CN113085997A - Electric booster of vehicle and vehicle - Google Patents
Electric booster of vehicle and vehicle Download PDFInfo
- Publication number
- CN113085997A CN113085997A CN202110455806.XA CN202110455806A CN113085997A CN 113085997 A CN113085997 A CN 113085997A CN 202110455806 A CN202110455806 A CN 202110455806A CN 113085997 A CN113085997 A CN 113085997A
- Authority
- CN
- China
- Prior art keywords
- piston
- cavity
- cylinder
- chamber
- electric booster
- 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.)
- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
Abstract
The invention provides an electric booster of a vehicle and the vehicle, the electric booster of the vehicle includes: an oil storage device; the pedal input hydraulic cylinder comprises a first cylinder body and a first piston, the first cylinder body and the first piston jointly define a first cavity, the first cavity is selectively communicated with the oil storage device, and the brake pedal is suitable for driving the first piston to move so as to change the volume of the first cavity; the pedal reaction force simulation device is suitable for providing reaction force for a brake pedal, a buffer cavity with variable volume is defined in the pedal reaction force simulation device, and the first cavity is selectively communicated with the buffer cavity; a second cavity is defined in the brake hydraulic cylinder, the second cavity is selectively communicated with the first cavity, and the second cavity is communicated with a brake of a vehicle. From this, through the electric booster of this application, when the helping hand became invalid, can avoid leading to exporting the lower condition of hydraulic pressure to take place because of footboard reaction force analogue means's reaction force to can promote electric booster's use reliability and application range.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to an electric booster of a vehicle and a vehicle with the electric booster of the vehicle.
Background
In the related art, a stroke simulator of an electric booster of a vehicle mostly adopts a spring structure, and two springs are generally connected in series, so that a driver can obtain a proper pedal feeling when stepping on a pedal.
However, when the boosting force is lost, the output hydraulic pressure is low due to the counterforce of the stroke simulator spring, and if the mass of the whole vehicle is large, the deceleration of the whole vehicle can not reach 2.44m/s when the driver gives the input pedal force2(when the regulation requires that the boosting is failed, the deceleration of the whole vehicle is not less than 2.44m/s when the input pedal force is given2) And thus cannot meet the assistance failure requirements of the laws and regulations.
Disclosure of Invention
In view of the above, the present invention is directed to an electric booster for a vehicle, which can prevent a situation where an output hydraulic pressure is low due to a reaction force of a pedal reaction force simulator, and thus can improve reliability and a range of use of the electric booster.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an electric booster for a vehicle includes: an oil storage device; a pedal input cylinder including a first cylinder and a first piston that together define a first chamber that is selectively in communication with the oil reservoir, the first piston being connected to a brake pedal of the vehicle that is adapted to drive the first piston in motion to vary the volume of the first chamber; the pedal reaction force simulation device is suitable for providing reaction force for the brake pedal, a buffer cavity with variable volume is limited in the pedal reaction force simulation device, and the first cavity is selectively communicated with the buffer cavity; and a second cavity is defined in the brake hydraulic cylinder, the second cavity is selectively communicated with the first cavity, and the second cavity is communicated with a brake of the vehicle.
In some examples of the present invention, a first oil path is connected between the first cavity and the buffer cavity, and a normally-off solenoid valve is disposed on the first oil path.
In some examples of the invention, the brake cylinder includes: second cylinder body and second piston, the second cylinder body with the second piston is injectd jointly the second cavity, be equipped with the third piston in the second cavity, the third piston will first sub-cavity and second sub-cavity are separated into to the second cavity, first sub-cavity selectively with the oil storage device intercommunication, the second sub-cavity selectively with first cavity intercommunication.
In some examples of the invention, the second sub-cavity is communicated with the first cavity through a second oil path, and a normally-on electromagnetic valve is arranged on the second oil path.
In some examples of the present disclosure, the second sub-chamber is formed between the third piston and the second piston, the first sub-chamber is formed between the third piston and the second cylinder, the first elastic member is supported between the third piston and the second piston, and the second elastic member is supported between the third piston and the second cylinder.
In some examples of the invention, the side wall of the second cylinder is provided with a first liquid inlet penetrating through the side wall of the second cylinder, the second cylinder is internally provided with a first sealing element and a second sealing element which are arranged at intervals in the axial direction of the second cylinder, and the first liquid inlet is positioned between the first sealing element and the second sealing element; the first sealing element and the second sealing element are clamped between the second cylinder body and the third piston, and a second liquid inlet suitable for being communicated with the first liquid inlet is formed in the third piston; a third liquid inlet penetrating through the side wall of the first cylinder body is formed in the side wall of the first cylinder body, a fourth sealing piece and a fifth sealing piece are arranged in the first cylinder body at intervals in the axial direction of the first cylinder body, and the third liquid inlet is located between the fourth sealing piece and the fifth sealing piece; the fourth sealing element and the fifth sealing element are both clamped between the first cylinder body and the first piston, and a fourth liquid inlet which is suitable for being communicated with the third liquid inlet is formed in the first piston.
In some examples of the present invention, the pedal reaction force simulation apparatus includes: the fourth piston is slidably arranged in the simulator cylinder body to divide the simulator cylinder body into the buffer cavity and the installation cavity; and a third elastic part is arranged in the mounting cavity and supported between the fourth piston and the simulator cylinder.
In some examples of the invention, a third seal is sandwiched between the simulator cylinder and the fourth piston; the inner surface of the peripheral wall of the simulator cylinder body is provided with a boss, the boss is provided with an installation groove, and the third sealing element is arranged in the installation groove.
In some examples of the present invention, the second cylinder is provided with a flow passage that communicates with the first cavity through a second oil passage.
Compared with the prior art, the electric booster of the vehicle has the following advantages: according to the electric booster of the vehicle, when the boosting fails, the situation that the output hydraulic pressure is low due to the reaction force of the pedal reaction force simulation device can be avoided, and therefore the use reliability and the use range of the electric booster can be improved.
Another object of the invention is to propose a vehicle.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a vehicle comprises the electric booster of the vehicle.
The vehicle and the electric booster of the vehicle have the same advantages compared with the prior art, and are not described in detail herein.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a sectional view of an electric booster according to an embodiment of the present invention.
Description of reference numerals:
an electric booster 100; an electric booster 1;
an oil storage device 10; a third oil passage 11;
a pedal input cylinder 20; a first cylinder 21; a first piston 22; a first cavity 23; a pedal input lever 24; the first oil passage 25; a normally-off solenoid valve 26; a third inlet 27; a fourth seal 28; a fifth seal 29; a fourth loading port 30; the fourth elastic member 31; second oil passage 32;
a brake cylinder 40; a second cavity 41; the second cylinder 42; a second piston 43; a third piston 44; a first sub-cavity 45; a second sub-cavity 46; the first elastic member 47; a second elastic member 48; a normally-on electromagnetic valve 49; a first inlet port 50; a first seal member 51; a second seal 52; a second liquid inlet 53; the first connection portion 54; the second connection portion 55; an installation space 56; a flow passage 57; a sixth seal 58; a seventh seal 59;
a pedal reaction force simulator 70; a buffer chamber 71; a simulator cylinder 72; a fourth piston 73; a mounting cavity 74; the third elastic member 75; a third seal 76; a boss 77; and a mounting groove 78.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, an electric booster 100 for a vehicle according to an embodiment of the present invention includes: the hydraulic brake system includes an oil reservoir 10, a pedal input cylinder 20, a pedal reaction force simulator 70, and a brake cylinder 40.
The pedal input cylinder 20 comprises a first cylinder 21 and a first piston 22, the first cylinder 21 and the first piston 22 together defining a first chamber 23, the first chamber 23 being selectively in communication with the oil reservoir 10, the first piston 22 being connected to a brake pedal of the vehicle, the brake pedal being adapted to drive the first piston 22 in movement to vary the volume of the first chamber 23.
It should be noted that at least part of the structure of the first piston 22 is disposed in the first cylinder 21, the first cavity 23 may be defined by the first cylinder 21 and the first piston 22, the first cavity 23 may be selectively communicated with the oil storage device 10, a brake pedal of the vehicle is connected to the first piston 22, the brake pedal can drive the first piston 22 to move, and the volume of the first cavity 23 can be changed when the first piston 22 moves.
The pedal reaction force simulator 70 is adapted to provide a reaction force to the brake pedal, a variable volume cushion chamber 71 is defined in the pedal reaction force simulator 70, the first chamber 23 is in selective communication with the cushion chamber 71, the brake cylinder 40 is defined therein a second chamber 41, the second chamber 41 is in selective communication with the first chamber 23, and the second chamber 41 is in communication with the brake of the vehicle.
It should be noted that a cushion chamber 71 is provided in the pedal reaction force simulator 70, the cushion chamber 71 can be selectively communicated with the first chamber 23, the pedal reaction force simulator 70 can provide reaction force for the brake pedal, the second chamber 41 can be defined by the brake cylinder 40, the second chamber 41 can be selectively communicated with the first chamber 23, and the second chamber 41 can be communicated with the brake of the vehicle.
In the left-right direction shown in fig. 1, a brake pedal may be connected to a right end of the first piston 22, optionally, a pedal input rod 24 may be connected to a right end of the first piston 22, the first piston 22 may be connected to the brake pedal through the pedal input rod 24, when a driver steps on the brake pedal, the brake pedal may drive the pedal input rod 24 to move in the left direction in fig. 1, when the pedal input rod 24 moves to the left, the first piston 22 may be driven to move to the left, when the first piston 22 moves to the left, the volume of the first cavity 23 may be changed, and specifically, when the first piston 22 moves to the left, the volume of the first cavity 23 may be reduced.
Furthermore, the electric booster 100 further includes an electric booster 1, and when the electric booster 1 is normally operated, the first cavity 23 is communicated with the buffer cavity 71, the second cavity 41 is disconnected from the first cavity 23, when the electric booster 1 fails, the first chamber 23 is disconnected from the buffer chamber 71, the second chamber 41 is communicated with the first chamber 23, and, in addition, when the driver does not step on the brake pedal, the first cavity 23 is communicated with the oil storage device 10, and when the driver steps on the brake pedal to move the first piston 22 towards the first cavity 23 for a certain distance (i.e. when the first piston 22 moves leftwards for a certain distance in the left-right direction shown in fig. 1), the first cavity 23 is disconnected from the oil storage device 10, or it can be understood that when the vehicle is not braked, the first cavity 23 is communicated with the oil storage device 10, and when the vehicle is braked, the first cavity 23 is disconnected from the oil storage device 10.
Specifically, when the electric power assist device 1 is normally operated, as the stroke of the brake pedal increases (the stroke of the brake pedal can be increased by the driver by stepping on the brake pedal), the stroke of the first piston 22 moving toward the first cavity 23 also increases, when the stroke of the first piston 22 moving toward the first cavity 23 reaches a certain distance, the first cavity 23 is disconnected from the oil reservoir 10, when the first piston 22 continues to move toward the first cavity 23, the volume of the first cavity 23 decreases, and as the volume of the first cavity 23 decreases, the hydraulic pressure of the hydraulic oil (brake fluid) in the first cavity 23 increases, at this time, since the first cavity 23 is communicated with the buffer cavity 71, the hydraulic oil (brake fluid) in the first cavity 23 can flow to the buffer cavity 71 of the pedal reaction force simulation device 70, and the pedal reaction force simulation device 70 can provide a reaction force for the brake pedal, the driver has the resistance of trampling when stepping on brake pedal, can make the driver feel trampling the sense to make the driver have comfortable driving experience.
And, the electric power assist device 1 can collect the stroke of the brake pedal to change the volume of the second cavity 41 according to the stroke of the brake pedal, specifically, as the stroke of the brake pedal increases, the electric power assist device 1 can change the volume of the second cavity 41 to reduce the volume of the second cavity 41, and as the volume of the second cavity 41 is smaller, the hydraulic pressure of the hydraulic oil (brake fluid) in the second cavity 41 increases, at this time, as the second cavity 41 is communicated with the brake of the vehicle, the hydraulic oil (brake fluid) in the second cavity 41 can flow to the brake of the vehicle to realize the braking of the vehicle.
Or, the electric booster 1 can collect the stroke of the first piston 22 to change the volume of the second cavity 41 according to the stroke of the first piston 22, and specifically, as the stroke of the first piston 22 increases, the electric booster 1 can change the volume of the second cavity 41 to reduce the volume of the second cavity 41, and as the volume of the second cavity 41 decreases, the hydraulic pressure of the hydraulic oil (brake fluid) in the second cavity 41 increases, at this time, since the second cavity 41 is communicated with the brake of the vehicle, the hydraulic oil (brake fluid) in the second cavity 41 can flow to the brake of the vehicle to realize the braking of the vehicle.
When the electric power assist device 1 fails, as the stroke of the brake pedal increases, the stroke of the first piston 22 moving toward the first cavity 23 also increases, and when the stroke of the first piston 22 moving toward the first cavity 23 reaches a certain distance, the first cavity 23 is disconnected from the oil storage device 10, and then, as the first piston 22 continues to move toward the first cavity 23, the volume of the first cavity 23 decreases, and as the volume of the first cavity 23 decreases, the hydraulic pressure of the hydraulic oil (brake fluid) in the first cavity 23 increases. At this time, since the second chamber 41 is communicated with the first chamber 23, the hydraulic oil (brake fluid) in the first chamber 23 can flow to the second chamber 41 of the brake cylinder 40, and as the hydraulic oil (brake fluid) in the second chamber 41 increases, the hydraulic pressure of the hydraulic oil (brake fluid) in the second chamber 41 increases, and since the second chamber 41 is communicated with the brake of the vehicle, the hydraulic oil (brake fluid) in the second chamber 41 can flow to the brake of the vehicle to realize the braking of the vehicle.
Because when electric booster 100 breaks down (when helping hand became invalid promptly), first cavity 23 and cushion chamber 71 disconnection, consequently, footboard reaction force analogue means 70 can not provide the reaction for the brake pedal to can avoid leading to exporting the lower condition of hydraulic pressure to take place because of the reaction force of footboard reaction force analogue means 70, can make the vehicle have higher deceleration, and then can make electric booster 100's reliable use, in addition, when the driver tramples the footboard, the driver can not have the sensation of "bouncing feet", thereby can make the driver have comfortable driving experience.
Therefore, with the electric booster 100 of the present application, when the boosting fails, the situation that the output hydraulic pressure is low due to the reaction force of the pedal reaction force simulator 70 can be avoided, and the use reliability and the use range of the electric booster 100 can be improved.
In some embodiments of the present invention, as shown in fig. 1, a first oil path 25 may be connected between the first cavity 23 and the buffer cavity 71, and a normally-off solenoid valve 26 may be disposed on the first oil path 25, it should be noted that one end of the first oil path 25 may be communicated with the first cavity 23, and the other end of the first oil path 25 may be communicated with the buffer cavity 71, that is, the first cavity 23 may be communicated with the buffer cavity 71 through the first oil path 25, hydraulic oil (brake fluid) in the first cavity 23 may flow into the buffer cavity 71 through the first oil path 25, and hydraulic oil (brake fluid) in the buffer cavity 71 may also flow into the first cavity 23 through the first oil path 25.
The normally-off solenoid valve 26 may be disposed on the first oil path 25, and the normally-off solenoid valve 26 may control whether the first oil path 25 is conducted or not, or the normally-off solenoid valve 26 may control the first oil path 25 to be conducted, and when the normally-off solenoid valve 26 controls the first oil path 25 to be conducted, the first cavity 23 may be communicated with the buffer cavity 71, and the normally-off solenoid valve 26 may control the first oil path 25 to be disconnected, and when the normally-off solenoid valve 26 controls the first oil path 25 to be disconnected, the first cavity 23 may be disconnected from the buffer cavity 71.
When the normally-off solenoid valve 26 is not energized (de-energized), the normally-off solenoid valve 26 controls the first oil passage 25 to be disconnected so as to disconnect the first cavity 23 from the buffer chamber 71, and when the normally-off solenoid valve 26 is energized, the normally-off solenoid valve 26 controls the first oil passage 25 to be connected so as to connect the first cavity 23 to the buffer chamber 71.
Optionally, when the electric power assisting device 1 normally works, the normally-off solenoid valve 26 is powered on, when the electric power assisting device 1 fails, the normally-off solenoid valve 26 is powered off, so that the driver does not feel a "springfoot" when stepping on the brake pedal, and thus the driver can have comfortable driving experience, and when the electric power assisting device 1 fails, the first cavity 23 and the buffer cavity 71 can be disconnected, so that a situation that the output hydraulic pressure is low due to the reaction force of the pedal reaction force simulator 70 can be avoided, and further the vehicle can have high deceleration, and in addition, by providing the normally-off solenoid valve 26 on the first oil path 25, whether the first oil path 25 is conducted or not can be rapidly controlled, and thus the working reliability of the electric power assisting device 100 can be ensured.
In some embodiments of the present invention, as shown in fig. 1, the brake cylinder 40 may include: the second cylinder 42 and the second piston 43, the second cylinder 42 and the second piston 43 may jointly define a second chamber 41, a third piston 44 may be disposed in the second chamber 41, the third piston 44 may divide the second chamber 41 into a first sub-chamber 45 and a second sub-chamber 46, the first sub-chamber 45 may be selectively communicated with the oil storage device 10, and the second sub-chamber 46 may be selectively communicated with the first chamber 23. It should be noted that at least a portion of the second piston 43 may be disposed within the second cylinder 42, and the second chamber 41 may be defined by the second cylinder 42 and the second piston 43.
Alternatively, in the left-right direction shown in fig. 1, the left end of the second piston 43 may be disposed in the second cylinder 42, and the right end of the second piston 43 may be connected with the electric booster 1, and the electric booster 1 may be used to push the second piston 43 toward the third piston 44 (i.e., the electric booster 1 may be used to push the second piston 43 toward the left side shown in fig. 1).
And, the third piston 44 may be disposed in the second chamber 41, the third piston 44 may divide the second chamber 41 into a first sub-chamber 45 and a second sub-chamber 46, the first sub-chamber 45 may be selectively communicated with the oil storage device 10, and the first sub-chamber 23 may be selectively communicated with the second sub-chamber 46.
Specifically, the third piston 44 may move in a direction away from the second piston 43 (i.e. the third piston 44 may move towards the left side as viewed in fig. 1), and when the stroke of the movement of the third piston 44 towards the left side as viewed in fig. 1 reaches a certain distance, the first sub-chamber 45 is disconnected from the oil storage device 10, or it may be understood that when the vehicle is not braking, the first sub-chamber 45 is connected to the oil storage device 10, and when the vehicle is braking, the first sub-chamber 45 is disconnected from the oil storage device 10. In addition, when the electric power assist device 1 works normally, the second sub-chamber 46 is disconnected from the first chamber 23, and when the electric power assist device 1 fails, the second sub-chamber 46 is connected to the first chamber 23.
Further, when the electric power assist device 1 is operating normally, the electric power assist device 1 can control the stroke of pushing the second piston 43 to move toward the third piston 44 (i.e., control the stroke of pushing the second piston 43 to move toward the left side shown in fig. 1) according to the stroke of the brake pedal, when the second piston 43 moves toward the third piston 44, the pressure of the hydraulic oil (brake fluid) in the second sub-chamber 46 increases, and thus the third piston 44 moves toward the left side shown in fig. 1, and when the third piston 44 moves toward the left side shown in fig. 1, the first sub-chamber 45 is disconnected from the oil storage device 10, and the pressure of the hydraulic oil (brake fluid) in the first sub-chamber 45 increases.
As an embodiment of the present invention, the first sub-chamber 45 and the second sub-chamber 46 may be in communication with a brake of a vehicle, and the first sub-chamber 45 may be in communication with a brake of a front wheel of the vehicle, and the second sub-chamber 46 may be in communication with a brake of a rear wheel of the vehicle, so that when the pressure of hydraulic oil (brake fluid) in the first sub-chamber 45 and the second sub-chamber 46 is increased, the hydraulic oil (brake fluid) in the first sub-chamber 45 may flow to the brake of the front wheel of the vehicle, and the hydraulic oil (brake fluid) in the second sub-chamber 46 may flow to the brake of the rear wheel of the vehicle, thereby reliably achieving braking of the vehicle.
Further, in the left-right direction shown in fig. 1, the electric booster 1 may be disposed at the right side of the second piston 43, the electric booster 1 has a limit function, and the electric booster 1 may stop the second piston 43 to prevent the second piston 43 from moving out of the second cylinder 42 to the right.
When the electric power assisting device 1 breaks down, the second sub-cavity 46 is communicated with the first cavity 23, along with the increase of the hydraulic pressure of the hydraulic oil (brake fluid) in the first cavity 23, the hydraulic oil (brake fluid) in the first cavity 23 can flow to the second sub-cavity 46, along with the increase of the hydraulic oil (brake fluid) in the second sub-cavity 46, the hydraulic pressure of the hydraulic oil (brake fluid) in the second sub-cavity 46 can be increased, so that the third piston 44 can be pushed to move towards the left side shown in fig. 1 to increase the pressure of the hydraulic oil (brake fluid) in the first sub-cavity 45, and the braking of the vehicle can be realized. With this arrangement, when the electric power assist device 1 fails, the pedal force required to be applied by the driver can be reduced, so that the vehicle can have a higher deceleration, and the vehicle can meet the requirements of the regulations.
In some embodiments of the present invention, as shown in fig. 1, the second sub-cavity 46 may be communicated with the first cavity 23 through the second oil path 32, and the second oil path 32 may be provided with a normally open solenoid valve 49, it should be noted that one end of the second oil path 32 may be connected with the first cavity 23, the other end of the second oil path 32 may be connected with the second sub-cavity 46, the hydraulic oil (brake fluid) in the first cavity 23 may flow into the second sub-cavity 46 through the second oil path 32, and the hydraulic oil (brake fluid) in the second sub-cavity 46 may also flow into the first cavity 23 through the first oil path 25.
The second oil passage 32 may be provided with a normally-on solenoid valve 49, and the normally-on solenoid valve 49 may control the on/off of the second oil passage 32, or it may be understood that the normally-on solenoid valve 49 may control the on of the second oil passage 32, when the normally-on solenoid valve 49 controls the on of the first oil passage 25, the first cavity 23 may communicate with the second sub-cavity 46, the normally-on solenoid valve 49 may also control the off of the second oil passage 32, and when the normally-on solenoid valve 49 controls the off of the second oil passage 32, the first cavity 23 may disconnect from the second sub-cavity 46.
When the normally-on solenoid valve 49 is de-energized, the normally-on solenoid valve 49 controls the second oil passage 32 to be communicated to communicate the first chamber 23 with the second sub-chamber 46, and when the normally-on solenoid valve 49 is energized, the normally-on solenoid valve 49 controls the first oil passage 25 to be disconnected to disconnect the first chamber 23 from the second sub-chamber 46.
Alternatively, when the electric booster 1 is normally operated, the normally-on solenoid valve 49 is energized, and when the electric booster 1 is out of order, the normally-on solenoid valve 49 is de-energized, so that whether the second oil passage 32 is communicated or not can be rapidly controlled, and the operational reliability of the electric booster 100 can be further ensured.
In some embodiments of the present invention, as shown in fig. 1, a second sub-chamber 46 may be formed between the third piston 44 and the second piston 43, a first sub-chamber 45 may be formed between the third piston 44 and the second cylinder 42, a first elastic member 47 may be supported between the third piston 44 and the second piston 43, and a second elastic member 48 may be supported between the third piston 44 and the second cylinder 42. It should be noted that the second sub-chamber 46 may be located between the third piston 44 and the second piston 43, that is, the second sub-chamber 46 may be defined by the second cylinder 42, the third piston 44 and the second piston 43, the first sub-chamber 45 may be defined by the third piston 44 and the second cylinder 42, and the first sub-chamber 45 may be located on the left side of the second sub-chamber 46 in the left-right direction shown in fig. 1.
The first elastic member 47 may be disposed between the third piston 44 and the second piston 43, specifically, one end of the first elastic member 47 may be connected to one end of the third piston 44, the other end of the first elastic member 47 may be connected to the second piston 43, one end of the second elastic member 48 may be connected to the other end of the third piston 44, and the other end of the second elastic member 48 may be connected to the bottom wall of the second cylinder 42, when the second piston 43 moves toward the third piston 44, the first elastic member 47 may be compressed, when the third piston 44 moves away from the second piston 43, the second elastic member 48 may be compressed, when the electric power assist device 1 fails, the driver may obtain a proper pedal feeling when the driver steps on the brake pedal, so that the driving experience of the driver may be further improved.
As some embodiments of the present invention, as shown in fig. 1, a third oil path 11 may be connected between the first chamber 23 and the oil storage device 10, one end of the third oil path 11 may be connected to the oil storage device 10, the other end of the third oil path 11 may be connected to the first chamber 23, hydraulic oil (brake fluid) in the first chamber 23 may flow into the oil storage device 10 through the third oil path 11, hydraulic oil (brake fluid) in the oil storage device 10 may also flow into the first chamber 23 through the third oil path 11, preferably, in the up-down, left-right direction shown in fig. 1, the upper end of the first chamber 23 may be communicated with the third oil path 11, and the left lower end of the first chamber 23 may be communicated with the first oil path 25 and the second oil path 32, so that hydraulic oil (brake fluid) may smoothly flow between the first chamber 23 and the oil storage device 10, and the first chamber 23 may be communicated with the first oil path 25, the second oil path 25, the first oil path 25, and the second oil path, The connection position of the second oil passage 32 and the third oil passage 11 is reasonable.
In some embodiments of the present invention, as shown in fig. 1, a side wall of the second cylinder 42 may be provided with a first inlet port 50 penetrating through the side wall of the second cylinder 42, the second cylinder 42 may be provided therein with a first sealing member 51 and a second sealing member 52 arranged at an interval in an axial direction of the second cylinder 42, the first inlet port 50 may be located between the first sealing member 51 and the second sealing member 52 in the axial direction of the second cylinder 42, both the first sealing member 51 and the second sealing member 52 may be interposed between the second cylinder 42 and the third piston 44, and the third piston 44 may be provided with a second inlet port 53 adapted to communicate with the first inlet port 50.
It should be noted that the side wall of the second cylinder 42 may be provided with a first inlet port 50, the first inlet port 50 may extend through the side wall of the second cylinder 42, the first inlet port 50 may be communicated with the oil storage device 10, the second cylinder 42 may be provided with a first sealing member 51 and a second sealing member 52, the first sealing member 51 and the second sealing member 52 may be spaced apart from each other in an axial direction (i.e., a left-right direction shown in fig. 1) of the second cylinder 42, the first sealing member 51 and the second sealing member 52 may be disposed between the second cylinder 42 and the third piston 44, the first inlet port 50 may be located between the first sealing member 51 and the second sealing member 52, the third piston 44 may be provided with a second inlet port 53, and the second inlet port 53 may be selectively communicated with the first inlet port 50.
Alternatively, in the left-right direction shown in fig. 1, the first seal 51 may be provided on the left side of the first intake port 50, and the second seal 52 may be provided on the right side of the first intake port 50.
Further, when the vehicle is not braked, the second liquid inlet 53 on the third piston 44 is communicated with the first liquid inlet 50, at this time, the first sub-cavity 45 is communicated with the oil storage device 10, when the stroke of the third piston 44 moving towards the left side shown in fig. 1 reaches a certain distance, the second liquid inlet 53 is blocked by the first sealing element 51, or the second liquid inlet 53 moves to the left side of the first sealing element 51, at this time, the second liquid inlet 53 is not communicated with the first liquid inlet 50, that is, the first sub-cavity 45 is not communicated with the oil storage device 10, so that the gap flow of hydraulic oil (brake fluid) between the third piston 44 and the second cavity 41 can be avoided, the electric booster 100 can be reliably used, and the failure of the electric booster 100 can be avoided.
In some embodiments of the present invention, as shown in fig. 1, a side wall of the first cylinder 21 may be provided with a third liquid inlet 27 penetrating through the side wall of the first cylinder 21, a fourth sealing member 28 and a fifth sealing member 29 disposed at an interval in an axial direction of the first cylinder 21 may be disposed in the first cylinder 21, and in the axial direction of the first cylinder 21, the third liquid inlet 27 may be located between the fourth sealing member 28 and the fifth sealing member 29, each of the fourth sealing member 28 and the fifth sealing member 29 may be interposed between the first cylinder 21 and the first piston 22, and the first piston 22 may be provided with a fourth liquid inlet 30 adapted to communicate with the third liquid inlet 27.
It should be noted that the side wall of the first cylinder 21 may be provided with a third liquid inlet 27, the third liquid inlet 27 may extend through the side wall of the first cylinder 21, the third liquid inlet 27 may be communicated with the oil storage device 10, alternatively, the third liquid inlet 27 may be communicated with the oil storage device 10 through a third oil path 11, a fourth sealing member 28 and a fifth sealing member 29 may be provided in the first cylinder 21, each of the fourth sealing member 28 and the fifth sealing member 29 may be provided as a sealing ring, the fourth sealing member 28 and the fifth sealing member 29 may be provided at intervals in the axial direction of the first cylinder 21 (i.e., the left-right direction shown in fig. 1), each of the fourth sealing member 28 and the fifth sealing member 29 may be provided between the first cylinder 21 and the first piston 22, and the third liquid inlet 27 may be located between the fourth sealing member 28 and the fifth sealing member 29, the first piston 22 may be provided with a fourth liquid inlet 30, the fourth inlet port 30 may selectively communicate with the third inlet port 27.
Optionally, in the left-right direction shown in fig. 1, the fourth sealing element 28 may be disposed on the left side of the third liquid inlet 27, the fifth sealing element 29 may be disposed on the right side of the third liquid inlet 27, and one end of the third oil path 11 connected to the first cavity 23 may extend into the third liquid inlet 27, so that the third oil path 11 may be connected to the first cavity 23, and therefore the assembling difficulty of the electric booster 100 may be reduced, and the assembling efficiency of the electric booster 100 may be improved.
Further, when the vehicle is not braked, the fourth liquid inlet 30 on the first piston 22 is communicated with the third liquid inlet 27, at this time, the first cavity 23 is communicated with the oil storage device 10, when the stroke of the first piston 22 moving towards the left side shown in fig. 1 reaches a certain distance, the fourth liquid inlet 30 can be blocked by the fourth sealing element 28, or the fourth liquid inlet 30 moves to the left side of the fourth sealing element 28, at this time, the fourth liquid inlet 30 is not communicated with the third liquid inlet 27, that is, the first cavity 23 is not communicated with the oil storage device 10, and by the arrangement, the gap flow of hydraulic oil (brake fluid) between the first piston 22 and the first cavity 23 can be avoided, so that the use of the electric booster 100 can be more reliable, and the failure of the electric booster 100 can be further avoided.
As some embodiments of the present invention, as shown in fig. 1, a sixth sealing member 58 and a seventh sealing member 59 which are arranged at intervals in the axial direction of the second cylinder 42 may be further arranged in the second cylinder 42, each of the sixth sealing member 58 and the seventh sealing member 59 may be arranged as a sealing ring, and each of the sixth sealing member 58 and the seventh sealing member 59 may be interposed between the second cylinder 42 and the second piston 43, so that the hydraulic oil (brake fluid) in the second sub-cavity 46 may be prevented from flowing in a gap between the second cylinder 42 and the second piston 43, and thus the use of the electric booster 100 may be more reliable, and the failure of the electric booster 100 may be further prevented.
As some embodiments of the present invention, as shown in fig. 1, the upper end of the brake cylinder 40 may be provided with a first connection portion 54 and a second connection portion 55, the first connection portion 54 and the second connection portion 55 may each define an installation space 56, and a part of the structure of the oil reservoir 10 may be disposed in the installation space 56 to be connected to the brake cylinder 40, so that the oil reservoir 10 may be securely disposed on the brake cylinder 40, and the structure of the electric booster 100 may be made compact, so that the space required to be occupied by the electric booster 100 may be reduced, and further, it may be convenient to arrange other components on the vehicle.
Further, first connecting portion 54 may define a mounting groove, first inlet 50 runs through the diapire of mounting groove, the mounting groove may communicate with first inlet 50, oil storage device 10 may communicate with first inlet 50 through the mounting groove, set up like this and may not need to set up extra connection oil circuit and communicate oil storage device 10 with first sub-cavity 45 to the oil circuit design that can make electric booster 100 is simple.
In some embodiments of the present invention, as shown in fig. 1, the pedal reaction force simulator 70 may include: a simulator cylinder 72 and a fourth piston 73, the fourth piston 73 being slidably disposed in the simulator cylinder 72 to divide the interior of the simulator cylinder 72 into a cushion chamber 71 and a mounting chamber 74, a third elastic member 75 may be disposed in the mounting chamber 74, the third elastic member 75 may be a spring, and the third elastic member 75 may be supported between the fourth piston 73 and the simulator cylinder 72.
It should be noted that the fourth piston 73 may be disposed in the simulator cylinder 72, the fourth piston 73 may be slidable in the left-right direction shown in fig. 1 with respect to the simulator cylinder 72, the fourth piston 73 may partition the simulator cylinder 72 into the buffer chamber 71 and the mounting chamber 74, that is, the left end of the fourth piston 73 and the simulator cylinder 72 may jointly define the buffer chamber 71, the right end of the fourth piston 73 and the simulator cylinder 72 may jointly define the mounting chamber 74, the third elastic member 75 may be disposed in the mounting chamber 74, hydraulic oil (brake fluid) may not be disposed in the mounting chamber 74, the left end of the third elastic member 75 may be connected to the right end of the fourth piston 73, and the right end of the third elastic member 75 may be connected to the bottom wall of the simulator cylinder 72.
Specifically, when the electric power assist device 1 normally operates, the normally-off solenoid valve 26 is energized, when the normally-off solenoid valve 26 is energized, the normally-off solenoid valve 26 controls the first oil passage 25 to be communicated so as to communicate the first cavity 23 with the buffer cavity 71, as the stroke of the brake pedal increases, the stroke of the first piston 22 moving toward the first cavity 23 also increases, when the stroke of the first piston 22 moving toward the first cavity 23 reaches a certain distance, the first cavity 23 is disconnected from the oil storage device 10, as the first piston 22 continues to move toward the first cavity 23, the volume of the first cavity 23 is smaller, and as the volume of the first cavity 23 is smaller, the hydraulic pressure of hydraulic oil (brake fluid) in the first cavity 23 increases.
At this time, since the first chamber 23 is communicated with the buffer chamber 71, the hydraulic oil (brake fluid) in the first chamber 23 can flow to the buffer chamber 71 of the pedal reaction force simulator 70, and as the hydraulic oil (brake fluid) flowing into the buffer chamber 71 increases, the hydraulic oil (brake fluid) in the buffer chamber 71 increases, and then the hydraulic oil (brake fluid) in the buffer chamber 71 can push the fourth piston 73 to move toward the mounting chamber 74 (i.e. push the fourth piston 73 to move toward the right side as shown in fig. 1), when the fourth piston 73 moves toward the mounting chamber 74, the third elastic member 75 can be compressed, and when the third elastic member 75 is compressed, a reaction force can be generated to push the fourth piston 73, and the reaction force can be transmitted to the first piston 22 through the hydraulic oil (brake fluid) and then to the brake pedal, and thus the arrangement can be provided for the brake pedal, when the driver tramples the pedal, the pedal has trampling resistance, the driver does not have the feeling of bouncing feet, and the driver can feel the trampling feeling, so that the driver can have more comfortable driving experience.
Alternatively, the first elastic member 47, the second elastic member 48 and the third elastic member 75 may be provided as springs, but the application is not limited thereto, and the first elastic member 47, the second elastic member 48 and the third elastic member 75 may be selected according to actual requirements.
In some embodiments of the present invention, as shown in fig. 1, a third sealing member 76 may be interposed between the simulator cylinder 72 and the fourth piston 73, an inner surface of a peripheral wall of the simulator cylinder 72 may be provided with a boss 77, the boss 77 may be provided with a mounting groove 78, and the third sealing member 76 may be disposed within the mounting groove 78. It should be explained that the third seal 76 may be interposed between the simulator cylinder 72 and the fourth piston 73, the boss 77 may be provided on the inner surface of the peripheral wall of the simulator cylinder 72, the boss 77 may protrude from the inner surface of the peripheral wall of the simulator cylinder 72, and one end of the boss 77 protruding from the inner surface of the peripheral wall of the simulator cylinder 72 may extend toward the axial direction of the simulator cylinder 72.
The boss 77 may be provided with an installation groove 78, the installation groove 78 may be formed by a machining method, and the third sealing member 76 may be disposed in the installation groove 78, so that hydraulic oil (brake fluid) in the buffer chamber 71 may be prevented from flowing into the installation chamber 74 through a gap between the simulator cylinder 72 and the fourth piston 73, and thus the buffer chamber 71 may have a better sealing property, and it may be ensured that the pedal reaction force simulator 70 may reliably provide reaction force for the brake pedal.
As some embodiments of the present invention, as shown in fig. 1, the inner surfaces of the peripheral walls of the second cylinder 42 and the first cylinder 21 may be opened with a plurality of mounting grooves 78. Alternatively, the inner surface of the peripheral wall of the first cylinder block 21 may be provided with two mounting grooves 78, the inner surface of the peripheral wall of the second cylinder block 42 may be provided with four mounting grooves 78,
the four mounting grooves 78 formed in the second cylinder 42 may be used to mount the first sealing element 51, the second sealing element 52, the sixth sealing element 58 and the seventh sealing element 59, respectively, the two mounting grooves 78 formed in the first cylinder 21 may be used to mount the fourth sealing element 28 and the fifth sealing element 29, respectively, such that the first sealing element 51 and the second sealing element 52 may be conveniently disposed between the second cylinder 42 and the third piston 44, the fourth sealing element 28 and the fifth sealing element 29 may be conveniently disposed between the first cylinder 21 and the first piston 22, and the sixth sealing element 58 and the seventh sealing element 59 may be conveniently disposed between the second cylinder 42 and the second piston 43, thereby reducing the difficulty in assembling the brake cylinder 40 and the pedal input cylinder 20, and improving the assembling efficiency of the brake cylinder 40 and the pedal input cylinder 20.
In some embodiments of the present invention, as shown in fig. 1, a flow passage 57 may be disposed in the second cylinder 42, and the flow passage 57 may communicate with the first cavity 23 through the second oil passage 32, it should be explained that the flow passage 57 may be disposed on the second cylinder 42, one end of the flow passage 57 may communicate with the second cavity 41, the other end of the flow passage 57 may communicate with the second oil passage 32, and specifically, one end of the flow passage 57 may communicate with the second sub-cavity 46.
When the electric booster 1 fails, the normally-on electromagnetic valve 49 is de-energized, and the second oil path 32 can be conducted when the normally-on electromagnetic valve 49 is de-energized, at this time, along with the increase of the hydraulic pressure of the hydraulic oil (brake fluid) in the first cavity 23, the hydraulic oil (brake fluid) in the first cavity 23 can flow into the second cavity 41 through the second oil path 32 and the flow passage 57, specifically, the hydraulic oil (brake fluid) in the first cavity 23 can flow into the second sub-cavity 46 through the second oil path 32 and the flow passage 57, so that the second oil path 32 is conveniently arranged on the electric booster 100, the assembly difficulty of the electric booster 100 can be further reduced, and the assembly efficiency of the electric booster 100 can be further improved.
As some embodiments of the present invention, when the electric booster 100 of the present application is in the power-off and non-braking state, the normally-on solenoid valve 49 is powered off, and the second oil path 32 may be conducted when the normally-on solenoid valve 49 is powered off, that is, when the normally-on solenoid valve 49 is powered off, the second sub-chamber 46 is communicated with the first chamber 23, and at this time, the oil storage device 10 is communicated with the first sub-chamber 45, and the oil storage device 10 is communicated with the first chamber 23 through the third oil path 11, therefore, when the electric booster 100 of the present application is in the power-off and non-braking state, the second sub-chamber 46, the first sub-chamber 45, and the first chamber 23 are all communicated with the oil storage device 10, which is configured to ensure that the process of vacuuming and injecting hydraulic oil (brake fluid) of the electric booster 100 is.
As some embodiments of the present invention, during braking of the vehicle, the electric booster 100 needs to compensate for hydraulic oil (brake fluid) as the friction plates of the vehicle wear, and specifically, the first sub-chamber 45 communicates with the oil storage device 10 each time braking is released, and the oil storage device 10 can compensate for the hydraulic oil (brake fluid) to the first sub-chamber 45.
Since the second sub-chamber 46 is not directly communicated with the oil storage device 10, hydraulic oil (brake fluid) cannot be compensated from the oil storage device 10 every time the brake is released, therefore, the process of compensating the hydraulic oil (brake fluid) by the second sub-chamber 46 is divided into two cases, one of which is that when the electric booster 100 is in a power-off and non-braking state, the oil storage device 10 is communicated with the first chamber 23, the oil storage device 10 can compensate the hydraulic oil (brake fluid) for the second sub-chamber 46 through the first chamber 23, the second oil path 32 and the flow path 57, and the other is that when the electric booster 100 is in a normal working state (i.e. a charged state), the states of the normally-off electromagnetic valve 26 and the normally-on electromagnetic valve 49 can be controlled through an electric control means according to the running condition input information of the vehicle to actively compensate the hydraulic oil (brake fluid) for the second sub-chamber 46, so as to compensate the hydraulic oil (brake fluid) for the first sub-chamber, thereby ensuring the driving safety of the vehicle.
As some embodiments of the present invention, a fourth elastic member 31 may be disposed in the first chamber 23, one end of the fourth elastic member 31 may be connected to the bottom wall of the first cylinder 21, and the other end of the fourth elastic member 31 may be connected to the first piston 22, and the first piston 22 may compress the fourth elastic member 31 when the first piston 22 moves toward the left side as shown in fig. 1.
Further, when the electric assist propulsion device 1 is in a normal operation state, the first chamber 23 of the pedal input cylinder 20 communicates with the cushion chamber 71 of the pedal reaction force simulator 70, and the pedal feel adjustment can be achieved by adjusting three parameters of the bore ratio of the third elastic member 75, the fourth elastic member 31, the first cylinder 21, and the simulator cylinder 72, so that the "springfoot" feel at the time of pedal retraction can be further improved.
Further, by adjusting the cylinder diameter of the first cylinder 21 and the fourth elastic member 31, the maximum output hydraulic pressure of the electric booster 100 when the electric booster pushing device 1 fails can be adjusted, and particularly, the maximum output hydraulic pressure can be increased by reducing the cylinder diameter of the first cylinder 21, so that the vehicle can have a higher deceleration.
According to the vehicle of the embodiment of the invention, the electric booster 100 comprises the electric booster 100 of the embodiment, the electric booster 100 can be arranged on the vehicle, and by arranging the electric booster 100, when the boosting fails, the situation that the output hydraulic pressure is low due to the reaction force of the pedal reaction force simulator 70 can be avoided, so that the use reliability and the use range of the electric booster 100 can be improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more.
In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.
In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. Electric booster (100) for a vehicle, characterized by comprising:
an oil reservoir (10);
a pedal input hydraulic cylinder (20), the pedal input hydraulic cylinder (20) comprising a first cylinder (21) and a first piston (22), the first cylinder (21) and the first piston (22) together defining a first cavity (23), the first cavity (23) being selectively in communication with the oil reservoir (10), the first piston (22) being connected to a brake pedal of the vehicle, the brake pedal being adapted to drive the first piston (22) in movement to vary the volume of the first cavity (23);
a pedal reaction force simulator (70), the pedal reaction force simulator (70) being adapted to provide a reaction force to the brake pedal, the pedal reaction force simulator (70) defining a variable volume cushion chamber (71) therein, the first chamber (23) being in selective communication with the cushion chamber (71);
a brake cylinder (40), a second chamber (41) being defined in the brake cylinder (40), the second chamber (41) being in selective communication with the first chamber (23), the second chamber (41) being in communication with a brake of the vehicle.
2. The electric booster (100) of the vehicle according to claim 1, wherein a first oil path (25) is connected between the first cavity (23) and the buffer chamber (71), and a normally-open solenoid valve (26) is arranged on the first oil path (25).
3. Electric booster (100) of a vehicle according to claim 1, characterized in that said brake cylinder (40) comprises: a second cylinder (42) and a second piston (43), the second cylinder (42) and the second piston (43) jointly define the second cavity (41), a third piston (44) is arranged in the second cavity (41), the third piston (44) separates the second cavity (41) into a first sub-cavity (45) and a second sub-cavity (46), the first sub-cavity (45) is selectively communicated with the oil storage device (10), and the second sub-cavity (46) is selectively communicated with the first cavity (23).
4. Electric booster (100) for vehicles according to claim 3, characterized in that said second sub-chamber (46) communicates with said first chamber (23) through a second oil passage (32), said second oil passage (32) being provided with a normally-on solenoid valve (49).
5. The electric booster (100) of the vehicle according to claim 3, wherein the second sub-chamber (46) is formed between the third piston (44) and the second piston (43), the first sub-chamber (45) is formed between the third piston (44) and the second cylinder (42), the first elastic member (47) is supported between the third piston (44) and the second piston (43), and the second elastic member (48) is supported between the third piston (44) and the second cylinder (42).
6. The electric booster (100) for a vehicle according to claim 3, wherein a side wall of the second cylinder (42) is provided with a first liquid inlet (50) penetrating the side wall of the second cylinder (42), a first seal (51) and a second seal (52) provided at intervals in an axial direction of the second cylinder (42) are provided in the second cylinder (42), and the first liquid inlet (50) is located between the first seal (51) and the second seal (52);
the first sealing element (51) and the second sealing element (52) are clamped between the second cylinder body (42) and the third piston (44), and a second liquid inlet (53) suitable for being communicated with the first liquid inlet (50) is formed in the third piston (44);
the side wall of the first cylinder body (21) is provided with a third liquid inlet (27) penetrating through the side wall of the first cylinder body (21), a fourth sealing piece (28) and a fifth sealing piece (29) which are arranged at intervals in the axial direction of the first cylinder body (21) are arranged in the first cylinder body (21), and the third liquid inlet (27) is positioned between the fourth sealing piece (28) and the fifth sealing piece (29);
the fourth sealing element (28) and the fifth sealing element (29) are respectively clamped between the first cylinder body (21) and the first piston (22), and a fourth liquid inlet (30) suitable for being communicated with the third liquid inlet (27) is formed in the first piston (22).
7. Electric booster (100) of a vehicle according to claim 1, characterized in that the pedal reaction force simulator (70) comprises: a simulator cylinder (72) and a fourth piston (73), the fourth piston (73) being slidably disposed within the simulator cylinder (72) to divide the interior of the simulator cylinder (72) into the cushion chamber (71) and a mounting chamber (74);
a third elastic member (75) is provided in the mounting chamber (74), and the third elastic member (75) is supported between the fourth piston (73) and the simulator cylinder (72).
8. Electric booster (100) for vehicles according to claim 7, characterized in that a third seal (76) is interposed between the simulator cylinder (72) and the fourth piston (73);
the inner surface of the peripheral wall of the simulator cylinder body (72) is provided with a boss (77), the boss (77) is provided with a mounting groove (78), and the third sealing element (76) is arranged in the mounting groove (78).
9. Electric booster (100) for vehicles according to claim 3, characterized in that the second cylinder (42) is provided with a flow passage (57), the flow passage (57) communicating with the first cavity (23) through a second oil passage (32).
10. A vehicle, characterized by comprising an electric booster (100) of a vehicle according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110455806.XA CN113085997A (en) | 2021-04-26 | 2021-04-26 | Electric booster of vehicle and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110455806.XA CN113085997A (en) | 2021-04-26 | 2021-04-26 | Electric booster of vehicle and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113085997A true CN113085997A (en) | 2021-07-09 |
Family
ID=76680091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110455806.XA Withdrawn CN113085997A (en) | 2021-04-26 | 2021-04-26 | Electric booster of vehicle and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113085997A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116101240A (en) * | 2021-11-10 | 2023-05-12 | 长沙泊呈科技有限公司 | Pedal simulator for vehicle braking system and braking method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120045597A (en) * | 2010-10-29 | 2012-05-09 | 현대모비스 주식회사 | Electric booster type brake system |
| CN102774371A (en) * | 2011-04-20 | 2012-11-14 | 现代摩比斯株式会社 | Failure protection enhanced electric power assisting braking device |
| JP2013154841A (en) * | 2012-01-31 | 2013-08-15 | Hitachi Automotive Systems Ltd | Brake device |
| CN103318162A (en) * | 2013-05-09 | 2013-09-25 | 同济大学 | Pedal decoupling type and integrated type brake master cylinder assembly for measuring integrated pedal displacement |
| CN103552557A (en) * | 2013-11-18 | 2014-02-05 | 扬州泰博汽车电子智能科技有限公司 | Electro-hydraulic composite braking system with electric braking assistant force and brake-by-wire function |
| CN111016867A (en) * | 2018-10-09 | 2020-04-17 | 上海汽车集团股份有限公司 | Vehicle and braking system thereof |
-
2021
- 2021-04-26 CN CN202110455806.XA patent/CN113085997A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120045597A (en) * | 2010-10-29 | 2012-05-09 | 현대모비스 주식회사 | Electric booster type brake system |
| CN102774371A (en) * | 2011-04-20 | 2012-11-14 | 现代摩比斯株式会社 | Failure protection enhanced electric power assisting braking device |
| JP2013154841A (en) * | 2012-01-31 | 2013-08-15 | Hitachi Automotive Systems Ltd | Brake device |
| CN103318162A (en) * | 2013-05-09 | 2013-09-25 | 同济大学 | Pedal decoupling type and integrated type brake master cylinder assembly for measuring integrated pedal displacement |
| CN103552557A (en) * | 2013-11-18 | 2014-02-05 | 扬州泰博汽车电子智能科技有限公司 | Electro-hydraulic composite braking system with electric braking assistant force and brake-by-wire function |
| CN111016867A (en) * | 2018-10-09 | 2020-04-17 | 上海汽车集团股份有限公司 | Vehicle and braking system thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116101240A (en) * | 2021-11-10 | 2023-05-12 | 长沙泊呈科技有限公司 | Pedal simulator for vehicle braking system and braking method |
| CN116101240B (en) * | 2021-11-10 | 2024-04-23 | 长沙泊呈科技有限公司 | Pedal simulator for vehicle braking system and braking method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102118612B1 (en) | Braking device for a braking system of a vehicle and braking system for a vehicle | |
| KR101311078B1 (en) | Brake system for motor vehicles | |
| CN104176027B (en) | Main braking cylinder system and braking system for vehicle | |
| KR20110120928A (en) | Hydraulic brake system with controlled boost | |
| KR101946185B1 (en) | Hydraulic control device and brake system | |
| CN108263366B (en) | Brake system for vehicle | |
| KR20150132453A (en) | Vehicle brake system with dual acting plunger assembly | |
| CN101208225A (en) | Brake power generator for a hydraulic vehicle braking system | |
| US7644997B2 (en) | Master cylinder with fill-up function | |
| JPS63306961A (en) | Brake drive for automobile | |
| WO2015016302A1 (en) | Brake system | |
| US20150001916A1 (en) | Brake system for vehicle designed to produce braking force in case of loss of electric power | |
| US20150001921A1 (en) | Brake system for vehicle designed to facilitate air purging during braking | |
| US20150000266A1 (en) | Brake system for vehicle designed to improve mountability | |
| US20220203950A1 (en) | Hydraulic pressure supply device | |
| US20150001918A1 (en) | Brake system for vehicle designed to ensure stability in motion of brake pedal | |
| CN209441352U (en) | Brake apparatus for hydraulic motor vehicle braking equipment | |
| US9162655B2 (en) | Brake system for vehicle designed to improve durability and maneuvering feeling | |
| CN102092376A (en) | Hybrid brake system | |
| CN113085997A (en) | Electric booster of vehicle and vehicle | |
| CN113335247B (en) | Pedal feel simulator assembly and brake system | |
| CN113788000A (en) | Fully-decoupled electro-hydraulic servo brake system | |
| CN112824173B (en) | Hydraulic pressure adjusting unit in automobile brake system, automobile and control method | |
| US9592806B2 (en) | Stroke simulator | |
| US6311492B1 (en) | Master cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210709 |