System for mutual backup of electronic accelerator pedal and electronic brake pedal

Abstract

The invention discloses a system for mutual backup of an electronic accelerator pedal and an electronic brake pedal, and relates to the technical field of vehicle driving and braking control. The mode control module is used for controlling switching among a normal double-pedal driving mode, an accelerator pedal single-driving mode and a brake pedal single-driving mode; the fault detection unit is used for detecting electronic faults of the accelerator pedal and the brake pedal; and the pedal control unit performs logic control on the accelerator pedal and / or the brake pedal according to the mode control switched by the mode control module, and the working logic of the system in which the electronic accelerator pedal and the electronic brake pedal are mutually backed up comprises the following steps that the fault detection unit detects the electronic faults of the accelerator pedal and the brake pedal in real time. Through a system architecture reconstruction mode, on the basis of not increasing basic hardware, multiple redundant backup of driver input signals of a vehicle driving system / braking system is met, and controllability and safety after a vehicle breaks down are improved.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle driving and braking control, and in particular to a system in which an electronic accelerator pedal and an electronic brake pedal serve as backup for each other. Background Art

[0002] As a wire-controlled input unit, the electronic accelerator pedal has been widely used in fuel engine electronic fuel injection systems and new energy electric drive systems; the electronic brake pedal as a wire-controlled brake system input unit has also gradually entered the mass production application stage.

[0003] A failure in the electronic accelerator pedal sensor may cause the vehicle to be unable to accelerate, and a failure in the electronic brake pedal sensor may cause the vehicle to be unable to decelerate. Therefore, functional safety and redundant backup requirements are fully considered in the mechanical and electronic design of both sensors, and they can meet the requirements of usage scenarios in most cases.

[0004] In the existing system architecture, the throttle position sensor signal is transmitted to the power control unit, and the brake position sensor signal is transmitted to the main brake control unit and the backup brake control unit respectively; the power control unit and the brake control unit are connected to the vehicle CAN through the power CAN and the brake CAN respectively; the throttle position signal and the brake position signal have no mutual backup relationship.

[0005] This has the following disadvantages: the throttle signal and the brake signal have no mutual backup relationship. When one of them has an electronic failure or a mechanical failure, the vehicle will immediately enter a broken-down state and cannot continue to drive.

[0006] To this end, the present invention proposes a system in which an electronic accelerator pedal and an electronic brake pedal serve as backup for each other. Summary of the invention

[0007] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a system in which an electronic accelerator pedal and an electronic brake pedal serve as backup for each other.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions: A system in which an electronic accelerator pedal and an electronic brake pedal serve as backup for each other, comprising: A mode control module, which is used to control the switching between a normal dual-pedal driving mode, an accelerator pedal single driving mode, and a brake pedal single driving mode; A fault detection unit, which is used to detect electronic faults of the accelerator pedal and the brake pedal; A pedal control unit, which performs logic control on the accelerator pedal and / or brake pedal according to the mode control switched by the mode control module; The working logic of the system in which the electronic accelerator pedal and the electronic brake pedal serve as backup for each other includes the following steps: S1: The fault detection unit detects electronic faults of the accelerator pedal and brake pedal in real time, and the driver assists in determining mechanical faults of the accelerator pedal and brake pedal; S2: When both the accelerator pedal and the brake pedal are operating normally, the mode control module switches to the dual-pedal driving mode; S3: When the fault detection unit detects an electronic fault in the brake pedal, the mode control module switches to the accelerator pedal single drive mode. At the same time, when the driver finds a mechanical fault in the brake pedal, he manually switches to the accelerator pedal single drive mode. After the mode is switched, the pedal control unit discards the electronic information of the brake pedal and controls the accelerator pedal with the accelerator pedal single drive logic; S4: When the fault detection unit detects an electronic fault in the accelerator pedal, the mode control module switches to the brake pedal single drive mode. At the same time, when the driver finds a mechanical fault in the accelerator pedal, he manually switches to the brake pedal single drive mode. After the mode is switched, the pedal control unit discards the electronic information of the accelerator pedal and controls the brake pedal with the brake pedal single drive logic.

[0009] Preferably: in the steps S3 and S4, the accelerator pedal single drive logic or the brake pedal single drive logic includes the following steps: A1: After entering the pedal single drive logic, the on-board computer obtains the maximum vehicle speed according to the preset value , Maximum braking acceleration And the pedal acceleration / deceleration switching critical stroke P; A2: When the accelerator pedal or brake pedal is within 0%-P%, the vehicle is in a deceleration state, and the maximum deceleration acceleration is When the pedal stroke of the accelerator pedal or brake pedal is P%-100%, the vehicle is in the acceleration state, and the maximum acceleration speed is , when the pedal stroke is at P%, the vehicle neither accelerates nor brakes.

[0010] Further: In the step A1, the critical stroke P is the area value , when the pedal stroke is at , the vehicle neither accelerates nor brakes.

[0011] On the basis of the above scheme: the electronic accelerator pedal and the electronic brake pedal have the same mechanical structure, both of which include a swivel and fixed end covers rotatably connected to both sides of the swivel, the fixed end covers are connected to the vehicle body through a connecting frame, and the outer wall of the swivel is connected to the pedal through connecting ribs.

[0012] A better solution in the aforementioned solution is that the inner wall of the rotating ring is matched with an acceleration transmission component through tooth transmission, and the inner wall of the fixed end cover is fixed with an extended-range mechanical-electronic signal sensing component that cooperates with the acceleration transmission component.

[0013] As a further solution of the present invention: the acceleration transmission assembly includes multiple planetary gears and a sun gear, and the multiple planetary gears are rotatably connected to the inner wall of the fixed end cover through the wheel axle, the outer side of the planetary gear is engaged with the teeth, and the inner side of the planetary gear is engaged with the same sun gear, and the inner wall of the sun gear is fixed with a main shaft.

[0014] At the same time, the extended-range mechanical-electronic signal sensing component includes a spiral resistor insulated and fixed to the inner wall of the fixed end cover and an electrode head that is in contact with the spiral resistor and is electrically conductive. One end of the spiral resistor and the electrode head are connected to a power supply circuit that can measure current, and the power supply circuit is connected to an on-board computer. The on-board computer monitors the pedal stroke by monitoring the current in the power supply circuit.

[0015] As a preferred embodiment of the present invention: a slider is slidably connected to one side of the electrode head, a spring is buckled on the opposite side of the electrode head and the slider, the slider is slidably connected to the side wall of the main shaft, and the sliding direction is the axial direction of the main shaft.

[0016] At the same time, the closed inner cavity formed by the fixed end cover and the rotating ring is filled with insulating oil, and a heat dissipation mechanism is provided on one of the fixed end covers; The heat dissipation mechanism includes a heat dissipation pipe fixed to the outer wall of the fixed end cover and a variable-power fluid drive component arranged on the inner side of the fixed end cover. The variable-power fluid drive component includes a rotating frame that is transmission-matched with the outer wall of the main shaft and a plurality of elastic hoses bonded to the inner wall of the fixed end cover. The end of the rotating frame is rotatably connected to a roller, and the roller and the elastic hose are rolling and extrudingly matched. One end of the plurality of elastic hoses is connected to one end of the heat dissipation pipe, and the other end of the elastic hose and the other end of the heat dissipation pipe are connected to the closed inner cavity composed of the fixed end cover and the swivel.

[0017] As a more preferred solution of the present invention: the elastic hoses are arranged in parallel in a plurality, and the width of the roller is greater than the span of the plurality of the elastic hoses, the outer wall of the main shaft is provided with a key-shaped groove, the rotating frame is fitted in the key-shaped groove through a key-shaped protrusion welded on the inner wall thereof, and the side wall of the sun gear is provided with a thermal expansion and contraction type telescopic component for driving the rotating frame to move; The thermal expansion and contraction type telescopic assembly comprises an annular shell fixed to the side wall of the sun gear and an annular plug slidably connected to the inner wall of the annular shell, the other side of the annular plug is connected to the side wall of the rotating frame through an annular frame, and the inner cavity of the annular shell is filled with thermal expansion fluid; The thermal expansion fluid is a mixed gas of nitrogen dioxide and nitrogen tetroxide, and the equation for its reversible reaction is: .

[0018] The beneficial effects of the present invention are: 1. The present invention, through the reconstruction of the system architecture, realizes multiple redundant backup of the driver input signal of the vehicle drive system / brake system without adding basic hardware, thereby improving the controllability and safety of the vehicle after a failure.

[0019] 2. The present invention sets the critical stroke as a regional value, so that in the single-pedal operation mode, the driver's "blank" operating stroke is increased, the operation tolerance is increased, and energy waste caused by frequent switching of acceleration and braking near the critical stroke point is prevented.

[0020] 3. The present invention, by setting an acceleration transmission component and an extended-range mechanical-electronic signal sensing component, the acceleration transmission component can amplify the pedal stroke, and cooperate with the extended-range mechanical-electronic signal sensing component to make the amplified stroke move again along a spiral path, so that the electrical signal generated by the pedaling amplitude can be proportionally amplified, thereby reducing the error of converting mechanical motion into electronic signals and increasing control accuracy.

[0021] 4. The present invention can lubricate various moving parts and reduce wear by adding insulating oil into the closed inner cavity, and by providing a heat dissipation pipe and a variable power fluid drive component, on the one hand, it can dissipate heat from the closed inner cavity of the fixed end cover and the swivel, thereby ensuring its reliable operation, and on the other hand, the fluid driving power for heat dissipation comes from the pedaling drive, saving power layout.

[0022] 5. The present invention, by providing a thermal expansion and contraction telescopic component and a plurality of elastic hoses, can, on the one hand, utilize the thermal expansion and contraction effect of the thermal expansion fluid to make the heat dissipation efficiency and the temperature of the closed inner cavity adaptively matched; on the other hand, the thermal expansion fluid is set to a mixed gas of nitrogen dioxide and nitrogen tetroxide, and the chemical equilibrium shift during temperature changes can be utilized to ensure driving reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the architecture of the prior art; Figure 2 A schematic diagram of the architecture of a system in which an electronic accelerator pedal and an electronic brake pedal serve as backup for each other, proposed by the present invention; Figure 3 A schematic diagram of a structural diagram of a throttle pedal damage in a system in which an electronic throttle pedal and an electronic brake pedal serve as backup for each other, as proposed by the present invention; Figure 4 A schematic diagram of the structure of a brake pedal damage in a system in which an electronic accelerator pedal and an electronic brake pedal serve as backup for each other, proposed by the present invention; Figure 5 A schematic diagram of the overall structure of an electronic accelerator pedal and an electronic brake pedal in a system in which the electronic accelerator pedal and the electronic brake pedal serve as backup for each other proposed by the present invention; Figure 6 A schematic diagram of the internal structure of an electronic accelerator pedal and an electronic brake pedal in a system in which the electronic accelerator pedal and the electronic brake pedal serve as backup for each other proposed by the present invention; Figure 7 A schematic diagram of the structure of an acceleration transmission component of a system in which an electronic accelerator pedal and an electronic brake pedal serve as backup for each other, proposed by the present invention; Figure 8 A schematic diagram of the structure of an extended-range mechanical-electronic signal sensing component of a system in which an electronic accelerator pedal and an electronic brake pedal serve as backup for each other, proposed by the present invention; Fig. 9 A schematic diagram of the structure of a variable power fluid drive assembly for a system in which an electronic accelerator pedal and an electronic brake pedal serve as backup for each other proposed by the present invention Figure 1 ; Fig.10 A schematic diagram of the structure of a variable power fluid drive assembly for a system in which an electronic accelerator pedal and an electronic brake pedal serve as backup for each other proposed by the present invention Figure 2 ; Fig.11 A schematic cross-sectional structure diagram of a thermal expansion and contraction type telescopic component of a system in which an electronic accelerator pedal and an electronic brake pedal serve as backup for each other, as proposed by the present invention; Fig.12 A schematic cross-sectional structure diagram of the cooperation between the fixed end cover and the swivel of a system in which an electronic accelerator pedal and an electronic brake pedal serve as backup for each other proposed by the present invention; Fig.13 This is a schematic diagram of the heat dissipation pipeline structure of a system in which an electronic accelerator pedal and an electronic brake pedal serve as backup for each other, as proposed by the present invention.

[0024] In the figure: 1. connecting frame; 2. fixed end cover; 3. swivel; 4. pedal; 5. connecting rib; 6. acceleration transmission assembly; 7. extended-range mechanical-electronic signal sensing assembly; 8. teeth; 9. heat dissipation mechanism; 10. planetary gear; 11. axle; 12. main shaft; 13. sun gear; 14. spiral resistor; 15. electrode head; 16. spring 1; 17. slider; 18. heat dissipation pipe; 19. variable power fluid drive assembly; 20. key-shaped groove; 21. key-shaped protrusion; 22. elastic hose; 23. rotating frame; 24. roller; 25. thermal expansion and contraction type telescopic assembly; 26. thermal expansion fluid; 27. annular shell; 28. annular plug; 29. ​​annular frame; 30. groove; 31. convex ring. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] Embodiment 1: A system in which an electronic accelerator pedal and an electronic brake pedal serve as backup for each other, such as Figure 1-4 As shown, it includes: A mode control module, which is used to control the switching between a normal dual-pedal driving mode, an accelerator pedal single driving mode, and a brake pedal single driving mode; A fault detection unit, which is used to detect electronic faults of the electronic accelerator pedal and the electronic brake pedal; A pedal control unit, which performs logic control on the accelerator pedal and / or brake pedal according to the mode control switched by the mode control module; The working logic of the system in which the electronic accelerator pedal and the electronic brake pedal serve as backup for each other includes the following steps: S1: The fault detection unit detects electronic faults of the accelerator pedal and brake pedal in real time, and the driver assists in determining mechanical faults of the accelerator pedal and brake pedal; S2: When both the accelerator pedal and the brake pedal are operating normally, the mode control module switches to the dual-pedal driving mode; S3: When the fault detection unit detects an electronic fault in the brake pedal, the mode control module switches to the accelerator pedal single drive mode. At the same time, when the driver finds a mechanical fault in the brake pedal, he manually switches to the accelerator pedal single drive mode. After the mode is switched, the pedal control unit discards the electronic information of the brake pedal and controls the accelerator pedal with the accelerator pedal single drive logic; S4: When the fault detection unit detects an electronic fault in the accelerator pedal, the mode control module switches to the brake pedal single drive mode. At the same time, when the driver finds a mechanical fault in the accelerator pedal, he manually switches to the brake pedal single drive mode. After the mode is switched, the pedal control unit discards the electronic information of the accelerator pedal and controls the brake pedal with the brake pedal single drive logic.

[0028] In the steps S3 and S4, the accelerator pedal single drive logic or the brake pedal single drive logic includes the following steps: A1: After entering the pedal single drive logic, the on-board computer obtains the maximum vehicle speed according to the preset value , Maximum braking acceleration And the pedal acceleration / deceleration switching critical stroke P; A2: When the accelerator pedal or brake pedal is within 0%-P%, the vehicle is in a deceleration state, and the maximum deceleration acceleration is When the pedal stroke of the accelerator pedal or brake pedal is P%-100%, the vehicle is in the acceleration state, and the maximum acceleration speed is , when the pedal stroke is at P%, the vehicle neither accelerates nor brakes.

[0029] The present invention, by means of system architecture reconstruction, realizes multiple redundant backup of driver input signals of the vehicle drive system / brake system without adding basic hardware, thereby improving the controllability and safety of the vehicle after a failure.

[0030] Embodiment 2: A system in which an electronic accelerator pedal and an electronic brake pedal serve as backup for each other, such as Figure 1-4 As shown, it includes: A mode control module, which is used to control the switching between a normal dual-pedal driving mode, an accelerator pedal single driving mode, and a brake pedal single driving mode; A fault detection unit, which is used to detect electronic faults of the accelerator pedal and the brake pedal; A pedal control unit, which performs logic control on the accelerator pedal and / or brake pedal according to the mode control switched by the mode control module; The working logic of the system in which the electronic accelerator pedal and the electronic brake pedal serve as backup for each other includes the following steps: S1: The fault detection unit detects electronic faults of the accelerator pedal and brake pedal in real time, and the driver assists in determining mechanical faults of the accelerator pedal and brake pedal; S2: When both the accelerator pedal and the brake pedal are operating normally, the mode control module switches to the dual-pedal driving mode; S3: When the fault detection unit detects an electronic fault in the brake pedal, the mode control module switches to the accelerator pedal single drive mode. At the same time, when the driver finds a mechanical fault in the brake pedal, he manually switches to the accelerator pedal single drive mode. After the mode is switched, the pedal control unit discards the electronic information of the brake pedal and controls the accelerator pedal with the accelerator pedal single drive logic; S4: When the fault detection unit detects an electronic fault in the accelerator pedal, the mode control module switches to the brake pedal single drive mode. At the same time, when the driver finds a mechanical fault in the accelerator pedal, he manually switches to the brake pedal single drive mode. After the mode is switched, the pedal control unit discards the electronic information of the accelerator pedal and controls the brake pedal with the brake pedal single drive logic.

[0031] In the steps S3 and S4, the accelerator pedal single drive logic or the brake pedal single drive logic includes the following steps: A1: After entering the pedal single drive logic, the on-board computer obtains the maximum vehicle speed according to the preset value , Maximum braking acceleration And the pedal acceleration / deceleration switching critical stroke P; A2: When the accelerator pedal or brake pedal is within 0%-P%, the vehicle is in a deceleration state, and the maximum deceleration acceleration is When the pedal stroke of the accelerator pedal or brake pedal is P%-100%, the vehicle is in the acceleration state, and the maximum acceleration speed is , when the pedal stroke is at P%, the vehicle neither accelerates nor brakes.

[0032] In the A1 step, the critical stroke P is the area value , when the pedal stroke is at , the vehicle neither accelerates nor brakes.

[0033] The present invention sets the critical stroke as a zone value, thereby increasing the driver's "blank" operating stroke in the single-pedal operating mode, increasing the operating error tolerance, and preventing energy waste caused by frequent switching of acceleration and braking near the critical stroke point.

[0034] Embodiment 3: A system in which an electronic accelerator pedal and an electronic brake pedal serve as backup for each other, such as Figure 5-Figure 13 As shown, this embodiment makes the following improvements on the basis of Embodiments 1 and 2: The electronic accelerator pedal has the same mechanical structure as the electronic brake pedal, and both include a swivel 3 and fixed end covers 2 rotatably connected to both sides of the swivel 3. The fixed end covers 2 are connected to the vehicle body through a connecting frame 1, and the outer wall of the swivel 3 is connected to the pedal 4 through a connecting rib 5.

[0035] The inner wall of the rotating ring 3 is matched with the acceleration transmission component 6 through the teeth 8, and the inner wall of the fixed end cover 2 is fixed with the extended-range mechanical-electronic signal sensing component 7 matched with the acceleration transmission component 6.

[0036] The acceleration transmission assembly 6 includes multiple planetary gears 10 and a sun gear 13. The multiple planetary gears 10 are rotatably connected to the inner wall of the fixed end cover 2 through the axle 11. The outer side of the planetary gear 10 is engaged with the teeth 8, and the inner side of the planetary gear 10 is engaged with the same sun gear 13. The inner wall of the sun gear 13 is fixed with a main shaft 12.

[0037] The extended-range mechanical-electronic signal sensing component 7 includes a spiral resistor 14 insulated and fixed to the inner wall of the fixed end cover 2 and an electrode head 15 that is in contact with the spiral resistor 14 and is electrically conductive. One end of the spiral resistor 14 and the electrode head 15 are connected to a power supply circuit that can measure current, and the power supply circuit is connected to an on-board computer. The on-board computer monitors the pedaling travel of the pedal 4 by monitoring the current in the power supply circuit.

[0038] A slider 17 is slidably connected to one side of the electrode head 15 , and a spring 16 is buckled on the opposite side of the electrode head 15 and the slider 17 . The slider 17 is slidably connected to the side wall of the main shaft 12 , and the sliding direction is the axial direction of the main shaft 12 .

[0039] When the device is in use, when the driver steps on the pedal 4, the force acting on the pedal 4 is transmitted to the swivel 3 through the connecting rib 5, and the swivel 3 rotates, thereby driving the sun gear 13 to rotate faster through the planetary gear 10, and the sun gear 13 drives the slider 17 to rotate through the main shaft 12, thereby driving the electrode head 15 to rotate. Since the electrode head 15 and the spiral resistor 14 are limited, the rotation of the electrode head 15 will move along the path of the spiral resistor 14, thereby changing the resistance of the spiral resistor 14 connected to the power supply circuit. When the voltage is constant, the change in the resistance of the spiral resistor 14 will cause the current of the power supply circuit to change, so the current is monitored to determine the connection resistance of the spiral resistor 14, thereby inferring the position of the electrode head 15, and then inferring the movement amplitude of the pedal 4 step by step according to the position of the electrode head 15, so as to obtain the pedal signal.

[0040] Correspondingly, the pedal 4 needs an elastic restoring force after being stepped on, and the elastic restoring force can be achieved by any of the following means: Solution 1: A reset torsion spring is provided between the fixed end cover 2 and the rotating ring 3, and a torque is applied to the rotating ring 3 by the reset torsion spring to reset the rotating ring 3; Solution 2: A return spring is provided between the connecting rib 5 and the vehicle body, and the return spring is used to return the elastic force provided by the connecting rib 5; Solution three: a reset torsion spring is provided at the rotation connection between the wheel axle 11 and the fixed end cover 2, and a torque is applied to the wheel axle 11 by the reset torsion spring to reset the wheel axle 11.

[0041] The device is provided with an acceleration transmission component 6 and an extended-range mechanical-electronic signal sensing component 7. The acceleration transmission component 6 can amplify the pedaling stroke of the pedal 4, and cooperate with the extended-range mechanical-electronic signal sensing component 7 to make the amplified stroke move again along a spiral path, so that the electrical signal generated by the pedaling amplitude can be amplified in proportion, thereby reducing the error of converting mechanical motion into electronic signals and increasing control accuracy.

[0042] The closed inner cavity formed by the fixed end cover 2 and the rotating ring 3 is filled with insulating oil, and a heat dissipation mechanism 9 is provided on one of the fixed end covers 2 .

[0043] The heat dissipation mechanism 9 includes a heat dissipation pipe 18 fixed to the outer wall of the fixed end cover 2 and a variable power fluid drive component 19 arranged on the inner side of the fixed end cover 2. The variable power fluid drive component 19 includes a rotating frame 23 that is transmission-matched with the outer wall of the main shaft 12 and a plurality of elastic hoses 22 bonded to the inner wall of the fixed end cover 2. The end of the rotating frame 23 is rotatably connected to a roller 24, and the roller 24 and the elastic hose 22 are rolling and extrudingly matched. One end of the plurality of elastic hoses 22 is connected to one end of the heat dissipation pipe 18, and the other end of the elastic hose 22 and the other end of the heat dissipation pipe 18 are connected to the closed inner cavity formed by the fixed end cover 2 and the swivel 3.

[0044] When the main shaft 12 rotates, it will drive the rotating frame 23 to rotate, thereby driving the roller 24 to rotate. The rotation of the roller 24 will squeeze the elastic hose 22, and the elastic hose 22 will rebound after being squeezed. As the roller 24 continues to squeeze the elastic hose 22, oil flow is formed in the elastic hose 22 and the heat dissipation pipe 18, so that the oil in the closed inner cavity is cooled through the swivel 3.

[0045] The device can lubricate various moving parts and reduce wear by adding insulating oil into the closed inner cavity, and by providing a heat dissipation pipe 18 and a variable power fluid drive component 19, on the one hand, it can dissipate heat from the closed inner cavity of the fixed end cover 2 and the swivel 3, thereby ensuring its reliable operation, and on the other hand, its heat dissipation fluid driving power comes from the pedaling drive of the pedal 4, saving power layout.

[0046] In order to solve the problem of adaptive control of heat dissipation power, such as Figure 10-11 As shown, the elastic hose 22 is arranged in parallel in multiple numbers, and the width of the roller 24 is greater than the span of the multiple elastic hoses 22. The outer wall of the main shaft 12 is provided with a key-shaped groove 20, and the rotating frame 23 is loosely fitted in the key-shaped groove 20 through a key-shaped protrusion 21 welded on its inner wall. The side wall of the sun gear 13 is provided with a thermal expansion and contraction telescopic component 25 for driving the rotating frame 23 to move.

[0047] The thermal expansion and contraction telescopic assembly 25 includes an annular shell 27 fixed to the side wall of the sun gear 13 and an annular plug 28 slidably connected to the inner wall of the annular shell 27. The other side of the annular plug 28 is connected to the side wall of the rotating frame 23 through an annular frame 29. The inner cavity of the annular shell 27 is filled with a thermal expansion fluid 26.

[0048] The thermal expansion fluid 26 is a mixed gas of nitrogen dioxide and nitrogen tetroxide, and the equation for its reversible reaction is: .

[0049] When the temperature of the closed inner cavity rises, on the one hand, the thermal expansion fluid 26 itself will expand due to the heat, and on the other hand, the mixed gas of nitrogen dioxide and dinitrogen tetroxide reversibly reacts and moves in the direction of generating nitrogen dioxide, thereby increasing the gas volume of the thermal expansion fluid 26, and the annular plug 28 moves outward due to the gas pressure, thereby driving the rotating frame 23 to move outward through the annular frame 29, so that the roller 24 moves. At this time, the number of elastic hoses 22 cooperating with the roller 24 increases, the circulation amount of the insulating oil increases, and the heat dissipation effect increases, and vice versa.

[0050] The device, by providing a thermal expansion and contraction telescopic component 25 and a plurality of elastic hoses 22, can, on the one hand, utilize the thermal expansion and contraction effect of the thermal expansion fluid 26 to make the heat dissipation efficiency and the temperature of the closed inner cavity adaptively matched, and on the other hand, the thermal expansion fluid 26 is set to a mixed gas of nitrogen dioxide and nitrogen tetroxide, and the chemical equilibrium shift during temperature changes can be utilized to ensure driving reliability.

[0051] In order to solve the sealing problem, such as Fig.12 As shown, the side wall of the fixed end cover 2 is provided with a plurality of communicating grooves 30, and the side wall of the rotating ring 3 is welded with a convex ring 31 which slides with the groove 30; by providing a plurality of grooves 30 and convex rings 31, the contact point between the fixed end cover 2 and the rotating ring 3 can be sealed to prevent leakage.

[0052] When the present embodiment is in use, when the driver steps on the pedal 4, the force exerted on the pedal 4 is transmitted to the swivel 3 through the connecting rib 5, and the swivel 3 rotates, thereby driving the sun gear 13 to rotate faster through the planetary gear 10, and the sun gear 13 drives the slider 17 to rotate through the main shaft 12, thereby driving the electrode head 15 to rotate. Since the electrode head 15 and the spiral resistor 14 are limited and matched, the rotation of the electrode head 15 will move along the path of the spiral resistor 14, thereby changing the resistance value of the spiral resistor 14 connected to the power supply circuit. When the voltage is constant, the change in the resistance value of the spiral resistor 14 will cause the current of the power supply circuit to change, so that the current is monitored to determine the size of the connection resistance value of the spiral resistor 14, thereby inferring the position of the electrode head 15, and then inferring the movement amplitude of the pedal 4 step by step according to the position of the electrode head 15, so as to obtain the pedal signal. When the main shaft 12 rotates, it will drive the rotating frame 23 to rotate. The roller 24 rotates, thereby driving the roller 24 to rotate. The rotation of the roller 24 squeezes the elastic hose 22, and the elastic hose 22 rebounds after being squeezed. As the roller 24 continues to squeeze the elastic hose 22, oil flow is formed in the elastic hose 22 and the heat dissipation pipe 18, so that the oil in the closed inner cavity is dissipated through the swivel 3. At the same time, when the temperature of the closed inner cavity increases, on the one hand, the thermal expansion fluid 26 itself will expand due to the heat, and on the other hand, the mixed gas of nitrogen dioxide and dinitrogen tetroxide can reversibly react and move in the direction of generating nitrogen dioxide, so that the gas volume of the thermal expansion fluid 26 increases, and the annular plug 28 moves outward under the gas pressure, thereby driving the rotating frame 23 to move outward through the annular frame 29, so that the roller 24 moves. At this time, the number of elastic hoses 22 cooperating with the roller 24 increases, the circulation amount of the insulating oil increases, and the heat dissipation effect increases, and vice versa.

[0053] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A system in which an electronic accelerator pedal and an electronic brake pedal serve as backup for each other, characterized in that: It includes: A mode control module, which is used to control the switching between a normal dual-pedal driving mode, an accelerator pedal single driving mode, and a brake pedal single driving mode; A fault detection unit, which is used to detect electronic faults of the accelerator pedal and the brake pedal; A pedal control unit, which performs logic control on the accelerator pedal and / or brake pedal according to the mode control switched by the mode control module; The working logic of the system in which the electronic accelerator pedal and the electronic brake pedal serve as backup for each other includes the following steps: S1: The fault detection unit detects electronic faults of the accelerator pedal and brake pedal in real time, and the driver assists in determining mechanical faults of the accelerator pedal and brake pedal; S2: When both the accelerator pedal and the brake pedal are operating normally, the mode control module switches to the dual-pedal driving mode; S3: When the fault detection unit detects an electronic fault in the brake pedal, the mode control module switches to the accelerator pedal single drive mode. At the same time, when the driver finds a mechanical fault in the brake pedal, he manually switches to the accelerator pedal single drive mode. After the mode is switched, the pedal control unit discards the electronic information of the brake pedal and controls the accelerator pedal with the accelerator pedal single drive logic; S4: When the fault detection unit detects an electronic fault in the accelerator pedal, the mode control module switches to the brake pedal single drive mode. At the same time, when the driver finds a mechanical fault in the accelerator pedal, the mode control module manually switches to the brake pedal single drive mode. After the mode is switched, the pedal control unit discards the electronic information of the accelerator pedal and controls the brake pedal with the brake pedal single drive logic. The electronic accelerator pedal and the electronic brake pedal have the same mechanical structure, and both comprise a swivel (3) and fixed end covers (2) rotatably connected to both sides of the swivel (3); the fixed end covers (2) are connected to the vehicle body via a connecting frame (1); and the outer wall of the swivel (3) is connected to a pedal (4) via a connecting rib (5); The inner wall of the rotating ring (3) is coupled with an acceleration transmission assembly (6) through teeth (8), and the inner wall of the fixed end cover (2) is fixed with an extended-range mechanical-electronic signal sensing assembly (7) coupled with the acceleration transmission assembly (6); The acceleration transmission assembly (6) comprises a plurality of planetary gears (10) and a sun gear (13), wherein the plurality of planetary gears (10) are rotatably connected to the inner side wall of the fixed end cover (2) via a wheel shaft (11), the outer sides of the planetary gears (10) are meshed with the teeth (8), and the inner sides of the planetary gears (10) are meshed with the same sun gear (13), and a main shaft (12) is fixed to the inner wall of the sun gear (13); The range-extending mechanical-electronic signal sensing component (7) comprises a spiral resistor (14) insulated and fixed to the inner wall of the fixed end cover (2) and an electrode head (15) contacting and limiting the spiral resistor (14) and electrically conducting, one end of the spiral resistor (14) and the electrode head (15) are connected to a power supply circuit capable of measuring current, and the power supply circuit is connected to a driving computer, and the driving computer monitors the pedaling travel of the pedal (4) by monitoring the current of the power supply circuit; A slider (17) is slidably connected to one side of the electrode head (15), a spring (16) is buckled on the opposite side of the electrode head (15) and the slider (17), and the slider (17) is slidably connected to the side wall of the main shaft (12), and the sliding direction is the axial direction of the main shaft (12).

2. A system in which an electronic accelerator pedal and an electronic brake pedal serve as backup for each other according to claim 1, characterized in that: In the steps S3 and S4, the accelerator pedal single drive logic or the brake pedal single drive logic includes the following steps: A1: After entering the pedal single drive logic, the on-board computer obtains the maximum vehicle speed according to the preset value , Maximum braking acceleration And the pedal acceleration / deceleration switching critical stroke P; A2: When the accelerator pedal or brake pedal is within 0%-P%, the vehicle is in a deceleration state, and the maximum deceleration acceleration is When the pedal stroke of the accelerator pedal or brake pedal is P%-100%, the vehicle is in the acceleration state, and the maximum acceleration speed is , when the pedal stroke is at P%, the vehicle neither accelerates nor brakes.

3. A system in which an electronic accelerator pedal and an electronic brake pedal serve as backup for each other according to claim 2, characterized in that: In step A1, the critical stroke P is the area value , when the pedal stroke is at , the vehicle neither accelerates nor brakes.

4. The system of an electronic accelerator pedal and an electronic brake pedal serving as backup for each other according to claim 1, characterized in that: The closed inner cavity formed by the fixed end cover (2) and the rotating ring (3) is filled with insulating oil, and a heat dissipation mechanism (9) is provided on one of the fixed end covers (2); The heat dissipation mechanism (9) comprises a heat dissipation pipe (18) fixed to the outer wall of the fixed end cover (2) and a variable power fluid drive assembly (19) arranged on the inner side of the fixed end cover (2). The variable power fluid drive assembly (19) comprises a rotating frame (23) drivingly matched with the outer wall of the main shaft (12) and a plurality of elastic hoses (22) bonded to the inner wall of the fixed end cover (2). The end of the rotating frame (23) is rotatably connected to a roller (24), the roller (24) and the elastic hose (22) are rollingly and extrusion-matched, and one end of the plurality of elastic hoses (22) is connected to one end of the heat dissipation pipe (18), and the other end of the elastic hose (22) and the other end of the heat dissipation pipe (18) are connected to a closed inner cavity formed by the fixed end cover (2) and the rotating ring (3).

5. A system in which an electronic accelerator pedal and an electronic brake pedal serve as backup for each other according to claim 4, characterized in that: The elastic hoses (22) are arranged in parallel in plurality, and the width of the roller (24) is greater than the span of the plurality of the elastic hoses (22); a key-shaped groove (20) is provided on the outer wall of the main shaft (12); a key-shaped protrusion (21) welded on the inner wall of the rotating frame (23) is loosely fitted in the key-shaped groove (20); and a thermal expansion and contraction type telescopic component (25) for driving the rotating frame (23) to move is provided on the side wall of the sun gear (13); The thermal expansion and contraction type telescopic assembly (25) comprises an annular shell (27) fixed to the side wall of the sun gear (13) and an annular plug (28) slidably connected to the inner wall of the annular shell (27); the other side of the annular plug (28) is connected to the side wall of the rotating frame (23) via an annular frame (29); and the inner cavity of the annular shell (27) is filled with a thermal expansion fluid (26); The thermal expansion fluid (26) is a mixed gas of nitrogen dioxide and nitrogen tetroxide, and the equation for its reversible reaction is: .

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