CA2542934A1 - High braking efficiency anti-lock brake system - Google Patents
High braking efficiency anti-lock brake system Download PDFInfo
- Publication number
- CA2542934A1 CA2542934A1 CA 2542934 CA2542934A CA2542934A1 CA 2542934 A1 CA2542934 A1 CA 2542934A1 CA 2542934 CA2542934 CA 2542934 CA 2542934 A CA2542934 A CA 2542934A CA 2542934 A1 CA2542934 A1 CA 2542934A1
- Authority
- CA
- Canada
- Prior art keywords
- wheel
- ecu
- vehicle
- deceleration
- acceleration
- 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.)
- Abandoned
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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
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/176—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS
- B60T8/1761—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS responsive to wheel or brake dynamics, e.g. wheel slip, wheel acceleration or rate of change of brake fluid pressure
- B60T8/17616—Microprocessor-based systems
-
- 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
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/175—Brake regulation specially adapted to prevent excessive wheel spin during vehicle acceleration, e.g. for traction control
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Regulating Braking Force (AREA)
Abstract
This invention pertains generally to braking system for the vehicle. The High Braking Efficiency Anti-Lock Brake System (HBE-ABS) is composed by wheel speed sensors(2), vehicle body acceleration sensors(1), brake pressure bleeding value(4), and Electronic Control Unit (3) ---ECU.
Its main feature is that the electronic control unit (3) monitors the body deceleration through the body acceleration sensors (1).
When the body deceleration value is not increased, the ECU (3) starts to send pulse to bleed the more brake pressure to decrease the slip to get maximum brake efficiency. The pulse width is decided by the difference between the wheel deceleration and body deceleration. The wider the pulse is, the more the pressure will be bled. The body acceleration sensors provide the acceleration for the X and Y axis to ECU (3) to maintain the same track as before, and prevent the wheel over spinning.
Its main feature is that the electronic control unit (3) monitors the body deceleration through the body acceleration sensors (1).
When the body deceleration value is not increased, the ECU (3) starts to send pulse to bleed the more brake pressure to decrease the slip to get maximum brake efficiency. The pulse width is decided by the difference between the wheel deceleration and body deceleration. The wider the pulse is, the more the pressure will be bled. The body acceleration sensors provide the acceleration for the X and Y axis to ECU (3) to maintain the same track as before, and prevent the wheel over spinning.
Description
Page 1 of 4 High Braking Efficiency Anti-Lock Brake System DESCRIPTION
Field of the invention Ref to figure one, the invention pertains generally to braking system for the vehicle. The High Braking Efficiency Anti-Lock Brake System (HBE-ABS) is composed by wheel speed sensors(2), vehicle body acceleration sensors(1), brake pressure bleeding value(4), and electronic control unit (ECU)(3).
Background information and prior art The current Anti-Lock Brake System (ABS) assumes that the maximum coefficient of the friction vs slip rate is the same for all kinds of the ground surface. The slip rate is defined as the distance difference between the vehicle body and the wheel to the distance of the body. All the current design is based on the assumption. But in reality, that is not true. Especially on ice or snow, ABS tends to increase braking distances. This invention is designed to solve the problem, and to maintain maximum braking efficiency.
Advantage and disadvantage Compared with the current system, this invention gives the vehicle high braking efficiency. It will decrease the braking distance on all kind of the ground surface. It also maintains the vehicle track and increases safety and saves lives.
Its disadvantage is the cost. Since vehicle body acceleration sensors(1) are used, it will cost more.
Application High Braking Efficiency Anti-Lock Brake System can be used on the vehicle such as the car, truck and bus for high braking efficiency.
Page 2 of 4 Detail Description Ref to figure one , the High Braking Efficiency Anti-Lock Brake System is composed by wheel speed sensors(2), vehicle body acceleration sensors(1), brake pressure bleeding control value(4), and electronic control unit (ECU) (3).
On the body of the vehicle, the body acceleration sensors(1) are installed to measure the acceleration of the body. For small vehicle, only one sensor is used, the equivalent acceleration on the body near the wheel is calculated based on the location of the center of gravity of the vehicle body, the location of the body sensor and the location of the wheels. For bigger vehicle, the acceleration for different section of body can be different, to increase the accuracy of the acceleration near the wheel, more acceleration body sensors are installed. They are installed on the vehicle body near the wheels.
The wheel speed sensors (2) are the same as the sensors used currently.
It outputs the pulse. Then the frequency represents the wheel speed. The wheel acceleration is calculated from the wheel speed by the electronic control unit (3).
The electronic control unit (3) will get the body acceleration value near the wheels and calculate the body equivalent acceleration from the body acceleration sensors(1). The calculation is based on the body acceleration sensor location, the wheel location and the location of the center of the gravity.
For the bigger vehicle body, the acceleration value for individual wheel is gotten directly from the individually section of the body sensor (1) which is located near the wheel. After the body acceleration at the location of the center of gravity needs to be calculated, it is regarded as equivalent acceleration. When the equivalent acceleration or the acceleration of the wheel reaches to threshold, the electronic control unit (3) records the body acceleration and wheel acceleration. By definition, when the acceleration value is negative, it is called as deceleration later. When the brake is locked, the slip is increased. The body deceleration value measured by the body acceleration sensors will go through increasing, going to peak and then decreasing. When the body deceleration reaches the peak or decreases, the Electronic Control Unit sends pulse to the bleeding control valve to bleed the more brake pressure. The wheel will speed up to decrease the slip rate.
According to the famous curve between brake efficiency and slip rate, the braking efficiency increases until reaching the peak efficiency.
The pulse width is depended on the deceleration difference between body sensors and the wheels sensors. The electronic control unit continues monitoring the body sensors and wheel sensors. The pulse width is modified Page 3 of 4 according to the difference between body sensor(1) value and wheel sensor(2) value. When the brake pressure continues decrease, the wheel speed up, the slip is decrease. According to the famous curve between brake efficiency and slip rate. The brake efficiency will increase and maintain the maximum efficiency. But there is some limitation of the bleeding, if brake pressure bleeds too much, the deceleration will start to decrease, so the ECU
will monitor the deceleration to start to decrease. If the deceleration decreased, the ECU stops the pulse to the bleeding value. There is other case, like the ice surface, the more slip rate, the more decelerations is.
According to the control scheme above, the bleeding value will not bleed the pressure. But the ECU will maintain the minimum wheel speed for steering by bleeding the pressure. There is one more case, if the driver releases the brake pedal or decreases to stop completely, the ECU continues monitor both body and wheel deceleration, if deceleration value is decreased, the ECU also stops sending pulse to quit bleeding pressure and prepare the next cycle.
The ABS brake bleeding controlling value(4) is controlled by the pulse width from ECU (3), if the pulse width increase, more pressure will be bleed.
The controlling value (4) is the same as the current used one.
From above, the braking efficiency reaches to the maximum regardless of the ground condition like pavement, ice, and snow surface.
The body acceleration sensor(1) is two-axis acceleration sensor. It provides two-axis acceleration for the X and Y axis. The ECU will equalize the brake pressure to the individual wheel to prevent the front or back wheel out of track, and to prevent the wheel over spinning.
The Electrical Controlling Unit(ECU) is composed by Digital Signal Processor controller, voltage converter and bleeding value current driver. The controller main function is filtering the noise for the body acceleration sensor, calculating the acceleration/deceleration of the body and wheel acceleration, and providing the pulse width to control the bleeding value.
Component assembly For small vehicle, one body sensor (1) is required at least; the sensor is installed in the ECU. The wheel sensors(2) are on the wheels. The wheels Page 4 of 4 sensors are connected with the ECU. The ECU is connected with the ABS
controlling value. The orientation of the ECU (3) is required to align with the vehicle.
For bigger vehicle, more body acceleration sensors (1) are required; the body acceleration sensors(1) are installed in the cable for the wheel sensors(2). The orientation for sensors(1) must be the same as the vehicle orientation.
Field of the invention Ref to figure one, the invention pertains generally to braking system for the vehicle. The High Braking Efficiency Anti-Lock Brake System (HBE-ABS) is composed by wheel speed sensors(2), vehicle body acceleration sensors(1), brake pressure bleeding value(4), and electronic control unit (ECU)(3).
Background information and prior art The current Anti-Lock Brake System (ABS) assumes that the maximum coefficient of the friction vs slip rate is the same for all kinds of the ground surface. The slip rate is defined as the distance difference between the vehicle body and the wheel to the distance of the body. All the current design is based on the assumption. But in reality, that is not true. Especially on ice or snow, ABS tends to increase braking distances. This invention is designed to solve the problem, and to maintain maximum braking efficiency.
Advantage and disadvantage Compared with the current system, this invention gives the vehicle high braking efficiency. It will decrease the braking distance on all kind of the ground surface. It also maintains the vehicle track and increases safety and saves lives.
Its disadvantage is the cost. Since vehicle body acceleration sensors(1) are used, it will cost more.
Application High Braking Efficiency Anti-Lock Brake System can be used on the vehicle such as the car, truck and bus for high braking efficiency.
Page 2 of 4 Detail Description Ref to figure one , the High Braking Efficiency Anti-Lock Brake System is composed by wheel speed sensors(2), vehicle body acceleration sensors(1), brake pressure bleeding control value(4), and electronic control unit (ECU) (3).
On the body of the vehicle, the body acceleration sensors(1) are installed to measure the acceleration of the body. For small vehicle, only one sensor is used, the equivalent acceleration on the body near the wheel is calculated based on the location of the center of gravity of the vehicle body, the location of the body sensor and the location of the wheels. For bigger vehicle, the acceleration for different section of body can be different, to increase the accuracy of the acceleration near the wheel, more acceleration body sensors are installed. They are installed on the vehicle body near the wheels.
The wheel speed sensors (2) are the same as the sensors used currently.
It outputs the pulse. Then the frequency represents the wheel speed. The wheel acceleration is calculated from the wheel speed by the electronic control unit (3).
The electronic control unit (3) will get the body acceleration value near the wheels and calculate the body equivalent acceleration from the body acceleration sensors(1). The calculation is based on the body acceleration sensor location, the wheel location and the location of the center of the gravity.
For the bigger vehicle body, the acceleration value for individual wheel is gotten directly from the individually section of the body sensor (1) which is located near the wheel. After the body acceleration at the location of the center of gravity needs to be calculated, it is regarded as equivalent acceleration. When the equivalent acceleration or the acceleration of the wheel reaches to threshold, the electronic control unit (3) records the body acceleration and wheel acceleration. By definition, when the acceleration value is negative, it is called as deceleration later. When the brake is locked, the slip is increased. The body deceleration value measured by the body acceleration sensors will go through increasing, going to peak and then decreasing. When the body deceleration reaches the peak or decreases, the Electronic Control Unit sends pulse to the bleeding control valve to bleed the more brake pressure. The wheel will speed up to decrease the slip rate.
According to the famous curve between brake efficiency and slip rate, the braking efficiency increases until reaching the peak efficiency.
The pulse width is depended on the deceleration difference between body sensors and the wheels sensors. The electronic control unit continues monitoring the body sensors and wheel sensors. The pulse width is modified Page 3 of 4 according to the difference between body sensor(1) value and wheel sensor(2) value. When the brake pressure continues decrease, the wheel speed up, the slip is decrease. According to the famous curve between brake efficiency and slip rate. The brake efficiency will increase and maintain the maximum efficiency. But there is some limitation of the bleeding, if brake pressure bleeds too much, the deceleration will start to decrease, so the ECU
will monitor the deceleration to start to decrease. If the deceleration decreased, the ECU stops the pulse to the bleeding value. There is other case, like the ice surface, the more slip rate, the more decelerations is.
According to the control scheme above, the bleeding value will not bleed the pressure. But the ECU will maintain the minimum wheel speed for steering by bleeding the pressure. There is one more case, if the driver releases the brake pedal or decreases to stop completely, the ECU continues monitor both body and wheel deceleration, if deceleration value is decreased, the ECU also stops sending pulse to quit bleeding pressure and prepare the next cycle.
The ABS brake bleeding controlling value(4) is controlled by the pulse width from ECU (3), if the pulse width increase, more pressure will be bleed.
The controlling value (4) is the same as the current used one.
From above, the braking efficiency reaches to the maximum regardless of the ground condition like pavement, ice, and snow surface.
The body acceleration sensor(1) is two-axis acceleration sensor. It provides two-axis acceleration for the X and Y axis. The ECU will equalize the brake pressure to the individual wheel to prevent the front or back wheel out of track, and to prevent the wheel over spinning.
The Electrical Controlling Unit(ECU) is composed by Digital Signal Processor controller, voltage converter and bleeding value current driver. The controller main function is filtering the noise for the body acceleration sensor, calculating the acceleration/deceleration of the body and wheel acceleration, and providing the pulse width to control the bleeding value.
Component assembly For small vehicle, one body sensor (1) is required at least; the sensor is installed in the ECU. The wheel sensors(2) are on the wheels. The wheels Page 4 of 4 sensors are connected with the ECU. The ECU is connected with the ABS
controlling value. The orientation of the ECU (3) is required to align with the vehicle.
For bigger vehicle, more body acceleration sensors (1) are required; the body acceleration sensors(1) are installed in the cable for the wheel sensors(2). The orientation for sensors(1) must be the same as the vehicle orientation.
Claims (5)
1. The invention pertains generally to braking system for the vehicle. The High Braking Efficiency Anti-Lock Brake System (HBE-ABS) is composed by wheel speed sensors(2), vehicle body acceleration sensors(1), brake pressure bleeding value(4), and Electronic Control Unit (ECU)(3). By definition, when the acceleration value is negative, it is called as deceleration. Its main feature is that the ECU(3) monitors the body and wheel deceleration through wheel speed sensors (2), and vehicle body acceleration sensors(1). When the vehicle body or wheel deceleration value increases at the threshold, and then if the body deceleration value reaches peak or decreases, the ECU starts to send pulse to bleed the more brake pressure to decrease the slip to get maximum brake efficiency. After bleeding the brake pressure, if the body deceleration decreases, ECU (3) stops sending pulse to quit bleeding the brake pressure.
2. The body acceleration sensors (1) provide the acceleration for the X and Y axis to ECU to maintain its track, and prevent the wheel over spinning.
3. The pulse width is decided by the difference between the wheel deceleration and body deceleration. The wider the pulse is, the more the pressure will be bled.
4. For a small vehicle, if one acceleration sensor (1) is used per vehicle, the body accelerations near every wheel (5) are calculated by the wheel location, acceleration sensor location, and center of gravity of the vehicle. For big vehicle, the body acceleration sensors are installed near the wheel (5).
5. The signal from the body acceleration sensor(1) is filtered by the digital signal processing controller on ECU (3) to get ride of the vibration noise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2542934 CA2542934A1 (en) | 2006-04-03 | 2006-04-03 | High braking efficiency anti-lock brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2542934 CA2542934A1 (en) | 2006-04-03 | 2006-04-03 | High braking efficiency anti-lock brake system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2542934A1 true CA2542934A1 (en) | 2007-10-03 |
Family
ID=38561301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2542934 Abandoned CA2542934A1 (en) | 2006-04-03 | 2006-04-03 | High braking efficiency anti-lock brake system |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2542934A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202011002392U1 (en) | 2011-02-04 | 2011-05-05 | Teppert, Peter | Sudoku board game |
| DE202011002681U1 (en) | 2011-02-13 | 2011-05-12 | Teppert, Peter | Sudoku number puzzle |
| CN111559362A (en) * | 2020-05-12 | 2020-08-21 | 格陆博科技有限公司 | EPB-based anti-lock system and anti-lock method thereof |
| CN112660086A (en) * | 2020-12-08 | 2021-04-16 | 太原工业学院 | Electro-hydraulic brake-by-wire system |
-
2006
- 2006-04-03 CA CA 2542934 patent/CA2542934A1/en not_active Abandoned
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202011002392U1 (en) | 2011-02-04 | 2011-05-05 | Teppert, Peter | Sudoku board game |
| DE202011002681U1 (en) | 2011-02-13 | 2011-05-12 | Teppert, Peter | Sudoku number puzzle |
| CN111559362A (en) * | 2020-05-12 | 2020-08-21 | 格陆博科技有限公司 | EPB-based anti-lock system and anti-lock method thereof |
| CN112660086A (en) * | 2020-12-08 | 2021-04-16 | 太原工业学院 | Electro-hydraulic brake-by-wire system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |