Brake pedal by wire
The brake pedal unit addresses the need for a compact and cost-efficient design by incorporating a reset unit with a first and second reset lever and elements, achieving a linear or exponential reset curve with hysteresis for efficient vehicle deceleration control and providing multiple power modes through a force module unit.
Patent Information
- Application Number
- PCT/CN2024/132220
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-12-19
- Filing Date
- 2024-11-15
- Publication Date
- 2025-06-26
AI Technical Summary
Existing brake pedal systems lack a compact and cost-efficient design that provides a linear or exponential reset curve with hysteresis, which is essential for efficient vehicle deceleration control.
The proposed brake pedal unit includes a base portion, a pedal element, and a reset unit that generates a reset force. The reset unit consists of a first reset lever, one or more reset elements, and a second reset lever, which work together to provide a reset force that increases linearly or exponentially based on the pedal element's position, while maintaining a compact design.
The brake pedal unit achieves a linear or exponential reset curve with hysteresis, ensuring efficient vehicle deceleration control while maintaining a compact and cost-efficient design. Additionally, the force module unit can generate a force offset to provide multiple power modes, enhancing operational flexibility.
Smart Images

Figure CN2024132220_26062025_PF_FP_ABST
Abstract
Description
BRAKE PEDAL BY WIRE
[0001] PRIORITY CLAIM
[0002] The present application is based on and claims priority to United States Provisional Application 63 / 612, 047 having a filing date of December 19, 2023, which is incorporated by reference herein.FIELD
[0003] The present disclosure relates generally to a brake pedal, and more specifically to a Brake-by-Wire (BbW) brake pedal.BACKGROUND
[0004] Brake pedals may be used in automotive applications to control deceleration of the vehicle such as a passenger car, a truck, an agricultural vehicle, etc. Brake pedals are often actuated using a foot of a driver of the automobile to control deceleration of the vehicle.SUMMARY
[0005] Aspects and advantages of embodiments of the present disclosure will be set forth in part in the following description, or may be learned from the description, or may be learned through practice of the embodiments.
[0006] One example aspect of the present disclosure is directed to a brake pedal unit for a motor vehicle. The brake pedal unit includes a base portion. The brake pedal unit further includes a pedal element operable to be adjusted relative to the base portion during operation of the brake pedal unit, the pedal element operably coupled to the base portion via a coupling element. The brake pedal unit further includes a reset unit operable to generate a reset force on the pedal element. The reset unit includes a first reset lever operably coupled to the pedal element via a force transfer surface. The reset unit further includes one or more reset elements operable to generate the reset force when the pedal element is actuated.
[0007] Another example aspect of the present disclosure is directed to a brake pedal unit for a motor vehicle. The brake pedal unit includes a base portion. The brake pedal unit further includes a pedal element operable to be adjusted relative to the base portion during operation of the brake pedal unit, the pedal element operably coupled to the base portion via a coupling element. The brake pedal unit further includes a reset unit operable to generate a reset force on the pedal element. The reset unit includes a first reset lever operably coupled to the pedal element via a force transfer surface. The reset unit further includes a first reset element. The reset unit further includes a second reset element. The reset unit further includes a third reset element.
[0008] Another example aspect of the present disclosure is directed to a brake pedal unit for a motor vehicle. The brake pedal unit includes a base portion. The brake pedal unit further includes a pedal element operable to be adjusted relative to the base portion during operation of the brake pedal unit, the pedal element operably coupled to the base portion via a coupling element. The brake pedal unit further includes a reset unit operable to generate a reset force on the pedal element. The reset unit includes a first reset lever operably coupled to the pedal element via a force transfer surface. The reset unit further includes a second reset lever freely mounted to the coupling element. The reset unit further includes a first reset element operably coupled between the first reset lever and the base portion. The reset unit further includes a second reset element operably coupled between the second reset lever and the base portion. The reset unit further includes a third reset element operably coupled between the first reset lever and the second reset lever.
[0009] These and other features, aspects and advantages of various embodiments will become better understood with reference to the following description and appended claims. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the related principles.BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Detailed discussion of embodiments directed to one of ordinary skill in the art are set forth in the specification, which makes reference to the appended figures, in which:
[0011] FIG. 1 depicts a side view of an example brake pedal unit according to example embodiments of the present disclosure;
[0012] FIGs. 2A and 2B depict cross-sectional side views of an example coupling element according to example embodiments of the present disclosure;
[0013] FIG. 3 depicts a side view of another example brake pedal unit according to example embodiments of the present disclosure;
[0014] FIGs. 4A and 4B provide plots of example characteristic reset curves of the example brake pedal units according to example embodiments of the present disclosure;
[0015] FIG. 5 depicts a cross-sectional side view of a force module unit of a brake pedal unit according to example embodiments of the present disclosure; and
[0016] FIG. 6 provides an example force / path diagram of an example brake pedal unit according to example embodiments of the present disclosure.DETAILED DESCRIPTION
[0017] Reference now will be made in detail to embodiments, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation of the embodiments, not limitation of the present disclosure. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments without departing from the scope or spirit of the present disclosure. For instance, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Thus, it is intended that aspects of the present disclosure cover such modifications and variations. As used herein, the use of the term “about” in conjunction with a numerical value is intended to refer to within 10%of the numerical value.
[0018] Example aspects of the present disclosure relate generally to a brake pedal design for a vehicle. A brake pedal unit may include a base portion and a pedal element operable to be adjusted relative to the base portion during operation of the brake pedal unit. The pedal element may be operably coupled to the base portion via a coupling element. The brake pedal unit further includes a reset unit operable to generate a reset force on the pedal element. The reset force, as described herein, may be defined as the force acting against (e.g., contrary to) the force applied to the pedal element by, for instance, a foot of a user.
[0019] Aspects of the present disclosure provide multiple technical effects and benefits. For instance, the reset force provided by the brake pedal units of the present disclosure may provide for a linear or an exponential reset curve with hysteresis while maintaining a compact, cost-efficient design. In addition, aspects of the present disclosure provide for a force module unit operable to generate a force offset to the reset force. This may be used to provide multiple power modes such as a sport mode, a comfort mode, an off-road mode, etc. during operation of the vehicle.
[0020] Referring now to the figures, FIG. 1 provides a side view (e.g., cross-sectional side view) of an example brake pedal unit 100 according to example embodiments of the present disclosure.
[0021] Brake pedal unit 100 may include a base portion 110 and a pedal element 120. Pedal element 120 may be adjusted relative to base portion 110. For instance, pedal element 120 may be operably coupled to the base portion 110 via a coupling element 130. As such, pedal element 120 may be configured to execute a pivoting movement about coupling element 130.
[0022] Brake pedal unit 100 may further include a reset unit 140 operable to generate a reset force on the pedal element 120. The reset force provided by the reset unit 140 may be contrary to a force applied to the pedal element 120 by, for instance, a foot of a user. In addition, the reset force generated by the reset unit 140 may be configured to increase (e.g., linearly or exponentially increase) based on the position of the pedal element 120 relative to the base portion 110.
[0023] As shown in FIG. 1, reset unit 140 may include a reset lever 142. Reset lever 142 may be operably coupled to the pedal element 120. Specifically, reset lever 142 may be mounted against the pedal element 120 such that coupling element 130 (e.g., axle element) is clamped therebetween. For instance, coupling element 130 may have a first contact surface in contact with reset lever 142 and a second contact surface in contact with the pedal element 120. A force transfer surface may be arranged between reset lever 142 and the pedal element 120 such that the reset force acting on the pedal element 120 may be braced on the coupling element 130.
[0024] Reset unit 140 may further include one or more reset elements 150, 152, 154 operable to generate the reset force when the pedal element 120 is actuated. In some embodiments, reset elements 150, 152, 154 may be springs, such as conical springs. As shown, each reset element 150, 152, 154 may be operably coupled to base portion 110. Reset element 150 may be operably coupled between the pedal element 120 and the base portion 110, while reset elements 152, 154 may be operably coupled between the reset lever 142 and the base portion 110.
[0025] In some embodiments, reset element 152 and reset element 154 may be arranged in a parallel configuration (e.g., parallel spring configuration) as shown in FIG. 1. Alternatively, reset element 152 and reset element 154 may be arranged in a series configuration (e.g., series spring configuration) between the base portion 110 and the reset lever 142.
[0026] While brake pedal unit 100 is depicted in FIG. 1 with two reset elements 152, 154 operably coupled between the reset lever 142 and the base portion 110, those of ordinary skill in the art will understand that any suitable number of reset elements may be coupled to reset lever 142 and / or pedal element 120 without deviating from the scope of the present disclosure. For instance, in some embodiments, reset unit 140 may include a single reset element operably coupled between the reset lever 142 and the base portion 110 in addition to reset element 150 operably coupled between base portion 110 and pedal element 120.
[0027] In some embodiments, each reset element 150, 152, 154 may be spaced apart from the coupling element 130 by a different distance. For instance, first reset element 150 may be spaced apart from the coupling element 130 by a first distance 160, second reset element 152 may be spaced apart from the coupling element 130 by a second distance 162, and third reset element 154 may be spaced apart from the coupling element 130 by a third distance 164. As shown in FIG. 1, the first distance 160 may be greater than the second distance 162 and the third distance 164. In addition, the first reset element 150, the second reset element 152, and the third reset element 154 may all be positioned in the same direction relative to the coupling element 130, such that the first distance 160, second distance 162, and third distance 164 may all be measured along the same direction.
[0028] Referring now to FIGs. 2A and 2B, cross-sectional views of an example coupling element 130 according to example embodiments of the present disclosure. While coupling element 130 of FIGs. 2A and 2B is generally described with reference to brake pedal unit 100 of FIG. 1, those of ordinary skill in the art will understand that coupling element 130 described in FIGs. 2A and 2B may be implemented into any break pedal unit described herein.
[0029] As previously described with reference to FIG. 1, reset lever 142 may be operably coupled to the pedal element 120. As shown in FIGs. 2A and 2B, reset lever 142 may be operably coupled to the pedal element 120 via a force transfer surface 250. Specifically, reset lever 142 may be mounted against the pedal element 120 such that coupling element 130 (e.g., axle element, clutch element) is clamped therebetween. For instance, pedal element 120 and coupling element 130 may form a first contact surface 248. Similarly, reset lever 142 and coupling element 130 may form a second contact surface 252. As such, the coupling element 130 may be clamped between the pedal element 120 and the reset lever 142. A force transfer surface 250 may be arranged between reset lever 142 and the pedal element 120 such that the reset force acting on the pedal element 120 may be braced on the coupling element 130.
[0030] In some embodiments, the first contact surface 248 may have a different curvature than the second contact surface 252. Alternatively, the first contact surface 248 may have the same curvature as second contact surface 252.
[0031] Referring now to FIG. 3, another brake pedal unit 300 is provided according to example embodiments of the present disclosure.
[0032] Brake pedal unit 300 may include a base portion 310 and a pedal element 320. Pedal element 320 may be adjusted relative to base portion 310. For instance, pedal element 320 may be operably coupled to the base portion 310 via a coupling element 330. As such, pedal element 320 may be configured to execute a pivoting movement about coupling element 330.
[0033] Brake pedal unit 300 may further include a reset unit 305 operable to generate a reset force on the pedal element 320. The reset force provided by the reset unit 305 may be contrary to a force applied to the pedal element 320 by, for instance, a foot of a user. In addition, the reset force generated by the reset unit 305 may be configured to increase (e.g., linearly or exponentially increase) based on the position of the pedal element 320 relative to the base portion 310.
[0034] As shown in FIG. 3, Reset unit 305 may include a first reset lever 340. First reset lever 340 may be operably coupled to the pedal element 320. Specifically, first reset lever 340 may be mounted against the pedal element 320 such that coupling element 330 (e.g., axle element) is clamped therebetween. For instance, coupling element 330 may have a first contact surface in contact with first reset lever 340 and a second contact surface in contact with the pedal element 320. A force transfer surface 380 may be arranged between first reset lever 340 and the pedal element 320 such that the reset force acting on the pedal element 320 may be braced on the coupling element 330.
[0035] Reset unit 305 may further include one or more reset elements 370, 372, 374 operable to generate the reset force when the pedal element 320 is actuated. In some embodiments, reset elements 370, 372, 374 may be springs, such as cylindrical compression springs. For instance, each reset element 370, 372, 374 may be a compression spring having a generally cylindrical shape.
[0036] Reset unit 305 may further include a second reset lever 350 freely mounted to (e.g., around) the coupling element 330. As shown in FIG. 3, a second reset element 374 and a third reset element 370 may be operably coupled to the second reset lever 350. Specifically, a first reset element 372 may be operably coupled between the first reset lever 340 and the base portion 310. In addition, a second reset element 374 may be operably coupled between the second reset lever 350 and the base portion 310, while a third reset element 370 may be operably coupled between the first reset lever 340 and the second reset lever 350. In some embodiments, first reset element 372 and second reset element 374 may be operably coupled to base portion 310 via a spring cover 390 fixed to a surface of the base portion 310.
[0037] In some embodiments, a diameter of the second reset element 374 and a diameter of the third reset element 370 is different than a diameter of the first reset element 372. For instance, a diameter of the second reset element 374 may be about the same as a diameter of the third reset element 370, and a diameter of the first reset element 372 may be less than diameter of the second reset element 374 and the diameter of the third reset element 370.
[0038] In some embodiments, the first reset element 372 may be positioned within a volume defined by the second reset element 374 and the third reset element 370. For instance, each reset element 370, 372, 374 may be a spring defining a volume. As shown in FIG. 3, first reset element 372 may be positioned within the coils of the second reset element 374 and the third reset element 370.
[0039] FIGs. 4A and 4B provide plots of example characteristic reset curves of the example brake pedal units according to example embodiments of the present disclosure. As shown in FIGs. 4A and 4B, the force in newtons (N) is plotted over the operating angle in degrees. As shown, the operating angle may span a range of 0 degrees to about 67 degrees. The range of the operating angle shown may correspond to a period of operation for the brake pedal unit. For instance, an angle of 0 degrees may correspond to an unactuated (e.g., un-pressed) pedal element, while an angle of about 65 degrees may correspond to a fully actuated pedal element. In addition, a force curve of a reset force with increasing operation of the brake pedal unit is depicted as a solid line in FIGs. 4A and 4B, while a force curve of a reset force with decreasing operation of the brake pedal unit is depicted as a dotted (e.g., dashed) line in FIGs. 4A and 4B. Specifically, FIG. 4A provides an example characteristic curve of brake pedal unit 100 depicted in FIG. 1, while FIG. 4B provides an example characteristic curve of brake pedal unit 300 depicted in FIG. 3.
[0040] Referring now specifically to FIG. 4A, a plot depicting the example operating characteristics of the brake pedal unit 100 is provided. As shown, brake pedal unit 100 may have a force peak 410 at about 200 newtons (N) . This force peak 410 may correspond to an operating angle of about 65 degrees.
[0041] Referring now specifically to FIG. 4B, a plot depicting the example operating characteristics of the brake pedal unit 300 is provided. As shown, brake pedal unit 300 may have a force peak 410 at about 200 newtons (N) . This force peak 420 may correspond to an operating angle of about 65 degrees.
[0042] As previously described with reference to FIG. 3, brake pedal unit 300 may include a first reset element 372, a second reset element 374 and a third reset element 370. The force characteristic (e.g., characteristic reset curves) of brake pedal unit 300 may be generated by the first reset element 372, the second reset element 374 and the third reset element 370. Specifically, different reset elements 370, 372, 374 may generate the reset force based on the period of operation of the brake pedal unit 300. For instance, as shown in FIG. 4B, the operation period of brake pedal unit 300 may include a first period of operation 430 and a second period of operation 440. During the first period of operation 430, the first reset element 372 and the second reset element 374 may generate the reset force. During the second period of operation 440, the first reset element 372 and the third reset element 370 may generate the reset force.
[0043] In some embodiments, the first period of operation 430 may correspond to a first operating angle range, such as a range of about 0 degrees to about 43 degrees. Similarly, the second period of operation 440 may correspond to a second operating angle range, such as a range of about 43 degrees to about 65 degrees.
[0044] For example, referring back to FIG. 3, when the pedal element 320 is operated (e.g., actuated) , first reset element 372 and the second reset element 374 may be pressed together until the second reset lever 350 is pressed to base portion 310 (e.g., the spring cover 390 of base portion 310) . After the second reset lever 350 is pressed to the base portion 310 (e.g., the spring cover 390 of base portion 310) , the first reset element 372 and the third reset element 370 may then be pressed together.
[0045] FIG. 5 provides a cross-sectional side view of a force module unit 500 for a brake pedal unit according to example embodiments of the present disclosure. While the force module unit 500 of FIG. 5 is generally described with reference to brake pedal unit 300 as described with reference to FIG. 3, those of ordinary will understand that force module unit 500 may be implemented with any suitable brake pedal unit, such as brake pedal unit 100 described with reference to FIG. 1.
[0046] As shown in FIG. 5, a brake pedal unit 300 may include a force module unit 500. Specifically, force module unit 500 may be operable to generate a force offset to the reset force generated by a reset unit of a brake pedal unit. For instance, a reset unit as described herein may be configured to generate a reset force on a pedal element. The characteristic reset curve associated with this reset force may correspond to a power mode (e.g., baseline power mode) of the brake pedal unit. Force module unit 500 may be configured to generate a force offset to the reset force for additional power modes that may correspond to various vehicle modes in vehicle operation such as sport mode, comfort mode, off-road mode, etc.
[0047] As shown in FIG. 5, force module unit 500 may be switched between an on state and an off state, such that force module unit 500 may transmit the force offset to the brake pedal unit 300 when in the on state. When the force module unit is operating in the off state, the force characteristics (e.g., baseline force characteristics) of the brake pedal unit 300 generated by the reset unit may be active. When switched to the on state, an additional negative or positive force may be introduced to the reset force generated by the reset unit such that a force offset to the characteristic curve of the brake pedal unit 300 (e.g., baseline force characteristics) is generated.
[0048] In some embodiments, force module unit 500 may only shift a portion of the baseline characteristic curve of the brake pedal unit 300 negatively or positively in parallel. For instance, the force module unit 500 may add a first offset force to a first period of operation of the brake pedal unit 300 and / or a second offset force to a second period of operation of the brake pedal unit 300.
[0049] The force module unit 500 may include a plunger 510, such that the force module unit 500 is operably coupled to the brake pedal unit 300 via plunger 510. Specifically, plunger 510 may be directly coupled to a reset lever 340 (e.g., first reset lever 340) of the brake pedal unit. Additionally, the force module unit 500 can be operably coupled to the brake pedal unit 300 via the plunger 510 in such a way that the plunger 510 is directly coupled to the pedal element 320.
[0050] FIG. 6 provides an example force / path diagram of an example brake pedal unit according to example embodiments of the present disclosure. Specifically, example characteristic curves of the brake pedal unit 300 implementing the force module unit 500 of FIG. 5 are provided.
[0051] As shown in FIG. 6, baseline curve 600 is an example force characteristic curve of a brake pedal unit. Curves 610, 620, 630, 640 are example force characteristic curves of a brake pedal unit implemented with force module unit 500. Specifically, baseline curve 600 may be generated by brake pedal unit 300 when force module unit 500 is in an off state, while curves 610, 620, 630, 640 may be generated when the force module unit 500 is in an on state.
[0052] As shown by curve 610 and curve 620, force module unit 500 may introduce a positive force, such that a positive force offset is added to the baseline curve 600. Additionally and / or alternatively, force module unit 500 may introduce a negative force, such that a negative force offset is added to the baseline curve 600 as shown by curve 630 and curve 640.
[0053] In some embodiments, force module unit 500 may only shift a portion of the baseline characteristic curve 600 negatively or positively in parallel. For instance, as shown by curve 620 and curve 640, a first period of operation of the brake pedal unit may correspond to baseline curve 600. During a second period of operation, a positive offset may be introduced as shown by curve 620. Alternatively, a negative offset may be introduced during a second period of operation as shown by curve 640. Accordingly, force module unit 500 may only shift a portion of a baseline curve generated by a brake pedal unit.
[0054] One example aspect of the present disclosure is directed to a brake pedal unit for a motor vehicle. The brake pedal unit includes a base portion. The brake pedal unit further includes a pedal element operable to be adjusted relative to the base portion during operation of the brake pedal unit, the pedal element operably coupled to the base portion via a coupling element. The brake pedal unit further includes a reset unit operable to generate a reset force on the pedal element. The reset unit includes a first reset lever operably coupled to the pedal element via a force transfer surface. The reset unit further includes one or more reset elements operable to generate the reset force when the pedal element is actuated.
[0055] In some examples, the one or more reset elements include a first reset element operably coupled between the pedal element and the base portion and one or more second reset elements operably coupled between the first reset lever and the base portion.
[0056] In some examples, the one or more second reset elements comprises a second reset element and a third reset element.
[0057] In some examples, the first reset element is spaced apart from the coupling element by a first distance, the second reset element is spaced apart from the coupling element by a second distance, and the third reset element is spaced apart from the coupling element by a third distance, the first distance being greater than the second distance and the third distance.
[0058] In some examples, the first reset element and the one or more second reset elements are conical springs.
[0059] In some examples, the reset unit further includes a second reset lever freely mounted to the coupling element.
[0060] In some examples, the one or more reset elements include a first reset element operably coupled between the first reset lever and the base portion, a second reset element operably coupled between the second reset lever and the base portion, and a third reset element operably coupled between the first reset lever and the second reset lever.
[0061] In some examples, the first reset element, the second reset element, and the third reset element are cylindrical compression springs.
[0062] In some examples, a diameter of the second reset element and a diameter of the third reset element is different than a diameter of the first reset element.
[0063] In some examples, the first reset element and the second reset element are configured to generate the reset force during a first period of operation of the brake pedal unit and the first reset element and the third reset element are configured to generate the reset force during a second period of operation of the brake pedal unit.
[0064] In some examples, the first reset element is positioned within a volume defined by the second reset element and the third reset element.
[0065] In some examples, the brake pedal unit further includes a force module unit operable to generate a force offset to the reset force generated by the reset unit.
[0066] In some examples, the force module unit is operably coupled to the first reset lever via a plunger.
[0067] Another example aspect of the present disclosure is directed to a brake pedal unit for a motor vehicle. The brake pedal unit includes a base portion. The brake pedal unit further includes a pedal element operable to be adjusted relative to the base portion during operation of the brake pedal unit, the pedal element operably coupled to the base portion via a coupling element. The brake pedal unit further includes a reset unit operable to generate a reset force on the pedal element. The reset unit includes a first reset lever operably coupled to the pedal element via a force transfer surface. The reset unit further includes a first reset element. The reset unit further includes a second reset element. The reset unit further includes a third reset element.
[0068] In some examples, the first reset element and the second reset element are configured to generate the reset force during a first period of operation of the brake pedal unit, the first period corresponding to a first range of the angle of the pedal element relative to the base portion.
[0069] In some examples, the first reset element and the third reset element are configured to generate the reset force during a second period of operation of the brake pedal unit, the second period corresponding to a second range of the angle of the pedal element relative to the base portion.
[0070] In some examples, the first reset element, the second reset element, and the third reset element are cylindrical compression springs.
[0071] In some examples, the first reset element is positioned within a volume defined by the second reset element and the third reset element.
[0072] Another example aspect of the present disclosure is directed to a brake pedal unit for a motor vehicle. The brake pedal unit includes a base portion. The brake pedal unit further includes a pedal element operable to be adjusted relative to the base portion during operation of the brake pedal unit, the pedal element operably coupled to the base portion via a coupling element. The brake pedal unit further includes a reset unit operable to generate a reset force on the pedal element. The reset unit includes a first reset lever operably coupled to the pedal element via a force transfer surface. The reset unit further includes a second reset lever freely mounted to the coupling element. The reset unit further includes a first reset element operably coupled between the first reset lever and the base portion. The reset unit further includes a second reset element operably coupled between the second reset lever and the base portion. The reset unit further includes a third reset element operably coupled between the first reset lever and the second reset lever.
[0073] In some examples, the brake pedal unit further includes a force module unit operable to generate a force offset to the reset force generated by the reset unit.
[0074] While the present subject matter has been described in detail with respect to specific example embodiments thereof, it will be appreciated that those skilled in the art, upon attaining an understanding of the foregoing may readily produce alterations to, variations of, and equivalents to such embodiments. Accordingly, the scope of the present disclosure is by way of example rather than by way of limitation, and the subject disclosure does not preclude inclusion of such modifications, variations and / or additions to the present subject matter as would be readily apparent to one of ordinary skill in the art.
Claims
1.A brake pedal unit for a motor vehicle, comprising:a base portion;a pedal element operable to be adjusted relative to the base portion during operation of the brake pedal unit, the pedal element operably coupled to the base portion via a coupling element; anda reset unit operable to generate a reset force on the pedal element, the reset unit comprising:a first reset lever operably coupled to the pedal element via a force transfer surface; andone or more reset elements operable to generate the reset force when the pedal element is actuated.2.The brake pedal unit of claim 1, wherein the one or more reset elements comprises:a first reset element operably coupled between the pedal element and the base portion; andone or more second reset elements operably coupled between the first reset lever and the base portion.3.The brake pedal unit of claim 2, wherein the one or more second reset elements comprises a second reset element and a third reset element.4.The brake pedal unit of claim 3, wherein the first reset element is spaced apart from the coupling element by a first distance, the second reset element is spaced apart from the coupling element by a second distance, and the third reset element is spaced apart from the coupling element by a third distance, the first distance being greater than the second distance and the third distance.5.The brake pedal unit of claim 2, wherein the first reset element and the one or more second reset elements are conical springs.6.The brake pedal unit of claim 1, wherein the reset unit further comprises:a second reset lever freely mounted to the coupling element.7.The brake pedal unit of claim 6, wherein the one or more reset elements comprises:a first reset element operably coupled between the first reset lever and the base portion;a second reset element operably coupled between the second reset lever and the base portion; anda third reset element operably coupled between the first reset lever and the second reset lever.8.The brake pedal unit of claim 7, wherein the first reset element, the second reset element, and the third reset element are cylindrical compression springs.9.The brake pedal unit of claim 7, wherein a diameter of the second reset element and a diameter of the third reset element is different than a diameter of the first reset element.10.The brake pedal unit of claim 7, wherein the first reset element and the second reset element are configured to generate the reset force during a first period of operation of the brake pedal unit and the first reset element and the third reset element are configured to generate the reset force during a second period of operation of the brake pedal unit.11.The brake pedal unit of claim 10, wherein the first reset element is positioned within a volume defined by the second reset element and the third reset element.12.The brake pedal unit of claim 1, further comprising:a force module unit operable to generate a force offset to the reset force generated by the reset unit.13.The brake pedal unit of claim 12, wherein the force module unit is operably coupled to the first reset lever via a plunger.14.A brake pedal unit for a motor vehicle, comprising:a base portion;a pedal element operable to be adjusted relative to the base portion during operation of the brake pedal unit, the pedal element operably coupled to the base portion via a coupling element; anda reset unit operable to generate a reset force on the pedal element, the reset unit comprising:a first reset lever operably coupled to the pedal element via a force transfer surface;a first reset element;a second reset element; anda third reset element.15.The brake pedal unit of claim 14, wherein the first reset element and the second reset element are configured to generate the reset force during a first period of operation of the brake pedal unit, the first period corresponding to a first range of the angle of the pedal element relative to the base portion.16.The brake pedal unit of claim 15, wherein the first reset element and the third reset element are configured to generate the reset force during a second period of operation of the brake pedal unit, the second period corresponding to a second range of the angle of the pedal element relative to the base portion.17.The brake pedal unit of claim 14, wherein the first reset element, the second reset element, and the third reset element are cylindrical compression springs.18.The brake pedal unit of claim 17, wherein the first reset element is positioned within a volume defined by the second reset element and the third reset element.19.A brake pedal unit for a motor vehicle, comprising:a base portion;a pedal element operable to be adjusted relative to the base portion during operation of the brake pedal unit, the pedal element operably coupled to the base portion via a coupling element; anda reset unit operable to generate a reset force on the pedal element, the reset unit comprising:a first reset lever operably coupled to the pedal element via a force transfer surface;a second reset lever freely mounted to the coupling element;a first reset element operably coupled between the first reset lever and the base portion;a second reset element operably coupled between the second reset lever and the base portion; anda third reset element operably coupled between the first reset lever and the second reset lever.20.The brake pedal unit of claim 19, further comprising:a force module unit operable to generate a force offset to the reset force generated by the reset unit.
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