US20020017129A1 - Method and apparatus for brake leak detection - Google Patents
Method and apparatus for brake leak detection Download PDFInfo
- Publication number
- US20020017129A1 US20020017129A1 US09/767,309 US76730901A US2002017129A1 US 20020017129 A1 US20020017129 A1 US 20020017129A1 US 76730901 A US76730901 A US 76730901A US 2002017129 A1 US2002017129 A1 US 2002017129A1
- Authority
- US
- United States
- Prior art keywords
- brake
- vehicle
- contact
- brake pedal
- detector
- 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.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
- B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems
Definitions
- This invention relates generally to an apparatus for leakage testing fluid systems, and more particularly to an arrangement and method for testing vehicle hydraulic brake systems.
- a purpose of this invention is the capability of providing an accurate and straightforward leakage determination which can be easily and reliably installed.
- a vehicle brake leakage testing system can be easily mounted in association with and removed from the vehicle brake pedal.
- the brake leakage testing system comprises a brake leak detector assembly having at least a brake contact, a spring means, an output means, and a reference end, typically opposite the brake contact.
- the primary advantage provided by the present invention is to detect vehicle brake fluid leaks. Even an infinitesimal fluid loss can be detected at the factory, rather than after delivery to a customer. Furthermore, the brake leak detector is easy to install and can accurately determine if any brake fluid leaks are present on a vehicle in a matter of minutes.
- FIG. 1 is a side view illustrating the vehicle brake leakage testing system in accordance with the present invention
- FIG. 2 illustrates the vehicle brake leakage testing system of FIG. 1 in operation
- FIG. 3 is a block diagram of the brake leak detector circuit for controlling the vehicle brake leakage testing system of FIGS. 1 and 2, and providing vehicle brake leakage indication;
- FIGS. 4A and 4B show a table of test data results and the graphical representation of fluid leaks, respectively.
- a vehicle brake leakage testing system can be easily mounted in association with and removed from the vehicle brake pedal.
- the brake leakage testing system comprises a brake leak detector assembly having at least a brake contact, a sensor, a force applying means, an output means, and a reference end, typically opposite the brake contact.
- the reference end is located at any tangible reference location, such as in contact with the steering wheel of the vehicle.
- the brake pedal of the vehicle is depressed so as to securely wedge the brake leak detector assembly between the brake pedal and the tangible reference location, and encourage the spring means to apply the necessary force for pressurizing the brake fluid.
- the sensor is used to detect any leaks in the brake fluid line and the output means then indicates whether any leaks are detected in the brake fluid line.
- the device of the present invention is used when the vehicle is not running. There is electrical power to power the device as the vehicle is in an auxiliary mode.
- FIG. 1 illustrates a brake leak detector assembly 10 , in accordance with the present invention.
- a brake contact 12 comprises a foot/brake pedal bracket.
- the brake contact 12 is positioned so as to wedge the assembly 10 between the brake pedal 14 (at the brake contact 12 end) and a reference location (such as steering wheel 16 ) at reference end 18 , as illustrated in FIG. 2.
- a set screw 20 associated with a sliding collar 22 is loosened.
- the operator then sits in the driver's seat of the stationary vehicle and confirms that the steering wheel is straight and in the correct tilt position, before starting the vehicle.
- the brake leak detector pedal plate 12 is placed between the brake pedal 14 and the operators foot 24 .
- the operator confirms that the reference end 18 is properly positioned and the sliding collar 22 is correctly oriented.
- the engine is then turned off and the vehicle is placed in an auxiliary mode to provide electrical power to the assembly 10 .
- the correct orientation for the sliding collar 22 requires the sliding collar to make contact with sensor 26 , associated with circuit box 28 , illustrated in more detail in FIG. 3.
- the operator depresses the brake pedal 14 while pushing downward, into the brake pedal, on the assembly 10 , facilitated by force application means, such as springs 42 and 44 , or other such means, such as a screw assembly.
- Force application means such as springs 42 and 44 , or other such means, such as a screw assembly.
- Chain 46 and associated swivel location 48 can be used to hold the device together when the unit is not installed. This securely positions the assembly 10 between the pedal 14 and the steering wheel 16 (or other reference location).
- the sliding collar 22 should abut circuit box 28 , as sensed by sensor 26 and indicated by contact indicator 30 .
- the system is initialized.
- the set screw 20 is adjusted so that spring 42 displaces sliding collar 22 against sensor 26 , thereby activating the sensor 26 .
- brake pedal 12 can be depressed and locked to the reference end 18 and steering wheel 16 . This establishes a relative position.
- the spring 42 has set or defined the collar 22 against sensor 26 , SO that collar 22 is in contact with sensor 26 and set screw 20 is tightened.
- spring 44 exerts a pressure to push rod 45 associated with brake pedal 12 , maintaining the tension to push and keep pedal 12 down.
- the brake leak detector of the present invention was utilized on a 1999 Honda® Si.
- the vehicle was raised in the air and supported on jack stands, and all four wheels were removed. The following steps were then performed on each of the four wheels.
- a two inch hose on the left front caliper bleed screw was installed.
- the bleed screw was opened to fill the hose with fluid.
- the vehicle was then started, the brake leak detector of the present invention was properly installed, and the engine shut off and the vehicle placed in an auxiliary mode.
- the steering wheel was then lowered to its lowest tilt position, and the brake leak detector power cord was plugged into the 12 volt outlet of the vehicle.
- the sliding collar was positioned up on the shaft, as discussed above in reference to FIG. 1, thereby activating the sensor 26 and turning the test system on.
- a wrench was then placed on the left front bleed screw and slowly opened, releasing measured amounts of fluid, as indicated in the table of FIG. 4A.
- the number of drops released from the end of the hose before detection of the leak by the brake leak detector were counted. After detection of the leak, the bleed screw was closed. Once the vehicle was started, each of the subsequent steps was performed ten times, on each wheel, and recorded each time for the ten trials of each wheel indicated in FIG. 4A.
- the left front wheel is indicated as 60
- the right front wheel is indicated as 62
- the left rear wheel is indicated as 64
- the right rear wheel is indicated as 66 .
- the results of the test trials shows that detection of brake fluid leakage is detected in an amount as low as 0.2 cc, and not greater than 0.5 cc on average.
- the result of the testing proves that the brake leak detector will indicate if a vehicle leaks between 0 to 3 drops of brake fluid (0 to 1.0 cc) out of the system.
- Circuit box 28 houses brake leak detector circuitry which is used to produce an indication of “pass” or “fail” for brake fluid in a vehicle.
- an output light 32 is green to indicate an acceptable brake fluid system, and red to indicate an unacceptable brake fluid system, i.e., a fluid leak.
- An audible signal, such as buzzer 34 can also be incorporated to give additional indication of failure mode.
- circuitry to produce an indication of pass or fail for brake fluid
- suitable means and methods such as, for example, an oscillator system.
- timing means 52 such as an oscillator
- This slow 1 minute pulse train goes into logic block 54 , which comprises a serial to parallel converter having two functions. First, the converter is used as a counter until 5 pulse trains pass, which approximately represents 5 minutes and 30 seconds.
- a failure When a failure is detected, this is indicated by suitable means, such as a blocking transistor for blocking the timing clock pulse. This stops the timer and ensures the failed output stays activated. Since these five light outputs 36 can change incorrectly when failure occurs, a D-FF can be inserted as a timing light memory to help buffer switch spikes produced at the blocking transistor for the serial-to-parallel converter. This helps to prevent premature activation of the subsequent light, in light series 36 , when a failure occurs.
- suitable means such as a blocking transistor for blocking the timing clock pulse. This stops the timer and ensures the failed output stays activated. Since these five light outputs 36 can change incorrectly when failure occurs, a D-FF can be inserted as a timing light memory to help buffer switch spikes produced at the blocking transistor for the serial-to-parallel converter. This helps to prevent premature activation of the subsequent light, in light series 36 , when a failure occurs.
- the logic 58 of the circuit 50 uses two external inputs and one internal input.
- the two external inputs to logic are the leak detection sensor 26 and toggle switch 40 , as seen in FIG. 3.
- the internal input is the output of the serial-to-parallel converter after the 5 minute interval. This goes through a series of AND and INVERTER gates in block 54 to stop the timer 52 and keep the timing lights activated when failure occurs. The opposite is also true when a pass occurs, that is, a transistor of block 54 can be activated to block the detector switch 62 in case a detected failure happens after the 5 minutes is complete.
- the visual reference of the test duration is indicated at block 58 .
- test start switch 40 To initiate testing of the brake fluid condition, “test start” switch 40 is engaged, at which point the first of the series of lights 36 should turn on. If no leaks are detected, the second light 36 will come on after approximately 2 to 21 ⁇ 2 minutes; the third light 36 will come on after approximately 3 to 31 ⁇ 2 minutes; the fourth light 36 will come on after approximately 4 to 41 ⁇ 2 minutes; the fifth light 36 will come on after approximately 5 to 51 ⁇ 2 minutes; and the output light 32 will be green. Conversely, if a leak is detected, even a leak as seemingly insignificant as a single drop of fluid, audible indicator 34 will sound, output light 32 will be red, the lights 36 will stop illuminating, and contact indicator 30 will be off. In this manner, brake fluid condition for a vehicle can be quickly and accurately tested for.
- spring 42 operates on collar 22 when the set screw 20 is loose, positioning the face of collar 22 against sensor 26 .
- spring 42 is inoperable.
- spring 44 acts on rod element 45 against the brake pedal 14 , which brake pedal 14 resists (when there is no leak), leaving collar 22 in contact with sensor 26 ; or which brake pedal 14 allows, depressing pedal 14 and moving collar 22 out of contact with sensor 26 (when there is a leak).
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
Description
- This is a continuation-in-part of U.S. application Ser. No. 09/248,474, filed Feb. 11, 1999.
- This invention relates generally to an apparatus for leakage testing fluid systems, and more particularly to an arrangement and method for testing vehicle hydraulic brake systems.
- When servicing vehicles in the field, it is very important to give the customer quick and thorough service. Quicker service is desirable for several reasons, such as that it tends to result in less expense for the service, as well as being more convenient for the customer.
- In certain instances, however, quick service can be more difficult, such as when servicing a brake issue. Knowing how important brakes are to the performance of the vehicle, inspections can be very time consuming in the effort to guarantee that the brakes are in peak operating condition. Of course, many brake component inspections are straightforward and can be performed quickly by the technician, such as a pad thickness check, a disc thickness inspection, etc. However, confirming that a system has no brake fluid leaks can be very time consuming. Some parts of the vehicle must be disassembled and other parts are difficult to see and reach. Even when the brake components are easily accessible, it still takes time to check the numerous pipe, hose, and banjo fitting connections.
- It is seen, therefore, that it would be desirable to have a device for easily detecting fluid leaks. Besides being a time saving device at the service end, such a tool could also be useful at the manufacturing facility for quality checks.
- Therefore, among the purposes of this invention is the provision of brake leak detection capable of testing the condition of brake fluid loss.
- Also a purpose of this invention is the capability of providing an accurate and straightforward leakage determination which can be easily and reliably installed.
- These purposes are achieved by the brake leak detection system and method according to the present invention, wherein the condition of the brake fluid lines can be determined before a vehicle leaves the manufacturing facility.
- In accordance with one embodiment of the present invention, a vehicle brake leakage testing system can be easily mounted in association with and removed from the vehicle brake pedal. The brake leakage testing system comprises a brake leak detector assembly having at least a brake contact, a spring means, an output means, and a reference end, typically opposite the brake contact.
- The primary advantage provided by the present invention is to detect vehicle brake fluid leaks. Even an infinitesimal fluid loss can be detected at the factory, rather than after delivery to a customer. Furthermore, the brake leak detector is easy to install and can accurately determine if any brake fluid leaks are present on a vehicle in a matter of minutes.
- Other objects and advantages of the invention will be apparent from the following description, the accompanying drawings and the appended claims, to which reference may be had for a full understanding of the nature of the present invention.
- In the Drawings:
- FIG. 1 is a side view illustrating the vehicle brake leakage testing system in accordance with the present invention;
- FIG. 2 illustrates the vehicle brake leakage testing system of FIG. 1 in operation;
- FIG. 3 is a block diagram of the brake leak detector circuit for controlling the vehicle brake leakage testing system of FIGS. 1 and 2, and providing vehicle brake leakage indication; and
- FIGS. 4A and 4B show a table of test data results and the graphical representation of fluid leaks, respectively.
- In accordance with the present invention, a vehicle brake leakage testing system can be easily mounted in association with and removed from the vehicle brake pedal. The brake leakage testing system comprises a brake leak detector assembly having at least a brake contact, a sensor, a force applying means, an output means, and a reference end, typically opposite the brake contact.
- When the brake contact is in contact with the vehicle brake pedal, the reference end is located at any tangible reference location, such as in contact with the steering wheel of the vehicle. The brake pedal of the vehicle is depressed so as to securely wedge the brake leak detector assembly between the brake pedal and the tangible reference location, and encourage the spring means to apply the necessary force for pressurizing the brake fluid. The sensor is used to detect any leaks in the brake fluid line and the output means then indicates whether any leaks are detected in the brake fluid line. The device of the present invention is used when the vehicle is not running. There is electrical power to power the device as the vehicle is in an auxiliary mode.
- Referring to the drawings, FIG. 1 illustrates a brake
leak detector assembly 10, in accordance with the present invention. In FIG. 1, abrake contact 12, comprises a foot/brake pedal bracket. Thebrake contact 12 is positioned so as to wedge theassembly 10 between the brake pedal 14 (at thebrake contact 12 end) and a reference location (such as steering wheel 16) atreference end 18, as illustrated in FIG. 2. - Initially, a
set screw 20 associated with a slidingcollar 22 is loosened. The operator then sits in the driver's seat of the stationary vehicle and confirms that the steering wheel is straight and in the correct tilt position, before starting the vehicle. The brake leakdetector pedal plate 12 is placed between thebrake pedal 14 and theoperators foot 24. The operator then confirms that thereference end 18 is properly positioned and the slidingcollar 22 is correctly oriented. The engine is then turned off and the vehicle is placed in an auxiliary mode to provide electrical power to theassembly 10. In a preferred embodiment of the present invention, the correct orientation for the slidingcollar 22 requires the sliding collar to make contact withsensor 26, associated withcircuit box 28, illustrated in more detail in FIG. 3. - To correctly locate the
reference end 18, in a preferred embodiment of the invention, the operator depresses thebrake pedal 14 while pushing downward, into the brake pedal, on theassembly 10, facilitated by force application means, such assprings Chain 46 and associatedswivel location 48 can be used to hold the device together when the unit is not installed. This securely positions theassembly 10 between thepedal 14 and the steering wheel 16 (or other reference location). As stated, the slidingcollar 22 should abutcircuit box 28, as sensed bysensor 26 and indicated bycontact indicator 30. - To measure a leak in the brake system, the system is initialized. The
set screw 20 is adjusted so thatspring 42displaces sliding collar 22 againstsensor 26, thereby activating thesensor 26. With setscrew 20 loosened,brake pedal 12 can be depressed and locked to thereference end 18 andsteering wheel 16. This establishes a relative position. At this point, thespring 42 has set or defined thecollar 22 againstsensor 26, SO thatcollar 22 is in contact withsensor 26 and setscrew 20 is tightened. Nowspring 44 exerts a pressure to pushrod 45 associated withbrake pedal 12, maintaining the tension to push and keeppedal 12 down. - Continuing with FIG. 1, if there is a brake fluid leak, the pressure on
rod 45 to depresspedal 12 moves thecollar 22 away from contact withsensor 26. An associated computer or means such ascircuit box 28 for outputting the brake fluid leak detection results reads this result as a brake fluid leak. If there is a brake fluid leak, thepedal 12 will depress, and this relative motion of the brake pedal is detected by thesensor 26 which loses contact with thecollar 22. If there is no brake fluid leak,rod 45 andbrake pedal 12 will not move, andcollar 22 will maintain contact withsensor 26. The output computer reads this result as no brake fluid leaks. - The brake leak detector of the present invention was utilized on a 1999 Honda Civic Si. The vehicle was raised in the air and supported on jack stands, and all four wheels were removed. The following steps were then performed on each of the four wheels. First, a two inch hose on the left front caliper bleed screw was installed. The bleed screw was opened to fill the hose with fluid. The vehicle was then started, the brake leak detector of the present invention was properly installed, and the engine shut off and the vehicle placed in an auxiliary mode. The steering wheel was then lowered to its lowest tilt position, and the brake leak detector power cord was plugged into the 12 volt outlet of the vehicle. The sliding collar was positioned up on the shaft, as discussed above in reference to FIG. 1, thereby activating the
sensor 26 and turning the test system on. A wrench was then placed on the left front bleed screw and slowly opened, releasing measured amounts of fluid, as indicated in the table of FIG. 4A. The number of drops released from the end of the hose before detection of the leak by the brake leak detector were counted. After detection of the leak, the bleed screw was closed. Once the vehicle was started, each of the subsequent steps was performed ten times, on each wheel, and recorded each time for the ten trials of each wheel indicated in FIG. 4A. - From the test data of ten trials shown in FIG. 4A, with the accompanying graphical representation of the test data shown in FIG. 4B, it is possible to detect amounts as low as 0.2 cc of fluid leak with the device of the present invention. On no brake is a more than 0.5 cc leak necessary before detection on average. In the table of FIG. 4A, the amount of fluid that drained from each of the left front, right front, left rear, and right rear wheels is shown in drops and cc's before detection. The leakage occurring before detection is shown for each of the four wheels, in ten trials in the table of FIG. 4A. From the test data, it appears that the closer the leak is to the master cylinder, the better the detection.
- In FIG. 4B, the left front wheel is indicated as60, the right front wheel is indicated as 62, the left rear wheel is indicated as 64 and the right rear wheel is indicated as 66. The results of the test trials shows that detection of brake fluid leakage is detected in an amount as low as 0.2 cc, and not greater than 0.5 cc on average. The result of the testing proves that the brake leak detector will indicate if a vehicle leaks between 0 to 3 drops of brake fluid (0 to 1.0 cc) out of the system.
-
Circuit box 28 houses brake leak detector circuitry which is used to produce an indication of “pass” or “fail” for brake fluid in a vehicle. In the embodiment illustrated in FIGS. 1 and 2, anoutput light 32 is green to indicate an acceptable brake fluid system, and red to indicate an unacceptable brake fluid system, i.e., a fluid leak. An audible signal, such asbuzzer 34, can also be incorporated to give additional indication of failure mode. - Referring now to FIG. 3, it will be obvious to those skilled in the art that the objective of the circuitry, to produce an indication of pass or fail for brake fluid, can be accomplished by a variety of suitable means and methods, such as, for example, an oscillator system. When the test is initiated, the circuit of
box 28, as detailed in circuit block diagram 50 specifies that timing means 52, such as an oscillator, runs for a period of 1 minute and 5 seconds, at a minimum. This slow 1 minute pulse train goes intologic block 54, which comprises a serial to parallel converter having two functions. First, the converter is used as a counter until 5 pulse trains pass, which approximately represents 5 minutes and 30 seconds. This also signifies the end of the test when the vehicle passes (i.e., when no brake fluid leak is detected), outputting the result atblock 56, typically in the form of a green output light 32 orbuzzer 34. Secondly, using a serial-to-parallel converter also gives five outputs, shown as fivetiming lights 10, representing each minute of time. - When a failure is detected, this is indicated by suitable means, such as a blocking transistor for blocking the timing clock pulse. This stops the timer and ensures the failed output stays activated. Since these five
light outputs 36 can change incorrectly when failure occurs, a D-FF can be inserted as a timing light memory to help buffer switch spikes produced at the blocking transistor for the serial-to-parallel converter. This helps to prevent premature activation of the subsequent light, inlight series 36, when a failure occurs. - In this embodiment, the
logic 58 of thecircuit 50 uses two external inputs and one internal input. The two external inputs to logic are theleak detection sensor 26 andtoggle switch 40, as seen in FIG. 3. The internal input is the output of the serial-to-parallel converter after the 5 minute interval. This goes through a series of AND and INVERTER gates inblock 54 to stop thetimer 52 and keep the timing lights activated when failure occurs. The opposite is also true when a pass occurs, that is, a transistor ofblock 54 can be activated to block thedetector switch 62 in case a detected failure happens after the 5 minutes is complete. The visual reference of the test duration is indicated atblock 58. - Once
assembly 10 is securely and properly positioned between thebrake pedal 14 and thesteering wheel 16, the vehicle is shut off, the ignition turned to accessory, and the steering wheel locked into the proper tilt position. Thedetector assembly 10 is plugged into the vehicle's 12-volt power outlet, using connection means 38. At this point, the slidingcollar 22 is allowed to touchsensor 26, with the contact confirmed bycontact indicator 30. Theset screw 20 should now be tightened, to maintain the sliding collar in the desired position. - To initiate testing of the brake fluid condition, “test start”
switch 40 is engaged, at which point the first of the series oflights 36 should turn on. If no leaks are detected, thesecond light 36 will come on after approximately 2 to 2½ minutes; the third light 36 will come on after approximately 3 to 3½ minutes; thefourth light 36 will come on after approximately 4 to 4½ minutes; thefifth light 36 will come on after approximately 5 to 5½ minutes; and theoutput light 32 will be green. Conversely, if a leak is detected, even a leak as seemingly insignificant as a single drop of fluid,audible indicator 34 will sound,output light 32 will be red, thelights 36 will stop illuminating, andcontact indicator 30 will be off. In this manner, brake fluid condition for a vehicle can be quickly and accurately tested for. - Hence,
spring 42 operates oncollar 22 when theset screw 20 is loose, positioning the face ofcollar 22 againstsensor 26. Whencollar 22 is locked into position,spring 42 is inoperable. Then,spring 44 acts onrod element 45 against thebrake pedal 14, whichbrake pedal 14 resists (when there is no leak), leavingcollar 22 in contact withsensor 26; or whichbrake pedal 14 allows, depressingpedal 14 and movingcollar 22 out of contact with sensor 26 (when there is a leak). - Having described the invention in detail and by reference to the preferred embodiment thereof, it will be apparent that other modifications and variations are possible without departing from the scope of the invention defined in the appended claims.
Claims (13)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/767,309 US6363774B2 (en) | 1999-02-11 | 2001-01-23 | Method and apparatus for brake leak detection |
PCT/US2002/001344 WO2002073149A1 (en) | 2001-01-23 | 2002-01-18 | Method and apparatus for brake leak detection |
CA002404357A CA2404357C (en) | 2001-01-23 | 2002-01-18 | Method and apparatus for brake leak detection |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US24847499A | 1999-02-11 | 1999-02-11 | |
US09/767,309 US6363774B2 (en) | 1999-02-11 | 2001-01-23 | Method and apparatus for brake leak detection |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US24847499A Continuation-In-Part | 1999-02-11 | 1999-02-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20020017129A1 true US20020017129A1 (en) | 2002-02-14 |
US6363774B2 US6363774B2 (en) | 2002-04-02 |
Family
ID=25079095
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/767,309 Expired - Fee Related US6363774B2 (en) | 1999-02-11 | 2001-01-23 | Method and apparatus for brake leak detection |
Country Status (3)
Country | Link |
---|---|
US (1) | US6363774B2 (en) |
CA (1) | CA2404357C (en) |
WO (1) | WO2002073149A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050199091A1 (en) * | 2004-03-12 | 2005-09-15 | The Boeing Company | Brake pedal positioning apparatus and method |
US20210291800A1 (en) * | 2018-07-19 | 2021-09-23 | Robert Bosch Gmbh | Method for testing the leak tightness of a hydraulic vehicle braking system |
WO2022050741A1 (en) * | 2020-09-02 | 2022-03-10 | 주식회사 만도 | Device for sensing liquid flowing into housing of electronic control device |
US11565683B2 (en) * | 2020-12-30 | 2023-01-31 | Peaceful Thriving Enterprise Co., Ltd. | Quick-detachable brake fluid test structure |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060101818A1 (en) * | 2004-06-16 | 2006-05-18 | Black Richard D | Bleed tec |
US20100237875A1 (en) * | 2009-03-18 | 2010-09-23 | Dominador Limcolioc | Unified brake and light tester |
DE102011079881A1 (en) * | 2010-10-13 | 2012-04-19 | Continental Teves Ag & Co. Ohg | Pedal support for clamping a brake pedal and method for checking the tightness of one or more components of a hydraulic brake system |
US9103737B2 (en) * | 2013-03-08 | 2015-08-11 | Honda Motor Co., Ltd. | Vehicle brake system testing device and method |
DE102014008039A1 (en) * | 2014-05-28 | 2015-12-03 | Dürr Somac GmbH | Method for testing braking systems of motor vehicles |
US20190061725A1 (en) * | 2017-08-31 | 2019-02-28 | Nissan North America, Inc. | Parking Brake Cable Stretch Assist Tool |
US11745718B2 (en) * | 2020-04-10 | 2023-09-05 | Moc Products Company, Inc. | Vehicle pedal actuator with control unit |
KR102369311B1 (en) * | 2020-10-13 | 2022-03-03 | (주)오토노머스에이투지 | Braking robot device for vehicle braking test |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3031884A (en) * | 1956-07-02 | 1962-05-01 | Bendix Corp | Leak test equipment |
DE2623912A1 (en) * | 1976-05-28 | 1977-12-15 | Teves Gmbh Alfred | TEST PROCEDURE FOR DETERMINING FAULTS IN A HYDRAULIC BRAKE SYSTEM AND FOR PERFORMING THE PROCEDURE OF APPROPRIATE TRAINING TANK |
US4307604A (en) * | 1978-09-08 | 1981-12-29 | Dominion Tool & Die Company, Inc. | Brake testing device |
US4527804A (en) * | 1983-07-19 | 1985-07-09 | Telspec Limited | Sealing of electrical cable joints, equipment housings, or the like |
US5131268A (en) * | 1990-07-06 | 1992-07-21 | General Electric Company | Brake assembly including torque monitor |
US5181440A (en) * | 1991-12-27 | 1993-01-26 | Jagt Clarence D | Tool for measuring the travel of a vehicle brake rod |
DE19503451C1 (en) * | 1995-02-03 | 1996-05-15 | Daimler Benz Ag | Method for checking the braking system of a vehicle |
SE512266C2 (en) * | 1997-07-09 | 2000-02-21 | Gambro Med Tech Ab | Method and Device for Integrity Testing of a Hose Kit Intended for Use in a Peritoneal Dialysis Cycler |
WO1999022215A1 (en) * | 1997-10-29 | 1999-05-06 | Stant Manufacturing Inc. | Hand-held fuel cap leakage tester |
US6105422A (en) * | 1998-07-13 | 2000-08-22 | Pollock; Paul | Brake tester and method of using same |
US6094977A (en) * | 1998-09-23 | 2000-08-01 | New York Air Brake Corporation | Brake cylinder leakage test method and device |
-
2001
- 2001-01-23 US US09/767,309 patent/US6363774B2/en not_active Expired - Fee Related
-
2002
- 2002-01-18 WO PCT/US2002/001344 patent/WO2002073149A1/en not_active Application Discontinuation
- 2002-01-18 CA CA002404357A patent/CA2404357C/en not_active Expired - Fee Related
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050199091A1 (en) * | 2004-03-12 | 2005-09-15 | The Boeing Company | Brake pedal positioning apparatus and method |
US7313951B2 (en) * | 2004-03-12 | 2008-01-01 | The Boeing Company | Brake pedal positioning apparatus and method |
US20210291800A1 (en) * | 2018-07-19 | 2021-09-23 | Robert Bosch Gmbh | Method for testing the leak tightness of a hydraulic vehicle braking system |
US12084021B2 (en) * | 2018-07-19 | 2024-09-10 | Robert Bosch Gmbg | Method for testing the leak tightness of a hydraulic vehicle braking system |
WO2022050741A1 (en) * | 2020-09-02 | 2022-03-10 | 주식회사 만도 | Device for sensing liquid flowing into housing of electronic control device |
US11565683B2 (en) * | 2020-12-30 | 2023-01-31 | Peaceful Thriving Enterprise Co., Ltd. | Quick-detachable brake fluid test structure |
Also Published As
Publication number | Publication date |
---|---|
US6363774B2 (en) | 2002-04-02 |
WO2002073149A1 (en) | 2002-09-19 |
CA2404357C (en) | 2008-02-12 |
CA2404357A1 (en) | 2002-09-19 |
WO2002073149A9 (en) | 2003-01-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6363774B2 (en) | Method and apparatus for brake leak detection | |
CA1298719C (en) | Brake testing system for motor vehicles | |
KR101474688B1 (en) | Automatic in and out apparatus of Multi Concent | |
JPH09216557A (en) | Inspection method and device of vehicular brake device | |
JPH09216556A (en) | Inspection method and device of vehicle brake device | |
JP2008511496A (en) | Method for operating a brake device for a vehicle | |
US4307604A (en) | Brake testing device | |
JP3725471B2 (en) | Method for functionally testing a vehicle dynamics control sensor system | |
KR102040472B1 (en) | Inspection method and inspection device for leakage of vacuum degree of a vehicle booster | |
JPH09207763A (en) | Method and device for inspecting vehicle brake device | |
US4553212A (en) | Leakage inspection device for brake hoses | |
US5005405A (en) | Method of testing an anti-lock brake control system of a motor vehicle | |
EP1722142B1 (en) | Diagnosis system for the operation of an electro-valve embarked on board of a motor vehicle | |
US8532840B2 (en) | Method for diagnosing brake pedal contactors | |
WO2000047971A1 (en) | Method and apparatus for brake leak detection | |
US20180257629A1 (en) | System and method for detecting stuck valves | |
JP2961887B2 (en) | Inspection method for braking force of vehicle equipped with anti-lock control device | |
JP2000231410A (en) | Method and device for monitoring controller of vehicle | |
KR19990010502A (en) | Defective state detection device of clutch cylinder | |
JPH04173464A (en) | Brake inspecting method | |
KR100188777B1 (en) | Clutchmaster cylinder tester | |
KR100274824B1 (en) | Tire pressure warning device | |
EP1636078B1 (en) | Valve diagnostic tool | |
KR100224415B1 (en) | Testing system and testing method for master cylinder of clutch in a car | |
JP2961886B2 (en) | Inspection method for braking force of vehicle equipped with anti-lock control device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HONDA OF AMERICA, MFG., INC., OHIO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DUFF, DOUGLAS J.;REEL/FRAME:011637/0671 Effective date: 20010126 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
AS | Assignment |
Owner name: HONDA GIKEN KOGYO KABUSHIKI KAISHA, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HONDA OF AMERICA MFG., INC.;REEL/FRAME:014313/0920 Effective date: 20030123 |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20140402 |