Brake connecting device, connecting structure and working method

Abstract

The invention discloses a brake connecting device, a connecting structure and a working method, a main brake oil pipe is connected between a pedal force simulator and a brake driver, a pedal force regulator is coaxially fixed in the pedal force simulator, the pedal force simulator and the pedal force regulator are both of a piston structure, pistons of the pedal force simulator and the pedal force regulator are of a coaxial linkage structure, and the pedal force simulator and the pedal force regulator are connected with the brake driver. The pedal force regulator and the brake driver are respectively connected with an oil storage and oil pumping mechanism through a regulator oil pipe and a backup brake oil pipe; hydraulic oil in the pedal force simulator can be input into the brake driver through the main brake oil pipe to generate brake driving force for braking; hydraulic oil can be pumped into or out of the pedal force regulator through the regulator oil pipe, and the oil pressure in the pedal force regulator is regulated, so that the pedal force is regulated; hydraulic oil can be directly pumped into the brake driver through the backup brake oil pipe to generate brake driving force, and the situation that when the main brake oil pipe fails, driving force cannot be generated through the brake driver, and consequently brake failure is caused is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile brake components, and in particular to a brake connection device, a connection structure and a working method. Background Art

[0002] With the booming global automotive market and the maturing overseas market, the demand for right-hand drive vehicles is growing. Currently, mainstream right-hand drive vehicles generally have the brake pedal and brake booster located on the right side of the vehicle. However, since the brake booster is typically located in the engine compartment, this inevitably requires adjustments to the engine compartment layout, significantly reducing component versatility and increasing R&D and production costs.

[0003] After searching relevant patent documents, it was found that in the technical solution of Chinese patent CN202863420U "A Vacuum Booster Operating Mechanism for Automobile Braking System", the booster operating mechanism adopts a purely mechanical structure, and its operation must strictly follow the motion laws of the mechanical system and meet relevant performance requirements, and can only be arranged in the passenger compartment. This arrangement has obvious defects: on the one hand, this arrangement structure occupies a large amount of passenger compartment space, resulting in the need for avoidance design of components such as the instrument panel and automatic air conditioning in the passenger compartment, which seriously restricts the design optimization of these components; on the other hand, the two additional sets of kinematic pairs set in this patent lead to increased loss of braking force during transmission, which not only reduces the braking force transmission efficiency, but also prolongs the braking response time, making it difficult for the braking time to meet the high performance and high safety requirements of modern automobiles.

[0004] In summary, how to effectively solve the problems of the brake pedal and brake booster connection device occupying passenger compartment space, low braking force transmission efficiency and poor braking time in right-hand drive vehicles without adjusting the engine compartment layout has become a technical challenge that needs to be overcome in this field. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the above-mentioned background technology and provide a brake connection device, connection structure and working method for connecting the brake pedal and the brake booster, which does not require adjustment of the layout of the engine compartment, does not occupy the passenger compartment space, has high braking force transmission efficiency and fast braking response.

[0006] To achieve this purpose, the brake connection device designed by the present invention includes a pedal force simulator and a brake driver, a main brake oil pipe is connected between the pedal force simulator and the brake driver, a pedal force regulator is coaxially fixed inside the pedal force simulator, the pedal force simulator and the pedal force regulator are both piston structures, the piston of the pedal force simulator and the piston of the pedal force regulator are coaxial linkage structures, the pedal force regulator and the brake driver are respectively connected to an oil storage and oil pumping mechanism through a regulator oil pipe and a backup brake oil pipe; the hydraulic oil inside the pedal force simulator can be input into the brake driver through the main brake oil pipe to generate a braking driving force for braking; the oil storage and oil pumping mechanism can pump hydraulic oil into or out of the pedal force regulator through the regulator oil pipe to adjust the oil pressure inside the pedal force regulator, thereby adjusting the pedal force; the oil storage and oil pumping mechanism can pump hydraulic oil directly into the brake driver through the backup brake oil pipe to generate a braking driving force, thereby avoiding the inability to generate driving force through the brake driver when the main brake oil pipe fails, resulting in brake failure.

[0007] Furthermore, the pedal force simulator includes a pedal force simulator cylinder with a cavity inside, a pedal force simulator piston is coaxially arranged inside the pedal force simulator cylinder, a pedal force simulator piston return spring is fixedly connected between the inner surface of one end of the pedal force simulator cylinder and the pedal force simulator piston, and a pedal force simulator push rod is coaxially fixedly connected to the pedal force simulator piston, the end of which passes through the other end of the pedal force simulator cylinder; the pedal force adjuster is coaxially fixed on the inner surface of one end of the pedal force simulator cylinder.

[0008] Furthermore, the pedal force regulator includes a pedal force regulator cylinder body which is coaxially fixed on the inner surface of one end of the pedal force simulator cylinder body and has a cavity inside. A pedal force regulator piston is coaxially arranged inside the pedal force regulator cylinder body. A pedal force regulator piston return spring is fixedly connected between the inner surface of one end of the pedal force regulator cylinder body and the pedal force regulator piston. The pedal force regulator piston and the pedal force simulator piston are directly or indirectly coaxially fixed to form the coaxial linkage structure.

[0009] Furthermore, the brake driver includes a brake driver cylinder with a cavity inside, a brake driver piston is coaxially arranged inside the brake driver cylinder, a brake driver piston return spring is fixedly connected between the inner surface of one end of the brake driver cylinder and the brake driver piston, and a brake driver push rod with an end passing through the brake driver cylinder is coaxially fixedly connected to the brake driver piston, and the brake driving force generated by the brake driver can be output to the outside through the brake driver push rod.

[0010] Furthermore, the oil storage and oil pumping mechanism includes an oil tank, an oil pump connected to the oil tank through a pipeline, and a three-way solenoid valve whose interface is connected to the oil pump through a pipeline. The other two interfaces of the three-way solenoid valve are respectively connected to the regulator oil pipe and the backup brake oil pipe. The oil storage and oil pumping mechanism can be selectively connected to the regulator oil pipe or the backup brake oil pipe through the three-way solenoid valve.

[0011] Furthermore, a connection structure of a brake connection device includes a pedal mechanism and a brake mechanism, a first linkage push structure is connected between the power output end of the pedal mechanism and the piston of the pedal force simulator, and a second linkage push structure is connected between the power output end of the brake driver and the brake mechanism.

[0012] Furthermore, the pedal mechanism includes a brake pedal arm, and the brake mechanism includes a brake booster; the first linkage push structure includes a pedal ball cage structure fixed to the brake pedal arm and a pedal force simulator push rod having one end fixedly connected to the piston of the pedal force simulator and the other end hingedly connected to the pedal ball cage structure; the second linkage push structure includes a brake driver push rod fixedly connected between the piston of the brake driver and the brake booster.

[0013] Furthermore, a working method of the connection structure of a brake connection device includes a conventional working method when the regulator oil pipe has not failed, a pedal force adjustment method and a failure control method when the regulator oil pipe fails; the conventional working method includes: the pedal mechanism drives the piston action of the pedal force simulator through the first linkage push structure, and the hydraulic oil in the pedal force simulator is input into the brake driver through the main brake oil pipe to drive the piston action of the brake driver, and the brake mechanism is driven to move through the second linkage push structure; the pedal force adjustment method includes: pumping the hydraulic oil of the oil storage and oil pumping mechanism into or out of the pedal force regulator through the regulator oil pipe; the failure control method includes: pumping the hydraulic oil of the oil storage and oil pumping mechanism directly into the brake driver through the backup brake oil pipe.

[0014] Furthermore, the pedal force adjustment method also includes: monitoring the hydraulic oil pressure inside the pedal force regulator, setting a preferred value or preferred range of the hydraulic oil pressure inside the pedal force regulator, and comparing the hydraulic oil pressure inside the pedal force regulator with the preferred value or preferred range of the hydraulic oil pressure inside the pedal force regulator; if the hydraulic oil pressure inside the pedal force regulator is greater than the preferred value or preferred range of the hydraulic oil pressure inside the pedal force regulator, the hydraulic oil inside the pedal force regulator is pumped out to the oil storage and oil pumping mechanism; if the hydraulic oil pressure inside the pedal force regulator is less than the preferred value or preferred range of the hydraulic oil pressure inside the pedal force regulator, the hydraulic oil of the oil storage and oil pumping mechanism is pumped into the pedal force regulator; if the hydraulic oil pressure inside the pedal force regulator is equal to the preferred value of the hydraulic oil pressure inside the pedal force regulator or is within the preferred range, the hydraulic oil inside the pedal force regulator is not pumped in or out.

[0015] Furthermore, the failure control method also includes: monitoring the hydraulic oil pressure inside the pedal force simulator and the hydraulic oil pressure inside the brake driver, setting a minimum value of the hydraulic oil pressure inside the pedal force simulator and a threshold value of the hydraulic oil pressure inside the brake driver, and comparing the hydraulic oil pressure inside the pedal force simulator with the minimum value of the hydraulic oil pressure inside the pedal force simulator; if the hydraulic oil pressure inside the pedal force simulator is less than the minimum value of the hydraulic oil pressure inside the pedal force simulator, the oil storage and oil pumping mechanism pumps the hydraulic oil directly into the brake driver through the backup brake oil pipe until the hydraulic oil pressure inside the brake driver reaches the threshold value of the hydraulic oil pressure inside the brake driver.

[0016] The beneficial effects of the present invention are:

[0017] 1. No need to adjust the engine compartment layout, improving component commonality: This invention connects the pedal force simulator and brake actuator via hydraulic piping, achieving physical separation between the brake pedal and the brake booster. The brake booster can maintain its existing engine compartment layout for left-hand drive vehicles, eliminating the need for redesigning the engine compartment layout or developing specialized components for right-hand drive vehicles. This significantly reduces R&D costs, tooling investment, and production transition difficulties for right-hand drive vehicles, while increasing component commonality across vehicle platforms.

[0018] 2. Optimizing passenger compartment space utilization and reducing design constraints: Compared to traditional mechanical transmission mechanisms, the hydraulic drive assembly of this invention is smaller, and the pedal force simulator can be flexibly placed in non-critical areas of the passenger compartment (such as under the instrument panel or under the seat), eliminating the need for mechanical structures to avoid components such as the instrument panel and air conditioning. This design eliminates passenger compartment space constraints, provides greater freedom for interior design optimization, and improves interior space utilization and passenger comfort.

[0019] 3. Improved braking force transmission efficiency and shortened braking response time: The use of hydraulic direct drive instead of traditional mechanical multi-motion drive reduces force loss caused by mechanical friction and backlash, resulting in higher braking force transmission efficiency (hydraulic transmission efficiency typically exceeds 90%, compared to the 70% to 80% for mechanical transmission). The instantaneous pressure transmission characteristics of hydraulic oil significantly shorten force transmission lag time. Combined with the compact linkage structure design, this effectively reduces brake response delay, improves braking safety, and meets the high-performance braking requirements of modern vehicles.

[0020] 4. Precise pedal force adjustment to suit different driving needs: The pedal force regulator, through coordinated control of the oil storage and pumping mechanism, monitors and adjusts the hydraulic pressure within the pedal force simulator in real time, thereby precisely adjusting the brake pedal's feedback force. For example, different pedal force parameters can be set for different driving modes (Comfort / Sport) to enhance the driving experience; the pedal force requirements of drivers of different body types can be adapted to enhance the adaptability and convenience of braking operations.

[0021] 5. Multiple failure protection designs ensure braking system reliability: If the main brake oil line fails due to leakage or blockage, the backup brake oil line can directly pump hydraulic oil to the brake actuator through the oil storage and pumping mechanism, ensuring normal braking force output and preventing brake failure. By real-time monitoring of the hydraulic pressure of the pedal force simulator and the brake actuator, if abnormal pressure values ​​are detected, the system automatically switches to the backup oil circuit until the brake pressure returns to a safe threshold, significantly improving the braking system's fault tolerance and driving safety.

[0022] 6. Compact structure and strong compatibility, enabling easy integration and rollout: All components of the device (pedal force simulator, brake actuator, oil storage mechanism, etc.) adopt a modular design, resulting in a compact structure and standardized interfaces. This allows for the development of right-hand-drive versions for various vehicle types (sedans, SUVs, commercial vehicles, etc.). Furthermore, no major modifications to core components such as the existing brake booster are required, reducing the difficulty of technology implementation and facilitating rapid rollout and application within existing production lines.

[0023] In summary, this invention, through innovative hydraulic transmission, modular design, and intelligent control, addresses core issues of right-hand-drive vehicle braking systems, including space occupation, inefficiency, and responsiveness, without altering the engine compartment layout. It also ensures pedal force adjustability and fail-safe operation. This technical solution significantly reduces R&D costs, improves braking performance and reliability, and provides a practical solution for the efficient development of right-hand-drive vehicles, with high engineering application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments disclosed in the present invention, the drawings of the embodiments will be briefly introduced below. These drawings are only used for illustrative purposes and are not intended to limit the scope of protection of the present invention.

[0025] Figure 1 A schematic diagram of the principle of the connection structure of the brake connection device designed for the present invention;

[0026] Figure 2 Schematic diagram of the integrated structure of the pedal force simulator and the pedal force simulator in the present invention;

[0027] Figure 3 This is a flow chart of the working and control method of the connection structure of the brake connection device in the present invention;

[0028] Among them, 1—brake pedal, 2—brake pedal arm, 3—brake pedal arm rotating shaft, 4—pedal force simulator push rod, 5—pedal force simulator cylinder, 6—pedal force simulator adjusting chamber, 7—pedal force simulator piston displacement sensor, 8—pedal ball cage structure, 9—pedal force simulator adjusting chamber pressure sensor, 10—oil pump, 11—oil tank, 12—ECU, 13—brake booster, 14—brake driver push rod, 15—brake driver piston return spring, 16—brake driver piston, 17—brake driver piston oil seal, 18—brake driver piston buffer pad, 19—brake driver adjusting chamber, 20—brake driver cylinder, 21—pedal force regulator piston oil seal, 22—pedal force regulator adjusting chamber, 23—pedal force regulator cylinder , 24—pedal force regulator piston return spring, 25—pedal force regulator piston buffer pad, 26—pedal force simulator piston return spring, 27—pedal force simulator piston, 28—pedal force simulator piston oil seal, 29—pedal force simulator piston buffer pad, 30—main brake oil pipe, 31—regulator oil pipe, 32—first main oil pipe, 33—pedal force regulator piston, 34—pedal force regulator regulating chamber pressure sensor, 35—driver solenoid valve, 36—simulator solenoid valve, 37—brake driver regulating chamber pressure sensor, 38—three-way solenoid valve, 39—second main oil pipe, 40—backup brake oil pipe, 41—backup brake solenoid valve, 42—fluid replenishing valve, 43—pedal force simulator, 44—brake driver, 45—pedal force regulator. DETAILED DESCRIPTION

[0029] The following further describes the technical solutions (including preferred technical solutions) of the present invention through accompanying drawings and by enumerating some optional embodiments of the present invention. It should be understood that the embodiments described are merely some, and not all, of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0030] Definition of noun:

[0031] Pedal force simulator: A mechanism that converts pedal force into hydraulic oil power.

[0032] Pedal force regulator: a mechanism that enables variable adjustment of pedal force.

[0033] Pedal force driver: The mechanism that converts the power of hydraulic oil into the power of brake booster.

[0034] The present invention provides a braking connection device, a connection structure of the braking connection device and a working method of the connection structure of the braking connection device.

[0035] In certain embodiments, the brake connection device designed by the present invention includes a pedal force simulator 43 and a brake driver 44, a main brake oil pipe 30 is connected between the pedal force simulator 43 and the brake driver 44, a pedal force regulator 45 is coaxially fixed inside the pedal force simulator 43, the pedal force simulator 43 and the pedal force regulator 45 are both piston structures, the piston of the pedal force simulator 43 and the piston of the pedal force regulator 45 are coaxial linkage structures, the pedal force regulator 45 and the brake driver 44 are respectively connected to the oil storage and oil pumping mechanism through the regulator oil pipe 31 and the backup brake oil pipe 40.

[0036] The hydraulic oil inside the pedal force simulator 43 can be input into the brake driver 44 through the main brake oil pipe 30 to generate a braking driving force for braking; the oil storage and oil pumping mechanism can pump hydraulic oil into or out of the pedal force regulator 45 through the regulator oil pipe 31 to adjust the oil pressure inside the pedal force regulator 45, thereby adjusting the pedal force; the oil storage and oil pumping mechanism can pump hydraulic oil directly into the brake driver 44 through the backup brake oil pipe 40 to generate a braking driving force, thereby avoiding the inability to generate driving force through the brake driver 44 when the main brake oil pipe 30 fails, resulting in brake failure.

[0037] Example 1

[0038] Based on some of the above embodiments, a specific embodiment of a brake connection device is provided:

[0039] like Figure 1 —2, the pedal force simulator 43 includes a pedal force simulator cylinder 5 with a pedal force simulator regulating chamber 6 inside, a pedal force simulator piston 27 is coaxially arranged inside the pedal force simulator regulating chamber 6, a pedal force simulator piston return spring 26 is fixedly connected between the cavity surface of one end of the pedal force simulator regulating chamber 6 and the pedal force simulator piston 27, a pedal force simulator piston oil seal 28 is installed on the pedal force simulator piston 27, a pedal force simulator piston buffer pad 29 is fixed on the cavity surface of the other end of the pedal force simulator regulating chamber 6, a pedal force simulator push rod 4 with its end passing through the other end of the pedal force simulator regulating chamber 6 is coaxially fixed on the pedal force simulator piston 27, and the pedal force simulator regulating chamber 6 is connected to a pedal force simulator piston displacement sensor 7, a pedal force simulator regulating chamber pressure sensor 9 and a simulator solenoid valve 36.

[0040] The pedal force regulator 45 is coaxially fixed on the cavity surface of one end of the pedal force simulator regulating chamber 6. The pedal force regulator 45 includes a pedal force regulator cylinder 23 coaxially fixed on the cavity surface of one end of the pedal force simulator regulating chamber 6 and having a pedal force regulator regulating chamber 22 inside. A pedal force regulator piston 33 is coaxially arranged inside the pedal force regulator regulating chamber 22. A pedal force regulator piston return spring 24 is fixedly connected between the cavity surface of one end of the pedal force regulator regulating chamber 22 and the pedal force regulator piston 33. A pedal force regulator piston oil seal 21 is installed on the pedal force regulator piston 33. A pedal force regulator piston buffer pad 25 is fixed on the cavity surface of one end of the pedal force regulator regulating chamber 22. The pedal force regulator piston 33 and the pedal force simulator piston 27 are coaxially fixed to form a coaxial linkage structure. The pedal force regulator regulating chamber 22 is connected to a pedal force regulator regulating chamber pressure sensor 34.

[0041] The brake driver 44 includes a brake driver cylinder 20 with a brake driver regulating chamber 19 inside. A brake driver piston 16 is coaxially arranged inside the brake driver regulating chamber 19. A brake driver piston return spring 15 is fixedly connected between the inner surface of one end of the brake driver regulating chamber 19 and the brake driver piston 16. A brake driver push rod 14 with its end passing through the brake driver regulating chamber 19 is coaxially fixedly connected to the brake driver piston 16. The brake driver regulating chamber 19 is connected to a driver solenoid valve 35, a brake driver regulating chamber pressure sensor 37 and a backup brake solenoid valve 41.

[0042] The oil storage and oil pumping mechanism includes an oil tank 11, an oil pump 10 connected to the oil tank 11 through a second main oil pipe 39, and a three-way solenoid valve 38 with an interface connected to the oil pump 10 through a first main oil pipe 32. The other two interfaces of the three-way solenoid valve are connected to the pedal force regulator regulating chamber 22 and the backup brake solenoid valve 41 through the regulator oil pipe 31 and the backup brake oil pipe 40 respectively. The oil tank 11 can be selectively connected to the regulator oil pipe 31 or the backup brake oil pipe 40 through the three-way solenoid valve 38 and the oil pump 10.

[0043] The main brake oil pipe 30 is connected between the driver solenoid valve 35 and the simulator solenoid valve 36, and the main brake oil pipe 30 is connected to the fluid replenishment valve 42. The oil pump 10, the three-way solenoid valve 38, the pedal force regulator regulating chamber pressure sensor 34, the pedal force simulator regulating chamber pressure sensor 9, the simulator solenoid valve 36, the pedal force simulator piston displacement sensor 7 and the brake driver regulating chamber pressure sensor 37 are all electrically connected to the ECU12.

[0044] Example 2

[0045] Based on Example 1, a specific embodiment of the connection structure of a brake connection device is provided:

[0046] like Figure 1 As shown, the pedal force simulator push rod 4 is hingedly connected to a pedal ball cage structure 8, which is fixed to the brake pedal arm 2. Depressing the brake pedal 1 drives the brake pedal arm 2 to rotate about the brake pedal arm rotation axis 3, thereby transmitting the pedal force through the pedal force simulator push rod 4 to the pedal force simulator 43. The brake actuator push rod 14 is connected to the brake booster 13, which uses the hydraulic driving force of the brake actuator 44 as the input force of the brake booster 13. The brake booster 13 amplifies the braking force to achieve the braking operation of the brake system.

[0047] Example 3

[0048] Based on Example 2, a specific embodiment of the working and control method of the connection structure of a brake connection device is provided:

[0049] like Figure 1 As shown in Figure 3, when brake pedal 1 is depressed, brake pedal arm 1 drives pedal force simulator push rod 4 and pedal force simulator piston 27 to move. Pedal force simulator piston 27 compresses hydraulic oil through main brake oil pipe 30 to brake actuator adjustment chamber 19. The hydraulic oil pushes brake actuator piston 16 to move, driving brake actuator push rod 14, which in turn activates brake booster 13, producing braking. During this process, brake actuator piston 16 compresses brake actuator piston return spring 15, pedal force simulator piston 27 compresses pedal force simulator piston return spring 26, and pedal force regulator piston 33 compresses pedal force regulator piston return spring 24. Pedal force regulator 45 operates, achieving pedal force regulation.

[0050] When the brake pedal 1 is released, the pedal force simulator piston return spring 26 pushes the pedal force simulator piston 27 to reset, and the pedal force simulator piston 27 pushes the pedal force simulator push rod 4 and the brake pedal 1 to reset. At the same time, the brake driver piston return spring 15 pushes the brake driver piston 16 to reset, and the brake driver piston 16 pulls the brake driver push rod 14 back to its original position, canceling the brake. During this process, the pedal force regulator piston return spring 24 pushes the pedal force regulator piston 33 to reset, to a certain extent assisting the pedal force simulator piston 27 in returning to its original position; at the same time, the hydraulic oil is pushed into the pedal force simulator adjustment chamber 6 by the brake driver piston 16. The specific steps are as follows:

[0051] Step 1: To obtain a better brake pedal operating experience, the pedal force needs to be adjusted. The pedal force regulator adjusts the pressure P in the chamber 22. 22 It reflects the size of the pedal force. Set the regulator pressure P in advance. 22 The target value is P purposeThe displacement signal of the brake pedal 1 being stepped on is set as t+, and the displacement signal of the brake pedal 1 returning to its original position is set as t-. Considering that the hydraulic oil will have a certain loss during use, the pressure P6 of the pedal force simulator regulating chamber 6 will fluctuate within a certain range, and the minimum values ​​are set as P 6min .P 6min 、P purpose It can be calibrated according to different vehicle models.

[0052] Step 2: The brake pedal 1 is actuated to generate a displacement signal.

[0053] Step 3.1: The ECU 12 controls the three-way solenoid valve 38 to operate according to the value of P6.

[0054] Step 3.1.1: When P6 ≥ P 6min When , the port b of the three-way solenoid valve 38 is opened, the port c is closed, the fluid replenishing valve 42 is opened, and the main brake oil pipe 30 is in normal working state;

[0055] Step 3.1.2: When P6<P 6min If the pressure in the brake actuator regulating chamber 19 increases, the oil pump 10 (which can be an electric vacuum pump) will increase the pressure. 19 When the threshold is reached, the oil pump 10 stops working. 19 The threshold is calibrated according to different vehicle models.

[0056] Step 3.2: The pedal force simulator piston displacement sensor 7 inputs the displacement signal of the brake pedal 1 to the ECU 12 .

[0057] Step 4.1: When the signal is t+, the ECU 12 calculates ΔP=P 22 -P purpose ;

[0058] Step 4.2: When the signal is t-, the ECU 12 does not issue any command and takes no action.

[0059] Step 5.1: When ΔP < 0, the ECU 12 instructs the oil pump 10 to pump oil into the pedal force regulator regulating chamber 22 to increase the pressure, thereby achieving pedal force regulation, and then returns to step 4.1;

[0060] Step 5.2: When ΔP>0, the ECU 12 instructs the oil pump 10 to pump the oil out of the regulator regulating chamber 22 to reduce the pressure, thereby achieving pedal force regulation, and returns to step 4.1;

[0061] Step 5.3: When ΔP=0, the oil pump 10 stops and the operation ends.

[0062] The present invention connects the brake pedal 1 and brake booster 13 and transmits braking force through an oil pipe, significantly reducing the space occupied by the brake system. It eliminates the need for automatic air conditioning, dashboards, and other components to avoid the need for the brake system to be retracted, facilitating design and significantly improving component versatility. The drive mechanism of the present invention is purely hydraulic, utilizing the same hydraulic oil as the entire vehicle's brake system. Because hydraulic oil is essentially incompressible, there is no risk of delayed braking force transmission or reduced braking efficiency. The present invention not only provides a technical solution and control method for adjustable brake pedal force, improving operator comfort, but also provides a method for controlling hydraulic oil circuit failures to prevent braking accidents. The pedal force simulator 43 and brake actuator 44 are located in the passenger compartment. The oil pump 10 and brake booster 13 are located in the engine compartment, and the brake booster 13 can accommodate both left-hand and right-hand drive vehicles. The oil tank 11 can be the same as the vehicle's brake system's or a separate tank. The ECU 12 can be integrated into the vehicle's controller or installed independently. In addition to the aforementioned solutions, fluid replenishment of the main brake oil pipe 30 can also be automated. The brake actuator push rod 14 of the present invention can be a single connecting rod or a two-section connecting rod structure, where one section of the connecting rod is completely the same as the push rod of the brake booster 13, and the other section of the connecting rod is fixed to the pedal force simulator piston 27. The sensors of the present invention can be selectively fixed to the cylinder or the pipeline, as long as they can collect accurate signals. Figure 1 —2 The pedal force simulator 43, brake driver 44 and pedal force regulator 45 only reflect the schematic diagram of the connection with the oil pipe and sensor, and do not represent the final design scheme. In the actual design process, they can be adjusted appropriately as needed. The oil pipe and sensor can be designed at any position in the system as long as the relevant functions can be achieved. A deceleration device can also be added to the structure of the pedal force simulator 43 of the present invention. In the present invention, the piston stroke, spring stiffness and piston diameter need to be comprehensively considered in the various vehicle models to determine the appropriate range to achieve universality for multiple vehicle models. At the same time, the pedal force regulator adjusts the target pressure value P of the chamber 22. purpose It can be calibrated according to different vehicle models.

[0063] In summary, this invention, through innovative hydraulic transmission, modular design, and intelligent control, addresses core issues of right-hand-drive vehicle braking systems, including space occupation, inefficiency, and responsiveness, without altering the engine compartment layout. It also ensures pedal force adjustability and fail-safe operation. This technical solution significantly reduces R&D costs, improves braking performance and reliability, and provides a practical solution for the efficient development of right-hand-drive vehicles, with high engineering application value.

[0064] It should be noted that the description of the above technical solutions is illustrative only. This specification may be embodied in various forms and should not be construed as limiting the technical solutions set forth herein. Rather, these descriptions are provided so that the disclosure of the present invention will be thorough and complete and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solutions of the present invention are limited only by the scope of the claims. Where the terms "including," "having," and "comprising" are used in this specification, further parts or other components may also be included. The terms used may generally be singular but may also represent the plural. It should be noted that although the terms "first," "second," "top," "bottom," "one side," "other side," "end," and "other end" may appear and be used in this specification to describe various components, these components and parts should not be limited by these terms. These terms are used solely to distinguish one component or part from another. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component, without departing from the scope of this specification. Top and bottom components may also be interchanged or switched under certain circumstances; components at one end and at the other end may have the same or different properties.

[0065] Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments and is susceptible to numerous variations. Any simple modifications, equivalent variations, and modifications to the above embodiments based on the technical essence of the present invention shall be deemed to fall within the scope of protection of the present invention.

Claims

1. A brake connection device comprising a pedal force simulator (43) and a brake actuator (44), characterized in that: A main brake oil pipe (30) is connected between the pedal force simulator (43) and the brake driver (44); a pedal force regulator (45) is coaxially fixed inside the pedal force simulator (43); the pedal force simulator (43) and the pedal force regulator (45) are both piston structures; the piston of the pedal force simulator (43) and the piston of the pedal force regulator (45) are coaxially linked structures; the pedal force regulator (45) and the brake driver (44) are respectively connected to an oil storage and oil pumping mechanism via a regulator oil pipe (31) and a backup brake oil pipe (40); The hydraulic oil in the pedal force simulator (43) can be input into the brake driver (44) through the main brake oil pipe (30) to generate a brake driving force for braking; the oil storage and oil pumping mechanism can pump the hydraulic oil into or out of the pedal force regulator (45) through the regulator oil pipe (31) to adjust the oil pressure in the pedal force regulator (45) and thus adjust the pedal force; the oil storage and oil pumping mechanism can directly pump the hydraulic oil into the brake driver (44) through the backup brake oil pipe (40) to generate a brake driving force, thereby avoiding the failure of the main brake oil pipe (30) to generate a driving force through the brake driver (44), resulting in a brake failure.

2. The brake connection device according to claim 1, characterized in that: The pedal force simulator (43) includes a pedal force simulator cylinder (5) with a cavity inside, a pedal force simulator piston (27) is coaxially arranged inside the pedal force simulator cylinder (5), a pedal force simulator piston return spring (26) is fixedly connected between the inner surface of one end of the pedal force simulator cylinder (5) and the pedal force simulator piston (27), and a pedal force simulator push rod (4) with an end passing through the other end of the pedal force simulator cylinder (5) is coaxially fixedly connected to the pedal force simulator piston (27); the pedal force regulator (45) is coaxially fixed to the inner surface of one end of the pedal force simulator cylinder (5).

3. The brake connection device according to claim 2, characterized in that: The pedal force regulator (45) includes a pedal force regulator cylinder (23) coaxially fixed on the inner surface of one end of the pedal force simulator cylinder (5) and having a cavity inside. A pedal force regulator piston (33) is coaxially arranged inside the pedal force regulator cylinder (23). A pedal force regulator piston return spring (24) is fixedly connected between the inner surface of one end of the pedal force regulator cylinder (23) and the pedal force regulator piston (33). The pedal force regulator piston (33) and the pedal force simulator piston (27) are directly or indirectly coaxially fixed to form the coaxial linkage structure.

4. The brake connection device according to claim 1, wherein: The brake driver (44) includes a brake driver cylinder (20) with a cavity inside, a brake driver piston (16) is coaxially arranged inside the brake driver cylinder (20), a brake driver piston return spring (15) is fixedly connected between the inner surface of one end of the brake driver cylinder (20) and the brake driver piston (16), and a brake driver push rod (14) with an end passing through the brake driver cylinder (20) is coaxially fixedly connected to the brake driver piston (16), and the brake driving force generated by the brake driver (44) can be output to the outside through the brake driver push rod (14).

5. The brake connection device according to claim 1, characterized in that: The oil storage and pumping mechanism comprises an oil tank (11), an oil pump (10) connected to the oil tank (11) via a pipeline, and a three-way solenoid valve (38) having an interface connected to the oil pump (10) via a pipeline, wherein the other two interfaces of the three-way solenoid valve are respectively connected to the regulator oil pipe (31) and the backup brake oil pipe (40), and the oil storage and pumping mechanism can be selectively connected to the regulator oil pipe (31) or the backup brake oil pipe (40) through the three-way solenoid valve (38).

6. A connection structure of a brake connection device according to any one of claims 1 to 5, comprising a pedal mechanism and a brake mechanism, characterized in that: A first linkage push-pushing structure is connected between the power output end of the pedal mechanism and the piston of the pedal force simulator (43), and a second linkage push-pushing structure is connected between the power output end of the brake driver (44) and the brake mechanism.

7. The connection structure of the brake connection device according to claim 6, characterized in that: The pedal mechanism includes a brake pedal arm (2), and the brake mechanism includes a brake booster (13); the first linkage push structure includes a pedal ball cage structure (8) fixed to the brake pedal arm (2) and a pedal force simulator push rod (4) with one end fixedly connected to the piston of the pedal force simulator (43) and the other end hingedly connected to the pedal ball cage structure (8); the second linkage push structure includes a brake driver push rod (14) fixedly connected between the piston of the brake driver (44) and the brake booster (13).

8. A method for operating the connection structure of the brake connection device according to claim 6 or 7, characterized in that: It includes a conventional working method when the regulator oil pipe (31) is not failed, a pedal force adjustment method, and a failure control method when the regulator oil pipe (31) fails; The conventional working method includes: the pedal mechanism drives the piston of the pedal force simulator (43) through the first linkage push structure, the hydraulic oil in the pedal force simulator (43) is input into the brake driver (44) through the main brake oil pipe (30), the piston of the brake driver (44) is driven to move, and the brake mechanism is driven to move through the second linkage push structure; The pedal force regulating method comprises: pumping the hydraulic oil of the oil storage and pumping mechanism into or out of the pedal force regulator (45) through the regulator oil pipe (31); The failure control method comprises: directly pumping the hydraulic oil of the oil storage and pumping mechanism into the brake driver (44) through the backup brake oil pipe (40).

9. The operating method of the connection structure of the brake connection device according to claim 8, characterized in that: The pedal force regulating method further comprises: monitoring the hydraulic oil pressure inside the pedal force regulator (45), setting a preferred value or preferred range of the hydraulic oil pressure inside the pedal force regulator (45), and comparing the hydraulic oil pressure inside the pedal force regulator (45) with the preferred value or preferred range of the hydraulic oil pressure inside the pedal force regulator (45); if the hydraulic oil pressure inside the pedal force regulator (45) is greater than the preferred value or preferred range of the hydraulic oil pressure inside the pedal force regulator (45), then adjusting the hydraulic oil pressure inside the pedal force regulator (45) to the preferred value or preferred range of the hydraulic oil pressure inside the pedal force regulator (45). The hydraulic oil is pumped out to the oil storage and oil pumping mechanism; if the hydraulic oil pressure inside the pedal force regulator (45) is less than the preferred value or preferred range of the hydraulic oil pressure inside the pedal force regulator (45), the hydraulic oil of the oil storage and oil pumping mechanism is pumped into the pedal force regulator (45); if the hydraulic oil pressure inside the pedal force regulator (45) is equal to the preferred value of the hydraulic oil pressure inside the pedal force regulator (45) or is within the preferred range, the hydraulic oil inside the pedal force regulator (45) is not pumped in or out.

10. The operating method of the connection structure of the brake connection device according to claim 8, characterized in that: The failure control method further includes: monitoring the hydraulic oil pressure inside the pedal force simulator (43) and the hydraulic oil pressure inside the brake driver (44), setting a minimum value of the hydraulic oil pressure inside the pedal force simulator (43) and a threshold value of the hydraulic oil pressure inside the brake driver (44), and comparing the hydraulic oil pressure inside the pedal force simulator (43) with the minimum value of the hydraulic oil pressure inside the pedal force simulator (43); if the hydraulic oil pressure inside the pedal force simulator (43) is less than the minimum value of the hydraulic oil pressure inside the pedal force simulator (43), the oil storage and pumping mechanism directly pumps the hydraulic oil into the brake driver (44) through the backup brake oil pipe (40) until the hydraulic oil pressure inside the brake driver (44) reaches the threshold value of the hydraulic oil pressure inside the brake driver (44).

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