CN111795830A - Brake efficiency testing method - Google Patents
Brake efficiency testing method Download PDFInfo
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- CN111795830A CN111795830A CN202010453440.8A CN202010453440A CN111795830A CN 111795830 A CN111795830 A CN 111795830A CN 202010453440 A CN202010453440 A CN 202010453440A CN 111795830 A CN111795830 A CN 111795830A
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- 238000012360 testing method Methods 0.000 title claims abstract description 128
- 238000000034 method Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 claims description 2
- 238000011056 performance test Methods 0.000 description 7
- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
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- 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
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- General Physics & Mathematics (AREA)
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Abstract
The invention relates to the technical field of automobiles, in particular to a brake efficiency testing method, which comprises the following steps: arranging a brake test sample on an inertia test bed; setting the test inertia of the inertia test bed; setting a braking initial speed and a braking final speed on the inertia test bed; setting a brake hydraulic pressure in the inertia test stand; after the inertia test bed collects that the temperature of the friction plate of the brake test sample piece reaches a set temperature, the brake disc of the inertia test bed rotates at the initial braking speed and is abutted against the friction plate to start braking according to the braking hydraulic pressure until the rotating speed of the brake disc is reduced to the final braking speed; and the inertia test bed acquires the maximum braking moment, the average braking moment and the average friction coefficient of the brake test sample piece at the set temperature and the braking hydraulic pressure. The invention identifies the risk of the insufficiency of the subsequent high brake hydraulic pressure efficiency of the whole vehicle in advance.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a brake efficiency testing method.
Background
The brake performance test of the current passenger car has two modes, one mode is to use an inertia test bed to carry out the performance test, an AK-master program is generally used, and the other mode is to use the whole car to carry out the performance test; generally, after the brake efficiency needs to meet the test requirement of the AK-master program efficiency of the inertia test bed, the whole vehicle efficiency test is carried out. In the project development, the problem of insufficient brake performance under high brake hydraulic pressure (more than 80bar) in the whole vehicle performance test occurs, the problem cannot be identified from the performance test of the early-stage inertia test bed, and the product performance is influenced or the development period is delayed.
Therefore, a method for testing the performance of the brake is needed to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a brake effectiveness testing method which can identify the brake effectiveness under brake hydraulic pressure in an inertia test bed effectiveness test and identify the risk of insufficient subsequent high brake hydraulic pressure effectiveness of the whole vehicle in advance.
In order to achieve the purpose, the invention adopts the following technical scheme:
a brake performance testing method, comprising the steps of:
s1, arranging the brake test sample piece on an inertia test bed;
s2, setting the test inertia of the inertia test bed;
s3, setting a braking initial speed and a braking final speed on the inertia test bed;
s4, setting brake hydraulic pressure in the inertia test stand;
s5, after the inertia test bed collects that the temperature of the friction plate of the brake test sample piece reaches a set temperature, the brake disc of the inertia test bed rotates at the initial braking speed and is abutted against the friction plate to start braking according to the braking hydraulic pressure until the rotating speed of the brake disc is reduced to the final braking speed;
and S6, the inertia test bed collects the maximum braking torque, the average braking torque and the average friction coefficient of the brake test sample piece at the set temperature and the braking hydraulic pressure.
Optionally, in the step S2, after the test inertia is set, the brake test sample is run-in.
Optionally, in the step S2, the test inertia is a corresponding test inertia of the vehicle under a full load condition.
Optionally, the test environment temperature of the brake test sample is 20 ± 2 ℃.
Optionally, the brake test sample has a test ambient humidity of 75 ± 5%.
Optionally, the brake test sample is left to stand for more than 24 hours after production before testing.
Alternatively, the brake test piece is allowed to stand for 24 hours or more, and then is transferred to a predetermined test environment and allowed to stand for 1 hour for testing.
Optionally, in step S5, the set temperature is set between 23 ℃ and 130 ℃ according to actual needs.
Optionally, the braking hydraulic pressure is set between 0bar and 160bar according to actual needs.
Optionally, in step S3, the initial braking speed is 100km/h, and the final braking speed is 0 km/h.
The invention has the beneficial effects that:
the brake efficiency testing method provided by the invention comprises the steps of setting brake hydraulic pressure on an inertia test bed, testing after the temperature of a friction plate of a brake test sample piece reaches a set temperature according to the set initial brake speed and final brake speed, and analyzing the efficiency performance of the brake test sample piece by collecting the maximum brake torque, the average brake torque and the average friction coefficient of the brake test sample piece under the set temperature and the brake hydraulic pressure through the inertia test bed. The risk of insufficiency of the subsequent high brake hydraulic pressure efficiency of the whole vehicle can be identified in advance by setting the brake hydraulic pressure and the set temperature of the friction plates, different temperatures of the friction plates and different brake hydraulic pressures can be manually set and combined, and the efficiency performance of brake test samples under different temperatures of the friction plates and different brake hydraulic pressures under the condition of the same initial and final brake speeds is identified.
Drawings
FIG. 1 is a flow chart of a brake performance testing method according to the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings and the embodiment. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In order to identify the brake performance under brake hydraulic pressure in the performance test of the inertia test bed and identify the insufficient risk of the subsequent high brake hydraulic pressure performance of the whole vehicle in advance, as shown in fig. 1, the invention provides a brake performance test method, which comprises the following steps:
s1, arranging the brake test sample piece on an inertia test bed;
s2, setting the test inertia of the inertia test bed; in the present embodiment, the test inertia is a corresponding test inertia of the vehicle under a full load condition.
S3, setting a braking initial speed and a braking final speed on an inertia test bed; in the embodiment, the initial braking speed is 100km/h, and the final braking speed is 0km/h, so that the real working condition of the brake can be reflected under the initial braking speed and the final braking speed. In other embodiments, other initial and final brake speeds may be set without limitation.
S4, setting brake hydraulic pressure on an inertia test bed; specifically, the brake hydraulic pressure is set between 0bar and 160bar according to actual needs, and the pressure working condition of most of brake hydraulic pressure can be really covered within the range of 0bar to 160bar, so that the test requirements of most brakes are met.
S5, after the inertia test bed collects that the temperature of the friction plate of the brake test sample piece reaches a set temperature, the brake disc of the inertia test bed rotates at a braking initial speed and is abutted against the friction plate to start braking according to braking hydraulic pressure until the rotating speed of the brake disc is reduced to a braking final speed;
and S6, collecting the maximum braking torque, the average braking torque and the average friction coefficient of the brake test sample piece at the set temperature and the brake hydraulic pressure by the inertia test bed.
The brake fluid pressure is set on the inertia test bed, the test is carried out after the temperature of the friction plate of the brake test sample piece reaches the set temperature according to the set initial brake speed and the set final brake speed, and the inertia test bed collects the maximum brake torque, the average brake torque and the average friction coefficient of the brake test sample piece under the set temperature and the brake fluid pressure to analyze the performance of the brake test sample piece. The deficiency of brake performance confirmation of an AK-master program under the hydraulic pressure of more than 80bar can be made up by setting the brake hydraulic pressure and the set temperature of the friction plates, the risk of insufficient brake performance can be identified on an inertia test bed, and the temperatures of different friction plates and different brake hydraulic pressures can be artificially set and combined to identify the performance performances of brake test samples under the conditions of different friction plate temperatures and different brake hydraulic pressures at the same initial and final brake speeds.
Further, in step S2, after the test inertia is set, the brake test sample is run-in, and the surface of the brake disc and the surface of the friction plate are subjected to surface treatment by the run-in, so that the subsequent brake disc and the friction plate are more firmly abutted, and the test requirements are met.
Further, the test environment temperature of the brake test sample is 20 ± 2 ℃. The test environmental humidity of the brake test sample is 75 +/-5%.
Further, the brake test piece is left to stand for more than 24 hours after production before testing. Alternatively, the brake test piece may be left to stand for 24 hours or more in a predetermined test environment for 1 hour before the test is performed. Through the process, the internal stress of the brake test sample piece is eliminated, so that the maximum braking torque, the average braking torque and the average friction coefficient obtained by the test accurately reflect the performance of the brake.
Further, in step S5, the set temperature is set between 23 ℃ and 130 ℃ according to actual needs. The temperature range of the common friction plate of a common user can be covered by 23-130 ℃.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A brake performance testing method is characterized by comprising the following steps:
s1, arranging the brake test sample piece on an inertia test bed;
s2, setting the test inertia of the inertia test bed;
s3, setting a braking initial speed and a braking final speed on the inertia test bed;
s4, setting brake hydraulic pressure in the inertia test stand;
s5, after the inertia test bed collects that the temperature of the friction plate of the brake test sample piece reaches a set temperature, the brake disc of the inertia test bed rotates at the initial braking speed and is abutted against the friction plate to start braking according to the braking hydraulic pressure until the rotating speed of the brake disc is reduced to the final braking speed;
and S6, the inertia test bed collects the maximum braking torque, the average braking torque and the average friction coefficient of the brake test sample piece at the set temperature and the braking hydraulic pressure.
2. The brake performance testing method of claim 1, wherein in step S2, after the test inertia is set, the brake test sample is run-in.
3. The brake performance testing method of claim 1, wherein in step S2, the test inertia is a corresponding test inertia of the vehicle under a full load condition.
4. The brake performance testing method of claim 1, wherein the test environment temperature of the brake test sample is 20 ± 2 ℃.
5. The brake performance testing method of claim 1, wherein the test environmental humidity of the brake test sample is 75 ± 5%.
6. The method of claim 1, wherein the brake test sample is allowed to stand for more than 24 hours after production before testing.
7. The brake performance testing method according to claim 6, wherein the brake test sample is transferred to a predetermined test environment for standing for 1 hour after standing for more than 24 hours for testing.
8. The brake performance testing method of claim 1, wherein in step S5, the set temperature is set between 23 ℃ and 130 ℃ according to actual needs.
9. The brake performance testing method of claim 1, wherein the brake fluid pressure is set between 0bar and 160bar according to actual requirements.
10. The brake performance testing method of claim 1, wherein in step S3, the initial braking speed is 100km/h, and the final braking speed is 0 km/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010453440.8A CN111795830A (en) | 2020-05-25 | 2020-05-25 | Brake efficiency testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010453440.8A CN111795830A (en) | 2020-05-25 | 2020-05-25 | Brake efficiency testing method |
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| CN111795830A true CN111795830A (en) | 2020-10-20 |
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| CN202010453440.8A Pending CN111795830A (en) | 2020-05-25 | 2020-05-25 | Brake efficiency testing method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112903313A (en) * | 2021-02-05 | 2021-06-04 | 中汽院(重庆)汽车检测有限公司 | Stability test method for heavy-duty car brake system |
| CN113670499A (en) * | 2021-09-08 | 2021-11-19 | 西安建筑科技大学 | Braking efficiency test device and method for electric wheel driven vehicle |
| CN113933069A (en) * | 2021-11-22 | 2022-01-14 | 中国第一汽车股份有限公司 | Method and system for testing liquid amount required by brake caliper |
| CN114509275A (en) * | 2022-01-11 | 2022-05-17 | 中国第一汽车股份有限公司 | Method for testing pressure characteristic of caliper brake on road and operation method of control device |
| CN115308391A (en) * | 2022-07-05 | 2022-11-08 | 中国第一汽车股份有限公司 | Brake fluid high-temperature compatibility test method |
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2020
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112903313A (en) * | 2021-02-05 | 2021-06-04 | 中汽院(重庆)汽车检测有限公司 | Stability test method for heavy-duty car brake system |
| CN113670499A (en) * | 2021-09-08 | 2021-11-19 | 西安建筑科技大学 | Braking efficiency test device and method for electric wheel driven vehicle |
| CN113933069A (en) * | 2021-11-22 | 2022-01-14 | 中国第一汽车股份有限公司 | Method and system for testing liquid amount required by brake caliper |
| CN113933069B (en) * | 2021-11-22 | 2024-03-15 | 中国第一汽车股份有限公司 | Method and system for testing liquid amount required by brake caliper |
| CN114509275A (en) * | 2022-01-11 | 2022-05-17 | 中国第一汽车股份有限公司 | Method for testing pressure characteristic of caliper brake on road and operation method of control device |
| CN115308391A (en) * | 2022-07-05 | 2022-11-08 | 中国第一汽车股份有限公司 | Brake fluid high-temperature compatibility test method |
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Application publication date: 20201020 |