Vehicle pedal feel simulator assembly and braking system

Abstract

A vehicle pedal feel simulator assembly. The vehicle pedal feel simulator assembly comprises a valve block (1), wherein the valve block (1) is provided with a simulator chamber (200); a simulator (100) is disposed in the simulator chamber (200); the simulator (100) comprises a piston (4) and a simulator housing (11); the simulator housing (11) is connected to the valve block (1); the piston (4) is connected to the simulator housing (11) via an elastic mechanism; the piston (4) is disposed within the simulator chamber (200); the elastic mechanism comprises a spring mechanism and a washer mechanism; the washer mechanism is connected to the piston (4) via the spring mechanism; the spring mechanism comprises a second spring mechanism (7), and the second spring mechanism (7) is a multi-stiffness spring. Through the coordinated use of the spring mechanism and the washer mechanism, the present invention can ensure consistency in pedal travel and pedal force after temperature variations, while mitigating unevenness caused by the inflection point of pedal force, thereby improving driving comfort. Further provided is a braking system.

Description

Pedal feel simulator assembly for vehicle and brake system TECHNICAL FIELD

[0001] The present application relates to the field of brake system, in particular to a pedal feel simulator assembly for vehicle and a brake system comprising the same. BACKGROUND

[0002] "Safe, energy-saving, and environment-friendly" are three major themes for the future development of automobiles, and the brake system, as an important part of an automobile, directly affects the safety of the automobile.

[0003] With the development of modern technology, and the increasing demand of consumers for the safety performance of automobiles, automobile braking has also been continuously developed.

[0004] The brake system is an important guarantee for the safety of automobile driving, and most of the current automobiles use vacuum assisted brake systems, and the vacuum assist source generates negative pressure by the engine or an electric vacuum pump.

[0005] With the development of automobile active safety technology and the increasing popularity of hybrid and pure electric vehicles, the traditional brake system cannot meet the functional requirements of new automobile technologies such as AEB and regenerative braking energy recovery. Compared with the traditional brake system, the brake-by-wire technology has the advantages of simple structure, fast braking response, high control precision, flexible arrangement, consistent pedal characteristics, and easy integration with automobile dynamic control systems, and can meet the regenerative braking system requirements of electric vehicles and hybrid vehicles, and has good development prospects.

[0006] However, the electric brake-by-wire system cancels the direct connection between the brake pedal and the brake wheel cylinder, and must use a specific device to simulate the brake pedal feel. During braking, the brake pedal stroke simulator provides a pedal reaction force for the driver, so that the driver has a good brake pedal feel, and the driver adjusts the stroke of the brake pedal in real time according to the pedal reaction force to ensure the safety of braking.

[0007] Although the existing pedal simulator can achieve the above effects in theory, the force generated by the elastic material used in the existing pedal simulator changes due to changes in temperature during movement, especially in low temperature environments, the force value changes more obviously, which changes the pedal feel of the vehicle.

[0008] For example, the pedal simulator disclosed in CN103818361A.

[0009] At the same time, the transition between the elastic members in the existing pedal simulator is prone to inflection points, which affects the smoothness during the stepping process.

[0010] Therefore, in order to improve or solve at least one of the above problems, the existing simulator structure needs to be optimized. SUMMARY

[0011] The application aims to provide a pedal feeling simulator with good pedal flatness sequence.

[0012] In order to achieve the above-mentioned purpose, the technical scheme adopted by the application is:

[0013] A pedal feeling simulator assembly for vehicle, comprising a valve block, wherein an simulator cavity is arranged on the valve block; an simulator is arranged in the simulator cavity;

[0014] The simulator comprises a piston and a simulator housing;

[0015] The simulator housing is connected to the valve block;

[0016] The piston is connected to the simulator housing through an elastic mechanism;

[0017] The piston is arranged in the simulator cavity;

[0018] The elastic mechanism comprises a spring mechanism and a gasket mechanism; the gasket mechanism is connected to the piston through the spring mechanism;

[0019] The spring mechanism comprises a second spring mechanism, and the second spring mechanism is a multi-rigidity spring.

[0020] The spring mechanism comprises a first spring mechanism, the gasket mechanism is connected to the first spring mechanism through the second spring mechanism, and the second spring mechanism is connected to the piston through the first spring mechanism.

[0021] The gasket mechanism comprises a first disc mechanism and a second disc mechanism; the second disc mechanism is connected to the spring mechanism through the first disc mechanism.

[0022] The rigidity of the first spring mechanism, the second spring mechanism, the first disc mechanism and the second disc mechanism increases in turn.

[0023] A sealing element is arranged between the piston and the valve block.

[0024] An embedded ring groove is arranged on the inner wall of the simulator cavity of the valve block; the sealing element is arranged in the embedded ring groove.

[0025] An simulator sleeve is arranged on the simulator housing; the simulator housing is connected to the valve block through the simulator sleeve.

[0026] A disc limiting seat is arranged on the inner wall of the simulator housing.

[0027] The second spring mechanism is connected with the first spring mechanism through an upper spring seat, and is connected with the washer mechanism through a lower spring seat.

[0028] The valve block is further provided with a master cylinder front cavity, the master cylinder front cavity is connected with a brake pedal through an input rod, and the master cylinder front cavity is in communication with the simulator cavity.

[0029] Preferably, the disc limiting seat is arranged at the arrangement position of the first disc mechanism.

[0030] Preferably, the second spring mechanism is a multi-rigidity metal cylindrical spring.

[0031] Preferably, the first disc mechanism and the second disc mechanism are disc springs.

[0032] Preferably, the piston comprises a piston body, the piston body is provided with a placing groove, and the elastic mechanism is arranged in the placing groove.

[0033] Preferably, the inner cavity of the simulator shell is a stepped counterbore, and the whole is in a structure of large at the top and small at the bottom, and the piston is provided with a stepped shaft.

[0034] Another aspect of the present application further provides a vehicle braking system, which comprises the pedal feeling simulator assembly described above.

[0035] The present application has the following advantages:

[0036] The present application discloses a novel pedal feeling simulator assembly for vehicles and a braking system comprising the same. BRIEF DESCRIPTION OF DRAWINGS

[0037] The following is a brief description of the content expressed by each drawing of the present application and the marks in the drawings:

[0038] Fig. 1 is a structural schematic view of the pedal feeling simulator assembly for vehicles of the present application.

[0039] Fig. 2 is a structural schematic view of the simulator in the present application.

[0040] The marks in the above drawings are as follows:

[0041] 1、valve block, 2, seal, 3, simulator sleeve, 4, piston, 5, first spring mechanism, 6, upper limit seat, 7, second spring mechanism, 8, lower limit seat, 9, first disc mechanism, 10, second disc mechanism, 11, simulator shell, 12, disc spring limit seat, 21, embedded ring groove, 41, piston body, 42, placed groove, 43, inner protrusion, 44, outer protrusion, 45, guide ring rib, 100, simulator, 200, simulator cavity, 300, main cylinder front cavity, 400, input rod, 500, brake pedal. DETAILED DESCRIPTION

[0042] The specific embodiments of the present application will be further described in detail below with reference to the drawings.

[0043] A pedal feeling simulator assembly for vehicle, including valve block 1, the valve block 1 is equipped with simulator cavity 200;Simulator cavity 200 is equipped with simulator 100;The simulator 100 includes piston 4 and simulator shell 11;The simulator shell 11 is connected on valve block 1;The piston 4 is connected with simulator shell 11 through elastic mechanism;The piston 4 is arranged in simulator cavity 200;The elastic mechanism includes spring mechanism and washer mechanism;The washer mechanism is connected with piston 4 through spring mechanism;The present application discloses a novel pedal feeling simulator assembly for vehicle;The present application can guarantee the consistency of pedal stroke and pedal force after temperature change by the cooperation of spring mechanism and washer mechanism, and at the same time, the unevenness caused by pedal force inflection point is optimized, and the driving comfort is improved.

[0044] The pedal feeling simulator assembly for vehicle disclosed by the present application is mainly used in brake system.

[0045] Specifically, the vehicle pedal feeling simulator assembly disclosed in the present application mainly comprises a valve block 1, the valve block 1 is the main body structure of the simulator assembly, and is convenient for subsequent connection with the brake pedal 500; meanwhile, the subsequent simulator 100 is also conveniently arranged and placed; in addition, the valve block 1 is provided with a simulator cavity 200 in the present application; the simulator cavity 200 is used for arranging and placing the simulator 100, and the simulator 100 is arranged in the simulator cavity 200; the simulator 100 is mainly used for providing pedal feeling feedback for the driver; in actual design, the simulator 100 comprises a piston 4 and a simulator shell 11; the piston 4 plays a pushing role, similar to the piston 4 in a traditional syringe; and the simulator shell 11 is mainly convenient for arranging and placing the elastic mechanism and the piston 4, and the simulator shell 11 is connected to the valve block 1 in actual connection; the simulator shell 11 is hollow inside, which is convenient for placing the elastic mechanism and the piston 4; in addition, the piston 4 is connected to the simulator shell 11 through an elastic mechanism in the present application; the setting of the elastic mechanism facilitates the force generated by the elastic mechanism to be transmitted to the driver's foot, thereby generating pedal stroke and pedal force.

[0046] The piston 4 is arranged in the simulator cavity 200; the elastic mechanism is connected to the piston 4, and the elastic mechanism comprises a spring mechanism and a gasket mechanism; the gasket mechanism is connected to the piston 4 through the spring mechanism; based on such a setting, it can be known that the elastic mechanism disclosed in the present application adopts a plurality of elastic members arranged in series, and each elastic member is required to be a metal member, which can ensure the consistency of the pedal stroke and the pedal force after temperature change.

[0047] Meanwhile, the spring mechanism comprises a second spring mechanism 7 in the present application, the second spring mechanism 7 is a multi-rigidity spring; specifically, it is a multi-rigidity cylindrical spring, that is, a multi-rigidity spiral spring; of course, other spring structures can also be selected during implementation; the force value in the linear segment stroke of the pedal simulator 100 is provided by the multi-rigidity metal cylindrical spring, which ensures that the pedal force curve is smooth and has no inflection point.

[0048] Further, the spring mechanism comprises a first spring mechanism 5 and a second spring mechanism 7 in the present application, the gasket mechanism is connected to the first spring mechanism 5 through the second spring mechanism 7, and the second spring mechanism 7 is connected to the piston 4 through the first spring mechanism 5; in actual connection, the cooperation of the two groups of spring structures is conducive to better guaranteeing the smoothness of the pedal stroke and the pedal force curve; and improving the smoothness in the pedaling process.

[0049] The present application provides stable pedal force values for the rear section of the pedal stroke by providing a gasket mechanism, specifically, the gasket mechanism includes a first disc mechanism 9 and a second disc mechanism 10; the second disc mechanism 10 is connected to the spring mechanism through the first disc mechanism 9; based on such a setting, the connection between the components in the elastic mechanism is facilitated; at the same time, the stiffness of the first spring mechanism 5, the second spring mechanism 7, the first disc mechanism 9 and the second disc mechanism 10 in the present application increases in turn; based on such a setting, the travel and pedal force value curve of the brake pedal 500 is smoother, and the smoothness during the pedaling process is improved.

[0050] At the same time, the elastic components in the present application mainly include the first spring mechanism 5, the second spring mechanism 7, the first disc mechanism 9 and the second disc mechanism 10; and the four elastic components are connected in turn; at the same time, the stiffness increases in turn; the first spring mechanism 5 and the second spring mechanism 7 are mainly helical springs; the main difference is the size and stiffness; while the first disc mechanism 9 and the second disc mechanism 10 are mainly disc spring structures, the main difference between the two is the stiffness; based on the above design, the elastic components disclosed in the present application have multiple implementation schemes.

[0051] Implementation scheme one:

[0052] Single use of the second spring mechanism 7 can ensure the smoothness of the travel and pedal force value curve of the brake pedal 500 by controlling the stiffness of the second spring mechanism 7, which meets the design requirements; at the same time, the types and number of parts are reduced, and the subsequent assembly efficiency and accuracy are improved.

[0053] Implementation scheme two:

[0054] Use of the combination of the first spring mechanism 5 and the second spring mechanism 7;

[0055] Through the cooperation of the two elastic components, the manufacturing precision of a single elastic component can be reduced, and the smoothness of the pedal travel and pedal force value curve can be optimized.

[0056] Implementation scheme three:

[0057] Use of the second spring mechanism 7 and the gasket mechanism;

[0058] Through the combination of the second spring mechanism 7 and the gasket mechanism, the longitudinal height of the simulator 100 can be reduced while ensuring sufficient stiffness due to the characteristics of the gasket mechanism, which is beneficial to reducing the longitudinal height of the simulator 100 while ensuring the use effect of the simulator 100, facilitating subsequent arrangement.

[0059] Meanwhile, when the third embodiment is used, the number of disc springs in the gasket mechanism can be selected according to requirements, and the curve of the stroke and pedal force value of the pedal can be optimized by the combination of different numbers of disc springs, so that the curve smoothness is more in line with the design requirements.

[0060] The fourth embodiment is as follows:

[0061] The first spring mechanism 5, the second spring mechanism 7, the first disc mechanism 9 and the second disc mechanism 10 in the elastic mechanism are used simultaneously.

[0062] Based on the cooperation of the above-mentioned elastic members, the pedal force curve can be better ensured to be smooth without inflection points, and more in line with the actual customer requirements.

[0063] Meanwhile, in the present application, the rigidity of the second spring mechanism 7 is required to be at least more than 2.

[0064] Further, in the present application, the sealing member 2 is arranged between the piston 4 and the valve block 1.

[0065] Meanwhile, in the present application, the simulator cavity 200 of the valve block 1 is provided with an embedded ring groove 21, and the sealing member 2 is arranged in the embedded ring groove 21.

[0066] Further, in the present application, the simulator housing 11 is provided with a simulator sleeve 3, and the simulator housing 11 is connected with the valve block 1 through the simulator sleeve 3.

[0067] Meanwhile, in the present application, the inner wall of the simulator housing 11 is provided with a disc limiting seat 12.

[0068] Further, in the application, the second spring mechanism 7 is connected with the first spring mechanism 5 through the upper spring seat 6, and the second spring mechanism 7 is connected with the washer mechanism through the lower spring seat 8; through the design of the upper spring seat 6 and the lower spring seat 8, the arrangement and placement of the first spring mechanism 5 and the second spring mechanism 7 are facilitated.

[0069] Meanwhile, in the application, the valve block 1 is further provided with a master cylinder front cavity 300; the master cylinder front cavity 300 is connected with a brake pedal 500 through an input rod 400; the master cylinder front cavity 300 is in communication with the simulator cavity 200; when the driver takes a brake, steps on the brake pedal 500, brake master cylinder oil enters the simulator 100, and pedal feeling simulation is realized.

[0070] The application cooperates multiple elastic members, and mainly uses a multiple-rigidity metal cylindrical spring, so that the stroke and force value curve is close to the calibrated brake pedal 500 force-brake pedal 500 stroke curve as much as possible, so that the driver's braking feeling can be optimized; the brake foot feeling is smoother, presents linear change, and the braking comfort is good.

[0071] Meanwhile, in the application, the piston 4 comprises a piston body 41, and a placing sink 42 is arranged on the piston body 41; the placing sink 42 is arranged to facilitate the placement of the elastic mechanism in the piston 4; meanwhile, in actual design, the placing sink 42 is in a sink structure on the piston body 41; such an arrangement forms a cavity in the piston 4, thereby facilitating the insertion and placement of one end of the elastic mechanism.

[0072] Meanwhile, as a preferred option, the placing sink 42 is a conical frustum type groove, that is, a structure with one end large and the other end small; the larger one end of the placing sink 42 is arranged close to the washer mechanism; such an arrangement facilitates the assembly of the elastic mechanism in the piston 4 in subsequent assembly.

[0073] In addition, a guide ring rib 45 is arranged on the outer side of the piston 4; the guide ring rib 45 is attached to the inner wall of the simulator shell 11, plays a good motion guiding role, ensures the linearity of the motion of the piston 4, and avoids the deviation of the piston 4 during the motion.

[0074] Meanwhile, an outer protrusion 44 is arranged on the side of the piston body 41 away from the elastic mechanism; an inner protrusion 43 is arranged on the inner side of the piston body 41; the application arranges the outer protrusion 44, so that the top of the piston 4 can have a gap with the inside of the simulator cavity 200, thereby facilitating the entry of oil into the simulator cavity 200 for pushing the piston 4 to move.

[0075] The arrangement of the inner protrusion 43 facilitates the upper end position limitation of the first spring mechanism 5, acts as a spring seat structure, and avoids the horizontal deviation of the first spring mechanism 5.

[0076] Specifically

[0077] The application discloses a vehicle pedal feeling simulator 100, mainly comprising a piston 4, a first spring mechanism 5, a second spring mechanism 7, a first disc mechanism 9 and a second disc mechanism 10.

[0078] In actual design, the first spring mechanism 5 mainly comprises a simulator small spring, the second spring mechanism 7 mainly comprises a simulator large spring, the first disc mechanism 9 comprises an upper disc spring, the second disc mechanism 10 comprises a lower disc spring, and the piston 4, the first spring mechanism 5, the second spring mechanism 7, the first disc mechanism 9 and the second disc mechanism 10 are arranged in a simulator shell 11, and the simulator shell 11 is fixedly connected with the valve block 1.

[0079] In the application, the elastic mechanism comprises the first spring mechanism 5, the second spring mechanism 7, the first disc mechanism 9 and the second disc mechanism 10, and the elastic members are arranged in series, and the spring stiffness gradually increases from top to bottom.

[0080] The basic working process is as follows: the simulator 100 is connected with a simulator cavity 200 of the valve block 1 through a simulator screw sleeve 3, the cavity is communicated with a master cylinder cavity on the valve block 1, and the master cylinder cavity is connected with a brake pedal 500 through an input rod 400.

[0081] When the driver steps on the brake pedal 500, the master cylinder cavity discharges brake fluid to the simulator cavity 200.

[0082] The simulator piston 4 is driven by the pressure of the brake fluid to sequentially drive the first spring mechanism 5, the second spring mechanism 7, the first disc mechanism 9 and the second disc mechanism 10 to move.

[0083] In order to ensure that the spring of the simulator 100 can reliably move for a long time, spring limiting seats need to be arranged for the springs. The force generated by the movement of the above springs is transmitted to the driver's foot, so as to generate a pedal stroke and a pedal force; the pedal feeling simulator 100 can be applied to a brake-by-wire system, and can be customized for the pedal stroke and the pedal force of a vehicle.

[0084] Specifically, the simulator 100 is connected with the simulator cavity 200 through the simulator screw sleeve 3, the simulator cavity 200 is directly connected with the front cavity 300 of the master cylinder on the valve block 1, and the front cavity 300 of the master cylinder is connected with the brake pedal 500 through the input rod 400; when the driver steps on the brake pedal 500, the brake fluid in the front cavity 300 of the master cylinder is discharged to the simulator cavity 200, and the piston 4 in the simulator cavity 200 moves linearly back and forth under the action of the hydraulic pressure; the simulator 100 comprises a simulator shell 11, and the simulator shell 11 is provided with an elastic mechanism, the elastic mechanism comprises a first spring mechanism 5, a second spring mechanism 7, a first disc mechanism 9 and a second disc mechanism 10; in the application, the first spring mechanism 5, the second spring mechanism 7, the first disc mechanism 9 and the second disc mechanism 10 are all metal elastic members, and the first spring mechanism 5, the second spring mechanism 7, the first disc mechanism 9 and the second disc mechanism 10 are arranged in series in the simulator shell 11 to provide support for the piston 4.

[0085] Meanwhile, in order to ensure the stepping effect, the spring in the second spring mechanism 7 is a multi-rigidity cylindrical spring in the application; meanwhile, the rigidity of the second spring mechanism 7 is required to be at least more than 2.

[0086] Meanwhile, a spring seat is required to be arranged in the application; the spring seat can be an upper spring seat 6 or a lower spring seat 8 due to different positions, the upper spring seat 6 is used for limiting the movement of the first spring mechanism 5, the lower spring seat 8 is used for limiting the movement of the second spring mechanism 7, and a disc spring limiting seat is arranged to limit the movement of the disc spring of the simulator 100.

[0087] Meanwhile, the inner cavity of the simulator shell 11 is a stepped counterbore, and the whole structure is large at the top and small at the bottom, and the piston 4 has a stepped shaft, so that the movement of the disc spring of the simulator 100 is limited by the simulator shell 11 and the piston 4.

[0088] The simulator shell 11 and the valve block 1 can be connected through the simulator screw sleeve 3, and the connection can also be achieved through the bolt and riveting mode.

[0089] The application further provides a vehicle braking system, which comprises the pedal feeling simulator assembly described above.

[0090] Based on the above design, the pedal feeling simulator assembly and the braking system disclosed by the application can ensure the consistency of the pedal stroke and the pedal force after the temperature changes, optimize the unevenness caused by the pedal force inflection point, and improve the driving comfort.

[0091] Obviously, the specific implementation of the application is not limited by the above mode, and various non-essential improvements made by adopting the method concept and technical scheme of the application are within the protection scope of the application.

Claims

1. A pedal feel simulator assembly for a vehicle, comprising: The valve block is provided with a simulator cavity; the simulator cavity is provided with a simulator; The simulator comprises a piston and a simulator shell; The simulator shell is connected to the valve block; The piston is connected to the simulator shell through an elastic mechanism; The piston is arranged in the simulator cavity; The elastic mechanism comprises a spring mechanism and a gasket mechanism; the gasket mechanism is connected to the piston through the spring mechanism; The spring mechanism comprises a second spring mechanism, which is a multi-rigidity spring.

2. A pedal feel simulator assembly for a vehicle as set forth in claim 1, characterized in that, The spring mechanism further comprises a first spring mechanism; the gasket mechanism is connected to the first spring mechanism through the second spring mechanism; the second spring mechanism is connected to the piston through the first spring mechanism.

3. A pedal feel simulator assembly for a vehicle as set forth in any of claims 1-2, characterized in that, The gasket mechanism comprises a first disc mechanism and a second disc mechanism; the second disc mechanism is connected to the spring mechanism through the first disc mechanism.

4. A pedal feel simulator assembly for a vehicle as set forth in claim 3, wherein The rigidity of the first spring mechanism, the second spring mechanism, the first disc mechanism and the second disc mechanism increases in sequence.

5. A pedal feel simulator assembly for a vehicle as defined in claim 1, wherein A sealing element is arranged between the piston and the valve block.

6. A pedal feel simulator assembly for a vehicle as defined in claim 5, wherein An embedded ring groove is arranged on the inner wall of the simulator cavity of the valve block; the sealing element is arranged in the embedded ring groove.

7. A pedal feel simulator assembly for a vehicle as defined in claim 1, wherein A simulator sleeve is arranged on the simulator shell; the simulator shell is connected to the valve block through the simulator sleeve.

8. A pedal feel simulator assembly for a vehicle as set forth in claim 3, wherein A disc limiting seat is arranged on the inner wall of the simulator shell.

9. A pedal feel simulator assembly for a vehicle as set forth in claim 4, wherein, The second spring mechanism is connected to the first spring mechanism through an upper spring seat; the second spring mechanism is connected to the gasket mechanism through a lower spring seat.

10. A pedal feel simulator assembly for a vehicle as set forth in claim 1, characterized in that, The valve block is further provided with a master cylinder front cavity; the master cylinder front cavity is connected to a brake pedal through an input rod; the master cylinder front cavity is in communication with the simulator cavity.

11. A pedal feel simulator assembly for a vehicle as set forth in claim 8, wherein, The disc limiting seat is arranged at the arrangement position of the first disc mechanism.

12. A pedal feel simulator assembly for a vehicle as defined in claim 1, wherein The second spring mechanism is a multi-rigidity metal cylindrical spring.

13. A pedal feel simulator assembly for a vehicle as set forth in claim 3, wherein The first disc mechanism and the second disc mechanism are disc springs.

14. A pedal feel simulator assembly for a vehicle as defined in claim 1, wherein The piston comprises a piston body, which is provided with a placing sink; the elastic mechanism is arranged in the placing sink.

15. A pedal feel simulator assembly for a vehicle as defined in claim 1, wherein, The inner cavity of the simulator shell is a stepped counterbore, which has an overall structure of large at the top and small at the bottom; the piston is provided with a stepped shaft.

16. A vehicle braking system comprising the pedal feel simulator assembly according to any one of claims 1-15.

Images