学 | Automobile brake system's brake fluid needs liquid measure testing arrangement |
| CN110654366A (en) * | 2018-06-29 | 2020-01-07 | 沃尔沃汽车公司 | Method and system for estimating the moisture content of brake fluid in a brake system |
| CN111751097A (en) * | 2020-06-24 | 2020-10-09 | 中国第一汽车股份有限公司 | Method for testing liquid amount required by automobile brake |
| CN111795830A (en) * | 2020-05-25 | 2020-10-20 | 中国第一汽车股份有限公司 | Brake efficiency testing method |
| CN111907500A (en) * | 2020-08-07 | 2020-11-10 | 格陆博科技有限公司 | Novel electro-hydraulic combined braking system and braking method thereof |
| CN214578477U (en) * | 2021-02-24 | 2021-11-02 | 广州汽车集团股份有限公司 | Brake caliper and automobile |
-
2021
- 2021-11-22 CN CN202111383700.XA patent/CN113933069B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6148621A (en) * | 1984-08-13 | 1986-03-10 | Nissin Kogyo Kk | Caliper body of vehicle disc brake |
| CN203836043U (en) * | 2014-05-15 | 2014-09-17 | 英轩重工有限公司 | Loader brake caliper radiator |
| CN104089782A (en) * | 2014-06-27 | 2014-10-08 | 杭州沃镭科技有限公司 | Device and method for testing liquid consumption of hydraulic brake caliper comprehensive performance test bed |
| CN105547713A (en) * | 2016-01-25 | 2016-05-04 | 安徽农业大学 | Brake fluid required amount testing device of automobile braking system and application thereof |
| CN205317488U (en) * | 2016-01-25 | 2016-06-15 | 安徽农业大学 | Automobile brake system's brake fluid needs liquid measure testing arrangement |
| CN110654366A (en) * | 2018-06-29 | 2020-01-07 | 沃尔沃汽车公司 | Method and system for estimating the moisture content of brake fluid in a brake system |
| CN111795830A (en) * | 2020-05-25 | 2020-10-20 | 中国第一汽车股份有限公司 | Brake efficiency testing method |
| CN111751097A (en) * | 2020-06-24 | 2020-10-09 | 中国第一汽车股份有限公司 | Method for testing liquid amount required by automobile brake |
| CN111907500A (en) * | 2020-08-07 | 2020-11-10 | 格陆博科技有限公司 | Novel electro-hydraulic combined braking system and braking method thereof |
| CN214578477U (en) * | 2021-02-24 | 2021-11-02 | 广州汽车集团股份有限公司 | Brake caliper and automobile |
Non-Patent Citations (3)
| Title |
|---|
| 基于AMESim的制动钳动态所需液量检测仿真研究;赵晨馨;范伟军;杨维和;郭斌;张培培;;计算机测量与控制(第01期);全文 * |
| 汽车制动钳体所需液量的检测与浅析;沈达;汽车技术(第05期);全文 * |
| 汽车制动钳所需液量检测***设计;赵晨馨;范伟军;杨维和;郭斌;胡晓峰;;汽车技术(第11期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113933069A (en) | 2022-01-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Subramanian et al. | A diagnostic system for air brakes in commercial vehicles | |
| DE102014119024B4 (en) | System and method for warning of wear of a brake friction lining of a vehicle | |
| AU2009286562B2 (en) | Method of and apparatus for monitoring the performance of a vehicle braking system | |
| JP2017524937A (en) | Method and test bench for testing a composite of vehicle components | |
| CN111398162B (en) | Method for testing friction coefficient of air pressure disc type brake assembly of commercial vehicle | |
| CN107525679A (en) | Test method for the braking shake evaluation of motor vehicle | |
| CN114509275A (en) | Method for testing pressure characteristic of caliper brake on road and operation method of control device | |
| CN113933069B (en) | Method and system for testing liquid amount required by brake caliper | |
| Natarajan et al. | A model of the relay valve used in an air brake system | |
| Revin et al. | Methods of monitoring the technical condition of the braking system of an autonomous vehicle during operation | |
| CN106525447A (en) | Air pressure brake system's comprehensive performance simulating apparatus and method | |
| RU2297932C1 (en) | Methods of diagnosing condition of brake system of automobile furnished with antilocking system (versions); method of and device for diagnosing condition of automobile brake system | |
| CN205981716U (en) | Air braking system comprehensive properties analogue means | |
| CN106414195A (en) | Method for testing brake systems of motor vehicles | |
| Antanaitis | Vehicle level brake drag target setting for EPA fuel economy certification | |
| KR20220166089A (en) | Electronic bracking apparatus inspecting system | |
| CN115270463A (en) | Simulation analysis method for performance of automobile braking system | |
| Schramm et al. | Test Procedure Development and Validation for Brake Wet Fading in the FKFS Thermal Wind Tunnel | |
| Muthoriq et al. | Enhancement of a roller brake tester for modelling the tire | |
| Oldershaw et al. | Brake road testing in the laboratory | |
| Ervin | Braking efficiency test technique. Technical report. Final report | |
| CN110887650B (en) | Test method for obtaining high-temperature-resistant range of brake pad | |
| Cantoni et al. | Tire and Brake Interaction-A New Test Rig to Study Wheel Locking | |
| Ervin et al. | Preliminary measurements of the longitudinal traction properties of truck tires | |
| Schmid et al. | From Real to Virtual Tyre Tyre Model Parameterisation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |