CN112758068A - Brake master cylinder - Google Patents
Brake master cylinder Download PDFInfo
- Publication number
- CN112758068A CN112758068A CN202110005076.3A CN202110005076A CN112758068A CN 112758068 A CN112758068 A CN 112758068A CN 202110005076 A CN202110005076 A CN 202110005076A CN 112758068 A CN112758068 A CN 112758068A
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- Prior art keywords
- master cylinder
- brake master
- brake
- spring
- piston
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Classifications
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- 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
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
- B60T11/16—Master control, e.g. master cylinders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
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- 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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
- B60T13/46—Vacuum systems
- B60T13/52—Vacuum systems indirect, i.e. vacuum booster units
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Braking Systems And Boosters (AREA)
Abstract
The invention discloses a brake master cylinder, which comprises a vacuum booster and a brake master cylinder connected with the vacuum booster; the vacuum booster is provided with an output force ejector rod, a boosting push rod and a vacuum cavity; the brake master cylinder further comprises a spring seat and a spring part, wherein the spring seat is sleeved on the piston of the brake master cylinder, the spring seat is fixedly connected with the output force ejector rod, the spring part is clamped between the spring seat and the cylinder body of the brake master cylinder, the piston of the brake master cylinder is located in the vacuum cavity of the vacuum booster and located on the moving path of the output force ejector rod, and a gap is formed between the piston of the brake master cylinder and the output force ejector rod of the vacuum booster. The invention also discloses an automobile braking energy recovery system, which can fully utilize the feedback torque of the engine, support high braking energy recovery and improve the cruising ability of the automobile. Belongs to the technical field of engines.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a brake master cylinder.
Background
The electric automobile has short endurance mileage, heavy battery and high cost, and the pain points seriously affect the popularization of the electric automobile. The consumption and energy consumption of the electric vehicle running in urban areas are high, and the recovery of braking energy is an important energy-saving measure for the electric vehicle. Compared with the traditional fuel vehicle, the electric vehicle is additionally provided with parts such as a battery, a motor and the like, when the vehicle decelerates, the motor is in a power generation state to brake the vehicle, and the braking energy is recovered to a rechargeable energy storage system (such as a battery) or used for vehicle-mounted accessories to work. When braking is carried out, the braking friction torque and the motor feedback torque are superposed and act on wheels to decelerate the vehicle, and as the invalid clearance of the traditional hydraulic braking circuit is smaller, in order to ensure the driving comfort of a driver (the target braking deceleration is close to the actual deceleration), the motor feedback torque is set to be smaller and generally needs to be less than 0.1G, and the contribution rate of braking energy recovery to the endurance mileage is only about 10%.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention aims to: the invention provides a brake master cylinder, which can fully utilize the feedback torque of an engine, support high brake energy recovery and improve the cruising ability of an automobile.
In order to achieve the purpose, the invention adopts the following technical scheme:
a brake master cylinder comprises a vacuum booster and a brake master cylinder connected with the vacuum booster; the vacuum booster is provided with an output force ejector rod, a boosting push rod and a vacuum cavity; the brake master cylinder further comprises a spring seat and a spring part, the spring seat is fixedly connected with the output force ejector rod, the spring part is clamped between the spring seat and a cylinder body of the brake master cylinder, the piston of the brake master cylinder is located in a vacuum cavity of the vacuum booster and located on a moving path of the output force ejector rod, and a gap is formed between the piston of the brake master cylinder and the output force ejector rod of the vacuum booster.
Further, the spring element comprises a rubber cylinder sleeved on the piston of the brake master cylinder and a columnar spring sleeved on the rubber cylinder; one end of the rubber cylinder and one end of the columnar spring are both fixed on the cylinder body of the brake main cylinder, and the other end of the rubber cylinder and the other end of the columnar spring are both fixedly connected with the spring seat.
Further, the cylindrical spring is embedded in the rubber cylinder.
Furthermore, the piston of the brake master cylinder is positioned in a vacuum cavity of the vacuum booster, a groove is formed in the piston of the brake master cylinder, and an output force ejector rod of the vacuum booster extends into the groove and has a gap with the inner wall of the groove.
Furthermore, a first rod hole is formed in the spring seat, and the output force ejector rod penetrates through the first rod hole and is fixedly connected with the sliding block.
Further, the groove is provided with a top end provided with a notch and a bottom wall located in the extending direction of the output force ejector rod, and the bottom wall of the groove is spherical.
Furthermore, a hemisphere is arranged at the tail end of the output force ejector rod, and the diameter of the hemisphere is equal to that of the bottom wall of the groove.
An automobile braking energy recovery system comprises the braking main cylinder, a braking pedal connected with a boosting push rod, a hydraulic unit connected with the braking main cylinder, wheels connected with the hydraulic unit, a storage battery, a motor electrically connected with the storage battery and a speed reducer connected with the output end of the motor; the output end of the speed reducer is connected with the wheels.
Furthermore, the automobile braking energy recovery system also comprises a motor controller, a master controller in signal connection with the motor controller, and a reversible motor controller in signal connection with the master controller; the master controller is in signal connection with the hydraulic unit, and the storage battery is in signal connection with the master controller through the reversible motor controller.
Further, the automobile braking energy recovery system also comprises a displacement sensor arranged on a braking pedal; and the displacement sensor is in signal connection with the master controller.
Compared with the prior art, the invention has the following beneficial effects: when the output force ejector rod moving stroke of a vacuum booster is smaller than the decoupling clearance, the hydraulic braking system does not build pressure, namely when the braking deceleration is smaller than the set limit, the hydraulic braking system does not build hydraulic pressure, no hydraulic feedback force exists on a brake pedal, and the brake pedal force is completely simulated by the brake pedal feel simulator, so that the brake pedal feel comfort is ensured. The speed reduction of the wheels of the automobile braking energy recovery system is completed by the feedback torque of the motor, and the force of the brake pedal is completely simulated by the brake pedal sense simulator before the decoupling gap is eliminated. The hydraulic braking does not participate in the light braking of the brake main cylinder, the feedback torque of the engine can be fully utilized, the braking energy consumption is reduced, and the endurance contribution rate is improved. The automobile braking energy recovery system supports high braking energy recovery, generally can reach about 0.3G, and the endurance mileage contribution rate can be improved to about 20%.
Drawings
Fig. 1 is a schematic structural view of a master cylinder.
Fig. 2 is an enlarged view at a of fig. 1.
FIG. 3 is a schematic diagram of a braking energy recovery system of an automobile. A
Fig. 4 is a graph of brake pedal force sensing characteristics.
In the figure, 1 is a vacuum booster, 2 is a brake master cylinder, 3 is a spring seat, 4 is a spring part, 5 is a decoupling gap, 6 is a brake pedal, 7 is a hydraulic unit, 8 is a wheel, 9 is a storage battery, 10 is a motor, 11 is a speed reducer, 12 is a motor controller, 13 is a master controller, 14 is a reversible motor controller, and 15 is a displacement sensor;
1-1 is an output force ejector rod, 1-2 is an assistance push rod, 1-3 is a vacuum cavity, 1-4 is a hemisphere, 2-1 is a piston, 2-2 is a groove, 4-1 is a rubber cylinder, and 4-2 is a columnar spring.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; 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.
For convenience of description, unless otherwise noted, the up-down direction described below coincides with the up-down direction of fig. 1 itself, and the left-right direction described below coincides with the left-right direction of fig. 1 itself.
As shown in fig. 1 to 4, the present embodiment provides a brake master cylinder including a vacuum booster 1 and a brake master cylinder 2 connected to the vacuum booster 1. The vacuum booster 1 is provided with an output force ejector rod 1-1, a boosting push rod 1-2 and a vacuum cavity 1-3, wherein the output force ejector rod 1-1 is connected with a piston 2-1 of a brake main cylinder 2, the boosting push rod 1-2 is connected with a brake pedal 6 (the prior art), and the structure of the vacuum booster 1 can refer to a patent CN201720620926. X.
The brake master cylinder further comprises a spring seat 3 and a spring part 4 sleeved on a piston 2-1 of the brake master cylinder 2, and the brake pedal sense simulator is formed by the output force ejector rod 1-1, the spring seat 3 and the spring part 4 sleeved on the piston 2-1 of the brake master cylinder 2. The spring seat 3 is fixedly connected with the output force ejector rod 1-1, the spring part 4 is clamped between the spring seat 3 and a cylinder body of the brake main cylinder 2, the piston 2-1 of the brake main cylinder 2 is positioned in the vacuum cavity 1-3 of the vacuum booster 1 and on the moving path of the output force ejector rod 1-1, and a gap is formed between the piston 2-1 of the brake main cylinder 2 and the output force ejector rod 1-1 of the vacuum booster 1. When the boosting push rod 1-2 pushes the output force ejector rod 1-1 to approach to the piston 2-1 of the brake master cylinder 2, the spring seat 3 compresses the spring part 4, and a gap between the output force ejector rod 1-1 and the piston 2-1 of the brake master cylinder 2 is a decoupling gap 5. The damping of the brake pedal 6 simulator is set according to the force-brake deceleration curve requirements of the brake pedal 6. Fig. 4 shows a brake pedal 6 force-brake deceleration curve, when the brake deceleration is smaller than the set limit (0.3G), the hydraulic brake system does not build hydraulic pressure, and there is no hydraulic feedback force on the brake pedal 6, and the brake pedal 6 force at this time is completely simulated by the inventive brake pedal feel simulator (the pedal feel characteristic needs to be satisfied), so as to ensure the comfort of the brake pedal 6 feel. When the stroke of the boosting push rod 1-2 for pushing the output force ejector rod 1-1 is smaller than the decoupling gap 5, the hydraulic braking system of the automobile does not build pressure, the speed reduction of the wheels 8 is completed by the feedback torque of the motor 10, and the force of the brake pedal 6 is completely simulated by the brake pedal sense simulator before the decoupling gap 5 is eliminated. When the invention is lightly braked, the hydraulic brake of the automobile is not participated, the feedback torque of the engine can be fully utilized, the high brake energy recovery is completely realized by a mechanical structure, and the mechanical structure has higher reliability compared with an electrical structure.
Specifically, in one embodiment, the distance of the decoupling gap 5 is about 10mm, the value of the decoupling gap 5 is set by the maximum feedback torque of the motor 10 of the automobile, and the feedback torque of the motor 10 is slightly smaller than the maximum value (0.28G) before the decoupling gap 5 is eliminated. During braking, most of braking deceleration is less than 0.3G, and the decoupling gap 5 is arranged, so that most of braking deceleration is completely realized by the feedback torque of the motor 10, the braking energy consumption is reduced, and the endurance contribution rate is improved.
Specifically, in one embodiment, the spring member 4 includes a rubber cylinder 4-1 fitted over the piston 2-1 of the master cylinder 2 and a cylindrical spring 4-2 fitted over the rubber cylinder 4-1; one end of the rubber cylinder 4-1 and one end of the columnar spring 4-2 are both fixed on the cylinder body of the brake main cylinder 2, and the other end of the rubber cylinder 4-1 and the other end of the metal columnar spring 4-2 are both fixedly connected with the spring seat 3. The rubber tube 4-1 is a rubber spring which can be stretched and deformed when stressed, and the original shape can be recovered after the external force is removed. The rubber tube 4-1 and the cylindrical spring 4-2 form a composite rubber spring. The pure metal spring has high rigidity, high noise, poor spring force stability and poor 6-feeling of the brake pedal. The rigidity adjusting range of the composite rubber spring is large, the working noise is low, the stability of the spring force is good, and the comfortable operating force of the brake pedal 6 is ensured.
Specifically, in one embodiment, the rubber cylinder 4-1 and the cylindrical spring 4-2 are non-linearly designed. Because the stress of the brake pedal 6 is required to be increased nonlinearly, the nonlinear spring force of the compounded rubber spring can ensure good feeling of the brake pedal 6.
Specifically, in one embodiment, the cylindrical spring 4-2 is embedded within the rubber cylinder 4-1. The cylindrical spring 4-2 is embedded into the rubber tube 4-1 from the outer circumferential side surface of the rubber tube 4-1, so that the deformation of the cylindrical spring 4-2 and the deformation of the rubber tube 4-1 can be synchronous, and the sensitivity of the brake pedal feel simulator is ensured.
Specifically, in one embodiment, the depth of the cylindrical spring 4-2 radially embedded into the rubber tube 4-1 is 0.25-0.35 times the thickness of the rubber tube 4-1, which can ensure that the deformation of the cylindrical spring 4-2 and the rubber tube 4-1 can be synchronous, and the cylindrical spring 4-2 has a certain wrapping force on the rubber tube 4-1, so as to prevent the radial deformation of the rubber tube 4-1 and ensure the axial extension and contraction of the rubber tube 4-1.
Specifically, in one embodiment, the piston 2-1 of the master cylinder 2 is positioned in the vacuum cavity 1-3 of the vacuum booster 1, the piston 2-1 of the master cylinder 2 is provided with a groove 2-2, and the output force ejector rod 1-1 of the vacuum booster 1 extends into the groove 2-2 and has a gap with the inner wall of the groove 2-2. The piston 2-1 of the brake main cylinder 2 extends and retracts left and right in the horizontal direction, the output force ejector rod 1-1 is located on the right side of the piston 2-1 of the brake main cylinder 2 and moves left and right, the groove 2-2 is formed in the tail end (right end) of the piston 2-1 of the brake main cylinder 2, and the left end of the output force ejector rod 1-1 extends into the groove 2-2, so that the piston 2-1 of the brake main cylinder 2 is ensured to be in the moving direction of the output force ejector rod 1-1. A decoupling gap 5 exists between the bottom wall (left end) of the groove 2-2 and the left end of the output force ejector rod 1-1.
Specifically, in one embodiment, the spring seat 3 is provided with a first rod hole, and the output force ejector rod 1-1 penetrates through the first rod hole and is fixedly connected with the sliding block.
Specifically, in one embodiment, the groove 2-2 has a top end (right end) provided with a notch and a bottom wall (left end) in the extending direction of the output force ram 1-1, and the bottom wall of the groove 2-2 is spherical.
Specifically, in one embodiment, the tail end of the output force ejector rod 1-1 is provided with a hemisphere 1-4, and the diameter of the hemisphere 1-4 is equal to that of the bottom wall of the groove 2-2. The sphere center of the spherical surface is positioned on the axis of the piston 2-1 of the brake master cylinder 2, when the brake pedal 6 is treaded down with force, the output force ejector rod 1-1 can accurately push against the stress point (the center of the end surface of the piston 2-1) of the piston 2-1 of the brake master cylinder 2, so that the piston 2-1 of the brake master cylinder 2 can move rapidly along the axis direction, rapid braking is realized, and the sensitivity and the safety of braking are improved.
An automobile braking energy recovery system comprises the brake master cylinder, a brake pedal 6 connected with a boosting push rod 1-2, a hydraulic unit 7(ESC) connected with the brake master cylinder 2, wheels 8 connected with the hydraulic unit 7, a storage battery 9, a motor 10 electrically connected with the storage battery 9 and a speed reducer 11 connected with the output end of the motor 10; the output end of the reducer 11 is connected with the wheel 8. When low-intensity braking is carried out, the output force ejector rod 1-1 is not in contact with the piston 2-1 of the brake master cylinder 2, the pressure is not built in a loop (ESC) of the hydraulic unit 7, and the deceleration of the wheel 8 is completely realized by the feedback torque of the motor 10. The invention uses the feedback torque of the motor 10 to charge the battery to the utmost extent to realize the back-dragging braking, thereby improving the contribution rate of the endurance mileage. The invention has the advantages of small change amount of the traditional vacuum booster 1, low cost and simple structure.
Specifically, in one embodiment, the automobile braking energy recovery system further includes a motor controller 12, a general controller 13 in signal connection with the motor controller 12, and a reversible motor controller 14 in signal connection with the general controller 13; the main controller 13 is in signal connection with the hydraulic unit 7, and the storage battery 9 is in signal connection with the main controller 13 through the reversible motor controller 14.
Specifically, in one embodiment, the automobile braking energy recovery system further comprises a displacement sensor 15 mounted on the brake pedal 6; the displacement sensor 15 is in signal connection with the overall controller 13. A displacement sensor 15 is additionally arranged on the brake pedal 6 to detect the displacement of the brake pedal 6, and the feedback braking torque of the motor 10 is increased in proportion to the displacement. The proportional increasing relation of the feedback torque of the motor 10 ensures that the braking requirement is consistent with the braking requirement of a driver, and the controllability of the vehicle is ensured.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A brake master cylinder comprises a vacuum booster and a brake master cylinder connected with the vacuum booster; the vacuum booster is provided with an output force ejector rod, a boosting push rod and a vacuum cavity;
the method is characterized in that: still include spring holder and cover and establish spring part on the piston of brake master cylinder, the spring holder with output power ejector pin fixed connection, the spring part centre gripping is in the spring holder with between the cylinder body of brake master cylinder, the piston of brake master cylinder is located vacuum booster's vacuum chamber and lie in the removal route of output power ejector pin, the piston of brake master cylinder with be equipped with the clearance between the output power ejector pin of vacuum booster.
2. A brake master cylinder according to claim 1, wherein: the spring part comprises a rubber cylinder sleeved on the piston of the brake master cylinder and a columnar spring sleeved on the rubber cylinder; one end of the rubber cylinder and one end of the columnar spring are both fixed on the cylinder body of the brake main cylinder, and the other end of the rubber cylinder and the other end of the columnar spring are both fixedly connected with the spring seat.
3. A brake master cylinder according to claim 2, wherein: the cylindrical spring is embedded in the rubber cylinder.
4. A brake master cylinder according to claim 1, wherein: the piston of the brake master cylinder is positioned in a vacuum cavity of the vacuum booster, a groove is formed in the piston of the brake master cylinder, and an output force ejector rod of the vacuum booster extends into the groove and has a gap with the inner wall of the groove.
5. A brake master cylinder according to claim 4, wherein: and the spring seat is provided with a first rod hole, and the output force ejector rod penetrates through the first rod hole and is fixedly connected with the sliding block.
6. A brake master cylinder according to claim 5, wherein: the groove is provided with a top end provided with a notch and a bottom wall positioned in the extending direction of the output force ejector rod, and the bottom wall of the groove is a spherical surface.
7. A brake master cylinder according to claim 6, wherein: the tail end of the output force ejector rod is provided with a hemisphere, and the diameter of the hemisphere is equal to that of the bottom wall of the groove.
8. An automobile braking energy recovery system is characterized in that: the brake master cylinder comprises a brake master cylinder according to any one of claims 1-2, a brake pedal connected with the boosting push rod, a hydraulic unit connected with the brake master cylinder, wheels connected with the hydraulic unit, a storage battery, a motor electrically connected with the storage battery, and a speed reducer connected with an output end of the motor; the output end of the speed reducer is connected with the wheels.
9. The automotive braking energy recovery system of claim 8, wherein: the motor controller is connected with the motor controller through signals, and the reversible motor controller is connected with the master controller through signals; the master controller is in signal connection with the hydraulic unit, and the storage battery is in signal connection with the master controller through the reversible motor controller.
10. The automotive braking energy recovery system of claim 9, wherein: the brake device also comprises a displacement sensor arranged on the brake pedal; and the displacement sensor is in signal connection with the master controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110005076.3A CN112758068A (en) | 2021-01-04 | 2021-01-04 | Brake master cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110005076.3A CN112758068A (en) | 2021-01-04 | 2021-01-04 | Brake master cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112758068A true CN112758068A (en) | 2021-05-07 |
Family
ID=75699125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110005076.3A Withdrawn CN112758068A (en) | 2021-01-04 | 2021-01-04 | Brake master cylinder |
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| CN (1) | CN112758068A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4227371A (en) * | 1977-12-24 | 1980-10-14 | Nissin Kogyo Kabushiki Kaisha | Automotive brake booster device |
| US4522108A (en) * | 1980-09-12 | 1985-06-11 | Nissin Kogyo Kabushiki Kaisha | Vacuum booster device |
| CN2051316U (en) * | 1989-02-24 | 1990-01-17 | 吴万才 | Helical combined rubber spring |
| US20060214504A1 (en) * | 2005-03-22 | 2006-09-28 | Akihito Kusano | Brake apparatus for a vehicle |
| DE102006039475A1 (en) * | 2006-08-23 | 2008-03-27 | Lucas Automotive Gmbh | Braking force producing device for brake assembly i.e. hydraulic vehicle brake assembly, has pressure piston moved into pressure chamber to generate brake pressure relative to brake piston in emergency operation during fault in servo device |
| CN202279101U (en) * | 2011-09-06 | 2012-06-20 | 上海中科深江电动车辆有限公司 | Servo braking system for four-wheel drive electric automobile |
| CN207389183U (en) * | 2017-11-01 | 2018-05-22 | 拿森汽车科技南通有限公司 | A kind of Electric brake booster for automobile |
-
2021
- 2021-01-04 CN CN202110005076.3A patent/CN112758068A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4227371A (en) * | 1977-12-24 | 1980-10-14 | Nissin Kogyo Kabushiki Kaisha | Automotive brake booster device |
| US4522108A (en) * | 1980-09-12 | 1985-06-11 | Nissin Kogyo Kabushiki Kaisha | Vacuum booster device |
| CN2051316U (en) * | 1989-02-24 | 1990-01-17 | 吴万才 | Helical combined rubber spring |
| US20060214504A1 (en) * | 2005-03-22 | 2006-09-28 | Akihito Kusano | Brake apparatus for a vehicle |
| DE102006039475A1 (en) * | 2006-08-23 | 2008-03-27 | Lucas Automotive Gmbh | Braking force producing device for brake assembly i.e. hydraulic vehicle brake assembly, has pressure piston moved into pressure chamber to generate brake pressure relative to brake piston in emergency operation during fault in servo device |
| CN202279101U (en) * | 2011-09-06 | 2012-06-20 | 上海中科深江电动车辆有限公司 | Servo braking system for four-wheel drive electric automobile |
| CN207389183U (en) * | 2017-11-01 | 2018-05-22 | 拿森汽车科技南通有限公司 | A kind of Electric brake booster for automobile |
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Application publication date: 20210507 |